GB OR BTB CLOSED, TX BUS POWERED BY GEN BUS 1. GBs OF ENGINE ,APU GB & BTBs ARE INTERCHANGABLE AS MAGNETIC LATCHĪPU CAN BE SWITCHED TO ONLY ONE SIDE IN FLIGHT. GROUND DIFFERENTIAL PROTECTION TRANSFORMER MOUNTED ON APU GENERATOR ARE INTERCHANGABLE WITH ENGINE GROUND DIFFERENTIAL PROTECTION TRANSFORMERS.ġ.THERE IS NO PARALLELING OF AC SOURCE OF POWER.Ģ.THE SOURCE OF POWER SWITCHED ONTO OR ENTERING THE SYSTEM TAKES PRIORITY AND WILL TRIP OFF, OR DISCONNECT THE EXISTING SOURCE.ģ.A SOURCE OF POWER DOES NOT ENTER THE SYSTEM AUTOMATICALLY IT HAS TO BE SWITCHED ON WHEN VOLTAGE AND FREQUENCY IS RIGHT.
PERMANENT MAGNETS MOUNTED ON EXICTER FRAME BETWEEN 6 STATOR POLES ELIMINATES FLASHING OF FIELD AS RESIDUAL VOLTAGE PROVIDED THIS FIELD GENERATES THE USEFUL AC OUTPUT VOLTAGE IN THE AC STATOR. THE VOLTAGE IS RECTIFIED AND FED INTO THE AC GENERATOR ROTATING FIELD. EXICTER FIELD SUPPLIES DC POWER FROM VOLTAGE REGULATOR, THIS CAUSES 3 PHASE VOLTAGE TO BE DEVELOPED IN THE EXICTER ARMATURE. GENERATOR CONSISTS OF AC EXICTER GENERATOR,A ROTATING RECTIFIER AND MAIN GENERATOR.ĪC EXICTER CONSISTS OF 6 POLE STATIONARY DC FIELD AND ROTATING ARMATURE. GENERATORS 40 KVA,0.95 LEADING TO 0.75 LAGGING,POWER FACTOR 120/208 VOLTS,400HZ AC. IF IN TEMP IS HIGH IT MEANS THE CSD COOLER IS CLOGGED. RISE AROUND 10ø TO 15øC.IF RISE IS MORE MEANS CSD IS WORKING HARDER THAN NORMAL. MANUALLY TRIPPED CSD ALSO TRIPS ENGINE GCR OR FIELD RELAY. ĬHARGE FILTER INDICATOR POPS OUT AT 40 TO 55 PSI.įILL PORT-> EXTERNAL FILTER-> COOLER-> CSD-> FILL PORT. GOVERNOR ADJUSTMENT ON CSD FOR FREQUENCY ADJUSTMENT. OPENS AT 50 PSI,AND FULL OPEN AT 90 PSID.ĮXTERNAL FILTER METAL SCREEN, CLEANABLE TYPE, NO BYPASS ONLY INDICATOR. IN CASE OF CABIN CLIMBING ON DESCENT :-ģø FROM CLOSE, FWD OUTFLOW VALVE OPEN.ĪC GENERATOR RATED 40 KVA EACH, APU GENERATOR RATED 40 KVA ON GRD, 45 KVA IN FLT AS BETTER COOLING.ĬSD OIL COOLER HAS THERMAL BYPASS FULL OPENS BELOW 150øF. OUTFLOW VALVE:- 1/2ø FROM CLOSE FWD VALVE CLOSED.
SWITCH CLOSES CONTACTS WHEN VALVE GATE IS 1/2ø FROM CLOSE. OUTFLOW VALVE ACTUATOR BRAKE:- 20 TO 29 VDC.ĪC ACTUATOR CLUTCH:- NORMALLY ENGAGED, DISENGAGED WITH 28VDC. SYBY MODE:- CABIN PREPRESSURIZED TO 200 FT BELOW RUNWAY ELEVATION.ĬABIN ALT :- > 14,625 FT,OUTFLOW VALVE CLOSES. WHEN A/C CABIN PRESSURE IS 0.25 PSI FROM AMBIENT PRESSURE.Ģ.>1 PSI/MIN RATE OF PRESSURE CHANGE.
MAIN DISTRIBUTION MANIFOLD RELIEF VALVE OPENS:-ġ7" WATER LIMITS TILL 27" WATER.ĬABIN PREPRESSURIZED TO 189 FT BELOW RUNWAY ELEVATION FOR T/O AND 300 FT BELOW RUNWAY ELEVATION FOR LANDING.ĬHANGE FROM ASCENT TO ISOBARIC SCHEDULE:. S4:- INLET MODULATION PANEL AND EXHAUST LOUVERS ALMOST CLOSED. S3:- AFTER S3 CONTROLLER RELEASED,FLAPS UP,230øF SENSOR TAKES OVER. S2:- FLAPS DOWN,A/C IN AIR,DEFLECTOR DOOR CLOSED.
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