load dc ammeter (1) should be ap-
required. Refer to manufacturer's
proximately 25-amperes.
l i t e r a t u r e o r pertinent
publi-
(c) Place the load switches (12-C and
c a t i o n ( s ) covering the generator
12-D) in the "OFF" position and
regulator for this procedure. After
turn the rheostat (13) fully counter-
adjustments are made continue with
clockwise and stop the varidrive as-
tests in (3) below.
sembly by depressing the "STOP"
(3) Voltage regulator unit.
button (21-C) on the drive control
(a) Place the 40-ohm 30-ampere maxi-
(21).
mum rheo-reg switch (17) in the
(d) I f the ampere reading is not as
" R E G " position and connect a
specified in (b) above, adjustment
jumper cable across the upper and
of the current regulator unit will
lower points of the current regula-
be required. R e f e r to manufac-
tor unit (fig. 35).
turer's literature or pertinent pub-
(b) Start the varidrive assembly as
lication(s) covering the generator
prescribed in 114c(7) and (8) and
regulator for this procedure.
turn the speed control handle (22)
(e) A f t e r the adjustments are made,
until 3,000 rpm are indicated on the
(d) above, start the varidrive as-
tachometer indicator meter (3). The
s e m b l y , (a) above and place the
voltage reading on the dc voltmeter
50-25 fixed load switch (12-B) in
(4) should be approximately 28.2
the "ON" position to check the oper-
volts.
ation of the current regulator unit.
(c) Stop the varidrive assembly by de-
Use the 50-25 fixed load switch
pressing the "STOP" button (21-C)
(12-B) above or use the combina-
on the drive control (21) and re-
tion of the 0-25 0-12.5 load switch
move the jumper cable (a) above.
( 1 2 - D ) and 25-12.5 fixed load
(d) If the voltage reading is not as
switch (12-C) and turn the variable
specified in (b) above, adjustment
load 0-25 0-12.5 ampere rheostat
of the voltage regulator unit will be
(13) fully clockwise to obtain the
required. Refer to manufacturer's
required load. The points of the
l i t e r a t u r e o r pertinent
publi-
current regulator unit should con-
c a t i o n ( s ) covering the generator
tinue to close and open as the 50-25
regulator for this procedure. Refer
fixed load (12-B) is applied to and
to paragraph 102 for additional in-
disconnect from the circuit or, when
structions for setting the voltage
the rheostat (13) is turned clock-
regulator unit. Continue with tests
wise or counterclockwise.
in (4) below.
(f) Place all load switches (e) above, in
the "OFF" position and turn the
(4) Current regulator unit.
rheostat (13) fully counterclock-
(a) Place the starter test load disconnect
wise. Leave the varidrive assembly
switch (10) and the battery switch
running and continue with tests in
(20) in the "ON" position and start
(5) below.
the varidrive assembly as prescribed
in 114c(7) and (8). Turn the speed
(5) Overload circuit breaker device.
control handle (22) until 3,000 rpm
are indicated on the tachometer in-
selector switch (5) to the "150A
dicator meter (3).
(X3)" position.
(b) Hold the contact points of the ac-
(b) Place the 25-12.5 fixed load switch
tuating relay unit (figs. 33 or 35)
(12-C) and 0-25 0-12.5 load switch
closed using an insulated screw-
(12-D) in the "ON" position and
driver. Turn the speed control han-
turn the variable load 0-25 0-12.5
dle (22) counterclockwise, reducing
ampere rheostat (13) fully clock-
the rpm of the generator until the
wise. The ampere reading on the
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