ABB Relion Technical Manual page 16

Table of contents
10
Time delay.................................................................................. 297
Blocking...................................................................................... 297
Design........................................................................................ 297
Technical data................................................................................. 299
Overexcitation protection OEXPVPH (24)............................................ 299
Identification.................................................................................... 299
Functionality.................................................................................... 299
Function block................................................................................. 300
Signals.............................................................................................300
Settings............................................................................................300
Monitored data.................................................................................301
Operation principle.......................................................................... 301
Measured voltage....................................................................... 304
Operate time of the overexcitation protection.............................304
Cooling....................................................................................... 307
Overexcitation protection function measurands......................... 307
Overexcitation alarm...................................................................308
Logic diagram............................................................................. 308
Technical data................................................................................. 308
100% Stator ground fault protection, 3rd harmonic based STEFPHIZ
(59THD)................................................................................................ 309
Identification.................................................................................... 309
Functionality.................................................................................... 309
Function block................................................................................. 311
Signals.............................................................................................311
Settings............................................................................................312
Monitored data.................................................................................313
Operation principle.......................................................................... 313
Technical data................................................................................. 318
Section 10 Frequency protection.........................................................319
Underfrequency protection SAPTUF (81).............................................319
Identification.................................................................................... 319
Functionality.................................................................................... 319
Function block................................................................................. 319
Signals.............................................................................................320
Settings............................................................................................320
Monitored data.................................................................................320
Operation principle.......................................................................... 320
Measurement principle............................................................... 321
Technical manual