ARMY TM 9-6115-60412
NAVY NAVFAC P-8-633-12
1.
HEXAGON HEAD CAPSCREW
9.
NUT AND CAPTIVE WASHER ASSEMBLY
2.
LOCKWASHER
10.
UTILITY POWER CIRCUIT BREAKER CB125
3.
CIRCUIT BREAKER ENCLOSURE COVER
11.
SET POWER CIRCUIT BREAKER CB124
4.
HEXAGON HEAD CAPSCREW
12
SCREW AND CAPTIVE WASHER ASSEMBLY
5.
LOCKWASHER
13.
FLAT WASHER
6.
CIRCUIT BREAKER SUPPORT
14.
SPACER
7.
PAN HEAD SCREW
15.
NUT AND CAPTIVE WASHER ASSEMBLY
8.
FLAT WASHER
16
CIRCUIT BREAKER LOCKING BEAM
Figure 4-79. Utility/Set Circuit Breaker Assembly (Sheet 2 of 2)
4-138. UTILITY STATION POWER TRANSFORMER T103 . UTILITY STATION POWER TRANSFORMER T103
transforms 380 V ac to 120/240 V ac for distribution panel DP1 and DP2 and is located inside engine control cabinet C.
Dangerous voltage levels may be present at components located within cabinet C.
Observe all applicable safety precautions as outlined In Chapter 1, Section III , of this
manual.
NOTE
All megohmmeter tests must be performed for 30 to 60 seconds.
a.
Test.
(1)
Tag and disconnect wiring from UTILITY STATION POWER transformer T103.
(2)
With multimeter set to RX10 scale, check continuity of primary winding across primary taps H1 and
H2; and H2 and H3. Check continuity of secondary winding across secondary taps X1 and X2; and
X2 and X3. Multimeter should read less than 10 ohms.
(3)
Connect a 500 V dc megohmmeter to either primary tap (H1 or H3) and to ground. Operate the
megohmmeter for 60 seconds and observe resistance. Reading should not be less than 10
megohms.
(4)
Connect the megohmmeter to either secondary tap (X1 or X3) and to ground Operate the
megohmmeter for 60 seconds and observe resistance. Reading should not be less than 10
megohms.
(5)
Connect a 500 V dc megohmmeter across the primary and secondary windings. Operate the
megohmmeter for 60 seconds and observe resistance. Reading should not be less than 10
megohms.
(6)
If UTILITY STATION POWER transformer T103 fails any test described above, refer to the next
higher level of maintenance.
(7)
Connect wiring and discard tags.
4-139. SET STATION POWER TRANSFORMER T101. SET STATION POWER transformer T101 transforms 2400 V
ac to 120/240 V ac for distribution panels DP1 and DP2 and is also located In the rear compartment of cabinet C.
Dangerous voltage levels may be present at components located within cabinet C.
Observe all applicable safety precautions as outlined in Chapter 1, Section III, of
this manual.
a.
Test.
(1)
Tag and disconnect wiring from SET STATION POWER transformer T101.
(2)
With multimeter set to RX1 scale, individually check continuity of transformer primary (H1 and H2
terminals) and secondary (X1 and X2, X2 and X3 terminals) windings.
4-200
