917SS52 V4 Manual
C53000-G1176-C182-1
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 111
5.3 Circuit Breaker Failure Protection 113
5.4 End Fault Protection 132
5.5 Supervisory Functions 139
5.6 Oscillographic Fault Recording 158
5.7 Device 161
5.8 Power System Data 164
5.9 Protection General 165
5.10 Bay Unit 174
5.11 Integrated Operation of the Bay Unit 175
5.12 PC Port of the Bay Unit 177
5.13 Fault Recording in the Bay Unit (”Local Fault Recording”) 179
5.14 Scope of Protective Functions in the Bay Unit 181
5.15 Power System Data of the Bay Unit 183
5.16 Overcurrent Protection in the Bay Unit 185
5.17 User-Defined Annunciations 194
5.18 Backup Breaker Failure Protection in the Bay Unit 197
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