002-139 ELEC Flashcards
(29 cards)
FSI Splash Screen
Nothing
Electrical System
Nothing
Lesson Objectives
Discuss
Lesson Organization - System Overview
Discuss
Electrical System
- Power supplied by
- 1 - Main Battery - 44Ah (24V)
- 1 - Aux Battery - 13 Ah, 27Ah, 28 Ah (24 V)
- 2 - Starter Generators
- External Power
Cockpit Controls & Indications
Discuss
- MFD Synoptic Page
- MFD CAS window
- Electrical Panel
Lesson Organization - DC Power
Discuss
DC Power System
External Power * 30.5 Volts Maximum Main Battery * Ni-cad / 24V / 44Ah Aux battery * Ni-Cad / 24 V / 13 Ah, 27Ah, 28 Ah DC Generators *
Main Battery
- Ni-Cad
- 44Ah / 24 Volts
- MAIN BATT HOT = 65*C
- Master Battery Switch connects Main and Aux batteries to the Essential busses (Main Battery = K1 , Aux Battery K2)
- Main Battery Switch connects the Main Battery to the #1 Main Bus (K3)
- K1 Relay - Essential Bus
- K3 Relay - Main Bus 1
- Minimum voltage for start = 23 volts
- Provide power to the Starter/generators for engine starting
Auxiliary Battery
- Ni-Cad / 24 V / 13 Ah, 27Ah, 28 Ah
- AUX BATT HOT = 65*C
- Powers the Battery Bus all of the time
- Aux Battery relay (K4) and master battery (K2) relays connect the aux battery to the ESS BUSSES (K2) and MAIN BUS 2(K4).
- Master Battery Switch connects Main and Aux batteries to the Essential busses (Main Battery = K1 , Aux Battery K2)
Battery Limitations
Discuss information on the slide
External Power
- Right hand nose section
- 3 Pins
- Ext PWR switch connects external power to the Main Bus 1
- EXT POWER DOOR CAS message
- Overvoltage 30.5 Volts the external power is disconnected from the system.
- When External power is introduced to the system, the Starter/Generators and Batteries will be disconnected from the system
Generator Control Units (GCU)
- Located below the baggage compartment
- Maintains 28V DC to the aircraft busses
- 1(2) DC GEN HOT CAS message
- Protection for:
- OVERVOLTAGE
- UNDERVOLTAGE - <5V
- FEEDER FAULT - Deferential feeder current exceeds 125 A
- BUS FAULT - Over current > 550A - Logic will try to clear the fault within 6 seconds if unsuccessful the Starter/Generator will disconnect
- REVERSE CURRENT - >10% of the rated load
DC Starter / Generators
- Installed on the accessory gearbox of its respective engine
- Acts as both a starter and generator.
DC Generator Load Indications
Discuss generator limitations and display.
DC Starter / Generator Limitations
Discuss Starter Generator Limitations
Lesson Organization
Discuss
DC Electrical Load Distribution
Discuss
Power Distribution Panels (PDP)
- Main busses are contained in PDPs
Power Distribution
Discuss power distribution
Main & Essential Buses
Discuss what systems are on the various busses
Services lost during bus failures
Discuss what is lost if a main or non-essential bus fails
Services available after bus failures
Discuss what would be available if the Essential bus was the only power available.
Bus Load Voltage Limitations
Discuss Bus load Limitations
