Functions
This chapter describes the numerous functions available on the SIPROTEC 4 device 7SJ62/64. It shows the
setting possibilities for each function in maximum configuration. Information with regard to the determina-
tion 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 32
2.2 Overcurrent Protection 50, 51, 50N, 51N 57
2.3 Directional Overcurrent Protection 67, 67N 85
2.4 Dynamic Cold Load Pickup 111
2.5 Single-Phase Overcurrent Protection 117
2.6 Voltage Protection 27, 59 127
2.7 Negative Sequence Protection 46 137
2.8 Motor Protection 144
2.9 Frequency Protection 81 O/U 163
2.10 27/Q 167
2.11 Thermal Overload Protection 49 172
2.12 Monitoring Functions 180
2.13 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) 200
2.14 Intermittent Ground Fault Protection 225
2.15 Dir. Intermittent earth fault protection 231
2.16 Automatic Reclosing System 79 236
2.17 Fault Locator 260
2.18 Breaker Failure Protection 50BF 263
2.19 Flexible Protection Functions 270
2.20 Reverse-Power Protection Application with Flexible Protection Function 281
2.21 Synchronization Function 289
2.22 Temperature Detection via RTD Boxes 306
2.23 Phase Rotation 314
2.24 Function Logic 315
2.25 Auxiliary Functions 317
2.26 Protection for Single-phase Voltage Transformer Connection 349
2.27 Breaker Control 353
2
SIPROTEC 4, 7SJ62/64, Manual 31
C53000-G1140-C207-8, Edition 08.2016
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