# Power Calculators

If you require assistance with this Power Calculator or what generator will best suit your requirements, do not hesitate to contact us.

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 = GeneratorkVA Required

### Generator Size to Start Motors

Instructions: Fill in the HP of the motor(s) in their starting sequence, select the start method (DOL - Direct On Line or Star Delta) and press Calculate. 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* Generator Size for Running with: kVA* Generator Size Recommended: 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.

### Power Consumption Calculator

ApplianceRated WattsRated kVARated kVA
(Appliances)(To operate appliance)( To start appliance)
Air Conditioner (Evaporative model)275-10000.34-1.251.36-5
Air Conditioner (Reverse cycle)200-25000.25-3.131-12.5
Clothes Dryer240033
Coffee Percolator5500.690.69
Can Opener1000.130.52
Deep Freezer5000.632.52
Disposal Unit6500.813.24
Dishwasher1000-30001.25-3.751.25-3.75
Domestic Water Pumps275-10000.34-1.251.36-5
Exhaust Fan400.050.2
Food Processor5000.632.52
Floor Polisher3500.441.76
Frypan14001.751.75
Hair Dryer15001.881.88
Hotwater Service2500-30003.13-3.753-13-3.75
Iron800-15001-1.881-1.88
Kettle or jug1600-30002-3.752-3.75
Lights25-2000.03-0.250.03-0.25
Microwave15001.881.88
Oven4000-80005-105-10
Refrigerator (home)3000.381.52
Sewing Machine600.080.32
Space Heater20002-52.5
Television75-2000.09-0.250.09-0.25
Toaster250-12500.3-1.560.3-1.56
Washing Machine500-30000.63-3.752.52-15
Welder 140A50006.258 min