GE Aviation Systems PP-8474/G DC Power Supply for 28V Avionic Systems. 18-30V / 60A. NSN 6130-01-475-4999 120VAC 50/60 Hz input. P/N 715875-1
Note - This power supply can be used as a general purpose DC Power Supply if you only need output in the 18-30V range and don't require adjustable current limiting.
GE Aviation Systems PP-8474/G