Westerbeke BCG4.0KW Operator's Manual page 45

Testing the Batlery Charging CirclIil
1. AC Stator Winding,' O. 14 Ohms
Lift the two AC leads off the bridge rectifier and measure with an ohmmeter the resistance between these
two leads 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
+
BRIDGE
RECTifIER
DC
I.e.
INTEGRAL
CONTROLLER
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 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 Ohmmeter's scale on RX1 (
+
DC) and
set the needle to zero.
B. 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 connect the negative (-) lead to point #4.
Touch points #1, #2, and #3. The needle
should deflect, indicating a passage of current
Westerbeke Generators
POlnl
~2
POint #1
42
POint #5
(Rectifier Mounting Hole)