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
Three-phase motor
..........
0.65
-
0.9
Fluorescent lamp
0.7
-
0.8
-
0'75
3
The smaller the capacity, the worse the efficiency,
and vice versa.
...........
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,
multiply 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
9
-
14 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, th2 capa-
city of the generator should be multipled by 1.2 to
3
and
570
W
as explained in the Item
3.
Model
Frequency
hot plate, etc.
Incandescent lamp,
Fluorescent lamp,
mercury lamp, etc.
Motor-driven tool,
general-purpose
motor. etc.
Water pump,
compressor, etc.
LG072
LG102
I
LGK102
I
LGK152
,
LG301D*
I
LG301DC
LG 152
I
LG201 LG301
I
50HZ
60HZ
2500W
j
2900W
2000W
600W
1
700W
1
8OOW
j
lOOOW
,
1300W
!
1500W 1700W
60Hz
50Hz
60Hz
50HZ
I
60Hz
I
50Hz
I
60Hz
I
50Hz
about
I
about
about
.
about
about about
1
about
about
I
about
1
about
350W
I
400W
I
450W
,
60OW
I
850W
1
1 OOOW
,
1 lOOW
1
1300W
I
1650W 19OOW
I
about
i
about
I
about
i
about about about about about
I
about
I
about
350W
;
400W
I
500W
I
600W
I
750W
I
850W
;
looow
;
1200w
I
1500
I
1700W
about
'
about
i
about
about.
about about
'
about about
1
about
about
150W
I
18OW
I
230W
I
250W
I
350W
I
400
,
500W
I
600W
:
750W
I
850W
*The load that ca be connected to one 11011
20
V
receptacle
of
the dual voltage type
is
up to only
one half
of
the atove wattages.
Table
7-
1
-
27
-
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