A320 battery voltage indicator
 

Hello, does anyone know, where can I find written where is it connected the battery voltage indicators which remain on although battery pbs are off?

My other question is that checking my FCOM im not sure if HOT BAT BUS remain energized even when batteries off....has anyone read about this?

Thanks again!

HOT BAT BUS is the only circuit always energized ("HOT")

FCOM DSC 24-10-20 DC GENERATION

BATTERIES
Two main batteries, each with a normal capacity of 23 Ah, are permanently connected to the two hot buses.

FCOM PRO-NOR-SOP-04 P 1/8

 If the aircraft has not been electrically supplied for 6 h or more, perform the following check:


BAT 1 pb and BAT 2 pb....................................................CHECK OFF

BAT 1 and 2 VOLTAGE...................................................CH ECK ABOVE 25.5 V

So....the indicators are only energized by their respective hot buses and not from any other alkaline battery that feed the digits or something like that ...

Thanks everybody!