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Page Title:
BASE SETTING FOR UMC SWITCHES AND CONTROLS-continued |
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 TM 9-2920-257-30&P
INT GND
i . Generator
field
NEG GND
j . Polarity
reversing
switch
OFF
k. Field
circuit
OFF
l . Fine control switch (0-5)
COUNTERCLOCKWISE
m. F i e l d c u r r e n t i n c r e a s e ( 0 - S )
COUNTERCLOCKWISE
Field circuit (rheostat 0-30)
n
OFF
Battery
circuit
selector
o
DOWN (Press to
Circuit
breakers
P
ensure CBS are down)
OFF
R e g u l a t o r c h e c k , f i x e d resistance method
q
OFF
r . D C variable volts
OFF
Load selection (all switches)
s
OFF
Master load disconnect
t
COUNTERCLOCKWISE
u . Variable load increase
COUNTERCLOCKWISE
v . V o l t a g e adjusting increase (VAR)
OFF
Field
shorting
(spring-loaded)
w
Approximately
three
Starter rheostat
x
turns
COUNTERCLOCKWISE
from fully CLOCKWISE
OFF
Starter test
y
OFF
Equalizer coil test
z
OFF
aa. A u x i l i a r y
start
OFF
ab. I g n i t i o n
switch
a c . Bus bars
I n place
(1) B+ and G+
I n place
(2) B- and G-
ad. D C variable power supply
COUNTERCLOCKWISE
0 - 3 2 VDC (front panel)
OFF
ae. C h a r g e t i m e c o n t r o l
COUNTERCLOCKWISE
a f . Battery charger variable load
OFF
ag. D - s e n s i n g s w i t c h
7 4 5 8 - 2 has D-sensing switch normally
(New UMC test stand no.
OFF.)
E-3
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