Specifications

7SR242 Duobias Installation Guide
Contents
Document Release History....................................................................................................................1
Software Revision History.....................................................................................................................1
Contents ..................................................................................................................................................2
List of Figures.........................................................................................................................................3
Section 1: Installation ............................................................................................................................4
1.1 Unpacking, Storage and Handling ............................................................................................4
1.2 Recommended Mounting Position............................................................................................4
1.3 Wiring ........................................................................................................................................4
1.4 Earthing.....................................................................................................................................4
1.5 Ancillary Equipment ..................................................................................................................4
Section 2: Equipment Operating Conditions.......................................................................................5
2.1 Current Transformer Circuits ....................................................................................................5
2.2 External Resistors.....................................................................................................................5
2.3 Fibre Optic Communication ......................................................................................................5
2.4 Front Cover ...............................................................................................................................5
Section 3: Dimensions and Panel Fixings ...........................................................................................6
3.1 Relay Dimensions and Weight..................................................................................................6
3.2 Fixings.......................................................................................................................................7
3.2.1 Crimps..........................................................................................................................7
3.2.2 Panel Fixings................................................................................................................7
Section 4: Rear Terminal Drawings......................................................................................................8
4.1 E8 CASE ...................................................................................................................................8
4.2 E10 CASE .................................................................................................................................9
Section 5: Connection/Wiring/Diagrams............................................................................................10
5.1 Wiring Diagram: 7SR242 Relay..............................................................................................10
Section 6: Data Comms Connections ................................................................................................11
6.1 RS485 Connection..................................................................................................................11
6.2 IRIG-B Connections ................................................................................................................11
6.3 Fibre Optic Connections .........................................................................................................12
Section 7: Connection Diagrams........................................................................................................13
7.1 Typical Connection: 7SR242 ..................................................................................................13
©2010 Siemens Protection Devices Limited Chapter 5 Page 2 of 13