6-17SJ62 Manual
C53000-G1140-C121-1
Functions 6
This chapter describes the numerous functions available on the SIPROTEC
®
7SJ62
relay. The setting options for each function are defined, including instructions for re-
porting setting values and formulas where required.
6.1 General 6-3
6.2 Overcurrent Protection (50, 50N, 51, 51N) 6-18
6.3 Directional Overcurrent Protection (67, 67N) 6-40
6.4 Dynamic Cold Load Pick-Up Function (50c, 50Nc, 51Nc, 67c, 67Nc) 6-62
6.5 Inrush Restraint 6-69
6.6 Sensitive Ground Fault Detection (64, 50Ns, 67Ns) 6-73
6.7 Negative Sequence Protection (46) 6-86
6.8 Motor Starting Protection (48) 6-94
6.9 Thermal Overload Protection (49) 6-99
6.10 Start Inhibit for Motors (66/68) 6-106
6.11 Voltage Protection (27, 59) 6-111
6.12 Frequency Protection (81 O/U) 6-120
6.13 Breaker Failure Protection (50BF) 6-124
6.14 Automatic Reclosing System (79M) 6-129
6.15 Fault Location 6-143
6.16 Phase Rotation 6-147
6.17 Monitoring Functions 6-148
6.18 Protection Function Logic 6-162
6.19 Auxiliary Functions 6-167
6.20 Breaker Control 6-175
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