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What capacity of a single phase generator do you require to power 8no 2.5hp compressors of 220 volts?
Eseyin
1 Hp is roughly 746 watts. If you have 8 motors, each 2.5hp, you have a total of 20hp of load, roughly 15kW. Efficiency isn't 100%, but you're likely not fully loading all 8 motors either. to be safe I would look at 80% effiency, so you'd need ~18.7kW; A 20kW generator should be plenty. If all turn on at the same time, you may have some trouble due to excessive starting current.
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