Measuring Resistance; Voltage Connection Terminal - Westerbeke 5.0Kw BCDR Operator's Manual

7.8KW BT GENERATOR SINGLE PHASE
MEASURING RESISTANCE
Main Stator Windings
1. Group #1. The resistance value is measured between the
lifted lead
#4
from the insulated tenninal below the trans-
fonner and lead #6 lifted from the AC tenninal block. In
order to totally isolate the stator windings of group #1,
lead #5 should be lifted from the tenninal block.
2. Group #2.
The resistance value is measured between the
lifted lead #1 from the insulated tenninal below the trans-
fonner and lead #3 lifted from the AC tenninal block. In
order to totally isolate the stator windings of group #2,
lead #2 should be lifted from the tenninal block.
Main stator Windings 20 - 22 Ohms
3. Main Stator Auxiliary Wuulings are measured between
the double leads on the AC tenninal of the bridge recti-
fier, unplugged from the rectifier and the double lead cen-
tral prong connection of the regulator plug.
Main Stator Auxiliary Windings 1.5 - 1.8 Ohms
NOTE:
No continuity should be found between either of
these winding groups or to the generator case.
Compound Transformer
Group 1 measured between Lead #10 at the AC terminal
block and Lead #4 at the junction box. Lift both leads along
with lead
#9
at the terminal block.
Group 2 measured between Lead #8 at the AC tenninal
block and Lead
#4
at the junction block. Lift both leads
along with lead #7 at the tenninal block.
Compound Transformer Windings 0.019 - 0.021 Ohms
12 STUD
TERMINAL BLOCK
A three connection voltage connection tenninal was added to
this circuit located just below the AC tenninal block at the
lower left. Isolate the three numbered #1, #2, and #3 red and
white-striped wires coming onto each of the three tenninals.
Lift the black and white-striped leads and the green and
white-striped leads off of their connections on the AC tenni-
nal block. Measure the resistance value between the #1 red
lead lifted from the tenninal strip and the black and white
striped lead lifted from the AC tenninal block.
Transformer Auxiliary Windings 4.0 " 4.5 Ohms
VOLTAGE CONNECTION TERMINAL
The addition of the three connection tenninal is for the
increase or decrease of full-load voltage output. Should full-
load voltage fall below 108 volts, selecting a higher number
terminal strip lead to connect the lead (red or red and white)
will supply a higher AC voltage to the exciter circuit during
full-load conditions, bringing the output voltage of the gener-
atorup.
No-load voltage should be properly adjusted by shimming
the compound transfonner: 121 - 124 volts at 61.5 - 62.0
hertz. The above should not be used as a means of compen-
sating for incorrectly adjusting the generator's no-load volt-
age.
NOTE:
For engine speedlhertz
adjustment,
see ENGINE
ADJUSTMENI'S in this manuaL
VOLTAGE CONNECTION TERMINAL
LOW.
...-1"""
--."
...
-~-
REPOSmON ..-
LEADS
"'-~--
HIGH
CIRCUIT
BREAKER
BT SINGLE PHASE (12 STUD)
·120/60 VOLT CONFIGURATION
Engines & Generators
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