NZ Generator Calculator

These calculators will assist you in determining what size generator you may require or how to convert one unit of electricity to another.
Please note: All calculations are using 0.8 power factor.

These calculators will calculate:
Amperes when kVA is known
Converting kVA to kW
Converting kW to kVA
Converting kW to HP
kVA Required to run motors

Guide to units:

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

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

kVA	=	kW

kW	=	kVA

kW	=	HP

HP of motor	=	Generator kVA required

Instructions: Add a number in the yellow column(s) below.
Enter 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

Generator Size for Starting with:

kVA*

Generator Size for Running with:

kVA*

Generator Size Recommended:

kVA*

* DISCLAIMER: This is a Guide Only – please contact NZ GENERATOR for exact sizing.

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