Subaru Robin SGX3500 - Manual (Page 10)

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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 formula mentioned below.
(Output of electrical appliance) ＝ (Power consumption)
(Efficiency)
Efficiencies of some electrical appliances are as follows :
Single-phase motor . . . . . 0.6 to 0.75 The smaller the motor, the
Fluorescent lamp . . . . . . 0.7 to 0.8 Lower the efficiency.
Example 1 : A 40W fluorescent lamp means that its luminous output is 40W. Its efficiency is 0.7
and accordingly, power consumption will be 40÷0.7= 57W. As explained in Item (2),
multiply this power consumption value of 57 W by 1.2 to 2 and you will get the figure
of the necessary capacity of a generator. In other words, a generator with a rated
output of 1000W 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 multiple of 570
W by 1.2 to 3 as explained in the ltem (3). 570 (W) × 1.2 to 3 = 684 (W) to 1710 (W)
SGX3500 SGX5000 SGX7500
Incandescent lamp, Heater 3200 4500 6700
Fluorescent lamp, Electric tool 1750 2500 3700
Mercury lamp 1250 1800 2650
Pump, Compressor 800 1100 1650
Applicable Wattage(approx. W)
Applications
Table.4-1