I have seen the discussion in the link. I am still not sure about the grounding of a phase and also I am thinking of using a 10kVA portable generator with a floating ground to inject sufficient current into the LV winding of the earthing reactor. zero sequence impedance of 47.6 ohms and using a...
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...
