Calculators

W. C. Andree Engines & Power Systems
1714 North Pearl Street, Centralia, Washington 98531 ---- Phone: 1 (360) 736-5425 ---- Cell Phone: 1 (360) 623-4995
Email: wcaeaps@yahoo.com ----- In-house Financing Available ----- Make Checks Payable To: WCAEAPS

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 = Kilowatts kVA = Kilovolt Amps	I = Ampere or Current E = Volts P.F. = Power Factor

3 Phase Calculations

Converting kVA to kW
kVA	=	kW

Converting kW to kVA
kW	=	kVA

Converting kW to HP
kW	=	HP

What size generator is needed to start a 3 phase electric motor Direct on Line (DOL) start
HP of Motor	=	Generator kVA Required

Generator Size Required to Start Motors

Instructions: You only need to fill in the columns colored in blue.
Fill in the HP of the Motor (s) in their starting sequence, 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 @ 60Hz)
1 Phase (240 volt @ 60Hz)

Starting Sequence Motor HP Start Method
DOL / Star Delta Run Variable Phase Current Starting Value Total Run Current Total Start Current

1 /

2 /

3 /

4 /

5 /

6 /

Generator Size for Starting with:	kVA*
Generator Size for Running with:	kVA*
Generator Size Recommended:	kVA*

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