Hainan electric complete equipment
1, refused to move, misoperation fault:
This kind of fault is the main fault of high and low voltage complete sets of equipment, and its causes can be divided into two categories. One kind is caused by mechanical failure of operating mechanism and transmission system, which is manifested as jamming of mechanism, deformation, displacement or damage of components, loosening and jamming of opening and closing iron core, loose shaft pin and tripping failure. The other is caused by electrical control and auxiliary circuit, which is characterized by poor contact of secondary wiring, loose terminal, wrong wiring, burning of opening and closing coil due to jamming mechanism or bad changeover switch, ineffective switching of auxiliary switch, failure of complete sets of high and low voltage electrical equipment, operating power supply, closing contactor and microswitch. (High and low voltage complete equipment)
2, breaking and closing fault:
This kind of fault is caused by the circuit breaker itself. For the circuit breaker with little oil, it is mainly manifested as short circuit of oil injection, burning loss of the interrupter, insufficient breaking capacity, explosion when closing, etc. For vacuum circuit breakers, complete sets of high-voltage and low-voltage electrical equipment are characterized by air leakage from the interrupter and bellows, vacuum reduction, capacitor bank reignition, ceramic tube rupture, etc.
3. External force and other faults:
Including foreign body impact, natural disasters, short circuit of small animals and other unknown external forces and unexpected failures.
4, insulation failure:
Insulation level is to correctly handle the relationship among various voltages (including operating voltage and overvoltage), various voltage limiting measures and insulation strength. The complete sets of high and low voltage electrical equipment strive to make products safe and economical, and the complete sets of high and low voltage electrical equipment get good economic benefits. The insulation faults mainly include external insulation flashover breakdown to ground, internal insulation flashover breakdown to ground, interphase insulation flashover breakdown, lightning overvoltage flashover breakdown, insulator bushing, capacitor bushing flashover, pollution flashover, breakdown, explosion, lifting rod flashover, CT flashover, breakdown, explosion, insulator fracture, etc.