Signals.............................................................................................182Settings............................................................................................183Monitored data.................................................................................183Operation principle.......................................................................... 183Measurement principle............................................................... 184Time delay.................................................................................. 184Blocking...................................................................................... 184Design........................................................................................ 184Technical data................................................................................. 186Loss of voltage check LOVPTUV (27).................................................. 186Identification.................................................................................... 186Functionality.................................................................................... 186Function block................................................................................. 187Signals.............................................................................................187Settings............................................................................................187Operation principle.......................................................................... 188Technical data................................................................................. 190Section 8 Frequency protection.........................................................191Underfrequency protection SAPTUF (81).............................................191Identification.................................................................................... 191Functionality.................................................................................... 191Function block................................................................................. 191Signals.............................................................................................192Settings............................................................................................192Monitored data.................................................................................192Operation principle.......................................................................... 192Measurement principle............................................................... 193Time delay.................................................................................. 194Blocking...................................................................................... 194Design........................................................................................ 194Technical data................................................................................. 194Overfrequency protection SAPTOF (81)...............................................195Identification.................................................................................... 195Functionality.................................................................................... 195Function block................................................................................. 196Signals.............................................................................................196Settings............................................................................................196Monitored data.................................................................................196Operation principle.......................................................................... 197Table of contents7Technical manual
