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43 Cards in this Set
- Front
- Back
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How many generators are there?
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4 total
2 engine generators 1 APU generator 1 emergency generator |
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Do the generators provide AC or DC?
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AC
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If normal AC fails, how can you get AC?
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From an emergency generator
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If all AC power is not available, how can you get AC?
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By inverting the batteries's DC into AC
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How many generators on each engine?
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1 per engine
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The IDGs are a _______ phase engine
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3 phase
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What kind of power do the IDGs produce?
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90 KVA of power at 115V and 200V at 400 Hz
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What do GCUs do? (What 2 main functions)
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1. Control the freq and voltage of the generator output
2. Protect the network by controlling the associated GLC |
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What does GLC stand for?
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Generator Line Contactor
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Where on the plane do you connect the ground power connector?
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Near the nose wheel
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What does GAPCU stand for?
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Ground and Auxiliary Power Unit
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What functions do the GAPCU have?
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1. Regulates, via the APU Electronic Control Box, the freq and voltage of the APU generator when the No Break Power Transfer is required
2. Protects the network by controlling the external power contactor and the APU GLC |
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What kind of power does the emergency generator provide?
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5KVA of 4 phase 115V and 200V 400 Hz power
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Which hydraulic circuit drives the emergency automatically?
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Blue hydraulic circuit
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A static inverter provides what kind of power?
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1 KVA single phase
115V 400 Hz AC power |
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How is the static inverter activated ABOVE 50 kts?
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Automatically if nothing but the batteries are supplying electrical power regardless of BAT 1 and BAT 2 PB positions.
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How is the static inverter activated when BELOW 50 kts?
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The inverter is activated if nothing but the batteries are supplying electrical power, and the BAT 1 and BAT 2 PBs are both on at auto
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What kind of power is supplied by the MAIN transformer rectifiers?
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up to 200A of DC
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How many transformer rectifiers are there?
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3 total
2 on each main generator line 1 on the emergency generator |
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How many batteries are there?
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2 main batteries
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How many amp hrs do you get from a main battery?
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23 Ah
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What does a BCL do for a battery? How many are there?
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A BCL monitors battery charging and controls its battery contactor. There is one for each engine.
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What is the difference between a monitored CB and a non-monitored CB?
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A Monitored (Green) CB gives an ECAM warning if the CB is out for more than a minute.
A Non-Monitored (Black) CB has no warnings. |
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Why do the Wing Tip Brake CBs have red caps?
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To prevent them from being reset in flight.
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What is the order of priority between GEN1, GEN2, APU GEN, or EXT PWR?
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1. GEN1 and GEN2
2. EXT PWR (If selected ON) 3. APU GEN |
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Between GEN1, GEN2, APU GEN, or EXT PWR, which of these can singlehandedly power the entire network?
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All of these can power the entire network
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Normal AC ESS BUS is supplied by what?
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By AC BUS 1 via a contactor
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If a battery needs charging, how do they get charged?
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By connecting to the DC BAT BUS
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How many DC BAT BUSs are there?
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1 DC BAT BUS
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Once a battery gets fully charged, what disconnects it?
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The "battery charge limiter" disconnects it from the DC BAT BUS.
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On the ground, how can you use external power to supply AC and DC to GND/FLT BUSES without supplying the entire aircraft network?
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Using the MAINT BUS switch in the forward entrance area.
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If one generator fails, what happens?
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Automatic switch to the APU GEN.
If APU GEN isn't available, the other engine's GEN replaces it instead and sheds part of the galley load. |
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If AC BUS 1 fails, what happens?
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AC BUS 2 automatically supplies AC ESS BUS, and DC ESS BUS via ESS TR.
DC BUS 2 supplies DC BUS 1 and DC BAT BUS automatically after 5 secs. |
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What happens if one TR fails?
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The other TR automatically replaces the faulty one.
The ESS TR supplies the DC ESS BUS. |
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When does the contactor of each TR open automatically? (Which 2 situations)
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1. Overheat
2. Minimum Current |
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What happens when TR1 and TR2 fail?
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DC BUS1, DC BUS2, DC BAT BUS are lost.
The DC ESS BUSS is supplied by the ESS TR |
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What does the RAT do and when does it deploy?
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The Ram Air Turbine extends automatically if AC BUS 1 and AC BUS 2 are lost and speed is at least 100 kts.
The RAT powers > Blue HYD sys powers > hydraulic motor runs > emergency generator |
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What happens when all main generators fail ABOVE 100 kts in the air?
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The RAT powers the emergency GEN which powers the AC ES BUS, ESS TR, and DC ESS BUS.
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What happens when both main GENs fail, and the RAT stalls, or if the aircraft is on the ground slower than 100 kts?
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Emergency network automatically transfers to batteries and static inverter.
AC SHED ESS and DC SHED ESS are shed. When the aircraft is on the ground: BLW 100 kts, DC BAT BUS is automatically connected to the batteries BLW 50 kts, AC ESS BUS is autmatically shed, leading to a loss of all display units |
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How long does RAT extension and emergency coupling take?
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8 seconds
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What happens to the electrical system in the smoke configuration?
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Electrical distribution is the same as emegency electrical config except the fuel pumps are connected upstream of the GEN 1 Connector. The procedure sheds 75% of electrical equipment.
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What happens when you press the IDG PB switch?
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The IDG gets disconnected from its driveshaft
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Once the IDG is disconnected from its driveshaft, how can it be reconnected?
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Only by maintenance personnel.
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