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  • Users: ypo
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  1. ypo

    CT application for Generator Differential Protection

    In addition: calculated Vk should be the point before saturation of yor CT's excitation curve!
  2. ypo

    CT application for Generator Differential Protection

    You should consider first the Differential protection relay manufacturer recommendations and requirements for CT's characteristics. Your understanding about the accuracy class for relaying is correct. Your use of CT,s sets C400 and C800 is strange. How do you explain it? Common practice for CT's...
  3. ypo

    Zero-sequence capacitance of power transformer

    rbulsara, I need it to size the Neutral grounding transformer and resistor. jbartos, thank you!
  4. ypo

    Zero-sequence capacitance of power transformer

    To make the ground fault calculations for our system I need the zero-sequence capacitance per phase of the power transformer. The power transformer is 3 MVA, step-up, D/Y, 4.16kv/25kv, impedance 5%. Us the manufacturer can not give me this value (this range of transformers being to small to...

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