TM 1-1520-238-T-6
9–222
9–48.
EXTERNAL POWER AND GROUND SERVICE UTILITY RECEPTACLE –
9–48
WIRING INTERCONNECT DIAGRAM (cont)
NOTES:
HIGHWAY USE: THE ALPHA CHARACTER IDENTIFIES A SPECIFIC LINE, AND THE NUMBER IN PARENTHESIS IDENTIFIES THE
SHEET NUMBER WHERE THE SIGNAL TERMINATES.
1. CLOSES WHEN 28 VDC IS APPLIED TO K7 SOLENOID THROUGH EXT PWR POSITION OF BATT / EXT PWR SWITCH S3.
THIS APPLIES 115 / 200 VAC. 3Ø POWER FROM EXT POWER RECEPTACLE TO AC CONTACTORS FOR AC BUS POWER.
2. SHOWN WITH RECEPTACLE DOOR (R345) CLOSED. OPEN DOOR CLOSES SWITCH 13, WHICH PROVIDES GROUND FOR
EXT PWR LIGHT INDICATOR.
3. 28 VDC FROM GENERATOR CONTROL SWITCH CLOSES CONTACTOR, WHICH APPLIES 115 / 200 VAC, 3Ø POWER FROM
GENERATOR TO AC BUS (GENERATOR CONTROL SWITCHING LOGIC).
4. MANUALLY RESETS EXTERNAL POWER MONITOR AFTER INCORRECT PHASE OR UNDER OR OVER VOLTAGE OR
FREQUENCY CONDITION.
5. JUMPER WIRE IN MATING PLUG OF GPU.
6. AVIONICS CONFIGURATION - BATTERY CHARGER (TM 11-1520-238-23-2).
7. FUEL SYSTEM (TM 1-1520-238-T-7).
8. DC ELECTRICAL POWER GENERATION.
9. AC ELECTRICAL POWER GENERATION.
10. CIRCUIT PROTECTION SYSTEM AC ESS BUS 1 - PILOT STATION.
11. CIRCUIT PROTECTION SYSTEM AC ESS BUS 2 - PILOT STATION.
M69-346-6A
SHEET 6 OF 6
END OF TASK
