... 3)CTQC,ISO9001,ISO14001,CE 110kv three-phase three winding no-load-tap-changing power transformer •Main Function And ... are independently provided with voltage-regulating winding to balance the ampere turn of each winding-up, effectively lower the axial electrodynamic ... transformer and improve abrupt short-circuit withstanding capacity.4) The winding adopts radial “0” margin designed, between the core ...