Small Circuit Breaker 4P

Small Circuit Breaker 4P: Economical three-phase four-wire miniature circuit breaker

In scenarios such as small commercial premises, workshop power cabinets or three-phase residential incoming lines, branch circuits require reliable, economical and space-saving protection solutions. The Small Circuit Breaker 4P is precisely the product designed for this purpose. It adopts a modular structure, which can synchronously control and protect three-phase lines and neutral lines, provide overload and short-circuit protection, and ensure operational safety with complete electrical isolation. It is a fundamental electrical component for building a safe three-phase power distribution system.

Technical specifications

Application scenarios

Commercial and public facilities: Three-phase incoming line main switches or regional branch switches for small shops and offices.

Industrial control cabinets: Small power cabinets and control boxes provide independent circuit protection for three-phase equipment such as fans, water pumps, and small motors.

Three-phase power supply for residential buildings: The main switch at the entrance of a villa or a residence that requires three-phase power supply.

FAQ

Q：What are the main differences between 4P small circuit breakers and 3P ones? When must 4P be used?

A：The main difference lies in whether the neutral line (N) is cut off simultaneously. The key scenarios where 4P must be used include: the system is a three-phase four-wire system and the neutral wire serves as the current-carrying conductor (such as when carrying a 220V single-phase load); There is a demand for dual power supply switching (N line needs to be switched).