Electrical System Sample

ith the battery switch off ith the battery switch off nd no GPU hooked up, nd no GPU hooked up, hese buses are powered hese buses are powered. hen any of the following hen any of the following oors are opened, the Ground oors are opened, the Ground andling Bus is energized andling Bus is energized hrough the Battery Transfer hrough the Battery Transfer elay. elay. GND HDLG BUS HOT EMER BAT BUS + - HOT MAIN BAT BUS + - Hot Main Battery Hot Emergency Battery . Cargo Door Access Panel . Cargo Door Access Panel . Refueling Panel . Refueling Panel 3. Main Cabin Door 3. Main Cabin Door Auxiliary Hydraulic Pump Auxiliary Hydraulic Pump Push Button is depressed. Push Button is depressed. BTR

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Transcript of Electrical System Sample

With the battery switch offand no GPU hooked up, these buses are powered.When any of the followingdoors are opened, the GroundHandling Bus is energized through the Battery Transfer Relay.1. Cargo Door Access Panel2. Refueling Panel3. Main Cabin Door4. Auxiliary Hydraulic Pump Push Button is depressed.BTR
If you walk into the cockpit and observe a GREEN AVAIL light on the main electrical panel, these buses are now powered.EGHRWhen the GPU is plugged in, theExternal Ground Handling Relaycloses taking priority over the BusTransfer Relay. The BTR then opens.
If the DC SERVICE BUS pushbutton is depressed on theflight attendant panel, thenthe DC SERVICE BUS is powered through the Service Bus Transfer Relay.The GPU is now poweringthe Ground Handling Bus and the DC Service Bus.SBTR
Now we turn on the Main Battery Toggle Switch.AVAILSHEDEXT PWRDC GEN 2DC GEN 1INV 1INV 2DC SVCE/UTLY BUSBAT SELMAINEMERGBTCOFFONOVRDBATMAIN BAT CHGEMER BAT CHGSBTR
Now we turn on the Main Battery Toggle Switch.AVAILSHEDEXT PWRDC GEN 2DC GEN 1INV 1INV 2DC SVCE/UTLY BUSBAT SELMAINEMERGBTCOFFONOVRDBATMAIN BAT CHGEMER BAT CHGSBTR
Now we turn on the Main Battery Toggle Switch.AVAILSHEDEXT PWRDC GEN 2DC GEN 1INV 1INV 2DC SVCE/UTLY BUSBAT SELMAINEMERGBTCOFFONOVRDBATMAIN BAT CHGEMER BAT CHGSBTR
Now with the main batteryon, these buses are powered.FAULTAVAILSHEDDC GEN 2DC GEN 1DC SVCE/UTLY BUSBAT SELMAINEMERGBTCEXT PWREMER BAT CHGINV 1OFFONOVRDBATMAIN BAT CHGINV 2SBTR
When the external power pushbutton is depressed, these buses are powered.FAULTAVAILSHEDDC GEN 2DC GEN 1DC SVCE/UTLY BUSBAT SELMAINEMERGBTCEXT PWREMER BAT CHGINV 1OFFONOVRDBATMAIN BAT CHGINV 2SBTR
When the external power pushbutton is depressed, these buses are powered.FAULTAVAILSHEDDC GEN 2DC GEN 1DC SVCE/UTLY BUSBAT SELMAINEMERGBTCEXT PWREMER BAT CHGINV 1OFFONOVRDBATMAIN BAT CHGINV 2ONSBTCEGHRBTRSBTRACBTRASTR
When DC Bus 1 is powered the Static Inverter Override Transfer Contactor (SDTC) closes and the HBTC (Hot Bat Transfer Contactor opens).FAULTAVAILSHEDDC GEN 2DC GEN 1DC SVCE/UTLY BUSBAT SELMAINEMERGBTCEXT PWREMER BAT CHGINV 1OFFONOVRDBATMAIN BAT CHGINV 2ONSBTCEGHRBTRSBTRACBTRASTR