Electric Hoist contactor contact burned reasons : electric hoist contactor contact burn. The reason: the repeated short-time work in the motor , the equivalent thermal current is too large , in addition to Manual Hoist the conversion process , the commutation fast, electrical contacts Analysis hoist contactor contact burned reasons : electric hoist contactor contact burn. The reason: the repeated short-time work in the motor , the equivalent thermal current is too large , in addition to the conversion process , the commutation fast, freewheeling arc contacts also cause phase short circuit and burn the contactor contacts. General motors, the operating current is less than the rated current, although the starting current of 4-7 times the rated current , but after a short time, less damage to the contacts , contacts in the design as long as the contact capacity greater than the rated current of the motor 1.25 times as you can . However, Electric Chain Hoist motor is a special motor work status , start and stop frequently overloaded , reverse braking , poor heat dissipation . Therefore, in the selection of electric hoist contactor when , as a general motor design , the characteristics of the actual work does not meet the hoist contactor burn is the inevitable result .