Measuring Resistance; Voltage Connection Terminal - Westerbeke 7.6 kw EDT Operator's Manual

7.6KW 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 terminal below the trans-
former 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 tennina! below the trans-
fanner 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 tennina! block
Main Sialor Windings 20 - 22 Ohms
3. Maiu StaJor
Auxiliary
WuuIings are measured between
the double leads on the AC terminal of the bridge recti-
fier, unplugged from the rectifier and the double lead cen-
tral
prong connection of the regulator plug.
Main Sialor Auxiliary Windings 1.5 -1.B Ohms
NOTE:
No continuity should be found between either of
these winding groups or to the generator case.
Compound Transformer
Gronp 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
Gronp 2 measured between Lead #8 at the AC terminal
block and Lead #4 at the junction block. Lift both leads
along with lead #7 at the terminal block.
Compound Transformer Windings 0.019 - 0.021 Ohms
12 STUD
TERMINAL BLOCK
COMPOUND
A three connection voltage connection terminal was added to
this circuit located just below the AC terminal block at the
lower lefL Isolate the three numbered #1, #2, and #3 red and
white-striped wires coming onto each of the three terminals.
Lift the black and white-striped leads and the green and
white-striped leads off of their connections on the AC termi-
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 terminal block.
Transformer Auxiliary Windings 4.0 - 4.5 Ohms
VOLTAGE CONNECTION TERMINAL
The addition of the three connection terminal is for the
increase or decrease of full-load voltage output Should full-
load voltage faU 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-
ator up.
No-load voltage should be properly adjusted by shimming
the compound transfonner: 121 - 124 volts at 60.0 - 60.5
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 speed/hertz adjUSlJnent, see ENGINE
ADJUSTMENTS in this /1UJ}zuaL
VOLTAGE CONNECTION TERMINAL
LEADS
HIGH
CIRCUIT
BREAKER
DT SINGLE PHASE (12 STUD)
.120/60 VOLT CONFIGURATION
, . WESTERBEKE
Engines & Generators
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