Shanghai Huabang Industrial Business Network - voltage relay

[voltage relay]AVM-NB Voltage Relay

2026-6-15 18:38:58

AVM-NB voltage relay

Automatic tripping protection when the phase sequence is incorrect (reverse phase) and the voltage is too high or too low
The set value can range from ± 5% to ± 29% of the rated voltage
If the voltage exceeds or falls short, the internal relay immediately returns to its original position and cuts off the power supply
Action delay time range: adjustable from 1.0 to 10.0 seconds
Action reset time range: adjustable from 1.0 to 10.0 seconds
Digital display of actual voltage value

model		AVM-NB��YB	AVM-N1B��Y1B
		three-phase	single-phase
rated voltage		AC(V):220,240,380,415,440,480,50/60Hz
Output contact		1C 5A
Indicator light action		Indication during action
longevity fate	Mechanics	5×10^6 times
	Electrical	10^5 times
Setting error		±5% max
Return time		0.1 sec max
power consumption		3VA
Environmental temperature for use		-10��~+55��
Environmental humidity for use		45%~85%RH
weight		Approx.210g

AVM-NB voltage relay wiring diagram and timing diagram

Appearance dimension diagram of AVM-NB voltage relay

[voltage relay]AVMR-D Voltage Relay

2026-6-15 18:38:50

AVMR-D voltage relay
If the voltage exceeds or falls short, the internal relay immediately returns to its original position and cuts off the power supply
Action reset time: adjustable from 0 to 15 seconds
12VDC setting range: low voltage 10~14V, high voltage 13~17V
24VDC setting range: low voltage 20~28V, high voltage 26~34V
36VDC setting range: low voltage 30~42V, high voltage 39~51V
48VDC setting range: low voltage 40~56V, high voltage 52~68V

model		AVMR-D
rated voltage		DC(V):12,24,36,48
Output contact		2C 5A
Indicator light action		Two indicator lights
longevity fate	Mechanics	5×10^6 times
	Electrical	10^5 times
Setting error		±10% max
Return time		0.1 sec max
power consumption		2VA
Environmental temperature for use		-10��~+55��
Environmental humidity for use		45%~85%RH
weight		Approx.110g

AVMR-D voltage relay wiring diagram and timing diagram

Appearance dimension diagram of AVMR-D voltage relay

AVMR-D voltage relay

[voltage relay]BY-4C type voltage relay

2026-6-15 18:38:41

1. Purpose
BY-4C voltage relay is used in electrical control equipment, refrigeration equipment, and electrical control circuits as overvoltage or undervoltage protection.
2. Structural characteristics
The BY-4C voltage relay is a transistor type. The shell structure adopts HK-1 (protruding rear wiring) and HK-1Q (protruding front wiring). The external dimensions, opening dimensions, etc. are shown in the appendix diagram of this manual.

3. Main technical data of BY-4C voltage relay

*Communication rated value

undervoltage

adjustment range

overvoltage

adjustment range

power consumption

��VA��

Contact form

Control capacity

��kVA��

Voltage (V)

Frequency (Hz)

24��48

110��127

220��380

50 or 60

1%~20%

1%~10%

two point seven

2 Conversion

one point one

4. Rear terminal wiring diagram

[voltage relay]BY-4E type voltage relay

2026-6-15 18:38:32

1. Purpose
BY-4E type voltage relay is a small rated overvoltage relay used in relay protection circuits as a blocking element for directional lateral differential protection.
2. Structural characteristics
The BY-4E voltage relay is a transistor relay. The basic shell adopts the HCK-11A/3 shell from the HCK-10 series shell components, with three installation and wiring methods: protruding front wiring, rear wiring, and embedded rear wiring. Please specify when ordering. The external dimensions and opening dimensions of the relay can be found in the appendix of this manual.

3. Main technical data of BY-4E voltage relay

Exchange amount

Constant voltage

(V)

Rated frequency

Rate (Hz)

*Auxiliary Direct

Current voltage

(V)

Voltage regulation

Defined scope

(V)

return

coefficient

action

time

(S)

contact point

form

power consumption

contact point

disconnect

capacity

weight

(kg)

communication

direct current

one hundred and ten

fifty

two hundred and twenty

one hundred

forty-eight

2~15

��

zero point eight five

zero point zero four

1. Dynamic combination

1. Dynamic interruption

��

6VA

220V��6W

110V��4W

48V��2W

DC 10W

Exchange 20VA

one

4. Rear terminal wiring diagram, external resistor appearance and installation dimension diagram

[voltage relay]RY-DA,RY-DB Rail mounted voltage relay

2026-6-15 18:38:24

RY-DA, RY-DB rail type voltage relay

[voltage relay]JY-DA,JY-DB Rail mounted voltage relay

2026-6-15 18:38:15

The JY series static rail type voltage relay (hereinafter referred to as this relay) is used as an overvoltage protection, undervoltage protection, or low-voltage interlocking starting element in relay protection devices for motors, generators, transformers, and transmission and transformation lines.

Normal working conditions
1. Environmental temperature: -10 �� to+50 ��.
2. Relative humidity: �� 90%.
3. Atmospheric pressure: 80Kpa to 110Kpa.
4. Installation location: Any.
5. Surrounding environment: It should have equipment to resist sunlight, rain, snow, wind, and sand; Explosive media are not allowed, and the air does not contain gases or conductive media that can cause metal corrosion or insulation damage; Relays are not allowed to have an external magnetic induction intensity exceeding 1.5mT, as well as strong vibrations and impacts during operation.

Main technical parameters of JY-DA and JY-DB rail type voltage relays

1. Voltage setting range: 0.1-99.9VAC, 1-240VAC, 40-440VAC.
2. Voltage adjustment level difference: 0.1V or 1V.
3. Time setting range: 0.05-9.99S, 0.1-99.9S, 1-999S.
4. Time adjustment level difference: 0.01S, 0.1S, 1S.
5. Return coefficient: overvoltage not less than 0.90, undervoltage not greater than 1.05.
6. Voltage error: The average error of voltage setting is ��± 3%, and the average error is calculated as (average of 5 measurements - setting value) divided by the setting value multiplied by 100%.
7. Delay error: The error within 10 seconds shall not exceed ± (1 ��+20ms), and the error after 10 seconds shall not exceed ± (1%+20ms)
8. Power consumption: The auxiliary power supply is less than 5VA; the starting power supply is less than 2.5VA.
9. Insulation resistance: The insulation resistance between the live terminals of the relay and the exposed non live terminals or the casing shall be measured with a megohmmeter with an open circuit voltage of 500V, and the insulation resistance shall not be less than 300M ��.
10. Dielectric strength: The live terminals of the relay can withstand an AC voltage of 2KV/50Hz between the exposed non live terminals or the casing, without breakdown or flashover for 1 minute.
11. Anti interference: Complies with the relevant regulations of DL478<>, GB7261<>, and GB6162<>.
12. Contact capacity: The relay contacts have a breaking capacity of 50 W in circuits with DC inductive loads (time constant of 5ms ± 0.75ms) with voltage not exceeding 250V and current not exceeding 1A, and a breaking capacity of 250VA in AC circuits with voltage not exceeding 250V and current not exceeding 2A (power factor of 0.4 ± 0.1). The contact connection capacity is DC250V/2A and AC250V/5A.
13. Contact life: electrical life 105 times, mechanical life 106 times.
14. Action time: When the overvoltage relay is 1.2 times the set value, the action time shall not exceed 25ms; when the undervoltage relay is 0.5 times the set value, the action time shall not exceed 20ms.
15. Return time: no more than 27ms.
16. Auxiliary power supply: AC/DC 24V, 48V, 110V, 220V, 380V; Please specify when placing an order, other voltage levels can be customized (AC/DC universal).
17. Starting power supply: 0.1-99.9VAC, 1-240VAC, 40-440VAC. Please specify when placing an order. Other voltage measurement ranges can be customized.
18. Delay time: 0.05-99.9S, 0.1-99.9S, 1-999S. Please specify when placing an order. Other delay ranges can be customized.

[voltage relay]DY-5 type positive sequence voltage relay

2026-6-15 18:38:07

DY-5 positive sequence voltage relay is used in the forced excitation protection circuit of the generator as a low-voltage starting element.
2. Technical data
Technical data of DY-5 positive sequence voltage relay

rated voltage		range of motion ��V��	return coefficient	Reliability coefficient	power consumption ��VA��	contact capacity ��W��
��V��	��Hz��
one hundred	fifty	58~113	��1.07	��2	twenty	fifty
one hundred and seventy-three		115~225			thirty-five

Note: The long-term operating voltage of the relay is 1.1 times the rated voltage.
3. Internal wiring
The internal wiring of DY-5 positive sequence voltage relay is shown in the figure.

4. Appearance and installation dimensions of DY-5 positive sequence voltage relay

DY-5 positive sequence voltage relay

[voltage relay]BGDJ-10 type DC voltage relay

2026-6-15 18:37:58

1. Purpose
Used for overvoltage and undervoltage detection or protection of various DC power sources in power stations or other occasions.
2. Structural characteristics
Composed of integrated circuits and discrete electronic devices. The shell structure adopts HK-1 (protruding rear wiring) and HK-1Q (protruding front wiring), which must be specified when ordering. The external dimensions and opening dimensions are detailed in the appendix of this manual.
3. Main technical data

*Model number	Name	*Um Fixed electricity Pressure (V)	Action value integer Defined scope (V)	power consume (W)	return coefficient	contact point form	Contact breaking capacity
							direct current Road (W)	alternating current Road (VA)
BGDJ-11/1	Overvoltage relay	one hundred and ten	121~132	��10	Overvoltage �� 0.9 undervoltage ��1.15	two transformation	220V 0.15A Moved thirty	220V 0.5A cos��= zero point four one hundred and ten
BGDJ-11/2	Undervoltage relay	one hundred and ten	80~99
BGDJ-12/1	Overvoltage relay	two hundred and twenty	242~264
BGDJ-12/2	Undervoltage relay	two hundred and twenty	176~198
BGDJ-13/1	Overvoltage relay	forty-eight	48~57
BGDJ-13/2	Undervoltage relay	forty-eight	40~44

4. Rear terminal wiring diagram

[voltage relay]JY-7G Voltage Relay

2026-6-15 18:37:49

The JY-7G series terminal block voltage relay is used in relay protection devices for generators, transformers, and transmission and transformation lines as an overvoltage protection or low-voltage lockout starting element

JY-7G Voltage Relay

[voltage relay]Integrated Circuit DC Voltage Relay

2026-6-15 18:37:41

JY-7D Integrated Circuit DC Voltage Relay

[voltage relay]JY-7 series without auxiliary power supply voltage relay

2026-6-15 18:37:32

JY-7 series without auxiliary power supply voltage relay

[voltage relay]JHY10,JHY20,JHY30 series integrated circuit voltage relay

2026-6-15 18:37:23

1. Application scope
The JHY series integrated circuit voltage relay (hereinafter referred to as the product) is used in relay protection devices for motors, transformers, and transmission lines as a starting element for overvoltage or low-voltage lockout. This product is an integrated circuit static relay with high precision, low power consumption, short action time, high return coefficient, intuitive and convenient setting. It overcomes the disadvantages of electromagnetic relays such as easy contact shaking, high working noise, difficult adjustment of action value return coefficient, and variable action value after input.

2. Main technical parameters
Auxiliary voltage AC 110V 220V 380V
Contact form: one normally open, one normally closed
Setting error: ��± 2%
Delay consistency: �� 2.5% of the set value
Return coefficient: overvoltage �� 0.9, undervoltage �� 1.2
Action time: �� 25ms when overvoltage is 1.2 times, �� 30ms when low voltage is 05 times
Return time: Overvoltage<30ms, low voltage<20ms
Power consumption: AC<2VA, DC<5W
Contact capacity: In a DC inductive load circuit with a voltage not exceeding 250V, a current not exceeding 5A, and a time constant of 5 ± 0.75ms, the output contact of the product has a breaking capacity of 50W. Under the specified load conditions, the output contact of the product can reliably operate and return 5 × 104 times. The long-term allowable current for the output contact is 5A.
Dielectric strength: The conductive terminals of the product are connected together and can withstand an AC voltage of 2000V (effective value) 50Hz for 1 minute between exposed non charged metal parts or shells without insulation breakdown or flashover.

Internal wiring of JHY10, JHY20, JHY30 series integrated circuit voltage relays

4. Appearance and opening size
1. Protruding fixed wiring housing

2. Protruding plug-in structure shell

3. Embedded plug-in structure shell

JHY10, JHY20, JHY30 series integrated circuit voltage relays

[voltage relay]JWY-60,70,80 series static voltage relay without auxiliary power supply

2026-6-15 18:37:15

JWY-60, The 70,80 series static voltage relays without auxiliary power supply are static relays composed of imported integrated circuits. The measured AC voltage U - after passing through an isolated inverter, a voltage Ui proportional to the measured current is obtained in its secondary. After setting a fixed value, it is rectified, and the rectified pulse voltage is filtered by a filter to obtain a DC voltage Uo proportional to Ui. In level detection, Uo is compared with the DC reference voltage Ue. If the DC voltage Uo is lower than the reference voltage, the level detector outputs a positive signal to drive the output relay, and the relay is in an active state. Conversely, if the DC voltage Uo is higher than the reference voltage Ue, the level detector outputs a negative signal, and the relay is in a non active state

Classification and meaning of relay models

JWY-60�� 70 and 80 series static voltage relays without auxiliary power supply

[voltage relay]BFY-10A series negative sequence voltage relay

2026-6-15 18:37:06

1. Application scope
The BFY-10A series negative sequence voltage relay (hereinafter referred to as the relay) is used in the relay protection lines of generators and transformers as a voltage blocking element to reflect the negative sequence component of the line voltage during asymmetric short circuits.
2. Main technical parameters
Rated voltage: AC 100V, 173V; 50Hz��60Hz�� DC 220V, 110V, 48V.
Negative sequence action line voltage setting range: 6-12V, with a variation not exceeding 6%.
The allowable variation range of DC transformer: 220V and 110V are allowed to vary within the range of 80% -110%, and for 48V, it is allowed to vary within the range of 90% -110%. The relay should work normally.
Power consumption: AC 100V/�� 5VA, 173V/�� 8VA; DC 220V/��6W��110V/��4W,48V/��2W��
Contact form: BFY-1lA type has one pair of dynamic contact points, BFY-12A type has one pair of dynamic contact points, and BFY-13A type has one pair of dynamic contact points and one pair of dynamic contact points.
BZY-1 positive sequence voltage relay

Internal wiring of BFY-10A series negative sequence voltage relay

4. Dimensions of BFY-10A series negative sequence voltage relay

BFY-10A series negative sequence voltage relay

[voltage relay]JY-3/1~2 voltage monitoring relay

2026-6-15 18:36:58

1. Application scope

JY-3/1-2 voltage monitoring relay is a specialized relay designed for DC power supply devices. When the main circuit voltage (i.e. control bus voltage) is 180-240V, it can monitor the undervoltage or overvoltage status of the main circuit, as well as the undervoltage status of the secondary circuit (i.e. closing bus circuit and charger circuit) within the range of 180-360V.

2. JY-3/1-2 type voltage monitoring relay model

3. Main technical parameters

Rated value: DC voltage rated value (connected to battery) 200V (�� is positive pole; �� For negative electrode)
Setting range: The voltage setting range for the main circuit (between terminals �� and ��, i.e. the control bus voltage) is 180-240V; the operating voltage setting range for the secondary circuit (between terminals ��, �� and ��, i.e. the charger voltage and the closing bus voltage) is 180-360V.
Action consistency: not greater than 3%.
Return coefficient: The return coefficient of the overvoltage circuit is not less than 0.95; The return coefficient of the undervoltage circuit is not greater than 1.05.
Action time: When the overvoltage circuit applies 1.1 times the set value, the action time is 1.5 seconds; when the excitation amount applied to the undervoltage circuit suddenly changes from the set value to 0.5 times the set value, the action time is 1.5 seconds.
Power consumption: When the rated value is applied to the power circuit, the power consumption of the product shall not exceed 15W (causing all relays to operate).
Contact capacity: In a DC inductive load circuit with a voltage not exceeding 250V, a current not exceeding 5A, and a time constant of 5 ± 0.75ms, the output contact of the product has a breaking capacity of 50W. Under the specified load conditions, the output contact of the product can reliably operate and return 5 × 104 times. The long-term allowable current for the output contact is 5A

4. Internal wiring

5. External dimensions and opening dimensions

JY-3/1-2 type voltage monitoring relay

[voltage relay]HY-10.20.30 series AC/DC static voltage relay

2026-6-15 18:36:49

1. Overview

HY series integrated circuit static voltage relays are used as starting components in overload short-circuit protection devices for motors, transformers, and transmission lines. This product is an integrated circuit static plow relay: electric
The device has high precision, low power consumption, short action time, high return coefficient, and intuitive and convenient setting. It overcomes the disadvantages of the original electromagnetic relay, such as easy shaking of contacts, high working noise, difficult adjustment of action value return coefficient, and variable action value after transportation. The product is divided into three series: HY-10, HY-20, HY-30, which can replace electromagnetic relays such as DJ-100, DY-20, DY-30, etc. respectively. At the same time, it also solves the unreliable disadvantages of the same type of JY-10, 20, 30, JY-1A, 1B, 1C, JY8-10, 20, 30 'energy instability, and large setting variation. Equipped with an auxiliary power supply, it has added dual-purpose functions for both AC and DC

2. HY-10.20.30 series AC/DC static voltage relay model

3. Main technical parameters

Auxiliary power supply: AC/DC dual-use 220V, 110V, 48V.
Contact form: one normally open and one normally closed, special contact forms can be customized.
Setting error: not greater than ± 2%.
Delay consistency: not greater than 2.5% of the set value.
Return coefficient: The overvoltage relay shall not be less than 0.9; The undervoltage is not greater than 1.2.
Action time: The action time of overvoltage relay at 1.2 times the setting value shall not exceed 25ms; the action time of low-voltage relay at 0.5 times the setting value shall not exceed 30ms.
Power consumption: AC circuit power consumption is less than 2VA; DC circuit power consumption is less than 5W.
Contact capacity: In a DC inductive load circuit with a voltage not exceeding 250V, a current not exceeding 5A, and a time constant of 5 ± 0.75ms, the output contact of the product has a breaking capacity of 50W. The output contact can reliably operate and return 5 x 104 times under the specified load conditions F. The long-term allowable current for connecting small contacts is 5A.
Dielectric strength: When the conductive terminals of the product are connected together, they can withstand an AC voltage of 2000V (effective value) 50tlz for 1 minute between exposed non charged metal parts or shells without any edge breakdown or flashover phenomenon.

4. Internal wiring diagram of the product

HY-10.20.30 series AC/DC static voltage relay

[voltage relay]BZY-1 series positive sequence voltage relay

2026-6-15 18:36:41

BZY-1 series positive sequence voltage relay

[voltage relay]JCDY-2A DC voltage relay

2026-6-15 18:36:32

JCDY-2A DC Voltage Relay

[voltage relay]DY-20CE series voltage relay

2026-6-15 18:36:23

DY-20CE series voltage relay

[voltage relay]LY-1A type voltage relay

2026-6-15 18:36:15

LY-1A Voltage Relay

[voltage relay]LY-30 series voltage relay

2026-6-15 18:36:06

LY-30 series voltage relay

[voltage relay]DY-32 type voltage relay

2026-6-15 18:35:57

DY-32 voltage relay is used in relay protection circuits as an overvoltage protection or low-voltage blocking component.

15-60V 50-200V 100-400V

DY-32 voltage relay

[voltage relay]DY-28 type voltage relay

2026-6-15 18:35:49

DY-28 voltage relay is used in relay protection circuits as an overvoltage protection or low-voltage blocking component.

12-48V,40-160V
80-320V

DY-28 voltage relay

[voltage relay]JY-31A type static voltage relay

2026-6-15 18:35:40

Suitable for use as an action component for overvoltage protection or low-voltage lockout in relay protection circuits.

Voltage setting range:
0.5�� 99.5V
220V,110V, 48V

JY-31A Static Voltage Relay

[voltage relay]JY-21A type static voltage relay

2026-6-15 18:35:31

The JY-21A static voltage relay is suitable for use in relay protection circuits as an action component for overvoltage protection or low-voltage lockout.

Voltage setting range:
0.5�� 99.5V
220V,110V, 48V

JY-21A Static Voltage Relay

[voltage relay]JY-11A type static voltage relay

2026-6-15 18:35:23

JY-11A static voltage relay is suitable for use in relay protection circuits as an action component for overvoltage protection or low-voltage lockout.

Voltage setting range:
0.5�� 99.5V
220V,110V, 48V

JY-11A Static Voltage Relay

[voltage relay]JY-36 type static voltage relay

2026-6-15 18:35:14

JY-36 static voltage relay is used in relay protection circuits as an overvoltage protection or low-voltage blocking component.

DC220V��110V��48V AC100V��200V

JY-36 Static Voltage Relay

[voltage relay]JY-40 series voltage relay

2026-6-15 18:35:06

1. Application scope
The JY-40 series voltage relay (abbreviated as F relay) is used in relay protection devices for generators, transformers, and transmission lines as a starting element for overvoltage protection or low-voltage lockout. This product is composed of integrated circuits. Has extremely high accuracy and return coefficient. And it has low power consumption and a wide setting range. When used as a low-voltage relay, there is no vibration, contact adhesion, or off-axis phenomenon. This relay adopts a digital dip switch for setting, which is intuitive and convenient, and has a high anti-interference ability and reliability. The product is divided into three series of relay housings: JY-40A, JY-40B, and JY-40C, which are the same as the DJ-100 series, DY-20C, and DY-30 series electromagnetic voltage relays, and fully consider the corresponding relationship of terminal wiring. Therefore, it is convenient to replace the already running DJ and DY series voltage relays.

2. Model number

3. Main technical parameters

Setting value error: not greater than 2.5%.
Consistency of action values: 1% for non major factories.
Return coefficient: overvoltage relay, U return coefficient �� 0.9 (can be selected between 0.85-1 according to user requirements); Low voltage relay return coefficient �� 1.15 (can be selected between 1.2-1 according to user requirements).
Action time: The action time of overvoltage relay at 1.1 times the measured action value is �� 40ms; the action time of low-voltage relay at 0.5 times the measured action value is<40ms
Power consumption: The power consumption of the AC circuit is not high at 0.5VA (at a rated voltage of 100V); the power consumption of the DC circuit is not greater than 4W
Contact capacity: In a DC inductive load with a voltage not exceeding 250V, a current not exceeding 5A, and a time constant of 5+0.75ms, the output contact of the product has a breaking capacity of 50W. The output contact can reliably operate and return 5 x 104 times under the specified load conditions. The long-term allowable current for the output contact is 5A
Dielectric strength: When the conductive terminals of the product are connected together, it can withstand a 2000V (effective value) 50Hz AC voltage for 1 minute without insulation breakdown or flashover between exposed non charged metal parts or shells.

Internal wiring of JY-40 series voltage relay

JY-40 series voltage relay

[voltage relay]JY-20C/30C series multi contact voltage relay

2026-6-15 18:34:57

JY-20C/30C series multi contact voltage relay

[voltage relay]JY-60,70,80 series static voltage relay

2026-6-15 18:34:48

JY-60, The 70,80 series static voltage relays are static relays composed of imported integrated circuits. The measured AC voltage U - after passing through an isolated inverter, a voltage Ui proportional to the measured current is obtained in its secondary. After setting a fixed value, it is rectified, and the rectified pulse voltage is filtered by a filter to obtain a DC voltage Uo proportional to Ui. In level detection, Uo is compared with the DC reference voltage Ue. If the DC voltage Uo is lower than the reference voltage, the level detector outputs a positive signal to drive the output relay, and the relay is in an active state. Conversely, if the DC voltage Uo is higher than the reference voltage Ue, the level detector outputs a negative signal, and the relay is in a non active state

JY-60, Classification and meaning of 70,80 series static voltage relay models

JY-60, 70,80 series static voltage relay

[voltage relay]JCDY,JCDY-2 series DC voltage relay

2026-6-15 18:34:39

JCDY, JCDY-2 series DC voltage relay (abbreviated as relay F) is used for overvoltage and undervoltage detection or protection of various DC power sources in power stations or other occasions
Protection can be used as a matching device for DC screens and cadmium nickel battery screens. This relay adopts an integrated operational amplifier circuit and an intermediate relay for the outlet. It has the characteristics of large output capacity, stable and reliable, sensitive action, small setting error, high return coefficient (overvoltage), good linearity, no noise, and uses digital dialing to set the action value. It is intuitive and convenient to use, making it an ideal replacement product for voltage measurement components in DC systems.

2. Main technical parameters

specification	protection method	Setting range (DC)
JCDY-2/G220V	Overvoltage protection	220-279V
JCDY-2/G220V	Long term pressure protection	180-220V
JCDY-2/G110V	Overvoltage protection	110-150V
JCDY-2/G110V	Long term pressure protection	80-110V
JCDY-2/G48V	Overvoltage protection	48-56V
JCDY-2/Q48V	Long term pressure protection	40-48V
JCDY-2/G20V Special Characteristics	Overvoltage protection	160-299V��280-320V

Rated DC voltage: 220V, 110V, 48V.
Return coefficient: overvoltage not less than 0.97; The undervoltage is not greater than 1.03.
Setting error: not greater than ± 2%.
Action time: Under normal conditions, the action time should not exceed 25ms;
Return time: Under normal conditions, the return time should not exceed 25ms;
Power consumption: not exceeding 10W.
Contact capacity: In a DC inductive load circuit with a voltage not exceeding 250V, a current not exceeding 5A, and a time constant of 5 ± 0.75ms, the output contact of the product has a breaking capacity of 50W. Under the specified load conditions, the output contact of the product can reliably operate and return 5 × 104 times. The long-term allowable current for the output contact is 5A

Internal wiring of JCDY and JCDY-2 series DC voltage relays

4. Appearance and opening size

A: Protruding fixed wiring housing;

B: Protruding plug-in structure shell 7.

C: Embedded plug-in structure shell 4

JCDY, JCDY-2 series DC voltage relay

[voltage relay]DY-4 type negative sequence voltage relay

2026-6-15 18:34:30

1 Overview
DY-4 negative sequence voltage relay (hereinafter referred to as relay) is used in the relay protection circuit of generators and transformers as a voltage blocking element, which reflects the negative sequence component of the line voltage in case of asymmetric faults.

2 Structure and principle
The relay consists of a negative sequence voltage filter (hereinafter referred to as the filter) and an electromagnetic mechanism as an actuator. The coil winding of the actuator is connected to the output circuit of the filter. The internal wiring diagram is shown in Figure 1.
The filter consists of two sets of resistors and two capacitors C1 and C2, RA=R1+��RC=R3+R4�� Among them, R2 and R4 are adjustable resistors, Xa=1/(2 �� fc1), Xc=1/(2 �� fc2). When the resistance value Ra=Sqrt (3) * Xa, Rc=Xc/Sqrt (3), a positive sequence voltage is applied to the input terminal of the filter, and the filter does not output (only a small unbalanced voltage); When a negative sequence voltage is applied to the input of the filter, the output voltage at no load is 1.5UL2 (UL2 is the negative sequence line voltage). Due to the addition of line voltage, there is no zero sequence voltage component.
By changing the pointer position of the executing element, the action value can be adjusted.
The relay is installed inside a metal casing with a transparent cover in front, embedded and mounted on a vertical panel.
The relay has an A22K structure, and its external dimensions, terminal diagram, and installation hole dimensions are shown in the attached figure

Figure 1 Internal wiring diagram

Technical data of DY-4 negative sequence voltage relay

3.1 Rated value: Line voltage 100, 173V, 50Hz.
3.2 Negative sequence action line voltage setting range: 6-12V, 10.4-20.8V.
3.3 The return coefficient shall not be less than 0.8.
When a symmetrical positive sequence 1.1 times the rated voltage is applied, the actuator of the relay should return to its original position.
3.5 Relays allow long-term application of 1.1 times the symmetrical positive sequence rated voltage.
3.6 The total power consumed by the relay at rated voltage shall not exceed 20VA.
When the voltage is not greater than 250V and the current is not greater than 2A, the breaking power of the contacts in a DC circuit with an inductive load and a time constant of 5 ± 0.75ms is 50W.
3.8 All circuits of the relay should undergo a test to withstand AC 50Hz, 2000V voltage, and a duration of 1 minute for the insulation of the casing.
The nominal values of the resistance and capacitance of the 3.9 filter, as well as the winding data of the actuator, are listed in Table 1.

Component symbols on the wiring diagram	Component Name	data
RA	resistor	1380��
Rc	resistor	920��
XA	capacitor	4��F400V
Xc	capacitor	2��F400V
J	Actuating element	Each coil has 3000 turns of 0.18-QQ enameled wire

4. Use and maintenance
4.1 Before using the relay, a mechanical inspection should be carried out, such as whether the screws and nuts are tightened, whether the movable system of the actuator rotates flexibly, and whether the balance spring and contact system work normally. Then, the relay action value is adjusted by changing the pointer position of the actuator, and the scale on the dial indicates the setting value of the negative sequence action line voltage. When testing with the method of simulating phase to phase short circuit, the operating voltage should be times the voltage of the negative sequence operating line. The simulation method is to short-circuit the two terminals of the simulated short circuit relay and apply a single-phase voltage between it and the non faulty phase terminal. At the same set point, the operating voltages for simulating phase to phase short circuits of AB, BC, and CA should be close to each other.
4.2 Negative sequence voltage filters and relays are already adjusted at the factory and generally do not require further adjustment. If it is found that the filter is unbalanced (there is a large unbalanced voltage at the output terminal when a symmetrical positive sequence voltage is applied), it can be adjusted according to the following regulations:
a. Adjust at rated frequency of 50Hz and when the voltage waveform is a sine wave;
b. Unscrew the terminal �� screw and disconnect the connection circuit between the filter and the actuator. Apply a symmetrical positive sequence rated voltage to the input terminal of the filter, adjust the adjustable resistors R2 and R4, so that the minimum unbalanced voltage on the output terminal is not more than 1.5V at a rated voltage of 100V and not more than 2.6V at 173V. When measuring the unbalanced voltage, a vacuum tube voltmeter or a high internal resistance AC voltmeter should be used.
If it is difficult to apply symmetrical positive sequence voltage, single-phase voltage can also be added for adjustment. First, apply 100V AC voltage to the A and B phase terminals (��, ��), adjust R2 so that the voltage UC1 on capacitor C1 is 50V and the voltage URA on resistor RA is 86.6V; Then apply 100V AC voltage to the B and C terminals (��, ��), adjust R4 to make UC2=86.6V and URC=50V. High precision vacuum tube voltmeters or high internal resistance AC voltmeters should be used to measure voltage.
c. Tighten the terminal �� screw to connect the output end of the filter and the coil of the actuator. If conditions permit, apply symmetrical positive sequence voltage and check the operation of the relay according to technical requirement 3.4.
When adjusting the actuator components, separate AC voltage adjustment should be applied to the coil winding, the reaction torque of the balance spring, and the stop screw to adjust its own operating voltage. The rated voltage is 100V ground, the minimum setting point is 10V, the maximum setting point is 20V, and the minimum setting point for 173V turns is 18V and the maximum setting point is 36V. The return coefficient is not less than 0.8. If necessary, the contact position can be adjusted appropriately, but it is necessary to ensure that the contact operates normally and reliably.

5 Ordering Instructions
When placing an order, please specify:
5.1 Product Model and Name
5.2 Order quantity.
5.3 Rated value.

attached figure

DY-4 type negative sequence voltage relay

[voltage relay]DY-30/Z type voltage relay

2026-6-15 18:34:22

1 Overview

1.1 Purpose
The DY-30/Z (DY-35/Z, DY-36/Z, DY-37/Z, DY-38/Z) voltage relay (hereinafter referred to as the product) is mainly used in power system relay protection lines as an action component for low-voltage interlocking.

1.2 Specifications and Setting Range are shown in Table 1 below

Product model

rated voltage

(Parallel)

Setting value point 1

Setting value point 2

Setting value point 3

Setting value point 4

Setting value point 5

Setting range

parallel connection

series connection

parallel connection

series connection

parallel connection

series connection

parallel connection

series connection

parallel connection

series connection

parallel connection

series connection

DY-35��Z

thirty

one hundred

two hundred

twelve

twenty-four

fifteen

thirty

eighteen

thirty-six

twenty-one

forty-two

twenty-four

forty-eight

12~24

24~48

DY-36��Z

forty

eighty

fifty

one hundred

sixty

one hundred and twenty

seventy

eighty

one hundred and sixty

40~80

80~160

DY-37��Z

eighty

one hundred and sixty

one hundred

two hundred

one hundred and twenty

two hundred and forty

one hundred and forty

one hundred and sixty

three hundred and twenty

80~160

160��32C

DY-38��Z

Structure and Characteristics of DY-30/Z Voltage Relay
This product has a plug-in structure, embedded installation, and a transparent plastic cover, which allows easy observation of the voltage setting value and specifications of the product. The installation method is also a protruding installation, and the structural forms are A11K, A11H, A1lQ. The external dimensions and installation dimensions of the product are shown inAppendix II.
The plug-in structure is easy to adjust and maintain. When the product leaves the factory, the factory provides a complete set of parts for installation and wiring, as well as spare parts supplied according to the contract.

3 Principles of Action
This product adopts the rectification principle, and the magnetic system has two coils. The coil heads are connected to the output terminals of the rectifier bridge, and the two input terminals of the rectifier bridge are connected to the base terminals ��, ��, ��, and ��. Users can connect them in series or parallel as needed, thus doubling the setting range of the product.
The scale and rated values on the product nameplate are obtained when the coils are connected in parallel. By rotating the pointer on the dial, the mechanical reaction torque of the balance spring can be changed, thereby altering the operating value of the product.
The internal wiring diagram of the product is shown in Figure 1, and the terminal wiring diagram is shown in Figure 2.

Figure 1 Internal wiring diagram

DY-35/Z

DY-36/Z

DY-37/Z

DY-38/Z

Figure 2 Terminal Wiring Diagram

4 Electrical and working principles of the product
4.1 Electrical Principles
Electrical schematic diagram and internal wiring diagram
Among them: C1 C3- used as a voltage reducing component
C2 C4- Used as a filter
D1 D2- Improve return coefficient
4.2 Working principle
After rectification and filtering, the AC voltage is applied to both ends of the coil of the electromagnetic voltage relay. The electromagnetic torque generated by the coil is compared with the reaction torque of the balance spring and acts accordingly. Due to the rectification and filtering of the AC voltage, the zero crossing of the voltage is avoided, resulting in the electromagnetic torque generated due to the shaking phenomenon caused by the zero crossing of the voltage, which improves the reliability of the voltage relay operation.

Main specifications of DY-30/Z voltage relay

5.1 The return coefficient of the product shall not exceed 1.25.
5.2 The consistency of product operating voltage shall not exceed 5%.
5.3 The action time of the product shall not exceed 0.15s, that is, the action time when the working voltage is 0.5 times the set voltage shall not exceed 0.15s.
The setting value error of the product shall not exceed ± 5%.

Wiring, debugging, and required instruments for 6 products
6.1 Required instruments: one AC voltmeter (0.5 level) and one AC voltage regulator.
6.2 Wiring and Debugging
a) The wiring diagram is shown in Figure 3
b) Debugging: Start from the minimum setting value, that is, first point the pointer to the minimum setting value, check that the wiring is correct, and adjust the voltage regulator to zero, connect the power supply, adjust the voltage regulator to gradually increase its voltage above the setting value, then slowly reduce the voltage to observe its action, record the action value, and then increase the voltage to record the return voltage, so as to calculate the return coefficient. Then point the pointer to the set values of the second, third, fourth, and fifth o'clock. Debugging as above.

Figure 3 Test wiring diagram

Working conditions of 7 products
7.1 The ambient temperature is -25 to 40 ��;
7.2 Atmospheric pressure: 80-10kPa;
7.3 Relative temperature; The monthly average maximum relative humidity of the wettest month is 90%, and the monthly average minimum temperature of that month is 25 ��, with no visible dew on the surface. When the maximum temperature is 40 ��, the average maximum relative humidity does not exceed 50%.
The vibration response and impact response at the usage location shall not exceed the severity level I specified in Article 5.10.4 and 5.10.5 of ZBK45020-90 "General Technical Conditions for Automatic Relays and Devices for Power System Protection".
7.5 The usage location should have protective facilities against wind, snow, rain, and sand, and should be free of corrosive and explosive gases.

8 Use and maintenance
Before using the relay, the outer shell needs to be removed and checked for any damage that may have occurred during transportation, such as the moving plate touching the magnetic plate, the spring coils touching each other, friction on the moving plate shaft, etc. To do so, set the pointer of the relay to the first setting point, move the movable system towards the magnetic plate by hand, and then release it. The movable system should return to its original equilibrium position until the stop, and then make necessary adjustments and settings.
When readjusting the relay, it must be ensured that:
The axial movement of the movable system is between 0.15 and 0.3mm.
8.2 The air gap between the moving piece and the magnetic pole should ensure that the relay does not collide with the moving piece and the magnetic pole under any specified conditions.
During the operation of a relay with dynamic contact and dynamic break contact, the bridge shaped contact shall not simultaneously contact the dynamic contact and dynamic break contact.
When the pointer rotates from the first scale value to the final scale value, the coils of the balance spring must not touch each other.
When the relay is activated, the bridge shaped contact should slide on the centerline of the static contact with a tolerance of ± 1mm, and the total air gap between the dynamic and static contacts should not be less than 2mm.
The distance between the static contact point and the limiting plate shall not exceed 0.3mm.
8.7 It is not advisable to lubricate the shaft and bearings of the relay.
8.8 It is not allowed to clean the contacts with sandpaper or other rough materials. It is recommended to use a sharp blade or a clean fine grinding stone to clean the contacts, and then wipe them clean with a soft cloth to avoid touching the contacts with fingers.

9. Complete set of supply
Together with each relay. The factory should provide complete sets of:
9.1 One copy of the certificate of conformity;
9.2 One user manual (one for the same batch of orders from the same user)
9.3 Spare parts that should be provided as stipulated in the contract;
9.4 Complete set of components for installing wiring.

10 Ordering Instructions
Please specify when placing an order
10.1 Product model and name;
10.2 Order quantity.
10.3 Maximum setting value.

[voltage relay]DY-30 series voltage relay

2026-6-15 18:34:13

1 Purpose
DY-30 series voltage relay is used in relay protection circuits as an action component for overvoltage protection or low-voltage lockout.

2 Structure and principle
2.1 The relay is electromagnetic and operates instantaneously. The magnetic system has two coils, with the coil heads connected to the base terminals. Users can connect the coils in series or parallel as needed, thus doubling the setting range of the relay.
2.2 The scale value and rated value of the relay nameplate are sufficient for parallel connection of coils (in V units). Rotate the pointer on the dial to change the reaction torque of the balance spring, thereby changing the action value of the relay.
2.3 Relay action: For overvoltage relays, when the voltage rises to or exceeds the set value, the relay will act, closing the contact and disconnecting the contact. When the voltage drops to 0.8 times the set value, the relay returns, the dynamic contact opens, and the dynamic contact closes. For low-voltage relays, when the voltage drops to the set voltage, the relay acts, the dynamic contact opens, and the dynamic contact closes.
2.4 Relays have three structures: A11K, A11H, and A1lQ, as shown inAppendix II.
The internal wiring diagram of the 2.5 relay is shown in Figure 1.
2.6 Weight of relay: approximately 0.6kg.

The above figure is as follows:
DY-32.36 DY-33.37 DY-34.38
DY-31.35 DY-32��60C DY-34��60C
Figure 1 Internal wiring diagram of DY-30 series current relay (back view)

Technical data of DY-30 series voltage relay
3.1 The number of contacts is shown in Table 1.

model	Number of contact points
model	Normally Open	normally closed
DY-31��35	one
DY-32��36	one	one
DY-33��37	two	one
DY-34��38	one	two
DY-32/60C	one	one
DY-34/60C	one	two

3.2 Divided by the range of setting values: The action error of the setting values shall not exceed ± 6%, and various technical data of the relays are shown in Table 2.

model	Maximum setting Voltage (V)	Rated voltage (V)		Long term allowable voltage (V)		Voltage setting Range (V)	Action voltage (V)
model	Maximum setting Voltage (V)	Parallel connection of coils	Coil series connection	Parallel connection of coils	Coil series connection	Voltage setting Range (V)	Parallel connection of coils	Coil series connection
DY-32/60C DY-34/60C		one hundred	two hundred	one hundred and ten	two hundred and twenty	15~60	15~30	30~60
DY-31 DY-32 DY-33 DY-34	sixty	thirty	sixty	thirty-five	seventy	15~60	15~30	30~60
	two hundred	one hundred	two hundred	one hundred and ten	two hundred and twenty	50~200	50~100	100~200
	four hundred	two hundred	four hundred	two hundred and twenty	four hundred and forty	100~400	100~200	200~400
DY-35 DY-36 DY-37 DY-38	forty-eight	thirty	sixty	thirty-five	seventy	12~48	12~24	24~48
	one hundred and sixty	one hundred	two hundred	one hundred and ten	two hundred and twenty	40~160	40~80	80~160
	three hundred and twenty	two hundred	four hundred	two hundred and twenty	four hundred and forty	80~320	80~160	160~320

Note: DY-32/60C and DY-34/60C specifications are long-term thermal stable (with built-in series capacitors) voltage relays.

3.3 Relay scale phase limit error: not greater than 6%.
3.4 Variation of action values: not greater than 6%.
The return coefficient for voltage relays DY-31, 32, 33, and 34 shall not be less than 0.8; DY-35�� The return coefficient of low voltage relays 36, 37, and 38 shall not exceed 1.25.
3.6 Action time
3.6.1 For overvoltage relays
At 1.1 times the action value, the action time should not exceed 0.12s; at 2 times the action value, the action time should not exceed 0.04s.
3.6.2 For low voltage relays
When the working voltage of the relay is 0.5 times the set voltage, the action time shall not exceed 0.15 seconds.
3.7 Overvoltage capability: When the coils are connected in parallel, the voltage should be uniformly raised from zero to 1.05-2.2 times the set voltage at the minimum setting value. Within this range, the relay should not have any vibration that would cause the dynamic contact to malfunction. After this test, the relay should still meet the technical requirements.
3.8 Overvoltage: When applying 1.75 times the set value or higher, the dynamic contact of the relay should close without shaking.
3.9 When there are no external collisions or vibrations. When the working voltage at each setting position of the overvoltage relay (except for the first point) is 0.6 times the setting value, its dynamic breaking contact should reliably close the circuit.
When the working voltage of a low voltage relay is 0.6 times the set voltage or lower, its dynamic breaking contact should close without shaking.
3.11 When there is no external collision or vibration, the working voltage at each setting position of the low-voltage relay should not be less than 1.5 times the setting voltage, and its dynamic contact should reliably close the circuit.
3.12 Under the operating voltage and return voltage; The movable system of the relay should not be stuck in the middle position.
When the relative humidity of the surrounding air is not greater than 85%, the insulation resistance of the relay circuit to the shell (non-conductive metal part on the shell) should not be less than 300M12 when measured with a 500V megohmmeter.
3.14 The insulation of the conductive part of the relay to the shell (non-conductive metal part on the shell) can withstand a test of 50Hz AC voltage 2kV for 1 minute.
3.15 Contact breaking capacity: When the voltage is not greater than 250V and the current is not greater than 2A, the breaking power of the contact is 50W in a DC circuit with inductive load (time constant not greater than 5 × 10-3s) and 250VA in an AC circuit.
3.16 Power consumption: At the minimum setting value, the power consumed by the coil of the relay shall not exceed the data in Table 5.
When the temperature of the surrounding medium is+40 ��, the relay can operate for a long time under the long-term allowable current and voltage shown in Table 2 and Table 3 without damage to insulation and other electrical components, and the temperature rise of the coil is not greater than 60K.
3.18 Lifespan: The relay has an electrical lifespan of 500 times and a mechanical lifespan of 5000 times.

4. Use and maintenance
4.1 To use a relay, remove the casing, pull out the machine, and check for any damage that may have occurred during transportation, such as contact between the rotor and the magnetic plate, contact between the coils of the balance spring, friction on the rotor shaft, etc. To do so, set the pointer of the relay to the first fixed point, manually rotate the movable system in the direction of the magnetic plate, and then release it. The movable system should return to its original position until it stops, and then make necessary adjustments and settings.
When readjusting the relay, it must be ensured.
4.2.1 The axial movement of the movable system is between 0.15 and 0.3mm.
4.2.2 The air gap between the moving piece and the magnetic pole should ensure that the moving piece and the magnetic plate do not collide under any specified working conditions of the relay.
4.2.3 Relays with dynamic contact points and dynamic contact points shall not have bridge shaped contacts simultaneously make contact with dynamic contact points and dynamic contact points during operation.
4.2.4 When the pointer rotates from the first scale value to the final scale value, the coils of the balance spring do not touch each other.
When the relay is activated, the bridge shaped contact should slide on the centerline of the static contact (tolerance ± 1mm), and the total air gap between the dynamic and static contacts should not be less than 2mm.
The distance between the static contact point and the limiting plate should not exceed 0.3mm.
4.2.7 When adjusting the action value of the relay, the adjustment of the minimum setting value mainly involves changing the magnitude of the spring reaction force, while the adjustment of the maximum setting value mainly involves changing the air gap between the rotor and the magnetic plate.
4.2.8 Relay shafts and bearings should not be lubricated.
4.2.9 It is not allowed to clean the contacts with sandpaper or other rough materials. It is recommended to use a sharp blade or a clean fine grinding stone to clean the contacts, and then wipe them clean with a clean, soft cloth to avoid touching the contacts with fingers.

5 Ordering Instructions
5.1 Product model and name;
5.2 Maximum setting value (current or voltage)
5.3 Order quantity.

[voltage relay]DJ-100A/Q series voltage relay

2026-6-15 18:34:04

1 Purpose
The DJ-100A/Q series voltage relay is a secondary voltage circuit rectifier type protection relay used in relay protection device circuits as an action element for low voltage lockout or overvoltage protection.
The DJ-100A/Q series is an improved product of the DJ-100 series voltage relay, which eliminates the jitter phenomenon that existed in the original voltage relay. Improved safety and reliability during use.

2. Structure and Operating Principles
2.1 Relay system electromagnetic instantaneous action, AC voltage resistance voltage reduction and rectification are applied to the two coils of the magnetic system. The wiring head is located on the terminal of the relay base, and a special connecting piece can be used to connect the coils in series or parallel, thus doubling the setting range of the relay.
2.2 As the relay is a rectifier type, it solves the bearing wear caused by the vibration of the movable system itself in the DJ-100 voltage relay.
2.3 The relay is embedded and the main body is a plug-in structure.
The internal wiring diagram of the 2.4 relay is shown in Figure 1.
The appearance and installation dimensions of the 2.5 relay are shown in Figure 2.

Figure 1 Internal wiring diagram of DJ-100A/Q series voltage relay (back view)
According to this, DJ-111 11A/Q DJ-121 122A/Q DJ-131 132A/Q 131A/Q160CN DJ-131A/Q160C

Figure 2: Outline and Installation Dimensions of DJ-100A/Q Series Voltage Relays

3 Technical Requirements
3.1 Contact opening capacity: When the voltage is �� 220V and the current is not greater than 2A, it is 50W in DC current with inductive load (time constant T is not greater than 5 × 10-3S); 250VA in AC circuit.
3.2 Action time: For overvoltage relays, the action time should not exceed 0.12s when the setting value is 1.1 times; 0.04s when the setting value is 2 times; and 0.15s when the setting value is 0.5 for low-voltage relays.
The insulation of the conductive part of the relay to the housing should withstand a test of AC 50Hz, voltage 2kY, for 1 minute.
3.4 The weight of the relay is approximately 1kg.
The partial technical data of the 3.5 relay is listed in the table below.

model	Setting range ��V��	Long term allowable voltage (V)		Contact specifications		return coefficient	power consumption (At the minimum set voltage) ��VA��	remark
model	Setting range ��V��	Coil series connection	Parallel connection of coils	Dynamic combination	Dynamic interruption	return coefficient	power consumption (At the minimum set voltage) ��VA��	remark
DJ��11lQ	15~60 50~200 100~400	seventy two hundred and twenty four hundred and forty	thirty-five one hundred and ten two hundred and twenty	one		0��8 0��8	one	overvoltage relay
DJ��12lQ	15~60 50~200 100~400	seventy two hundred and twenty four hundred and forty	thirty-five one hundred and ten two hundred and twenty		l
DJ��13lQ	15~60 50~200 100~400	seventy two hundred and twenty four hundred and forty	thirty-five one hundred and ten two hundred and twenty	one	one
DJ-131A��Q60C DJ��131Q��60CN	15~60 15~60	two hundred and twenty two hundred and twenty	one hundred and ten one hundred and ten	one	one		l
DJ��112Q	12~48 40~160 80~320	seventy two hundred and twenty four hundred and forty	thirty-five one hundred and ten two hundred and twenty	one		1��25	one	low voltage relay
DJ��122Q	12~48 40~160 80~320	seventy two hundred and twenty four hundred and forty	thirty-five one hundred and ten two hundred and twenty		one
DJ��132Q	12~48 40~160 80~320	seventy two hundred and twenty four hundred and forty	thirty-five one hundred and ten two hundred and twenty	one	one

4 Ordering Instructions
4.1 Model and name of relay.
4.2 Maximum setting value (current or voltage).
4.3 Number of relays.

[voltage relay]DJ-100Q series voltage relay

2026-6-15 18:33:55

1 Purpose
The DJ-100Q system voltage relay is used in relay protection device circuits as an action component for overvoltage protection or low voltage lockout.

2. Structure and Operating Principles
2.1 The DJ-LOOQ series voltage relay adopts embedded installation, and the main body of the relay is a plug-in structure.
The main body of the DJ-100Q series voltage relay is identical to that of the DJ-100 series voltage relay.
2.3 Relay system electromagnetic instantaneous action, magnetic system has two coils, the coil head is connected to the terminal of the relay base and the bottom terminal of the housing with a special connecting piece, which can connect the coils in series or parallel, thus doubling the setting range of the relay.
The internal wiring diagram of the DJ-100Q series voltage relay is shown in Figure 1.
The appearance and installation dimensions of the DJ-100Q series voltage relay are shown in Figure 2.

DJ-111Q112Q DJ-121Q122Q DJ-131Q132Q DJ-131��60CQ DJ-131��60CNQ
Figure 1 Internal wiring diagram of DJ-100Q series voltage relay (back view)

Figure 2: Outline and Installation Dimensions of DJ-100Q Series Intermediate Relays

3 Technical Requirements
3.1 Disconnecting capacity of contacts: When the voltage is below 220V and the current is not greater than 2A, it is 50W in DC circuits with inductive loads (time constant T not greater than 5 × 10-3S); 250VA (COS ��=0.4) in AC circuits.
3.2 Action time: For overvoltage relays, the action time should not exceed 0.12s at 1.1 times the set value, and 0.04s at 2 times the set value. When the low voltage relay is at 0.5 times the set value, the action time shall not exceed 0.15 seconds.
3.3 Dielectric Strength: The insulation of the outer shell of the conductive part of the relay should withstand a test of AC 50Hz, voltage 2kV, and duration of 1min.
The weight of the relay is approximately 1.5kg.
The technical data of the DJ-100Q series voltage relay is listed in the table.

model	Setting range ��V��	Long term allowable voltage (V)		Contact specifications		return coefficient	Power consumption (at minimum set voltage) (VA)	remark
model	Setting range ��V��	Coil series connection	Parallel connection of coils	Dynamic combination	Dynamic interruption	return coefficient	Power consumption (at minimum set voltage) (VA)	remark
DJ��11lQ	15~60 50~200 100~400	seventy two hundred and twenty four hundred and forty	thirty-five one hundred and ten two hundred and twenty	one		0��8	one	overvoltage relay
DJ��12lQ	15~60 50~200 100~400	seventy two hundred and twenty four hundred and forty	thirty-five one hundred and ten two hundred and twenty		l
DJ��13lQ	15~60 50~200 100~400	seventy two hundred and twenty four hundred and forty	thirty-five one hundred and ten two hundred and twenty	one	one
DJ��131Q��60C	15~60	two hundred and twenty	one hundred and ten	one	one		l.5
DJ��112Q	12~48 40~160 80~320	seventy two hundred and twenty four hundred and forty	thirty-five one hundred and ten two hundred and twenty	one		one point two five	one	low voltage relay

4 Ordering Instructions
4.1 Model and name of relay.
4.2 Maximum setting value (current or voltage).
4.3 Number of relays.

[voltage relay]DJ-100 series voltage relay

2026-6-15 18:33:47

1 Purpose
The DJ-100 series voltage relay is used in relay protection device circuits as an action component for overvoltage protection or low-voltage lockout.

Overview of Structure 2
The DJ-100 series voltage relay is an electromagnetic instantaneous action. AC voltage is applied to the two coils of the system, and the wiring head is on the terminal of the relay base. With a special connecting piece, the coils can be changed from parallel to series, which can double the setting range of the relay.
The DJ-100 series relay is installed on a vertical panel and can be wired in front of or behind the board. The internal wiring diagram of the relay is shown in Figure 1.

According to this
DJ-111,112 DJ-121,122 DJ-131-132
DJ-131/60CN FZ-2 DJ-131/60C
Figure 1 Internal wiring diagram of DJ-100 series relay (back view)

3 Technical data
3.1 Disconnecting capacity of contacts: When the voltage is not greater than 220V and the current is not greater than 2A, it is 50W in DC circuits with inductive loads (time constant T not greater than 5 × 10-3S); in AC circuits (COS ��=0.4), it is 250VA
3.2 Action time: For overvoltage relays, the action time should not exceed 0.12s at 1.1 times the set value; for overvoltage relays, the action time should not exceed 0.04s at 2 times the set value; and for low-voltage relays, the action time should not exceed 0.15s at 0.5 times the set voltage.
3.3 Insulation strength: The various circuits of the relay should withstand AC 50Hz, voltage 2kV, and a 1-minute test without breakdown or flashover between the exposed non charged metal parts.
The weight of the relay is approximately 1.5kg

The other main technical data of the 3.5 voltage relay are listed in Table 1.

model

Setting range

��V��

Long term allowable voltage (V)

Contact specifications

return

coefficient

power consumption

(At the minimum set voltage)

��VA��

remark

coil

series connection

coil

parallel connection

move

combine, synthesize

move

sever

DJ��11l

15-60

50-200

100-400

seventy

two hundred and twenty

four hundred and forty

thirty-five

one hundred and ten

two hundred and twenty

one

zero point eight

one

overvoltage

relay

DJ��12l

15-60

50-200

100-400

seventy

two hundred and twenty

four hundred and forty

thirty-five

one hundred and ten

two hundred and twenty

DJ��13l

15-60

50-200

100-400

seventy

two hundred and twenty

four hundred and forty

thirty-five

one hundred and ten

two hundred and twenty

one

DJ-131��60C

DJ��131��60CN

15-60

two hundred and twenty

one hundred and ten

one

l.5

DJ��112

12-48

40-160

80-320

seventy

two hundred and twenty

four hundred and forty

thirty-five

one hundred and ten

two hundred and twenty

one

one point two five

one

low voltage

relay

DJ��122

12-48

40-160

80-320

seventy

two hundred and twenty

four hundred and forty

thirty-five

one hundred and ten

two hundred and twenty

one

DJ��132

12-48

40-160

80-320

seventy

two hundred and twenty

four hundred and forty

thirty-five

one hundred and ten

two hundred and twenty

one

DJ-100 series relay external dimensions

DJ-100 series relay opening size

4 Ordering Instructions
4.1 Relay model and name.
4.2 Maximum setting value.
4.3 Wiring methods (front board wiring, back board wiring) If not specified, accessories for back wiring shall be supplied.
4.4 DJ-131/60C should also be ordered with an external resistance box FZ-2.

[voltage relay]JY-2 type DC high and low voltage relay

2026-6-15 18:33:38

Purpose:
JY-2 type DC high and low voltage relay is a DC voltage automatic adjustment test component, which can be used in conjunction with DC, nickel barrier battery screens, etc.

Relay model name:
Note: Structure code "T" refers to the protruding plug-in structure (i.e. 20 structure), structure code "Q" refers to the embedded plug-in structure (i.e. 30 structure), and if the structure code is not written, it defaults to the protruding structure (i.e. 10 structure).

Working Principle:
Under normal circumstances, if the output voltage of the high-value setting circuit is less than the threshold voltage, relay J1 will not operate and the indicator light will not light up. If the output voltage of the low value setting circuit is not greater than the threshold voltage, relay J2 will operate and the dynamic breaking contact will disconnect, and the indicator light will not light up.
When the monitored output voltage changes beyond the setting range of the relay (too high or too low), the dynamic closing (high value) or dynamic breaking (low value) contact of the relay connects the control circuit and sends a signal, that is, the output voltage of the high-value setting circuit is greater than the threshold voltage, the dynamic closing contact closes, the indicator light is on, and the output voltage of the low value setting circuit is not less than the threshold voltage, the dynamic breaking contact closes, and the indicator light is on.

Usage:
The high and low values of the relay can be set separately through the dial switch on the panel. According to the setting formula on the panel, they can be adjusted within the specified setting range of the relay (with an adjustment amplitude of not less than 1V). The dial switch corresponds to the ten and one positions in the setting formula.

Main technical parameters of JY-2 DC high and low voltage relay:
5.1 Rated DC voltage: 110V, 220V.
5.2 Action Setting Range
Rated DC voltage 110V: high value 110V-149V, low value 80V-109V;
Rated DC voltage 220V: high value 220V -260V, low value 190V -220V.
5.3 Action time: When twice the action value, the action time should not exceed 20ms.
5.4 Fixed value error: not greater than ± 2%
5.5 Return coefficient: The high value is not less than 0.97, and the low value is not greater than 1.02.
5.6 Power consumption: At rated voltage, the power consumption of the relay shall not exceed 6W.
5.7 Contact Performance
When the time constant is 5ms for an inductive load, the breaking capacity of the relay contacts is not greater than 2A for AC voltage of 250V, and not greater than 5A for DC voltage of 24V.
5.8 Working conditions
a) Atmospheric pressure ranging from 80kPa to 106kPa;
b) Environmental temperature -10 �� -+50 ��
c) The relative humidity of the air shall not exceed 90% (monthly average minimum temperature of 20 ��);
d) Strong external magnetic induction intensity is not allowed in the place of use;
e) The place of use does not allow conductive dust or corrosive gases that damage metals and insulation;
f) The place of use does not allow explosive hazards or media filled with dust;
g) The place of use does not allow the presence of severe mold;
h) Strong vibrations and impacts are not allowed in the usage area;
i) The place of use should have rain, snow, wind and sand protection devices and not be filled with water vapor.
5.9 Insulation resistance
The insulation resistance between the relay housing and each terminal, as well as between electrically unrelated circuits, shall not be less than 300M ��.
5.10 Dielectric Strength
The insulation strength between the relay housing and each terminal, as well as between electrically unrelated circuits, should be able to withstand an AC voltage of 2kV, 50Hz for 1 minute without flashover or breakdown. The same group of contacts should be able to withstand 1kV, 50Hz AC voltage for 1 minute without flashover or breakdown.
5.11 Anti interference performance
Compliant with GB7261 and GB6261 "Electrical Interference Test for Static Relays and Protection Devices".

Wiring diagram behind the relay:
The contacts in the picture are in a relay power-off state

Relay external dimensions and opening dimensions:
JY-2A is shown in Figure 1 of the General Structural System;
JY-2A/T is shown in Figure 3 of the General Structural System;
JY-2A/Q is shown in Figure 7 of the General Structural System.

Ordering instructions:
8.1 Relay name and model.
8.2 DC rated voltage (if there are special requirements, please specify separately).
8.3 If the contact form is a special requirement, please specify it separately.
8.4 Order quantity.
8.5 If necessary, the current high and low voltage relay can be modified, with the same setting range and usage method as the DC high and low voltage relay.

[voltage relay]BY-4A type voltage relay

2026-6-15 18:33:29

Purpose:
This relay is a small rated overvoltage relay used in ultra-high voltage protection circuits as a blocking element for directional lateral deviation.

Working Principle:
2.1 The relay consists of a voltage transformer YH, rectification and filtering circuit, trigger circuit, and actuator components.
2.2 Under normal circumstances, the relay conducts BG1, cuts off BG2, and the actuator does not operate. When the applied AC voltage is greater than the setting value of the relay, the trigger flips, that is, BG1 is turned off, BG2 is turned on, and the executing component acts, causing the dynamic contact to close and the dynamic contact to open, completing the relay function.
2.3 The setting of the relay action voltage is achieved using potentiometer R8.
The BY-4A voltage relay has a protruding plug-in structure (T-shaped).
The schematic diagram of the 2.5 BY-4A voltage relay is shown in Figure 1.

Main technical parameters:
3.1 AC rated value: 110V, 50Hz.
3.2 DC rated voltage: 220V, 110V, 48V.
3.3 Setting range: 2-15V.
3.4 Return coefficient: not less than 0.85.
3.5 Action time: The action time at 1.2 times the set point shall not exceed 0.04 seconds.
3.6 Action value variation: Any set value should not exceed 6%.
3.7 DC voltage variation: It is allowed to vary within the range of 80-110% at 220V and 110V, and within the range of 90-110% at 48V. The relay should be able to work normally.
3.8 When the ambient temperature is -10. ~+50. When the range changes, the difference between the action value of the relay at any set point and the action value at a temperature of+20 �� should not exceed ± 10% of the latter.
3.9 Contact form: one pair of movable contacts, one pair of movable contacts.
3.10 Contact breaking capacity: In a DC inductive load current with a voltage not exceeding 220V and a current not exceeding 0.2A (time constant not exceeding 5 × 10-3s), the breaking capacity is 25W, and in an AC circuit it is 30VA.
3.11 Electrical lifespan: 5000 cycles.
3.12 Power consumption: Under rated voltage, the AC circuit power shall not exceed 6VA;
DC circuit 220V not exceeding 6W;
110V not exceeding 4W;
48V is not greater than 2W.
3.13 Weight: Approximately 1kg.

Wiring diagram behind the relay:
The internal wiring diagram of BY-4A voltage relay is shown in Figure 2.

Relay external dimensions and opening dimensions:
The appearance and installation dimensions of BY-4A voltage relay are shown in Figure 4 of the universal structural system.

Ordering instructions:
4.1 Relay name, model, and quantity.
4.2 DC rated voltage.

[voltage relay]BFY series negative sequence voltage relay

2026-6-15 18:33:21

Purpose:
BFY-11�� 12. The 13 negative sequence voltage relay is used in the relay protection circuit of generators and transformers as a voltage blocking element to reflect the negative sequence component of voltage during asymmetric short circuits.

Working Principle:
2.1 The block diagram is shown in Figure 1.
2.2 Action principle
2.2.1 Negative sequence voltage filter: C3, RA (R10, R12), C4, RB (R9, R13) form a resistive capacitive filter. The schematic diagram is shown in Figure 2. Choosing RA=3 XC3, RB=XC4 3 can result in no output (only a small unbalanced voltage) from the filter when a positive sequence voltage is applied to the input, while when a negative sequence voltage is applied to the input, the output voltage Umn=1.5 3U2Aej30o=1.5U2ABej60o. The vector diagram is shown in Figure 3 because negative sequence filters are generally connected to the phase to phase voltage of the system, that is, the zero sequence component is equal to zero.
2.2.2 The output voltage of the filter is rectified by voltage transformer YH and then applied to the trigger. Under normal circumstances, BG1 is conductive, BG2 is turned off, and the execution element CJ does not operate; When an asymmetric short circuit occurs in the system, the output voltage of the filter causes the trigger to flip, BG1 to turn off, BG2 to turn on, and the CJ action is executed. Adjusting potentiometer R13 can change the setting value of the relay.

Main technical parameters:
3.1 AC rated values: 110V, 173V, 50Hz.
3.2 DC rated voltage: 220V, 110V, 48V.
3.3 Negative sequence action line voltage setting range is 6-12V, with a variation not exceeding 6%.
3.4 Relays are allowed to apply 1.1 times the rated positive sequence current of AC for a long time.
3.5 Allowable range of DC voltage variation: 220V and 110V are allowed to vary within the range of 80-110%, and for 48V, it is allowed to vary within the range of 90-110%. The relay should work normally.
3.6 At rated voltage, the total power consumption of the AC circuit shall not exceed 5VA at 100V, 8VA at 173V, 8W at 220V, 4W at 110V, and 2W at 48V.
3.7 The relay has one dynamic contact (BFY-11A) and one dynamic contact (BFY-12A), or one dynamic contact and one dynamic contact (BFY-13).
3.8 Contact breaking capacity: In DC inductive load circuits with voltage not exceeding 220V and current not exceeding 0.2A (time constant not exceeding 5 × 10-3s), the breaking capacity is 25W. In AC circuits, it is 300VA.
3.9 Temperature Influence: When the ambient temperature changes within the range of -10 �� to+50 ��, the difference between the operating line voltage at any set point of the relay and the operating line voltage at temperature+20 �� shall not exceed ± 10% of the latter.
3.10 Weight: Approximately 11kg. 3.11 Electrical lifespan: 5000 cycles.

Wiring diagram behind the relay:
BFY-11�� 12. The 13 negative sequence voltage relay has a protruding plug-in structure (T-shaped).
BFY-11�� 12. The principle wiring diagram of the 13 negative sequence voltage relay is shown in Figure 4.
BFY-11�� The back view terminal diagram of the 12 negative sequence voltage relay is shown in Figure 5.
The back view terminal diagram of BFY-13 negative sequence voltage relay is shown in Figure 6.

Relay external dimensions and opening dimensions:
BFY-11�� 12. The appearance and installation dimensions of the 13 negative sequence voltage relay are shown in Figure 4 of the universal structural system.

Ordering instructions:
4.1 Relay name, model, and quantity.
4.2 AC and DC rated voltage values.

[voltage relay]JFY-11,12,13 type negative sequence voltage relay

2026-6-15 18:33:12

JFY-11�� 12. The 13 negative sequence voltage relay is used in the relay protection circuit of generators and transformers as a voltage blocking element to reflect the negative sequence component of voltage during asymmetric short circuits.

Relay model name:

Working Principle:
The relay is set with a dial switch, which is convenient and intuitive. The principle diagram is as follows (see Figure 1):

Usage:
Users can easily grasp the usage of the relay based on the back wiring diagram (i.e. Figure 2) and schematic diagram provided on the relay panel.
The green LED used to indicate the power supply on the panel after connecting the DC power supply to terminals 1 and 9 is illuminated. The action value of the relay is set by the dial switch on the panel, and negative sequence voltage is added. The setting value on the dial is the negative sequence voltage action value, with a setting range of 3-15V. After the relay is activated, the red LED on the panel lights up.

Main technical parameters:
7.1 Rated Value
a) Rated AC voltage: 100V, 50Hz.
b) Rated auxiliary DC voltage: 48V, 110V, 220V.
7.2 Operating range of auxiliary DC voltage
The rated value is (80% -110%) at 110V and 220V;
The rated value is (90% -110%) at 48V.
7.3 Action voltage setting value Negative sequence line voltage setting value range: 3V-15V, with a step difference of 0.1V.
7.4 The setting error of the action voltage shall not exceed 5% under the reference conditions, and the consistency of the action shall not exceed 5%.
When the action time is twice the set value, the relay action time shall not exceed 15ms.
The return coefficient of the 7.6 return coefficient relay shall not be less than 0.9.
7.7 Power consumption
7.7.1 Under rated voltage, the power consumption of the AC voltage circuit shall not exceed 1VA/phase.
7.7.2 Under rated voltage, the power consumption of the DC circuit shall not exceed the specifications in Table 1.
7.8 Contact breaking capacity
a) DC circuit:
Under the conditions of a current not exceeding 2A and a voltage not exceeding 250V, a DC inductive load of 50W can be disconnected with a time constant of 5ms ± 0.75ms for the output contact;
b) AC circuit: Under the conditions of current not exceeding 1A and voltage not exceeding 250V, the output contact can disconnect a circuit load of 250VA with a power factor coso of 0.4 ± 0.1.
7.9 Dielectric Strength
Each conductive circuit of the relay should be able to withstand an AC test voltage of 2kV (effective value), 50Hz between exposed non charged metal parts and casings, between input circuit contacts, and between different circuits for 1 minute without insulation breakdown or flashover.
7.10 Working conditions
a) The usage location does not allow explosive media, and the surrounding media should not contain corrosive metals, gases that damage insulation, or conductive media. It is not allowed to be filled with water vapor or have serious mold presence;
b) Strong vibrations and impacts are not allowed in the usage location;
c) The usage location should have facilities to defend against rain, snow, wind, and sand;
d) The usage location does not allow an external magnetic induction intensity exceeding 1.5mT.
7.11 Electrical anti-interference
Relays shall comply with GB7261 and GB6261 "Electrical anti-interference test for emergency protection devices of static relays".

Wiring diagram behind the relay:

Relay external dimensions and opening dimensions:
The relay is based on a static principle and features a protruding plug-in structure. The external dimensions and installation dimensions of JK-2 are shown in Figure 4 of the universal structural system, JK-1 is shown in Figure 3 of the universal structural system, and the embedded plug-in structure is shown in Figure 7 of the universal structural system.

Ordering instructions:
8.1 Product model, name, structural form, etc.
8.2 Order Quantity.
8.3 Auxiliary power supply voltage level.

[voltage relay]JY8 series integrated circuit voltage relay

2026-6-15 18:33:04

Purpose:
The JY8 series integrated circuit voltage relay is a static, transient, and AC voltage relay. Used in relay protection devices for generators, transformers, and transmission lines, as an action element for overvoltage protection and low-voltage lockout. The relay adopts a digital dial switch, a dedicated switch regulated power supply, and a high-performance intermediate relay to ensure the safety and reliability of the entire machine.
This series of products is an upgraded product designed specifically to replace DY series relays, and those with a setting value above 15V do not require the addition of a DC auxiliary power supply. This product has the advantages of high precision, low power consumption, fast action time, high return coefficient, intuitive and convenient tuning, wide tuning range, and no shaking phenomenon when used as a low voltage. Moreover, the external dimensions and wiring terminals of the relay are identical to those of the DY series, making replacement convenient.

JY8 series integrated circuit voltage relay model name:

Main technical parameters of JY8 series integrated circuit voltage relay:

3.1 Voltage Setting Range
a) A: 1V~140V (requires auxiliary DC power supply);
b) B: 15V��130V ��
c) C: 80V��240V ��
d) D: 180V��440V ��
3.2 Rated auxiliary DC voltage: 48V, 110V, 220V.
3.3 Power consumption
Action time: When the voltage transient changes from 0 to 2 times the set value, the action time of the relay shall not exceed 10ms.
3.4 Allowable range of variation for DC auxiliary voltage: 0.8-1.1 times the rated value.
3.5 Action time
a) Overvoltage relay: The action time when the setting value is increased from 0.8 times to 1.2 times shall not exceed 25ms.
b) Low voltage relay: The action time when the setting value drops from 2 times to 0.8 times shall not exceed 25ms.
3.6 Return time
a) Overvoltage relay: When the setting value drops from 1.2 times to 0.8 times, the return time shall not exceed 25ms.
b) Low voltage relay: When the setting value is increased from 0.8 times to 2 times, the return time shall not exceed 25ms.
3.7 Return coefficient:
a) The return coefficient of overvoltage relay shall not be less than 0.9.
b) The return coefficient of the low-voltage relay is not greater than 1.1.
3.8 Setting error: Under reference conditions, the voltage setting error shall not exceed 5%.
3.9 Contact Performance:
The relay contacts have a breaking capacity of 50W in a DC inductive load circuit with a voltage not exceeding 250V and a current not exceeding 2A (time constant of 5ms ± 0.75ms), and a breaking capacity of 250VA in an AC circuit with a voltage not exceeding 250V and a current not exceeding 1A (power factor of 0.4 ± 0.1).
3.10 Insulation resistance
The insulation resistance between the exposed non charged metal parts and the circuits without electrical connection of each relay circuit should not be less than 300M ��.
3.11 Dielectric Strength
Relay circuits should be able to withstand an AC test voltage of 2kV (effective value) and 50Hz between exposed non-metallic parts, as well as between coil circuits and contact circuits, for a duration of 1 minute. There should be no insulation breakdown or flashover phenomenon.
3.12 Working conditions
a) The usage location does not allow explosive media, and the surrounding media should not contain gases or conductive media that corrode or damage metals. It is not allowed to be filled with water vapor or have serious mold presence;
b) Strong vibrations and impacts are not allowed in the usage location;
c) The usage location should have equipment to defend against rain, snow, wind, and sand;
d) The usage location does not allow an external magnetic induction intensity exceeding 1.5mT.
3.13 Electrical anti-interference relays shall comply with GB7261 and GB6261 "Electrical anti-interference tests for static relays and protective devices".

Wiring diagram behind the relay:
The contacts in the picture are in a relay inactive state.

Relay external dimensions and opening dimensions:
See Figure 1 in the general structural system for the structure of 10
See Figure 3 in the general structural system for the 20 structure
See Figure 7 in the general structural system for the 30 structure

Ordering instructions:
6.1 Product model, name, structural form, etc. (refer to Article 2);
6.2 Rated value of auxiliary DC voltage;
6.3 Order quantity;
6.4 Special requirements for contact form, please specify separately.

Note: Please replace and replace the electromagnetic voltage relay according to the following table:

[voltage relay]JY series voltage relay

2026-6-15 18:32:54

Purpose:
JY-10�� 20. The 30 series integrated circuit voltage relay is a static, transient, and AC voltage relay. It can be used in relay protection devices for generators, transformers, and transmission lines as an action element for overvoltage protection or low-voltage interlocking. This relay is composed of an integrated circuit to form an execution circuit, which has the characteristics of high sensitivity, fast action time, low power consumption, and easy setting. The DC power supply and output relay of the relay are monitored by signal indicator lights, and the relay has 2 sets of large capacity contact outputs. Users can directly control the protected equipment according to specific conditions. The relay action value is set by the dial switch on the panel, which is intuitive and convenient.

Relay model name:
Note: (JY-10 represents protruding type, JY-20 represents protruding insertion type, JY-30 represents embedded insertion type) In order to facilitate users to replace various types of voltage relays, please refer to the following table for comparison:

Working Principle:
The input voltage is converted into an appropriate voltage by a voltage to voltage converter, and through the setting of the operating value and active bandpass filtering, it undergoes full wave rectification. The pulsating voltage is compared and integrated, and the detector judges the integrated voltage. When the integrated level exceeds the detection level, the detector outputs a high level to drive the output relay to operate.
This relay adopts a new type of integral judgment circuit, which makes the action time and return time of the relay fast, and the transient overshoot is also small, with strong anti-interference performance.

Usage:
Firstly, carefully observe the panel of this relay, where the two ZK switches in the upper left corner are used for setting UD and �� U. For example, if you have a relay with UN=100V or (Type A) in your hand, when the UD switch is turned to 13V, the UD setting value is 13V, and so on. You can obtain a setting value of 1V through the switch. If it cannot meet your needs and then use the MN dial switch in the lower left corner for fine adjustment, please calculate according to the formula U=UD (1+M.N)+�� U on the panel. The calculation method is as follows: if U=100V or (Type A) you need U=130V, you can first set UD to 13V, and then calculate M=9 and N=0 through the formula. After setting according to the above method, when the applied voltage U=130V, the right indicator light will change from green during normal operation to red, and the relay will act. The setting range is shown in the previous table (�� U is generally set to zero).

Main technical parameters:
5.1 Rated Value
a) Rated AC voltage: 100V, 400V;
b) Frequency: 50Hz;
c) Rated auxiliary DC voltage: 48V, 110V, 220V.
5.2 Setting range (see previous table) 5.3 Action time
a) When the overvoltage is twice the set value, the action time shall not exceed 30ms;
b) The action time at low voltage -0.5 times the set value shall not exceed 30ms.
5.4 The return time shall not exceed 45ms.
5.5 Action consistency: not greater than 2.5%.
5.6 Fixed value error: not greater than ± 2.5%.
5.7 Return coefficient: overvoltage not less than 0.9, low voltage not greater than 1.1.
5.8 Power consumption
AC power consumption: not exceeding 1VA at rated voltage.
DC power consumption: Under rated auxiliary DC voltage, the power consumption before relay action shall not exceed 3W, and the power consumption after action shall not exceed 6W.
5.9 Contact Performance
When the time constant of the inductive load is 5ms, the breaking capacity of the relay contacts is not greater than 2A when the AC voltage is 250V, and not greater than 5A when the DC voltage is 24V.
5.10 Working conditions
a) High pressure range of 80kPa-16kPa;
b) Environmental temperature -10 �� -+50 ��
c) The relative humidity of the air shall not exceed 90% (monthly average minimum temperature of 20 ��);
d) Strong external magnetic induction intensity is not allowed in the place of use;
e) The place of use does not allow conductive dust or corrosive gases that damage metals and insulation;
f) The place of use does not allow explosive hazards or media filled with dust;
g) The place of use does not allow the presence of severe mold;
h) Strong vibrations and impacts are not allowed in the usage area;
i) The place of use should have rain, snow, wind and sand protection devices and not be filled with water vapor.
5.11 Insulation Resistance
The insulation resistance between the relay housing and each terminal, as well as between electrically unrelated circuits, shall not be less than 300M ��.
5.12 Dielectric Strength
The insulation strength between the relay housing and each terminal, as well as between electrically unrelated circuits, should be able to withstand an AC voltage of 2kV, 50Hz for 1 minute without flashover or breakdown. The same group of contacts should be able to withstand 1kV, 50Hz AC voltage for 1 minute without flashover or breakdown.
5.13 Anti interference performance
Compliant with GB7261 and GB6261 "Electrical Interference Test for Static Relays and Protection Devices".

Wiring diagram behind the relay:
The contact in the figure is the state where the relay is applied with DC auxiliary voltage, but the AC voltage is zero (i.e. overvoltage does not act, low voltage acts). When neither DC nor AC voltage is applied, that is, when the relay is in a power-off state, the contact state of the overvoltage relay (JY-11, 21,31) is the same as the contact state in the figure, while the contact state of the low-voltage relay (JY-12, 22,32) is exactly opposite to the contact state in the figure.

Relay external dimensions and opening dimensions:
See Figure 1 in the general structural system for the structure of 10��
See Figure 3 in the general structural system for the 20 structure��
See Figure 7 in the general structural system for the 30 structure.

Ordering instructions:
8.1 Relay name and model.
8.2 Auxiliary DC voltage rating and voltage setting range (if there are special requirements, please specify separately).
8.3 If the contact form is a special requirement, please specify it separately.
8.4 Order quantity.

[voltage relay]JY-2A/R type DC high and low voltage relay

2026-6-15 18:32:46

Purpose:
JY-2A/R type DC high and low voltage relay is a DC voltage automatic adjustment test component, which can be used in conjunction with DC, nickel barrier battery screens, etc.

Relay model name:

Working Principle:
Under normal operation, if the output voltage of the high-value setting circuit is less than the threshold voltage, relay J1 will not operate and the indicator light will not light up. If the output voltage of the low value setting circuit is greater than the threshold voltage, relay J2 will operate and the dynamic breaking contact will disconnect, and the indicator light will not light up.
When the monitored output voltage changes beyond the setting range of the relay (too high or too low), the dynamic closing (high value) or dynamic breaking (low value) contact of the relay connects the control circuit and sends a signal, that is, the output voltage of the high-value setting circuit is greater than the threshold voltage, the dynamic closing contact closes, the indicator light is on, and the output voltage of the low value setting circuit is less than the threshold voltage, the dynamic breaking contact closes, and the indicator light is on.

Usage:
The high and low values of the relay can be set separately through the dial switch on the panel. According to the setting formula on the panel, they can be adjusted within the specified setting range of the relay (with an adjustment amplitude of not less than 1V). The dial switch corresponds to the ten and one positions in the setting formula.

Main technical parameters of JY-2A/R DC high and low voltage relay:
5.1 Rated DC voltage: 110V, 220V.
5.2 Action setting range Rated DC voltage 110V: High value 110V~149V; Low value of 90V to 109V. Rated DC voltage 220V: high value 220V~260V; Low value 190V~220V.
5.3 Action time: When twice the action value, the action time should not exceed 20ms.
5.4 Fixed value error: not greater than ± 2%.
5.5 Return coefficient: The high value is not less than 0.97, and the low value is not greater than 1.02.
5.6 Power consumption: At rated voltage, the power consumption of the relay shall not exceed 6W.
5.7 Contact Performance: When the time constant of the inductive load is 5ms, the breaking capacity of the relay contacts is not more than 7A when the AC voltage is 250V, and not more than 5A when the DC voltage is 24V.
5.8 Working conditions
a) High pressure range of 80kPa-16kPa;
b) Environmental temperature -10 �� -+50 ��;
c) The relative humidity of the air shall not exceed 90% (monthly average minimum temperature of 20 ��);
d) Strong external magnetic induction intensity is not allowed in the place of use;
e) The place of use does not allow conductive dust or corrosive gases that damage metals and insulation;
f) The place of use does not allow explosive hazards or media filled with dust;
g) The place of use does not allow the presence of severe mold;
h) Strong vibrations and impacts are not allowed in the usage area;
i) The place of use should have rain, snow, wind and sand protection devices and not be filled with water vapor.
The insulation resistance between the insulation resistance relay housing and each terminal, as well as between electrically unrelated circuits, shall not be less than 300M ��.
The insulation strength between the relay housing and each terminal, as well as between electrically unrelated circuits, should be able to withstand an AC voltage of 2kV, 50Hz for 1 minute without flashover or breakdown. The same group of contacts should be able to withstand 1kV, 50Hz AC voltage for 1 minute without flashover or breakdown.
5.11 The anti-interference performance complies with GB7261 and GB6261 "Electrical Interference Test for Static Relays and Protection Devices".

Wiring diagram behind the relay:
The contacts in the picture are in a relay power-off state

Relay external dimensions and opening dimensions:
Refer to Figures 2 and 6 in the protruding modular insertion structure.

Ordering instructions:
8.1 Relay name and model.
8.2 DC rated voltage (if there are special requirements, please specify separately).
8.3 If the contact form is a special requirement, please specify it separately.
8.4 Order quantity.
8.5 Relay matching: Relay base and several sockets (to be ordered separately).
8.6 If necessary, it can be modified into an AC high and low voltage relay, with the same setting range and usage method as a DC high and low voltage relay.

[voltage relay]JY-6 Three phase low voltage relay

2026-6-15 18:32:36

Purpose:

JY-6 three-phase low-voltage relay is used in relay protection lines of power systems as a voltage blocking component.

Relay model name:
Example: The order code for a three-phase low-voltage relay with an auxiliary DC working voltage of 110V is JY-6/110V.

Working Principle:
The JY-6 three-phase low voltage relay has three low voltage circuits inside, which are set by dial switches for convenience and intuitiveness. Use three outlet relays separately (see relay principle diagram and internal wiring diagram of relay); It exists independently of each other. The schematic diagram of each circuit of the relay is as follows: (see Figure 1)

Usage:
Users can easily grasp the usage of the relay based on the internal wiring diagram (i.e. Figure 2) and schematic diagram provided on the relay panel.
The LED used to indicate the power supply (marked as ± 12V) on the panel after connecting the DC power supply to terminals 112 and 114 emits light. Otherwise, it indicates a fault in the DC circuit of the relay.
The action value of the relay is set by the dial switch on the panel, and the three low-voltage circuits are debugged and set separately. First, put a low voltage circuit into operation, and the setting value on the dial is the low voltage operating value, with an operating range of 10-99V and a low voltage outlet. After the relay is activated, the UA LED on the panel lights up. The other two circuits UB and UC of the relay operate similarly to the above, with a low voltage outlet. After the relay is activated, the light-emitting diodes labeled UB and UC on the panel will light up.

Main technical parameters of JY-6 three-phase low voltage relay:
7.1 Rated voltage:
a) Rated AC voltage: 100V, 50Hz.
b) Rated auxiliary DC voltage: 48V, 110V, 220V.
7.2 The fluctuation range of auxiliary DC voltage is (80%~110%) of the rated value when it is 110V and 220V; The rated value is (90%~110%) at 48V.
7.3 Action voltage setting value: 10V~99V, with a step difference of 1V;
7.4 Action voltage setting error: Under reference conditions, the voltage setting error shall not exceed ± 7%.
7.5 Action Consistency: Under reference conditions, the voltage setting error shall not exceed 5%.
7.6 Action time: When reducing from 1.2 times the set value to 0.5 times the set value, the voltage action time shall not exceed 15ms. 7.6 Return coefficient: The voltage return coefficient shall not exceed 1.1.
7.7 Power consumption
7.7.1 Power consumption of relay DC circuit: At rated voltage, the power consumption of AC voltage circuit shall not exceed 3VA/phase;
7.7.2 Relay DC circuit power consumption: Under rated DC voltage, the DC circuit power consumption shall not exceed 3.
7.8 Contact breaking capacity
a) DC circuit: Under the conditions of current not exceeding 1A and voltage not exceeding 250V, the external output contact can disconnect a DC inductive load of 30W with a time constant of 5ms ± 0.75ms.
b) AC circuit: Under the conditions of current not exceeding 1A and voltage not exceeding 250V, the external output contact can disconnect the load of the circuit with a power factor coso of 0.4 ± 0.1 at 250VA.
The conductive circuits of the 7.9 dielectric strength relay should be able to withstand an AC test voltage of 2kV (effective value) and 50Hz between the exposed non charged metal parts and the casing, as well as between the input circuit contacts, for a duration of 1 minute without insulation breakdown or flashover.
7.10 Working conditions
a) The usage location does not allow explosive media, and the surrounding media should not contain corrosive metals, gases that damage insulation, or conductive media. It is not allowed to be filled with water vapor or have serious mold presence;
b) Strong vibrations and impacts are not allowed in the usage location;
c) The usage location should have facilities to defend against rain, snow, wind, and sand;
d) The usage location does not allow an external magnetic induction intensity exceeding 1.5mT.
7.10 Electrical anti-interference
Relays shall comply with GB7261 and GB6261 "Electrical anti-interference test for emergency protection devices of static relays".

Wiring diagram behind the relay:

Relay external dimensions and opening dimensions:
The appearance and opening size of the relay are shown in Figure 4 and Figure 8 of the protruding modular insertion structure.

Ordering instructions:
8.1 Product model, name, structural form, etc. (refer to Article 2).
8.2 Order Quantity.
8.3 Relay matching: such as base, socket, etc. (must be ordered separately).

[voltage relay]JLY-14 type zero sequence voltage relay

2026-6-15 18:32:28

The JLY-14 zero sequence voltage relay is a static, transient, and AC voltage relay with a fast action time but a small contact capacity. It is generally used in conjunction with fast intermediate relays and is used for bus differential protection.
This relay is composed of an integrated circuit to form an execution circuit, which has the characteristics of high sensitivity, fast speed, and low power consumption. A small reed relay is used as an outlet relay; There are light-emitting diodes on the panel to display the operation status of the relay, and there is a normally open contact. The relay is set using a dial switch on the panel, which is intuitive and convenient.

Working Principle:
Under normal circumstances, the voltage level formed by the square wave is lower than the reference voltage level, which prevents the transistor from conducting. Therefore, the outlet relay does not operate. When the system malfunctions and its value exceeds the relay setting value, the voltage level formed by the square wave is higher than the reference voltage level, and the outlet relay operates.

Main technical parameters of JLY-14 zero sequence voltage relay:
4.1 Rated voltage: 110V, rated frequency 50Hz.
4.2 Setting range: 2-51.5V, with a step difference of 0.5V.
4.3 Action time: When the voltage transient changes from 0 to 2 times the set value, the action time of the relay shall not exceed 10ms.
4.4 Consistency of actions �� 3%.
4.5 Fixed value error �� 3%.
4.6 Temperature variation (every 1 ��) �� 0.2%.
4.7 Environmental temperature: -10 �� to 50 ��.
4.8 Power consumption: less than 2VA at rated voltage of 100V.
4.9 Return coefficient: not less than 0.9.
4.10 Auxiliary DC voltage: 220V or 110V.
4.11 DC power consumption: 220V<4W, 110V<2W.
4.12 Contact performance: In DC inductive circuits with a time constant of less than 40 ± 6ms, the contact breaking capacity is less than 0.1A at 220V.
4.13 Dielectric Strength Relay: All lead out terminals of the relay can withstand 2kV, 50Hz for 1 minute without breakdown or flashover.

Wiring diagram behind the relay:

Relay external dimensions and opening dimensions:
Refer to Figures 2 and 6 in the protruding modular insertion structure.

Ordering instructions:
6.1 Product model, name, structural form, etc.
6.2 Order Quantity.
6.3 Relay matching: such as base, socket, etc. (must be ordered separately).

[voltage relay]JFY-2 type negative sequence voltage relay

2026-6-15 18:32:19

Purpose:

JFY-2 negative sequence voltage relay is used as a discrimination element for two-phase short circuit faults in systems or equipment. Combined with low-voltage relays to form composite voltage components, used as blocking elements for current relays.
The setting of JFY-2 negative sequence voltage relay is carried out using the dial switch on the panel, which is intuitive and convenient.

Working Principle:
The block diagram is shown in Figure 1. The voltage measurement circuit consists of a voltage converter, a phase shifter, and an adder. UCK2 is delayed by 120 ° by a phase shifter and added to UCK1 to form the negative sequence voltage filter output UCK5.
UCK5=UCK1+UCK2 �� -120 °.
Make the transformation ratio KYH1 of voltage converter YH1 the same as the transformation ratio KYH2 of YH2.
When KYH1=KYH2=KYH, UAC=UBC=U1, UCK1 = UCK2 = U1/KYH��
Select the appropriate parameters so that UCK5=0V when inputting three-phase positive sequence voltage, as shown in Figure 2 (a)
Therefore, when inputting three-phase negative sequence voltage, UCK5 = 3U1/KYH�� Refer to Figure 2 (b).
The output UCK5 of the negative sequence voltage filter is compared with the threshold voltage UCK7 obtained by setting, rectifying, filtering, and level detection. During normal operation and symmetrical three-phase short circuit, UCK5=0V�� The filtered output UCK6 is also 0V. The level detection output is a positive signal, and the relay does not operate. When a two-phase short circuit occurs and the negative sequence voltage value reaches UCK6>UCK7, the level detection outputs a negative signal and the relay operates.

Main technical parameters:
5.1 AC rated voltage: 110V, 50Hz.
5.2 DC rated voltage: 110V, 220V.
5.3 Power consumption: AC voltage circuit. Power consumption per phase under rated voltage �� 1VA; DC voltage circuit, �� 3W under rated voltage 110V; �� 4W under rated voltage 220V.
5.4 Negative sequence voltage setting range: 2-21.8V, with a step difference of 0.2V.
5.5 Scale error: not exceeding ± 5%.
The discrete value of various two-phase short-circuit action voltages is �� 5%.
5.7 Return coefficient: �� 0.9.
5.8 Action time: �� 25ms tested at twice the action voltage.
5.9 Allowable ambient temperature: -10 �� to+50 ��.
5.10 Contact breaking capacity
a) DC circuit: Under the conditions of current not exceeding 2A and voltage not exceeding 250V, the external output contact can disconnect a DC inductive load of 30W with a time constant of 5ms ± 0.75ms.
b) AC circuit: Under the conditions of current not exceeding 1A and voltage not exceeding 250V, the external output contact can disconnect the load of the circuit with a power factor coso of 0.4 ± 0.1 at 250VA.
5.11 Dielectric Strength
The conductive circuits of the relay should be able to withstand an AC test voltage of 2kV (effective value) and 50Hz between the exposed non charged metal parts and the casing, as well as between the input circuit contacts, for a duration of 1 minute without insulation breakdown or flashover.
5.12 Working conditions
a) The usage location does not allow explosive media, and the surrounding media should not contain corrosive metals, gases that damage insulation, or conductive media. It is not allowed to be filled with water vapor or have serious mold presence;
b) Strong vibrations and impacts are not allowed in the usage location;
c) The usage location should have facilities to defend against rain, snow, wind, and sand;
d) The usage location does not allow an external magnetic induction intensity exceeding 1.5mT.
5.13 Electrical anti-interference relays shall comply with GB7261 and GB6261 "Electrical anti-interference tests for static relays and protective devices".

Rear wiring diagram of JFY-2 negative sequence voltage relay:

Relay external dimensions and opening dimensions:
Refer to Figures 2 and 6 in the protruding modular insertion structure.

Ordering instructions:
7.1 Product model, name, structural form, etc.
7.2 Order Quantity.
7.3 Relay matching: such as base, socket, etc. (must be ordered separately).

[voltage relay]JHY-31 type composite voltage relay

2026-6-15 18:32:10

JHY-31 composite voltage relay is used in relay protection lines of power systems as a discrimination element and voltage blocking element for various types of faults.

Relay model name:
Example: The order code for the composite voltage relay with an auxiliary DC working voltage of 110V is JHY-31/110V.

Working Principle:
The relay has three internal circuits: negative sequence, low voltage, and zero sequence, each with a dial switch for convenient and intuitive setting. The negative sequence and low voltage circuits share the same outlet relay (see relay principle diagram and internal wiring diagram of the relay); The zero sequence circuit is equivalent to an overvoltage relay, which exists independently of the other two circuits. The schematic diagram of each circuit of the relay is as follows (see Figure 1)

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Usage:
Users can easily grasp the usage of the relay based on the internal wiring diagram (i.e. Figure 2) and schematic diagram provided on the relay panel.
The LED used to indicate the power supply (marked as ± 12V) on the panel after connecting the DC power supply to terminals 112 and 114 emits light. Otherwise, it indicates a fault in the DC circuit of the relay.
The operating value of the relay is set by the dial switch on the panel, and the negative sequence circuit and low voltage circuit share the same outlet. But during debugging, the DIP switches on the panel can be used to control the settings separately. First, put the negative sequence circuit into operation. The setting value on the dial is the operating value of the negative sequence line voltage, with a setting range of 1-9.9V. After setting, disconnect the negative sequence outlet and put it into the low voltage outlet. Set the low voltage action value, with an action range of 10-99V. After both circuits are set, turn the DIP switches to the ON position. After the relay is activated, the LED labeled U2 and UThe zero sequence circuit exists independently, equivalent to an overvoltage relay with a setting range of 5-50V. After the relay is activated, the LED labeled 3UO on the panel lights up.

Main technical parameters of JHY-31 composite voltage relay:
7.1 Rated voltage
a) Rated AC voltage: 100V, 50Hz.
b) Rated auxiliary DC voltage: 48V, 110V, 220V.
7.2 Auxiliary DC voltage fluctuation range: (80%~110%) rated value at 110V 220V;
The rated value is (90%~110%) at 48V.
7.3 Action voltage setting value
a) Negative sequence voltage setting value: 1V~9.9V, with a step difference of 0.1V;
b) Low voltage setting value: 10V~99V, with a step difference of 1V;
c) Zero sequence voltage setting value: 5V~50V, with a step difference of 1V;
Note: If the user has special requirements. The zero sequence voltage setting range can achieve 10-99V or 20-198V.
7.4 Action voltage setting error: Under reference conditions, the voltage setting error shall not exceed 5%
7.5 Action time
a) When rising from zero to twice the set value, the action time of negative sequence voltage and zero sequence voltage shall not exceed 15ms;
b) When the setting value is reduced from 1.2 times to 0.5 times, the low voltage action time shall not exceed 15ms.
7.6 Return coefficient
a) The return coefficient of negative sequence voltage and zero sequence voltage shall not be less than 0.9;
b) The return coefficient of low and low voltage is not greater than 1.1.
7.7 Power consumption
7.7.1 The power consumption of the relay AC circuit is at rated voltage, and the power consumption of the three-phase AC voltage circuit is not greater than 1VA/phase; The power consumption of the zero sequence voltage circuit shall not exceed 1VA.
7.7.2 The power consumption of the DC circuit of the relay shall not exceed the specified value in Table 3 at the rated DC voltage.
7.8 Contact breaking capacity
a) DC circuit: Under the conditions of current not exceeding 2A and voltage not exceeding 250V, the external output contact can disconnect a DC inductive load of 50W with a time constant of 5ms ± 0.75ms.
b) AC circuit: Under the conditions of current not exceeding 1A and voltage not exceeding 250V, the external output contact can disconnect the load of the circuit with a power factor coso of 0.4 ± 0.1 at 250VA.
The conductive circuits of the 7.9 dielectric strength relay should be able to withstand an AC test voltage of 2kV (effective value) and 50Hz between the exposed non charged metal parts and the casing, as well as between the input circuit and the contacts, for a duration of 1 minute without insulation breakdown or flashover.
7.10 Working conditions
a) The usage location does not allow explosive media, and the surrounding media should not contain corrosive metals, gases that damage insulation, or conductive media. It is not allowed to be filled with water vapor or have serious mold presence;
b) Strong vibrations and impacts are not allowed in the usage location;
c) The usage location should have facilities to defend against rain, snow, wind, and sand;
d) The usage location does not allow an external magnetic induction intensity exceeding 1.5mT.
7.11 Electrical anti-interference relays shall comply with GB7261 and GB6261 "Electrical anti-interference tests for static relays and protective devices".

Wiring diagram behind the relay:

Relay external dimensions and opening dimensions:
The appearance and opening size of the relay are shown in Figure 4 and Figure 8 of the protruding modular insertion structure.

Ordering instructions:
8.1 Product model, name, structural form, etc. (refer to Article 2).
8.2 Order Quantity.
8.3 Relay matching: such as base, socket, etc. (must be ordered separately).

[voltage relay]JY-1A,JY-1C Voltage Relay

2026-6-15 18:32:02

Purpose:
The JY-1 series integrated circuit voltage relay is a static, transient, and AC voltage relay. It can be used in relay protection devices for generators, transformers, and transmission lines as an action element for overvoltage protection or low-voltage interlocking. This relay is composed of an integrated circuit to form an execution circuit, which has the characteristics of high sensitivity, fast action time, low power consumption, and easy setting. The DC power supply and output relay of the relay are monitored by signal indicator lights, and the relay has 2 sets of large capacity conversion contact outputs. Users can directly control the protected equipment according to specific situations (except for JY-1A). The relay action value is set by the dial switch on the panel, which is intuitive and convenient.

Relay model name:

Working Principle:
The input voltage is converted into an appropriate voltage by a voltage to voltage converter, and through the setting of the operating value and active bandpass filtering, it undergoes full wave rectification. The pulsating voltage is compared and integrated, and the detector determines the integration level horizontally. When the integration level exceeds the detection level, the detector outputs a high level to drive the output relay to operate.
This relay adopts a new type of integral judgment circuit, which makes the action time and return time of the relay faster,
Transient surpassing is also small, with strong anti-interference performance.

Instructions for using JY-1A and JY-1C voltage relays:
Firstly, please carefully observe the panel of this relay,
The two ZK switches in the upper left corner are used for setting UD and �� U. For example, you have a UN=100V in your hand
When the UD switch is turned to 10V, the UD setting value is 10V, and so on. You can obtain a setting value of 3V through the switch. If it cannot meet your needs, please use the MN dial switch in the lower left corner for fine adjustment. Please calculate according to the formula U=UD (1+M.N)+�� U on the panel, as shown in the following example:
UN=100V, you need U=80V. You can first set UD to 10V, and then calculate M=7 and N=0 through the formula. After the above method is set, when the applied voltage U=80V, the right indicator light changes from green to red during normal operation, and the relay acts (DU is usually set to zero).

Main technical parameters of JY-1A and JY-1C voltage relays:
5.1 Rated Value
a) Rated AC voltage: 100V, 400V;
b) Frequency: 50Hz;
c) Rated auxiliary DC voltage: 48V, 110V, 220V.
5.2 Setting range:
When UN=100V, the setting range is 3V~109.5V;
When UN=400V, the setting range is 12V~438V.
5.3 Action time
a) When overvoltage -1.2 times the set value: the action time is not more than 50ms;
b) When the low voltage is 0.8 times the set value, the action time should not exceed 50ms.
5.4 Return time
a) Overvoltage - The instantaneous change in voltage from 1.2 times the set value to zero shall not exceed 50ms;
b) Low voltage - The instantaneous change in voltage from 0.8 times to 1.2 times the set value should not exceed 50ms.
5.5 Action consistency: not greater than 1%.
5.6 Fixed value error: not greater than ± 5%.
5.7 Return coefficient: overvoltage not less than 0.92, low voltage not greater than 1.08.
5.8 Power consumption
AC power consumption: not exceeding 1VA at rated voltage.
DC power consumption: Under rated auxiliary DC voltage, the power consumption before relay action shall not exceed 3W, and the power consumption after action shall not exceed 6W.
5.9 Contact Function
When the time constant is 5ms for an inductive load, the breaking capacity of the relay contacts is not greater than 2A for an AC voltage of 250V, and not greater than 5A for a DC voltage of 24V. (JY-1A: In a DC inductive circuit with a time constant of 40ms, the voltage is not greater than 250V, the current is not greater than 1A, and the breaking capacity of the contacts is 30W).
5.10 Working conditions
a) The atmospheric pressure ranges from 80kPa to 106kPa;
b) Environmental temperature -10 �� -+50 ��;
c) The relative humidity of the air shall not exceed 90% (monthly average minimum temperature of 20 ��);
d) Strong external magnetic induction intensity is not allowed in the place of use;
e) The place of use does not allow conductive dust or corrosive gases that damage metals and insulation;
f) The place of use does not allow explosive hazards or media filled with dust;
g) The place of use does not allow the presence of severe mold;
h) Strong vibrations and impacts are not allowed in the usage area;
i) The place of use should have rain, snow, wind and sand protection devices and not be filled with water vapor.
5.11 Insulation Resistance
The insulation resistance between the relay housing and each terminal, as well as between electrically unrelated circuits, shall not be less than 300M ��.
5.12 Dielectric Strength
The insulation strength between the relay housing and each terminal, as well as between electrically unrelated circuits, should be able to withstand an AC voltage of 2kV, 50Hz for 1 minute without flashover or breakdown. The same group of contacts should be able to withstand 1kV, 50Hz AC voltage for 1 minute without flashover or breakdown.
5.13 Anti interference performance
Compliant with GB7261 and GB6261 "Electrical Interference Test for Static Relays and Protection Devices".

Wiring diagram behind the relay:
As shown in Figure 1 (the contacts in the figure are the state when the relay is in a power-off state without applying DC voltage and AC voltage. When the relay is applied with DC auxiliary voltage but the AC voltage is zero, the contact state of the overvoltage relay is the same as that in the figure, while the contact state of the low-voltage relay is exactly the opposite).
Note: When the DC power supply indicated in the back view is 110V, the wiring should be 225 and 222 when the power supply is 220V, and 225 and 224 when the power supply is 48V.

Relay external dimensions and opening dimensions:
Refer to Figures 2 and 6 in the protruding modular insertion structure.

Ordering instructions:
8.1 Relay name and model.
8.2 Auxiliary DC voltage rating and AC voltage setting range or rated AC voltage (if there are special requirements, please specify separately).
8.3 If the contact form is a special requirement, please specify it separately.
8.4 Order quantity.
8.5 JY-1A, 1C relay matching: relay base and several sockets (to be ordered separately).

[voltage relay]JY-10,JY-20,JY-30 series static voltage relay

2026-6-15 18:31:53

JY-10�� 20. The 30 series static voltage relay is used in relay protection devices for generators, transformers, and transmission lines as a starting element for overvoltage protection or undervoltage lockout.

[voltage relay]DY-20C series voltage relay

2026-6-15 18:31:44

The DY-20C series voltage relay is an electromagnetic instantaneous voltage relay used as a starting element in protection circuits for voltage rise (overvoltage) or voltage drop (low voltage lockout) of motors, transformers, and transmission lines.