ABB RELION 630 Series Applications Manual page 9

REM630
Application Manual
Non-directional earth-fault protection EFxPTOC....................54
Positive-sequence overvoltage protection PSPTOV.............. 54
Positive-sequence undervoltage protection PSPTUV............ 54
Negative-sequence overvoltage protection NSPTOV............ 54
Circuit-breaker failure protection CCBRBRF..........................55
Tripping logic TRPPTRC........................................................ 55
Combined operate and start alarm signal.............................. 56
Combined restart inhibit and restart enable signal................. 56
Supervision functions.................................................................. 57
Trip circuit supervision TCSSCBR......................................... 57
Fuse failure and current circuit supervision SEQRFUF,
CCRDIF..................................................................................57
Circuit-breaker condition monitoring SSCBR......................... 57
Measurement and analog recording functions............................ 58
Binary recording and LED configuration......................................59
Section 4 Requirements for measurement transformers................63
Current transformers........................................................................ 63
Current transformer requirements for overcurrent protection...... 63
Current transformer accuracy class and accuracy limit
factor...................................................................................... 63
Non-directional overcurrent protection................................... 64
Example for non-directional overcurrent protection................65
Section 5 Glossary......................................................................... 67
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