Electrical Power Point - ATR 42 Study Guide：电源点的ATR 42学习指南.ppt

With the battery switch offWith the battery switch offand no GPU hooked up, and no GPU hooked up, these buses are poweredthese buses are any of the followingWhen any of the followingdoors are opened, the Grounddoors are opened, the GroundHandling Bus is energized Handling Bus is energized through the Battery Transfer through the Battery Transfer HDLG BUSHOT EMER BAT BUS+-HOT MAIN BAT BUS+-Hot Main BatteryHot Emergency Battery1. Cargo Door Access Panel1. Cargo Door Access Panel2. Refueling Panel2. Refueling Panel3. Main Cabin Door3. Main Cabin Door4. Auxiliary Hydraulic Pump 4. Auxiliary Hydraulic Pump Push Button is depressed. Push Button is you walk into the cockpit If you walk into the cockpit and observe a and observe a GREEN AVAILGREEN AVAILlight on the main electrical light on the main electrical panel, these buses are now panel, these buses are now BUS 2INV 1INV 201212ESS BUSSTBY BUSEMER BUSDC BUS 2DC BUS 1AC BUS 1EXTERNAL POWEREGHRWhen the GPU is plugged in, theWhen the GPU is plugged in, theExternal Ground Handling RelayExternal Ground Handling Relaycloses taking priority over the Buscloses taking priority over the BusTransfer Relay. The BTR then Relay. The BTR then HDLG BUSHOT EMER BAT BUS+-HOT MAIN BAT BUS+-Hot Main BatteryHot Emergency BatteryBTRDC SVCE BUSIf the If the DC SERVICE BUSDC SERVICE BUS push pushbutton is depressed on thebutton is depressed on theflight attendant panel, thenflight attendant panel, thenthe DC SERVICE BUS is the DC SERVICE BUS is powered through the powered through the Service Bus Transfer Bus Transfer SVCE BUSPASSLAVCAPTLAVCARGOEMER LTCALLSSMOKEGALLEYLAV LATPASSDIM UPRPASSENTR AFTCARGOREAD LTVENTACDCThe GPU is now poweringThe GPU is now poweringthe Ground Handling Bus the Ground Handling Bus and the DC Service the DC Service POWE