Gday All
I will have a bash at it !
The ELMS HOT BATT LATCH RELAY in P310 keeps ELMS powered for 90 secs after the BATT is switched off. This allows APU door to close, also DRIVE LIGHTS remain illuminated and brake accumulator indicates pressure.
In flt the relay ensures P310 EEU remains powered to control stby pwr if RAT is deployed
I am a mere mechanical mortal, I am sure some Avionics genious will give a better explanation.
Cheers !
Great reply thanks QF22, just what we needed
