3-phase AC GEN
12-27-2009 | 07:30 AM
#11
Line Holder
Joined: Jul 2009
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12-27-2009 | 08:45 AM
#12
No one's home
Joined: Aug 2006
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the 707, 727 and 737 all had similar electrical sys with 3 phase 120 volt 400 cycle gens rated at 40kVa. The new 787 is a MONSTER for electricity since many systems are now electric (gear, flaps, nosewheel steering, air conditioning/pressurization).
from the web:
Note, with the new systems will come a plethora of new terms, abbreviations and jargon. 
Ground school instructor:"today we look at the "EPPGIZ" and its components"
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: Jul 2008
Posts: 349
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From: BE50C (A), BE95 (A), C172S (B)
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: Nov 2006
Posts: 775
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From: B-767 Captain
Correctly Stated
You're absolutely correct IluvRNP. The Seven-Oh (B-707) was the first of the long Boeing line to utilize that type of electrical system. That philosophy continued through the 777; however, a new design has been implemented with the 787.
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 !!
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
Line Holder
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From: None
01-11-2010 | 06:22 AM
#19
Line Holder
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From: None
My point was that captains at my airline did receive both initial and recurrent training F/E panel time.
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