What Are The Operating Procedures For Vacuum Circuit Breakers?

   https://www.kaichuanpower.com/breaker/

  Vacuum circuit breaker is an indoor switchgear for the power system with a three-phase AC 50Hz rated voltage of 12KV the civil melting vacuum circuit breaker is used as the protection and control unit of power grid equipment and power equipment of industrial and mining enterprises.It is suitable for places that require frequent operation at the rated operating current, or multi-alternating interrupting short-circuit current.

1. General Provisions

1)Before the circuit breaker is put into operation, the circuit breaker body and the protection device should be comprehensively and carefully inspected, and the transmission test of the protection device should be carried out if necessary to ensure that the separation and closure are good and the signal is correct before it can be put into operation.

2)During the operation, the relevant voltage, current, power and other indications and traffic lights should be monitored at the same time.

3)In the case of live electricity, it is strictly forbidden to use jacks or pressure plates to close slowly,

4)If it is found that the opening and closing is not successful, the control fuse should be removed immediately or the control power switch should be jumped to prevent the opening and closing wires from being burned:

5)After the circuit breaker is activated, the relevant signals and the instructions of the measuring instrument should be checked, and the actual opening and closing position of the circuit breaker should be checked on site.

6) When it is necessary to manually operate the high-voltage circuit breaker urgently, it can only be operated after the approval of the dispatcher.

2. Precautions for operation

1)When the pressure of the circuit breaker is lower than the latching value, the switch control power supply should be disconnected immediately, and the mechanism should be stuck, and the switch should be prohibited from opening and closing with electricity.

2)The circuit breaker in operation should be measured regularly with a slight water content, once every three months after new installation and overhaul, and once a year after the water content is stable.Regularly check the leak of the circuit breaker every year, and the annual air leakage rate should comply with the regulations.

3)The gas in the newly installed and put into operation circuit breaker is strictly prohibited from being discharged into the atmosphere and must be recovered by a gas recovery device.When the pressure is lower than the alarm value, it should be reported to the dispatching and competent department immediately.

4)The gas in the newly installed and put into operation circuit breaker is strictly prohibited from being discharged into the atmosphere and must be recovered by a gas recovery device. When the gas needs to be replenished, the gas that has passed the inspection should be used.

5)The vacuum circuit breaker should be equipped with a device to prevent operating overvoltage, and a zinc oxide arrester is generally used.

6)When there is an abnormal sound in the vacuum interrupter in operation, the control power supply should be disconnected immediately and the operation should be prohibited.

7)The oil circuit breaker in operation should be tested on the insulating oil regularly, and the test results should be recorded in the relevant records; When the oil level is lowered below the lower limit, the insulating oil should be replenished in time.

8)After the oil circuit breaker trips, the oil color turns black, the oil is injected or there is a rejection phenomenon, and the oil leakage is serious, and the maintenance should be carried out in time.