Operator`s manual
GENERAL INFORMATION AND CARE OF THE GENERATOR
Use
of
Electric
Motors
The power required
to
start an electric motor is considerably more than is required
to
keep it running after it
is
started. Some motors require much more current
to
start than others. Split-phase (AC) motors require
more current
to
start. under similar circumstances, than otherlypes. They are commonly used on easy-start-
ing loads, such as washing
or
where loads are applied after the motor
is
started, such
as
small
power tools. Because
Ihey
require
510
7 limes as much current
10
start as
to
run, their use should be avoided,
whenever possible, if the electric
motor
is
to
be driven by a small generator. Capacitor and repulsion-induc-
tion motors require from 2
to
4 times as much current to slart as 10 run. The curren! required
10
start any
molor
varies with the load connected
to
it. An eleclric motor connected
to
an air compressor, for example,
will
require more current than a motor
to
which no load is connected.
In
general, the curren! required
to
start I 15-Volt motors connected
to
medium starting loads will be ap-
proximately as follows:
MOTOR AMPS
FOR
AMPS FOR
SIZE
RUNNING STARTING
(HP)
(Amperes) (Amperes)
1/6
3.2
6.4
to
22.4ยท
1/4 4.6
9.2
to
32.2*
1/3 5.2
10.4
to
72.8*
1/2 7.2
14.4
to
29.2
3/4
10.2
20.4
to
40.8
1
13
26
to
52
* Note that in the above leble the maximum "Amps for Starting" is more for some small motors
than
for larger ones. The reason for this
is
that the hardest starting types (split-phase) are not
made
in
larger sizes.
Because the
heavy surge of current needed for starting motors
is
required for only an instant, the generator
will not be damaged if it cen bring the motor
up
to speed
in
a few seconds. If difficulty
is
experienced in start-
ing motors,
tum
off all other electrical loads and,
IT
possible, reduce the load 011 the electric motor.
Required
Operating
Speed
Although individual
units may vary slightly, the normal voltage and frequency
of
lypicaI60-(50-)Hertz engine-
driven generators described in this manual are approximately as follows: run first with no load applied, then
at
half the capacity, and finally loaded to its full capacity as indicated on the generator's data
piate.
See
the rpm/Hertz/frequency chart on the next page.
Weslerbeke
Generators