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DELTA-DELTA, WYE-WYE, DELTA-WYE and WYE-DELTA. The most commonly used configuration is DELTA-WYE. When creating a DELTA winding using single-phase transformers, great care must be taken to ensure proper phasing and proper polarity. If a DELTA is completed with the wrong polarity, it is possible to create a dead short between phases, resulting ... ................
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