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#1 |
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Could someone please confirm my understanding of 3 phase generators power output. I'm in Australia so all calculations are in 240v
A 30kVA generator in total can provide a theoretical maximum of 30,000/240 = 125A which would be 41.6A per phase? Using a power factor or 0.8 we get a total of 125*0.8 = 100A or 33.3A per phase. So a 30kva generator is capable of running 3x32 amp distribution boxes? Cheers |
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#2 |
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In the real world, the alternator is loaded by real loads.
Distribution boxes are NOT real loads. They are distribution nodes. You have to ask yourself: "What are the actual net loads to be served?" This calculation is termed a load-calc... what else? Set-up a spread sheet program and punch in the numbers. You'll want to look at actual Watts as well as keep an eye on Power Factor. ( If poor, the latter doesn't load up the alternator, but does figure in conductor sizing. ) Last edited by telsa; 11-08-2018 at 12:10 AM. |
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#3 |
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Thanks
So assuming unrealistic ideal loads I'm correct? Just after a sanity check that I'm not out by a factor of 3. |
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#4 |
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Huh?
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#5 | ||
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Quote:
EDIT: I just realized I may be misreading this. Is the 240V L-L or L-N? Last edited by AK_sparky; 11-08-2018 at 01:47 PM. |
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#6 |
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240v x 1.73 x 33.3a= @13KW
brian john likes this.
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#7 |
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30X1000/240x1.732= 72.23 amps
30X.8/x1000/240X1.723= 57.78 amps or somewhere close to that
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Ah, but I was so much older then, I'm younger than that now Last edited by brian john; 11-08-2018 at 08:32 PM. |
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