(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)
(Efficiency)
=
(Power consumption)
Efficiencies of some electrical appliances are as follows:
Single-phase motor
- -
*
-
.
-
*
- -
*
-
-
0.6
to
0.75
'
The smaller the motor, the;;
'i
lower the efficiency.
i
Fluorescent lamp . .
.
. . . . . . . . .
.
. .
.
.
. .
0.7
to
0.8
Example
1
:
Example 2:
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
571%'
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 1OOOWcapacity
can light nine to fourteen
40W
fluorescent lamps.
Generally speaking, a 400W motor means that its work load is
400W.
Efficiency of this
motor is
0.7
and power consumption-will be 400
+
0.7=
570W.
When this motor is used for
a motor-driven tool, the capacity of the generator should be multipled by
1.2
to 3 and 570W
as explained in the
Item(3).
MODEL
i
RGX1810
RGX3510
:
RGX5510
RGX2410
I
I
Frequency
'
50Hz 60HZ
i
50HZ 60Hz
50Hz
;
60Hz 50Hz
!
60Hz
i
lncandesent lamp,
I
heater, etc.
I
'
1300W 1500W
I
1700W 2000W
I
2500W
I
3000W
i
4400W 4800W
i
Fluorescent
laq.
Pvlo3r-
driven
rw1,
geserai-
purpose
IYCtOi,
etc.
I I
I
I
i
I
I
Mercury lamp, etc.
approx. approx.
:
approx.
approx.
'
approx.
approx.
approx. approx.
I
400W
I
400W
I
400W
I
800W
1
800W
I
1600W
I
1600W
I
16OOW
I
Wate:
pump.
Tzble
7-1
350W
I
400W
I
500W 600W
I
700W
I
lOOOw
I
1100W 300W
coqressor. etc.
approx. approx.
I
approx.
'
approx.
I
approx. approx. approx.
approx.
-
38
-
