ABB REG650 Technical Manual page 16

Table of contents
10
Signals.............................................................................................283
Settings............................................................................................284
Monitored data.................................................................................285
Operation principle..........................................................................285
Technical data.................................................................................290
Section 10 Frequency protection.........................................................291
Underfrequency protection SAPTUF (81).............................................291
Identification....................................................................................291
Functionality....................................................................................291
Function block.................................................................................291
Signals.............................................................................................292
Settings............................................................................................292
Monitored data.................................................................................292
Operation principle..........................................................................292
Measurement principle...............................................................293
Time delay..................................................................................293
Blocking......................................................................................293
Design........................................................................................294
Technical data.................................................................................294
Overfrequency protection SAPTOF (81)...............................................295
Identification....................................................................................295
Functionality....................................................................................295
Function block.................................................................................295
Signals.............................................................................................295
Settings............................................................................................296
Monitored data.................................................................................296
Operation principle..........................................................................296
Measurement principle...............................................................296
Time delay..................................................................................297
Blocking......................................................................................297
Design........................................................................................297
Technical data.................................................................................298
Rate-of-change frequency protection SAPFRC (81)............................298
Identification....................................................................................299
Functionality....................................................................................299
Function block.................................................................................299
Signals.............................................................................................299
Settings............................................................................................300
Operation principle..........................................................................300
Technical Manual