Hi MBR,
Old FCOM 1.24.10 P 13.
"The emergency generator supplies the AC ESS BUS and the DC ESS BUS, via the ESS TR.
When the landing gear is down, the emergency generator is no longer powered, and the emergency generation network is automatically transferred to the batteries and static inverter, and the system automatically sheds the AC SHED ESS and DC SHED ESS buses."
When the gear is down (NOSE L/G UP / DOWN logic) then the emergency generator is isolated from AC ESS and ESS TR.
Your DC EMER CONFIG was because you had lost DC1, DC2 and DC ESS busbars - thus no more DC ESS.
See this link to
Old RAT.pdf
The new RATs have a lower stalling speed and the logic is to keep the Emergency generator coupled until the RAT stalls or if on ground and GS<100 kts. The nose gear logic has been removed.
On new aircraft, I suspect the warning about loosing DC ESS with gear down is in error.
