Motor Protector Manufacturers | China Motor Protector Factory & Suppliers

Motor Protection Circuit Breakers

Reliable motor protection against overloads, short circuits and phase failure. CNC motor protection circuit breakers feature adjustable current settings and compact designs for pumps, fans, compressors and industrial machinery.

Product Category

YCP5 Motor Protection Circuit Breaker

YCP5 series AC Motor Starter is suitable for circuits the alternating voltage up to690V,current up to 80A.The product works to control theoverload,phase loss,shortcircuit protection and infrequent starts of a three-phase squirel cage asynchronousmotor.The Motor Starter can protect the distributing line for infrequent loadtransfer,and it can also works as an isolator
YCP6 Motor Starter

YCP6 series Motor protection circuit breaker (also known as: Motor Protector or Motor starter, hereinafter referred to as “circuit breaker”)is suitable for AC voltage to 690V, the highest current to 80A circuit, is a circuit breaker integrating the functions of isolation switch, circuit breaker and thermal relay with isolation protection, overload protection, temperature compensation, phase failure protection, short circuit protection. Application range: three-phase mouse cage asynchronous motor direct start and control, distribution line protection and infrequent load conversion.

Standard: IEC60947-2, 60947-4-1.
Motor protector YCP7

The YCP7 series AC motor starter is suitable for circuits with AC voltageup to 690V and current up to 32A. lt is used for overload, phase failure.short circuit protection, and infrequent starting control of three-phasesquirrel cage asynchronous motors. it can be used for distribution lineprotection and infrequent load switching, and can also be used as anisolator.

Standards: IEC 60947-4-1,IEC 60947-4-2

Motor Protection Circuit Breakers for Reliable Motor Control

CNC motor protection circuit breakers provide integrated protection and manual control for three-phase motors. Also known as MPCBs, motor starter protectors or manual motor starters, they protect motors against overloads, short circuits and phase failure.

The adjustable current setting allows the device to match the motor’s rated current. CNC YCP5, YCP6 and YCP7 series are suitable for pumps, fans, compressors, conveyors and industrial machinery.

What Is a Motor Protection Circuit Breaker?

A motor protection circuit breaker is designed specifically for electric motor circuits. Unlike a standard MCB, an MPCB accommodates motor starting current while providing adjustable overload and instantaneous short-circuit protection.

Applicable models also provide phase-failure protection. For frequent, remote or automatic switching, an MPCB is normally combined with an AC contactor.

Integrated Protection for Motor Circuits

Function	Description
Overload Protection	Protects against sustained overcurrent and overheating.
Short-Circuit Protection	Rapidly interrupts severe fault currents.
Phase-Failure Protection	Reduces overheating risk after phase loss.
Adjustable Current	Matches protection to the motor rated current.
Manual Control	Supports local start, stop and reset.
Circuit Isolation	Allows safe circuit disconnection for maintenance.

CNC Motor Protector Product Range

CNC offers three motor protector series for different current ranges and motor control requirements.

Series	Rating	Main Features
YCP5	Up to 690V, 80A	Overload, short-circuit and phase-failure protection.
YCP6	Up to 690V, 80A	Integrated motor protection and circuit isolation.
YCP7	Up to 690V, 32A	Compact protection for smaller motor circuits.

Select the model according to the motor rated current, operating voltage, starting conditions and prospective fault current.

Typical Applications

Application	Typical Equipment	Protection Focus
Water Systems	Pumps and irrigation equipment	Continuous-load protection
HVAC	Fans, blowers and ventilation units	Frequent-start protection
Compressed Air	Air compressors	Overload and stall protection
Material Handling	Conveyors and lifting systems	Blocked-load protection
Industrial Machinery	Machine tools and packaging equipment	Integrated motor protection
Control Panels	Motor control panels and MCCs	Coordinated circuit protection

How to Select the Right Motor Protector

Do not select an MPCB according to motor power alone. Check the motor nameplate and actual operating conditions.

Factor	What to Check	Purpose
Rated Current	Motor nameplate current	Select the correct adjustment range
Voltage and Poles	Supply voltage and phase system	Ensure circuit compatibility
Breaking Capacity	Prospective fault current	Ensure safe fault interruption
Starting Conditions	Starting current and time	Prevent nuisance tripping
Contactor Coordination	Tested device combinations	Improve starter safety
Environment	Temperature, altitude and enclosure	Apply necessary derating