ABB RER615 - Page 16

10.3.4 Operation principle............................................................................................................ 709
10.3.5 Recorded data.......................................................................................................................717
10.3.6 Application............................................................................................................................719
10.3.7 Signals....................................................................................................................................721
10.3.8 Settings................................................................................................................................. 721
10.3.9 Monitored data.................................................................................................................... 723
10.3.10 Technical data ..................................................................................................................... 727
10.4 Voltage unbalance VSQVUB...............................................................................................................728
10.4.1 Identification........................................................................................................................728
10.4.2 Function block..................................................................................................................... 728
10.4.3 Functionality.........................................................................................................................728
10.4.4 Operation principle.............................................................................................................729
10.4.5 Application............................................................................................................................733
10.4.6 Signals................................................................................................................................... 734
10.4.7 Settings.................................................................................................................................735
10.4.8 Monitored data....................................................................................................................736
10.4.9 Technical data ..................................................................................................................... 738
11 General function block features..........................................................739
11.1 Definite time characteristics............................................................................................................ 739
11.1.1 Definite time operation..................................................................................................... 739
11.2 Current based inverse definite minimum time characteristics................................................. 743
11.2.1 IDMT curves for overcurrent protection......................................................................... 743
11.2.2 Recloser inverse-time characteristics.............................................................................764
11.2.3 Reset in inverse-time modes............................................................................................805
11.2.4 Inverse-timer freezing........................................................................................................ 815
11.3 Voltage based inverse definite minimum time characteristics................................................. 815
11.3.1 IDMT curves for overvoltage protection.........................................................................815
11.3.2 IDMT curves for undervoltage protection......................................................................822
11.4 Frequency measurement and protection ......................................................................................826
11.5 Measurement modes..........................................................................................................................827
11.6 Calculated measurements.................................................................................................................828
12 Requirements for measurement transformers..................................831
12.1 Current transformers..........................................................................................................................831
12.1.1 Current transformer requirements for overcurrent protection................................. 831
13 Protection relay's physical connections.............................................835
13.1 Module slot numbering......................................................................................................................835
13.2 Protective earth connections .......................................................................................................... 835
13.3 Binary and analog connections........................................................................................................836
13.4 Communication connections........................................................................................................... 836
Contents
16 REC615 & RER615
Technical Manual