1. The ring network cabinet is viewed under the following conditions:

1) After 100 times of full load operation, check the resistance and insulation level of the main circuit of the load switch, and send it to the manufacturer for overhaul according to the condition;

2) After 10000 times of no-load operation, the mechanism characteristics and mechanical operation of the load switch should be checked.

2. Record SF6 gas pressure gauge indicator data regularly. And according to SF6 gas condition curve, according to the condition of the timely supplement. Under normal conditions, the period of no replenishment is 15 years.

3. Periodically check whether the ring network cabinet is abnormal. Once found, please take measures in time.

4. Operators should understand all parts of the ring network cabinet, including structural functions and equipment.

2.Use and fault treatment

1). Check before sending power

The electrical function, insulation level, wiring correctness and anti-misoperation reliability of all components of the ring cabinet should be comprehensively checked. After viewing it, it is believed that there is nothing missing, turn on the power, and investigate the operation status of the indicating instrument. If normal, can be put into operation.

2). During normal operation

The load switch should be in the closing position, the ground switch should be in the opening position, and the front door panel should be in the closed condition.

3). Cable faults

The load switch in the cabinet should be opened first. At this moment, you can open the front door panel into the maintenance. The upper main busbar is in live condition, if the fuse needs to be replaced, it is still carried out in the above operation sequence.