Functions
This chapter describes the numerous functions available on the SIPROTEC 4 device 7SC80. 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 34
2.2 Overcurrent Protection 50, 51, 50N, 51N 71
2.3 Directional Overcurrent Protection 67, 67N 111
2.4 Dynamic Cold Load Pickup 151
2.5 Single-Phase Overcurrent Protection 166
2.6 Voltage Protection 27, 59 187
2.7 47 Negative Phase Sequence Overvoltage 202
2.8 27/59 Under/Over Voltage for Vx 204
2.9 Negative Sequence Protection 46 208
2.10 Frequency Protection 81 O/U 215
2.11 Thermal Overload Protection 49 219
2.12 Monitoring Functions 225
2.13 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) 248
2.14 Automatic Reclosing System 79 269
2.15 Sectionalizer Function 304
2.16 Triple Single Mode 309
2.17 Fault Locator 314
2.18 Breaker Failure Protection 50BF 317
2.19 Flexible Protection Functions 323
2.20 Synchrocheck 337
2.21 Capacitor Control 348
2.22 Tap Changer 351
2.23 Recloser Capacitor Test 355
2.24 Phase Rotation 358
2.25 Function Logic 359
2.26 Auxiliary Functions 361
2.27 Breaker Control 383
2.28 Notes on Device Operation 395
2.29 Recloser Setting Summary 403
2.30 Additional Applications with 6 Voltage Inputs 425
2
SIPROTEC Compact, 7SC80, Manual 33
E50417-G1140-C486-A8, Edition 07.2017
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