Analysis of the causes of power transmission tripping faults in low-voltage switchgear.
What happened when the low-voltage distribution cabinet was shut down and all power was cut off? Generally speaking, there is a serious short circuit fault or common grounding device fault in the main control circuit. The trip cannot be pushed, not just the load. Short circuit faults and microcomputer protection. Many mechanical devices experience abnormalities throughout the entire application process, and low-voltage distribution cabinets also experience corresponding common faults during the application process. The specific root cause of power outage in low-voltage distribution cabinets:
1. Short circuit fault, there is a short circuit fault in the power circuit. The clearing method is to find the location of the short circuit fault and clear the short circuit;
2. Load: The power circuit is overloaded, and the power switch overload protector is running. The disassembly method is to disassemble and replace the power switch, and select a current capacity that exceeds 10% of the load.
3. It is likely related to the quality of the low-voltage cabinet. Customers may not pay attention to the quality of high-voltage switchgear when choosing it, and some products in certain fields are of poor quality. Therefore, its quality factor is also the main factor that endangers the effectiveness of the box.
4. Some different types of AC contactors may cause improper combustion of their doors, leading to common malfunctions.
5. Thermal conductivity issues with high-voltage switchgear and poor heat dissipation of server cabinets during high temperature weather. If you increase the current a lot and the connection is a bit loose, this problem will occur. The aging of the plastic insulation layer of the copper core wire inside the cabinet is caused by the engineering explosion of the shell.
The common faults of low-voltage cabinets are also related to the surrounding temperature. Some high temperatures. Ultra low temperature natural environment and humid and cold natural environment can interfere with its application. Some kitchen cabinets placed outside can also be exposed to the high temperature hazards of the sun. This high temperature element can increase the temperature of mechanical equipment in high-voltage switchgear, making low-voltage distribution box components unable to withstand it, resulting in common faults caused by overheating of electrical components.
7. Related to DC contactors, models, specifications, models, etc. The volume of DC contactors varies for different product models and specifications. If not correct, it is easy to damage the AC contactor.
The above are the key reasons for power outages in
low-voltage distribution cabinets, so there are other issues as well. In fact, normal maintenance is also crucial for low-voltage distribution cabinets. Therefore, users should pay attention to normal maintenance and solutions
