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jgracin

9th May 2007 11:14

Electrical power configurations, on B777

Hi! Is it possible that, under normal operation, an electrical bus is being powered by two or more other buses at the same time? Or is it always energized from at most one other bus (in case when it is not connected to power source).

LME (GOD)

10th May 2007 07:58

on the ground the 777 has "no break power transfer". This means during a power source changeover from say GPU to APU, or APU to engines the sources are paralleled momentarily. This ensures a smooth changover. The feature does not work in the air. As far as memory serves there is no dual source busses....but i'll peruse the books again:sad:

jgracin

10th May 2007 08:52

Quote:

Originally Posted by LME (GOD) (Post 3279557)

As far as memory serves there is no dual source busses....but i'll peruse the books again:sad:

Yeah, as far as I know, B737 is strictly one source at the time per bus. It's probably the same with B777.

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