Knowledge

Selection requirements for DC system circuit breakers

When using AC and DC dual-purpose air circuit breakers, its performance must meet the requirements of breaking DC circuit short-circuit current and guide selectivity.

DC circuit breaker operating conditions

The ambient air temperature is not higher than +40℃ and not lower than -5℃; and the 24-hour average value does not exceed +35℃ (except for special orders).

Features of DC circuit breaker

The installation of the moving and static contacts in the contact arc extinguishing system is based on the principle of parallel conductors.

The scope of application of DC circuit breakers

​DC molded case circuit breakers are suitable for DC grid circuits with rated voltages of DC250V～DC1000V and rated currents of 10A～1250A.

Maintenance and maintenance of DC circuit breakers

​In order to keep the main circuit breaker in good working condition, maintenance management must be strengthened.

Product function of DC circuit breaker

​The DC circuit breaker has super-class current-limiting performance, which can accurately protect relay protection and automatic devices from overload, short-circuit and other fault hazards.