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1: Maintenance should start from the low-voltage side of the transformer. After the power is cut off in the distribution cabinet, clean the dust inside the cabinet, check whether the connection between the busbar and the down lead is outstanding, whether the joint points have heat or discoloration, check whether the cable head and wiring pile head are firm and firm, check whether the grounding wire is corroded, and whether the wiring pile head is tightened. All secondary circuit connections are securely connected and the insulation meets the requirements.

2: When checking the drawer type switch, the drawer type switch cabinet should be flexible when pushed in or pulled out, and the mechanical locking should be firm. Check if the active air switch operation organization on the drawer cabinet is in place and if the wiring screws are tightened. Remove dirt from the surface and surrounding areas of the touchpad contacts, and check if there are no defects in the touch of the touchpad contacts. If the touch of the contacts is poor, it is necessary to slightly file the surface of the contacts. If the contacts are severely burned (the contact points are worn to one-third of the original thickness), they should be replaced. The appearance of the power indicator and the indicator light are intact.

3: When repairing the capacitor cabinet, the main switch of the capacitor cabinet should be disconnected first. After discharging the capacitors to the ground one by one with a wire of at least 10mm2, the appearance of the shell should be checked and there should be no oil leakage. If the capacitor shell is swollen, it should be dealt with in a timely manner, and the discharge device, control circuit wiring screws, and grounding device should be replaced. Debugging of the indication and active compensation parts after closing.

4: Maintenance of circuit breakers in the receiving cabinet and contact cabinet: First disconnect all loads, and then use the handle to shake out the circuit breaker. Tighten the wiring screws from the beginning and check if the elasticity of the blade meets the regulations. Check if the arc extinguishing grid is broken or damaged, manually adjust the mechanical interlocking opening and closing, check if the contact touch is outstanding, and if necessary, file the surface of the contact to check if the internal springs, gaskets, and screws are loose, deformed, or fallen.

The above is the answer to the two questions about the quotation for low-voltage distribution cabinets and how to inspect and maintain low-voltage distribution cabinets. We hope it can be helpful for us to purchase and maintain distribution cabinet products. Regardless, it is necessary to assign a dedicated person to supervise during the maintenance process to avoid unnecessary accidents.

Article source: Jiangmen substation cabinet http://muaizuowen.com/