IS 2026-1 (2011): Power transformers, Part 1: General

three-phase transformers, a set of three-phase supply voltages which are approximately ... a circuit in order to alter its voltage and/or shift its phase. The other winding is an energizing winding. ... connected or zigzag connected winding. b) For single-phase transformers: The terminal intended for connection to a

  Phases, Shifts, Transformers, Phase transformer, Zigzag