View Full Version : PA44 electrical system
selfin
3rd Nov 2007, 18:07
Can someone who is familiar with the Seminole electrical system explain why there is a 25 A BTB between the AVI buses?
http://img162.imageshack.us/img162/9650/pa44180electky2.th.jpg (http://img162.imageshack.us/my.php?image=pa44180electky2.jpg)
(Click the thumbnail to see a large diagram of the electrical system.)
Dysonsphere
3rd Nov 2007, 18:29
looking at it as a sparks i would imanige it is there to cross power the AVI stacks
selfin
3rd Nov 2007, 21:20
Hardly when the 40 A breaker trips... is it only to protect against a relay failure? Other than this I can't really see the benefit.
L-Band
4th Nov 2007, 07:09
It is there in case of a avionics bus relay failure to make sure you do not lose both sides of the avionics bus.
L
selfin
4th Nov 2007, 14:09
Thanks for the clarification.
Hi Selfin, I moved this here after a day or so as you were not getting much views in the other forum. :)
Short_Circuit
4th Nov 2007, 20:49
It is there to stop a short on one bus taking out both busses i.e. both nav / com would otherwise die. Not ideal situstion for just one unit turning to toast.
S_cct