UTC Z-7405 RCA B-476457-1 5.5 Hy 250 mA Filter Choke  30 Ohms  

Magnetically shielded & hermetically sealed.

7.5 Watts at full load - doesn't even get warm.

Paint is pretty scratched up. 

Weighs over 13 #

1 terminal is slightly bent but intact

Passes 60 second 60 Hz 2500 Volt RMS HiPot™ test, should be fine for 1500 Volt RMS service.