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2011/06/14 at 12:04 pm
#12188

Spir Georges GHALI

Participant

**ANSARI said: **

I Have total load current 20amps in each phase i have 3phase cunnection i want to instal a generator so will u advise me what should be the capicty of generator.

Dear Mr. ANSARI ;

to be able to calculate the Generator's power, we should know :

– Rhe Voltage's value between 2 phases.

once knowing, we apply the following formula :

S = 1.73 x U x I

where :

– S : generator's Power in ” VA “

– U : voltage between 2 phases

– I : line's current

but after calculation we should add at least 20-25 %, because the bigest effeicency for a generator done at 75-80% of his power.

Regards.