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MH60 KNOWLEDGE > Electrical > Flashcards

Electrical Flashcards

1
Q

AC sources

A

AC Generator (x2)
APU AC Generator
External Power

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2
Q

DC sources

A

DC Converters (115VAC to 28VDC)
SLAB (24VDC)

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3
Q

AC Gen locations

A

MGB Accessory Modules

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4
Q

AC Gen output

A

30/45 KVA, 115 VAC, 3 Phase, 400 Hz

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5
Q

APU Gen output

A

20/23.8 KVA, 115 VAC, 3 Phase, 400 Hz

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6
Q

Generator Control Unit (GCUs) monitor what?

A

Overvoltage
Under-voltage
Under-frequency (on ground only)
Feeder Fault (open or short)

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7
Q

External Power monitor regulates what?

A

Phase rotation
Overvoltage
Under-voltage
Under-frequency
Over-frequency

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8
Q

Automatic AC bus switches compensates for AC Gen load. AC bus switching prioritizes what two systems?

A

1: Hydraulic back up pump
2: Rotor De-Ice

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9
Q

Gens may not reset in flight if Nr is below ____%

A

97%

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10
Q

“APU GEN ON” indicates what?

A

The APU Gen is the only source of AC power

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11
Q

DC Converters are located where

A

LH and RH J-Boxes

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12
Q

DC Converter output

A

28 VDC, 200 Amps

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13
Q

Main aircraft battery output
SLAB: Sealed Lead-Acid Battery

A

24 VDC, 5.5 amp hrs

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14
Q

SLAB Primary and Secondary functions

A

Primary: APU start
Secondary: Emergency DC power

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15
Q

SLAB life is ____ mins w/out shedding and _____ w/ shedding.

A

W/out shedding: 34 mins
W/ shedding: 41 mins

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16
Q

HEELS controller is located where?

A

Aft cabin absorber

17
Q

Emergency Egress lights while illuminate under what conditions?

A

3 I’s: Inversion, Immersion and Impact (10 G’s)

18
Q

Cockpit Lighting

A

Map Lights and Thunderstorm light

19
Q

Cabin Lighting

A

Normal/NVG modes, Hoist operator light

20
Q

RH (STBD) position light color

A

Green

21
Q

LH (PORT) position light color

A

Red

22
Q

Aft position light color

A

White

23
Q

Anti-Collision light color

A

Day: White
Night: Red

MH60 KNOWLEDGE (11 decks)

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