Power Calculator

HP = Horsepower
kW = Kilo Watts
kVA = Kilo Volt
I = Ampere or Current
V = Volts
PF = Power Factor

Calculating Ampere (I), given kVA.

Phase 1, 2, 3	Generator kVA	Volts Required	=	Ampere I

Converting kVA to kW

kVA	=	kW

Converting kW to kVA

kW	=	kVA

Converting kW to HP

kW	=	HP

Calculate to start a 3 phase electric motorDirect on Line (DOL) start

HP of Motor	=	Required Generator kVA

Motor Start Calculator

GENERATOR SIZE TO START MOTORS

Instructions: You only need to fill in the columns coloured in blue.
Fill in the HP of the motor(s) in their starting squence, select the start method (Direct On Line or Star Delta) and press Evaluate.

The required generator size will then be displayed at the bottom.

3 Phase (415 volt @ 50Hz) 1 Phase (240 volt @ 50Hz)

Starting Sequence	Motor HP	Start Method DOL / StarDelta	Run Variable	Phase Current	Starting Value	Total Run Current	Total Start Current
1		/
2		/
3		/
4		/
5		/
6		/

Generator Size for Starting with:

kVA*

Please NOTE the above calculations are an estimate only because other factors such as site conditions, motor efficiencies and iron losses are not taken into consideration.

Generator Size for Running with:

kVA*

Generator Size Recommended:

kVA*