 How to maintain LV Switchgear

How to maintain LV Switchgear

2022-11-04

Maintenance method of low -voltage Switchgear:
1. Implement segmented maintenance, first maintain the security load segment. When maintaining a capacitor cabinet, first disconnect the total switch of the container, use more than 10 mm wires to discharge the capacitor one by one, and then check the contactor, the capacitor wiring screw, whether the grounding device is good, check the capacitor's stomach, and use a vacuum cleaner to use a vacuum cleaner Clean the dust inside the cabinet.

2. Stop security load electricity. If the load is used as usual, the air switches for the city's electricity are disconnected. Anti -send motor sending electricity.

3. Check that there is deformed at the bus connector, whether there is a trace of discharge to change the black traces, and fix the connection bolt. If the bolt is rusty, it should be replaced to ensure that the connection is close and check whether the insulator on the bus is loose and damaged.

4. Use the handle to shake the total air switch from the power distribution cabinet to check whether the main contacts are burned and melted. Close.

5. Take out the separate cabinets from the drawing cabinet to fix the wiring terminals, check the installation and wiring of current transformers, current meters, and electric meters, check the flexible and reliability of the handle operating mechanism, fix the air switch in and out of the line, clean the wires, clean The dust in the switching cabinet and behind the distribution cabinet leads the dust.

6. Break off the low -voltage side air switch step by step, and then disconnect the high -voltage side of the transformer electrical high -voltage -empty circuit breaker to close the ground switch, hanging the "prohibited gates, someone work" sign.

7. After the security load is maintained, the generator can start power supply and stop the maternal main line segment.

8. After all 3,4,5 items are required to maintain the power distribution cabinet, remove the safety device, disconnect the high -voltage side ground switch, close the vacuum circuit breaker, and observe the transformer into the operation. Electricity, and the power supply electricity power supply power supply is transferred into a market power supply.

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