Atp Electrical

Front 1

Under what conditions will the electrical system operate as two separate, independent systems?

Back 1

When 4 or more generators are online. ;

Front 2

When is the ground service bus powered?

Back 2

The ground service bus will be powered when a GPU is powered and plugged into the aircraft but not selected and the batteries are off. ;

Front 3

What buses are energized while in the essential power mode?

Back 3

The essential buses, hot battery buses and the central dc bus. ;

Front 4

Which of the following is still available in essential power mode? Flaps, pressurization, and/or normal gear extension.

Back 4

Normal gear extension. ;

Front 5

Describe the number of generators and respective voltage of the electrical system.

Back 5

5 generator each capable of producing 28 VDC and 400 amps.;

Front 6

Can the GPU be used to recharge the main aircraft batteries?

Back 6

No, BC1 and BC2 open automatically when the GPU is selected and supplying power. ;

Front 7

What items are powered from the 115 VAC Bus?

Back 7

TCAS, E-GPWS, Windshear. ;

Front 8

Which electrical bus supplies power to the ISIS on the 145XR?

Back 8

The backup battery hot bus. ;

Front 9

Under what conditions are shed buses powered while on the ground?

Back 9

With GPU powering the aircraft and the shed bus switch in the auto or override position. With at least one generator online and the shed bus in the override position. With 3 or more generators online. ;

Front 10

How many minutes will the NICAD main batteries supply power in flight when in the essential power mode?

Back 10

40 minutes or 45 minutes with pitot/static 3 heat deselected. ;

Front 11

Will the electrical system still be configured as two separate systems after the loss of the APU generator and engine driven generator 1?

Back 11

No. At least 4 generators must be online to have redundant electrical systems. ;

Front 12

Of the cockpit screens, FMS, RMU’s, and flight instrumentation, which are available in the essential power mode following a loss of all generators?

Back 12

The EICAS, RMU1/2, and the standby instruments/ISIS. ;

Front 13

What criteria must be established in order to have shed bus power in flight?

Back 13

At least 3 generators must be online for shed bus power in flight. ;

Front 14

With GPU power available and selected, where should the shed bus switch be positioned to energize the shed buses?

Back 14

Auto or Override. ;

Front 15

Is DME available when is essential power mode?

Back 15

No, but VOR or LOC type approaches may be flown so long as DME is not required. ;

Front 16

Define the EICAS master warning ELEC ESS XFR FAIL.

Back 16

The electrical system has failed to properly transfer into the essential power mode following a loss of all generators. ;

Front 17

What is the function of the backup battery button on the overhead panel?

Back 17

The backup battery button connects or disconnects the backup battery from the electrical system (via hot bus1). ;

Front 18

What does the GPU AVAIL inscription on the GPU button on the overhead panel indicate?

Back 18

The GPU AVAIL inscription indicates that the GPU is properly connected to the aircraft receptacle and some power is available (not necessarily sufficient or stable power though). ;

Front 19

What items are powered from the backup battery/backup hot bus?

Back 19

The Electrical Distribution Logic, the 5 Generator Control Units and the ISIS (XR only). ;

Front 20

What is the power source for SG 2?

Back 20

DC Bus 2. ;

Front 21

How are the emergency light batteries charged?

Back 21

The emergency light batteries are charged by Essential DC Bus 2. ;

Front 22

How are the aisle pathways illuminated on the XR, and what charges it?

Back 22

The aisle path lighting is provided from photoluminescent strips. The strips must be charged by allowing an un-obstructed exposure to the normal cabin lighting for 10 minutes on the first flight of the day. ;

Front 23

What power source energizes the emergency lighting system on the 135 EP/LR, 145 EP/LR?

Back 23

Four dedicated batteries provide power to the emergency lighting system. The batteries are charged via essential DC bus 2 when they are not in use. ;

Front 24

How long will the emergency lighting last?

Back 24

The batteries will provide power for approximately 15 minutes. ;

Front 25

Is it possible for the flight attendant to activate emergency lighting if the cockpit emergency light switch is set to OFF?

Back 25

Yes, the flight attendant may override the cockpit switch and turn on emergency lighting anytime. ;

Front 26

Can the emergency light batteries be charged while they are in use?

Back 26

No, the batteries are only charged when the emergency light switch is in the ARM position and the lights are not in use. ;

Front 27

Will the nosewheel taxi and landing light remain illuminated following gear retraction?

Back 27

No, the lights are automatically extinguished when the nose gear isn’t down and locked. ;

Front 28

What is the power source of the nosewheel taxi and landing lights?

Back 28

The nosewheel lights are shed bus powered. ;