Search results for query: *

I think there is some mixed up about the C800 10P20. The C800 relay class is based on ANSI/IEEE while the 10P20 protection class (with the burden defined, e.g., 10va 10P20, 15va 10P20, etc) is based on IEC standard. Metering class in ANSI is defined as, e.g., 0.6B0.9, 0.3B1.8,etc. While the...

thanks again to all the postings! gives me valuable info.

how are the CTs mounted installed in the isophase bus ducts? my thought is to provide a transition compartment where the CTs are mounted thru the bus. i am not in practice with MV power generation so I cannot visualize this situation. thanks for your comments.

thanks to all.

how can you dimension the proper rating of the CT given the characteristics of a relay, say the GE Multilin SR750?

there are cts that have both relaying and metering class (e.g., C100, 0.3B1.8 or IEC rated 30va 5P20 protection class and 15 va CL0.5 metering class). some are approved for revenue metering. with today's electronic relays and meters having low burdens, high relaying accuracy/burden are not that...

i doubt if you can source this Ex-n certified current transformer. i am not aware of any manufacturer doing this as this is a very specialized design and consequently, if there is a manufacturer that can do this, it could be at a very high price. one possible solution that you might consider is...

thanks to all. i guess i need to read more about transformer differential protection in particular. busbar - you are right. as for myself, i have never been seen any differential protection for this not so large power transformer - 2.5MVA. anyway, this is just an example that i have thought of...

hi to everyone. this is my first post. and i have found the posts in this forum very informative. i am trying to learn more about differential protection in general and i have not read much in depth about this. one particular question that i have in mind for now is about how to dimension the...