ABB RELION 620 Series Technical Manual page 21

620 series
Technical Manual
Settings................................................................................ 586
Monitored data..................................................................... 587
Technical data...................................................................... 588
Technical revision history..................................................... 588
High-impedance/flux-balance based differential protection
for motors MHZPDIF................................................................. 589
Identification......................................................................... 589
Function block...................................................................... 589
Functionality......................................................................... 589
Operation principle............................................................... 589
Application............................................................................590
Recommendations for current transformers ........................593
Example calculations for high-impedance differential
protection..............................................................................597
Signals..................................................................................600
Settings................................................................................ 600
Monitored data..................................................................... 601
Technical data...................................................................... 601
Unbalance protection......................................................................602
Negative-sequence overcurrent protection NSPTOC................602
Identification......................................................................... 602
Function block...................................................................... 602
Functionality......................................................................... 602
Operation principle............................................................... 602
Application............................................................................604
Signals..................................................................................605
Settings................................................................................ 606
Monitored data..................................................................... 607
Technical data...................................................................... 607
Technical revision history..................................................... 608
Phase discontinuity protection PDNSPTOC..............................608
Identification......................................................................... 608
Function block...................................................................... 608
Functionality......................................................................... 608
Operation principle............................................................... 608
Application............................................................................610
Signals..................................................................................611
Settings................................................................................ 611
Monitored data..................................................................... 612
Technical data...................................................................... 612
Technical revision history..................................................... 613
Phase reversal protection PREVPTOC..................................... 613
Identification......................................................................... 613
Function block...................................................................... 613
Table of contents
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