Electric hoist motor working grade

Electric hoist motor working grade classification

S1 continuous operation: the running time under constant load is sufficient to achieve thermal stability.

S2 short-term working system: at a constant load under a given time to run, the time is not enough to achieve thermal stability, followed by the power to stop enough time to make the motor again cooled to the temperature difference between the cooling medium within 2K.

S3 intermittent cycle of work: according to a series of the same duty cycle operation, each cycle includes a constant load run time and a section of the power to stop time. The starting current of each cycle in this working system does not have a significant effect on temperature rise.

S4 consists of a starting intermittent cycle of operation: operating according to a series of the same duty cycle, each cycle including a significant impact on the temperature rise of the start time, a constant load run time and a section of the energy stop time.

S5 includes the intermittent cycle of the electric brake operating system: according to a series of the same duty cycle operation, each cycle includes a start time, a constant load run time, a fast electric brake time and a section of the power stop time.

S6 Continuous cycle operation: According to a series of the same duty cycle, each cycle includes a constant load run time and a no-load run time, but no power stop time.

S7 consists of continuous braking cycles of electric braking: a series of identical duty cycles, each cycle including a start time, a constant load run time and a fast electric braking time, but no power stop time.

S8 includes continuous cycle operation of variable speed variable load: Operates according to a series of identical duty cycles, each cycle including a constant load run time at a predetermined speed, and the running time of one or more other constant loads at different speeds , But no power to stop time.

S9 load and speed non-periodic changes Operating system: load and speed within the allowable range of non-periodic work system. This work system includes frequent overload, its value can be far more than full load.