Table of Contents
Advertisement
(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 l a q . Pvlo3r-
driven
r w 1 ,
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
l O O O w
I
1100W
300W
c o q r e s s o r . etc.
approx.
approx.
I
approx.
'
approx.
I
approx.
approx.
approx.
approx.
-
38 -
Advertisement
Table of Contents
