How to Calculate Proper Transformer or Generator Size Based on Load in kVA

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#1 21683892 29 Jan 2020 16:20

Nacanieli Tabua Nacanieli Tabua

Anonymous

Post #1
21683892 29 Jan 2020 16:20

Hi all,
How does one size a transformer or generator?...Certain articles I read stated it must be 1.5 to 2 times that of the actual load in kVa....Can any one explain...
Thanks
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#2 21683893 31 Jan 2020 13:50

David Ashton David Ashton

Anonymous

Post #2
21683893 31 Jan 2020 13:50

1.5 to 2 times the MAXIMUM rated load is a good margin. You can go less than that, but at risk of reducing the reliability. If your generator / transformer gets a voltage surge, or maybe a fault condition in the load, it's far more likely to handle such an overload without problem if it is conservatively rated like this. It's not an absolute requirement but it is just good design practice.
#3 21683894 31 Jan 2020 15:15

Nacanieli Tabua Nacanieli Tabua

Anonymous

Post #3
21683894 31 Jan 2020 15:15

Ok.
Thank you Mr. Ashton. Appreciate it.
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How to Calculate Proper Transformer or Generator Size Based on Load in kVA

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