Robin LG072 Service Manual page 29

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
-