Circuit Breaker Failure Protection
115
7SS52 V4 Manual
C53000-G1176-C182-1
Is< BF - EF The parameter Is< BF - EF (6202A/CU) is used to set the stabilizing current thresh-
old I
s
/I
no
for the selective busbar protection and the check zone in the presence of a
1-pole earth fault.
The setting of the parameter depends on the maximum stabilizing current to be ex-
pected and on the behaviour of the CTs.
This parameter is only displayed if the parameter EF charact. (6320A/CU) is set
to released.
With setting 0.00 the characteristic will not be used.
5.3.3 Settings for the Central Unit
5.3.4 List of Information from the Central Unit
Addr. Setting Title Setting Options Default Setting Comments
118 I> BF 0.10 .. 2.00 I / In 0.50 I / In Current threshold for BF
119 I> BF-EF 0.05 .. 2.00 I / In 0.25 I / In Current threshold for BF - EF
6201 STAB FAC:BF 0.00 .. 0.80 0.50 Stabilizing factor BF protection
6308 Id> SUPERV BZ 0.05 .. 0.80 I/Ino 0.10 I/Ino Limit value diff-current supervi-
sion -BZ
6202A Is< BF - EF 0.00 .. 25.00 I/In 5.00 I/In Stabilizing current threshold - BF
- EF
6320A EF charact. released
blocked
blocked Earth fault characteristic switcho-
ver
FNo. Alarm Comments
10478 >EF charact. >Earth fault characteristic active
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