Robin America RGX7100 Service Manual page 14

(5).. A ppliances.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)
Efficiencies of some electrical appliances are as follows :
Single-phase motor . . . . 0 .6 to 0 .75
Fluorescent lamp . . . . . . 0 .7 to 0 .8
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)
Incandescent.lamp,.Heater
Fluorescent.lamp,.Electric.tool
Mercury.lamp
Pump,.Compressor
(Efficiency)
Applications
= (Power consumption)
Applicable.Wattage(approx..W)
50Hz
RGX7100 RGX7800
4600 5500
2550 3000
1850 2200
1150 1350
Table. 4-1
- 10 -
(
The smaller the motor, the
lower the efficiency .
60Hz
RGX7100
5000
2750
2000
1250
)
RGX7800
6000
3300
2400
1500