Specifications

7SR242 Duobias Performance Specification
©2010 Siemens Protection Devices Limited Chapter 3 - Page 2 of 45
Contents
Document Release History....................................................................................................................1
Software Revision History.....................................................................................................................1
Contents ..................................................................................................................................................2
Section 1: Common Functions .............................................................................................................5
1.1 General .....................................................................................................................................5
1.1.1 CE Conformity..............................................................................................................5
1.1.2 Reference.....................................................................................................................5
1.1.3 Dimensions and Weights .............................................................................................5
1.2 Energising Quantities................................................................................................................6
1.2.1 Auxiliary Power Supply ................................................................................................6
1.2.2 AC Current ...................................................................................................................6
1.2.3 AC Voltage ...................................................................................................................7
1.2.4 Binary (Digital) Outputs................................................................................................7
1.2.5 Binary (Digital) Inputs...................................................................................................8
1.3 Functional Performance..........................................................................................................10
1.3.1 Instrumentation ..........................................................................................................10
1.3.2 USB Data Communication Interface ..........................................................................10
1.3.3 Fibre optic Data Communication Interface.................................................................10
1.3.4 RS485 Data Communication Interface ......................................................................10
1.3.5 Real Time Clock.........................................................................................................10
1.4 Environmental Performance ...................................................................................................11
1.4.1 General.......................................................................................................................11
1.4.2 Emissions...................................................................................................................11
1.4.3 Immunity.....................................................................................................................12
1.4.4 Mechanical .................................................................................................................13
Section 2: Protection Functions .........................................................................................................14
2.1 24 Over Fluxing.......................................................................................................................14
2.1.1 Reference (24DT) ......................................................................................................14
2.1.2 Operate and Reset Level (24DT)...............................................................................14
2.1.3 Operate and Reset Time (24DT) ...............................................................................14
2.1.4 Reference (24IT) ........................................................................................................14
2.1.5 Operate and Reset Level (24IT) ................................................................................14
2.1.6 Operate and Reset Time (24IT) .................................................................................15
27/59 Under/Over Voltage..............................................................................................................16
2.1.7 Reference...................................................................................................................16
2.1.8 Operate and Reset Level ...........................................................................................16
2.1.9 Operate and Reset Time............................................................................................16
2.2 37,37G Undercurrent ..............................................................................................................17
2.2.1 Reference...................................................................................................................17
2.2.2 Operate and Reset Level ...........................................................................................17
2.2.3 Operate and Reset Time............................................................................................17
2.3 46BC Open Circuit..................................................................................................................18
2.3.1 Reference...................................................................................................................18
2.3.2 Operate and Reset Level ...........................................................................................18
2.3.3 Operate and Reset Time............................................................................................18
2.4 46NPS Negative Phase Sequence Overcurrent.....................................................................19
2.4.1 Reference (46DT) ......................................................................................................19
2.4.2 Operate and Reset Level (46DT)...............................................................................19
2.4.3 Operate and Reset Time (46DT) ...............................................................................19
2.4.4 Reference (46IT) ........................................................................................................19