ABB RELION REX640 Technical Manual page 27

REX640
Technical Manual
Recommendations for current transformers ........................725
Example calculations for high-impedance differential
protection..............................................................................730
Signals..................................................................................733
Settings................................................................................ 733
Monitored data..................................................................... 734
Technical data...................................................................... 734
Unbalance protection......................................................................735
Negative-sequence overcurrent protection NSPTOC................735
Identification......................................................................... 735
Function block...................................................................... 735
Functionality......................................................................... 735
Analog channel configuration............................................... 735
Operation principle............................................................... 736
Application............................................................................738
Signals..................................................................................738
Settings................................................................................ 739
Monitored data..................................................................... 740
Technical data...................................................................... 740
Directional negative-sequence overcurrent protection
DNSPDOC.................................................................................741
Identification......................................................................... 741
Function block...................................................................... 741
Functionality......................................................................... 741
Analog channel configuration............................................... 741
Operation principle............................................................... 742
Directional overcurrent characteristics................................. 744
Application............................................................................746
Signals..................................................................................746
Settings................................................................................ 746
Monitored data..................................................................... 747
Technical data...................................................................... 748
Phase discontinuity protection PDNSPTOC..............................748
Identification......................................................................... 748
Function block...................................................................... 749
Functionality......................................................................... 749
Analog channel configuration............................................... 749
Operation principle............................................................... 749
Application............................................................................751
Signals..................................................................................752
Settings................................................................................ 752
Monitored data..................................................................... 753
Technical data...................................................................... 753
Phase reversal protection PREVPTOC..................................... 753
Table of contents
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