Signals.............................................................................................300Settings............................................................................................301Monitored data.................................................................................302Operation principle.......................................................................... 302Measurement principle............................................................... 303Time delay.................................................................................. 303Blocking...................................................................................... 304Design........................................................................................ 305Technical data................................................................................. 307Two step residual overvoltage protection ROV2PTOV (59N)...............307Identification.................................................................................... 307Functionality.................................................................................... 307Function block................................................................................. 308Signals.............................................................................................308Settings............................................................................................309Monitored data.................................................................................309Operation principle.......................................................................... 309Measurement principle............................................................... 310Time delay.................................................................................. 310Blocking...................................................................................... 310Design........................................................................................ 310Technical data................................................................................. 312Loss of voltage check LOVPTUV (27).................................................. 312Identification.................................................................................... 312Functionality.................................................................................... 312Function block................................................................................. 313Signals.............................................................................................313Settings............................................................................................313Operation principle.......................................................................... 314Technical data................................................................................. 316Section 9 Frequency protection.........................................................317Underfrequency protection SAPTUF (81).............................................317Identification.................................................................................... 317Functionality.................................................................................... 317Function block................................................................................. 317Signals.............................................................................................318Settings............................................................................................318Monitored data.................................................................................318Operation principle.......................................................................... 318Table of contents10Technical manual
