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67 Cards in this Set
- Front
- Back
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IDG'S SUPPLY POWER TO
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DIRECTLY TO THE 2 AC TRANSFER BUSSES
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IDG'S CONTROLLED BY
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GENERATOR CIRCUIT BREAKER, GCB
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TRANSFER BUSSES CONNECTED BY
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BY A BUS TIE & TWO BUS TIE BRKS
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THE TRANSFER BUSSES SUPPLY POWER TO
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TO THE REMAINING AC BUSSES AND THE TR'S
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MAIN BAT ENERGISES WHAT WHEN A/C PWR NOT AVAIL
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THE HOT BAT BUS & SWITCHED HOT BAT BUS WHEN A/C PWR IS NOT AVAILABLE
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IN EMERGENCY THE MAIN BAT ALSO SUPPLIES
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SUPPLIES BAT BUS, DC STBY BUS AND THE AC STBY BUS VIA AN INVERTER
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AUX BAT USED WHEN
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ONLY AS EMERGENCY PWR SOURCE FOR STBY BUS VIA AN INVERTER
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BAT CHGR USE
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MAINT BAT CHARGE. ALSO THE NML PWR SOURCE FOR THE HOT BAT & SWITCHED HOT BAT BUSSES
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HOW MANY BTB'S
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2 BETWEEN THE AC TRANSFER BUSSES
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HOW MANY GCB'S
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2 BETWEEN EACH IDG AND ITS TRANSFER BUS
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HOW MANY TR'S AND GIVE SOURCES OF POWER
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3 TR'S
-TR1 FROM AC TRANS BUS 1 -TR2 FROM AC TRANS BUS 2 -TR3 FROM EITHER AC TRANS 1 OR 2 |
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GND SERV SWITCH LETS YOU CONNECT
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CONNECT THE GND SERV BUSSES 1 & 2, THE BAT CHARGER, AC STBY BUS VIA BAT CHRG AND INVERTER
-ALSO POWER TO THE HOT BAT BUS, SW HOT BB, THE BAT BUS AND THE DC STBY BUS |
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2 BASIC RULES OF ELECTRICAL PWR ON THE 737
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AC POWER SOURCE CANNOT BE OPERATED IN 1-PARALLEL-ONLY ONE SOURCE OF AC PWR CAN BE CONNECTED TO A TRANS BUS AT A TIME
2-IF A 2ND PWR SOURCE IS CONNECTED TO A TRANS BUS THE FIRST SOURCE IS AUTOMATICALLY DISCONNECTED |
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WHAT ELECTRICAL CNTLS ARE ON THE OVHD PANEL
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1-AC/DC METERING PANEL
2-GEN DRIVE & STBY PWR PANEL 3-GND PWR & BUS SWITCH PANEL |
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THE CB PANELS ARE WHERE
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P6-BEHIND F/O SEAT
P18 BEHIND CAPT SEAT |
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AC PWR SYST MADE UP OF
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1-TWO TRANSFER BUSSES
2-TWO MAIN BUSSES 3-TWO GALLEY BUSSES 4-ONE AC STBY BUS 5-TWO GND SERV BUSSES |
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IF 2 PWR SOURCES CONNECTED AT THE SAME TIME
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BTB'S OPEN TO PREVENT PARALLEL OPS OF THE IDGS
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IF ONLY ONE PWR SOURCE
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THE BTB'S CLOSE TO SUPPLE PWR TO BOTH TRANSFER BUSSES.
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TRANSFER
BUS OFF LT MEANS |
TRANSFER BUS IS NOT ENERGIZED
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SOURCE OFF LT MEANS
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TELLS YOU NO PWR SOURCE IS SELECTED TO ENERGIZE THE TRANSFER BUS
ALSO ILLUMINATES WHEN THE GEN SW IS PUT ON AND THE RELATED GEN DOES NOT CONNECT AND SUPPLY PWR TO THE TRANSF BUS |
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GEN OFF BUS LT
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TELLS YOU THE TRANSF BUS IS NOT SUPPLIED POWER FROM THE RELATED IDG
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APU GEN OFF BUS LT
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SHOWS THE APU IS AVAILABLE BUT DOES NOT SUPPLY PWR TO THE BUS. THE LT EXT WHEN THE APU GEN IS CONNECTED TO A BUS
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GRD POWER AVAILABLE LIGHT
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ILLUMINATES WHEN GRND PWR OF GOOD QUALITY IS CONNECTED TO THE PLANE. LT DOES NOT EXT AFTER GND PWR IS CONNECTED TO THE PLANE
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WHEN GND PWR CONNECTED THE TRANS BUS OFF & SOURCE OFF LTS SHOW WHAT
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THEY ARE EXTINGUISHED
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IF ON GRND PWR AND YOU SELECT THE APU 1 SWITCH ON
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THE APU DISCONNECTS THE GND PWR FM THE TIE BUS
THE SOURCE OFF LT ILLUMS BECAUSE THE MANUALLY SELECTED SOURCE HAS BEEN AUTOMATICALLY DISCONNECTED |
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WHEN ENG 2 RUNNING & MOVING GEN 2 TO ON
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THE BTB OPENS, THE No2 IDG SUPPLIES PWR TO THE TRANSFER BUS No2
THE OTHER TRANSF BUS CONTINUES TO BE ENERGISED BY THE APU OR GND PWR IF CONNECTED |
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BOTH ENGINES RUNNING THE APU OFF GEN LT ILLUMS WHEN
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THE APU GEN IS NO LONGER CONNECTED TO A BUS
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NORMAL AC INDICATION IS
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NML VOLTS 115V +/- 5V
NML FREQ 400 +/- 10cps AMPS CHANGE WITH LOAD USE AC METER SELECTOR |
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AUTOMATIC GEN ONLINE FUNCTIONS HOW
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IF APU STILL SUPPLYING PWR THEN FAILS OR IS SHUT DOWN THEN THE IDG AUTOMATICALLY CONNECTS TO THE BUSSES
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WHAT ARE THE CONDITIONS FOR AUTOMATIC GEN ONLINE
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1-ONLY IN FLT
2-ONLY ONE TIME PER FLIGHT 3-IDG'S NOT CONNECTED TO BUSSES 4-APU FAILS OR IS SHUT DOWN AFTER TAKE-OFF |
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IF ONE PWR SOURCE IS LOST IN FLIGHT
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THE BTBs CLOSE & PWR IS SUPPLIED FROM A SERVICEABLE SOURCE
ELEC SYST AUTOMATICALLY LOAD SHEDS |
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WHAT IS THE ORDER OF THE LOAD SHEDDING
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-GALLEY BUSSES FIRST
-THEN MAIN AC BUSSES ARE DE-ENERGIZED ONE AT A TIME TILL LOAD FALL TO LESS THAN SYST LIMIT -WHEN PWR IS AVAILABLE BUSSES ARE ENERGIZED AGAIN - |
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DURING TAXI IN CAN YOU CONNECT THE APU GEN
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YES. AFTER THE APU GEN OFF BUS LTS ILLUM
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TRs SUPPLY WHAT VOLTAGE
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28V DC PWR
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WHAT VOLTAGE DO THE TRs CHANGE
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CHANGE 115V AC FM THE TRANS BUSSES TO 28V DC FOR THE DC BUSSES
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TR1 PWRD FROM
TR2 PWRD FROM TR3 PWRD FROM |
TR1-PWRD FM TRANS Bus1
TR2- FROM TRANS BUS 2 TR3- NML SOURCE IS TRANS BUS 2 BUT TRANS BUS1 CAN ALSO BE USED |
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TR3 ALSO KNOWN AS
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THE AUX PWR SOURCE IF TR1 OR TR2 FAILS
TR3 IS THE NML SOURCE OF PWR FOR THE BAT BUS |
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IF ONE TR FAILS
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THE REMAINING CAN SUPPLY PWR FOR THE DC LOAD
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CROSS BUS TIE RELAY IS
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THE DC BUSSES ARE CONNECTED BY THIS
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WHEN DOES THE CROSS BUS TIE RELAY OPEN
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AUTOMATICALLY ON GLIDE SLOPE CAPTURE
ALSO WHEN BUS TRANSFER SW PUT TO OFF |
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WHAT DOES THE OPENING OF THE CROSS BUS TIE RELAY DO
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OPENS TO ISOLATE THE NAVIGATION RECEIVERS & FLT CNTL COMPUTERS
THIS PREVENTS REMOVAL OF ALL APPR INFO BECAUSE OF ONLY 1 ELECTRICAL FAILURE |
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IF NML PWR TO DC BUSSES FAILS WHAT SOURCE IS USED
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BATTERIES ARE THE EMERGENCY SOURCE 2X24V NICAD
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EMERGENCY SOURCE OF PWR FM BAT IS FOR WHICH BUSSES
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1-STATIC INV
2-DC STBY BUS 3-BAT BUS 4-HOT BAT BUS 5-SW HOT BAT BUS |
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SW HOT BAT BUS IS CNTL'D BY
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CONTROLLED BY THE BAT SW
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AUTOMATIC BAT CHRGR GETS PWR FM
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AC GND SERV BUS2 WHEN PWR AVAIL
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AUX BAT CHRGR SUPPLIED FROM
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PWR FM AC TRANS BUS 1 AND GND SERV BUS 1
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NML DC IND IS
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26.0+/-4V, THE AMPS VARY WITH LOAD
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USE OF STBY PWR SYSTEMS
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SUPPLY AC & DC TO IMPORTANT ELECTRICAL COMPONENTS WHEN NML AC PWR NOT AVAIL FM ENGINES OR APU
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POWER FOR STBY SYSTEMS IS FROM
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BATTERIES & A STATIC INVERTER
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STBY SYSTEMS SUPPLY PWR TO WHICH BUSES
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1-AC STBY BUS
2-HOT BAT BUS 3-DC STBY BUS 4-BAT BUS 5-SW HOT BAT BUS |
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BATTERY PWR IS SUPPLIED FOR HOW LONG IF NO OTHER SOURCE IS AVAILABLE
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60 MINS
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WHAT HAPPENS IF ALL AC PWR IS REMOVED
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THE STBY PWR CONTROL UNIT AUTOMATICALLY CHANGES THE STBY SYST TO BAT PWR. THE CHANGE CAN TAKE PLACE ON THE GND OR IN THE AIR.
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IF THERE'S A FAILURE IN GEN1 AND BUS TRANS SW IS OFF
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THE TRANS BUS 1 AND ITS RELATED BUSSES ARE DE-ENERGISED
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ON THE GRND OR IN FLT IF APU IS THE ONLY ELECTRICAL SOURCE
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BUS TRANS OFF POSITION ARMS EACH BUS TIE BREAKER TO OPEN IF ITS RELATED APU GEN SW IS SET TO OFF
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IF APU GEN SW2 IS SET TO OFF THEN
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TRANS BUS 2 & ITS RELATED BUSSES ARE DE-ENERGISED BY THE No2 APU GEN SW
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BOTH GENS DISCONNECTED WHAT HAPPENS TO THE AUTOPILOT AND WHAT ANNUNS DO YOU GET
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DISENGAGES AND CANNOT BE ENGAGED UNTIL A GEN IS AVAILABLE
ALSO GET THE MC & ELEC SYST ANNUN ILLUM, THE TRANS BUS OFF, SOURCE OFF & GEN OFF BUS LTS FOR BOTH GENS |
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IF SOURCE OFF LIGHT REMAINS ILLUM
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IT'S NECESSARY TO PREVENT HIGH ELEC LOADS BEFORE A GEN IS CONNECTED TO THE SYSTEM (IE BUS TRANS OFF, ELEC HYD PUMPS OFF)
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ACTIONS BOTH GENS DISCONNECTED
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1-TRY TO RECONNECT IF FAILS
2-BUS TRANS SW OFF 3-TURN OFF ELEC HYD PUMP 4-IF AVAILABLE START APU WITH BUS TRANS SW OFF 5-CONNECT APU GENS 1 AT A TIME 6-MOVE BUS TRANS TO AUTO 7-MOVE APU GEN 2 TO ON TO EXT SOURCE OFF LT 8-TURN ON ELC HYD PUMPS ONE AT A TIME IF 2 SOURCE OFF LIGHTS FAIL TO EXT -STBY SYST ON BAT PWR -LAND AT NRST SUITABLE AIRPORT |
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IF A GEN FAILS TO RECONNECT IE SOURCE OFF LT STAYS ON ACTIONS
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-START THE APU IF AVAIL
-CONNECT THE APU GEN |
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ACTIONS FOR TRANSFER BUS OFF LT ILLUM
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SAME AS FOR SOURCE OFF LT-
START APU CONNECT APU GEN |
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STANDBY PWR OFF LT ILLUMINATED
ACTIONS |
PWR IS NOT AVAIL TO SOME PART OF THE STBY PWR SYST
-MOVE STANDBY SW TO BAT (BAT SUPPLIES THE STBY SYST) |
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WHEN DOES DRIVE LT ILLUM
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WHEN THE IDG HAS LOW OIL PRESS OR
THE ENGINE IS NOT RUNNING |
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THE DISCONNECT SWITCH LETS YOU
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DISCONNECT AN IDG FROM ITS ENGINE DURING A NON-NORMAL SITUATION.
-CAN ONLY BE RECONNECTED ON THE GROUND BY MAINTENANCE |
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BAT DISCHARGE LT ILLUM
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BAT SW IS ON & BATT DISCH IS LARGE
ALSO DURING APU START ON BAT PWR ITS NML FOR THE LT TO ILLUM FOR A SHORT TIME THEN EXT |
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TR UNIT LT ILLUM ON THE GROUND
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A TR HAS FAILED
IE TR1 , TR2, OR TR3 |
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TR UNIT LT ILLUM IN THE AIR
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WHEN ONE OR TWO TRs HAVE FAILED IE TR1 OR TR2 & TR3
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ELEC LT ILLUM
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TELLS YOU THERE IS A FAILURE IN THE DC OR STBY PWR SYST. ONLY ILLUM ON THE GROUND
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