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Four kinds of starting method of air compressor

Time: 2016-08-19

There are four kinds of starting method of air compressor, direct starting, star-delta starting, soft starting, and variable frequency starting.

1) Direct starting: the starting current of direct starting is 7 to 8 times of running current, it has great impact to the power grid, it is mainly used in small compressor and middle commercial air conditioner.

2) Star delta starting: the starting current of star delta starting is 3 to 4 times of running current, it is widely used for middle piston compressor, screw compressor, centrifugal water chiller or compressor.

3) Soft starting: the starting current of soft starting is 2 to 3 times of running current, it is used in large piston compressor, screw compressor, centrifugal water chiller or compressor.

4) Variable frequency starting: the starting current of variable frequency starting is less than 1.5 times of running current, it is the most stable starting method. It mainly used in large piston compressor, screw compressor, centrifugal water chiller or compressor.