The general work level is M4 and M5 is the working level of the electric hoist. Main characteristics of electric hoist running load and frequency of use. If the full load, frequent use, the required level of electric hoist work is higher. The higher the level of work, the greater the amount of motor work, the better the required motor performance, and some require special motors. The working level of the electric hoist does not correspond with the working level of the motor.
Electric hoist motor working level -S2 short work: according to the given operation time under constant load, the lack of time to reach thermal stability, then stopped enough time to make the motor again cool down to ambient temperature difference within 2K.
Electric hoist motor grade -S3 intermittent cycle operation: according to a series of the same cycle operation, each cycle includes a constant load, running time and a break energy stop time.
Electric hoist motor starting level -S4 duty cycle: according to a series of work in the same period, each cycle including a rise significantly affected the starting time, a constant load running time of temperature and a stopping electric hoist motor including electric braking intermittent level -S5 periodic duty: according to a series of work in the same period, each cycle comprises a starting time, a constant load running time, a fast electric braking time and a stopping.
Electric hoist motor level -S6 continuous periodic duty: according to a series of work in the same period, each cycle comprises a constant load running time and a no-load running time, but without stopping.
Electric hoist motor level -S7 includes electric braking system: a continuous cycle of work according to a series of work in the same period, each cycle comprises a starting time, a constant load running time and a fast electric braking time, but without stopping.
Electric hoist motor including variable load level -S8 continuous cycle work: according to a series of work in the same period, each cycle includes a predetermined rotational speed under constant load running time, and one or more other constant at different speeds and loads the running time, but no fault can stop transfer time.