Three phase transformer consists of three sets of primary windings, one for each phase, and three sets of secondary windings wound on the same iron core. Three-phase transformers can have their windings connected in various ways: star, delta or zigzag connection. The connection type must be specified on the.
Vector Groups are the IEC method of categorizing the primary and secondary winding configurations of 3-phase transformers. The clock method is used to produce the numerical index of the vector .
In electrical engineering, a vector group is the International Electrotechnical Commission (IEC) method of categorizing the high voltage (HV) windings and low voltage (LV) winding configurations of three-phase transformers.
The vector group designation indicates the windings configurations and the difference in phase .
A Review about Vector Group Connections In Transformers.