917SS52 V4 Manual
C53000-G1176-C182-3
Functions 5
This chapter explains the various functions of the SIPROTEC 7SS52 V4 distributed
busbar and breaker failure protection. It shows the setting possibilities for each func-
tion in maximum configuration. It also gives information and - where required - formu-
lae for determination of the setting values.
Unless otherwise specified, all settings are made on the central unit by means of the
DIGSI communication software.
Contents
5.1 Busbar Protection 92
5.2 Check Zone 112
5.3 Circuit Breaker Failure Protection 114
5.4 End Fault Protection 135
5.5 Supervisory Functions 140
5.6 Oscillographic Fault Recording 160
5.7 Device 163
5.8 Power System Data 166
5.9 Protection General 167
5.10 Bay Unit 177
5.11 Integrated Operation of the Bay Unit 178
5.12 PC Port of the Bay Unit 180
5.13 Fault Recording in the Bay Unit (”Local Fault Recording”) 182
5.14 Scope of Protective Functions in the Bay Unit 184
5.15 Power System Data of the Bay Unit 186
5.16 Overcurrent Protection in the Bay Unit 188
5.17 User-Defined Annunciations 197
5.18 Backup Breaker Failure Protection in the Bay Unit 202
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