Motor Circuit Breaker for Overload & Short Circuit Protection | UL/CE Certified

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Motor Circuit Breaker: Overload and Short Circuit Protection for Motors

Motor Circuit Breaker: Overload and Short Circuit Protection for Motors

The motor circuit breaker is a protective device for motor circuits, automatically cutting off power during overload, short circuit, or phase loss faults to protect motors and connected equipment. It combines overcurrent protection and manual switching functions, featuring rapid tripping and reliable operation. Commonly installed in motor control cabinets, pumps, and compressors, this breaker ensures safe motor operation, reduces maintenance costs, and prevents equipment damage from electrical faults.
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Advantages

Comprehensive Overload Protection

Combines thermal-magnetic tripping for overloads (1.1-1.5x rated current) and instant short-circuit protection (10x rated current), ensuring motor safety.

Phase Loss Detection

Automatically trips when any phase is lost, preventing motor burnout from single-phasing in three-phase systems.

Compact Motor Mounting

Din rail or surface mounting options, suitable for integrated installation in motor starters and control cabinets.

Related products

The GV2ME08 from Yueqing Huilong is a motor protection circuit breaker designed for medium to large motors, offering advanced overload and short-circuit protection. This breaker features an adjustable current setting range (0.25-0.4A), suitable for motors in fans and small pumps. The thermal-magnetic tripping mechanism ensures rapid response to overloads (thermal element) and short circuits (magnetic coil), with a trip class of 10A for optimal motor protection. The GV2ME08 mounts on 35mm DIN rails (width 17.5mm), saving panel space, and includes a red trip indicator for visual fault diagnosis. Constructed with impact-resistant polycarbonate (UL94 V-0), it withstands temperatures from -25℃ to +60℃ and complies with IEC 60947-2 standards, making it a reliable choice for industrial motor protection in harsh operating environments.

Frequently Asked Questions

How does a motor circuit breaker protect against overloads?

A motor circuit breaker combines thermal-magnetic tripping: thermal elements detect overloads (1.1-1.5x rated current) and magnetic elements trigger instant shutdown for short circuits (10x rated current). This dual protection ensures comprehensive motor safety in electrical systems.
The motor circuit breaker features a quick-reset mechanism, allowing manual reset within 5 seconds after clearing the fault. This reduces downtime compared to fuses or traditional circuit breakers, improving operational efficiency in motor-driven equipment.
Yes, the motor circuit breaker automatically trips when any phase is lost in a three-phase system, preventing motor burnout from single-phasing. This critical feature protects motors in industrial applications like pumps, compressors, and conveyor systems.
The motor circuit breaker offers flexible mounting options, including DIN rail or surface mounting, suitable for integrated installation in motor starters and control cabinets. This versatility simplifies integration into new or existing motor control systems.
Yes, the motor circuit breaker is UL/CE certified, meeting international safety standards for use in global markets. This ensures compliance with local electrical codes and facilitates market access in Europe, North America, and other regions.
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Customer Reviews

David Wilson
Reliable Motor Circuit Breaker for Effective Protection

The motor circuit breaker has been crucial in safeguarding our motor circuits. It promptly trips during overloads or short circuits, preventing damage to motors and other equipment. Its robust construction and easy maintenance make it a reliable choice for industrial applications. We feel much more secure with this breaker in place.

Lisa Moore
Efficient Motor Circuit Breaker with Quick Response

This motor circuit breaker offers fast response times and reliable protection. It accurately detects faults and cuts off the circuit immediately, minimizing downtime and potential damage. The simple design and high-quality materials ensure long-lasting performance. Highly useful for maintaining the safety of our electrical systems.

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UL/CE Certified Safety

UL/CE Certified Safety

Meets international safety standards for use in global markets, ensuring compliance with local electrical codes.