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Low-voltage distribution cabinet is a general term for the motor control center in electrical equipment. The distribution cabinet is suitable for occasions where the load is relatively scattered and the line scale is small. The load of the motor control center is concentrated, and there are many circuit conditions. They distribute the load from one of the circuits in the upper distribution equipment to the nearest load. The equipment should provide protection, monitoring and control of the load. Let's follow Qifeng to find outLow-voltage distribution cabinetCommon fault causes and solutions.
Low-voltage distribution cabinetCommon fault causes and solutions. Fault 1: A short circuit occurs in the low-voltage distribution cabinet. Reason:
The insulating base supporting the busbar or the insulating part inserted into the contact is contaminated, damp or mechanically damaged, resulting in a short circuit.
Improper selection of electrical components, such as insufficient breaking capacity of circuit breakers, etc.
Load operation disconnector.
Forgot maintenance tools in the car. After the power outage maintenance, the wrench, screwdriver and other maintenance tools were accidentally placed on the car, and the power transmission was not carefully checked, and a short circuit occurred after the power transmission.
Small animals can cause short circuits. Due to the small animals burrowing into the distribution cabinet, causing a short circuit.
Method:
The dirt on the insulating base of the wire row should be cleaned up, the equipment damaged by moisture should be wiped dry in time, and the equipment damaged by the machine should be replaced in time.
A circuit breaker with an appropriate capacity should be selected.
The operating procedures should be carried out carefully.
In accordance with the specified requirements, the tools are inspected after repair.
Install protective nets to prevent small animals from entering.
Fault 2: The bus connection line is overheated. Reason:
1.Poor contact.
2.The butt bolt is too tight or too loose.
Method:
If the bus contact is poor, measures such as shifting the load, power outage maintenance or replacing the bus can be taken.
When tightening the butt bolts, the tightness should be appropriate.