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Soft Starter For Air Conditioner Compressor Application


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#1 schow

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Posted 08 April 2010 - 03:12 PM

Dear all,

I have some questions here about applying soft starters for air conditioner's compressors:-

1) What exactly is "anti short cycle" of air conditioner's compressors? Someone told me that "anti short cycle" time (typically 3 minutes) is required in order for the pressure inside the compressor to stable down so that it would not draw huge current when start again after the last stop, is this right?

2) If I was using a soft starter to start a air conditioner's compressor, do I still need the "anti short cycle" period? or I can just start the compressor immediately after it stopped?

3) If I did not apply the "anti short cycle" timer, will this damage the compressor?

Please kindly advice!

Cheers! blink.gif

#2 jraef

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Posted 02 May 2010 - 11:41 PM

QUOTE (schow @ Apr 8 2010, 08:12 AM) <{POST_SNAPBACK}>
Dear all,

I have some questions here about applying soft starters for air conditioner's compressors:-

1) What exactly is "anti short cycle" of air conditioner's compressors? Someone told me that "anti short cycle" time (typically 3 minutes) is required in order for the pressure inside the compressor to stable down so that it would not draw huge current when start again after the last stop, is this right?

2) If I was using a soft starter to start a air conditioner's compressor, do I still need the "anti short cycle" period? or I can just start the compressor immediately after it stopped?

3) If I did not apply the "anti short cycle" timer, will this damage the compressor?

Please kindly advice!

Cheers! blink.gif

Short Cycle protection for refrigeration compressors is essential, it has to do with the thermal expansion / compression cycle. Failure to use it can result in the loss of your compressor.
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#3 schow

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Posted 20 April 2011 - 02:53 AM

Dear all,

guten tag!

I had some soft starters installation recently for air conditioner's compressors.

I was told by my senior that for compressor applications, the "ramp down" time should be set to '0' that they could not have soft stop, when I asked why, he just told me that is what everyone do and could not answered me technically.

Please can anyone out there explain to me why compressors should not be soft stopped?

dunke!

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