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One must check the design of the transformer windings. STAR - Delta or Star to star or Delta - star or Delta Delta. Wiring must be done accordingly.
the connection here meant for the connection of windings in three core or limbs of a transformer. it might be delta or star connected.
delta star
Star has one red, one yellow, one blue and neutral phases seperatelly. Delta has all four in sequence, combined.
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The power of all three phases can be transmitted on three conductors.A star connection, as opposed to a delta, provides a grounding reference. Also, for ground faults on the secondary (assuming no delta third winding, or source third winding) will be a direct ratio similar to phase faults, instead of 57%. Another reason is to avoid the inherent phase shift involved in a delta/star configured transformer.Another AnswerA 'star-connected' secondary is the standard European connection for a three-phase distribution transformer, as it provides a line voltage of 400 V together with a phase voltage (i.e. line to neutral) of 230 V.
It is used in where the transformer are connected in star delta.
A star winding has a red yellow and blue phases. The centre point of every stay winding is used as d nuetral point. Hence the star winding in a transformer enables a nuetral point.
A: In the USA there is D delta connection or Y connection. The Y center point may not be zero if there is circulating current due to mismatch of the phases
With a transformer...
With a transformer...
The voltage phase shift between primary and secondary connections in a transformer is 180 electrical degrees.