Specifications
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)
ยท120/60
VOLT
CONFIGURATION
Engines & Generators
44