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Does SquareD/Schneider Electric advise the paralleling of Transformer primaries or secondaries?

Transformers can parallel to increase KVA capacity, but not without complications 

Product Line:
LV Transformers

Applies to Low Voltage Transformers by SquareD/Schneider Electric

Applications can require an increase in KVA capacity from smaller Transformers


No. Because of widely variable internal characteristics of Transformers, even those from the same production run, paralleling of similar Transformer primaries and secondaries is not normally recommended, because of possible complications.  See attached Bulletin 7400DB0701 for more details.


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