3-phase AC GEN
12-27-2009, 07:30 AM
#11
Line Holder
Joined APC: Jul 2009
Position: None
Posts: 67
Originally Posted by Dougdrvr
If you couldn't get a generator on line as a new, wet behind the ears, FE and you turned to the left seat and said " Cap'n, we have a Phase Un-balance!"......... I guarantee you the response would be, "What the he11 is that?"
12-27-2009, 08:45 AM
#12
No one's home
Joined APC: Aug 2006
Posts: 1,091
Originally Posted by IluvRNP
As I recall the 707 (preceded the 727) was about the same.
from the web:
*
Electrical Power Generating and Start System (EPGSS): The EPGSS generates and controls the electrical power on the airplane. The system also provides the APU and main engine start capability, and the motor controls are multiplexed to drive the cabin air compressors and electric motor pumps. The EPGSS comprises four main engine-mounted variable frequency starter generators and two APU-mounted auxiliary starter generators. It also includes eight common motor starter controllers, six generator control units and two bus power control units. The system will produce 1.450MW of electrical power – five times the power generation capacity of the 767 and enough to power 400 homes. This will be the first time a large turbofan engine has been started electronically, and the EPGSS provides key technologies that enable the 787 to be the first "more electric" airplane.
Electrical Power Generating and Start System (EPGSS): The EPGSS generates and controls the electrical power on the airplane. The system also provides the APU and main engine start capability, and the motor controls are multiplexed to drive the cabin air compressors and electric motor pumps. The EPGSS comprises four main engine-mounted variable frequency starter generators and two APU-mounted auxiliary starter generators. It also includes eight common motor starter controllers, six generator control units and two bus power control units. The system will produce 1.450MW of electrical power – five times the power generation capacity of the 767 and enough to power 400 homes. This will be the first time a large turbofan engine has been started electronically, and the EPGSS provides key technologies that enable the 787 to be the first "more electric" airplane.
Ground school instructor:"today we look at the "EPPGIZ" and its components"
12-30-2009, 04:00 PM
#13
Gets Weekends Off
Joined APC: Jul 2008
Position: BE50C (A), BE95 (A), C172S (B)
Posts: 349
Originally Posted by HSLD
Yep, you've gotta turn the KVARs knob until the light stops blinking - THEN throw the bus tie.
By definition, that means out of sync when the lights are on. Kindly do not close the bus tie breaker when the lights are on...
If you couldn't get a generator on line as a new, wet behind the ears, FE and you turned to the left seat and said " Cap'n, we have a Phase Un-balance!"......... I guarantee you the response would be, "What the he11 is that?"
01-02-2010, 07:02 AM
#15
Snakes & Nape
Joined APC: Nov 2006
Position: B-767 Captain
Posts: 775
Correctly Stated
Originally Posted by IluvRNP
As I recall the 707 (preceded the 727) was about the same.
I thought that the 777 was unique in that the APU had a 90 KVA generator that would start both engines simultaneously, run both packs and carry 110% of the rated aircraft load. I guess the new B-787 will top that as III Corps posted.
Good day mates...and "let's start 1 & 3 and delay #2". Boy, those were the days !!
01-06-2010, 05:04 PM
#17
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Joined APC: Jul 2009
Position: None
Posts: 67
Originally Posted by alarkyokie
Glad to see someone mentioned the 400hz/60hz diff in aviation power...
Here's one to think on; a Weller soldering gun (110-60hz) will work on
400 cycle, but a 400hz device won't work on 60 cycle. Why?
Here's one to think on; a Weller soldering gun (110-60hz) will work on
400 cycle, but a 400hz device won't work on 60 cycle. Why?
01-11-2010, 06:22 AM
#19
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Joined APC: Jul 2009
Position: None
Posts: 67
Originally Posted by SomedayRJ
If one light is on while the other is off, something's rather wrong with the generator.
My point was that captains at my airline did receive both initial and recurrent training F/E panel time.
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