Shanghai Huabang Industrial Business Network - Motor 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