The general level of work is M4, M5 is the working level of electric hoist. The main characteristics of the operation load and frequent use of electric hoist. If often full load, frequent use, the higher the level of work required electric hoist. The higher the level of work, the greater the workload of the motor, the better the performance of the motor, and some need special motor. The working level of electric hoist does not correspond to the working level of 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 working level -S3 intermittent cycle operation: according to a series of the same working cycle, each cycle includes a constant load operation time and a period of time to stop the power to stop.
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.

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