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  1. crumble

    3V0 via broken delta connection or numerically derived within a protection relay

    Thanks for the replies. I work as a consultant for a variety of utilities and the 'broken delta' connection is quite common on legacy systems. Given many numerical relays have four VT inputs is often possible to connect the 'broken delta' to the fourth VT(PT) input. I hadn't come across the...
  2. crumble

    3V0 via broken delta connection or numerically derived within a protection relay

    I was reading through this old thread trying to find an answer to my question. http://www.eng-tips.com/viewthread.cfm?qid=216248 I work a protection engineer and I'm doing a bit of reading into the merits of Neutral Voltage Displacement (NVD) or Residual Voltage Protection being based on either...

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