
2.2.2 Overvoltage Protection 59........................................................................................... 38
2.2.3 Undervoltage Protection 27......................................................................................... 39
2.2.4 Setting Notes...............................................................................................................41
2.2.5 Settings.......................................................................................................................44
2.2.6 Information List...........................................................................................................45
2.3 Frequency Protection 81 O/U.............................................................................................46
2.3.1 Functional Description.................................................................................................46
2.3.2 Setting Notes...............................................................................................................47
2.3.3 Settings.......................................................................................................................48
2.3.4 Information List...........................................................................................................49
2.4 Load Restoration............................................................................................................... 50
2.4.1 Functional Description.................................................................................................50
2.4.2 Setting Notes...............................................................................................................54
2.4.3 Settings.......................................................................................................................57
2.4.4 Information List...........................................................................................................60
2.5 Supervision Functions....................................................................................................... 61
2.5.1 Measurement Supervision........................................................................................... 61
2.5.1.1 General..................................................................................................................61
2.5.1.2 Hardware Monitoring ............................................................................................ 61
2.5.1.3 Software Monitoring ............................................................................................. 61
2.5.1.4 Monitoring of the Transformer Circuits................................................................... 62
2.5.1.5 Broken Wire Monitoring of Voltage Transformer Circuits......................................... 63
2.5.1.6 Setting Notes......................................................................................................... 64
2.5.1.7 Settings................................................................................................................. 64
2.5.1.8 Information List..................................................................................................... 65
2.5.2 Trip Circuit Supervision 74TC....................................................................................... 65
2.5.2.1 Functional Description........................................................................................... 65
2.5.2.2 Setting Notes......................................................................................................... 68
2.5.2.3 Settings................................................................................................................. 68
2.5.2.4 Information List..................................................................................................... 69
2.5.3 Malfunction Responses of the Monitoring Functions.................................................... 69
2.5.3.1 Functional Description........................................................................................... 69
2.6 Flexible Protection Functions.............................................................................................71
2.6.1 Functional Description.................................................................................................71
2.6.2 Setting Notes...............................................................................................................74
2.6.3 Settings.......................................................................................................................77
2.6.4 Information List...........................................................................................................78
2.7 Synchrocheck................................................................................................................... 80
2.7.1 Allgemeines................................................................................................................ 80
2.7.2 Functional Sequence................................................................................................... 81
2.7.3 De-energized Switching...............................................................................................82
2.7.4 Direct Command / Blocking..........................................................................................83
2.7.5 Interaction with Control and External Control...............................................................84
2.7.6 Setting Notes...............................................................................................................84
2.7.7 Settings.......................................................................................................................88
2.7.8 Information List...........................................................................................................89
2.8 24 Overexcit. Protection (Volt/Hertz)................................................................................. 91
2.8.1 Functional Description.................................................................................................91
2.8.2 Setting Notes...............................................................................................................93
Table of Contents
10 SIPROTEC 4, 7RW80, Manual
C53000-G1140-C233-4, Edition 07.2018