Westerbeke 15.0KW -60Hz EDT Manual del operador Pagina 60

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BT GENERATOR
This
is
a brushless self-excited which lorce
01
the
Anrlln"
to
produce
AC
The copper and laminated iron
in
the exciter stator are
""<nnndhl,,
lor
the selii-e)(citing
leature
of this The field causes
an
AC
volta{J8
to
be Induced into the related
exciter rotor windings rolationo Diodes located
In
the exciter rotor this
DC
and supp-
ly
it to the of the
lieldo
This creates all field which rotales the
windings of the main stator
o
an
AC
which is to a
loado
A transformer
is
connected
in
to
the
AC
of the main statoL
An
AC
is
in
the of the
transformer
and main stator and
in
tum, 10 a fuil-wave rectifier, The rectifier a
DC
to
further
eXCITe
the exciter stator 10 a rated
AC
out-
put
An
optional soUd-slate voltage
is
available to work
in
tandem with the transformer
10
produce a more stable
AC
output
(see
the top of page
No-load
Voltage Adjustment
A voltage adjustment
is
made with the compound transformer governing generator "'!JWdUU'
1 0 The selector switch must be
in
the COMP positicno
20
Operate the generator and a moderate load momentarily; then remove the
loado
Note the voltage
from the
generator's 120-Volt leg(s)
(110
Volls at
50
The no-load
vOlta£16
should be be-
tween
121
-
123
Volls
at
61,5 -
62
Hertz
(111
-
113
Volts at 51,5 -
52
NOTE: The No-Load voltage should be adjusted
to
the voltage produced
when: the generator
is
started, a load
is
applied
to
excite the lransforl1neL and
then removed 0 The voltage produced the alter this load is removed
Is
the no-load voltage,
30
To raise
or
lower
lhe
voltage, non-conductive shims of varying thickness are inselted
or
removed from
under the laminated steel bar thai
is
situated on top
ollhe
compound transformer The material used
lor
shimming should not sofien
at
temperatures
in
the
176
0
F (80'
C)
rangeo
A small reduction
in
the no-load
voltage
(1
to
3 Volts) sometimes can
be
accomplished by gently tapping the of the laminated steel
bar
to
reduce the air gap between the existing shims and the transformer
coreo
See
the next page
lor
an illustration of the generator's
AC
distribution
bOK
Weslerbeke Generators
56
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