Siemens Argus 8 7SG11 Manual page 51

Contents
1 Introduction..........................................................................................................................................2
2 General Information.............................................................................................................................2
2.1 Relay External Connections ........................................................................................................2
2.2 Voltage Blocking Element............................................................................................................2
2.3 Output Contact Delay Time .........................................................................................................3
2.4 Setting DTL Times.......................................................................................................................3
2.5 Voltage Element Hysteresis ........................................................................................................4
2.6 Trip Circuit Supervision ...............................................................................................................4
3 Application of Functions ......................................................................................................................4
3.1 Undervoltage Protection ..............................................................................................................4
3.2 Overvoltage Protection ................................................................................................................5
3.3 Neutral Voltage Displacement Protection....................................................................................5
3.4 NPS Overvoltage Protection........................................................................................................6
3.5 Frequency Protection ..................................................................................................................6
Table of Figures
Figure 1 - Trip Circuit Supervision Scheme........................................................................................ 8
Figure 2 - 2 Phase-Phase 'V' Connection .......................................................................................... 9
Figure 3 - 2 Phase-Phase Connection ............................................................................................. 10
Figure 4 - Phase-Phase with Residual Voltage Connection............................................................. 11
Figure 5 - 2 Systems Connection (Ph-N).......................................................................................... 12
Figure 6 - 3 Phase-Neutral Connection ............................................................................................ 13
Figure 7 - 2 Phase-Phase with Residual Voltage Connection.......................................................... 14
Figure 8 - 3 Phase-Phase Connection ............................................................................................. 15
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7SG11 Argus 8 Applications Guide
Chapter 5 Page 1 of 16