11. An internal mains transformer was added. 12. This is because removal of the mains transformer means that the load has electrical continuity with the input. 13. The ABB supplied main transformer has four secondary taps, switchable to supply 1360 V under all electrification supplies. 14. The LED must be driven by a half wave rectifier from the mains transformer , or by an oscillator. 15. I have a mains transformer which used to power a doorbell, but is now disconnected on the doorbell side. 16. The plant underwent refurbishment in 2006 by having its reactor vessel head, low pressure turbines and main transformer replaced. 17. A mains transformer will usually have many more turns on the primary than the number of input volts . "' 18. AC / DC sets without mains transformer would use " U " tubes of the same types, e . g. 19. The bunker still contains much its original air conditioning plant, fans, mains transformer , blast doors, electrical switchgear and rotary converters. 20. Most VO units are installed in commercial premises, in between the raw mains transformer and main low voltage distribution board.
