The working system of the motor is divided intoS1-S10A total of10Class. It can be used to show the allowable cycle time of the motor under different loads, and the classification of the motor working system is a description of the load of the motor, such asThree-phase asynchronous motorSuch as starting, electric braking, no-load, load, etc., as well as the duration and order of these stages.

       S1Indicates continuous working system: such as three-phase asynchronous motor can be under constant load, the movement time is enough to achieve thermal stability.

       S2Short-time working system: under constant load, it can be operated regularly. The time is not enough for the motor to achieve thermal stability, and then the energy is stopped for enough time to make the motor cooling medium temperature and the difference between cooling to2KWithin.

       S3Intermittent cycle working system: can be operated in a series of working cycles, each week includes a period of constant load running time and a period of broken energy stop transfer time. If such a working system is used in the production of motor products, the starting current per cycle will not have a significant impact on the temperature rise.

       S4Indicates intermittent concurrent work system including start-up: run according to a series of identical working cycles, each week includes the time when the start-up temperature rise is significantly affected, the time when the constant load runs, and the time when the energy is broken.

       S5Denotes intermittent cycle working system including electric braking: run according to a series of the same working cycle, each week including start-up time, constant load running time, fast electric braking time, power off time.

       S6Indicates continuous cycle working system: run according to a series of the same working cycle, each cycle includes a period of no-load running time and a period of constant load running time, no break energy stop time.

       S7Denotes continuous cycle working system including electric braking: run according to a series of the same working cycle, each week including starting time electric braking time, constant load running time, etc., stop transfer without break.

       S8Indicates a continuous cycle working system including load and corresponding changes in speed: run according to a series of the same working cycle, each cycle includes a period or several periods of constant load operating time at different speeds and a period of constant load operating time at a predetermined speed, without breaking energy stop time.

       S9Indicates that the load and speed are aperiodic changes: The speed and load are aperiodic changes within the allowable range. This system of operation includes recurrent overload, the value can be far beyond the bar load.

       S10Indicates discrete constant load operating system: includes not less than4A discrete load value (or equivalent load) operating system, each load running time should be enough to achieve thermal stability of the motor, the minimum load value can be zero in a working cycle.

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