Power distribution equipment safety maintenance procedures _ electrical safety operation procedures - solutions - Huaqiang Electronic Network

Probe domestic switch needle KG-300K needle head diameter is 3.0mm normally open switch needle

Photocoupler

1. After receiving the power failure notice, the electrician pulls down the relevant knife switch and accepts the fuse. And lock the operation handle, and hang the warning sign at the same time, and put a protective cover around the equipment that has not been powered off.

2. After high and low voltage power failure, the first inspection must be carried out before work:

3. When high-voltage electroscope is used, the corresponding high-voltage class of electroscope should be used. When inspecting electricity, it is necessary to wear high-voltage insulating gloves that have passed the test. First, test on live equipment. It is really easy to use before it can be used for electroscope.

4. The electricity inspection work shall be carried out on both sides of the construction equipment's inlet and outlet lines. The inspection work of the outdoor power distribution equipment shall be carried out in dry weather.

5. After the test is clear and there is no electricity, grounding the construction equipment and short-circuiting the three phases is a basic and reliable safety measure to prevent sudden calls and protect the staff.

6. The grounding wire should be installed in all aspects of the possible transmission of construction equipment. For the double-circuit power supply unit, when repairing a busbar switch or isolation switch and load switch, not only the two busbar cutters are opened at the same time, but also Both ends of the construction knife gate are connected to the grounding wire at the same time.

7. Install the grounding wire first, and then connect the grounding wire. When the grounding wire is removed, the order is reversed.

8. The grounding wire should be hung in the place where the staff can be seen at any time, and the “someone working” warning sign should be hung on the grounding wire. The work guardian should always check whether the grounding wire is kept intact.

9. It should be especially emphasized that the switch of all aspects of the construction equipment must be completely disconnected, and the knife or isolation switch must be opened to make at least one obvious disconnection point in all aspects, and it is forbidden to only disconnect the oil switch. When working on the equipment, attention must be paid to the possibility of reverse power transmission from the low voltage side through the high voltage side of the transformer. Therefore, the transformers related to the construction equipment must be disconnected from both sides of the high voltage.

10. When the work is resumed after the middle stop, all safety measures should be re-examined. After everything is normal, the work can be restarted. When leaving the scene, the room should be locked and the outdoor should be guarded.