Westerbeke 7.0KW BCG-60HERTZ Operator's Manual page 42

Testing the Battery Charging Circuit
1. AC Stator Winding: O.
14
Ohm
Lift the two AC leads off the bridge rectifier and measure with an ohmmeter the resistance between these
two leads which should measure 0.14 ohm. No continuity should exist between these two leads and the
ground.
2. Bridge Rectifier
Normal AC voltage running to the rectifier (while the engine is operating at 1800 rpm) is measured across
the two AC connections on the bridge rectifier. (See the illustration below.)
AC voltage running to the bridge rectifier (approximate):
No-load off the generator 16.0 volts AC
Full-load off the generator 17.5 volts AC
Normal DC voltage running out of the rectifier (in volts DC) is measured across the two DC connections
of the bridge rectifier; that is.
+
and
~
.
DC
__
-----1A~C_r---,~+~----------__I.----.CHARG
At
-t>I-
BRIDGE
RECTIFIER
DC voltage running from the bridge rectifier (approximate):
No-load off the generator 17.0 volts DC
Full-load off the generator 18.5 volts DC
3. Testing the Bridge Rectifier
A.
Set your ohmmeters scale on RX1 (+ DC) and
set the needle to zero.
a.Connect the (+) positive lead from the
ohmmeter to point #4. Taking the ohmmeter's
negative (-) lead, momentarily touch points #1,
#2, #3, and #5. The ohmmeter should register
no deflection for any of the points touched.
C. Remove the positive (
+ )
lead from point #4 and
connectthe negative (-) lead to point #4. Touch
points #1, #2, and #3. The needle should
deflect, indicating a passage of current through
the diodes located internally at these points.
Westerbeke Generators
36
I.C.
INTEGRAL
CONTROLLER
-
"=-
Point
15
(Reclit1er )[ountl;oz Hole)
Point
13