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C57.105 - Guide for Application of Transformer Connections in Three-Phase Electrical Systems

This guide describes transformer connections and configurations in 3-phase electrical systems. The characteristics of the various transformer connections and possible operating problems under normal or abnormal conditions are treated. All combinations of delta and wye, grounded and ungrounded, T connected, zigzag, and certain special connections are considered. Only two-winding and auto-transformers are included.
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