Problems of Circuit Breaker in High Voltage Cabinet

1, the isolating circuit breaker is installed in front of the circuit breaker, in order to have an obvious disconnection point when power is cut off. Can't negative closing, the back of the circuit breaker is responsible for negative closing.

2. On-off and on-off, there are manual and automatic. Automatic refers to the automatic reclosing device, and the number of automatic reclosing can be set. The power supply provided by PT is not only used for the opening and closing of circuit breakers, but also used for secondary relay protection. Then, if the bus is out of power, the circuit breaker is completed by the energy storage capacitor or battery, and the system without energy storage capacitor and battery is completed by the voltage loss trip (mechanical structure). The circuit breaker is also equipped with a manipulator dynamic opening and closing device.

3. For safe operation, the current of the isolating circuit breaker is greater than that of the circuit breaker. Another problem is that the isolating circuit breaker is simple in structure and low in price.

Does the rated current of the circuit breaker mean that it will act when it reaches this current? No, the circuit breaker allows overcurrent. The setting value of circuit breaker action current is related to the equipment with the circuit breaker.