Application of circuit breakers

Circuit breakers are core devices in power systems, enabling circuit switching control and automatic fault protection. They are widely used in all scenarios, from household electricity to high-voltage power grids. Their core functions are overload/short circuit/leakage protection, equipment safety, power supply stability, and fire and electric shock prevention.

Residential and Civil Buildings (Low-voltage Miniature Circuit Breakers (MCBs))

Main switch/branch circuit protection in distribution boxes: Independent protection for lighting, sockets, air conditioning, and kitchen/bathroom circuits; fault tripping does not affect the power supply to the entire house.

Residual current protection (RCCB/RCBO): Protection against electric shock in damp areas (bathrooms, kitchens); main incoming line leakage protection enhances personal safety.

Power outages during renovations/maintenance: Manual disconnection for safe inspection of wiring and appliances.

Industrial and Manufacturing Industries (Molded Case Circuit Breakers (MCCBs) / Frame Circuit Breakers (ACCBs))

Main power distribution and branch protection in workshops: Frame circuit breakers (ACBs) are used for the main incoming line of the factory and the low-voltage side of the transformer; molded case circuit breakers (MCCBs) are used for equipment circuits and motor control.

Motor protection: Protects fans, pumps, compressors, machine tools, etc., from overload, stall, and phase loss burnout.

Special environments: Explosion-proof (coal mines, chemical plants), high-temperature/corrosion-resistant (metallurgical, shipbuilding).

Multi-level protection system: Three-level coordination of main switch – branch – equipment, ensuring precise fault isolation and minimizing power outage area.