Westerbeke 8.0KW-60Hz Service Manual page 76

BT GENERATOR TROUBLESHOOTING/SINGLE PHASE
Main Stator Windings .
)
1. Group #1. The resistance value is measured between the
lifted lead
#4 from
the insulated teni:linal below the trans·
fonner and lead
#6
lifted
from the AI!:; teni:linal block.
Lead
#5
should be lifted from the terminal block in order
to totally isolate the stator windings of group #1, .
2. Group
#2.
The resistance value is measuted between the
lifted lead #1 from the ins1llated terminal billow the trans· '
former and lead #3 lifted from the ACterminal blocl<;. In
order to totally isolate the stator windings of g.:pup
#2,
lead
#2
should be lifted from the teni:linal block:
NOTE: No continuity should be
jowul
between any of the
lifted stator leads and the case ground or between the
connections of the two groups.
3. Main Stator Auxiliary Windings. The resistance values
for these windings are measured between the black
, double lead connection lifted off the AC terminal of the
bridge rectifier (0) and the
red #3
lead lifted off the
VoltagelHertz connection bar.
NOTE: No continuity should be found between either of
' " these winding groups or to the generator case.
Compollnd Transformer
1. Group 1. Resistance value is measured between lifted
lead
#4
from the red insulated tenninal stod below the
transformer and iead #8 lifted off the AC terminal block.
2. Group 2. Resistance value is measured'between lifted '
lead #1 from the red insulated teni:linal stad below the
transformer and lead
#7
lifted off the AC terminal block'
NOTE: No continuity should be found between either of '
these lifted leads or to the. generator case/ground.
TWO
TWO ",'
1~~II~:-1r+.:::~
3. Transformer Auxiliary Windings. Resistance is
measured between the yellow wire lifted off the AC ter-
minal block of the bridge rectifier (0) with the selector
switch in the EI:.EC position and the #1 red lead lifted off
the
VoltageIHe~
connection bar. Off this same bar, lift
the
#2
and
#3
red leads that come from the aw\jliary
windings to totally isolate these windings. There should
be no continuity found from either of these, connections .
ta the case/ground or to either of the transformer groups.
Selector Switch (6 Stud BT only)
This switCh is is normally set in the COMP position. If an
optional AV'R is installed, the switchis toggled ki the BLEC
position ..
NOTE: With the selector. switch
i1) ELEC position the exciter
'stator windings are divided, one group.is. exCited through the,
bridge rectifier and the other group through the A.1T.R.
Bridge Rectifier Wiring .
The illustration below shows the color coded wires at the two
AC terminsls and the cOlor coded wires at the
(+)
and (-) DC
tenninals.
NOTE: When removing or reinstalling connections. maintain
correct polarity connection on the
(+)
and (-) DC tenninals.
" illii.TAGE/iiERTZ
CONNECTION BAR
BLACK
(TO BRIDIIE
RElm~ER) t~
AVRPLUG
REO '
, (TO HERtz BAR)
BLACK
SELECTOR SWITCH
(TO SELECTOR SWITCH)
(TO SELECTOR SWITCH) .
Engines & Generators
70
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