LBMEFM
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| posted on 19/4/11 at 12:43 PM |
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Power required
I have a air compressor which on the plate states 230 - 240v / 50hrz / 8amp and I believe it has a 1.75hp motor. I want to run this off a petrol
generator, what size generator do I need in Kv (ie 1 Kv 2.5Kv 8Kv etc etc.) Thanks Barry
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Daddylonglegs
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| posted on 19/4/11 at 12:50 PM |
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I would say at least a 2.2kw genny.
It looks like the Midget is winning at the moment......
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Madinventions
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| posted on 19/4/11 at 12:51 PM |
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240V x 8A = 1920W, so a 2KW generator will be running near to it's limit. (KV is kilovolts, KW is kilowatts. Power is measured in watts...)
I'd suggest a 3 to 4KW generator to be on the safe side.
As a secondary check, 1hp is approx 750W, so a 1.75hp motor consumes about 1.3KW. I'd still go for 3KW or more though!
Ed.
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carpmart
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| posted on 19/4/11 at 01:10 PM |
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Its not the steady state running that is an issue running a compressor off a genny, more the initially pull to kick it into action. Even quite small
compressors need a good lump of power from a genny to get them running!
You only live once - make the most of it!
Radical Clubsport, Kwaker motor
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big-vee-twin
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| posted on 19/4/11 at 02:07 PM |
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240 x 8amps = 1940 va, then you need to take account of power factor which will be about 0.8
so 1940/0.8 = 2425 watts
then you need to take account of starting current. 
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
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