Functions - Siemens SIPROTEC 4 Manual

2

Functions

This chapter describes the numerous functions available on the SIPROTEC 4 device 7SJ80. 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
2.2 Overcurrent Protection 50, 51, 50N, 51N
2.3 Directional Overcurrent Protection 67, 67N
2.4 Dynamic Cold Load Pickup
2.5 Single-Phase Overcurrent Protection
2.6 Voltage Protection 27, 59
2.7 Negative Sequence Protection 46
2.8 Frequency Protection 81 O/U
2.9 Undervoltage-controlled reactive power protection (27/Q)
2.10 Thermal Overload Protection 49
2.11 Monitoring Functions
2.12 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s)
2.13 Intermittent Ground Fault Protection
2.14 Dir. Intermittent earth fault protection
2.15 Automatic Reclosing System 79
2.16 Fault Locator
2.17 Breaker Failure Protection 50BF
2.18 Flexible Protection Functions
2.19 Reverse-Power Protection Application with Flexible Protection Function
2.20 Synchrocheck
2.21 Phase Rotation
2.22 Function Logic
2.23 Auxiliary Functions
2.24 Breaker Control
2.25 Notes on Device Operation
SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017
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