Structural requirements for vacuum circuit breakers

Structural requirements for vacuum circuit breakers

1. The vacuum switching tubes used in the vacuum circuit breakers of the same type are interchangeable.

2. There is a counter for recording the number of operations on the front panel of the circuit breaker.

3. The circuit breaker is equipped with opening and closing buttons and opening and closing indicators.

4. The circuit breaker should be equipped with a spring energy storage indicator.

5. The metal box of the circuit breaker should have a grounding bolt with a diameter of 12mm that is anti-rust and good in conductivity, and a grounding symbol should be marked near the grounding point.

6. The secondary circuit of the circuit breaker should be connected with wires and terminals, and the secondary circuit should be isolated from the main circuit.

7. The insulation rod of the vacuum circuit breaker must apply a DC voltage of 20kV to test the leakage current.