Analysis of equipment failure by electric hoist manufacturers

Electric hoist faults often occur in use, or due to product quality problems, or due to improper operation, or damage to accessories, various reasons are mixed. But for whatever reason, when you find that the electric hoist has failed, you need to cut off the power first. Below I summarize some of the coping skills of electric hoist faults, to facilitate timely processing, to avoid causing greater losses.
First check whether the electric hoist power fuse is blown. If one phase is broken and the motor cannot rotate, the electric hoist motor starts in single phase, the starting torque is zero, and enough fuse should be replaced.
Secondly, the grid voltage is too low, the acceleration torque can't overcome the load torque, and the starting torque is proportional to the square of the voltage. If the running speed is not reached, the grid voltage should be properly increased.
Check the motor when the circuit is broken. It may be that the contact of the contact of the AC contactor is not connected. The sandpaper should be used to smooth the contactor contact marks. Also check whether the wiring of the control device is correct. If at the same time, check the iron core. And disconnection, there is no jamming, replace the contactor if necessary. The stator winding phase is indirectly short-circuited, open circuited, or the winding grounding occurs at the grounding plate of the lead-out line. The junction box should be opened for inspection.
If the load is too large or the transmission cabinet is faulty, the electric hoist matching motor power is reasonable. The lifting weight cannot be overloaded. If the electric hoist cannot be rotated, the transmission mechanism such as the reduction gearbox is faulty. If the motor can start normally, it should be checked. Drag the mechanism to remove the load and clear the fault.