he CFW1 series universal circuit breakers (hereinafter referred to as circuit breakers) are suitable for use in power distribution networks with an alternating current of 50Hz, rated operating voltages of AC400V and AC690V, and a rated current of 6300A and below. They are used to distribute electrical energy and protect lines and power supply equipment from hazards such as overload, undervoltage, short - circuit, and single - phase grounding faults. Meanwhile, they can also be used as disconnectors.