Electric hoist cut down from over regulation failure analysis

When the electric hoist fell down when braking distance exceeds specified requirements, electric wire rope hoist  long-term application, the brake ring wear is too large, the brake spring pressure decreases, the braking force is reduced. The workaround is to adjust the brake bolt or replace the brake ring. Motor temperature is too high should first check whether the overload to use Hulu, overload the motor heat, long-term overload the motor will burn; should also check whether the motor is required duty work, which is one of the reasons causing motor heating, motor running, the brake gap is too small, not fully disengaged, have a great friction,manual hoist friction heat, while also representing an increase of additional load, the motor speed is reduced, the current becomes large fever, you should stop working, re-adjust the brake clearance. Weight rose to the air, can not re-start after stopping the system first checks whether the voltage is too low or too volatile, pay attention to the three-phase motor operation phase, after the shutdown can not start, then you need to check the power phases. Can not stop or limit position to stop this type of situation is still not generally contactor contact welding, when you press the stop switch when the contactor contacts can not be disconnected, the motor running as usual energized, hoist without stopping; to the limit locations such as limit malfunction,hoist and trolley Hulu does not stop. After stopping, repair contactors or stopper, serious damage can not be repaired and must be replaced. Winter construction, especially after the snow, the circuit no fault motor still does not start, the reason is the brake ring frozen to death, if this Shihai forcibly boot, it is easy to burn the motor. Rope only on no less than the reason for the stroke limiter damaged, replace stroke limiter.