First, the high-voltage outlet cabinet power failure operating procedures

1) Operate the instrument on the door to close and switch the switch to make the circuit breaker open and power off. At the same time, the red closing indicator on the instrument door is off, the green opening indicator is on, check other related signals, everything is normal, and the power failure is successful. (When operating the combination switch, turn the operation handle counterclockwise to the panel indication position. After releasing the hand, the operation handle should be automatically reset to the pre-position position.)

2) Insert the handle of the circuit breaker handle into the handle of the handle and press it down firmly. Turn the handle counterclockwise for about 20 turns. Remove the handle when the handle is obviously blocked and accompanied by a “click” sound. The car is in the test position, the aviation plug is unlocked, the door of the handcart is opened, and the air is inserted manually. (The handcart main circuit is disconnected)

3) Push the transfer car and lock it, pull out the circuit breaker handcart to the transfer car, and remove the transfer car. (When pulling the circuit breaker, press the two push-pull handles of the circuit breaker to the middle, and pull back with force (to pull out the cabinet). After the circuit breaker is pulled to the transfer trolley and in place, release the push-pull handle and the handle should be automatically reset.)

4) Observe the live display and confirm that it can be operated without power.

5) Insert the grounding switch operating handle into the hexagonal hole on the lower right side of the middle door, rotate clockwise to make the grounding switch in the closing position, confirm that the grounding switch is already closed, open the lower door of the cabinet, and the maintenance personnel can enter the maintenance and overhaul. .

6) The grounding switch and the circuit breaker and the cabinet door are interlocked. Only when the circuit breaker is in the test position or outside the cabinet, the grounding switch can be combined. Only after the grounding switch is opened can the circuit breaker be shaken from the test position. To the working position, it is not allowed to operate. The grounding switch and the cabinet door interlock can be unlocked urgently. It can be unlocked urgently only when necessary, otherwise there is danger of electric shock.

Second, high-voltage outlet cabinet power transmission operation procedures

1) Close all doors and rear sealing plates and lock them. (The grounding switch can be closed when the door is closed)

2) Insert the grounding switch operating handle into the hexagonal hole on the lower right side of the middle door, rotate it counterclockwise, so that the grounding switch is in the opening position, take out the operating handle, and the interlocking plate automatically bounces back at the operating hole to cover the operating hole. The door is locked.

3) Push the transfer trolley and position it, push the circuit breaker handcart into the cabinet and position it in the test position. (When pushing the circuit breaker, press the two push-pull handles of the circuit breaker to the middle, and push forward with force ( Push inside the cabinet. After the circuit breaker reaches the test position, release the push-pull handle and the handle should be automatically reset.) Manually insert the aviation plug, close the handrail door and lock it.

4) Observe whether the instruments and signals of the upper cabinet door are normal. (In normal time, the integrated relay power light is on, the hand test position light, the circuit breaker opening indicator and the energy storage indicator are on. If all the indicators are off, open the upper door to confirm whether the bus power switch is closed. If the indicators are still off, the control loop needs to be repaired.)

5) Insert the handle of the circuit breaker handle into the handle of the crank handle and press it down firmly. Turn the handle clockwise clockwise for about 20 turns. When the handle is obviously blocked and accompanied by a “click” sound, remove the handle. The car is in the working position, the aviation plug is locked, and the main circuit of the circuit breaker is connected to view the relevant signals. (At this time, the working position of the handcart is on, and the test position of the handcart is off.)

6) Operate the switch on the door of the instrument to make the circuit breaker close and send power. At the same time, the red closing indicator on the instrument door is on, the green opening indicator is off, check the live display and other related signals, everything is normal, and the power is successfully delivered. . (When operating the combination switch, turn the operation handle clockwise to the panel indication position. After releasing the hand, the operation handle should be automatically reset to the pre-close position.)

7) If the circuit breaker is automatically opened after the switch is closed or the motor is automatically opened during operation, it is necessary to judge which fault is eliminated and then re-send the power according to the above procedure. (When the line fault circuit breaker is opened, an audible and visual alarm will be issued, that is, the panel red fault indicator will be on, and the fault sound will sound. At this time, the integrated relay will be observed, such as the TRIP light, and the IL1, IL2, IL3 lights will be on. Or at the same time, the fault is the overcurrent of the line. If the TRIP light is on and the IRF light is on, the fault is a comprehensive relay abnormality. If the TRIP light is on, and the IO light is on, it is the ground fault of the line. After the repair is completed, it needs to be comprehensively protected. The panel RESET/STEP button manually resets the integrated relay. If the panel signal relay is off, it is the transformer over-temperature fault, indicating that the transformer is faulty or heavily overloaded. After the fault is removed, the signal relay must be manually reset to re-close.

Third, all side cabinet operating procedures

The method of shaking into the used fuse bus is the same as that of the circuit breaker handcart. Although the fuse of the variable fuse handcart has a certain breaking and arc-extinguishing ability, it cannot be used in the operation of cutting and commissioning. With load operation, that is, before rocking in or out of the fuse car, be sure to open the lower door of the cabinet, disconnect all low-voltage circuit breakers, close the lower door of the cabinet and lock it to operate. The rear cabinet sealing plate and the fuse hand truck used are not interlocked, that is, when the used change is put into operation, the special cabinet can also be used to open the cabinet back sealing plate. At this time, the variable low-voltage end can be directly contacted, and in general, it must be First shake out the fuse car and then open the rear sealing plate. If you have to turn on the rear sealing plate under special circumstances, you need to pay special attention to safety.