ABB Relion 630 Series, Applications Manual

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Circuit-breaker control function.............................................. 29
Earthing switch control function..............................................29
Neutral grounding resistor switch control function..................29
Protection functions.....................................................................31
Stabilized three-phase differential protection MPDIF............. 31
Thermal overload protection T2PTTR.................................... 32
Non-directional overcurrent protection PHxPTOC................. 32
Machine negative-sequence overcurrent protection
MNSPTOC............................................................................. 32
Voltage-dependent overcurrent protection PHPVOC.............34
Directional earth-fault protection DEFxPDEF.........................34
Three-phase residual overvoltage protection ROVPTOV...... 35
Three-phase overvoltage protection PHPTOV.......................36
Three-phase undervoltage protection PHPTUV.....................36
Overfrequency protection DAPTOF....................................... 37
Underfrequency protection DAPTUF......................................38
Frequency gradient protection DAPFRC................................38
Underexcitation protection UEXPDIS.....................................39
Reverse power/directional overpower protection
DOPPDPR..............................................................................40
Underpower protection DUPPDPR........................................ 41
Circuit-breaker failure protection CCBRBRF..........................42
Tripping logic TRPPTRC........................................................ 42
Combined operate and start alarm signal.............................. 43
Other outputs and alarm signal.............................................. 44
Supervision functions.................................................................. 44
Trip circuit supervision TCSSCBR......................................... 44
Fuse failure supervision SEQRFUF....................................... 44
Circuit-breaker condition monitoring SSCBR......................... 44
Measurement and analog recording functions............................ 45
Binary recording and LED configuration......................................47
Section 4 Requirements for measurement transformers................51
Current transformers........................................................................ 51
Current transformer requirements for overcurrent protection......51
Current transformer accuracy class and accuracy limit
factor...................................................................................... 51
Non-directional overcurrent protection................................... 52
Example for non-directional overcurrent protection................53
Section 5 Glossary......................................................................... 55
Table of contents
2 REG630
Application Manual