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The cause of Explosion proof Crane Hoist Safety can not start, operation

The cause of Explosion proof Crane Hoist Safety can not start, operation   

 Crane Hoist Safety

Explosion-proof Crane Hoist Safety is a small light lifting equipment, and light weight, small size, large lifting capacity. When the explosive mixture with plant, improve labor productivity tools on the premise of ensuring safety, is necessary for the production of machinery and equipment. In the discovery of explosion-proof Crane Hoist Safety can not start, operation phenomenon, the first thing is to check the reasons for the failure to run.

First of all, check the explosion-proof Crane Hoist Safety power fuse whether burned. If a broken phase, when the motor is starting phase, the starting torque is zero, then the hoist motor cannot rotate enough should replace the fuse.

Secondly, explosion-proof Crane Hoist Safety does not rotate may be low voltage power grid. Because the starting torque is proportional to the square of the voltage, the acceleration torque can not overcome the load torque, so it can not reach the running speed. At this time, the voltage of the power grid should be appropriately improved.

Thirdly, the stator winding may be short circuited, grounded or open circuited. If the grounding of the winding occurs at the floor of the outlet line, the junction box should be opened for inspection. If there is a circuit break, not only to check the motor, but also should first check the control equipment wiring whether correct. If the contact of AC contactor is bad, the circuit can not be connected, The application of sand paper contactor contact spot grinding flat. At the same time to check off, disconnect the situation of iron core, whether there is a jam phenomenon, replace the appropriate contact if needed.

 

Finally, it is possible that the explosion-proof Crane Hoist Safety is too heavy or the transmission machinery is out of order, General Crane Hoist Safety matching by the power of the motor is reasonable. When lifting heavy objects cannot overload condition, if there is a Crane Hoist Safety can't turn the situation, should be removing the load. If the motor can start normal, that the reducer and transmission mechanism fails, should be checked by dragging mechanism, so as to remove the fault.

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