Siemens 7SR12 Argus - Page 116

7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 4 of 56
2.8.1 Reference ................................................................................................................................ 27
2.8.2 Operate and Reset Level ......................................................................................................... 27
2.8.3 Operate and Reset Time ......................................................................................................... 27
2.9 50G Instantaneous Measured Earth Fault ............................................................................................. 28
2.9.1 Reference ................................................................................................................................ 28
2.9.2 Operate and Reset Level ......................................................................................................... 28
2.9.3 Operate and Reset Time ......................................................................................................... 28
2.10 50N Instantaneous Derived Earth Fault ................................................................................................. 29
2.10.1 Reference ................................................................................................................................ 29
2.10.2 Operate and Reset Level ......................................................................................................... 29
2.10.3 Operate and Reset Time ......................................................................................................... 29
2.11 50SEF Instantaneous Sensitive Earth Fault .......................................................................................... 30
2.11.1 Reference ................................................................................................................................ 30
2.11.2 Operate and Reset Level ......................................................................................................... 30
2.11.3 Operate and Reset Time ......................................................................................................... 30
2.12 51 Time Delayed Overcurrent ................................................................................................................ 31
2.12.1 Reference ................................................................................................................................ 31
2.12.2 Operate and Reset Level ......................................................................................................... 31
2.12.3 Operate and Reset Time ......................................................................................................... 31
2.13 51G Time Delayed Measured Earth Fault ............................................................................................. 37
2.13.1 Reference ................................................................................................................................ 37
2.13.2 Operate and Reset Level ......................................................................................................... 37
2.13.3 Operate and Reset Time ......................................................................................................... 37
2.14 51N Time Delayed Derived Earth Fault ................................................................................................. 39
2.14.1 Reference ................................................................................................................................ 39
2.14.2 Operate and Reset Level ......................................................................................................... 39
2.14.3 Operate and Reset Time ......................................................................................................... 39
2.15 51SEF Time Delayed Sensitive Earth Fault ........................................................................................... 41
2.15.1 Reference ................................................................................................................................ 41
2.15.2 Operate and Reset Level ......................................................................................................... 41
2.15.3 Operate and Reset Time ......................................................................................................... 41
2.16 51V Voltage Controlled Overcurrent ...................................................................................................... 43
2.16.1 Reference ................................................................................................................................ 43
2.16.2 Operate and Reset Level ......................................................................................................... 43
2.17 50AFD ARC Flash Detector ................................................................................................................... 44
2.17.1 Reference ................................................................................................................................ 44
2.17.2 Operate and Reset Level ......................................................................................................... 44
2.17.3 Operate and Reset Time ......................................................................................................... 44
2.18 55 Power Factor .................................................................................................................................... 45
2.18.1 Reference ................................................................................................................................ 45
2.18.2 Operate and Reset Level ......................................................................................................... 45
2.18.3 Operate and Reset Time ......................................................................................................... 45
2.18.4 Operate Threshold ................................................................................................................... 45
2.19 59N Neutral Voltage Displacement ........................................................................................................ 46
2.19.1 Reference (59NDT) ................................................................................................................. 46
2.19.2 Operate and Reset Level (59NDT) .......................................................................................... 46
2.19.3 Operate and Reset Time (59NDT) ........................................................................................... 46
2.19.4 Reference (59NIT) ................................................................................................................... 46
2.19.5 Operate and Reset Level (59NIT) ............................................................................................ 46
2.20 64H Restricted Earth Fault Protection ................................................................................................... 48
2.20.1 Reference ................................................................................................................................ 48
2.20.2 Operate and Reset Level ......................................................................................................... 48
2.20.3 Operate and Reset Time ......................................................................................................... 48
2.21 67/67N Directional Overcurrent & Earth Fault ....................................................................................... 49
2.21.1 Reference ................................................................................................................................ 49
2.21.2 Operate Angle ......................................................................................................................... 49
2.21.3 Operate Threshold ................................................................................................................... 49
2.21.4 Operate and Reset Time ......................................................................................................... 49
2.22 Directional SEF - Wattmetric ................................................................................................................. 50
2.22.1 Reference ................................................................................................................................ 50
2.22.2 Operate and Reset Level ......................................................................................................... 50
2.22.3 Operate and Reset Time ......................................................................................................... 50
2.23 81 Under/over frequency ....................................................................................................................... 51