Shanghai Huabang Industrial Business Network - current relay

[current relay]ACR-NT Current Relay

2026-6-12 11:28:01

ACR-NT current relay
Control mode: overcurrent relay
Current setting: AC 0~1A, AC 0~2A, AC 0~3A, AC 2~7A
Start compensation time: 0-10 seconds or 0-30 seconds
If the current reset value is lower than the set value, it will reset

model		ACR-NT/ACR-YT
rated voltage		AC(V):110,220,240,380,415,440,50/60Hz
Output contact		1a 5A/1b 5A
Indicator light action		Overcurrent indication
longevity fate	Mechanics	5×10^6 times
	Electrical	10^5 times
Setting error		±5% max
Return time		0.05 sec max
power consumption		2VA
Environmental temperature for use		-10��~+55��
Environmental humidity for use		45%~85%RH
weight		Approx.250g

Wiring diagram and timing diagram of ACR-NT current relay

Appearance dimension diagram of ACR-NT current relay

ACR-NT current relay

[current relay]JL-8G Current Relay

2026-6-12 11:27:52

JL-8G current relay is a terminal block integrated circuit current relay (hereinafter referred to as current relay) used as a relay protection component, mainly in generators, transformers, and transmission and transformation lines. It serves as a starting element for AC circuit overload or short circuit in power systems, providing alarm signals or cutting off faults.

The JL-8G current relay adopts CMOS integrated circuit for operation and comparison, which has the characteristics of high accuracy, wide setting range, fast action speed, high return coefficient, and low power consumption.

JL-8G current relay

[current relay]JL-8D/ Port X Port Series Timed Current Relay

2026-6-12 11:27:44

JL-8D/Port X Series Timed Current Relay

[current relay]JL-8D type definite time current relay

2026-6-12 11:27:35

JL-8D type timed current relay

[current relay]JL-8C type inverse time current relay

2026-6-12 11:27:27

JL-8C type inverse time current relay

[current relay]JL-8 type integrated circuit current relay

2026-6-12 11:27:18

JL-8 Integrated Circuit Current Relay

[current relay]JHL10,JHL20,JHL30 series current relay

2026-6-12 11:27:10

JHL10�� 20. 30 series current relay
1. Application scope
The JHL series integrated circuit current relay is a new generation product of the DL series electromagnetic current relay, which has the characteristics of high precision, low dynamic consumption, fast action time, intuitive and convenient setting, and wide range. An auxiliary power supply for communication must be provided.

2. Main technical parameter data

AC auxiliary voltage AC 110, 220, 380V;
Current setting range A: 0.05-0.5A; B��0.2-2A�� C��2-20A�� D��5-50A�� E��10-100A
Within the setting range, the setting error is �� 30%
The allowable range of variation for AC auxiliary voltage is 0.8-1.10 times the rated value
The relay contacts can be connected for a long time at 5A.
Return coefficient 0.85-0.90

3. Internal wiring

4. Appearance and opening size

JHL10, JHL20, JHL30 series current relays

[current relay]DL-6 type current relay

2026-6-12 11:27:01

DL-6 type current relay

[current relay]DL-4,DL-5 series current relay

2026-6-12 11:26:53

DL-4, DL-5 series current relays

[current relay]DL-7 series current relay

2026-6-12 11:26:44

DL-7 series current relay

[current relay]JWL-60,70,80 series static current relay without auxiliary power supply

2026-6-12 11:26:36

1 JWL-60�� The 70 and 80 series static current relays without auxiliary power supply are static relays composed of imported integrated circuits. The measured AC current I - is isolated by an inverter, and 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

JWL-60�� Classification and meaning of static current relay models for 70 and 80 series without auxiliary power supply

JWL-60�� 70 and 80 series static current relays without auxiliary power supply

[current relay]JL-60,70,80 Static current relay

2026-6-12 11:26:25

Principle Description

1 JL-60�� The 70 and 80 static current relays are static relays composed of imported integrated circuits. The measured AC current I - is isolated by an inverter, and 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

JL-60, Classification and meaning of 70,80 static current relay models

JL-60�� 70, 80 static current relay

[current relay]HL-10.20.30 series static current relay

2026-6-12 11:26:17

1. Overview

The HL series integrated circuit current relay is used as a starting element in overload short-circuit protection devices for motors, transformers, and transmission lines. 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 shortcomings of electromagnetic relays such as easy contact shaking, high working noise, difficult adjustment of action return coefficient, and variable action value after transportation. The product is divided into three series
Column: HL-10, HL-20, HL-30, can replace DL-10, 20, 30, JL-10, 20, 30 respectively

2. Model

3. Main technical parameters of HL-10.20.30 series static current relay

Auxiliary power supply: AC/DC dual-use 220V, 110V, 48V
Setting range: 2-99.9A
Setting error: Under benchmark conditions, the setting enterprise value error shall not exceed ± 2.5%; one
The consistency shall not exceed 1.5% of the set value.
Return coefficient: Under benchmark conditions, the return action value of any integer point is not less than 0.9.
Power consumption: The power consumption of the AC circuit is less than 2VA, and the power consumption of the DC circuit 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 under the specified load conditions
And return 5 x 104 times. The long-term allowable current for the output contact is 5A.
Dielectric strength: The conductive terminals of the product are connected to the exposed non charged metal parts or shells, and can withstand a 2000V (effective value) 50Hz AC voltage for 1 minute without any edge breakdown or flashover phenomenon.

4. Internal wiring diagram of the product

HL-10.20.30 series static current relay

[current relay]DL-20CE series current relay

2026-6-12 11:26:08

The DL-20CE series current relay (hereinafter referred to as the relay) is used in overload and short-circuit protection circuits of generators, transformers, and transmission lines.

2. Main technical parameters

model

Maximum setting value/A

Maximum setting range/A

Rated current/A

Coil series connection

Parallel connection of coils

Power consumption/VA

return coefficient

Action current/A

Thermal stability current A

Action current/A

Thermal stability current A

series connection

association

long-term

DL-21CE
DL-22CE
DL-23CE
DL-24CE

zero point zero zero eight

0.002-0.008

zero point zero one

zero point zero two

0.002-0.004

zero point zero one

zero point one

0.004-0.008

zero point zero two

zero point two

When connected in series at the rated value, the measurement should not exceed 7

Not less than 0.8

zero point zero two

0.005-0.02

zero point zero three

zero point zero six

0.005-0.01

zero point zero three

zero point three

0.01-0.02

zero point zero six

zero point six

zero point zero six

0.015-0.06

zero point one

zero point two

0.015-0.1

zero point one

one

0.03-0.06

zero point two

two

zero point two

0.05-0.2

zero point three

zero point six

0.15-0.3

zero point three

three

0.1-0.2

zero point six

six

zero point six

0.15-0.6

one

two

0.05-0.1

one

ten

0.3-0.6

two

twenty

two

0.5-2

three

six

0.5-1

four

thirty

1-2

eight

sixty

When the current is 5A and the coil is connected in parallel, the measurement should not exceed 3.5

six

1.5-6

ten

twenty

1.5-3

ten

one hundred

3-6

twenty

two hundred

ten

2.5-10

ten

twenty

2.5-5

ten

one hundred

5-10

twenty

two hundred

fifteen

3.75-15

ten

twenty

3.75-7.5

fifteen

one hundred

7.5-15

thirty

two hundred

twenty

5-20

ten

twenty

5-10

fifteen

one hundred

10-20

thirty

two hundred

fifty

12.5-50

fifteen

thirty

12.5-25

twenty

one hundred and fifty

25-50

forty

three hundred

one hundred

25-100

fifteen

thirty

25-50

twenty

one hundred and fifty

50-100

forty

three hundred

two hundred

50-200

fifteen

thirty

50-100

twenty

one hundred and fifty

100-200

forty

three hundred

Not less than 0.7

Action error: not greater than 6%.
Action time: not more than 0.12s when 1.1 times the measured action value; not more than 0.04s when 2 times the measured action value
Action consistency: not greater than 5%.
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.

3. Internal wiring

DL-20CE series current relay

4. Appearance and opening size

DL-20CE series current relay

[current relay]JSL series integrated circuit timed overcurrent relay

2026-6-12 11:26:00

JSL series integrated circuit timed overcurrent relay

[current relay]DL-21C type current relay

2026-6-12 11:25:52

The DL-21C current relay is used as a starting element in overload and short-circuit protection circuits of generators, transformers, and transmission lines.

0.05A 0.2A 0.6A,2A,6A,10A,20A,50A,100A,200A

DL-21C type current relay

[current relay]JL-11C type static current relay

2026-6-12 11:25:43

JL-11C static current relay is used as a starting element in overload and short-circuit protection circuits of motors, transformers, and transmission lines

2-19.9A
220V.110V.48V

JL-11C Static Current Relay

[current relay]JL-21D type static current relay

2026-6-12 11:25:35

JL-21D static current relay is used as a starting element in overload and short-circuit protection circuits of motors, transformers, and transmission lines

220V,110V.48V
5A-49.9A

JL-21D Static Current Relay

[current relay]JL-31C type static current relay

2026-6-12 11:25:25

JL-31C static current relay is used as a starting element in overload and short-circuit protection circuits of motors, transformers, and transmission lines

2-19.9A
220V,110V.48V

JL-31C Static Current Relay

[current relay]JL-31 type static current relay

2026-6-12 11:25:17

JL-31 static current relay is used as a starting element in overload and short-circuit protection circuits of motors, transformers, and transmission lines

10A.50A,100A
220V,110V.48V

JL-31 Static Current Relay

[current relay]JL-8/DK series static current relay without auxiliary power supply

2026-6-12 11:25:09

I. Overview
The JL-8 series static current relay without auxiliary power supply (hereinafter referred to as the relay) is an upgraded product of static current relay. On the basis of static current relay (requiring the addition of auxiliary power supply) and without affecting its quality, it has been improved and optimized to solve the problem of auxiliary power supply wiring. It is quite convenient to replace the old DL series electromagnetic current relay with this relay. Its size and terminal wiring are exactly the same as the DL type, and there is no need to add wires or change its terminal wiring. It can be directly replaced. It is currently an ideal replacement product.

2�� JL-8/DK series static current relay models and specifications without auxiliary power supply

3�� Comparison Table of Relay Performance and Replacement Models

4�� Technical parameters
1. Current setting range: 2A~99.9A, with a step difference of 0.1A.
2. Power consumption: AC circuit power is less than 1VA (at rated AC value).
3. Action time: The action time for 1.1 times the set value shall not exceed 40ms; the action time for 2 times the set value shall not exceed 35ms.
4. Return coefficient: not less than 0.85.
5. Return time: no more than 27ms.
6. Contact capacity: Relay contacts can be connected for a long time with a capacity of 5A, and the breaking capacity is 30W in a DC circuit with an inductive load of voltage not exceeding 250V, current not exceeding 2A, and a constant of 5mS.
7. The electrical lifespan shall not be less than 100000 cycles.
8. Insulation resistance: The insulation resistance of the following parts should be �� 300M �� (at room temperature) when measured with an open circuit voltage 500V megohmmeter
�� Between all conductive terminals and exposed non-conductive metals or casings;
�� Between dynamic and static contact points;
�� Between the contact point and the AC circuit;
�� Between normally open contacts and normally closed contacts;
9. Dielectric strength: The following parts should be able to withstand the specified AC voltage test for 1 minute without breakdown or flashover:
�� 2000V/50Hz between all conductive terminals and exposed non-metallic or shell;
�� 1000V/50Hz between dynamic and static contacts;
�� 1000V/50Hz between the contact and the AC circuit;
�� 1000V/50Hz between normally open and normally closed contacts.
10. Anti interference performance: The relay's resistance to high-frequency interference complies with the relevant conditions specified in DL478-92 "General Technical Conditions for Static Relay Protection and Safety Automatic Devices".

5�� Internal terminal wiring diagram of relay:

[current relay]JGL-10 series static overcurrent relay

2026-6-12 11:25:00

JGL-10 series static inverse time overcurrent relay

I. Overview

1. JGL series static inverse time overcurrent relays (hereinafter referred to as relays) have inverse time characteristics and are used in relay protection devices for generators, transformers, and transmission and distribution systems. When the equipment is overloaded or short circuited, it can reliably operate within the predetermined time limit, send signals or cut off the faulty part.
2. This relay is an integrated circuit static relay that uses digital switches to set the current value, which is intuitive and convenient. Changing the setting value does not require inspection, and the setting range is 2-9.9A with a step difference of 0.1A. It has high accuracy, low power consumption, fast action time, and high return coefficient, making it an ideal replacement product for GL type overcurrent relays.
3. This relay complies with the power industry standard DL478-2001 "General Technical Conditions for Static Relay Protection and Safety Automatic Devices"; Mechanical industry standard JB3346-83 "Technical Conditions for Inverse Time Overcurrent Relays".

2�� Classification and meaning of relay models

Comparison Table of JGL-10 Series Static Overcurrent Relay Models and Replaced Old Models:

3�� Normal working environment

1. Environmental temperature: -10 �� to+50 ��;
2. Relative humidity: not exceeding 90%;
3. Atmospheric pressure: 86kPa~106kPa;
4. The usage location shall not experience vibrations exceeding the severity level 1 specified in GB/T14537.
5. Surrounding environment: Direct sunlight, rain, and water washing are not allowed. Non explosive media should not be present, and there should be no media or conductive media that can corrode metals, damage insulation and surface coatings. There should be no obvious water vapor or serious mold presence.

4�� Main technical indicators
1. Rated value: 50Hz AC 5A, waveform distortion not exceeding 2%.
2. The overcurrent setting range is 2-9.9A (without auxiliary power supply), with a step difference of 0.1A, and the current setting value error is not greater than ± 3%.
3. The setting range of the speed multiple is 2-9.9 times, with a step difference of 0.1 times, and the error of the current speed setting value is not greater than ± 3%.
The quick action current of a relay is expressed as a multiple of the current setting value: Quick action current=Quick action multiple x Setting current.
4. Quick action time: At any set point of the relay, the action time at 1.2 times the quick action current shall not exceed 50ms.
5. Return coefficient: not less than 0.9.
6. Inverse time characteristic curve action equation:

t: Inverse time action time K: Delay curve coefficient (setting range 0.1-9.9)
Is: Set current value I: Actual input current value (note: I/Is not greater than 1.2 is not recommended for use)
7. Time setting error of inverse time characteristic:
a) When I/Is<2, the average error is not greater than 10%;
b) When I/Is>2, the average error is not greater than 5%+30ms.
8. Typical inverse time characteristics are shown in the table below:
9. Power consumption: The power consumption at rated current shall not exceed 6VA.
10. Contact capacity
a�� Connection capacity: When the DC voltage does not exceed 250V, the continuous connection current of the structure type 1 product contacts is 10A;
b�� Breaking capacity: In inductive load circuits with a voltage not exceeding 250V (L/R=5ms), the breaking capacity of Structure 1 products is 50W.
c�� Overload capacity: The contacts of the relay can reliably disconnect a current of 1.5 times the specified capacity for 5 times, and the performance of the contacts still meets the requirements of technical standards.
11. Medium strength:
Under standard test atmospheric conditions, the conductive parts connected together should be able to withstand a test voltage of AC effective value 2000V/50Hz between the exposed non charged metal parts and the shell for 1 minute without insulation breakdown or flashover.
The same set of dynamic and static contacts should be able to withstand a test voltage of 1000V/50Hz AC effective value; After 1 minute, there was no insulation breakdown or flashover phenomenon.
Different sets of contacts should be able to withstand a test voltage of 2000V/50Hz AC effective value for 1 minute without insulation breakdown or flashover phenomenon.
12. Insulation resistance
Under standard test atmospheric conditions, the insulation value of the conductive parts of the relay between the exposed non charged metal parts and the outer shell should not be less than 20M �� when measured with an open circuit voltage of 500V using a testing instrument.
13. Working life: The relay operates 80000 times under the specified load, with an average time between failures of 80000 hours.

5�� Installation and wiring instructions
1. To ensure the stability and reliable quality of the relay during use, it is necessary to conduct inspections and tests before use. The method is as follows:
a�� Remove the relay from the packaging box.
b�� Check whether the appearance of the relay is intact, whether there is condensation inside the shell, and whether the internal components are damaged.
c�� After confirming that the appearance of the relay is undamaged, various tests and power on inspections can be carried out.
d�� The inspection and testing content can be determined according to the actual situation, including setting value, delay time, insulation, withstand voltage, etc. The inspection method should follow JB3346-83 "Technical Conditions for Inverse Time Overcurrent Relays" and other relevant standards, as well as the technical indicators specified in the manual.
2. After the inspection and testing are completed, proceed with the installation according to the following steps.
a�� Firstly, familiarize yourself with the various wiring terminals of the relay, and then check if the installation dimensions match. b�� Connect the external wiring according to the usage requirements.
c�� After confirming that the wiring is correct, the circuit can be subjected to a power on test to check its functionality.
3. To ensure correct and reliable installation, a careful inspection should be conducted after installation. The inspection includes: whether the relay placement is balanced; Is there any damage to the casing; Are the screws and nuts loose; Whether the wiring is secure, etc. After confirming that everything is normal, it can be put into use.

6�� Setting method and usage precautions.
1. Starting current setting: The starting current setting switch is the leftmost set of dip switches (two in total), with one on the left representing 1A level and one on the right representing 0.1A level. If its values are 5 and 6, then its setting value is 5.6A. Note that its range is 2-9.9A for products without auxiliary voltage, with a step difference of 0.1A.
2. K-value setting of inverse time characteristic curve: The K-value setting switch is the leftmost third group of dip switches (two in total), with the left one representing level 1; The one on the right represents level 0.1. The setting range of K value for this product is 0.1~9.9. For example, if its value is set to 5.0, the overcurrent action value is set to 5.0, and the actual input current is 30A, then its delay time is 13.5 seconds. However, its speed break multiple value should be set to 6 times or more. 3. Quick multiple setting: The quick multiple selection switch is the second group of left dip switches, with a range of 2-9.9 times. The left dip switch represents 1 times, and the right dip switch represents 0.1 times. When its value is 3 or 0, it is 3 times. If the current is set to 2.6A and the speed multiplier is 3 times, when the current reaches 3 × 2.6=7.8, it will act directly without delay. Note that products without auxiliary power supply must be powered off before returning.
4. Precautions for use
a�� Attention should be paid to the testing method for products without auxiliary power supply: When using a transformer as a current source, it is required that the secondary turns of the transformer are equivalent to those of the current transformer. Otherwise, significant errors may occur due to impedance mismatch. When testing the speed of the quick action, if the current on-off method is used for measurement, the internal working power supply of the relay requires a certain establishment time, which will cause significant errors. However, during normal operation, the speed will be much faster due to the existence of the working power supply. Similarly, when measuring delay time using the on-off method, there may also be product errors.
b�� Action indication for products without auxiliary power supply: After the quick break and delay exits of the relay, the action indicator light on the relay panel will maintain the action record; After the relay action returns, the action indicator light needs to be manually reset.

7�� Repair, maintenance, and storage
1. There are no special requirements for maintenance, that is, when the relay is not working properly or malfunctions, the staff will immediately replace it and send it to the factory for inspection.
2. Unused or spare relays should be stored in an environment with air circulation, temperature not exceeding+55 and not exceeding -25, and relative humidity not exceeding 90%. The warehouse should be free of acid, alkali, salt, corrosive or explosive gases, and should not be affected by dust, rain or snow.

8�� Example of setting

Example: The parameters of the feed pump motor are known as: rated voltage VeD=6KV, capacity PeD=2000kw, rated current IeD=230A, starting factor=6, current transformer ratio LH=300/5, and motor starting time of 20S. (Two phase difference wiring)
Using JGL inverse time overcurrent relay to protect its overload and quick break, the setting calculation is as follows:

1. The starting current of the protective device relay is

Explanation:

Kk - reliability coefficient, taken as 1.2 when the protection action is tripped or unloaded; The action signal is set to 1.05.
IeD - Rated current of electric motor.
Kjx - wiring coefficient of current transformer; If it is a three-phase complete star connection or a two-phase incomplete star connection, this value is 1. If it is a two phase difference wiring, Kjx=reflects the current during normal three-phase operation and three-phase short circuit; If Kjx=2 reflects the current when the current transformer is short circuited in two phases; If Kjx=1, it reflects the current when the other phase is short circuited with a current transformer.
Lh - Current Transformer Ratio
Kfh - is the return coefficient of the relay, generally taken as 0.9~1.
2. The speed determination value of the electric motor is

[current relay]JL-40 type current relay

2026-6-12 11:24:52

JL-40 current relay

[current relay]JLK series static type anti CT saturation current relay

2026-6-12 11:24:44

JLK series static anti CT saturation current relay

[current relay]DL-30 series current relay

2026-6-12 11:24:35

1 Purpose
The DL-30 series current relay is used as a starting element in overload and short-circuit protection circuits of motors, transformers, and transmission lines.

2 Structure and principle:
2.1 The relay is an electromagnetic type with instantaneous action. The magnetic system has two coils, and the coil heads are connected to the base terminals. Users can connect the coils in series or parallel as needed, which can double the setting of the relay.
2.2 The scale value and rated value of the relay nameplate. For current relays, the coil is connected in series (in amperes), and the pointer on the dial is rotated to change the reaction torque of the balance spring, thereby changing the action value of the relay.
2.3 Relay action: When the current rises to or exceeds the set value, the relay will act, closing the dynamic contact and disconnecting the dynamic contact. When the current drops to 0.8 times the set value, the relay returns, the dynamic contact opens, and the dynamic contact closes.
2.4 Relays have three structures: AllK, AllH, and A11Q, 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.

DL-31

DL-32

DL-33

DL-34

Figure 1 Internal wiring diagram of DL-30 series current relay (back view)

3 DL-30 series current relay technical data
3.1 The number of contacts is shown in Table 1.

model	Number of contact points
model	Dynamic combination	Dynamic interruption
DL-31	one
DL-32	one	one
DL-33	two	one
DL-34	one	two

3.2 Divided by the range of setting values: the action error of each setting value shall not exceed ± 6%, as shown in Table 2.

model	Maximum setting Current (A)	Rated current (A)		Long term allowable current (A)		Current setting Scope (A)	Action current (A)
model	Maximum setting Current (A)	Coil series connection	Parallel connection of coils	Coil series connection	Parallel connection of coils	Current setting Scope (A)	Coil series connection	Parallel connection of coils
<	zero point zero zero six four					Only a small scale	zero point zero zero three two	zero point zero zero six four
<	zero point zero one	zero point zero two	zero point zero four	zero point zero two	zero point zero four	0.0025��0.01	0.0025��0.005	0.005��0.01
<	zero point zero five	zero point zero eight	zero point one six	zero point zero eight	zero point one six	0.0125��0.05	0.0125��0.025	0��025��0��05
DL-31	zero point two	zero point three	zero point six	zero point three	zero point six	0.05��0.2	0.05��0.1	0.1��0.2
<	zero point six	one	two	l	two	0.15��0.6	0.15��0.3	0.3��0.6
	two	three	six	four	eight	0.5��2	0.5��1	1~2
DL-32	six	six	twelve	six	twelve	1.5��6	1.5��3	3~6
	ten	ten	twenty	ten	twenty	2.5��10	2.5��5	5~10
DL-33	fifteen	ten	twenty	fifteen	thirty	3.75��15	3.75��7.5	7.5��15
	twenty	ten	twenty	fifteen	thirty	5~20	5~10	10~20
	fifty	fifteen	thirty	twenty	forty	12��5��50	12.5��25	25~50
	one hundred	fifteen	thirty	twenty	forty	25~100	25~50	50~100
DL-34	two hundred	fifteen	thirty	twenty	forty	50~200	50~100	100~200

3.3 The maximum error of relay scale shall not exceed 6%.
3.4 The variation of action values shall not exceed 6%.
For DL-31, 32, 33, and 34 current relays, the return coefficient shall not exceed 0.8, and for maximum set currents of 200A, it shall not exceed 0.7.
3.6 Action time
3.6.1 When the action value is 1.1 times, the action time shall not exceed 0.12s; when the action value is 2 times, the action time shall not exceed 0.04s.
3.7 Overcurrent capability: When the coil is connected in series and rises uniformly from the set value to the maximum current listed in Table 3, the relay should not cause
Vibration caused by non functioning contact points. After five cycles, the relay still meets the requirements of this technical specification.
3.8 Overcurrent: When the setting value is increased by 1.75 times or higher, the dynamic contact of the relay should close without shaking.
When there is no external collision or vibration, and the working current at each setting position of the relay (except for the first point) is 0.6 setting value, its dynamic breaking contact should reliably close the circuit. '
3.10 Under action and return current: The movable system of the relay should not stagnate in the middle position.
3.11 When the relative humidity of the surrounding air is not greater than 85%, the circuit of the relay is insulated from the shell (non-conductive metal part on the shell)
The edge resistance should not be less than 300MF2 when measured with a 500V megohmmeter.
3.12 The insulation of the conductive part of the relay to the shell (non-conductive metal part on the shell) can withstand 50Hz AC voltage and 2kV calendar
A 1-minute experiment.
3.13 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 at a negative inductance
In a DC circuit with a time constant of no more than 5 × 10-3s, the load is 50W, and in an AC circuit, it is 250VA.
3.14 Power consumption
At the minimum setting value, the power consumed by the coil of the relay shall not exceed the data in Table 4.
When the surrounding medium temperature is+40 ��, the relay will not have insulation or other electrical components damaged during long-term operation under the long-term allowable current and voltage shown in Table 2 and Table 3, and the temperature rise of the coil will not exceed 60'K.
3.16 Lifespan: The relay has an electrical lifespan of 500 times and a mechanical lifespan of 5000 times.

model		Maximum setting current (A)		Maximum test current (A)
DL-31 DL-32 DL-33 Dl-34		zero point zero zero four nine		zero point zero two five
		zero point zero zero six four		zero point zero three two
		zero point zero one		zero point zero five
		zero point zero five		zero point two five
		zero point two		one
		zero point six		three
		two		ten
		six		thirty
		ten		fifty
		fifteen		seventy-five
		twenty		one hundred
		fifty		two hundred
		one hundred		two hundred
		two hundred		two hundred
series	Maximum setting value		Minimum setting value		Efficiency consumption at minimum setting value (VA)
DL-30	zero point zero zero six four		0.0064 (with only one dot scale)
	zero point zero one		zero point zero zero two five		zero point four
	zero point zero five		zero point zero one two five		zero point four
	zero point two		zero point zero five		zero point five five
	zero point six		zero point one five		zero point five five
	two		zero point five		zero point five five
	six		one point five		zero point five five
	ten		two point five		zero point eight
	fifteen		three point seven five		zero point eight
	twenty		five		zero point eight
	fifty		twelve point five		six
	one hundred		twenty-five		twenty
	two hundred		fifty

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 moving plate and the magnetic plate, contact between the coils of the balance spring, friction on the moving plate shaft, etc. To do so, set the pointer of the relay to the first setting point, manually rotate the movable system towards the magnetic plate direction, 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 that:
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.
When the pointer rotates from the first scale value to the final scale value, the coils of the balance spring are not magnetized.
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 changes the magnitude of the spring reaction force, and the adjustment of the maximum setting value mainly changes 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.

[current relay]DL-10Q series current relay

2026-6-12 11:24:27

1 Purpose
The DL-lOQ series current relay is used as a starting element in overload and short-circuit protection circuits of motors, transformers, and transmission lines.

2. Structure and operating principles.
The DL-lOQ series current relay adopts embedded installation, and the main body of the relay is a plug-in structure.
The main body of the DL-lOQ series current relay is the same as that of the DL-10 series current relay.
2.3 DL-lOQ series current relay is an electromagnetic instantaneous action system with two coils in the magnetic system. The coil heads are connected to the terminals of the relay base, and special connecting pieces are used on the bottom terminals of the housing to connect the coils in series or parallel, thus doubling the setting range of the relay.
The internal wiring diagram of the DL-10Q series current relay is shown in Figure 1.
The appearance and installation dimensions of the 2.5 DL-lOQ series current relay are shown in Figure 2.

DL-11Q DL-12Q DL-13Q
Figure 1 Internal wiring diagram of DL-10Q series relay (back view)

Figure 2: Outline and Installation Dimensions of DL-10Q Series Current 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); and 250VA (COS ��=0.4) in AC circuits.
3.2 Action time: For overcurrent and 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.
3.3 Dielectric Strength: The insulation of the conductive part of the relay to the housing should withstand an AC of 50Hz and a voltage of 2kV for a test duration of 1 minute.
The weight of the relay is approximately 1.5kg.
The technical data of the 3.5 current relay is listed in the table.

model

Maximum setting value (A)

Setting range (A)

Coil series connection

Parallel connection of coils

Power consumed at the first set current (VA)

Contact specifications

return coefficient

Action current (A)

Thermal stability current (A)

Action current (A)

Thermal stability current (A)

Dynamic combination

Dynamic interruption

long-term

DL��11Q

DL��12Q

DL��13Q

0��01

0��0025

��

0��01

0��0025

��

0��05

0��02

zero point six

0��005

��

0��01

0��04

1��2

0��08

one

0��8

DL��11Q

DL��12Q

DL��13Q

0��04

0��01

��

0��04

0��01

��

0��02

0��05

1��5

0��02

��

0��04

0��1

three

0��08

one

DL��11Q

DL��12Q

DL��13Q

0��05

0��0125

0��05

0��0125

0��25

0��08

2��5

0��025

0��5

0��16

five

0��08

one

DL��11Q

DL��12Q

DL��13Q

0��2

0��05

��

0��2

0��05

��

0��1

0��3

twelve

0��1

��

0��2

0��6

twenty-four

0��1

one

DL��11Q

DL��12Q

DL��13Q

0��6

0��15

��

0��6

0��15

��

0��3

one

forty-five

0��3

��

0��6

two

ninety

0��1

one

DL��11Q

DL��12Q

DL��13Q

two

0��5

��

two

0��5

��

one

four

one hundred

one

��

two

eight

two hundred

0��1

one

model

Maximum setting value

��A��

Setting range

��A��

Coil series connection

Parallel connection of coils

Power consumed at the first set current (VA)

Contact specifications

return

coefficient

Action current

��A��

Thermal stability current

��A��

Action current

��A��

Thermal stability current

��A��

Dynamic combination

Dynamic interruption

long-term

DL��11Q

DL��12Q

DL��13Q

six

one point five

��

six

one point five

��

three

ten

three hundred

three

��

six

twenty

six hundred

0��1

one

0��8

DL��11Q

DL��12Q

DL��13Q

ten

two point five

��

ten

two point five

��

five

ten

three hundred

five

��

ten

twenty

six hundred

0��15

one

DL��11Q

DL��12Q

DL��13Q

twenty

five

��

twenty

five

��

ten

fifteen

three hundred

ten

twenty

thirty

six hundred

0��25

one

DL��11Q

DL��12Q

DL��13Q

fifty

twelve point five

��

fifty

twelve point five

��

twenty-five

twenty

four hundred and fifty

twenty-five

��

fifty

forty

nine hundred

one

DL��11Q

DL��12Q

DL��13Q

one hundred

twenty-five

��

one hundred

twenty-five

��

fifty

twenty

four hundred and fifty

fifty

��

one hundred

forty

nine hundred

2��5

one

DL��11Q

DL��12Q

DL��13Q

two hundred

fifty

��

two hundred

fifty

��

one hundred

twenty

four hundred and fifty

one hundred

��

two hundred

forty

nine hundred

ten

one

zero point seven

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

[current relay]DL-10 series current relay

2026-6-12 11:24:18

1 Purpose
The DL-10 series current relay is used as a starting element for overload and short circuit protection in motors, transformers, and transmission lines.

Overview of Structure 2
2.1 The relay system is electromagnetic instantaneous action, with two coils in the magnetic system. The coil leads are connected to the terminals of the relay base, and a connecting piece (factory accessory) can be used to change the series connection of the coils to parallel connection, thereby doubling the setting range of the relay. The internal wiring diagram of the relay is shown in Figure 1.
The relay is installed on a vertical panel and can be wired in front of or behind the board.

According to this, DL-11 DL-12 DL-13
Figure 1 Internal wiring diagram of DL-10 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 is not greater than 5 × 10-3s); in AC circuits (COS ��=0.4), it is 250VA.
3.2 Action time: When the setting value is 1.1 times, the action time shall not exceed 0.12s; when the setting value is 2 times, the action time shall not exceed 0.04s.
3.3 Dielectric Strength: Each circuit of the relay should withstand a test of AC 50Hz, voltage 2kV, and duration of 1 minute between non charged metal parts.
The weight of the relay is approximately 1 kg.
The other main technical data of the 3.5 current relay are shown in Table 1.
3.6 The appearance and installation hole size of the relay are shown in Figure 2 and Figure 3 respectively. ·

4 Ordering Instructions
Please indicate when placing an order
4.1 Model and name of relay.
4.2 Maximum current setting value.
4.3 Wiring method: (pre board wiring or post board wiring). If not specified, provide accessories for wiring behind the board.

model

maximum

set value

��A)

tuning

scope

��A��

Coil series connection

Parallel connection of coils

At the minimum setting

Power at current

Consumption (VA)

Contact type

return

coefficient

Action current

��A��

Thermal stability current A

Action current

��A��

Thermal stability current A

Dynamic combination

move

sever

long-term

DL��11

DL��12

Dl��13

zero point zero one

zero point zero zero two five

zero point zero one

zero point zero zero two five

zero point zero zero five

zero point zero two

zero point six

zero point zero zero five

zero point zero one

zero point zero four

one point two

zero point zero eight

one

zero point eight

DL��11

DL��12

DL��13

zero point zero four

zero point zero one

zero point zero four

zero point zero one

zero point zero two

zero point zero five

one point five

zero point zero two

zero point zero four

zero point one

three

zero point zero eight

one

DL��11

DL��12

DL��13

zero point zero five

zero point zero one two five

zero point zero five

zero point zero one two five

zero point zero two five

zero point zero eight

two point five

zero point zero two five

zero point zero five

zero point one six

five

zero point zero eight

one

Dl��11

DL��12

DL��13

zero point two

zero point zero five

zero point two

zero point zero five

zero point one

zero point three

twelve

0.1��0.2

zero point six

twenty-four

zero point one

one

DL��11

DL��12

DL��13

zero point six

zero point one five

zero point six

zero point one five

zero point three

one

forty-five

0.3��0.6

two

ninety

zero point one

one

DL��11

DL��12

DI��13

two

0.5��2

0.5��1

four

one hundred

1-2

eight

two hundred

zero point one

one

DL��11

DL��12

DL��13

six

1.5��6

1.5-3

ten

three hundred

3-6

twenty

six hundred

zero point one

one

DL��11

DL��12

DL��13

ten

2.5��10

2.5��5

ten

three hundred

5��10

twenty

six hundred

zero point one five

one

DL��11

DL��12

DL��13

twenty

5��20

5��10

fifteen

three hundred

10��20

thirty

six hundred

zero point two five

one

DL��11

DL��12

DL��13

fifty

12.5��50

12.5��25

twenty

four hundred and fifty

25-50

forty

nine hundred

one

DL��11

DL��12

DL��13

one hundred

25��100

25��50

twenty

four hundred and fifty

50��100

forty

nine hundred

two point five

one

DL��11

DL��12

DL��13

two hundred

50��200

50-100

twenty

four hundred and fifty

100��200

forty

ninety

ten

one

zero point seven

Figure 2: The external dimensions of the DL-10 series relay are front board wiring and rear board wiring

DL-10 series current relay

[current relay]BFL-2B type negative sequence current relay

2026-6-12 11:24:10

Purpose:
BFL-2B negative sequence current relay is used in the relay protection circuit of generators and transformers as a starting element to reflect the negative sequence component of fault current in case of asymmetric short circuit.

Working Principle:
2.1 The block diagram is shown in Figure 1.
2.2 The operating principle of the relay is described as follows:
Negative sequence current filter: It consists of two converters LHA and LHBC without air gaps, capacitors C1 and C7, and potentiometer R9. The wiring diagram is shown in Figure 2.
The voltage (UR9) on R9 is proportional to the A-phase current and has a phase that is essentially the same; The voltage on C7 (UC7) is directly proportional to the difference in BC phase current, with a phase lag of 90. The BC phase adopts capacitor (C7) phase shifting, which has the main advantage of a good output voltage waveform (basically a sine wave), thus reducing the unbalanced voltage of the negative sequence current filter during system oscillation.
In the case of positive sequence current, the voltage generated by the LHA secondary current ia on potentiometer R9 is in phase with the A-phase current IA, and the voltage generated by the LHBC secondary current ibc on capacitor C7 lags behind the BC phase current by 90. If UR9 and UC7 are made equal in size, the output voltage U1mn of the filter is close to zero, U1mn=UR9+UC7 �� 0, as shown in the vector diagram in Figure 3 (a). C1 is used to compensate for angular errors caused by iron loss.
In the case of negative sequence current, the voltages UR9 and UC7 on potentiometer R9 and capacitor C7 are equal in magnitude and direction. The output voltage of the filter (U2mn) is twice UR9, where U2mn=UR9+UC7 �� 2UR9. The vector diagram is shown in Figure 3 (b).
In order to avoid the output of the filter when there is zero sequence component in the fault current, a 3IO winding is added to the LHA, with 1/3 of the turns of the A-phase winding, connected to the zero line of the current transformer; LHBC reflects the difference in BC phase current and is not affected by zero sequence current.
Transistor execution circuit:
The output voltage of the filter is applied to the trigger after passing through the bridge rectifier (D1-D4) and the impedance capacitance filter circuit (C2, R2). Under normal circumstances, BG1 is conductive, BG2 is conductive, and the actuator CJ does not operate. When an asymmetric short circuit occurs, the filter has an output voltage. When it reaches the set value, the trigger flips, that is, BG1 is conductive, BG2 is conductive, and the actuator CJ operates. Adjusting potentiometer R10 can change the setting value of the relay.
The principle wiring diagram of BFL-2B negative sequence current relay is shown in Figure 4.

Main technical parameters:
3.1 AC rated values: 5A, 1A, 20Hz.
3.2 DC rated voltage: 220V, 110V, 48V.
3.3 Negative sequence operating current adjustment range: 1-6A (rated 5A), 0.1-1A (rated 1A) continuously adjustable, with an operating value variation of no more than 6%.
3.4 Relays are allowed to pass 1.1 times the rated current for a long time.
3.5 Power consumption: Under rated current, the power consumption of each phase in the relay AC circuit shall not exceed 2VA. The power consumption of the DC circuit shall not exceed 6W at 220V, 4W at 110V, and 2W at 48V.
3.6 DC power supply variation: allowed to vary within the range of 80-110% at 220V and 110V; At 48V, it is allowed to vary within the range of 90-110%, and the relay should be able to work normally.
3.7 Temperature Influence: When the ambient temperature changes within the range of -10 �� to+50 ��, the difference between the negative sequence operating current at any set point of the relay and the negative sequence operating current at temperature+20 �� shall not exceed ± 10% of the latter.
3.8 Contact Form: One set of dynamic contact points.
3.9 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.
3.10 Electrical lifespan: 5000 cycles.
3.11 Weight: Approximately 1.3kg.

Wiring diagram behind the relay:
The BFL-2B negative sequence current relay has a protruding insertion structure (T-shaped).
The appearance and installation dimensions of BFL-2B negative sequence current 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.
4.3 AC rated current.

[current relay]JL8 series integrated circuit current relay

2026-6-12 11:24:01

Purpose:
The JL8 series integrated circuit current relay is a static, non directional, transient, AC current relay. Used as a starting element in power system transmission lines, motors, overload and short circuit protection. This series of products is an upgraded product designed specifically to replace DL series relays. It has high precision, low power consumption, fast action time, high return coefficient, and intuitive and convenient setting. Its setting range is 0.1A to 100A, and those with a setting range of 2A to 99.9A do not require a DC auxiliary power supply.

Relay model name:

Main technical parameters of JL8 series integrated circuit current relay:

3.1 Rated value
a) Rated AC current: 0.1A, 5A;
b) Frequency: 50Hz;
c) Rated auxiliary DC voltage: 48V, 110V, 220V.
3.2 Current Setting Range: 0.1A~100A (For setting ranges of 2A~99.9A, no auxiliary power supply is required)
3.3 Power consumption
1) At rated auxiliary DC voltage:
a) AC circuit power consumption: not exceeding 1.5VA;
b) DC circuit power consumption: not exceeding 4W.
2) Under the condition of no rated auxiliary DC voltage, the AC circuit power consumption of the relay at rated current shall not exceed 1.5VA.
3.4 Allowable range of DC auxiliary voltage variation: 0.8-1.1 times the rated value at 220V and 110V, and 0.9-1.1 times the rated value at 48V.
3.5 Action time
a) When the setting value is 1.2 times, the action time should not exceed 25ms;
b) When the setting value is doubled, the action time should not exceed 20ms.
3.6 Return time: The return time shall not exceed 25ms.
3.7 Return coefficient: The return coefficient is not less than 0.85.
3.8 Setting error: Under reference conditions, the current setting error shall not exceed 5%.
3.9 Contact Performance
The relay contacts have a breaking capacity of 50W in DC inductive load circuits 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 AC circuits 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 each circuit of the relay and the exposed non electrified metal parts and circuits without electrical connection should not be less than 300MW.
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".

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 current relay according to the following table:

JL8 series integrated circuit current relay

[current relay]JL series integrated circuit current relay

2026-6-12 11:23:53

Purpose:

JL-10�� 20. The 30 series integrated circuit current relay is a static, non directional, transient, AC current relay. Can be used as a starting element in power system transmission lines, motors, overload and short circuit protection. Relays are not sensitive to the DC component in short-circuit currents, so they can be used in lines that require small transient exceedance. This relay is composed of integrated circuits, and its execution circuit has the characteristics of high sensitivity, fast action speed, low power consumption, and easy setting. The DC power supply and outlet relay of the relay are monitored by signal indicator lights, and the outlet relay has 2 sets of large capacity contact outputs. Users can directly control the protected equipment according to specific situations. The relay action value is set by the dial switch on the panel, which is intuitive and convenient.

Relay model name:
Note: (JL-10 represents protruding type, JL-20 represents protruding plug-in type, JL-30 represents embedded plug-in type) In order to facilitate users to replace various models of current relays, please refer to the table below for comparison

Working Principle:
The input current is converted into an appropriate voltage by a current voltage converter, and after setting 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, transient overtaking is also achieved, and it has strong anti-interference performance.

Usage:
Firstly, please carefully observe the panel of this relay, where the four ID setting switches in the upper left corner are used for rough adjustment of the relay's current value. For example, if you have a relay with K=4 in your hand, when the 1K switch is turned on and the other switches are turned off, the ID setting value is 1 × K=4A, and so on. You can obtain the setting values of 8A, 16A, and 32A through the other switches. If it cannot meet your needs, then use the MN dial switch in the lower left corner for fine adjustment. Please calculate according to the formula I=ID (1. MN) on the panel. The calculation method is as follows: If K=4, you need I=12A, you can first set the ID to 2K=8A. Then calculate M=5 and N=0 through the formula. After setting according to the above method, when the external current I=12A is applied, the right indicator light changes from green during normal operation to red, and the relay acts. The setting range is shown in the previous table.

Main technical parameters of JL series integrated circuit current relay:
5.1 Rated Value
a) Rated AC current: 0.1A, 1A, 5A;
b) Frequency: 50Hz;
c) Rated auxiliary DC voltage: 48V, 110V, 220V.
5.2 Setting range (see previous table)
5.3 Action time: When twice the set value, the action time should not exceed 30ms;
5.4 Return time: The instantaneous change in current from 1.2 times the set value to zero shall not exceed 45ms.
5.5 Action consistency: not greater than 2.5%.
5.6 Setting value error: not exceeding ± 2.5%.
5.7 Return coefficient: The overcurrent is not less than 0.9.
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.
5.1 Working conditions
a) Strong 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.
The insulation resistance between the housing of the 5.11 insulation resistance relay 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.
5.13 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 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:
8.1 Relay name and model;
8.2 Auxiliary DC voltage rating and current 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.

[current relay]JL18 series overcurrent relay

2026-6-12 11:23:45

JL18 overcurrent relay is suitable for overcurrent protection in power transmission systems with AC 50Hz, voltage up to 380V or DC voltage up to 440V, and current up to 630A. This relay has absorbed advanced technology from similar products at home and abroad, and has the advantages of reasonable and simple structure, small size, light weight, advanced technology, convenient adjustment of action value, large contact capacity, reliable action, and easy installation and maintenance. The product standard adopts the international standard IEC-337, and the main technical indicators have exceeded the corresponding indicators in IEC-337 and some economically developed countries in the world. The full range of products is complete, including AC/DC automatic reset, manual reset high return coefficient relays, and will replace relays such as JL14, JL15, JL17, etc.

JL18 series overcurrent relay

[current relay]JL15 series current relay

2026-6-12 11:23:36

1. Overview:
The JL15 series AC/DC relay is an electromagnetic relay with instantaneous overcurrent action, used in primary circuits with AC 50Hz, 380V and below or DC 440V and below, and current 1200A and below, as an overcurrent protection component in power transmission systems. This series of JL15-F AC high return coefficient relays is mainly used for rotor protection of AC asynchronous motors that operate per second.

2. Model parameters:

model	Type of current	Rated current of attraction coil le (A)	Adjustment range of attraction coil	Contact combination form	wiring method	remark
JL15-��/01 JL15-��/11 JL15-��S/01 JL15-��S/11 JL15-��/02 JL15-��/22 JL15-��S/02 JL15-��S/22 JL15-��F/01 JL15-��F/11	direct current or communication	one one point five two point five five ten fifteen twenty twenty-five forty sixty eighty one hundred one hundred and fifty two hundred and fifty three hundred four hundred six hundred eight hundred one thousand and two hundred	80-300%le 120-400%le 120-400%le	A normally closed One normally open A normally closed One normally open Two normally closed Two normally open Two normally closed Two normally open A normally closed One normally open A normally closed	60A and wiring in front of the board Front or rear wiring of 80A and below board	When the return coefficient is 0.6-0.85 for 600 and 1200A, and the set current is greater than twice the rated current, a decrease of 0.1 is allowed

3. Structural features:

4. Installation dimensions:

JL15 series current relay

[current relay]JL12 series overcurrent delay relay

2026-6-12 11:23:27

JL12 series overcurrent relay
1. Scope of application
The JLl2 series overcurrent delay relay is suitable for a voltage of 380V and a current of
In the circuit with a frequency of 50Hz from 5A to 300A, this relay is mainly used for lifting
The starting overload and overcurrent protection of wound motor in mechanical equipment.

2. Model

3. Main technical parameters
The rated current of the contacts of the relay is 5A, and the rated current specifications of the coils are: 5, 10, 15, 20, 30, 40, 50, 60, 75, 100, 150, 200, and 300A.
The characteristics of the relay should comply with the provisions in the following table after being annealed at an ambient temperature of -25 ° C to+40 ° C.

4. Use and maintenance
When the ambient temperature is -25~C -+40~C, the temperature change affects the viscosity of silicone oil, causing a change in the action time of the relay. Therefore, the adjustment screw at the lower end of the relay can be adjusted to meet special requirements.
The relay uses colorless transparent silicone oil as the damping liquid for the oil label. If the silicone oil deteriorates, it must be replaced with (201-100 methyl silicone oil) and cannot be replaced with other oils.
During repair, it was found that the rubber cap on the door stopper was damaged. It can be purchased from the manufacturer.

5. External dimensions and installation dimensions

JL12 series overcurrent delay relay

[current relay]JL14 series AC/DC current relay

2026-6-12 11:23:19

1. Overview:
The JL14 series AC/DC relays are mainly used as overcurrent or undercurrent relays in control circuits with AC voltage below 380V and DC voltage below 440V.

2. Model parameters:

model	Contact form	Rated current of attraction coil le (A)	Adjustment range of attraction coil	Contact combination form	remark
JL14-��Z JL14-��ZS JL14-��ZQ	direct current	one one point five two point five five ten fifteen twenty twenty-five forty sixty eighty one hundred one hundred and fifty three hundred four hundred six hundred eight hundred one thousand and two hundred one thousand and five hundred	70-300%le 30-65%le Or release current in 10-20%le Scope adjustment 110-400%le	Two normally open Two normally closed Two normally open A normally closed One normally open Two normally closed Two normally open Two normally closed One normally open A normally closed One normally open A normally closed	Hand to reset undercurrent, manual reset return coefficient greater than 0.65
JL14-��J JL14-��JS JL14-��JG	communication

3. Structural features:

4. Installation dimensions:

JL14 series AC/DC current relay

[current relay]JL-6A,JL-6C type current relay

2026-6-12 11:23:10

Purpose:
The JL-6 series integrated circuit current relay is a static, non directional, transient, AC current relay. Can be used as a starting element in power system transmission lines, motors, overload and short circuit protection. Relays are not sensitive to the DC component in short-circuit currents, so they can be used in lines that require small transient exceedance. This relay is composed of an integrated circuit to form an execution circuit, which has the characteristics of high sensitivity, fast action speed, low power consumption, and easy setting. The DC power supply and outlet relay of the relay are monitored by signal indicator lights, and the outlet relay has 2 sets of large capacity conversion contact outputs. Users can directly control the protected equipment according to specific situations (except for JL-6A). 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 current is converted into an appropriate voltage by a current 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 fast, and the transient overshoot is also small, with strong anti-interference performance.

Usage:
To use the JL-6C, 6A model, please carefully observe the panel of this relay. The four speed ID setting switch in the upper left corner is used for rough adjustment of the relay's current value. For example, if you have a relay with IN=5A in your hand, you can obtain the setting values of 0.1IN, 0.2IN, 0.4IN, 0.8IN, 1IN, 2IN, 4IN, and 8IN through the ID switch (see the figure below). 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 I=ID (1. MN) on the panel. The calculation method is as follows: If IN=5A, you need the operating current IN=15A. You can first set the ID to 2IN=10A, and then calculate M=5 and N=0 through the formula. After setting according to the above method, when the applied current I=15A, the right indicator light changes from green during normal operation to red, and the relay acts.

Main technical parameters of JL-6A and JL-6C current relays:
5.1 Rated Value
a) AC rated current: 0.1A, 1A, 5A;
b) Frequency: 50Hz;
c) Rated auxiliary DC voltage: 48V; 110V; 220V��
5.2 Setting range:
When IN=0.1A, it is 0.01A~1.59A;
When IN=1A, it is 0.1A~15.9A;
When IN=5A, it is 0.5A~79.6A.
5.3 Action time
a) When overcurrent is 1.2 times the set value: the action time is not more than 50ms;
b) When the low current is 0.8 times the set value, the action time should not exceed 50ms.
5.4 Return time
a) Overcurrent - The instantaneous change of current from 1.2 times the set value to zero shall not exceed 50ms;
b) Low current - The instantaneous change in current from 0.8 times to 1.2 times the set value should not exceed 30ms.
5.5 Action consistency: not greater than 1%.
5.6 Setting value error: not exceeding ± 5%.
5.7 Return coefficient: overcurrent not less than 0.92, low current not greater than 1.08.
5.8 Power consumption
AC power consumption: not exceeding 1VA at rated current.
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 is 5ms for an inductive load, the breaking capacity of the relay contacts is not more than 2A for AC voltage of 250V, and not more than 5A for DC voltage of 24V. (JL-6A: In a DC inductive circuit with a time constant of 40ms, the voltage is not more than 250V, the current is not more than 1A, and the breaking capacity of the contacts is 30W).
5.10 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) 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 housing of the 5.11 insulation resistance relay 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 The anti-interference performance complies with GB7261 and GB6261 "Electrical Interference Test for Static Relays and Protection Devices".

Wiring diagram behind the relay:
The wiring diagram on the back of the relay is shown in Figure 1 (the contacts in the diagram 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 diagram, while the contact state of the low current relay is exactly the opposite).

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 current setting range or rated current (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 JL-6A, 6C relay matching: relay base and several sockets (to be ordered separately).

[current relay]DL-20C series current relay

2026-6-12 11:23:02

The DL-20C series current relay is an electromagnetic instantaneous overcurrent relay used as a starting element in overload and short-circuit protection circuits of motors, transformers, and transmission lines.

DL-20C series current relay

[current relay]JL-10,JL-20,JL-30 series static current relay

2026-6-12 11:22:53

JL-10�� 20. The 30 series static current relay is used for relay protection of overload and short circuit in generators, transformers, and transmission lines, and can still operate correctly even after CT saturation in the power system.

JL-10, JL-20, JL-30 series static current relays