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1. For faulty electrical equipment, it is not necessary to start the operation. First, we should inquire about the occurrence of the fault before and after the failure. For unfamiliar equipment, the principle and structure of the circuit should be familiar, and the corresponding rules should be followed. Removal should be thoroughly familiar with all electrical components before the function, location, connection mode and its relationship with other devices around, in the absence of the assembly diagram, should disassemble, sketching, and on the tag.
2. Check the equipment for obvious cracks, defects, maintenance history, service life, etc., and then check the machine. Before disassembly, the fault factor should be in line, so that it can be disassembled after the failure of the machine. Otherwise, it can be dismantled blindly, and the equipment may be damaged.
3. Electrical inspection shall be conducted only after the mechanical parts have been confirmed. When checking the fault of the circuit, the detecting instrument should be used to look for the fault location. After confirming that there is no contact defect, the operation relationship between the line and the machine should be checked to avoid miscalculation.
4. When the equipment is not fully charged, the equipment button, contactor, thermal relay and fuse are judged to determine the fault location. Electrical test, listen to its sound, test parameters, diagnose faults, and finally repair. If the three-phase voltage value cannot be determined when the motor is missing, it is necessary to listen to its sound and measure each relative voltage separately to determine which phase defect.
5. To clean the heavier electrical equipment, clean the buttons, wiring points and contact points, and check whether the external control key fails. Many faults are caused by dirt and conductive dust, which can be eliminated once cleaning failure occurs.
6. The failure rate of the power supply part is very high in the whole fault equipment, so the maintenance of the power supply can be twice as much.
7. Faults caused by the failure of assembly parts quality or other equipment generally account for about 50% of common faults. The special faults of electrical equipment are soft faults, which should be measured and repaired by experience and instrument.
8. Don't rush to replace the damaged electrical parts, and consider replacing the damaged electrical parts when the peripheral circuit is normal.
9. During maintenance, check the static working point of the dc loop and the dynamic working point of the ac circuit.
10. For the debugging and failure of the electrical equipment, the fault should be eliminated first, and then debugging must be carried out on the premise of the electric line speed.
2. Check the equipment for obvious cracks, defects, maintenance history, service life, etc., and then check the machine. Before disassembly, the fault factor should be in line, so that it can be disassembled after the failure of the machine. Otherwise, it can be dismantled blindly, and the equipment may be damaged.
3. Electrical inspection shall be conducted only after the mechanical parts have been confirmed. When checking the fault of the circuit, the detecting instrument should be used to look for the fault location. After confirming that there is no contact defect, the operation relationship between the line and the machine should be checked to avoid miscalculation.
4. When the equipment is not fully charged, the equipment button, contactor, thermal relay and fuse are judged to determine the fault location. Electrical test, listen to its sound, test parameters, diagnose faults, and finally repair. If the three-phase voltage value cannot be determined when the motor is missing, it is necessary to listen to its sound and measure each relative voltage separately to determine which phase defect.
5. To clean the heavier electrical equipment, clean the buttons, wiring points and contact points, and check whether the external control key fails. Many faults are caused by dirt and conductive dust, which can be eliminated once cleaning failure occurs.
6. The failure rate of the power supply part is very high in the whole fault equipment, so the maintenance of the power supply can be twice as much.
7. Faults caused by the failure of assembly parts quality or other equipment generally account for about 50% of common faults. The special faults of electrical equipment are soft faults, which should be measured and repaired by experience and instrument.
8. Don't rush to replace the damaged electrical parts, and consider replacing the damaged electrical parts when the peripheral circuit is normal.
9. During maintenance, check the static working point of the dc loop and the dynamic working point of the ac circuit.
10. For the debugging and failure of the electrical equipment, the fault should be eliminated first, and then debugging must be carried out on the premise of the electric line speed.
