At 30:20, are you sure that you need to have an interposing CT of YNd5??? I think it is wrong. If the Differential relay is inserted at the position shown as in the diagram, you need an ICT of YNd1 and not YNd5 to cancel out the phase shift of +30 degrees introduced on the secondary winding of the transformer.!! Correct me if I am wrong please!!
Thanks for sharing such a informative vedio
At 30:20, are you sure that you need to have an interposing CT of YNd5??? I think it is wrong. If the Differential relay is inserted at the position shown as in the diagram, you need an ICT of YNd1 and not YNd5 to cancel out the phase shift of +30 degrees introduced on the secondary winding of the transformer.!! Correct me if I am wrong please!!
excuse sir, can i get manual book from this presentation? thanks