Trouble shooting for lack of phase of gantry crane electric hoist

Electrical damage, disconnection or poor contact of the main and control circuits of the hoist will also cause the hoist motor to lose phase and cannot work normally. In this case, the main and control circuits need to be overhauled. During the overhaul, in order to prevent the main and control circuits from sending.

The power supply of the three-phase motor loses phase and burns the motor, or the hoist motor is suddenly energized and runs, causing harm. Be sure to disconnect the hoist motor from the power line, and only supply power to the main and control circuits, and then activate the start and stop switches.

Check and analyze the working conditions of the control electrical appliances and circuits, repair or replace the defective electrical appliances or circuits, and re-test after confirming that the main and control circuits are not faulty.