ABB RED615 Technical Manual page 16

Table of contents
10
Function block......................................................................423
Functionality.........................................................................423
Operation principle...............................................................423
Application............................................................................427
Signals..................................................................................430
Settings................................................................................430
Monitored data.....................................................................431
Technical data......................................................................431
High-impedance-based restricted earth-fault protection
HREFPDIF.................................................................................431
Identification.........................................................................431
Function block......................................................................432
Functionality.........................................................................432
Operation principle...............................................................432
Application............................................................................433
The measuring configuration................................................436
Recommendations for current transformers ........................437
Setting examples..................................................................441
Signals..................................................................................444
Settings................................................................................445
Monitored data.....................................................................445
Technical data......................................................................445
Unbalance protection......................................................................446
Negative-sequence overcurrent protection NSPTOC................446
Identification.........................................................................446
Function block......................................................................446
Functionality.........................................................................446
Operation principle...............................................................447
Application............................................................................449
Signals..................................................................................449
Settings................................................................................450
Monitored data.....................................................................451
Technical data......................................................................451
Technical revision history.....................................................451
Phase discontinuity protection PDNSPTOC..............................452
Identification.........................................................................452
Function block......................................................................452
Functionality.........................................................................452
Operation principle...............................................................452
Application............................................................................454
Signals..................................................................................455
Settings................................................................................455
Monitored data.....................................................................456
615 series
Technical Manual