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  • Users: Brown4u
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  1. Brown4u

    How to test a restricted earth fault scheme with high impedance earthing reactor

    The REF protection for our 66kV/11kV transformer (25/37.5 MVA; %Z = 9.32) operated for a fault outside of its zone and suspect the CT polarity is wired incorrectly. The HV side is star. The LV winding (11kV) is delta and is grounded through an earthing reactor and the neutral CT is located in...

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