7SR11 & 7SR12 Installation Guide
©2017 Siemens Protection Devices Limited Chapter 5 Page 3 of 32
Contents
Section 1: Installation ............................................................................................................................................... 5
1.1 Packaging ............................................................................................................................................... 5
1.2 Unpacking, Storage and Handling .......................................................................................................... 5
1.3 Recommended Mounting Position .......................................................................................................... 5
1.4 Wiring ...................................................................................................................................................... 5
1.5 Earthing ................................................................................................................................................... 6
1.6 Ancillary Equipment ................................................................................................................................ 6
1.7 Disposal .................................................................................................................................................. 6
Section 2: Equipment Operating Conditions ............................................................................................................ 7
2.1 Current Transformer Circuits ................................................................................................................... 7
2.2 External Resistors ................................................................................................................................... 7
2.3 Front Cover ............................................................................................................................................. 7
Section 3: Dimensions and Panel Fixings ................................................................................................................ 8
3.1 Relay Dimensions and Weight ................................................................................................................ 8
3.2 Fixings................................................................................................................................................... 10
3.2.1 Crimps .................................................................................................................................... 10
3.2.2 Panel Fixings .......................................................................................................................... 10
Section 4: Rear Terminal Drawings ....................................................................................................................... 11
4.1 Case...................................................................................................................................................... 11
Section 5: Connection/Wiring/Diagrams ................................................................................................................ 13
5.1 Wiring Diagram: 7SR1101 EF Relay with 3BI & 5BO ........................................................................... 13
5.2 Wiring Diagram: 7SR1102 OC/EF Relay with 3BI & 5BO ..................................................................... 14
5.3 Wiring Diagram: 7SR1103 OC/EF Relay with 6 BI & 8BO .................................................................... 15
5.4 Wiring Diagram: 7SR1107 OC/EF Relay with 4 BI & 8BO .................................................................... 16
5.5 Wiring Diagram: 7SR1204 Directional EF Relay with 3BI & 5BO .......................................................... 17
5.6 Wiring Diagram: 7SR1205 Directional OC/EF Relay with 3BI & 5BO ................................................... 18
5.7 Wiring Diagram: 7SR1206 Directional OC/EF Relay with 6BI & 8BO ................................................... 19
5.8 Wiring Diagram: 7SR1208 Directional OC/EF Relay with 4BI & 8BO ................................................... 20
5.9 Current Transformer Configurations ..................................................................................................... 21
5.10 Voltage Transformer Configurations ..................................................................................................... 27
Section 6: Data Comms Connections .................................................................................................................... 28
6.1 RS485 Connection ................................................................................................................................ 28
6.2 Additional (Optional) Ethernet Connection for IEC 61850 ..................................................................... 29
6.3 Ethernet Network Redundancy IEC 61850 ........................................................................................... 30
6.3.1 RSTP – Rapid Spanning Tree Protocol .................................................................................. 30
6.3.2 PRP – Parallel Redundancy Protocol ..................................................................................... 31
6.3.3 HSR – High Availability Seamless Redundancy Protocol ....................................................... 32
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