Q4. A 3-phase, 11kV/33 kV, star-delta connected power transformer is protected by differential protection. The CTs on the LV side have a current ratio of 400/5. Develop the circuit diagram of differential protection scheme showing clearly the connections of the protective transformer windings and their corresponding CTs. Also determine the ratio of CTs on the HV side of transformer.
Q4. A 3-phase, 11kV/33 kV, star-delta connected power transformer is protected by differential protection. The CTs on the LV side have a current ratio of 400/5. Develop the circuit diagram of differential protection scheme showing clearly the connections of the protective transformer windings and their corresponding CTs. Also determine the ratio of CTs on the HV side of transformer.
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.51P: The ratings of a three-phase three-winding transformer are Primary(1): Y connected 66kV,15MVA...
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