AH 64 Contact Checkride (Electrical System,

Created by RyanKirkeby 

Upgrade to
remove ads

14 terms

The primary purpose of the electrical system is __ of primary or secondary electrical power for operation.

Distribution

The electrical system manages __, __, __, and __ coming in.

DC
AC
Battery
Power

The High Power Switching Modules provide power to __, __, and __.

Circuit Breaker Panels
Electrical Load Centers
Environmental Control System.

The Electrical load centers provide __ protection, __ control logic, and __ power distribution for AC, DC, and battery power requirements.

Circuit
Switching
Secondary

The Utility Relay Panel provides __ capability for the current sensing contactors in each __. Also provides __ capability for each __ contactor. The panel is disabled when a/c is __.

reset
HPSM
Trip ECS
airborne

The master ignition pannel consists of three position switches controlled by the pilot.

OFF, BAT, EXT

At 80% charge, the battery will provide power for __ mins at __degrees C.

12
25

The AC electrical system consists of __ generators and __ GCUs (Ground Control Units). Generators are mounted on and are driven by the XMSN __. Each one can supply __ electrical power. The GCUs manages __ to satisfy electrical power requirements. After the APU is started at __%RPM, GCU energizes primary bus contactor. It provides generator protection by disconnecting generator for the following: Undervoltage (__+-__VAC or less) Overvoltage (__+-__VAC or more), underfrequency, overcurrent, and feeder __ between the generator output and system loads.

2 2
AGB
Enough
Generator
95
99.5 5
125 1.5
fault

The DC electrical system provides __VDC power for the A/C converting power from the HPSM to regulated __VDC. It consists of __ regulated transformer rectifier units.

28
28
2

The Transformer Rectifier Units is the primary source of __ power. In the event of dual failure, the __ will supply all DC loads.

DC
Battery

The APU drives the accessory section of the main __, which provide HDY pressure, __, and __ power. It supplies air to the __. The fuel consumption is approximately __lbs per hour.

XMSN
AC DC
APU
175

What are the automatic shutdown features for the APU? LOLOLO

Loss of speed sensor signal
Over temp
Loss of Temp signal
Over current
Low oil pressure
Overspeed

The APU Load Control Valve opens when the APU reaches __%. It will close when the APU is __ or when APU __ __ is pressed.

95
shutoff
Fire button

The APU Power Takeoff Clutch provides __ and __ of the APU and AGB via the #__ driveshaft. It normally engages at 60% APU speed or above main rotor speed of __to__%Nr.

decoupling
coupling
7
94 96

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

NEW! Voice Recording

Click the mic to start.

Create Set