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SYSTEMS > Electrical > Flashcards

Electrical Flashcards

1
Q

What is the purpose of the AH-64D Electrical System?

A

Generate, convert, regulate, distribute, control, monitor, and protect electrical power throughout the aircraft.

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2
Q

Which system distributes unswitched power to electrical loads controllers requiring greater than 20 Amps AC or 25 Amps DC?

A

Primary Power System

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3
Q

The two HPSMs and the MSTR IGN key switch are part of the _____ power system.

A

primary

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4
Q

Which system receives unswitched power from the HPSMs and distributes electrical power to load controllers requiring less than or equal to 20 Amps AC or 25 Amps DC?

A

secondary

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5
Q

Two CBPs and two ELCs are part of the _____ power system.

A

secondary

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6
Q

What does the Electrical Power Management System (EPMS) provide?

A

Circuit Protection
Automatic Bus Tie
Distribution of all Primary and Secondary power

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7
Q

What components make up the EPMS?

A

Two HPSMs
Two CBPs <> MSTR IGN switch
Two ELCs <> Utility Relay Panel

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8
Q

What do the two High Power Switching Modules (HPSM) provide?

A

Power Distribution
Over Current Sensing
Contractor switching logic for all AC, DC, and BATT power requirements

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9
Q

_____ provides unswitched power to ELC1, CBP1, ECS1, and FCR Line Replaceable Units (LRUs).

A

HPSM1

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10
Q

_____ provides unswitched power to ELC2, CBP2, ECS2, and Battery Charger control logic.

A

HPSM2

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11
Q

The Circuit Breaker Panels (CBPs) are ______ and provide hard wired, unswitched circuit protection to meet demands for ________.

A

non-redundant

AC, DC, and Battery Secondary power requirements

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12
Q

Where do the CBPs receive power from?

A

HPSM

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13
Q

What component receives directly from the HPSM and routes power to the using component or system?

A

ELCs

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14
Q

What are the five Electrical Subsystems?

A

(1) Electrical Power Management System (EPMS)
(2) Battery Subsystem
(3) Alternating Current (AC) Electrical Subsystem
(4) Direct Current (DC) Electrical Subsystem
(5) External Ground Power Subsystem

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15
Q

MSTR IGN switch, ELC 1 & 2, CBP 1 & 2, HPSM 1 & 2, and Utility Relay Panel are all components of what subsystem?

A

Electrical Power Management System

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16
Q

The Battery and Battery Charger are major components of what subsystem?

A

Battery Subsystem

17
Q

AC GEN 1 & 2 and Generator Control Unit (GCU) 1 & 2 are major components of what subsystem?

A

AC Electrical Subsystem

18
Q

The two Transformer Rectifier Units (TRU 1 & 2) are major components of what subsystem?

A

DC Electrical Subsystem

19
Q

The External Power Receptacle, External Power Monitor, and External Power Sense Switch are all major components of what subsystem?

A

External Ground Power Subsystem

20
Q

Which distribution system distributes unswitched power to electrical load controllers requiring greater than 20 Amps AC or 25 Amps DC?

A

Primary Power Distribution System

21
Q

Which distribution system includes two HPSMs and MSTR IGN key switch?

A

Primary Power Distribution System

22
Q

Which distribution system receives unswitched power from the HPSMs and distributes electrical power to load controllers requiring less than or equal to 20 Amps AC or 25 Amps DC?

A

Secondary Power Distribution System

23
Q

Which distribution system includes two CBPs and two ELCs?

A

Secondary Power Distribution System

24
Q

What is the purpose of the Electrical Power Management System (EPMS)?

A

Distribution of Primary and Secondary electrical power as required for operation of the helicopter

25
Q

From what three sources can the EPMS receive electrical power?

A

AGPU
TRUs
Aircraft Battery

26
Q

What three things does the EPMS provide?

A

Circuit Protection
Automatic Bus Tie
Distribution of all PRI and SEC power

27
Q

What five components make up the Electrical Power Management System?

A

2 HPSMs, 2 CBPs, 2 ELCs, UTIL Relay Panel, MSTR IGN switch

28
Q

The _____ provide power distribution, over current sensing, and contactor switching logic for all AC, DC, and BATT power requirements.

A

two HPSMs

29
Q

The ______ consists of AC and DC/BATT high power modules, control modules, connectors, provisions for mounting the CBPs, and EXT wire terminals and bus tie connections located on the XMSN side of both ___.

A

HPSMs

HPSMs

30
Q

HPSM1 provides unswitched power to ___________.

A

ELC1, CBP1, ECS1, and FCR LRUs

31
Q

HPSM2 provides unswitched power to ____________.

A

ELC2, CBP2, ECS2, and BATT charger control logic

32
Q

___ are non-redundant, two per aircraft, and provide hard wired, unswitched circuit protection to meet system demands for AC, DC, and BATT secondary power requirements.

A

CBPs

33
Q

CBPs receive power directly from the ______ and route the required power through circuit breakers to the ________.

A

HPSM buses

using component or system

34
Q

The _____ provides unswitched secondary power distribution to other systems or components located mainly on the left side of the airframe.

A

Circuit Breaker Panel 1 (CBP1)

SYSTEMS (5 decks)

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