Subaru Robin RGD3300H - Manual (Page 17)

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(5) Appliances without any indication as to power consumption
Some appliances have no indication as to power consumption; but instead the work load (output) is
indicated. In such a case, power consumption is to be worked out according to the numerical for-
mula mentioned below.
Efficiencies of some electrical appliances are as follows:
Example 1: A 40 W fluorescent lamp means that its luminous output is 40 W. Its efficiency is 0.7 and
accordingly, power consumption will be 40 ÷ 0.7 = 57 W. As explained in Item (2), multi-
ply this power consumption value of 57 W by 1.2 ~ 2 and you will get the figure of the
necessary capacity of a generator. In other words, a generator with a rated output of
1000 W capacity can light nine to fourteen 40 W fluorescent lamps.
Example 2: Generally speaking, a 400 W motor means that its work load is 400 W. Efficiency of this
motor is 0.7 and power consumption will be 400 ÷ 0.7 = 570 W. When this motor is used
for a motor-driven tool, the capacity of the generator should be multipled by 1.2 to 3 and
570 W as explained in the Item (3).
(Output of electrical appliance)
= (Power consumption)
(Efficiency)
Single-phase motor ............... 0.6 ~ 0.75
The smaller the motor, the lower the efficiency.
Three-phase motor ................ 0.65 ~ 0.9
Fluorescent lamp ................... 0.7 ~ 0.8
MODEL RGD3300H RGD5000H
Frequency 60 Hz 60 Hz
Incandescent lamp, heater, etc. 3,300 W 4,500 W
Fluorescent lamp, mercury lamp, etc.
approx.
2,200 W
approx.
3,000 W
Motor-driven tool, general-purpose motor, etc.
approx.
1,900 W
approx.
2,700 W
Water pump, compressor, etc.
approx.
950 W
approx.
1,300 W
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