DC ESS BUS AIRBUS
Thread Starter
Joined: Jul 2014
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From: Paris, France
DC ESS BUS AIRBUS
When there is DC 1 BUS fault, the DC2 BUS supplies DC 1 BUS via DC BAT. But does the TR ESS comes automatically to supply DC ESS BUS and what is the use of TR1 then? Thanks
Joined: Apr 2001
Posts: 382
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From: England
Yes it does.
TR 1 will be doing nothing and if DC Bus 1 is being powered from DC Bus 2 via the DC Bat bus then presumably DC Bus 1 itself is fine and the most likely reason why it had to be powered this way is because TR 1 itself has failed.
This is for the A320 anyway.
TR 1 will be doing nothing and if DC Bus 1 is being powered from DC Bus 2 via the DC Bat bus then presumably DC Bus 1 itself is fine and the most likely reason why it had to be powered this way is because TR 1 itself has failed.
This is for the A320 anyway.
Thread Starter
Joined: Jul 2014
Posts: 185
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From: Paris, France
Thanks for your reply! I really wanted the answer on the Airbus fleet, so once again thank you! Just to reconfirm: does the TR ESS comes automatically to supply DC ESS BUS or is there any button?
AF330
AF330
Joined: Apr 2001
Posts: 382
Likes: 10
From: England
No worries. Yes, it's automatic if its just a TR failure.
If it was due to AC Bus 1 failing on some older A320s you need to press the AC ESS feed button which will power the AC ESS Bus from AC Bus 2 and consequently the DC ESS Bus via the ESS TR. But on newer ones even that's automatic. But that's a different fault to your original question anyway.
If it was due to AC Bus 1 failing on some older A320s you need to press the AC ESS feed button which will power the AC ESS Bus from AC Bus 2 and consequently the DC ESS Bus via the ESS TR. But on newer ones even that's automatic. But that's a different fault to your original question anyway.
