High and low voltage distribution cabinets play a vital role in the power system. Ensuring their normal operation is essential for the stability and safety of power supply. The following are the precautions for the maintenance of high and low voltage distribution cabinets.
- Preparation before maintenance
Develop a detailed maintenance plan: clarify the time, content, and division of labor of maintenance personnel, etc., to ensure that the maintenance work is carried out in an orderly manner.
Prepare necessary tools and equipment: such as multimeters, insulating gloves, insulating boots, wrenches, etc., to ensure the integrity and applicability of tools and equipment.
Train maintenance personnel: familiarize them with the structure, principle and maintenance methods of the distribution cabinet, and master safe operating procedures.es and impacts.
- Precautions for maintenance of high-voltage distribution cabinets
Safety first
Maintenance personnel must wear protective equipment such as insulating gloves and insulating boots to ensure their own safety.
Before performing maintenance work, the high-voltage power supply must be disconnected and grounded to prevent electric shock accidents.
It is strictly forbidden to perform maintenance work when the high-voltage distribution cabinet is in operation.
Cleaning and inspection
Clean the high-voltage distribution cabinet regularly, remove dust and debris in the cabinet, and keep the equipment clean.
Check the appearance of the high-voltage distribution cabinet to see if there is any deformation, damage, etc.
Check the sealing performance of the high-voltage distribution cabinet to ensure that the cabinet door is well sealed to prevent dust and moisture from entering.
Electrical component inspection
Check the working status of electrical components such as high-voltage circuit breakers, disconnectors, and load switches to see if they are normally opened and closed and whether the contact is good.
Check whether the fuse of the high-voltage fuse is intact. If it is blown, it should be replaced in time.
Check the operation of high-voltage transformers, lightning arresters and other equipment to see if there are any abnormal phenomena.
Insulation performance test
Regularly test the insulation performance of high-voltage distribution cabinets, use insulation resistance testers to measure insulation resistance, and ensure that the insulation performance meets the requirements.
Perform voltage withstand tests on high-voltage distribution cabinets to test the voltage withstand capacity of the equipment.
- Precautions for maintenance of low-voltage distribution cabinets
Safety measures
Maintenance personnel should also wear appropriate protective equipment, such as insulating gloves, safety helmets, etc., when performing maintenance on low-voltage distribution cabinets.
After disconnecting the low-voltage power supply, a tester should be used to test the power to ensure that there is no power before performing maintenance work.
Cleaning and tidying
Keep the low-voltage distribution cabinet clean and regularly clean the dust and debris in the cabinet.
Sort the wires and cables in the cabinet to ensure that the wiring is neat and avoid confusion.
Electrical component inspection
Check the working status of electrical components such as low-voltage circuit breakers, contactors, relays, etc. to see if they are operating normally and whether the contact is good.
Check whether the fuse of the fuse is intact. If it is blown, it should be replaced in time.
Check whether the control components such as indicator lights and buttons are working properly.
Grounding inspection
Check the grounding of the low-voltage distribution cabinet to ensure that the grounding is good and the grounding resistance meets the requirements.
Regularly test the grounding system to ensure the reliability of the grounding system.
- Inspection and testing after maintenance
Check whether the maintenance work is completed: confirm that all maintenance contents have been completed without omission.
Perform functional test: Power on the high and low voltage distribution cabinets to check whether the functions of the equipment are normal.
Record maintenance status: Record the problems found and treatment methods in the maintenance process in detail to provide reference for future maintenance work.
In short, the maintenance of high and low voltage distribution cabinets is an important and meticulous work, which requires maintenance personnel to have professional knowledge and skills, strictly abide by safety operating procedures, and ensure the quality and safety of maintenance work. Only in this way can the normal operation of high and low voltage distribution cabinets be guaranteed, and the stability and safety of the power system can be guaranteed.
