Siemens 7SR224 Technical Manual page 87

Contents
Section 1: Common Functions ................................................................................................................................. 5
1.1 General ................................................................................................................................................... 5
1.1.1 CE Conformity........................................................................................................................... 5
1.1.2 Reference ................................................................................................................................. 5
1.1.3 Dimensions ............................................................................................................................... 5
1.1.4 Weights ..................................................................................................................................... 6
1.2 Energising Quantities .............................................................................................................................. 7
1.2.1 Auxiliary Power Supply ............................................................................................................. 7
1.2.2 AC Current ................................................................................................................................ 7
1.2.3 AC Voltage................................................................................................................................ 8
1.2.4 Binary (Digital) Outputs ............................................................................................................. 8
1.2.5 Binary (Digital) Inputs................................................................................................................ 9
1.3 Functional Performance ........................................................................................................................ 11
1.3.1 Instrumentation ....................................................................................................................... 11
1.3.2 USB Data Communication Interface ....................................................................................... 11
1.3.3 Fibre optic Data Communication Interface .............................................................................. 11
1.3.4 RS485 Data Communication Interface.................................................................................... 11
1.3.5 Additional RS485 Data Communication Interface ................................................................... 11
1.3.6 RS232 Data Communication Interface.................................................................................... 11
1.3.7 Real Time Clock...................................................................................................................... 11
1.4 Environmental Performance.................................................................................................................. 13
1.4.1 General ................................................................................................................................... 13
1.4.2 Emissions................................................................................................................................ 13
1.4.3 Immunity ................................................................................................................................. 14
1.4.4 Mechanical.............................................................................................................................. 15
Section 2: Protection Functions ............................................................................................................................. 16
2.1 27/59 Under/Over Voltage .................................................................................................................... 16
2.1.2 Reference ............................................................................................................................... 16
2.1.3 Operate and Reset Level ........................................................................................................ 16
2.1.4 Operate and Reset Time......................................................................................................... 16
2.2 37 Undercurrent .................................................................................................................................... 17
2.2.2 Reference ............................................................................................................................... 17
2.2.3 Operate and Reset Level ........................................................................................................ 17
2.2.4 Operate and Reset Time......................................................................................................... 17
2.3 46NPS Negative Phase Sequence Overcurrent ................................................................................... 18
2.3.1 Reference (46DT) ................................................................................................................... 18
2.3.2 Operate and Reset Level (46DT) ............................................................................................ 18
2.3.3 Operate and Reset Time (46DT)............................................................................................. 18
2.3.4 Reference (46IT)..................................................................................................................... 19
2.3.5 Operate and Reset Level (46IT).............................................................................................. 19
2.3.6 Operate and Reset Time (46IT) .............................................................................................. 19
2.4 47 Negative Phase Sequence Voltage.................................................................................................. 20
2.4.1 Reference (47) ........................................................................................................................ 20
2.4.2 Operate and Reset Level (47)................................................................................................. 20
2.4.3 Operate and Reset Time (47) ................................................................................................. 20
2.5 49 Thermal Overload ............................................................................................................................ 21
2.5.1 Reference ............................................................................................................................... 21
2.5.2 Operate and Reset Level ........................................................................................................ 21
2.5.3 Operate and Reset Time......................................................................................................... 21
2.6 50 Instantaneous Overcurrent............................................................................................................... 23
2.6.1 Reference ............................................................................................................................... 23
2.6.2 Operate and Reset Level ........................................................................................................ 23
2.6.3 Operate and Reset Time......................................................................................................... 23
2.7 50G Instantaneous Measured Earth Fault ............................................................................................ 24
2.7.1 Reference ............................................................................................................................... 24
2.7.2 Operate and Reset Level ........................................................................................................ 24
2.7.3 Operate and Reset Time......................................................................................................... 24
2.8 50SEF Instantaneous Sensitive Earth Fault.......................................................................................... 25
2.8.1 Reference ............................................................................................................................... 25
2.8.2 Operate and Reset Level ........................................................................................................ 25
©2010 Siemens Protection Devices Limited
7SR224 Argus Performance Specification
Chapter 3 Page 2 of 49