Siemens SIPROTEC User Manual

Functions
2.22 Circuit Breaker Failure Protection
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
412
2.22.3 Settings
The table indicates region-specific presettings. Column C (configuration) indicates the corresponding second-
ary nominal current of the current transformer.
Addr. Parameter C Setting Options Default Setting Comments
3901 FCT BreakerFail ON
OFF
ON Breaker Failure Protection
3902 I> BF 1A 0.05 .. 20.00 A 0.10 A Pick-up threshold I>
5A 0.25 .. 100.00 A 0.50 A
3903 1p-RETRIP (T1) NO
YES
YES 1pole retrip with stage T1
(local trip)
3904 T1-1pole 0.00 .. 30.00 sec; ∞ 0.00 sec T1, Delay after 1pole start
(local trip)
3905 T1-3pole 0.00 .. 30.00 sec; ∞ 0.00 sec T1, Delay after 3pole start
(local trip)
3906 T2 0.00 .. 30.00 sec; ∞ 0.15 sec T2, Delay of 2nd stage
(busbar trip)
3907 T3-BkrDefective 0.00 .. 30.00 sec; ∞ 0.00 sec T3, Delay for start with de-
fective bkr.
3908 Trip BkrDefect. NO
with T1-trip
with T2-trip
w/ T1/T2-trip
NO Trip output selection with
defective bkr
3909 Chk BRK CONTACT NO
YES
YES Check Breaker contacts
3912 3I0> BF 1A 0.05 .. 20.00 A 0.10 A Pick-up threshold 3I0>
5A 0.25 .. 100.00 A 0.50 A
3913 T2StartCriteria With exp. of T1
Parallel withT1
Parallel withT1 T2 Start Criteria
3921 End Flt. stage ON
OFF
OFF End fault protection
3922 T-EndFault 0.00 .. 30.00 sec; ∞ 2.00 sec Trip delay of end fault pro-
tection
3931 PoleDiscrepancy ON
OFF
OFF Pole Discrepancy supervi-
sion
3932 T-PoleDiscrep. 0.00 .. 30.00 sec; ∞ 2.00 sec Trip delay with pole dis-
crepancy

Siemens SIPROTEC Specifications

General

Brand	Siemens
Model	SIPROTEC
Category	Protection Device
Language	English