rope hoist switch failure reason

           Small   Rope hoist  lifting equipment and other  hoist equipment  use areas range extended from time to time, the process of applying the problems have gradually diversified  rope hoist switch today to explain the reason for failure, as the use of  rope hoist is one of the important components, so that we, as common sense understanding and control.

          rope hoist sometimes met at work after the switch but no response by the situation, which is due to  rope hoist no ordinary rated working voltage is turned, while the lead does not work, there are a few reasons in detail the following points:
1,  rope hoist Lord, damaged electrical control circuit, the line is disconnected or bad, but also make  rope hoist motor can not be energized, showing this situation, the need to overhaul the main, the control loop, in order to avoid the main overhaul, the control loop to give three-phase motor.
2, the power supply system for   wire rope hoist  whether the normal power transmission, testing ways to use test pencil tests, such as electricity and other power transmission did not get work again.
3, the load switch and isolation knife similar, there are significant gaps disconnected. Fuse is a simple electrical circuit maintenance, the principle is that when a current flows through the fuse reaches or exceeds the set value after a certain time, their melt condensation, breaking the circuit.
4,  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 voltmeters measure 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 after the use of  rope hoist.