Wire rope hoistt does not start in three cases,

Wire rope hoist can not start three kinds of situations:
(1) supply system is not on the hoist power transmission, usually with test pencil tests, such as no power transmission, power transmission, etc. after work;
(2) the main chain hoist, electrical control circuit is damaged, the line is disconnected or bad, it will not be able to hoist the motor is energized, this occurs, the need to repair the main, the control loop, maintenance, in order to prevent the main, control Loop gave power phase three-phase motors and burned the motor, or a sudden was  Wire rope hoist  motor running, cause harm, be sure to hoist the motor is disconnected from the power line, only to master, control circuit power transmission, and then move the starter and stop switches, electrical control and circuit inspection and analysis of the work on the problem of electrical or line repair or replacement, when the confirmation Lord, control circuit trouble, before re-commissioning;

(3)  Wire rope hoist  motor terminal voltage is lower than the rated voltage of more than 10%, motor starting torque is too small, so do not move goods lifting hoists, 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. Sometimes, hoist motor voltage is normal, while the hoist is not working, it should be considered for other reasons, for example: motor is burned, overhaul need to replace the motor; Wire rope hoist unused for long periods, poor maintenance, the brake wheel and cover rust , starting off the brake wheel is not open, the motor only issued a "hum" sound, turn it up,  lift hoist  does not work. At this time, you should remove the brake wheel, cleaning corroded surfaces, and then re-test; serious motor sweep chamber, but also make the motor does not rotate, found this situation, you should stop using the motor must be overhauled or replaced in order to ensure the normal hoist work. In addition, the production of non-overloading using Wire rope hoist, when the goods are excessively overloaded,  rope hoist  crane does not move goods, the motor will only issue a "hum" sound, rather than running, and in severe burning motor, or even cause an accident, then should immediately stop reduce the cargo, the gourd work at rated power.