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ABB Relay CT Requirements Overview by goalex is a document available to read on EtoBox.

This document outlines requirements for current transformers (CTs) used with ABB relays. It discusses CT classification, conditions tested, fault current levels, and specific rated secondary EMF requirements for different protection functions in ABB line distance, line differential, transformer, busbar, and bay control relays. Requirements are provided according to IEC 60044 and other standards. CTs must correctly reproduce current for a minimum time before saturating to ensure correct relay operation under

Author

goalex

Language

EN