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shuyitop

Zhejiang Shuyi Electric Co. Ltd

Soft starter, as the main component of soft start control cabinet, plays a very important role in soft start control cabinet. Soft start control cabinet through soft start with control switch, contactor and so on to control various power equipment. Soft start control cabinet is widely used in the control of different electrical equipment.

According to the function of the soft starter, it is suitable for the following occasions:

1. Where it is required to reduce the starting current of the motor.

2. During normal operation, the motor does not need to have a speed regulation function, and only solves the working state of the starting process.

3. During normal operation, the load is not allowed to step down or slow down.

4. The power of the motor is large (such as greater than 100kW), which will cause adverse effects on the operation of the main transformer during startup.

5. The equipment is precise, and the start-up shock is not allowed when the equipment is started.

6. The starting torque of the equipment is not large, and it can be started with no load or light load.

7. Medium and large motors need energy-saving starting. From the initial investment point of view, it is more economical to use an auto-decompression starter for motors with a power below 75kW, and it is more cost-effective to use a soft starter for motors with a power of 90-250kW.

8. Machinery for short-term repetitive work. This refers to machinery with long-term no-load (light load less than 35%), short-term heavy load, high no-load rate, or machinery with low load duration rate, such as cranes, belt conveyors, metal material calenders, lathes, punches , planer, shearing machine, etc.

9. Work machinery with functions such as sudden jump, smooth acceleration, smooth deceleration, quick stop, low-speed braking, and accurate positioning is required.

  10. Motors with long-term high speed and short-term low speed. When the load rate is lower than 35%, the soft starter has better energy saving effect.

11. Where there are multiple motors and these motors do not need to be started at the same time.

12. The occasions where the motor is not allowed to shut down instantly. Such as high-rise buildings and other pump systems, if the instantaneous stop, will produce a huge “water hammer” effect, causing damage to the pipeline and even the pump.

 13. It is especially suitable for various pump loads or fan loads that require soft start and soft stop.

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