the generator. (Refer to paragraph 63 for fur-
ther instructions for connecting these rheo-
nated as FIELD `CURRENT INCREASE)
stats.) The "REG" position of this switch is
The 40-ohm field current rheostat (52), lo-
used to connect a generator regulator or gen-
cated, near the bottom left hand end of the main
erator control box in the circuit with the gen-
control panel, is a 30-ampere (maximum)
erator undergoing test. In this position either
0.2-ampere (minimum, 40-ohm, taper wound
of these items will control the ouput of the
rheostat. It is used with a generator having a
generator. The center position on the switch
field-current-draw above 5 amperes and controls
is open circuit and will disconnect the switch
the output of the generator undergoing test by
from the circuitry of the test stand, and should
placing a variable resistance on its field. When
be placed in this position after tests are com-
it is connected to a generator field it substitutes
pleted.
for the control which a generator regulator or
generator control box would have on the output
of the generator, therefore, no generator regu-
(Designated as 250-OHMS 5 AMPS MAX
lator or generator control box need be used in
ON-OFF)
the test set-up. The rheostat is turned in the
The 250-ohm 5-ampere maximum switch
clockwise rotated to decrease the resistance on
(54), located near the center bottom of the main
the generator field which increases the genera-
control panel, is a 2-position (on-off), single-
tor output and turned in the counterclockwise
pole, single-throw, 25-ampere, 30-volt dc,
rotation to increase the resistance on the gen-
toggle switch. The switch is used to connect
erator field which decreases the generator out-
the 250-ohms field current rheostat (55) in the
put. The rheostat is connected in the system
circuitry of the test stand by placing it in the
undergoing test by placing the switch (53) in
"ON" position.
the RHEO position (par. 62).
Note. Always place the 250-ohms 5-ampere maxi-
Note. The generator regulator or generator control
mum switch (54) above in the "OFF" position when
box do not have to be removed from the circuit if already
not in use.
connected in the test set-up. When the switch (53) is
placed in the "RHEO" position this will disconnect
these items from the circuit and connect. the rheostat
nated as FIELD CURRENT INCREASE)
(52) which will substitute for their function in con-
trolling the generator output.
The 250-ohm field current rheostat (55), lo-
Note. Always place the 250-ohms 5-ampere maxi-
cated near the center bottom of the main control
mum switch (54) in the "OFF" position when using the
panel, is a 5-ampere (maximum), 0.1-ampere
40-ohms field current rheostat (52) above, also, this
(minimum), 250-ohm, taper wound rheostat.
rheostat will have no control on the output of a third
If is used with a generator having a field-cur-
brush generator which is self-regulated for the gener-
rent-draw below 5 amperes and controls the
ator output. When testing this type generator, place
output of the generator undergoing test by
the switch (53) in the center (OFF) position (par. 62).
placing a variable resistance on its field. When
it is connected to a generator field it substitutes
(Designated as 40-OHMS 30 AMPS MAX
for the control which a generator regulator or
RHEO REG)
generator control box would have on the output
of the generator, therefore, no generator regu-
The field current rheostat-regulator switch
lator or generator control box need be used in
(53), located near the center bottom of the main
the test set-up (see note (par. 61) relative to
control panel, is a 3-position (on-off-on), single-
when a generator regulator or generator control
pole, double-throw, 20-ampere, 30-volt dc,
box is used in the test set-up). The rheostat is
toggle switch. The switch is used to conneet
turned in the clockwise rotation to decrease the
either the 40-ohm field current rheostat (52),
resistance on the generator field which increases
or the 250-ohm field current rheostat (55) in
the generator output and turned in the counter-
series with the field of the generator undergoing
clockwise rotation to increase the resistance on
test. To connect the rheostats to the field the
the generator field which decreases the genera-
switch is placed in the "RHEO" position which
tor output. The rheostat is connected in the
permits the rheostats to control the' output of
