Hi all,
I'm trying to calculate the Accuracy Limit Factor for some protection CTs but the ratio is specified as, for example, “5P20 extd. 1000%”… What does the “extd. 1000%” mean?
My first guess would be extending the 5% accuracy to 20x1000% = 200xIn under some condition, perhaps a specified burden.
The switchgear suppler is trying to help but is not desparately quick.
Thanks