Figure 4-79. Utility/Set Circuit Breaker Assembly (Sheet 2 of 2)

Figure 4-79. Utility/Set Circuit Breaker Assembly (Sheet 1 of 2)

TM-9-6115-604-12 Generator Set Diesel Engine Driven Tactical Skid Rtd. 60 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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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

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