ABB Relion 670 series - Document Symbols and Conventions

Service settings for transceiver 21–219................................. 93
Earthing....................................................................................... 93
Communication structure for laboratory testing...........................94
Communication status and fault tracing........................................... 94
Communication status on the line differential protection IED...... 94
Detecting communication faults on transceiver 21-216...............98
Detecting communication faults on transceiver 21-219...............99
Detecting communication faults through loop-back testing......... 99
Section 6 Appendix...................................................................... 101
Sample specification of communication requirements................... 101
Table of contents
Communication set-up 670/650 series 2.2 3
Application Guide