The testing and debugging of the electric cabinet after its production is an important part of ensuring its normal operation and reliable performance. The following are some common methods and steps:

1. Appearance inspection

First of all, check the appearance of the electrical cabinet:

1. Check whether the cabinet structure is firm and whether there is deformation, damage or peeling of paint.

2. Whether the door switch is flexible and the door lock is reliable.

3. Check whether the ventilation hole is unblocked.

Second, electrical connection check

1. Carefully check the connection of all wires and cables, and ensure that the wiring terminals are tight and not loose.

- For example, use a torque wrench to check the tightness of important terminals against specified torque values.

2. Check whether the identification of the wire is clear and accurate and consistent with the circuit diagram.

3. Check whether the wiring of the wires is neat and standardized to avoid crossing and confusion.

Three, insulation resistance test

1. Use the insulation resistance tester to measure the insulation resistance between the circuit in the electrical cabinet and the cabinet and between different circuits.

- It is usually required that the insulation resistance value is not less than the specified minimum value, such as 1 megohm.

2. For high-voltage circuits, the insulation resistance requirements will be higher.

Fourth, ground resistance test

1. Check the grounding system of the electrical cabinet to ensure that the grounding resistance meets the safety standard.

- In general, the ground resistance should be less than 4 ohms.

2. Check whether the ground connection is firm, corroded or disconnected.

Five, check before power

1. Check the circuit diagram again to ensure that all components are installed and connected correctly.

2. Check whether there are left tools or debris in the electrical cabinet.

Six, power debugging

1. Power on no load first, and observe whether the indicator light and instrument display in the electric cabinet is normal.

- For example, whether the power indicator light is on, whether the reading of the voltmeter and ammeter is within the normal range.

2. Gradually load and run to detect the working status of each electrical component, such as whether the contactor is normally drawn and whether the circuit breaker can normally trip.

3. Perform functional tests on the control system to verify whether the control logic is correct.

- For example, whether the control operations such as start, stop, forward and reverse are effective and meet the design requirements.

7. Performance test

1. Carry out overload protection test to check whether the protection device can act in time when overloaded.

2. Test the heat dissipation performance of the electrical cabinet and observe whether the temperature is within the allowable range during operation.

Noise and vibration detection

1. Listen to whether there is abnormal noise during the operation of the electric cabinet. If so, determine the source of noise and handle it.

2. Check whether the cabinet has obvious vibration, if so, check whether the installation is firm or whether there is a mechanical fault.

Through the above comprehensive testing and debugging steps, the problems that may exist in the production process of the electric cabinet can be effectively found and solved to ensure that it can be safely, stably and reliably put into use.