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  1. ngminhtrung

    Why dont use the restricted earth fault protection for autotransfo?

    Thank Slavag for ur consideration, but now I understand,it's fault of 7UT6 relay technical manual. In manual of version 4.0, they wrote like above " Note that the restricted earth fault protection (cannot be applied for busbars or auto-transformers". Then in version 4.6, they correted it, just...
  2. ngminhtrung

    Why dont use the restricted earth fault protection for autotransfo?

    Hi everyone, I'm reading the technical manual of numerical relay (SIPROTECT 7UT6), and they say that" Note that the restricted earth fault protection (cannot be applied for busbars or auto-transformers". Someone could tell me the reason?
  3. ngminhtrung

    Transmission Line Calculator

    http://www.circuitsage.com/ I don't know exactly what you want, but maybe some (free / sharware) softwares on the page above may help you.

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