Safety inspection of solid insulation ring main unit
Jul 01, 2022
1. The power transformer must be disconnected before opening the ring main unit, otherwise it will cause property or life safety accidents.
2. Please read the instruction manual for each question before routing.
3. Wiring should be carried out by qualified professional technology.
4. In the ring main unit, the connecting cable from the installation cavity of the instrument panel in the vehicle to the wiring cavity should be reliably airtight according to the airtight three-way joint in the middle of the cavity and the cavity.
5. The shell of the ring main unit should be reliably connected to the grounding system piles in the residential area with a safety factor. The ground resistance should not exceed 4 ohms, and the connecting cable rheostat should not exceed 1 ohms.
6. At least two people should be present for the operation of high voltage ring network switchgear. At least one person is responsible for operation, and others are responsible for on-site inspection. During the operation, the workers need to wear insulating gloves and insulating shoes, and stand on the insulating rubber plate during the operation.
7. When using the ring main unit, pay attention to the closing of the high-voltage load switch in and out of the cabinet, the closing of the grounding system knife, and the closing of the cabinet door.
