7.
RANGE
of
APPLICATIONS
Generally. the rated power of an electrical appliance often refers
to
the amount of work that can be done by it. The electric
power required for operating an electrical appliance is
not
necessarily equal
to
the amount of work that can be done by
it.
Electrical products generally have a label showing their rated voltage, frequency, and power consumption (input power). The
power consumption of an electrical products is the power necessary for using it. When using
a
generator for operating an
electrical product, however, the power fxtor and starting current must
also
be taken into consideration.
Determine the required capacity of your generator from the power required for operating electrical products that are classi-
fied as follows:
1.
2.
3.
4.
Incandescent lamps, hot plates, etc. with a power factor of
1
.O
Total power consumption must be equal to or less than the rated output
of
the generator.
Example:
A
generator with a rated output power of
1000
W
can light ten
100
W
lamps.
Fluorescent lamps, mercury lamps, etc. with
a
smaller power factor
Select a generator with a rated output equivalent to
1.2
to
2
times the power consumption of the load.
Example:
A
generator with a capacity
of
100
W
to 160
W
is necessary for lighting a
80
W
fluorescent lamp.
A
generator
with a rated output of
1000
W
can
light
6
to 10
40
W
fluorescent lamps.
NOTE: Wattage of the fluorescent lamp generally does not indicate the power consumption but indicates the ouwut of
the lamp. Therefore, if the fluorescent lamp has
no
special indication as to the power consumption or input power,
efficiency should be taken.into accounts as explained
in
Item
5
on
the followingpage.
Electric
tools,
etc. that are driven
by
a motor
Power
1
.Z
to
3
times the power consumption of a motor-driven tool is required for starting
so
select a generator with a
maximum output
1.3
to
3
times the power consumption
of
the load.
Example:
A
300
W
motor-driven drill requires a generator with a maximum output of
400
to
900
W
or more.
Water pumps, compressors, etc. that are driven
by
a
motor which
is
loaded at starting
3
to
5
times the power consumption of the load is necessary for starting
so
select a generator with a maximum output
3
to
5
times its power consumption.
Example:
A
water pump with a power consumption
of
400
W
requires a generator with a maximum output
of
1200
to
2000
W
or more.
NOTE
7:
Motor-driven products mentioned in
Items
3
and
4
required the aforementioned generator capacities
only
when starting their motors. Once their motors are started, the products consume only about
1.2
to
2
times their rated
power consumption
SO
that the excess po wer generated by the generator can be used for other electrical appliances.
NOTE
2:
Motor- driven products mentioned in Items
3
and
4
vary in their required motor starting power depending
on
the
kind
of motor and start-up load. If it
is
difficult to determine the optimum generator capacity, select
a
generator
with a larger capacity.
-
26
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