The zero sequence scheme, related to the ground fault, looks different in 2 important references. In the book "Symmetrical components for power systems engineering" by J.L. Blackburn page 54, figure 4.9 f) the scheme is as follows:
However, in the IEC 60909-4 standard, page 12, table 1, 1a)...
Hello,I am an inexperienced protection ingineer.
I have I have been looking for the ABB Switchgear manual , but I have not found it in the net in .pdf format.
Thanks a lot.