Siemens 7SG11 Manual page 58

2.9.4 Hot (Live) Line Working ......................................................................................................44
2.10 Trip Circuit Supervision....................................................................................................................45
2.11 Status inputs and Relay Outputs ......................................................................................................45
2.12 Communications..............................................................................................................................47
2.13 Data Storage ...................................................................................................................................47
2.13.1 Event Storage ....................................................................................................................47
2.13.2 Fault Data Record ..............................................................................................................47
2.13.3 Waveform (Disturbance) Records .......................................................................................48
2.13.4 Maximum Demand Function ...............................................................................................49
2.14 Maintenance....................................................................................................................................50
2.14.1 Circuit Breaker Operations..................................................................................................50
2.14.2 Output Relay Test ..............................................................................................................51
2.14.3 Internal Supervision............................................................................................................52
2.15 Linesman Mode...............................................................................................................................52
Section 3: Application Notes .........................................................................................................................54
3.1 Selection of Characteristics..............................................................................................................54
3.1.1 Reset Delay .......................................................................................................................54
3.2 Directional Protection.......................................................................................................................54
3.2.1 Parallel or Ring Feeder Protection ......................................................................................54
3.3 Sensitive Earth-fault Protection ........................................................................................................55
3.4 Blocking Schemes ...........................................................................................................................56
Busbar Zone Protection ...................................................................................................................57
3.5 High Impedance Restricted Earth-fault Protection .............................................................................58
3.6 Circuit Breaker Fail Protection..........................................................................................................60
3.7 Auto-reclose Applications.................................................................................................................60
3.7.1 Reclose Time Setting .........................................................................................................60
3.7.2 Reclaim Time Setting .........................................................................................................60
3.7.3 Shots to Lockout Setting.....................................................................................................61
3.7.4 Sequence Auto-reclosing....................................................................................................61
3.8 Trip Circuit Supervision....................................................................................................................61
3.9 Output Relays..................................................................................................................................62
3.10 Post-fault Analysis ...........................................................................................................................62
3.10.1 Events, Fault and Waveform Records .................................................................................62
3.10.2 Fault triggers......................................................................................................................62
3.10.3 Waveform triggers..............................................................................................................63
3.10.4 ReyDisp (IEC 60870-5-103)................................................................................................63
Section 4: Communication Interface .............................................................................................................64
4.1 Introduction .....................................................................................................................................64
4.1.1 Comms Protocol Setting.....................................................................................................64
4.2 IEC 60870-5-103 .............................................................................................................................64
4.2.1 Physical Connection...........................................................................................................64
4.2.2 Medium..............................................................................................................................64
4.2.3 Recommended cable..........................................................................................................64
4.2.4 Network Topology ..............................................................................................................65
4.2.5 Settings .............................................................................................................................65
4.2.6 IEC Class II Measurands....................................................................................................65
4.2.7 IEC Class II Update period .................................................................................................65
4.2.8 IEC Class II scaling ............................................................................................................65
4.2.9 Baud Rate..........................................................................................................................65
4.2.10 Comms Parity ....................................................................................................................65
4.2.11 Relay Address....................................................................................................................65
4.2.12 Line Idle.............................................................................................................................65
4.2.13 Data Echo..........................................................................................................................66
4.2.14 Modems.............................................................................................................................66
4.2.15 Connecting a Modem to the Relay(s) ..................................................................................66
4.2.16 Setting the Remote Modem ................................................................................................66
4.2.17 Connecting to the Remote Modem......................................................................................67
4.3 Introduction - Modbus RTU..............................................................................................................68
4.3.1 Medium..............................................................................................................................68
4.3.2 Recommended cable..........................................................................................................68
4.3.3 Network Topology ..............................................................................................................68
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7SG11 Argus Technical Reference
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