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Thread: A320 APU
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Old 4th Apr 2015, 18:09
  #13 (permalink)  
Togue
 
Join Date: Feb 2010
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I agree with this:

Originally Posted by whitelabel
As long as the dc bat bus bar is supplied then it will close and fire protection will work. See fcom electical supply.

And


Originally Posted by Checkboard
In normal configuration TR1 supplies the DC BAT BUS.

i.e. the DC BAT BUS will be powered from the EXT PWR, even if the BATs are selected off.

If the APU starter motor is connected to the DC BAT ( by External Power via AC1-TR1-DC1 ) even with the Battery PB off (DSC 24-10-30-20 P2/4 27 NOV 13) why the APU won't start?
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