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4.3.4
Settings .............................................................................................................................69
4.3.5
Comms Protocol.................................................................................................................69
4.3.6
Baud Rate..........................................................................................................................69
4.3.7
Comms Parity ....................................................................................................................69
4.3.8
Relay Address....................................................................................................................69
4.3.9
Line Idle.............................................................................................................................69
4.3.10
Data Echo..........................................................................................................................69
4.3.11
Glossary ............................................................................................................................70
List of Figures
Figure 1.5-1 IDMTL Curves (Time Multiplier=1) .................................................................................16
Figure 1.5-2 Overcurrent Starter Operate Time to Contact.................................................................17
Figure 1.5-3 Instantaneous Highset Operate Time to Contact............................................................17
Figure 1.5-4 Instantaneous Lowset Operate Time to Contact.............................................................17
Figure 1.5-5 Sensitive Earth-fault Frequency Response (Is = 5 mA) ..................................................18
Figure 1.5-6 Sensitive Earth-fault Operate Time to Contact ...............................................................18
Figure 1.5-7 Directional Timing Characteristic ...................................................................................19
Figure 2.1-1 Overview of Argus Relay Protection Functions ..............................................................20
Figure 2.3-1 Functional Diagram – Characteristic Phase-fault Overcurrent Element...........................27
Figure 2.3-2 Functional Diagram – Characteristic Earth-fault Overcurrent Element ............................27
Figure 2.3-3 Functional Diagram – Instantaneous Phase-fault Overcurrent Elements ........................28
Figure 2.3-4 Functional Diagram – Instantaneous Earth-fault Overcurrent Elements..........................28
Figure 2.4-1 Functional Diagram – Sensitive Earth-fault/Restricted Earth-fault Elements ...................30
Figure 2.5-1 Functional Diagram – Circuit Breaker Fail......................................................................32
Figure 2.5-2 Functional Diagram – Current Transformer Fail .............................................................33
Figure 2.7-1 Functional Diagram – Phase-fault Directional Element...................................................35
Figure 2.7-2 Functional Diagram – Earth-fault Directional Element ....................................................35
Figure 2.8-1 Functional Diagram – Undervoltage/Overvoltage Element .............................................37
Figure 2.11-1
Status Input Logic ..................................................................................................46
Figure 2.11-2
Output Relay Logic ................................................................................................46
Figure 3.2-1 Parallel Feeder Protection .............................................................................................55
Figure 3.4-1 Blocking scheme giving fast fault clearance...................................................................56
Figure 3.4-2 Busbar Zone Protection with Circuit Breaker Fail using Non-directional
Relays. For use on Single-source Feed Networks..........................................................57
Figure 3.4-3 Busbar Zone Protection with Circuit Breaker Fail Employing Bi-Directional
relays. For use on fully Interconnected Networks with Remote Supply
Sources.........................................................................................................................58
Figure 3.5-1 Balanced and Restricted Earth-fault protection of Transformers.....................................59
Figure 3.5-2 Restricted Earth-fault Secondary Circuit ........................................................................59
Figure 3.5-3 Composite Overcurrent and Restricted Earth-fault Protection ........................................59
Figure 3.8-1 Engineering Recommendations S.15 H6 Trip Circuit Supervision scheme .....................61
Figure 3.8-2 Engineering Recommendations S.15 H5 Trip Circuit Supervision scheme .....................62
Figure 4.2-1 Communication to Argus Relay using Sigma 4 (Local Connection) ................................67
Figure 4.2-2 Communication to Argus Relay using Sigma 4 and Modem ...........................................67
Figure 4.2-3 Communication to Multiple Argus Relays from Control System and Laptop
with Sigma 3 and Fibre-optic Ring Network ...................................................................67
Figure 4.2-4 Communication to Multiple Argus Relays from Control System and Laptop
with Sigma 1 and Fibre-optic Star Network ....................................................................68
Figure 4.3-1 Communication to Argus Relay using Sigma 4 (Local Connection) ................................69
Figure 4.3-2 Communication to Multiple Argus Relays from Control System and Laptop
with Sigma 1 and Fibre-optic Star Network ....................................................................70
Figure 4.3-3 Communication to Argus Relay using RS485 – RS232 converter (Local
Connection)...................................................................................................................70
Figure 4.3-4 Communication to Argus Relay using RS485/RS232 converter (Multidrop
Connection)...................................................................................................................70
List of Tables
Table 2-1
Overview of Functional Description Sections ...............................................................................21
Table 2-2
Settings Group Settings..............................................................................................................22
©2013 Siemens Protection Devices Limited
7SG11 Argus Technical Reference
P20007 Page 4 of 71
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