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  1. singuru

    240kV transmission line protection

    I mean POTT: Permissive over-reaching Transfer Trip PUTT: Permissive under-reaching Transfer Trip DCB: Directional Comparison Blocking DCUB: Directional Comparison Unblocking
  2. singuru

    240kV transmission line protection

    I am working on a 240/144kV transmission line protection, in a Utility, Canada. I am fairly a new protection engineer. The philosophy is as follows: They are using POTT schemes with the exception of PUTT at generation sites. There's evan a PUTT on one end and POTT on the other. For short...

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