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Six
or Twelve Pulse with IPT (Double bridge construction),
Up to 10 KA DC, Up to 33kV, ONAN/OFWF cooling.
A rectifier transformer circuit permitting six-phase double-wye
operation with 120.degree. conduction, (without the use of
an inter phase transformer), and providing any predetermined
degree of phase shift. The transformer comprises a zigzag
wye primary winding and a six-phase star secondary winding.
By choosing the proper ratio for the turns of the zig and
zag portions of the primary winding, any degree of phase
shift can be obtained. The rectifier transformer is ideally
suited for multiple-phase installations wherein several
rectifier transformers are used, each providing a different
amount of phase shift, without the use of separate
phase-shift transformers.
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Rectifier Transformers 
