Shanghai Huabang Industrial Business Network - Low voltage protector

[Motor protector]GV2-ME32-101 type motor protector

2026-6-18 14:48:49

GV2-ME32-101 motor protector

[Motor protector]GV2-RS32-1 type motor protector

2026-6-18 14:48:40

GV2-RS32-1 motor protector

[Motor protector]GV2-ME80-1 type motor protector

2026-6-18 14:48:32

GV2-ME80-1 motor protector

[Motor protector]CB1 series control and protection switchgear

2026-6-18 14:48:23

The CB1 series control and protection switchgear (hereinafter referred to as CB1) integrates the main functions of circuit breakers, contactors, overload relays, and isolators. It has high short-circuit breaking capacity, long service life, good coordination and cooperation characteristics, complete protection functions, high intelligence level, simplified system design, easy installation and debugging, and energy-saving and material saving. It effectively reduces the types, specifications, and quantities of products in motor control systems, solves the problem of coordination and cooperation characteristics between discrete components, and is an ideal basic element in low-voltage distribution and control systems.

The CB1 series control and protection switchgear is mainly used for the control and protection of electric motors with AC 50Hz, rated working voltages of 400V and 690V, and rated currents ranging from 0.15A to 125A. It is suitable for frequent operation control and can connect, carry, and disconnect currents under normal conditions, including specified operating overload conditions. It can also connect and disconnect currents under specified abnormal conditions, such as short-circuit currents, within a specified time.

CB1 series rated working voltage AC400, 690V/50Hz
CB1 series rated working current 12A, 32A, 125A
The CB1 series has three poles
The CB1 series has isolation function
The CB1 series is classified as AC-43
The CB1 series has isolation function
The CB1 series meets the following standards
IEC60947-1 and GB 14048.1 General Provisions
IEC60947-6-2 and GB 14048.9 Control and Protection Switchgear (Equipment)
The CB1 series control and protection switchgear has obtained the national mandatory product certification CCC mark.

2. Normal usage conditions
The ambient air temperature ranges from -5 �� to+40 ��, and the average value over 24 hours does not exceed+35 ��;
The altitude of the installation site shall not exceed 2000m;
The relative humidity of the air shall not exceed 50% at a maximum temperature of+40 ��; Higher relative humidity is allowed at lower temperatures, such as reaching 90% at 20 ��. Special measures should be taken for occasional condensation caused by temperature changes;
The pollution level is level 3;
The installation category of the main circuit is III, and the auxiliary control circuit is II;
The CB1 series should be installed in a location that is free from explosive hazards, conductive dust, and is not capable of corroding metals or damaging insulation.

project			technical parameters
model			CB1-12				CB1-32		CB1-63	CB1-125
main circuit	Agreed free air heating current Ith (A)		twelve				thirty-two		sixty-three	one hundred and twenty-five
	Rated working current Ie (A)		twelve				thirty-two		sixty-three	one hundred and twenty-five
	Usage category		AC-43
	Rated working voltage Ue (V)		AC400��690/AC50Hz
	Rated insulation voltage Ui (V)		six hundred and ninety							eight hundred
	Rated impulse withstand voltage Uimp (kV)		six							eight
	polar number		three
	Rated operating short-circuit breaking capacity Ics (kA)	AC400V	fifty							one hundred and fifty
		AC690V	four							fifteen
	Total cutoff time (ms)		three
Intelligent controller (release device)	Rated current of release device Iet (A)		zero point six	one point four	five	twelve	eighteen	thirty-two	sixty-three	one hundred and twenty-five
	Set current range Ir1 (A)		0.15~0.6	0.35~1.4	1.25~5	3~12	4.5~18	8~32	32~63	63~125
	Code for setting current range		R1	R2	R3	R4	S1	S2	T	U
	The maximum rated power Pe (kW) of the controlled motor corresponding to Iet	AC400V	zero point one two	zero point three seven	one point five	five point five	seven point five	fifteen	thirty	fifty-five
		AC690V	zero point two five	zero point seven five	three	seven point five	eleven	twenty-two	thirty	one hundred and ten
Control characteristics	Rated control power supply voltage Us (V)		AC230/AC50Hz
	Maximum power consumption (W)		four						seven
	Action time (ms)	close	<85
		disconnect	<75
	Mechanical lifespan (10000 cycles)		one thousand and two hundred							five hundred
	Electrical lifespan (AC-43) (10000 cycles)	AC690V	four
		AC400V	one hundred and fifty				one hundred and twenty		one hundred
	Operating frequency (times/h)		1200 (load factor of 40%)						600 (load factor of 40%)	1200 (load factor of 25%)
auxiliary contact	Output quantity		ZA controller: 3NO3NC; ZL, ZP, ZM, ZF, EJ, EF, ES controllers: 1NO1NC
	output capacity		See sample for details
Shell protection level		front panel	IP40
		Wiring area	IP20							-
Note 1: When the rated working voltage is AC690V, a phase partition should be used; Note 2: At AC690V, the maximum operating currents of CB1-32 and 63 are 21A and 45A, respectively. The controller setting current Ir1 should not exceed the maximum operating current; Note 3: EJ, EF, and ES controllers are applicable to CB1-12 and 32.

[Motor protector]CD4 series motor control protector

2026-6-18 14:48:15

Mainly used for the protection and control of motors with rated operating voltage up to 690V and rated current ranging from 1.25 to 450A.
It has multiple control functions: direct start, Y/�� step-down start, resistance step-down start, autotransformer step-down start, reversible commutation start, and dual speed start
Communication function, using Modbus RTU communication protocol
Startup, control, and protection are integrated into the CPU, and communication between the field layer and control layer uses bus technology

The CD4 series motor control protector has overload protection, underload protection, locked rotor protection, unbalanced protection, phase failure protection, thermistor PTC protection, hourly starting frequency protection, external fault protection, ground fault protection or residual current protection, low voltage protection, overvoltage protection, underpower protection, and reverse sequence protection
The tripping levels of overload protection are divided into 10A, 10, 15, 20, 25, and 30, which can greatly optimize the use of electric motors
Built in CPU monitors the real-time status of the motor operation
Equipped with nine switch inputs and four relay outputs
Control protector complies with GB 14048.4 standard
The control protector has obtained the national mandatory product certification "CCC" mark

Main technical parameters of CD4 series motor control protector
Table 1 Basic Parameters of Control Protector

model		CD4-100R1	CD4-100R2	CD4-100R3	CD4-200S1	CD4-450T1
Rated working voltage Ue/V		AC50Hz/ 400��690
Rated insulation voltage U_i/V		one thousand
Rated impulse withstand voltage U_imp/kV		eight
Release level		10A��10��15��20��25��30
overload protection (Alarm or trip)	Set current Ir1/A	1.25~6.3	6.3~25	25~100	50~200	160~450
	Action time t1/s	Delay t1
Overload protection (Alarm or trip)	Action current Ir2/A	(20%~80%) Ir1+OFF
	Action time t2/s	1~30
locked-rotor protection (Alarm or trip)	Action current Ir3/A	(300%~800%) Ir1+OFF
	Action time t3/s	0.2~13
Current imbalance protection (Alarm or trip)	Imbalance degree �� I	20%~80%+OFF
	Action time t5/s	four
phase failure protection (Alarm or trip)	Imbalance degree �� I	90%~100%+OFF
	Action time t6/s	zero point one
PTC overheat protection (Alarm or trip)	Setting value k ��	3+OFF
	Action time t10/s	one
Hourly startup frequency protection (alarm or trip)	Number of actions (times)	1~30+OFF
Ground fault protection (Alarm or trip)	Action current Ir4/A	(40%~80%) Ir1+OFF
	Action time t4/s	0.1, 0.2, 0.3, 0.4
Residual current protection (Alarm or trip)	Action current I �� n/A	0.3/0.5/1/3/10 +OFF			0.5/1/3/10 /30 +OFF
	Action time/s	Non delayed
		delay
low voltage protection (Alarm or trip)	Setting value V	(65%��75%��85%)Ue+OFF
	Action time t7/s	0.5~20
overvoltage protection (Alarm or trip)	Setting value V	(105%��110%��115%)Ue+OFF
	Action time t8/s	0.1~20
Under power protection (Alarm or trip)	Setting value kW	(20%~95%)Pe+OFF
	Action time t9/s	0.5~25
Low voltage restart	Restarting voltage setting value V	(75%��85%��95%)Ue+OFF
	Immediately restart and lose power time t11/s	0.1~0.5
	Delay restart delay time t12/s	0.5~20

Table 2 Code for Setting Current Range

serial number	Current specification (A)	Code for setting current range	Setting current range (A)
one	one hundred	R1	1.25-6.3
two		R2	6.3-25
three		R3	25-100
four	two hundred	S1	50-200
five	four hundred and fifty	T1	160-450

[Motor protector]JD-5B motor comprehensive protector

2026-6-18 14:48:06

JD-5B motor comprehensive protector

[Motor protector]JD-5 motor comprehensive protector

2026-6-18 14:47:58

JD-5 motor comprehensive protector

Working power supply: AC220V 380V 50Hz
Rated current or rated power: Type A: 0.5-5A; Type C: 63-150A; Type B: 2-80A; Type D: 100-250A
Protection function: 1. Phase failure protection function 2. Overcurrent protection function
Display mode: LED indicator

[Motor protector]QZ20 series comprehensive protection starter

2026-6-18 14:47:49

The QZ20 series comprehensive protection starter is a new generation starter designed in accordance with the requirements of the national standard GB14048.4 and the equivalent use of IEC947-4-1

The QZ20 series comprehensive protection starter is suitable for infrequent direct starting and stopping of three-phase asynchronous motors with AC 50Hz, rated voltage 380V, and power up to 10KW. It has free tripping and dedicated overload tripping, which can effectively protect the motor from overload and phase failure. It is widely used as a motor protection switch for submersible electric pumps, threshers, cotton spinning machinery, cement mines, and general machinery.

[Motor protector]BHQ-Y type motor phase failure protector

2026-6-18 14:47:41

The BHQ type motor phase failure protector is a new product that was upgraded and replaced with protection devices in the 1990s. It has the advantages of high sensitivity, small size, easy use, and reliable operation. This product, when used in conjunction with a contactor, is unparalleled by other motor protection devices and is the most ideal motor protection device.

The BHQ-Y type phase failure protector works using the principle of electromagnetic magnetic response and current parameter balance control method. It can quickly cut off the power supply in case of phase failure of three-phase motors (such as power supply phase loss, fuse melting, etc.) within the rated current range, achieving the purpose of protecting the motor. This product has a wide range of applications, a simple structure, and stable performance. It has the advantages of shock resistance, temperature resistance, and moisture resistance. The rated minimum working current of the standard does not require maintenance for long-term use. The protector must work normally under the load and be in a phase loss state when not connected to the load. After long-term use, it has been proven that the use of protectors and the reduction of motor damage ensure normal production and have high practical value.

Technical Features
1. Environmental temperature: -20 �� --+50 ��
2. Voltage: Three phase 380V, 50Hz
3. Working time: less than 1 second
4. Work location: Any
5. Contact current: not less than 1A

[Motor protector]JDB-KM+ series electric motor intelligent protection monitoring system

2026-6-18 14:47:32

JDB-KM+series intelligent protection and monitoring system for electric motors

[Motor protector]RMD2 series motor protector

2026-6-18 14:47:24

Characteristics of RMD2 series motor protector

Can be equipped with a communication interface
Integrating measurement, protection, monitoring, operation, and control
Modular design structure, small size, compact structure
Fully equipped with intelligent protection functions

specification

Product Model	Rated current (A)	Rated working current of electric motor (A)
RMD2-2	two	045-2
RMD2-5	five	1-5
RMD2-25	twenty-five

RMD2 series motor protector

[Motor protector]JVRD Voltage Phase Sequence Protector

2026-6-18 14:47:15

Model name:
1. Full function protection series

2. No overvoltage or undervoltage protection series

Functional features:
Completely replaceable with Schneider RM4T structure
Compact appearance, rail installation
Phase loss protection �� Reverse phase protection �� Undervoltage protection �� Overvoltage protection �� Three phase voltage imbalance
Contact form: Two open and two closed

Application scenarios:
The product is widely used in industries such as central air conditioning, cranes, refrigeration equipment, compressors, distribution boxes, elevators, various (passenger and cargo) elevators, cranes, cranes, machine tools, controller equipment, etc

Voltage Range Selection Table:

Main technical parameters:

Structural characteristics:
1. The base of the protector adopts a guide rail type and is equipped with two M4 screw hole structures, which can be directly installed independently or installed on HT35 guide rails
If direct installation is used, the accessories on both sides of the bottom of the product need to be forcefully pushed out.
2. Indicator lights: Five indicator lights are used to indicate: normal, phase loss (voltage three-phase imbalance), reverse phase, overvoltage, undervoltage.
3. Dimensions: 79mm × 23mm × 79mm

Outline drawing and typical wiring diagram:

[Motor protector]SXB Phase sequence protector

2026-6-18 14:47:07

SXB series phase sequence protector
1 Overview
The SXB series phase sequence protector is mainly used for various fault detection of AC 50/60Hz, rated voltage below 460V, industrial three-phase 220V, 380V, 440V, 460V and other voltage levels. It provides relay protection for three-phase input power supply phase loss, reverse phase (phase sequence), etc. The product is widely used in air compressors, motors, distribution boxes, water pumps, oil pumps, central air conditioning units, electric control boxes, distribution cabinets, cranes, etc., such as central air conditioning compressor protection, power monitoring of various elevators, anti phase loss and reverse phase protection of water pumps and oil pumps, etc. It is an indispensable protection product for maintaining normal working voltage of industrial equipment during operation.

This product complies with the GB14085.5-2001 eqv IEC60947-1:1999 standard. Warning! This product is generally used for sampling the power side of three-phase power supplies and should not be installed on the output side of variable frequency power supplies!

2 Structural Features
1) Installation method: The protector base adopts a guide rail type, with two M4 screw hole structures inside, and can be installed independently or on HT35 guide rails.
2) Indicator lights: Three indicator lights are used to indicate: normal, phase loss (voltage three-phase imbalance), and reverse phase.
3) Dimensions: 79mm × 23mm × 79mm.
4 Protection Characteristics
1) Phase loss protection: Refers to a delay of 2 seconds in the event of a phase failure in either the operating or non operating state of the protected circuit.
2) Reverse phase protection: a protective measure to prevent the wrong phase sequence connection of L1, L2, and L3 three-phase AC, with a delay of 2 seconds.

5 Main Technical Data
1) Main circuit:
1) Rated voltage: 220VAC, 380VAC, 440VAC, 460VAC.
2) The connecting wire of the main circuit: insulated copper wire with a load area of 1.0-2.5mm. If a single strand of copper wire can be directly inserted into the terminal post; If a flexible wire is used, a pin type connector must be added to the wire to ensure reliable connection.
2) Auxiliary circuit:
1) It has two normally open and two normally closed contacts that are electrically inseparable.
2) Usage category: AC15, DC13
3) Contact capacity: 250VAC 6A, 30VDC 3A
4) Agreed heating current: 6A

6 Appearance and installation dimensions

[Motor protector]JVRD6-E Phase failure and phase mismatch protector

2026-6-18 14:46:58

JVRD6-E Phase Failure and Misalignment Protector (referred to as Protection Board), which is designed to provide reliable protection against phase failure and misalignment during the operation of electric hoists and cranes Specially designed for the internal matching of control boxes for electric hoists and cranes, with small size, simple wiring, easy installation, and improved safety and reliability, it is an indispensable protective product in industrial equipment operation.

model naming

[Motor protector]RD6-E Phase failure and phase mismatch protector

2026-6-18 14:46:49

I. Overview
RD6-E phase failure and phase mismatch protector (referred to as protection board), which is designed to provide reliable protection for phase failure and phase mismatch that occur during the operation of electric hoists and cranes.
Specially designed for the internal matching of control boxes for electric hoists and cranes, with small size, simple wiring, easy installation, and improved safety and reliability, it is an indispensable protective product in industrial equipment operation.

2�� Main technical parameters and functional characteristics

Features	Phase discontinuity and phase mismatch
rated voltage	200-500VAC
rated frequency	50/60HZ
Usage category	AC-15,DC-13
contact form	1. Normally open
Contact capacity	250VAC/5A,30VDC/3A
action delay	1 second action for phase interruption and misalignment

3�� Host interface and interface

4�� Typical wiring diagram

[Motor protector]UL-E20 series motor protector

2026-6-18 14:46:41

The UL-E20 series motor protector has symmetrical faults (such as overload, overcurrent, locked rotor) and asymmetrical faults (such as various phase breaks, current imbalances, phase to phase short circuits, turn to turn short circuits, etc.) as well as phase sequence, overvoltage, and undervoltage protection.

This motor protector has the characteristics of simple structure, complete functions, high precision, reliable action, convenient use, and small size. It is an ideal replacement product for thermal relays, especially suitable for harsh working environments and poor power grid quality.

Specifications and technical parameters
UL-E20 series motor protector model naming convention

*The basic function does not have phase sequence protection and overvoltage/undervoltage protection.
technical parameters

specification	five	twenty	eighty	three hundred and twenty
technical parameters
Current adjustment range (A)	1-5	4-20	16-80	64-320
Applicable motor power (kw) (380v)	0.5-2.5	2-10	8-40	32-160
Starting delay time (s)	2-20		4-40
Installation method	Card rail		Card rail
Overall dimensions	44(W)X63(D)X86(H)		88(W)X60(D)X115(H)
Main circuit wiring method	Pressure line type		Piercing style (20X32)
Output control terminal at COS Ø=0.4AC380V	Normally open (97, 98) 2A Normally closed (97, 98) 2A		Normally open (97, 98) 3A Normally closed (97, 98) 3A
Power consumption	Not exceeding 0.5W		Not exceeding 1W
Reset method	Power off reset		Power off reset or manual reset

performance metrics
1. Protection functions: phase failure, overload, overcurrent, locked rotor, three-phase current imbalance, phase sequence, overvoltage and undervoltage.
2. Overcurrent action characteristics: trip according to inverse time limit.
3. Current setting error: ��± 5%
4. Applicable frequency: 45~65Hz
5. Phase interruption action time: 2s
6. Phase sequence protection action time: 0.1s
7. Overvoltage and undervoltage protection: 380V -20% �� U �� 380V+10%
8. Unbalance protection: When the imbalance degree is �� 50% ± 10, the action time is 2 seconds; the three-phase current imbalance degree=[(maximum current value - minimum current value)/maximum current value] × 100%
9. Reset time: 20 minutes
10. Environmental temperature: -40 ��~+60 ��
11. Environmental humidity: �� 90% (25 ��)
12. Working power supply voltage: AC380V three-phase

UL-E20 series motor protector external dimensions:

[Motor protector]WDB Electric motor intelligent protector

2026-6-18 14:46:32

The WDB series has advanced fieldbus interfaces and is a motor protection and control device developed based on microprocessor technology. The protection and control functions of the motor are executed by the microprocessor, which completes the statistics of the number of motor operations, self diagnosis, and communication with the upper computer. WDB provides comprehensive protection for motors, avoiding production accidents caused by motor overload, overheating, locked rotor, undervoltage, light load, phase failure, three-phase imbalance, grounding and other possible faults, and maximizing the effectiveness and safety of equipment operation. WDB adopts RS485 communication interface design to ensure fast and reliable communication with the upper computer, PLC, DCS, and can quickly respond to real-time query requirements of the upper host and perform corresponding operations. Easy to use, safe and reliable.

protection function
Overcurrent protection, phase failure protection, three-phase unbalance protection, locked rotor protection, undervoltage protection, leakage protection, short circuit protection.

Display monitoring
Operating status, three-phase current, line voltage, leakage current, and fault information display

Fieldbus function
WDB has RS-485 remote communication interface, supports MODBUS-RTU, bus protocol, and is convenient for forming network systems with PLC, DCS, and backend machines. Real time control, monitoring of operational status parameters, and historical data queries of on-site equipment are carried out through the backend machine. WDB's monitoring and recording of motor operation status and fault causes greatly facilitates the development of motor maintenance plans and reduces equipment maintenance costs.

[Motor protector]WJB+1E Electric motor intelligent protector

2026-6-18 14:46:24

WJB+1E motor intelligent protector

[Motor protector]ULD-E2 series passive motor protector

2026-6-18 14:46:16

ULD-E2 series passive motor protector

[Motor protector]UL-E2 Passive motor protector

2026-6-18 14:46:07

UL-E2 Passive Motor Protector

[Motor protector]HSD1 series electronic motor protector

2026-6-18 14:45:58

Product Details

The HSD1 series electronic motor protector is suitable for use in the circuit of a single AC asynchronous motor with an AC frequency of 50Hz, rated voltage up to 380V, and rated current of 0.5A~500A. It can be combined with HSC1 series AC contactors (HSC1-9~25 can be plugged in) or other types of AC contactors to protect against overload, phase failure, three-phase imbalance and other faults that occur in the motor circuit during operation.

[Motor protector]JDB-LQ+F Electric Motor Intelligent Monitor

2026-6-18 14:45:50

Product Overview

JDB-LQ+is a motor protection and control device developed based on microprocessor technology with advanced fieldbus interfaces. The protection and control functions of the motor are executed by the microprocessor, which completes the statistics of the number of motor operations, self diagnosis, and communication with the upper computer. JDB-LQ+provides comprehensive protection for motors, avoiding production accidents caused by possible faults such as motor overload, overheating, locked rotor, undervoltage, light load, phase failure, three-phase imbalance, grounding, etc., and maximizing the effectiveness and safety of equipment operation. JDB-LQ+adopts a 4-20mA and RS485 communication interface design, ensuring fast and reliable communication with the upper computer, PLC, and DCS. At the same time, it can quickly respond to real-time query requirements of the upper host and perform corresponding operations. Easy to use, safe and reliable.
protection function
Thermal overload protection, explosion-proof motor Eexe thermal overload protection, phase failure protection, three-phase unbalance protection, locked rotor protection, undervoltage protection, ground fault protection, light load protection, and no-load protection.

control function
Direct starting, star delta starting, autotransformer step-down starting, multi-party starting control.

Display monitoring
Operating status, three-phase current, line voltage, leakage current, and fault information display
Fieldbus function
JDB-LQ has an RS-485 remote communication interface and supports MODBUS-RTU and PROFIBUS-DP bus protocols, making it easy to form network systems with PLCs, DCS, and backend machines. Real time control, monitoring of operational status parameters, and historical data queries of on-site equipment are carried out through the backend machine. JDB-LQ's monitoring and recording of motor operation status and fault causes greatly facilitates the development of motor maintenance plans and reduces equipment maintenance costs.

JDB-LQ+F Electric Motor Intelligent Monitor

[Motor protector]WJB+F Motor protection monitoring device

2026-6-18 14:45:41

Product Overview
WJB+is a motor protection and control device developed based on microprocessor technology with advanced fieldbus interfaces. The protection and control functions of the motor are executed by the microprocessor, which completes the statistics of the number of motor operations, self diagnosis, and communication with the upper computer. WJB+provides complete protection for motors, avoiding production accidents caused by motor overload, overheating, locked rotor, undervoltage, light load, phase failure, three-phase imbalance, grounding and other possible faults, and maximizing the effectiveness and safety of equipment operation. WJB+adopts RS485 communication interface design, ensuring fast and reliable communication with the upper computer, PLC, DCS, and can quickly respond to real-time query requirements of the upper host and perform corresponding operations. Easy to use, safe and reliable.
protection function
Thermal overload protection, explosion-proof motor Eexe thermal overload protection, phase failure protection, three-phase unbalance protection, locked rotor protection, undervoltage protection, ground fault protection, light load protection, and no-load protection.

control function
Direct starting, star delta starting, autotransformer step-down starting, multi-party starting control.

Display monitoring
Operating status, three-phase current, line voltage, leakage current, and fault information display

Fieldbus function
WJB+has RS-485 remote communication interface, supports MODBUS-RTU, bus protocol, and is convenient for forming network systems with PLC, DCS, and backend machines. Real time control, monitoring of operational status parameters, and historical data queries of on-site equipment are carried out through the backend machine. WJB+greatly facilitates the development of motor maintenance plans and reduces equipment maintenance costs by monitoring and recording the operating status and causes of faults of motors.

WJB+F motor protection monitoring device

[Motor protector]JD-6 type motor comprehensive protector

2026-6-18 14:45:32

Model parameters of JD-6 motor comprehensive protector

Current specification: 63-400A
Dimensions: 64 * 157 * 126

technical parameters

Wire hole diameter (mm)	��26
Protection time (s)
number of contacts	1 Conversion
Contact capacity	3A
Contact electrical lifespan	10*10
ambient temperature	-5~+40
working voltage	AC:220V��380V
Installation method	Installation type

Installation size wiring diagram

[Motor protector]HG-D type intelligent motor protector

2026-6-18 14:45:23

Overview

The HG-D intelligent motor protector series is suitable for frequent starting and stopping of three-phase squirrel cage asynchronous motors with AC 50 Hz or 60 Hz, rated voltage of 500 volts or less, and capacity of 20 kilowatts or less. Thermal circuit breakers provide protection against phase failure and overcurrent in electric motors. This product is widely used in various air pumps and is the preferred choice for controlling them.

Figure 10 Appearance and installation dimensions of HG-D intelligent electronic electric protector

[Motor protector]QZ610 series motor protection starter

2026-6-18 14:45:14

Overview
The QZ610 series motor protection starter is suitable for infrequent direct starting and stopping of three-phase asynchronous motors with AC 50 Hz, rated voltage 380 volts, and power up to 4 to 17 kilowatts. Equipped with thermal relay, instantaneous action device for phase failure, and shunt release, it can effectively protect the motor from overload and phase failure. It is widely used in submersible electric pumps, threshers, textile machinery, cement mining machinery, and general machinery motor protection switches.

QZ610 series motor protection starter

[Motor protector]QJZ3 Motor comprehensive protection starter

2026-6-18 14:45:06

The QJZ3 motor comprehensive protection starter (hereinafter referred to as the starter) is a new type of motor starter suitable for infrequent voltage reduction starting and stopping of three-phase squirrel cage induction motors with AC 50Hz voltage of 380V and power of 10-75kw. The starter is equipped with a reliable comprehensive protector, which provides reliable protection against phase failure, overload, and voltage loss of the motor.

QJZ3 motor comprehensive protection starter

[power protector]VJ-5 Digital voltage phase sequence relay

2026-6-18 14:43:06

VJ-5 voltage phase sequence multifunctional protector (three-phase AC protection relay)
Protection features:
Voltage display
Phase failure protection
Wrong phase protection
Overvoltage protection
Undervoltage protection
Timing and Counting
Fault Record
Dimensions: 80H × 40W × 54D

VJ5 digital voltage phase sequence relay is an intelligent multifunctional monitoring and protection instrument that integrates timing and counting functions with voltage display, overvoltage and undervoltage protection, phase loss protection, and phase sequence protection. It uses a powerful microprocessor chip and non-volatile storage technology, with a Chinese LCD display for intuitive display and easy operation. It can record operating parameters such as working time, working frequency, fault time, and fault frequency, display the power supply voltage in real time, and automatically cut off the power supply in case of overvoltage, undervoltage, phase loss, or phase error in the three-phase power supply, providing good protection.

VJ5 digital voltage phase sequence relay is suitable for real-time monitoring and protection of various frequently started equipment such as passenger and freight elevators, cranes, overhead cranes, and machine tools, accurately accumulating the number of equipment starts and running time. At the same time, it can monitor the power supply of the equipment, cut off the power supply in case of abnormal power supply, and record the number and cumulative time of power supply failures.

[power protector]JKBHQ-5 type overcurrent protector

2026-6-18 14:39:03

JKBHQ-5 overcurrent protector

[power protector]JKBHQ-5 three-phase power phase sequence protector

2026-6-18 14:38:54

JKBHQ-5 three-phase power phase sequence protector

[power protector]JQX-128MT three-phase power supply phase loss protector

2026-6-18 14:38:46

JQX-128MT three-phase power supply phase loss protector

[power protector]ABJ1-12W Phase failure and phase sequence protection relay

2026-6-18 14:38:29

ABJ1-12W phase failure and phase sequence protection relay

[power protector]ABJ1-14W Three phase AC protection relay

2026-6-18 14:38:18

The ABJ1 series three-phase AC protection relay (also known as three-phase power monitor, phase sequence protector, over-voltage protector, etc.) is mainly used for various fault detection of AC 50/60Hz, rated voltage below 460V, industrial three-phase 220V, 380V, 440V, 460V and other voltage levels. It provides relay protection for high voltage, low voltage, phase loss, reverse phase (phase sequence), three-phase voltage imbalance, etc. of the three-phase input power supply. The product is widely used in air compressors, electric motors, distribution boxes, water pumps, oil pumps, central air conditioning units, electrical control boxes, distribution cabinets, cranes, etc., such as central air conditioning compressor protection, power monitoring of various elevators, water pumps, oil pumps anti phase loss, reverse phase protection, etc. It is a maintenance equipment for industrial equipment operation. An essential protective product for normal working voltage.

ABJ1-14W three-phase AC protection relay complies with GB14085.5-2001 eqv IEC60947-1:1999 standard.
Warning! This product is generally used for sampling the power side of three-phase power supply and should not be installed on the output side of variable frequency current

[power protector]HYJ Three phase power supply monitor

2026-6-18 14:38:10

HYJ series voltage phase sequence multifunctional protector

1. Protection features
�� Dynamic phase loss and static phase loss protection: Refers to a delay of 2 seconds in action when any phase of the protected line experiences a phase failure, whether in operation or non operation. The form of the indicator light is: red light on and priority given;
�� Wrong phase protection: a protective measure to prevent the wrong phase sequence connection of L1, L2, and L3 three-phase AC, with a delay of 2 seconds. The indicator light form is: red light on;
�� Overvoltage protection: refers to the delay of 3-8S when the voltage of the protected circuit is higher than the set value. The indicator light form is: yellow light on;
�� Undervoltage protection: refers to the action of delaying 3-8S when the voltage of the protected line is lower than the set value. The indicator light is in the form of: yellow light on
�� Voltage imbalance protection: refers to a protective measure in which three-phase voltage imbalance will affect the safe operation of the line. When the voltage imbalance rate is greater than 10%, the action will be delayed for 2 seconds. The form of the indicator light is: the red light for phase loss is on, and priority is given.

2. Performance characteristics
�� The protection function of the protector is not affected by the current size of the line or load, the impact current, unbalanced current, and the nature of the load. Capable of long-term operation with full performance and all weather conditions. Power consumption not exceeding 10W;
�� There is no requirement for the motor wiring method when used for motor protection;
�� This product complies with GB/T 14048.1-2000, GB14048.5-2001 eqv IEC60947-1:1999;
�� The EMC of this product complies with the measurement methods and allowable values of radio interference characteristics in GB4343-1995.
3. Job characteristics
�� The three-phase wiring of L1, L2, and L3 is correct, the green light of the protector is on, and the internal relay is closed; If the phase sequence is connected incorrectly, the red light of the protector will light up. As long as any two phases of L1, L2, and L3 are exchanged, the protector can recognize the phase sequence and work normally. When the red light lights up and the internal relay does not close after the protected circuit is working normally, it should be considered as a phase sequence misconnection of the external circuit, and the protector has anti misconnection protection function;
�� When the three-phase overvoltage or undervoltage of L1, L2, and L3 occurs, the yellow light will turn on, the green light will not turn on, and the internal relay will release; When the voltage returns to normal, the green light is on and the internal relay is engaged;
�� L1, L2, and L3 are connected to three-phase AC voltage, while NO and COM are normally open contacts; NC and COM are normally closed contacts. Connect the wiring terminals directly using wires.
4. Installation method
�� The protector can be directly inserted into the 35mm TH standard installation track;
�� When installed in other situations, M2-M4 screws can be used to fix it.
5. Technical parameters
�� Environmental temperature: -25 ��~+55
�� Relative humidity:<90%
�� Contact voltage: 250VAC, 30VDC
�� Contact current: 6A
�� Dimensions: 79mm × 23mm × 79mm

[power protector]XJ11 Three phase AC protection relay

2026-6-18 14:38:01

XJ11 series voltage phase sequence multifunctional protector

1. Protection features
�� Dynamic phase loss and static phase loss protection: Refers to a delay of 2 seconds in action when any phase of the protected line experiences a phase failure, whether in operation or non operation. The form of the indicator light is: red light on and priority given;
�� Wrong phase protection: a protective measure to prevent the wrong phase sequence connection of L1, L2, and L3 three-phase AC, with a delay of 2 seconds. The indicator light form is: red light on;
�� Overvoltage protection: refers to the delay of 3-8S when the voltage of the protected circuit is higher than the set value. The indicator light form is: yellow light on;
�� Undervoltage protection: refers to the action of delaying 3-8S when the voltage of the protected line is lower than the set value. The indicator light form is: yellow light on;
�� Voltage imbalance protection: refers to a protective measure in which three-phase voltage imbalance will affect the safe operation of the line. Voltage imbalance rate=When 100% is higher than 10%, delay the action for 2 seconds. The form of the indicator light is: the red light for phase loss is on, and priority is given.
2. Performance characteristics
�� The protection function of the protector is not affected by the current size of the line or load, the impact current, unbalanced current, and the nature of the load. Capable of long-term operation with full performance and all weather conditions. Power consumption not exceeding 10W;
�� There is no requirement for the motor wiring method when used for motor protection;
�� This product complies with GB/T 14048.1-2000, GB14048.5-2001 eqv IEC60947-1:1999;
�� The EMC of this product complies with the measurement methods and allowable values of radio interference characteristics in GB4343-1995.
3. Job characteristics
�� The three-phase wiring of L1, L2, and L3 is correct, the green light of the protector is on, and the internal relay is closed; If the phase sequence is connected incorrectly, the red light of the protector will light up. As long as any two phases of L1, L2, and L3 are exchanged, the protector can recognize the phase sequence and work normally. When the red light lights up and the internal relay does not close after the protected circuit is working normally, it should be considered as a phase sequence misconnection of the external circuit, and the protector has anti misconnection protection function;
�� When the three-phase overvoltage or undervoltage of L1, L2, and L3 occurs, the yellow light will turn on, the green light will not turn on, and the internal relay will release; When the voltage returns to normal, the green light is on and the internal relay is engaged;
�� L1, L2, and L3 are connected to three-phase AC voltage, while NO and COM are normally open contacts; NC and COM are normally closed contacts. Connect the wiring terminals directly using wires.

[power protector]SVRD Single phase overvoltage and undervoltage protector

2026-6-18 14:37:53

Protection features:
Overvoltage protection
Undervoltage protection

Dimensions: 79H × 23W × 79D
Warning! This product is generally used for sampling the power side of single-phase power supplies and should not be installed on the output side of variable frequency currents!

Product Overview
The SVRD series single-phase overvoltage and undervoltage protector is mainly used for various fault detection of AC 50/60Hz, rated voltage below 250V, industrial single-phase 110V, 220V, 240V, 250V and other voltage levels. It provides relay protection for high and low voltage of single-phase input power supply. This product is an indispensable protection product for maintaining the normal working voltage of industrial equipment during operation. This product complies with the GB14048.5-2001 eqv IEC60947-1:1999 standard.

Voltage Range Selection Table

Contact form: Two open and two closed
Note: 1. Overvoltage and undervoltage protection will take about 3 seconds to activate
2. As this protector only protects against voltage and its phase sequence, it can be applied to devices of various powers.

structural characteristics
1. Installation method: The protector base adopts a guide rail type and is equipped with two M4 screw hole structures. It can be installed independently or on HT35 guide rails (if direct installation is used, the accessories on both sides of the bottom of the product need to be forcefully pushed out).
2. Indicator lights: Five indicator lights are used to indicate: normal, phase loss (voltage three-phase imbalance), reverse phase, overvoltage, undervoltage.
3. Dimensions: 79mm × 23mm × 79mm.

[power protector]DFY-6 Three phase power supply phase sequence protection counter

2026-6-18 14:37:44

The DFY-6 phase sequence protection counter is a multifunctional monitoring and protection instrument for three-phase power systems or three-phase electrical equipment. Integrating timing and counting, three-phase voltage display, overvoltage protection, undervoltage protection, phase loss protection (phase failure protection), and phase sequence protection (phase mismatch protection). Adopting Chinese LCD display, it has the characteristics of complete functions, stable performance, and easy operation.
The DFY-6 phase sequence protection counter can display the three-phase power supply voltage in real time, and can protect the contact control signal output by the circuit through relay output in case of overvoltage, undervoltage, phase loss, or phase error faults in the power supply, providing protection. It is a high-tech product that replaces traditional phase sequence relays and voltage relays.

Main functions
Display voltage: Display the current working voltage value.
Overvoltage protection: When the voltage is too high or too low, cut off the power supply of the equipment.
Phase loss protection: Cut off the power supply of the equipment when the three-phase power supply loses phase.
Wrong phase protection: Cut off the equipment power supply when the phase sequence of the three-phase power supply is incorrect.
Counting and timing: Record the number of times the device is started and the cumulative working time.
Fault record: Record the number of occurrences and cumulative time of faults.

Main technical parameters
Rated control voltage Us: phase voltage AC-220V, line voltage AC-380V
Power supply voltage error: -15%~+10%
Output contact capacity: 2A/250VAC
Working environment: Temperature -10C~50C
Humidity 85%, no condensation
Frequency: 50/60HZ
Weight: 85 grams
Data retention time: 10 years
Maximum counting capacity: 999999 times
Maximum timing capacity: 9999 hours and 59 minutes
Maximum counting speed: 5 times/second
Input signal: AC/DC voltage signal
Dimensions: 48 × 48 × 90mm (length × width × height)

Outline dimension diagram:

[power protector]DFY-5 Three phase power protection device (power phase sequence overvoltage/undervoltage protection device)

2026-6-18 14:37:36

DFY-5 power protector is a multifunctional monitoring and protection instrument for three-phase power systems or three-phase electrical equipment. Integrating three-phase voltage display, overvoltage protection, undervoltage protection, phase loss protection (phase failure protection), and phase sequence protection (phase mismatch protection). Adopting Chinese LCD display, it has the characteristics of complete functions, stable performance, and easy operation.
The DFY-5 power protector can display the three-phase power supply voltage in real time, and can provide users with alarm output and contact control signals for protection circuit action output through relay output in case of overvoltage, undervoltage, phase loss, or phase error faults in the power supply, playing an alarm and protection role. It is a high-tech product that replaces traditional phase sequence relays and voltage relays.

Main functions
Display voltage: Display the working voltage value
Overvoltage/undervoltage protection: When the voltage is too high or too low, cut off the power supply of the equipment.
Phase loss protection: Cut off the power supply of the equipment when there is a phase loss or severe imbalance in the three-phase power supply.
Phase sequence protection: Cut off the equipment power supply when the phase sequence of the three-phase power supply is incorrect.
Sound and light alarm: Sound and light prompts will occur when the above-mentioned faults occur.

Main technical parameters
Rated control voltage Us: phase voltage AC-220V, line voltage AC-380V
Power supply voltage error: -15%~+10%
Working environment: Temperature -10 ° C~50 ° C
Output contact capacity: 2A/250VAC
Frequency: 50/60HZ
Weight: 85 grams

Product dimension diagram:

Scope of application of the product
Mobile device control (on-site equipment, agricultural equipment, refrigerated trucks)
Central air conditioning unit
Oil pump
To protect personal safety and prevent reverse operation of equipment (such as lifting, transportation, elevators, escalators, etc.)
Prevent dangerous transmission loads (phase loss)
Normal/Emergency Power Switching

[power protector]MK1 series control and protection switchgear

2026-6-18 14:37:28

MK1 series control and protection switchgear
Product Overview
Shell current: 0.4A~100A
Rated working voltage: 50/60Hz, AC400V
Rated operating short-circuit breaking current: 35kA, 50kA
Derivative functions: leakage, isolation, communication, alarm unprotected
Start delay: adjustable from 0 to 99 seconds
Overcurrent protection: can be set on site
Undercurrent protection: adjustable on site, factory set to 60% Ie
Three phase unbalance (phase failure) protection: 20~75% adjustable, factory set to 75%

Product Features
It has three-stage protection including long delay, short circuit short delay, and short circuit instantaneous protection
It has functions such as phase failure, overcurrent, locked rotor, undercurrent, overvoltage, undervoltage, leakage, three-phase imbalance, isolation, and startup delay
Equipped with voltage display and current display functions;
Parameters can be set and queried
Equipped with fault memory function, convenient for fault query and maintenance;
Equipped with a 485 communication interface, it enables remote intelligent management.

Application scenarios
Widely applicable to distribution and motor protection and control systems in metallurgy, coal mining, steel, petrochemicals, ports, ships, railways and other fields; Motor Control Center (MMC); Lighting, power conversion, pumps, fans, air conditioning, fire protection, lighting and other electrical control and protection systems in modern buildings; Ports or railway systems (airports, railway passenger transport centers, etc.); Highway lighting or ventilation system; Fire pumps, fans, etc. for various occasions.

[power protector]JC- �� residual current operated protector

2026-6-18 14:37:18

Scope of application:
JC-II residual current action protector is a suitable product developed based on the renovation of rural low-voltage power grids. It provides comprehensive indirect protection and cuts off the power supply to ensure safety in the event of power grid faults such as wire falling into water or live wires. A leakage protection combination device consisting of a protector and an AC contactor is suitable for use in low-voltage (380V/200V) TT distribution systems where the neutral point of the power supply is directly grounded. It serves as the overall protection or sub protection for multi-level line protection.

[power protector]JDO/KBO series control and protection switchgear

2026-6-18 14:37:09

KBO is mainly used in power systems with AC 50Hz (6OHz), rated voltage up to 690V, and current ranging from 0.16A to 100A to connect, carry, and disconnect currents under normal conditions, including specified overload conditions, and to connect, carry, and disconnect currents under specified abnormal conditions (such as short-circuit currents).

3. Function:
KB0 adopts a modular single product structure, integrating the main functions of traditional circuit breakers (fuses), contactors, overload (or overcurrent, phase failure) protection relays, starters, isolators, etc. It has remote automatic control and local direct manual control functions, panel indication and electromechanical signal alarm functions, and coordinated time current protection characteristics (with inverse time limit, timed limit, and instantaneous three-stage protection characteristics). By selecting functional modules or accessories as needed, control and protection can be achieved for general (infrequent starting) motor loads, frequent starting motor loads, and distribution circuit loads.

Product type:
The configuration of KBO basic products is shown in Figure 1-3, and the electrical schematic of basic products is shown in Figure 1-4.
Reversible Control and Protection Switchgear KBON: Using KBO basic type as the main switch, combined with mechanical interlocking and electrical interlocking accessories, it forms a reversible control and protection switchgear, suitable for reversible or bidirectional control and protection of electric motors.
Dual power automatic transfer switch electrical appliance KBOS: Products with a rated current of 100A and below use the KB0 basic type as the main switch, combined with voltage relays, mechanical interlocks, electrical interlocks, and other accessories to form a CB level to PC level dual power automatic transfer switch electrical appliance ATSE; The ATSE with a rated current of 250A-630A is PC grade.
The pressure reducing starter KB0J, KB0J2, KB0Z, KB0R: KB0 is used as the main switch, combined with appropriate contactors, time relays, mechanical interlocks, electrical interlocks, and other accessories to form the Y-�� pressure reducing starter KB0J and the autotransformer pressure reducing starter KB0Z, which are suitable for pressure reducing starting control and protection of electric motors.
Dual speed controller KB0D: Using KB0 as the main switch, combined with appropriate contactors, mechanical interlocks, and electrical interlocks, it forms a dual speed controller suitable for starting control and protection of dual speed motors.
Three speed controller KB0D3: Using KB0 as the main switch, combined with appropriate contactors, mechanical interlocks, and electrical interlocks, it forms a dual speed controller suitable for starting control and protection of dual speed motors.
The protection control box XBK1: KB0 serves as the main switch and is installed in a standard protection box to form a power terminal box, suitable for outdoor and remote control and protection of individual loads.
Derivative types: fire protection type (F type), isolation type (G type), plug-in board wiring (R type), etc.

Applicable fields of KB0:
KBO has the advantages of functional integration, modular structure, small size, high protection level, high breaking capacity, short arcing distance, long service life, continuous operation, high reliability, and easy installation, use, and maintenance operation. It is particularly suitable for motor control and protection systems in metallurgy, coal mining, steel, petrochemicals, ports, ships, railways, and other fields. Electrical control and protection for lighting, power conversion, pumps, fans, air conditioning, etc. in modern buildings.
Motor Control Center (MCC), especially for intelligent electrical control systems or MCC with high breaking capacity requirements (such as distribution and protection systems that require Icu or Ics to reach 80kA). Single machine control and protection in factories or workshops (equivalent to power terminals).

Main parameters:
Two external dimensions (frame codes C and D respectively)
The number of poles in the main circuit is divided into three poles and four poles.
Rated current level of the main body; 12A 16A 18A 32A 45A63A 100A.
The setting current range covered by the overload release (controller) that can be equipped: minimum setting current 0.16A, maximum setting current 100A
Short circuit breaking capacity level: Economic type (C) 35kA. Standard type (Y) 50kA. High breaking type (H) 80kA
The expected breaking time under short-circuit current is 2-3ms, with a current limiting coefficient below 0.2.
Form of overload release:
According to the working principle, it can be divided into: thermal magnetic release (including basic and fire protection types, M P F L, etc.) intelligent controller
Electronic controllers are divided into motor protection and distribution protection according to the protected objects, and are classified into frequent operation and infrequent operation according to the operating frequency
C. The external dimensions and installation methods of the D-frame thermal magnetic release, intelligent controller, and electronic controller are completely consistent. (ID-357715118443535)

[power protector]BDS series single-phase three-phase common mode power supply protector

2026-6-18 14:37:00

Product Description
Single phase and three-phase common mode surge protectors are mainly used in places with severe power grid interference, which can effectively suppress peak interference and induced lightning waves in the power grid. They mainly provide comprehensive protection for the common mode and differential mode of phase lines, neutral lines to ground, and phase lines to neutral lines required by TT and TN-S distribution systems, and are used for first and second level protection.

Model Description

Product wiring diagram

BDS series single-phase three-phase common mode power supply protector

[surge protector]QYH-1M type surge current suppressor

2026-6-18 12:35:31

QYH-1M Surge Current Suppressor

[surge protector]QSM1-2805P-V(1NH281M-5P) type surge suppression module

2026-6-18 12:35:23

QSM1-2805P-V (1NH281M-5P) Surge Suppression Module

[surge protector]QSM1-2805-VM,QSM1-2805-VL(1NH281M-5) type surge suppression module

2026-6-18 12:35:14

QSM1-2805-VM, QSM1-2805-VL (1NH281M-5) Surge Suppression Module

[surge protector]QSM1-2803P-V(1NH281M-3P) type surge suppression module

2026-6-18 12:35:06

QSM1-2803P-V (1NH281M-3P) Surge Suppression Module

[surge protector]QSM1-2803-V(1NH281M-3) type surge suppression module

2026-6-18 12:34:57

QSM1-2803-V (1NH281M-3) Surge Suppression Module

[surge protector]QSM1-2802P-V(1NH281M-2P) type surge suppression module

2026-6-18 12:34:48

QSM1-2802P-V (1NH281M-2P) Surge Suppression Module

[surge protector]QSM1-2802-V(1NH282M-2) type surge suppression module

2026-6-18 12:34:39

QSM1-2802-V (1NH282M-2) Surge Suppression Module

[surge protector]QSM1-2801P-V(1NH281M-1P) type surge suppression module

2026-6-18 12:34:31

QSM1-2801P-V (1NH281M-1P) Surge Suppression Module

[surge protector]QSM1-2801-V(1NH281M-1) type surge suppression module

2026-6-18 12:34:22

QSM1-2801-V (1NH281M-1) Surge Suppression Module

[surge protector]QYH-2M type surge current suppressor

2026-6-18 12:34:14

QYH-2M Surge Current Suppressor

[surge protector]LXDU8 series surge protector

2026-6-18 12:34:05

Characteristics of LXDU8 series surge protectors
Protect against indirect lightning effects, direct lightning effects, or other transient overvoltage surges
Pluggable type
Display the working status through the mechanical indicator window
Equipped with common mode (MC) and differential mode (MD) protection modes

LXDU8 series surge protector specifications

Product Model	Maximum discharge current Imax kA	Voltage protection level Up kV
LXBU8-��/20-385	twenty	��1.5
LXBU8-��/40-420	forty	��2.0
LXBU8-��/60-420	sixty	��2.5
LXBU8-��/80-420	eighty	��3.0

[surge protector]RCG-3000 High frequency absorber

2026-6-18 12:33:57

The RCG-3000 high-frequency absorber is suitable for use in voltage circuits with AC 380V, 660V, 1140V, and a frequency of 50Hz. The product forms include RC resistance capacitance absorber, Z varistor absorber, and ZRC varistor combined with resistance capacitance absorber.

RCG-3000 High Frequency Absorber Product Model

serial number	model	Component composition	schematic diagram	explanation
one	RC-660 Resistance Capacity Absorber	R·C	Figure 1 (a)	Used for 660V system
two	RC-1140 Resistance Capacity Absorber	R·C	Figure 1 (a)	Used for 1140V system
three	RC-660 Resistance Capacity Absorber	R·C	Figure 1 (b)	Used for 660V system
four	RC-1140 Resistance Capacity Absorber	R·C	Figure 1 (b)	Used for 1140V system
five	ZRC-1140 overvoltage absorber	Z·R·C	Figure 1 (c)	Without neutral point outlet, used for 660V
six	ZRC-1140 overvoltage absorber	Z·R·C	Figure 1 (c)	Without neutral point outlet, used for 1140V
seven	ZRC-660-0 overvoltage absorber	Z·R·C	Figure 1 (d)	Equipped with a neutral point outlet for 660V
eight	ZRC-1140-0 overvoltage absorber	Z·R·C	Figure 1 (d)	Equipped with a neutral point outlet for 1140V
nine	RC-3300 Resistance Capacity Absorber	R·C	Figure 1 (e)	Used for 3300V system
ten	RC-6000 Resistance Capacity Absorber	R·C	Figure 1 (e)	Used for 6000V system

[surge protector]SRMB1 Surge protector

2026-6-18 12:33:48

The SRMB1 surge protector (hereinafter referred to as the "protector") is suitable for use in power supply systems (or communication systems) such as TT, IT, TN-S, TN-C with AC 50/60Hz and rated voltage up to 380V, to protect against indirect lightning and direct lightning effects or other transient overvoltage surges.
The protector complies with GB18802.1 standard.

One Normal working conditions
1. The altitude shall not exceed 2000m;
2. Surrounding air temperature: normal range: -5 �� to+40 ��, limit range: -40 �� to+70 ��;
3. Atmospheric conditions: The relative humidity should be between 30% and 90% at room temperature;
4. The inclination to the vertical plane shall not exceed 5 degrees;
5. Places without significant shaking and impact vibration;
6. In a medium without explosive hazards, and without gases and dust (including conductive dust) that corrode metals or damage insulation.

II Main technical parameters and performance
The main technical parameters of the protector are shown in Table 1 and Table 2, and the model of the zero ground protection module is SRMB1-NPE.

model specification	grid operation voltage Ue V	voltage protection level Up kV	Maximum discharge current Imax kA	Nominal discharge current In kA	leakage current Ic	response time t ns
SRMB1 ��-40	220/380	1.5/2.0	sixty	forty	< 1mA	< 25
SRMB1 ��-20		1.2/1.8	forty	twenty
SRMB1 ��-10			twenty	ten
SRMB1 ��-5			ten	five
SRMB1-NPE		one point two	forty	twenty	< 10��A	< 100

Note: (1) SPD series with Uc=140V, 320V, 385V, 550V have special specifications.
(2) The NPE protection module with Uc=420V is a special specification.

type	Operating voltage of power grid Ue V	Maximum continuous operating voltage Ue V	Voltage protection level Up kV		grounding system
			In=20��10��5kA	In=40kA
1P	two hundred and twenty	420/275	1.8/1.2	2.0/1.5	TN-C��IT
2P					TT��TN-S��IT
3P	three hundred and eighty	four hundred and twenty	one point eight	two	TN-C��IT
4P					TT��TN-S��IT
1P+N	two hundred and twenty	420/275	one point two	one point five	TT��TN-S��IT
3P+N	three hundred and eighty

2. Failure to disconnect device
The module of the protector is equipped with a failure disengagement device. When the protector fails due to overheating or breakdown, the failure disengagement device can automatically disconnect it from the power grid and provide an indication signal. When the protector is normal, the label displays green, and after failure disengagement, the label displays red.
3. Basic parameters
(1) Maximum continuous operating voltage Uc: A.C.140275230385420550V;
(2) Protection level: B, C, D;
(3) Protection level Up: 1.2, 1.5, 1.8, 2.0kV;
(4) Maximum discharge current (8/20 �� S) Imax: 10, 20, 40, 60kA;
(5) Nominal discharge current (8/20 �� S) In: 5, 10, 20, 40kA.

III Main structure and working principle
In a three-phase four wire system, three phase wires and one neutral wire are all connected to the grounding wire with a protector. Under normal circumstances, the protector is in a high resistance state. When the power grid experiences surge overvoltage due to lightning strikes or other reasons, the protector will immediately conduct rapidly in nanoseconds, introducing the surge overvoltage into the ground and protecting the electrical equipment on the power grid. When the surge voltage passes through the protector and disappears, the protector returns to a high resistance state, so as not to affect the normal operation of the power grid.

4 Installation
1. The protector is installed on a standard TH35-7.5 track.
2. The protector is connected by copper wire, with a cross-sectional area of: flexible wire: 2.5-16mm2; Hard wire: 2.5-25mm2. There are two wiring methods:
a) Connect the power switch to the protector, and then connect the protector to the load end. This method is suitable for distribution boxes with load currents below 100A. The cross-sectional area of the wire should be selected according to the load current.
b) From the power switch connection to the protector, and also from the power switch connection to the load end. This method is suitable for distribution boxes with a load current of 100A or more. The cross-sectional area of the wire connected to the protector is not affected by the load current, but the length must not be too long and the total length of the grounding wire must not exceed 500mm2.
3. The grounding wire should use a dual color wire of 4mm2 or more.
To prevent the failure of surge protectors from affecting the normal operation of the power grid, a 32A fuse should be connected in series to the protector connected to the L line;

Five Adjustment, use, and maintenance
1. The protector does not need to be adjusted after installation as required;
2. As long as the protector is installed properly, it can automatically protect the power grid;
3. During operation, it is necessary to regularly check whether the module label is red and observe whether the red indicator light of the fuse is on. Failure components should be replaced in a timely manner.

VI Ordering Instructions
When placing an order, the model and quantity should be indicated. For example: 4 SRMB1 II-40/2P units
2. The following documents are included with the product packaging box during shipment:
a) 1 copy of product qualification certificate (for each product)
b) 1 copy of user manual (for each product)
c) 1 copy of packing list (for each large packaging box)

[surge protector]YBK-B(SPD) series surge protector

2026-6-18 12:33:39

The YBK-B (SPD) series surge voltage protector is suitable for power supply systems such as TT, IT, IT-S, TN-C, TN-C-S, etc. with AC 50/60Hz, 230/400V and below. It can release 100KA lightning current and is usually installed in the low-voltage main distribution cabinet of building incoming lines.

[surge protector]YBK-D(SPD) series surge protector

2026-6-18 12:33:31

The YBK-D (SPD) series surge voltage protector is suitable for power supply systems such as TT, IT, TN-S, TN-C-S with AC 50/60Hz, 230/400V and below. Used to protect low-voltage electrical appliances from surge currents caused by atmospheric discharge (lightning) or switching processes. Corresponding surge protector products can be selected based on single-phase or three-phase power supply systems.

[surge protector]YBK-C(SPD) series surge protector

2026-6-18 12:33:23

YBK-C (SPD) series surge protectors are used for power supply systems such as TT, IT, TN-S, TN-C-S, etc. with AC 50/60Hz, 230/400V and below. Can be used as an equipotential connection during lightning strikes. Used to protect low-voltage electrical appliances from surge currents caused by atmospheric discharge (such as lightning) or switching processes. As a single voltage limiting device, it has a heavy-duty zinc oxide varistor.

[surge protector]RMU1 series surge protector

2026-6-18 12:33:14

The lightning current is large, the residual voltage is low, and the response time is less than 25 nanoseconds.
Built in failure disengagement device, when the surge protector fails due to overheating or breakdown, the failure disengagement device can automatically disconnect it from the power grid without affecting the normal operation of the system.
Visual alarm indicator device, green is normal, red is invalid.
Adopting a plug-in structure, the protection module can be replaced without power outage. And adopt the internationally recognized TH35 standard installation rail.
FS remote signaling device can be selected according to user needs to send fault signals when one or more modules of the surge protector fail, achieving remote monitoring.

Product Specifications

Product model and specifications technical parameters	RMU1-B80	RMU1-C40	RMU1-D20	RMU1-B/ NPE	RMU1-C/NPE RMU1-D/NPE
Maximum continuous operating voltage Uc (V)	four hundred and twenty	four hundred and twenty	four hundred and twenty	two hundred and fifty-five	two hundred and fifty-five
Nominal discharge current In (kA) 8/20 �� s	forty	twenty	ten	sixty	forty
Maximum discharge current Imax (kA) 8/20 �� s	eighty	forty	twenty	eighty	sixty
Voltage protection level Up (kV)	��2.5	��2.0	��1.8	��1.5	��1.2
Response time (ns)	��25	��25	��25	��100	��100
Front level protection: fuse/circuit breaker (A)	63/50	32/25	25/16	63/50	32/25
Insulation resistance (M ��)	��100

RMU1 series surge protector

[surge protector]TIU1 series surge protector

2026-6-18 12:33:06

1. Provide products with different protection levels of B, C, and D
2. Maximum current capacity 65KA (8/20 waveform), high-energy surge protection
3. Maximum sustainable operating voltage for different products: 275V~550V
4. The core components are EPCOS varistors and discharge tubes, which have excellent performance and reliable quality
5. Built in failure thermal desorption device, safer to use
6. Equipped with 3+1 wiring form and ordinary wiring form, suitable for different power grid standards
7. Standard 35mm rail installation
8. Plug in module design for easy maintenance and replacement
9. Equipped with failure indication and normally open/normally closed remote signaling interfaces
10. Equipped with anti reverse insertion mechanism

TIU1 series surge protector

[surge protector]HSU8 series surge protector

2026-6-18 12:32:57

Product Details
The HSU8 series surge protector is suitable for low-voltage distribution systems with AC 50Hz (or 60Hz) and rated operating voltage of 230V/400V. It suppresses transient overvoltage amplitudes lower than the equipment's withstand impulse overvoltage, discharges surge energy, protects system circuits and equipment from lightning surges, and also protects system circuits and equipment from most operational surges (overvoltages). Applicable to banking, securities, meteorology, military, communication, transportation, electricity and other departments.

Product Features

Combination of wiring base and pluggable protection module for easy use and replacement
Equipped with degradation indicator device, intuitive and clear (green represents normal, red represents failure)
high reliability
Can be equipped with remote alarm signal contacts
TH35 standard installation rail installation
The nominal discharge current In is 5kA, 15kA, 25kA, 40kA, 50kA, 60kA
The maximum discharge current Imax is 15kA, 40kA, 60kA, 100kA, 120kA, 150kA
The maximum continuous operating voltage Uc is 275V, 385V, 460V
Monopolar (1P), Bipolar (2P), Tripolar (3P), Quadrupole (4P)

[surge protector]HSM8-63GQ series self resetting overvoltage protector

2026-6-18 12:32:49

Product Details

The HSM8-63GQ series self resetting overvoltage protector is suitable for single-phase lighting circuits, providing overvoltage and undervoltage protection. When single-phase overvoltage occurs in the circuit due to neutral wire breakage, phase to neutral wire misconnection, and severe three-phase load imbalance, the power supply is automatically disconnected to prevent damage to electrical equipment; When the power supply voltage returns to normal, the protector will automatically turn on the power after a delay and restore power supply.

[surge protector]MY2 Surge protector

2026-6-18 12:32:40

Product Overview:
MY2 surge protector (hereinafter referred to as "protector") is suitable for TN-S, TN-C, TN-C-S, TT, IT and other power supply systems with AC 50/60Hz, 380V and below, to protect the power grid from lightning strikes or surge overvoltage.

MY2 surge protector
Failure disengagement device
The module of the protector is equipped with a failure disengagement device. When the protector fails due to overheating or breakdown, the failure disengagement device can automatically disconnect it from the power grid and provide an indication signal. When the protector is normal, the label displays green, and when it fails and disengages, the label displays red.
alarm

The alarm is powered by AC220V, and the indicator light is green when the protector is working normally. The normally open contact is closed, and the normally closed contact is open. Sound and light alarm function: When the protector module fails, the alarm will emit a buzzing sound and turn the green light during normal operation into a red light. If the maintenance personnel press the stop button, the buzzing sound will temporarily stop (but the red light will continue to display). If the fault is still not eliminated after 24 hours, the alarm will beep again.

technical parameters

Indicator/Model		MY2-10/��-140	MY2-10/��-275	MY2-10/��-320	MY2-10/��-385	MY2-10/��-420
Maximum continuous operating voltage UC		140V	275V	320V	385V	420V
Current protection level UP		0.8KV	1.2KV	1.5KV	1.8KV	2.0KV
Nominal discharge current IN (8/20S) Ka		five	five	five	five	five
Maximum discharge current IMAX (8/20S) kA		ten	ten	ten	ten	ten
Response time NS		<25
Test level		Level III
Width MM		eighteen
color		yellow
protection level		IP20
housing material		Enhanced flame retardant PBT
ambient temperature		-4��~+85��
Fuse or circuit breaker (A)		10~16A
Contact specifications	Phase line neutral line	2.5~35mm^two
	ground wire	4.0~35mm^two
	signal line	1.5mm^two

Installation location and application
Installed at the junction of LPZ1 or LPZ2 and LPZ3 zones, with a protection level of III.
The protector is installed on a standard 35mm track;
The protector is connected with copper wires of 2.5-35mm2, and there are two wiring methods:
(1) Connect the power switch to the protector, and then connect the protector to the load end. This method is suitable for distribution boxes with load currents below 100A. The cross-sectional area of the wire should be selected according to the load current (see Figure 1)
(2) From the power switch connection to the protector, and also from the power switch connection to the load end. This method is suitable for distribution boxes with a load current of 100A or more. The cross-sectional area of the wire connected to the protector is not affected by the load current, but the length must not exceed 500mm (see Figure 2).
The grounding wire should use a dual color conductor with a size of 4mm2 or more, and the length should not exceed 500mm.
In order to prevent the failure of surge protectors from affecting the normal operation of the power grid, the protector connected to the L line
A 10-32A fuse should be connected in series.

Adjustment, use, and maintenance
SPD does not need to be adjusted after installation as required;
As long as SPD is installed properly, it can automatically protect the power grid;
Regularly check if the module label turns red during operation and replace faulty components in a timely manner.
The appearance and installation dimensions of the protector
The appearance and installation dimensions of the protector are the same as MY2-10

[surge protector]GSU1 series surge protector

2026-6-18 12:32:32

GSU1 series surge protector

[surge protector]YZG2 series overvoltage suppressor

2026-6-18 12:32:23

YZG2 series overvoltage suppressor

[surge protector]DBM1 series surge overvoltage protector

2026-6-18 12:32:15

The DBM1 series surge overvoltage protector is mainly suitable for limiting transient overvoltages (such as lightning induction and operational overvoltages) in power lines with AC 50Hz and rated operating voltages of 220V and 380V. Used in situations with high overvoltage categories, it can reduce the overvoltage category that the protected electrical equipment and components can withstand by one level; When used in terminals, it can further reduce overvoltage to protect equipment such as televisions, high fidelity speakers, air conditioners, and computers. At the same time, it can also be combined with other modular electrical appliances to form a modular combination electrical appliance that prevents lightning induction.

[surge protector]DSB-C series surge protector

2026-6-18 12:32:06

Product Description
The DSB-C series surge protector is suitable for TT, IT, TN-S, TN-C-S and other power supply systems with AC 50Hz/60Hz, 380V and below. It can be used as an equipotential connection during lightning strikes. Its design is in accordance with IEC-61643-1 and GB18802.1 (2002 edition) standards. The shell is designed to be installed on a 35mm electrical guide rail. The product has a built-in failure release device. When the power protection fails due to overcurrent overheating and breakdown, the failure release device can automatically disconnect it from the power grid. At the same time, the visual alarm indicator module can be replaced when there is working voltage.

Product Features
Replace the protector unit without power outage
Can withstand up to 150KA (8/20 �� S) lightning current surge
Remote signaling contacts and alarms
Action response time less than 25 nanoseconds
The window color indicates the working status of the protector: green (normal), red (fault)

Installation location and application
C-level surge protection level (SPD) protection, used for equipotential overvoltage during lightning strikes, installed at the junction of LPZOB or LPZ1 zone and LPZ2 zone. Usually installed are floor distribution boxes, computer centers, telecommunications rooms, elevator control rooms, cable TV rooms, building control rooms, security monitoring centers, fire centers, industrial control rooms, frequency conversion equipment control rooms, hospital operating rooms, monitoring rooms, and distribution boxes in places where electronic medical equipment is installed. It can also be installed in the main lighting distribution box of residential buildings below six floors, and SPD should be installed in the household distribution box for dispersed small villas.

technical parameters

Product wiring diagram

DSB-C series surge protector

[surge protector]DSB-C/N-PE series surge protector

2026-6-18 12:31:57

Product Description
(BDS-C/2+1-320) (BDS-C/3+1-320) is a surge protector made of N-PE gas discharge gap, used for lightning protection of TT distribution systems in 220/380. It can be used as an equipotential connection during lightning strikes. Its design is in accordance with IEC-61643-1 and GB18802.1 (2002 edition) standards. The protector can be made with a remote signaling contact function. The remote signaling contact is a normally open contact. If one or more modules of the protector fail, the contact will close and send a fault signal. The remote signaling contact is set at AC36V, 1A.

Product Features
New protection mode, phase to neutral (L-N) and neutral to ground (N-PE) protection modes
Complete specifications, with various practical specifications of 220V (2+1) and 380V (3+1)
Remote signaling contact function (optional)
Large flow capacity, built-in high-tech material discharge level

Installation location and application
N-PE in TT distribution system is suitable for C-level N-PE lightning current or voltage protection, and is used for equipotential connection during lightning strikes.

technical parameters

Product wiring diagram

DSB-C/N-PE series surge protector

[surge protector]DSB-B series surge protector

2026-6-18 12:31:49

Product Description
The DSB-B series surge protector is suitable for TT, IT, TN-S, TN-C-S and other power supply systems with AC 50Hz/60Hz, 380V and below. It can be used as an equipotential connection during lightning strikes. Its design is in accordance with IEC-61643-1 and GB18802.1 (2002 edition) standards. The shell is designed to be installed on a 35mm electrical guide rail. The product has a built-in failure release device. When the power protection fails due to overcurrent overheating and breakdown, the failure release device can automatically disconnect it from the power grid. At the same time, the visual alarm indicator module can be replaced when there is working voltage.

Product Features
Replace the protector unit without power outage
Can withstand up to 150KA (8/20 �� S) lightning current surge
Remote remote signaling contacts and alarms �� Action response time less than 25 nanoseconds
The window color indicates the working status of the protector: green (normal), red (fault)
Installation location and application
(B/4) level surge protection (SPD) protection, used for equipotential overvoltage during lightning strikes, installed at the junction of LPZOA or LPZOB zone and LPZ1 zone. Usually installed at the low voltage main distribution cabinet where the conduit enters the line.

(B/2) It is usually installed at the low voltage main distribution cabinet of the overhead incoming line, and is composed of single pole combinations to select and configure various power supply systems.

�� Technical parameters

�� Product wiring diagram

DSB-B series surge protector

[surge protector]DSB-D series surge protector

2026-6-18 12:31:41

The DSB-D series surge protectors (B-class, C-class, D-class power lightning protection boxes) are lightning protection equipment used in low-voltage power grids. Mainly installed at various low-voltage distribution boxes indoors. When the indoor power grid experiences lightning induced overvoltage (conducted wave) or operational overvoltage, the lightning protection box can quickly release energy into the ground, limiting the overvoltage impact on the power grid to a certain peak value to protect electrical equipment from lightning strikes and operational overvoltage impacts. The most basic function of a lightning protection box is to absorb lightning strikes and surge overvoltages. Therefore, the surge protector in the lightning protection box should be selected according to the requirements of different installation locations and limited voltage levels. The surge protector in the lightning protection box has a failure indicator device, with green indicating normal and red indicating failure.

Product Features
Divided by shell structure: wall mounted, embedded:
Divided by power grid type: single-phase, three-phase four wire;
Classified by applicable locations: Type B, Type C, Type D;
B-Household power distribution box, negative terminal of main automatic switch (or fuse).
C - For distribution boxes connected more than 15 meters to the incoming power distribution box, the negative terminal of the main automatic switch (or fuse).
D-Terminal box main automatic switch (or fuse) negative terminal.

Model Description

Technical parameters

Product wiring diagram
1. The lightning protection box should have a good and independent grounding system, and the grounding resistance should be less than 10 ��. And it cannot be replaced by water pipes, gas pipes, sewage pipes, etc.
2. The grounding wire shall not be less than 4mm2, and the distance from the grounding wire to the equipotential body shall be less than 0.5 meters.
When the rated current of the main circuit breaker (fuse) of the front-end distribution box of the lightning protection box is greater than 100A, a lightning protection box with a fuse should be selected.

DSB-D series surge protector

[surge protector]ELXU series surge protectors for power protection

2026-6-18 12:31:32

The ELXU series surge protectors for power protection are suitable for TN-S, TN-C, TN-C-S, TT, TI and other power supply systems with AC 50/60HZ 380V and below. They can be used as equipotential connection and protection electrical equipment during lightning strikes, and are installed at the junction of LPZOB or LPZ I and LPZ II zones.

The ELXU series surge protector for power protection is a voltage limiting type surge protector suitable for indoor use, complying with IEC61643-1 and GB18802.1 standards, with a test classification of Level II and an enclosure protection level of IP20.

[surge protector]TBP-230 series low-voltage combined comprehensive instantaneous overvoltage protector

2026-6-18 12:31:24

The TBP-230 series low-voltage combined instantaneous overvoltage protector is applied to 220/380V power supply and consumption systems, mainly used for busbar side protection and load side protection of important buildings, dangerous area buildings, and important equipment. Adopting special internal structures and wiring methods to achieve functions that ordinary surge protectors cannot achieve.

TBP-230 series low-voltage combined instantaneous overvoltage protector model definition:

Example of Low Voltage TBP Model (TBP-230/5P)

[surge protector]LND series surge protectors for power distribution systems

2026-6-18 12:31:15

LND series surge protector for power distribution system

I. Overview

With the rapid development of information networks, the number and scale of electronic devices within the system are constantly expanding, the integration level of electronic devices is increasing, and the overvoltage resistance of electronic devices is correspondingly decreasing. Once electronic devices are attacked by surge overvoltage (caused by lightning or switch operation), the probability of damage also greatly increases. Modular surge protectors for low-voltage systems are the preferred product for preventing such destructive accidents.

2�� Purpose and execution standards

The LND series surge protector is suitable for AC 220/380V low-voltage TT, IT, TN-S, TN-C-S and other distribution systems. It is used to limit the impact of surge overvoltage on the power supply system and prevent electromagnetic pulses generated by lightning strikes from impacting electrical equipment through the distribution system.

The performance requirements of this product shall be implemented in accordance with the GB18802-2002 "Surge Protective Devices (SPDs) for Low Voltage Distribution Systems" standard. For some parameters not explicitly specified in this standard, reference shall be made to the foreign IEC61643-1, UL1449, and IEEE62.41 standards for correction. In addition, GB50057 "Code for Design of Lightning Protection of Buildings" does not provide detailed regulations on the production parameters of SPDs, and cannot be used as a standard document to guide the specific production of SPDs. It is only used as a reference specification.

3�� Usage conditions

·Altitude: below 2000m;

·Environmental temperature: -40 ��~+80 ��;

·Environmental humidity: not higher than 90%;

·Seismic intensity: 7 degrees or below;

·Environmental medium: Non corrosive and explosive gases and dust.

4�� Model Definition

5�� Typical Technical Parameters Table of Conventional Products

LND-B series surge protector

Rated voltage V	220/380
Continuous operating voltage (single pole) V	385~420
polar number	2~4
8/20 nominal discharge current kA	forty	sixty	eighty	one hundred
8/20 maximum discharge current kA	eighty	one hundred	one hundred and twenty	one hundred and fifty
10/350 impulse discharge current kA	eight	ten	twelve	fifteen
Electricity (As)	two	two point five	three point seven five	five
Voltage protection level (kV)	two	two	two point five	three
Response time (ns)	<25
Recommended wire diameter (mm2)	L��N16�� PE25
Recommended fuse current (A)	63~100
Single piece width (mm)	eighteen	twenty-seven	twenty-seven	twenty-seven
Installation method	35mm electrical guide rail
Model Example	LND-B/4-420-60

LND-C series surge protector

Rated voltage V	one hundred and ten	220/380
Continuous operating voltage (single pole) V	140~270	320~420
polar number	1~2	2~4
8/20 nominal discharge current kA	twenty	fifteen	twenty	thirty
8/20 maximum discharge current kA	forty	thirty	forty	sixty
Voltage protection level (kV)	zero point eight	1.5~2.0	1.5~2.0	1.5~2.0
Response time (ns)	<25
Recommended wire diameter (mm2)	L��N16�� PE25
Recommended fuse current (A)	thirty-two
Single piece width (mm)	eighteen	eighteen	eighteen	eighteen
Installation method	35mm electrical guide rail
Model Example	LND-C/4-420-20

LND-D series surge protector

Rated voltage V	220/380
Continuous operating voltage (single pole) V	three hundred and twenty
polar number	1~2
8/20 nominal discharge current kA	five	ten
8/20 maximum discharge current kA	ten	twenty
Voltage protection level (kV)	one	one
Response time (ns)	<25
Recommended wire diameter (mm2)	L��N6�� PE10
Single piece width (mm)	eighteen	eighteen
Installation method	35mm electrical guide rail
Model Example	LND-D/2-320-5

[surge protector]TBP Low voltage combined comprehensive instantaneous overvoltage protector

2026-6-18 12:31:07

The TBP low-voltage combined instantaneous overvoltage protector (low-voltage TBP) is applied in 220/380V power supply and consumption systems, mainly used for busbar side protection and load side protection of important buildings, dangerous area buildings, and important equipment

The TBP low-voltage combined instantaneous overvoltage protector (low-voltage TBP) adopts a special internal structure and wiring method to achieve functions that ordinary surge protectors cannot achieve

TBP low-voltage combined comprehensive instantaneous overvoltage protector

[surge protector]GRD series surge protector

2026-6-18 12:30:58

GRD1�� The 2-series surge protectors (hereinafter referred to as protectors) are mainly used to protect electrical appliances from indirect lightning and direct lightning effects or other transient overvoltage surges. These appliances are assembled and connected to electrical circuits with AC rated voltage not exceeding 1000V (effective value), 50/60Hz or DC voltage not exceeding 1500V, limiting the amplitude of transient overvoltage, absorbing, consuming or discharging current energy. When used in situations with high overvoltage categories, they can make the protected components switch from one higher overvoltage category to another lower overvoltage category.

Suitable for combining with other modular terminal appliances to form composite appliances, which can improve installation categories, expand usage scope, or further reduce overvoltage when used for terminals, in order to protect household appliances such as televisions and high fidelity speakers, or devices such as computers and microcomputers.

[surge protector]TBP-400 Series Low Voltage Overvoltage Protector TBP-400/200 400/150 400/100 400/80 400/65

2026-6-18 12:30:50

The TBP-400 series low-voltage overvoltage protector is suitable for use in AC 50/60Hz low-voltage power supply systems to protect against direct lightning effects, indirect lightning magnetic pulses, and other transient overvoltages.
The TBP series protectors comply with GB18802.1-2002/IEC61643-1:1998 and GB50057-2000 "Code for Design of Lightning Protection of Buildings"
TBP series protectors have protection forms such as relative phase, ground to ground, relative neutral line, neutral line to ground, and other combinations.
The TBP series protectors are suitable for surge protection requirements in buildings, communication systems, and industrial fields.

Model specifications and main technical parameters

1. Model and its meaning
Current supplied products: TBP-400 series, TBP-400/15,TBP-400/20,TBP-400/25,TBP-400/40,TBP-400/65,TBP��400/80,TBP-400/100,TBP-400/150,TBP-400/200 Low voltage combined instantaneous overvoltage protector of equivalent model
2. Main Technical Parameters Table
1) Main technical parameters of TBP
2) NPE protection modules with Uc=420V can be specially supplied.
Application Table of TBP Series Protectors 2 Application of TBP in Power Systems

Model specifications and main technical parameters

1. Model and its meaning
Current supplied products: TBP-400 series, TBP-400/15,TBP-400/20,TBP-400/25,TBP-400/40,TBP-400/65,TBP��400/80,TBP-400/100,TBP-400/150,TBP-400/200 Low voltage combined instantaneous overvoltage protector of equivalent model

model	TBP-400/200		TBP-400/150		TBP-400/100		TBP-400/65
Rated voltage (V)	230/400	400/690	230/400	400/690	230/400	400/690	230/400	400/690
Frequency (Hz)	fifty		fifty		fifty		fifty
10/350 �� S lightning impulse current (KA)	fifty	fifty	thirty-five	thirty-five	twenty-five	twenty-five	fifteen	fifteen
8/20 �� S maximum discharge current (KA)	two hundred	two hundred	one hundred and fifty	one hundred and fifty	one hundred	one hundred	sixty-five	sixty-five
Residual voltage of lightning impulse current (not greater than) (kV) 10KA (10/350 �� S)	one point three	two point three	one point three five	two point three five	one point four	two point four	one point four five	two point five
Surge discharge current residual voltage (not greater than) (kV) 5KA/10KV (8/20 �� S) combined wave	one	one point eight	one point one	one point nine	one point one five	two	one point two	two
Operating impulse current residual voltage (not greater than) (kV) screen 300A	zero point seven	one point two	zero point seven five	one point three	zero point eight	one point four	zero point eight five	one point five
1.2/50 �� S impulse action voltage (kV)	one point five	two point six	one point six	two point eight	one point seven	three	one point eight	three point one
2ms square wave impulse current (A)	two thousand		one thousand and five hundred		one thousand		six hundred and fifty
Internal backup insurance breaking capability (Arms)	fifty		fifty		fifty		fifty
External backup insurance breaking capability (Arms)	one hundred and twenty		one hundred and twenty		one hundred and twenty		one hundred and twenty
Discharge frequency (3KA/6KV)	10 ^ 5/20 years		10 ^ 5/20 years		10 ^ 5/20 years		10 ^ 5/20 years
response time	��1ns		��1ns		��1ns		��1ns
Starting time	��25ns		��25ns		��25ns		��25ns
Storage temperature (��)	-40~+80		-40~+80		-40~+80		-40~+80
Working temperature (��)	-25~+65		-25~+65		-25~+65		-25~+65
relative humidity	��95%		��95%		��95%		��95%
Altitude (m)	��4000		��4000		��4000		��4000
Test Basis	GB18802.1 IEC61643-1		GB18802.1 IEC61643-1		GB18802.1 IEC61643-1		GB18802.1 IEC61643-1
Selection criteria	GB50057 UL1449 IEEE62.41-1991		GB50057 UL1449 IEEE62.41-1991		GB50057 UL1449 IEEE62.41-1991		GB50057 UL1449 IEEE62.41-1991
Installation width	180mm		180mm		180mm		90mm

TBP-400 series low-voltage overvoltage protector

[surge protector]JKVAD series DC power surge protector

2026-6-18 12:30:41

Application: JKVAD series DC power surge protector is mainly used for lightning protection of low-voltage DC power systems_A~Zone 2.

Installation method: 35mm electrical guide rail.

Model number					VAD-5	VAD-12	VAD-15	VAD-24	VAD-36	VAD-48
	parameter name			test conditions
work make, do, create, compose, write, etc. ginseng number	Rated working voltage		Un		5V-	12V-	15V-	24V-	36V-	48V-
	Rated working current		In		10A
	leakage current		IL	U=0.75Un	��100uA	��1uA
	Working temperature zone		Tr		-25�桫+80��
guarantee protect ginseng number	Impact flow capacity		Isn	8/20 pulse	20kA
	Limit voltage	Line/Line	Ur	8/20��20kA	��9Un	��5Un	��4Un	��3Un	��3Un	��2Un
		Line/Ground			��200V
	Impact protection Voltage	Line/Line	Up	1kV/us	��5Un	��3Un	��3Un	��3Un	��2Un	��2Un
		Line/Ground			��450V
	Nominal start-up voltage		Uc	IL=1mA	��1.2Un
	response time		Ta		��1Ps

JKVAD series DC power surge protector

[surge protector]JKZAUH type channel surge protector

2026-6-18 12:30:32

Application: JKZAUH channel surge protector is mainly used for lightning overvoltage protection in two-wire communication systems, and is suitable for lightning protection areas 0A to 2.

Protection feature: JKZAUH channel surge protector is used in dual line balanced interface, which can strictly limit surge protection between line and ground.

Installation method: 35mm electrical guide rail

Model number					ZAUH-5	ZAUH-12	ZAUH-24	ZAUH-48
	parameter name			test conditions
work make, do, create, compose, write, etc. ginseng number	Rated working voltage		Un		5V	12V	24V	48V
	Rated working current		In		1A
	leakage current		IL	U=0.75Un	��100uA	��1uA
	Passband		FG	Ae��3dB RL��100��	0��150MHz
	insertion loss		Ae	f��fG/3 RL��100��	��0.5dB
	Working temperature zone		Tr		-25�桫+80��
guarantee protect ginseng number	Impact flow capacity		Isn	8/20 pulse	20kA
	Limit voltage	Line/Line	Ur	8/20��20kA	��14Un	��8Un	��4Un	��4Un
		Line/Ground			��7Un	��4Un	��3Un	��2Un
	Impact protection Voltage	Line/Line	Up	1KV/��s	��6Un	��4Un	��4Un	��4Un
		Line/Ground			��3Un	��2Un	��2Un	��2Un
	Nominal start-up voltage		Uc	IL=1mA	��1.2Un
	response time		Ta		��1ns

JKZAUH type channel surge protector

[surge protector]JKZACH type channel surge protector

2026-6-18 12:30:24

Application: JKZACH channel surge protector is mainly used for lightning overvoltage protection in two-wire communication systems, suitable for lightning protection areas 0A to 2.

Protection feature: Used in dual line balanced interfaces, it can strictly limit surge protection between lines and ground.

Installation method: 35mm electrical guide rail.

Model number					ZACH-5	ZACH-12	ZACH-24	ZACH-48
	parameter name			test conditions
work make, do, create, compose, write, etc. ginseng number	Rated working voltage		Un		5V	12V	24V	48V
	Rated working current		In		1A
	leakage current		IL	U=0.75Un	��100uA	��1uA
	Passband		FG	Ae��3dB RL��100��	0��150MHz
	insertion loss		Ae	f��fG/3 RL��100��	��0.5dB
	Working temperature zone		Tr		-25�桫+80��
guarantee protect ginseng number	Impact flow capacity		Isn	8/20 pulse	20kA
	Limit voltage	Line/Line	Ur	8/20��20kA	��7Un	��4Un	��3Un	��2Un
		Line/Ground			��7Un	��4Un	��3Un	��2Un
	Impact protection Voltage	Line/Line	Up	1KV/us	��4Un	��3Un	��2Un	��2Un
		Line/Ground			��3Un	��2Un	��2Un	��2Un
	Nominal start-up voltage		Uc	IL=1mA	��1.2Un
	response time		Ta		��1ns

JKZACH type channel surge protector

[surge protector]JKZABH type channel surge protector

2026-6-18 12:30:15

Application: Mainly used for lightning overvoltage protection in two-wire communication systems, suitable for lightning protection zones 0A to 2.

Protection feature: Used in dual line balanced interfaces, it can strictly limit surge protection between lines.

Installation method: 35mm electrical guide rail.

Model number					ZABH-5	ZABH-12	ZABH-24	ZABH-48
	parameter name			test conditions
work make, do, create, compose, write, etc. ginseng number	Rated working voltage		Un		5V	12V	24V	48V
	Rated working current		In		1A
	leakage current		I_L	U=0.75Un	��100uA	��1uA
	Passband		FG	Ae��3dB R_L��100��	0��150MHz
	insertion loss		Ae	f��fG/3 R_L��100��	��0.5dB
	Working temperature zone		Tr		-25�桫+80��
guarantee protect ginseng number	Impact flow capacity		Isn	8/20 pulse	20kA
	Limit voltage	Line/Line	Ur	8/20��20kA	��7Un	��4Un	��3Un	��2Un
		Line/Ground			��200V
	Impact protection Voltage	Line/Line	Up	1KV/us	��4Un	��3Un	��2Un	��2Un
		Line/Ground			��450V
	Nominal start-up voltage		Uc	I_L=1mA	��1.2Un
	response time		Ta		��1ns

JKZABH type channel surge protector

[surge protector]JKP-B class surge protector

2026-6-18 12:30:05

Application:

JKP-B60 and JKP-B80 surge protectors are suitable for lightning strike or surge overvoltage protection in AC 50-60Hz and 220V/380V power supply systems. They are generally installed in the low-voltage main distribution cabinet or low-voltage main switchgear of building incoming lines, and are used for various power supply level 2 (B) overvoltage protection.

Installation method: 35mm electrical guide rail.

Model number	JKP-B60	JKP-B80
Rated working voltage Un (V~)	220/380	220/380
Continuous operating voltage Uc (V~)	385, 420	385, 420
Protection level Up (V~)	��2.0	��2.0
Nominal discharge current (8/20us) In (kA)	thirty	forty
Maximum flow rate Imax (8/20 �� s) (kA)	sixty	eighty
Response time t (ns)	��25
working environment	-40��+85
relative humidity	95%(25��)
Connecting wire cross-sectional area (mm × mm)	��25	��35
Connecting ground wire cross-sectional area (mm × mm)	��35	��35

JKP-B level surge protector

[surge protector]JKP-C class surge protector

2026-6-18 12:29:55

JKP-C15/2��JKP-C15/4��JKP-C20/2��JKP-C20/4�� Surge protectors are suitable for AC 50Hz and 220V/380V, providing lightning or surge overvoltage protection for power supply systems. They can meet the needs of computer technology networks, airport communications, factories, intelligent buildings, hospitals, fire centers, industrial control rooms, cable TV rooms, building monitoring, etc. The distribution box for each floor, elevator lobby, and small residential building can also be installed in the main distribution box.

Model number	JKP-C15					JKP-C20
Rated working voltage Un (V~)	220V		380V			220V		380V
Continuous operating voltage Uc (V~)	two hundred and seventy-five	three hundred and twenty	three hundred and eighty-five	four hundred and twenty	four hundred and forty	two hundred and seventy-five	three hundred and twenty	three hundred and eighty-five	four hundred and twenty	four hundred and forty
Protection level Up (V~)	��1.0	��1.3	��1.4	��1.4	��1.4	��1.0	��1.3	��1.4	��1.4	��1.4
Nominal discharge current (8/20us) In (kA)	fifteen					twenty
Maximum flow rate Imax (8/20 �� s) (kA)	thirty					forty
Response time t (ns)	��25
working environment	-40��+85
relative humidity	95%(25��)
Connecting wire cross-sectional area (mm × mm)	��16��25
Connecting ground wire cross-sectional area (mm × mm)	��16��25
Alarm line cross-sectional area (mm × mm)	��1.5

JKP-C level surge protector

[surge protector]JKP-D class power surge protector

2026-6-18 12:29:45

JKP-D5/2, JKP-D5/4, JKP-D10/2, JKP-D10/4, 220V/380V single-phase and three-phase surge protectors are suitable for AC 50Hz, 220V/380V power supply systems requiring surge or overvoltage protection, and can meet the end protection requirements of electrical equipment, such as airport, factory computer networks, intelligent equipment, civil buildings, etc.

Installation method: 35mm electrical guide rail

Model number	JKP-D5		JKP-D10
Rated working voltage Un (V~)	two hundred and twenty		three hundred and eighty
Continuous operating voltage Uc (V~)	two hundred and seventy-five	three hundred and twenty	three hundred and twenty	four hundred
Protection level Up (kV~)	��0.7	��1.0	��1.1	��1.2
Nominal discharge current (8/20us) In (kA)	five		ten
Maximum current carrying capacity I max (8/20 �� s) (kA)	ten		twenty
Response time t (ns)	��25
working environment	-40��+85
relative humidity	95%(25��)
Connecting wire cross-sectional area (mm × mm)	��10		��16
Grounding wire cross-sectional area (mm × mm)	��16		��25
Alarm line cross-sectional area (mm × mm)	��1.5

JKP-D level power surge protector

[surge protector]M-SP series surge protection device

2026-6-18 12:29:36

Description of M-SP series surge protection device

This series of products is suitable for lightning and surge protection in the PZOB lightning protection zone and the LPZ1 to LPZ2 (Class C or II) power lines.
The core component of this product adopts the latest high-capacity surge absorber MOV, which has been rigorously screened and has stable quality.
The product has the advantages of high current capacity, low output residual voltage, and fast response to overvoltage (action time less than 25ns), which can effectively protect electrical equipment.
Install a failure release device that can automatically disconnect the protector from the power grid when it fails due to overheating or breakdown.
This series of products has complete functions, modular packaging, and standard 35mm wide electrical installation rails for easy installation and replacement.
The shell is made of reinforced flame-retardant PBT material, which meets electrical safety standards.
Can attach alarm remote signaling

Product installation location and application
The C-level module series is usually installed at the junction of LPZOB or LPZ1 area or LPZ2 area, that is, Class II, and is usually installed in distribution cabinets and boxes.
Combining single poles into various configurations, suitable for TN-S, TN-C, TN-C-S, TT, IT and other power supply systems.
Widely used for second level lightning protection in power supplies. Usually installed at the distribution cabinet; Floor distribution boxes, computer centers, telecommunications rooms, security monitoring centers, cable TV rooms, building control rooms, elevator control rooms, fire control centers, industrial control hospital operating rooms, monitoring rooms, and distribution boxes containing electronic medical equipment; It can also be installed in the main distribution box of residential buildings below six floors and in the distribution box of dispersed villas.
Before the surge protector, a commercially available 63A fuse must be installed as a backup safety device for the protector.
The protector is suitable for indoor installation, and waterproof measures should be added outdoors.
All wiring must ensure firm and reliable electrical connection, and lightning protection grounding should comply with lightning protection specifications (recommended grounding resistance not exceeding 10 ��), and the grounding wire should be short and straight (�� 0.5 meters). The wire diameter specifications are shown in the wire specification table.

Installation location and application of M-SP series surge protection device

model	M-SP-B
Maximum continuous operating voltage Uc	280V,335V,385V,460V ��50Hz/60Hz
Limit voltage Up (8/20 �� S, In)	��2.2KV	��2.5KV
Nominal discharge current In (8/20 �� S,)	30KA	40KA
Maximum discharge current Imax (8/20 �� S)	60KA	80KA
response time	��25ns
Maximum backup fuse strength	63A backup protection device
Installation of wiring method	parallel connection
bracket installation	35mm wide electrical installation guide rail
Conductor cross-section	Multi strand wire (L \ N) �� 10mm2 Multi strand wire (PE) �� 16mm2
Normal or faulty	possess
Indicate the material of the casing	Enhanced flame retardant PBT
Overall dimensions	90 x 27 x 62mm
Installation width	1 standard module
reference standard	IEC61643��GB18802-2002��GB50343-2004
Installation location	Installed in the distribution box, Class B/II

Technical Specifications

model	M-SP-D M-SP-C
Maximum continuous operating voltage Uc	280V,335V,385V,460V��50Hz/60Hz
Limit voltage Up (8/20 �� S, In)	��1.2KV	��1.5KV	��1.8KV
Nominal discharge current In (8/20 �� S,)	5KA	10KA	20KA
Maximum discharge current Imax (8/20 �� S)	10KA	20KA	40KA
response time	��25ns
Maximum backup fuse strength	63A backup protection device
Installation of wiring method	parallel connection
bracket installation	35mm wide electrical installation guide rail
protection level	Ip20
Conductor cross-section	Multi strand wire (L \ N) �� 10mm2 Multi strand wire (PE) �� 16mm2
Normal or faulty	possess
Indicate the material of the casing	Enhanced flame retardant PBT
Overall dimensions	90 x 18 x 62mm
Installation width	1 standard module
reference standard	IEC61643��GB18802-2002��GB50343-2004
Installation location	Installed in the distribution box, C/D level/II level

Main electrical schematic diagram

[surge protector]ZU30 series surge protector

2026-6-18 12:29:27

The ZU30-B surge protector is suitable for TN-S, TN-C, TN-C-S, TT, IT and other power supply systems with AC 50Hz/60Hz, 380V and below. It is used for equipotential connection at SPD-1 in the SPD installation diagram to protect the power grid from lightning strikes or surge overvoltage. Its design complies with IEC61643-1 and GB18802.1 standards. The product is equipped with a built-in failure disengagement device. When the surge protector fails due to overheating or breakdown, the failure disengagement device can automatically disconnect it from the power grid. At the same time, the visual alarm indicator changes from green to red. The product can optionally have a remote communication contact function. The remote communication contact is a normally open contact. If one or more modules of the surge protector fail, the contact will close and send out a fault signal, achieving remote monitoring. The protection module can be replaced when there is voltage present.