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727 Captain >> 727 Captain >> FIX: loss of avionics, engines crossfeed
https://www.captainsim.org/forum/csf.pl?num=1312571202

Message started by windplayer on Aug 5th, 2011 at 7:06pm

Title: Re: FIX: loss of avionics, engines crossfeed
Post by BrianG on Aug 15th, 2011 at 4:17am
Lou,
Thanks for the 727 electrical information. I think I see the big picture of running generators in parallel to share the  loads but I'm still unclear on the function of the field breaker, bus tie breaker and generator breakers.
Accord to what I read, the generator breaker in the closed position provides power from the generator to its bus, and the bus tie provides power from the bus to the sync bus, which enables parallel operation of more than one generator.  And the filed generator energizes each generator when closed.
With that said,  if you want power the aircraft with just one generator ( I don't know if you'd ever want to do this)  would you have just that particular field and generator breaker closed and all other field and generators breakers tripped?
In another scenario, if you wanted parallel #1 and #2 you would close their field, bus tie, and generator switches and trip # 3 bus tie?
Also, it seems in normal operation all bus ties, field and generator switches are closed. Does that mean that all three generators are operating in parallel?
I hope I'm some what on track here. This electrical configuration seems hard to grasp. Thanks for providing this information.
Regards,
Brian

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