1、 Operation sequence of power off and transmission

1. Operation sequence of high voltage disconnector:

(1) Power off operation sequence:

A. Disconnect the air switches and disconnectors of each low-voltage shunt.

B. Turn off the low voltage main switch.

C. Turn off the high pressure oil switch.

D. Disconnect the high voltage disconnector.

(2) The operation sequence of power transmission is opposite to that of power off.

2、 Low voltage switch operation sequence:

(1) Power off operation sequence:

A. Disconnect the air switch and disconnector of each low-voltage shunt.

B. Turn off the low voltage main switch.

(2) The sequence of power transmission is opposite to that of power failure.

3、 Switching operation rules

1. For switching operation of high-voltage dual power users, they must contact with the power supply bureau in advance, obtain the consent or pull the notice of the power supply bureau, and carry out the switching operation according to the specified time. They are not allowed to switch without permission.

2. Switching operation must first send and close the idle one, and then stop the original one, so as to avoid the impact of users.

3. If the cause of the fault is not found out, the switching operation shall not be carried out.

4. The two switching switches shall be locked immediately after each operation, and the warning self plate shall be hung at the same time.

5. Switching operation must be carried out by two persons (one for operation and one for monitoring).

Editor in charge: LQ

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