About this document
Bushing Type CT for 64REF Protection by Abderrahmane Boursas is a document available to read on EtoBox.
Bushing type CTs should be used for the 64REF protection on the neutral point of the transformer to operate correctly. If CTs are placed on the earthing path instead, the 64REF trip setting would need to be higher than the unbalance current, reducing its accuracy. Additionally, a downstream phase-to-neutral fault could cause the 64REF to trip incorrectly. For correct operation of 64REF and 50G protections on a TNC-S earthing system without a neutral bushing CT, the document recommends a configuration placin
- Author
- Abderrahmane Boursas
- Language
- EN