CONTROLS AND INSTRUMENTS.

TM 5-6115-465-12

TO 35C2-3-446-1

NAVFAC P-8-625-12

TM 06858B/06859D-12

toggle switch. It is placed in the single unit position

q. Reverse Power Indicator (16, figure 2-7).

for single unit operation and in the PARALLEL

The reverse power indicator is an indicator lamp

position for parallel operation.

with a red lens. It illuminates when reverse power

exceeds 20% and the reverse power protective de-

ab. Voltage Sensing Switch (27, figure 2-7).

vice actuates.

The voltage sensing switch is a double pole. two

position toggle switch. It permits either local or

r . Over Voltage Indicator (17, figure 2-7). The

remote monitoring of the voltage regulator circuit.

over voltage indicator is an indicator lamp with a

red lens. It illuminates when voltage exceeds 153

Panel Light Switch (28, figure 2-7). The

ac.

3 volts and remains for 180 milliseconds and the

panel light switch is a single pole toggle switch. It

over voltage protective device actuates.

controls the panel illumination lights.

s. Fault Indicator Fuse (18, figure 2-7). The

ad. Frequency Adjust Rheostat (29, figure 2-7).

fault indicator fuse is 1-1/4 x 1/4 inch, glass, 1

The frequency adjust rheostat increases or de-

amp, 250 volt fuse. It protects the fault indicator

creases the frequency output of the tactical precise

circuits from overload.

generator sets.

t. Test or Reset Switch (19, figure 2-7). The

NOTE

test or reset switch is a single pole, momentary on,

toggle switch. It permits testing of the fault indica-

tor lamps and resetting of fault indicator lights.

The frequency adjust rheostat is func-

tional on the precise generator sets

only.

u. DC Circuit Breaker (20, figure 2-7). The

dc circuit breaker is a push type circuit breaker.

ae. Circuit Breaker Switch (30, figure 2-7). The

It closes the 24 Vdc circuit from the battery to the

circuit breaker switch is a three position, momen-

controls. The DC circuit breaker is depressed

tary-on-momentary-off toggle switch. It opens and

(closed) during generator set operation.

closes the main load contactor. The circuit breaker

v. Manual Speed Control (21, figure 2-7). The

switch is in the center position during normal

operation.

manual speed control is a push-pull control. It con-

trols engine speed and thereby frequency output. A

vernier type adjustment allows finer control. This

af. Circuit Breaker Indicator (31, figure 2-7).

The circuit breaker indicator is a press-to-test

control is inoperable on precise models of the gen-

indicator light with a yellow lens. It illuminates

erator set.

when the main load contactor is closed.

w. Battle Short Switch (22, figure 2-7). The

battle short switch is a four pole on-off toggle

ag. Start-Run-Stop Switch (32, figure 2-7). The

switch. It is protected by a plastic guard. It per-

start-run-stop switch is a three position toggle

mits emergency operation by bypassing the protec-

switch, used to start and stop the generator set.

tive devices circuits (with the exception of the over-

speed and short circuit). The battle short switch

ah. Engine Primer Switch (33, figure 2-7). The

also locks out the starter circuit. During normal

engine primer switch is a single pole, two position

operation, the battle short switch is in the OFF

toggle switch. When the START-RUN-STOP switch

position.

is in the START position and the ENGINE PRIMER

switch is moved to the ON position, and then releas-

x. Battle Short Indicator (23, figure 2-7). The

ed, it actuates the ether starting aid. During opera-

battle short indicator is a press-to-test indicator

tion, the switch remains in the OFF position.

lamp with a red lens. It illuminates when the battle

short switch is moved to the ON position and the

ai. Running Time Meter (34, figure 2-7). The

generator set is operating.

running time meter is a time totalizing meter which

indicates total engine operating time in hours and

y. Voltage Adjust Rheostat (24, figure 2-7).

tenths of hours.

The voltage adjust rheostat allows adjustment of the

generator set output voltage.

aj.

Battery Charging Ammeter (35, figure 2-7).

The battery charging ammeter is a dial indicator

z. Synchronizing Lights (25, figure 2-7). The

type gauge which measures dc current flow to and

synchronizing lights are indicator lights with clear

from the battery. It is calibrated in 1 ampere incre-

lens. They indicate the synchronization of frequency

ments from -10 to +20. Normal indication of the

when the operation switch is placed in the

meter is dependent upon the stat e of charge of the

PARALLEL position for paralleling of the generator

battery. A low charge such as exists immediately

sets.

after engine starting, will result in a high reading.

When enough charge has been restored to the battery

aa. Operations Switch (26, figure 2-7). The

the indicator should move near 0.

operations switch is a four pole, two position,

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