electric hoist Fault detection

- Dec 13, 2018-

Analysis of the reasons why electric hoist does not work

1. Analysis of the reasons why the electric hoist cannot run. It is possible to check whether the power fuse of the equipment is blown. If it is broken, it is impossible to rotate and the starting torque is zero, so the motor of the equipment will not be To operate, it is necessary to replace a fuse that is large enough.


2, there is the voltage is too low, so the dynamic torque of its equipment is proportional to the square of the voltage, the acceleration torque can not overcome the load torque, can not reach the running speed, what needs to be done is to increase the supply voltage of the equipment .


3, stator winding phase-to-phase short circuit, grounding or open circuit, which means that the winding grounding wire of the electric hoist appears at the lead grounding plate, what needs to be done is to open the junction box to check. It should be noted that it is not possible to check the motor during the short circuit. It is necessary to check whether the wiring of the control device is correct. If the contact of the contactor of the AC contact is not good, the wire should be contacted. The spots are smoothed, and at the same time, it is necessary to check the iron core for the opening and closing, whether there is any jamming or not, and if so, it needs to be replaced.


4, there is also a need to pay attention to is that if the load is too large, it will not be able to lift heavy objects can not be overloaded, that is, the electric hoist can not work, the solution is to first remove the load, if the motor can be started normally, It indicates that the transmission mechanism such as the reduction gearbox is faulty, check the driven mechanism, and clear the fault. When the machine is running again, the entire crane needs to be tested, and after the running test is good, it is put into use.