Installation manual
BT
GENERATOR
SINGLE
PHASE
OPTIONAL
AUTOMATIC
VOLTAGE
REGULATOR
(AVR)
BT
6
STUD
MODELS
ONLY
An
optional solid-state voltage regulator (board
#3441
0)
is
available
for use 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 transformer regulator
to
regulate
the
generator's volt-
age
output.
In the ELEC mode, the regulator provides
excitation
to
the
group 1 exciter windings,
and
the
trans-
former provides excitation to
the
group 2 exciter
windings.
Installation
1.
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.
3.
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
this
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 NO-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
±5
per cent
from
NO-Load
to
FULL-Load.
NOTE:
Do
not
use
the
regulator
to
force
NO-Load
voltage
down.
Use
the
compound transformer for
this
function.
Using
the
regulator
to
perform
this
causes
the
regulator
to
use
more
exciter
circuit
power.
This
leaves
less
exciter circuit power
for
loaded
conditions.
Switching
Shore
Power
to
Generator
Power
A
CAUTION:
Heavy
motor
leads
should
be
shut
off
before
switching
shore
power
to
generator
power
or
vlt:B-versa
because
voltage
surges
Induced
by
switch·
lng
with
heavy
AC
loads
on
the
VBSSBI
being
operated
may
cause
damage
to
the
exciter
circuit
components
In
the
generator.
43
BT
GENERATOR
TROUBLESHOOTING
CHART
NOTE:
WESTERBEKE
recommends
that
the
following generator tests
and adjustments
be
performed
by
a qualified
technician.
LOW
VOLTAGE
60-100
VOLTS
AC
COMPONENT CHECKS:
F
SELECTOR
SWITCH
(6 Stud Models)
8
ROTOR
COMPONENTS
82.
EXCITER
ROTOR
DIODES
83.
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
8 4
POSt
RESISTOR
B 2
DIODES
(4-6
OPEN/SHORTED)
D
1.+2
COMPOUND
TRANSFORMER
WINDING
8 3
ROTOR
FIELD
WINDING
RESIDUAL
VOLTAGE
EXCITER
CIRCUIT
FAULTY
COMPONENT CHECKS:
A 1-1+2
EXCITER
STATOR
WINDING(S)
G
BRIDGE
RECTIFIER
D 3
TRANSFORMER
AUX.
WINDING
C 3
MAIN
STATOR
AUX.
WINDING
F
SELECTOR
SWITCH
CIRCUIT CONNECTIONS
(from
the
Transformer
Aux.
winding
to
the
connections
on
the
Bridge
Rectifier)