ARMY TM 9-6115-604-12
NAVY NAVFAC P 8 633-12
4-103. SYNCHROSCOPE METER M106 (5, Figure 2-2). SYNCHROSCOPE meter M106 indicates the phase angle
difference between the bus and a generator to be paralleled.
a.
Test. SYNCHROSCOPE meter M106 can be checked while Installed by comparing operation with the
synchronizing lights.
(1) Start the generator set and place in parallel operation mode. Parallel generator set will provide bus voltage
for phase comparison against output voltage of generator set being tested.
(2) With incoming unit operating at a higher frequency than the bus, SYNCHRONIZING LIGHTS DS110 and
DS111 should be glowing light and dark. SYNCHROSCOPE meter M106 pointer should rotate in the
clockwise (FAST) direction and should pass through the 12 o'clock position when the SYNCHRONIZING
LIGHTS are dark (center of dark period).
(3) Lower frequency of incoming set using FREQ ADJ rheostat R102. SYNCHROSCOPE pointer should rotate
in the counterclockwise (SLOW) direction but still pass through the 12 o'clock position when the
SYNCHRONIZING LIGHTS are dark.
(4) When the load circuit breaker CB101 is closed, and the generator set is In parallel with the bus, the
SYNCHROSCOPE needle should be in the 12 o'clock position
b.
Remove. See Figure 4-66.
(1) Open cabinet B door Tag and disconnect wiring to SYNCHROSCOPE meter M106 (4)
(2) Remove screws and remove SYNCHROSCOPE meter M106 (4) from front of cabinet B door.
c.
Install. See Figure 4-66.
(1) Install SYNCHROSCOPE meter M106 (4) and secure In cabinet B door with screws provided.
(2) Connect wiring and discard tags. Close cabinet B door.
4-104. GEN TEMP GAGE M105 (10, Figure 2-2). GEN TEMP gage M105 indicates the temperature of any one of six
detectors imbedded in generator G1 windings.
a.
Test.
(1) Tag and disconnect wires to terminals 1 and 2 on rear of GEN TEMP gage M105.
(2) Connect a 120V AC power source across terminals 1 and 2 on rear of GEN TEMP gage M105.
(3) Set TEMPERATURE INDICATOR switch S113 to CAL, and note movement of indicator in GEN TEMP gage
M105 Indicator should rest within the green area on the dial face of GEN TEMP gage M105.
(4) If indicator of GEN TEMP gage M105 does not rest within the green area of the dial face, adjust GEN TEMP
gage M105 In accordance with step c, below.
(5) Replace GEN TEMP gage M105 if adjustment is not possible, or If indicator shows no signs of movement
when tested.
b.
Remove. See Figure 4-66.
(1) Tag and disconnect wires from GEN TEMP gage M105 (8).
(2) Remove attaching hardware and remove GEN TEMP gage M105 (8) from front of cabinet B door.
c.
Install. See Figure 4-66.
(1) Install GEN TEMP gage M105 (8) and secure in cabinet B door using mounting hardware provided.
(2) Connect wiring and discard tags. Close cabinet B door.
(3) While set Is operating, set TEMPERATURE INDICATOR switch S113 (13, Figure 2-2) to CAL, and adjust
screw on GEN TEMP gage M105 until needle is on green mark.
4-168
