Siemens SIPROTEC 7SD610 User Manual

Functions
2.13 Circuit Breaker Failure Protection
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
193
The delay time T-PoleDiscrep. (address 3932) indicates how long a circuit breaker pole discrepancy con-
dition of the feeder circuit breaker, i.e. only one or two poles open, may be present before the pole discrepancy
supervision issues a 3-pole trip command. This time must be clearly longer than the duration of a 1-pole auto-
matic reclose cycle. The time should be less than the permissible duration of an unbalanced load condition
which is caused by the unsymmetrical position of the circuit breaker poles. Conventional values are 2 s to 5 s.
2.13.3 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 7SD610 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SD610
Category	Relays
Language	English