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 TM 55-1905-223-10
Table 2-1. Description of Operator's Controls and Indicators - CONT
Key
Control or Indicator
Function
Main Switchboard (FIGURE 2-28) - Continued
28
AUTO
Controls automatic or manual exciter operation.
OFF
MANUAL
29
Selects A-B, B-C, C-A, or BUS A-B phase of
SWITCH
generator No. 1 to be displayed on AC voltmeter.
30
EMER 120V LIGHTING
Tests amber lights of three phases of emergency
GROUND DETECTION
120V lighting system.
SWITCH
31
EMER 120V LIGHTING
Indicates ground fault conditions on any one of
GROUND DETECTION
three phases of emergency lighting system
(amber).
32
GENERATOR 1
Controls speed of diesel engine driving generator
SPEED CONTROL
No. 1.
33
GENERATOR 1
Indicates frequency of generator No. 1.
FREQUENCY METER
34
SHORE POWER
Indicates voltage of phase selector switch of
shore power.
35
480V SHORE POWER
Indicates 480V shore power is available (blue).
AVAILABLE
SP1
36
SHORE POWER
Indicates amperage of shore power phase selector
switch.
37
SHORE POWER
Indicates phase sequence of shore power.
PHASE METER
38
Selects one of three phases of shore power
SWITCH
displayed on AC ammeter.
39
240V SHORE POWER
Protects 240V shore power circuit from amperage
BREAKER
overload.
(BYPASS)
PO405A
225AT
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