Functions
This chapter describes the numerous functions available on the SIPROTEC 4 device 7SJ61. 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 28
2.2 Overcurrent Protection 50, 51, 50N, 51N 46
2.3 Dynamic Cold Load Pickup 72
2.4 Single-Phase Overcurrent Protection 77
2.5 Negative Sequence Protection 46 87
2.6 Motor Protection 94
2.7 Thermal Overload Protection 49 113
2.8 Monitoring Functions 121
2.9 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) 132
2.10 Intermittent Ground Fault Protection 141
2.11 Automatic Reclosing System 79 147
2.12 Breaker Failure Protection 50BF 167
2.13 Flexible Protection Functions 174
2.14 Temperature Detection via RTD Boxes 182
2.15 Phase Rotation 190
2.16 Function Logic 191
2.17 Auxiliary Functions 193
2.18 Breaker Control 219
2
SIPROTEC 4, 7SJ61, Manual 27
C53000-G1140-C210-6, Edition 05.2016
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