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All of the three-phase Transformers in the SquareD/Schneider Electric catalog have Delta connected primaries. What do I do if I have a Wye connected service?

Delta connected primaries on three phase Transformers

Product Line:
LV Transformers

Applies to three phase Transformers by SquareD/Schneider Electric

Both Delta and Wye power systems are commonly available


Delta connected primaries are perfectly suitable for use on Wye services. The contractor uses the 3 phases and ground from the service into the Transformer and does not include the neutral wire. The reason that Wye primaries are not normally recommended is that Wye-Wye and Wye-Delta Transformers have special application issues that must be observed to avoid serious problems. As a result, they are seldom used in the electrical industry. For further information contact your distributor or local SquareD/Schneider Electric sales office.

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