Fault analysis of the hottest electric hoist

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Fault analysis of electric hoist

what should we do when the electric hoist breaks down? How to eliminate? Now I'll teach you four tips:

(1) first check whether the fuse of the electric hoist power supply is burnt out. If one phase is broken, the electric hoist motor will start in single phase, and the starting torque is zero. The motor cannot rotate, so enough fuses should be replaced

(2) Secondly, the electric voltage is too low, and the starting torque is directly proportional to the square of the voltage. The accelerating torque cannot overcome the load torque and cannot reach the operating speed, so the electric voltage should be appropriately increased

(3) the stator winding is short circuited, grounded or open circuited between phases. When the winding grounding appears at the outgoing line grounding plate, the junction box should be opened for inspection

in case of open circuit, not only check the motor, but also check whether the wiring of the control equipment is correct. If the line cannot be connected due to poor contact of the AC contactor contact, use sandpaper to smooth the contact marks of the contactor. At the same time, check whether the iron core is engaged and disconnected, and whether there is jamming. If necessary, replace the contactor

(4) the load is too heavy. 8. The electrical control cabinet should pay attention to waterproof. Some domestic factories fill oil into the oil tank and have also adopted high-precision load sensors to measure the force. If the power of the electric hoist matching the motor is reasonable or the transmission shed is faulty, the lifting weight should not be overloaded. If the electric hoist cannot rotate, unload the load first. If the motor can start normally, it indicates that the transmission mechanism such as the reducer is faulty, Check the dragged mechanism and clear the fault