Control cabinet maintenance

Control cabinet maintenance

1. Disconnect the power supply, check the cabinet of the control cabinet for reliable grounding, and make the grounding resistance not more than 4Ω. 2. There are different voltages on the control cabinet (DC 110V; AC single-phase 220V; three-phase AC), the circuit must be separated during maintenance to prevent short-circuit accidents. 3. All electrical switches on the control cabinet should be flexible and reliable, with no significant noise. There should be no looseness at the junction of the connecting wire and the terminal. The wire at the junction of the moving contact cable should be free of breakage. 4. Use a soft brush or blower to clear the screen insert and the dust of all the electromagnetic switch parts, and check the state of the electrical switch contacts in the control cabinet, the contact situation, the insulation of the outer surface of the coil and the action of the mechanical parts are reliable. 5. When replacing the fuse, the fuse current should match the current of the loop.