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Thread: Prestcold
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25-05-2010, 09:00 PM #1
Prestcold
Hi there! Does anyone know the KW of a prestcold R750/0138 ?? I have 19 amps but i am going to use a soft start (experiment!!) and i must know the kw...
The label on the compressor unfortunately is erased from the years... Thanks anyway!!
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25-05-2010, 09:18 PM #2
Re: Prestcold
I think thats a 7.5HP compressor, is it a big cast iron three cylinder 3ph compressor?
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25-05-2010, 09:35 PM #3
Re: Prestcold
Yes that right!! Thanks !!!
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25-05-2010, 09:37 PM #4
Re: Prestcold
7.5 hp is 5.56 kw
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25-05-2010, 09:41 PM #5
Re: Prestcold
To be exact i do not know if it has 3 cylinders...the head is big though...you maybe right but i am not sure! Thanks anyway.
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25-05-2010, 09:44 PM #6
Re: Prestcold
I can convert Kw to hp but i do not know either.... I think that it is 7,5 hp too, if i compare suction-discharge-amps...etc .Thank to all
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25-05-2010, 11:17 PM #7
Re: Prestcold
The first numbers indicate the horsepower and the last figures (0138) the displacement, the R indicates the body type.
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25-05-2010, 11:26 PM #8
Re: Prestcold
you can not size your electrical on the nominal hp (which actually only rates to power drawn at a fixed condition) in this case 7.5Hp, you must use your amps for sizing a soft starter, which 19amps max sounds about right 400v 3phase 50hz which would be close to 9.5kw
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26-05-2010, 03:21 AM #9
Re: Prestcold
Well explained MF. The LRA is the main thing to bare in mind.
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