BT
GENERATOR
SINGLE
PHASE
OPTIONAL
AUTOMATIC
VOLTAGE
REGULATOR
(AVR)
BT
6
STUD
MODELS
ONLY
An
optional solid-state voltage regulator (board
#34410)
ig
nvail!tble
for
us~
with
the
BT series generators.
When
installed,
and
the regulation switch is moved to
the
ELEC
position,
the regulator works together with the
standard
com-
pound
transfonner regulator to regulate
the
generator's volt-
age
output.
In the ELEC mode, the regulator provides
excitation
to
the
groupl
exciter windings,
and
the
trans-
fanner provides excitation to the group 2 exciter
windings.
Installation
l.
The
regulator
is
mounted using existing tapped
holes
in
the
generator's
case.
Use
two
(2)
M4;
0
7mm
screws,
each
15mm
long,
with lock washers
to
mount
the
regula-
tor
board.
2.
Connect
the
6·prong
generator
plug
to
the
receptacle
on
the regulator
board.
NOTE:
The
plug
is
keyed
to
engage
the
regulator
.receptacle
in
one
direction.
Check
this
and insert it
correctly.
~.
Before moving the selector switch to the
ELEC
position,
the
NO-Load
voltage
produced
by the generator
when
in
the
COMP
position
will
have
to
be adjusted.
The
NO·
Load
voltage
should
be
adjusted
down
between
114-
118
volts
(60Hz)
or
224
-
228
volts
(50Hz)
following
the
procedures
as
explained
earlier
in
tllis
manual.
4.
With
the
generators.
no
load voltage properly adjusted,·
move
the
selection
switch
into the
ELEC
position.
Adjust
the
regulator
board
potentiometer to set
NQ..Load
voltage
at
120-
122
volts
at
61.5- 62.0 Hertz
(230-
234 volts at
51.5-
52~0
Hertz). The regulator board
is
operating in
par-
allel
with
the
compound
transformer and
should
maintain
voltage
output within
;t5
per cent from NO-Load
to
FULL-Load.
NOTE:
Do
not
uuc
the
regulator
to
force NO-wad
voltage
dawn.
Use
the
compound
transformer for
this
jUnction.
Using
the
regulator
to
perform
this causes
the
regulatorto
use
more
exciter
circuit
power.
This
leaves
less
exciter
circuit
power
for
loadEd
conditions.
SwitGhing
Shore
Power
to
Generator
Power
A
CAUTION:
Heavy
motor
leads
should
be
shut
off
before
switching
shore
power
to
generator
power
or
vice-versa
because
voltage
surges
induced
by
switch-
ing
with
heavy
AC
loads
on
the
vessel
being
operated
may
cause
ctamage
to
the
exciter
circuit
components
in
the
generator.
BT
GENERATOR
TROUBLESHOOTING
CHART
.
NOTE:
WESTERBEKE
recommends
that
the
following
ge11erator
tests
and
adjustments
be
performed
by
a
qualified
tecfmician.
LOW VOLTAGE
60~
100
VOLTS
AC
COMPONENT
CHECKS:
.
F
SELECTOR
SWITCH
(6
Stud
Mpdels).
B
ROTOR
COMPONENTS
82.
EXCITER
ROTOR
DIODES
B3.
ROTOR
FIELD
WINDING
81.
EXCITER
ROTOR
WINDING(S)
a,b,c.
A ·1·1+2 ExCITER
STATOR
WINDING(S).
NO
AC
VOLTAGE
OUTPUT
MAIN
STATOR,
ROTOR
COMPONENTS,
TRANSFORMER
COMPONENT
CHECKS:
C 1+2
MAIN
STATOR
WINDING
B 4
POSI
RESISTOR
· B 2
DIQDES
(4-6
OPEN/SHORTED)
D
1+2
COMPOUND
TRANSFORMER
WINDING
B. 3
ROTOR
FIELD
WINDING
RESiDUAL
VOLTAGE
EXCITER
CIRCUIT
FAULTY
COMPONENT CHECKS:
A 1-1+2
EXCITER
STATORWINDING(S)
G
BRIDGE
RECTIFIER·
·
D 3
TRANSFORMER
AUX.
WINDING
C 3
MAIN
STATOR
AUX.
WINDING
F.
SELECTOR
SWITCH
CIRCUIT CONNECTIONS
(from
the
Translorrner
Aux.
winding
to
the
connections
on
the
Bridge
Rectifier)
engines
& Generators
38
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