Siemens 7SR18 Solkor - Page 121

7SR18 Performance Specification
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2.7.1 Reference ......................................................................................................................... 26
2.7.2 Operate and Reset Level ................................................................................................... 26
2.7.3 Operate and Reset Time .................................................................................................... 27
2.8 51G Time Delayed Measured Earth Fault ........................................................................................ 32
2.8.1 Reference ......................................................................................................................... 32
2.8.2 Operate and Reset Level ................................................................................................... 32
2.8.3 Operate and Reset Time .................................................................................................... 33
2.9 51N Time Delayed Derived Earth Fault ............................................................................................ 34
2.9.1 Reference ......................................................................................................................... 34
2.9.2 Operate and Reset Level ................................................................................................... 34
2.9.3 Operate and Reset Time .................................................................................................... 35
2.10 67/67N Directional Overcurrent & Earth Fault ................................................................................... 36
2.10.1 Reference ......................................................................................................................... 36
2.10.2 Operate Angle ................................................................................................................... 36
2.10.3 Operate Threshold ............................................................................................................. 36
2.10.4 Operate and Reset Time .................................................................................................... 36
2.11 87L Differential ................................................................................................................................ 37
2.11.1 Reference ......................................................................................................................... 37
2.11.2 Operate and Reset Level ................................................................................................... 37
2.11.1 Operate Time .................................................................................................................... 37
2.12 87HS High-Set Differential ............................................................................................................... 38
2.12.1 Reference ......................................................................................................................... 38
2.12.2 Operate and Reset Level ................................................................................................... 38
2.12.3 Operate and Reset Time .................................................................................................... 38
2.13 85 Inter-trip Element ........................................................................................................................ 38
2.13.1 Reference ......................................................................................................................... 38
2.13.2 Operate Time .................................................................................................................... 38
Section 3: Supervision Functions ..................................................................................................................... 39
3.1 46BC Broken Conductor .................................................................................................................. 39
3.1.1 Reference ......................................................................................................................... 39
3.1.2 Operate and Reset Level ................................................................................................... 39
3.1.3 Operate and Reset Time .................................................................................................... 39
3.2 50BF Circuit Breaker Fail................................................................................................................. 40
3.2.1 Reference ......................................................................................................................... 40
3.2.2 Operate and Reset Level ................................................................................................... 40
3.2.3 Operate and Reset Time .................................................................................................... 40
3.3 60CTS & 60CTS-I Current Transformer Supervision ......................................................................... 41
3.3.1 Reference ......................................................................................................................... 41
3.3.2 Current & Voltage Threshold .............................................................................................. 41
3.3.3 Operate and Reset Time .................................................................................................... 41
3.4 60VTS Voltage Transformer Supervision ......................................................................................... 42
3.4.1 Reference ......................................................................................................................... 42
3.4.2 Operate and Reset Level ................................................................................................... 42
3.4.3 Operate and Reset Time .................................................................................................... 42
3.5 74TCS & 74CCS Trip & Close Circuit Supervision ............................................................................ 43
3.5.1 Reference ......................................................................................................................... 43
3.5.2 Operate and Reset Time .................................................................................................... 43
3.6 81HBL2 Inrush Detector .................................................................................................................. 43
3.6.1 Reference ......................................................................................................................... 43
3.6.2 Operate and Reset Time .................................................................................................... 43
List of Figures
Figure 2.3.3-1 Thermal Overload Protection Curves...................................................................... 22
Figure 2.7.3-1 IEC IDMTL Curves (Time Multiplier = 1) ................................................................. 28
Figure 2.7.3-2 ANSI IDMTL Operate Curves (Time Multiplier = 1) ................................................. 29
Figure 2.7.3-3 ANSI Reset Curves (Time Multiplier = 1) ................................................................ 30
Figure 2.7.3-4 IEC Reset Curves (Time Multiplier = 1) .................................................................. 31