rope hoist switch failure

      Small  hoist equipment  field of use, expanding the scope of use issues are becoming increasingly diverse, and today we are discussing the reasons for failure of  rope hoist  switch, Wire rope hoist used as an important part, so that we, as common sense to understand and master. Wire rope hoist sometimes met at work after the switch did not respond by the situation, which is generally not turned on because the  rope hoist  rated working voltage, which led to not work, there are a few specific reasons in mind:
1, the power supply system for  rope hoist  power transmission is normal, the detection method using test pencil tests, such as no power transmission, power transmission, etc. after work.
2, the main hoist, electrical control circuit is damaged, the line is disconnected or bad, but also make Wire rope hoist motor can not be energized, such a situation, the need to repair the main, the control loop, maintenance, in order to prevent the main, the control loop to send for three-phase motors.
3,  rope hoist  motor terminal voltage lower than the rated voltage of more than 10%, motor starting torque is too small, so that does not move cargo lifting hoist, and can not work, check with a multimeter or voltage meter and other measuring motor input voltage, indeed because the voltage is too low, the motor can not be started, the need to wait for the system voltage returns to normal before using Wire rope hoist.
4, the load switch and isolation knife similar, there are significant gaps disconnected. Fuse is a simple electrical circuit protection, the principle is that when the current flowing through the fuse reaches or exceeds the setting value after a certain time, the melt itself melting the circuit.
      About  wire rope hoist  switch failure, there are other reasons exist.