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E2-190 systems > Electrical > Flashcards

Electrical Flashcards

1
Q

What are the main components of the Electrical system in E2-Embraer?

A

Controls and Indications, AC and DC Systems, Electrical Power distribution and control, external power supply connections.

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2
Q

How is the operation of the Electrical System characterized?

A

Automatic operation generating, distributing, and managing both AC and DC power.

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3
Q

What components make up the AC system?

A
  • Two integrated drive generators
  • One auxiliary power unit generator
  • One External AC power receptacle for AC GPU connection
  • One ram air turbine
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4
Q

What components make up the DC system?

A
  • Two NICD batteries
  • Three transformer rectifier units (TRU)
  • One external DC ground power unit (DC GPU)
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5
Q

Where is the electrical system controlled and monitored?

A

From the Electric panel on the glareshield.

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6
Q

What does the Electric synoptic page illustrate?

A

Electrical flow lines indicating voltage sensing.

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7
Q

What does the IDG selector knob do in the AUTO position?

A

Allows automatic operation of the electrical main generation system.

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8
Q

What happens when the IDG selector knob is moved to the OFF position?

A

The respective generator line contactor opens, isolating the IDG from the AC BUS.

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9
Q

What indicates a fault in the IDG?

A

The IDG fault indication LED illuminates.

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10
Q

What does the EICAS message IDG 1 (2) OIL indicate?

A

A high oil temperature or low oil pressure in the IDG.

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11
Q

How is the APU generator operated?

A

Pushing the APU generator button in allows automatic operation; pushing it out isolates the APU generator.

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12
Q

What are the three positions of the AC BUS TIES selector?

A
  • 1 OPEN
  • AUTO
  • 2 OPEN
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13
Q

What does the AVAIL light indicate on the AC GPU button?

A

The AC GPU is connected to the airplane and power quality requirements are satisfied.

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14
Q

What does the IN USE light indicate on the AC GPU button?

A

The AC GPU is powering the airplane AC electrical system.

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15
Q

What does the DC GPU supply power to?

A

The APU START BUS APU External Power Receptacle (28 VDC).

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16
Q

What happens when the TRU essential switch is in the OFF position?

A

It isolates the TRU ESS from the DC ESS BUS 3.

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17
Q

What do the TRU icons display?

A

Their respective outputs (voltage and amperage).

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18
Q

What happens to the battery icons when the batteries are off?

A

They appear in white.

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19
Q

What is the function of the Ram Air Turbine (RAT)?

A

It serves as an emergency AC electrical device.

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20
Q

When is the RAT automatically deployed?

A

When IDG 1 and IDG 2 fail and the APU generator is not available.

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21
Q

What is the minimum deployment speed for the RAT?

A

150 knots.

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22
Q

What is the purpose of the batteries during RAT deployment?

A

To provide backup power to the DC essential BUSES.

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23
Q

What is the significance of the DC BUS TIES switch?

A

It allows automatic operation of the electrical system in the auto position.

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24
Q

What happens if the batteries are the only power source on ground for more than 5 minutes?

A

A horn sounds to alert ground personnel.

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25
What is the priority for supplying power to the APU START BUS?
The DC GPU has priority over battery 2.
26
What voltage range should a suitable DC GPU supply for APU start?
At least 24 VDC and no more than 32 VDC.
27
What does the EICAS CAUTION message TRU 1 (2) FAIL indicate?
The TRU icon displays in white crossed in amber or green crossed in amber.
28
What is the role of the transformer rectifier units (TRUs)?
They convert AC power from AC BUSES into DC power.
29
What happens during a No-Break Power Transfer (NBPT)?
It avoids electrical transients during power transfer on ground.
30
When is the APU generator isolated from the AC BUS TIE?
When the APU is started.
31
What type of external power supply is used for the APU?
28 VDC external power supply.
32
What is the function of the Ground service button?
To connect the GPU directly to the AC ground service BUS for maintenance.
33
What is the required voltage range for the PU during use?
At least 24 VDC and no more than 32 VDC
34
Which battery is used to start the APU and what is the minimum temperature requirement?
Battery 2, minimum temperature of -20°C
35
When checking battery voltage, what condition invalidates the check?
If any AC source is powering the airplane
36
What provides power distribution and control of electrical power in the system?
Four Integrated Control Centers (ICCs) and two Secondary Power Distribution Assemblies (SPDAs)
37
What does the Electrical-Power Generation-and-Distribution System (EPGDS) do?
Automatically controls operational modes according to available power sources and system logic
38
What are the four Integrated Control Centers (ICCs) in the electrical system?
* Left Integrated Control Center (LICC) * Right Integrated Control Center (RICC) * Emergency Integrated Control Center (EICC) * Auxiliary Integrated Control Center (AICC)
39
What is the function of an SPDA?
An electrical load management unit that distributes power from ICC AC/DC electrical buses
40
What types of circuit breakers can be found in the system?
* Thermal circuit breakers * Electronic circuit breakers
41
How can flight crew monitor circuit breakers?
Visually inside the cockpit and remotely through the MCDU
42
What is the significance of the Circuit Breaker MENU status page?
Displays the status of circuit breakers and various options for monitoring
43
What is the function of the DC ESS BUS 1?
Powers essential systems such as smoke detectors and emergency equipment
44
What is the purpose of the left integrated control center?
Provides power distribution and protection for AC bus 1 and DC bus 1
45
What does the right integrated control center protect?
AC bus 2, DC bus 2, and DC essential bus 2
46
What is a characteristic of electronic circuit breakers?
They may be reset from the MCDU OUT/LOCK page
47
What does the emergency integrated control center provide protection for?
AC essential bus and DC essential buses One and Three
48
True or False: Remote thermal circuit breakers can be reset by the flight crew.
False
49
What is the primary means of electrical power distribution in the aircraft?
AC and DC electrical buses
50
What are the line replaceable modules in the LICC?
* Transformer rectifier unit 1 * Ground control unit 1 * AC external power module * Several thermal circuit breakers
51
What does the DC essential bus 2 provide?
Power to essential loads in case of damage to the forward electronics bay
52
What are the main components of the DC BUS 1?
* Static Heat Port AMSC1 * VHF COMM MOD 3 * Ground Control Unit 1 * Several other components
53
Fill in the blank: The __________ provides power distribution and protection for the APU start bus.
Auxiliary Integrated Control Center (AICC)
54
What does the Circuit Breaker by System option display?
Status of Circuit Breakers associated with the selected system
55
What is the purpose of the Electrical tables in the AOM?
Identifies the electrical buses and the equipment powered by them
56
What is included in the DC BUS 2 load distribution?
* LH DUST VALVE * RH DUST VALVE * VHF COMM MOD 2 * Several other components
57
What type of power does the APU require for starting?
DC power from Battery 2
58
What is the role of the MCDU in relation to circuit breakers?
Allows the flight crew to reset remote electronic circuit breakers
59
What does the FUSE option in the Circuit Breaker MENU display?
Fuse status
60
What happens when the batteries are the only power source?
They discharge
61
What does the term 'Integrated Control Center' refer to?
An electrical-electronic device for power distribution and protection
62
What is the importance of the Emergency Integrated Control Center (EICC)?
Ensures power distribution for essential systems during emergencies
63
Which integrated control center includes the essential transformer rectifier unit?
Emergency Integrated Control Center (EICC)
64
True or False: The flight crew can reset remote thermal circuit breakers while in flight.
False
65
What is the role of the Auxiliary Integrated Control Center (AICC)?
Provides power distribution and protection for APU start bus and hot battery bus Two
66
What does the Ground Control Unit (GCU) do?
Manages power distribution for specific electrical loads
67
What is the function of the DC APU/ENGINE PUMP?
Powers the APU and engine hydraulic systems
68
What are the main components of the DC ESS BUS 2?
* AMSC2 CHB * Co-Pilot Audio Panel * Cargo Bay Bottles * Several other components
69
Fill in the blank: The __________ controls the operation of the hydraulic motor pumps.
SPDA
70
What type of power do the transformer rectifier units provide?
AC to DC conversion
71
What does SPDA stand for?
SPDA stands for Secondary Power Distribution Assembly. ## Footnote SPDA modules provide electrical load management and protection.
72
What is the function of the SPDA modules?
Provide electrical load management and protection to the wirings used to feed the airplane systems.
73
How is power received from ICCs managed?
Power received from ICCs is re-distributed to the airplane systems and configurations according to system distribution logic.
74
What do the electronic modules in SPDA do?
Provide communication, data processing, and power distribution.
75
How many independent DC BUSES power the SPDAs?
Four independent DC BUSES power the SPDAs.
76
What is the purpose of having multiple DC BUSES?
Provide redundancy and ensure system segregation.
77
What is the role of the SPDA in electrical systems?
Works as a circuit breaker and/or relay interfacing the electrical buses with the airplane systems.
78
What happens during overload protection in abnormal operations?
The SPDA commands load shedding protection whenever the electrical load increases beyond the system limit.
79
What does load shedding protection do?
Deactivates some non-essential components that will be restored once the secondary AC power supplier is recovered.
80
What is the primary function of the electrical power generated in the airplane?
Directed to the airplane systems through the SPDA.
81
What allows some airplane components to operate if the primary power source fails?
An alternate connection with the electrical buses.
82
True or False: The electrical system does not have automatic load shedding capability.
False.
83
Fill in the blank: The electrical power generated is directed to the airplane systems through the _______.
SPDA.

E2-190 systems (8 decks)

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