Altrad Belle GPX 2700, Руководство оператора

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12
Estimating Power Consumption
GB
GENERAL GUIDELINES
Refrigerators, freezers, compressors and central heating pumps usually have induction type motors and the starting current can be
three times higher than the running current.
Fluorescent lamps require approx 1.5 times their stated wattage to start-up.
Microwave ovens are often referred to by their cooking power, which is often half the operating power. Starting up the oven consumes
an extra 25%, which is used to energise the capacitor. This means that a microwave rated at 600 Watts (cooking power) actually
needs 1500 watts to operate it.
It is essential to consult the manufacturer when considering using electric welders.
Examples
a) Kettle (Speci
¿
cation: 230V 50Hz, 2200W, unknown Amps) - Resistance load
Indicated wattage of resistance type load = 2200 = 2200 VA or 2.2kVA to operator
Power factor for resistance 1
Speci
¿
ed voltage of the x Measured current of the = 110 x 5.5 = 605 VA or 0.605 kVA to operate
inductive/capacitive load inductive/capacitive load
b) Mini 150 concrete mixer (Speci
¿
cation: 110V 50Hz, 600W, 5.5A) - Inductive / Capacitive load
The power required to start the mixer is actually 3 x this amount, therefore: 3 x 0.605kVA = 1.815 kVA to start the machine.