(1) through (6) except mount a 25-ampere
nent publication (s) covering the
4-unit generator regulator, b above, in place of
generator regulator for this pro-
a 25-ampere 3-unit generator regulator (par.
cedure.
114b).
(e) S t a r t the varidrive assembly and
Note. Perform the test procedures for the control
check the sealing voltage (voltage
units as an assembly, first, paragraph 114d, before
at which the armature of the relay
testing the individual control units, d below.
seals (touches) against the core of
d. Test Procedures for Control Units.
the relay (figs. 33 or 35) by repeat-
ing the procedures in (c) above un-
(1) Circuit Breaker Relay Unit (Cut-out
til the points of the circuit breaker
Relay).
relay unit (cut-out relay) (figs. 33
(a) Remove the cover from the genera-
or 35) close, then continue to turn
tor regulator (fig. 31) as shown in
the 40-ohm field current rheostat
(16) clockwise until the armature
ber 38425 (fig. 74) in the top of the
seals to the core. Satisfactory seal-
negative test indicator binding post
ing range is 2 to 5 volts above clos-
(24) and connect the other end to
ing voltage specified in (c) above.
t h e ground (GND) binding post
( f ) Release the contact points of the
(10-E, fig. 15). Plug another test
actuating relay unit, (c) above, and
lead number 38425 in the top of the
turn the 40-ohm field current rheo-
positive test indicator binding post
stat (16) fully counterclockwise,
(23) and clip the other end on the
Stop the varidrive assembly and
a r m a t u r e (upper points (battery
adjust the armature of the circuit
side) ) of the circuit breaker relay
breaker relay (figs. 33 or 35), if
unit (cut-out relay) (figs. 33 and
necessary, following instruction in
35).
manufacturer's literature or per-
(b) Start the varidrive assembly and
tinent publication (s) covering the
check the rotation of the generator
generator regulator for this proce-
as prescribed in paragraph 114c(7)
dure. Continue with tests in (2)
and (8). Turn the control handle
below.
(22) slowly clockwise until 1,700
(2) Actuating relay unit.
rpm are indicated on the tachom-
(a) Start the varidrive assembly as pre-
eter meter (3).
scribed in 114c(7) and (8) and turn
(c) Hold the contact points of the ac-
the 40-ohm field current rheostat
tuating relay unit (fig. 33 or 35)
(16) clockwise until the points of
closed, using an insulated screw-
the actuating relay unit close (figs.
driver. Turn the 40-ohm field cur-
33 or 35) which will be indicated
rent rheostat (16 ) clockwise slowly,
when the test indicator lamp (25)
until the points of the circuit breaker
lights-up. Observe the voltage read-
relay unit (cut-out relay) close (fig.
ing on the dc voltmeter (4) when
33 or 35) which will be indicated
the points close. The reading should
when the test indicator lamp (25)
be approximately 26 volts.
lights up. Observe the voltage read-
ing on the dc voltmeter (4) when the
(b) Turn the 40-ohm field current rheo-
points close. The reading should
stat (16) fully counterclockwise and
be between 14 and 17 volts.
stop the varidrive assembly by de-
(d) If the voltage reading is not as spec-
pressing the "STOP" button (21-C)
ified in (c) above, adjustment of
on the drive control (21) and remove
the circuit breaker relay unit (cut-
the test leads (1) (a) above.
out relay) will be required. Stop
(c) If the voltage reading is not as
the varidrive assembly and refer to
specified in (a) above, adjustment
manufacturer's literature or perti-
of the actuating relay unit will be
