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Westerbeke 20.0KW sbeg Specifications Page 37

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Page view 36
GENERATOR
INFORMATION
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
them
than
others.
Split-phase
(AC)
motors
require
more
current
to
start,
under
slinilar circumstances,
Ulan
oUler
types.
They
are
com-
monly
used
on
easy-starting
loads,
such
as
washing
machines,
or
where loads are
applied
after
the motor
is
started,
such
as
small power
tools.
Because
they
require 5
to
7
times
as
much
current
to
start
as
to
run,
their
use
should
be
avoided,
whenever possible,
if
the electric motor
is
to
be dri-
ven
by
a
small
generator. Capacitor
and
repulsion-induction
motors
require
from
2
to
4 times
as
much
current to start
as
to
run.
The current required
to
start
any
motor
varies
with
Ule
load connected
to
it.
An
electric
motor
connected
to
an
air .
compressor,
for
example,
will
require
more
current
than
a
motor
to
which
no
load
is
connected.
ill
genera!,
the
current
required
to
start
JI5-
Volt
motors
connected
to
medium
starting
loads
will
be
approximately
as
follows:
MOTOR
SIZE
AMPS
FOR
AMPS
FOR
(HP)
RUNNING
STARTING
(AMPERES)
(AMPERES)
1/S
3.2
6.4
to
22.4"
1/4
4.S
9.2
to
32.2"
1/3
5.2
10.4
to
72.8"
112
7.2
14.4
to
29.2"
3/4
10.2
20.4
to
40.8"
1
13
26to
52
"NOTE:
In the above table the maxil7lwn
Amps
for Starting is
nwre
for
some snzalll1wtors than
for
larger ones. The reason
for
this is that the hardest sta/ting types (split-phase) are Iwt
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 can bring the motor
llP
to
speed in a
few
seconds.
If
difficulty
is
experienced
in
starting motors, turn
off all other electrical loads
and,
if
possible,
reduce the load
on
the
electric
motor.
REQUIRED
OPERATING
SPEED
Run
the
generator first
with
no
load
applied,
then
at half the
generators capacity, and
finally
loaded
to
its
full
capacity
as
indicted
on
the
generators data
plate.
The output voltage
should be checked periodically
to
ensure proper operation of
the generating plant and
Ule
appliances
it
supplies.
If
an
AC
voltmeter or ampmeter
is
not
installed
to
monitor voltage
and
load, check it with a portable meter
and
amp
probe.
'
NOTE:
When the area in which the generator is installed
contains
AC
equipment
of
120 volts only, it is recommended
that the generators
AC
tenninal block be configured to
provide,one)20
volt
AC
lwr.leg
for
the distribution panel.
This
will
ensure
good
nrotor
sta11ing
response
from
the
genera/OJ:
Generator
Maintenance
• Maintaining
reasonable
cleanliness
is
impOItant.
Connections
of
terminal
boards
and
rectifiers
may
become
corroded,
and
insulation
surfaces
may
start
conducting
if
salts,
dust,
engine
exhaust,
carbon,
etc.
are
allowed
to
build
up.
Clogged
ventilation
openings
may
cause
excessive
heating
and
reduced
life of
windings.
• For
unusually
severe
conditions,
thin
rust-inhibiting
petroleum-base
coatings,
should
be
sprayed
or
brushed
over
all
surfaces
to
reduce
rusting
and
corrosion.
•
ill
addition
to
periodic
cleaning,
the
generator
should
be
inspected
for
tighlness
of
all
connections,
evidence
of
overheated
terminals
and
loose or
damaged
wires.
• The drive
discs
on
single
bearing
generators
should
be
checked
periodically
if possiblefor
tighlness
of
screws
and for
any
evidence
of incipient
cracking
failure.
Discs
should
not
be
allowed
to
become
rusty
because
rust
may
accelerate
cracking.
The
bolts
which
fasten
the
drive
disc
to
the generator shaft
must
be
hardened
steel
SAE
grade
8,
identified
by
6
radial
marks,
one
at
each
of
the
6
comers of
the
head
..
• The rear
armature
bearing
is
lubricated
and
sealed;
no
maintenance
is
required.
However,
if
the
bearing
becomes
noisy or
rough-sounding,
have it
replaced.
• Examine
bearing
at
periodic
intervals.
No
side
movement
of
shaft
should
be
detected
when
force
is
applied.If
side
motion
is
detectable,
inspect
the
bearing
and
shaft
for
wear.
Repair
must
be
made
quickly
or
major
components
will
rub
and
cause
major
damage
to
generator.
CARBON
MONOXIDE
DETECTOR
WESTERBEKE
recommends
mounting
a
carbon
monoxide
detector in
the
living
quarters.
Carbon Monoxide,
even
in
small amounts
is
deadly.
The
presence of
carbon
monoxide
indicates
an
exhaust
leak
from
the
engine
or
generator
or
from
the
exhaust
elbow/exhaust
hose,
or
that
fumes
from
a
nearby
generator
are
leaking
in
your
area.
If carbon
monoxide
is
present,
venulate
the
area
with
clean
air
and correct
the
problem
immediately!
~
WESTERBEKE
Engines
&
Generators
25
Page view 36
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