Functions
This chapter describes the numerous functions available on the SIPROTEC 4 device 7SD80. It shows the setting
possibilities for each function in maximum configuration. Information with regard to the determination of
setting values as well as formulas, if required, are also provided.
Based on the following information, it can also be determined which of the provided functions should be
used.
2.1 General 30
2.2 Phase Comparison Protection and Ground Differential Protection 48
2.3 Breaker Intertrip and Remote Tripping 69
2.4 Backup overcurrent 72
2.5 InRush Restraint 91
2.6 Circuit Breaker Failure Protection 50BF 94
2.7 Thermal Overload Protection 49 104
2.8 Undervoltage and Overvoltage Protection (optional) 27/59 108
2.9 Frequency Protection (optional) 81 123
2.10 Direct Local Trip 129
2.11 Automatic Reclosure Function (optional) 79 131
2.12 Circuit Breaker Test 142
2.13 Direct Remote Trip and Transmission of Binary Information 147
2.14 Monitoring Functions 149
2.15 Flexible Protection Functions 167
2.16 Function Logic 177
2.17 Auxiliary Functions 181
2.18 Breaker Control 193
2.19 Notes on Device Operation 203
2
SIPROTEC 4, 7SD80, Manual 29
E50417-G1100-C474-A2, Edition 02.2018
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General
