EXPERIMENT 4: THREE-PHASE TRANSFORMER BANK CONFIGURATION AIM: To configure a three-phase transformer bank using threesingle-phase transformers. APPARATUS: 3 X single – phase transformers (100VA, 230/15.6 V) Voltmeters AC variable power supply METHOD: Connect the 3 X single-phase transformers to form a three-phase transformer bank for the following configurations: Star-star (Y-y) Star-delta (Y-∆) Delta-delta (∆-∆) Delta-star (∆-y) The high-voltage side (HV) is connected to a three-phase supply and a lighting load to the low- voltage side (LV) of the transformer. Determine and measurethe phase and line voltageson both sides of a three-phase transformer bank in each configuration.