Key points of overhaul and maintenance of high voltage vacuum circuit breaker

To a certain extent, vacuum circuit breakers are broadly called "maintenance-free circuit breakers", but in fact inspection and maintenance must be carried out. "Maintenance-free" should only be understood as "vacuum circuit breakers do not need to be periodically dismantled and overhauled". In the actual operation of the vacuum circuit breaker, in addition to regular preventive tests, the overall performance indicators of the circuit breaker must be tested regularly to judge the status of its transmission system and eliminate unfavorable factors that affect the operating life of the vacuum circuit breaker.

1. Detection of the action stroke of the connecting rod of the operating mechanism; prevent the violent impact of the vacuum interrupter from the excessive action distance;

2. Detect the moving contact stroke of the vacuum circuit breaker;

3. Detect the opening and closing speed of the circuit breaker;

4. Synchronous opening and closing of the detection circuit breaker;

5. Measure the opening and closing bounce values of the vacuum circuit breaker;

6. Detection of the vacuum degree of the vacuum arc chamber of the circuit breaker;

7. Power frequency withstand voltage test of circuit breaker.

Although the high-voltage vacuum circuit breaker does not need to be dismantled and overhauled regularly, the hidden dangers of the circuit breaker can be discovered in time by regularly testing the technical characteristics of the vacuum circuit breaker. The unqualified data in the test cannot be ignored. Eliminate unfavorable factors for circuit breaker operation. The arc extinguishing chambers listed as unqualified in the test must be replaced in time to ensure the reliability and safety of the power system and power supply.