Quantcast SECTION XI. TESTING LEECE NEVILLE COMPANY 100-AMPERE GENERATOR (ALTERNATOR) (PULLEY OR DIRECT-DRIVEN)

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reverse current setting for the differ-
(8) H o l d the dc volts-millivolts momen-
e n t i a l and reverse current relay as-
tary-on switch (21, fig. 16) up to the
sembly (see
above for specifi-
" R E A D " position and turn the 40-
c a t i o n s for reverse current setting).
o h m field current rheostat (16) fur-
T u r n off the battery switch (20).
ther clockwise very slowly, until ap-
proximately 18 volts are indicated on
(11) C h a n g e the load dc ammeter range
t h e dc voltmeter (4). The needle of
selector switch (5) to the "150A
the dc volt-millivolts meter (4, fig. 16)
( X 3 ) " p o s i t i o n .  P l a c e one 100-50
should deflect to past "0" and to the
fixed-load switch (12-A) in the "ON"
left (negative) side of the dial to ap-
position (be sure the starter test load
proximately 450 millivolts and as the
disconnect switch (10) is in the "ON"
v o l t a g e reading on the dc voltmeter
position).
(4) is increased to approximately 25
(12) H o l d the dc volts-millivolts momen-
v o l t s , by turning the rheostat (16)
t a r y - o n switch (21, fig. 16) up to
f u r t h e r clockwise, the needle of the
"READ" position and note the milli-
dc volts-millivolts meter (4, fig. 16)
volts drop reading across the contacts.
should go back to "0" and to the right
The millivolts drop should be approx-
(positive) to approximately 100 milli-
imately 150 millivolts reading on the
volts.
dc volts-millivolts meter (4, fig. 16)
(9) Release the dc volts-millivolts momen-
a n d the reading on the load dc am-
tary-on switch (21, fig. 16). The
m e t e r (1) should be approximately
h i g h e s t dc millivolts reading on the
4 8 amperes. (Refer to manufactur-
dc volts-millivolts meter (4, fig. 16)
e r ' s and/or pertinent publication(s)
is the differential voltage (see
c o v e r i n g the generator control box).
above for specification for voltage
S t o p the varidrive assembly by de-
setting).
p r e s s i n g the stop button (21-C).
(10) T u r n the 40-ohm field current rheo-
(13) P l a c e the switches and controls in
stat (16) counterclockwise, very
slowly, to decrease the voltage read-
of the table.
i n d i c a t e d in column
ing on the dc voltmeter (4), observ-
Do not remove any cables, leads, or
i n g the load dc ammeter (1). The
g e n e r a t o r and continue with tests in
c u r r e n t reading on the meter should
p a r a g r a p h e below if the individual
increase, then indicate a reverse read-
control units of the generator control
ing, and then come back to "0" when
b o x require checking and/or reset-
t h e relay opens.  T h e maximum re-
t i n g adjustments.
v e r s e current reading attained is the
Note. The key numbers shown below in parentheses in this section refer to figure 47 except where otherwise
indicated.
TESTING LEECE NEVILLE COMPANY 100-AMPERE
Section Xl.
GENERATOR (ALTERNATOR) (PULLEY OR DIRECT-DRIVEN)
field. For detailed description refer to TM 9-
129. Description
7003. TM 9-2920-225-35. and TB 9-2300-
T h e Leece Neville Company 100-ampere
206-15.
g e n e r a t o r (alternator) (figs. 48, 50, or 52) is
130. 100-Ampere
Generator (Alternator)
u s e d in conjunction with the Leece Neville
Test (Leece Neville Com-
Performance
Company generator (alternator) regulator
pany, Pulley
or Direct Driven)
(par. 131).  The generator (alternator) is
test is performed to deter-
a. Purpose. T h i s
pulley-driven or direct-driven, fan cooled, non-
g e n e r a t o r (alternator) is
m i n e whether the
w a t e r p r o o f , and has an internally grounded

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