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TABLE 2-1
FUNCTION OF CONTRPLS AND INDICATORS
EQUIPMENT/ITEM
Control Unit
D0(b
CONTROL/INDICATOR
(Fig. 2-1)
Circuit Breaker
"ON-OFF" Control
Handle
"ON" Indicator
"START" Pushbutton
"STOP" Pushbutton
"MOTOR RUN"
Indicator
"NO.1 AUTO-NO.2
MODE"
Selector
Switch
"ALABM" Indicator
Manual Speedpot
2-4
FUNCTION
Controls application of three
phase, a-c power input to
drive system.
Provides an indication that the
"START" button has been pressed
and the "RUN" relay has energized
and there are no "faults
ll
in the
system.
Applies ll5VAC to the "RUN" relay
coil and power "ON" indicator.
Interrupts l15VAC to the "RUN"
relay coil which causes the power
"ON" light to extinguish, and also
connects the regulator input signal
to common, causing the motor to
stop.
Provides a visual indication of
motor run voltage; brilliance
will increase as the voltage or
motor speed increases.
In Position No. 1 the variable
speed motor may be operated in
manual.
In the auto position
the drive system operates as a
function of sensor reference.
In the No. 2 Position the con-
stant speed motor may be operated
at rated speed for emergency
operation.
With the application of external
l15VAC to the alarm circuit, this
indicator will illuminate when-
ever there is a fault due to a
problem or malfunction in the
system.
With mode selector switch in No. 1
Position, provides a means of set-
ting in a constant speed command
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