What is the rated breaking current of the circuit breaker?

Rated breaking current: it is characterized by the ability of the circuit breaker parameters. At rated voltage, the maximum current of the circuit breaker to ensure reliable breaking called rated breaking current, short-circuit current instant number kA rms periodic component separation unit which represents the circuit breaker contacts. When the circuit breaker operating below its rated voltage grid, which breaking current can be increased. However, limited by the mechanical strength of the arc chamber, there is a maximum breaking current, called the ultimate breaking current.

What is the rated breaking and closing current of the circuit breaker?

Closing current: is a characteristic parameter of the circuit breaker closing current capability. Since the circuit breaker is turned on, the circuit may Yufu short-circuit fault, the circuit breaker case Closing a large short-circuit current. Thus, on the one hand due to the short-circuit current of the electric power weakens the force of the closing operation, on the other hand because breakdown occurs before the arcing contacts Not contact, the contacts may be welded, thereby causing damage to the circuit breaker. Off breaker can be reliably bonded to maximum peak current, it referred to the rated current of closing. Rated making current and dynamic current equal in value, both of which are equal to the rated breaking current of 2.55 times.