GND transformer Δ transformer

A grounding transformer or earthing transformer is a type of auxiliary transformer used in three-phase electric power systems to provide a ground path to either an ungrounded Y or a Δ connected system. Grounding transformers are part of an earthing system of the network. They let three-phase systems accommodate phase-to-neutral loads by providing a return path for current to a neutral. Grounding transformers most commonly incorporate a single winding transformer with a zigzag winding configuration, but may also be created with a Δ-Y transformer. In this case, the voltages are as follows: Between phases 12,5kV; Between phases and neutral 7,2kV. Flip on the SPST switches to turn on primary high voltage. Switch between the voltmeters to see the different voltages.

published 1 year ago