Functions
6-214 7SA522 Manual
C53000-G1176-C119-2
The delay time 73ROH'LVFUHS (address ) determines how long a breaker
pole discrepancy condition of the feeder circuit breaker, i.e. only one or two poles
open, may be present before the pole discrepancy supervision issues a three-pole trip
command. This time must clearly be longer than the duration of a single-pole
automatic 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.
6.15.3 Settings
The indicated secondary current values for setting ranges and default settings refer to
I
N
= 1 A. For the nominal current 5 A these values are to be multiplied by 5.
6.15.4 Information Overview
Addr. Setting Title Setting Options Default Setting Comments
3901 FCT BreakerFail ON
OFF
ON Breaker Failure Protection is
3902 I> BF 0.05..20.00 A 0.10 A Pick-up threshold I>
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 defective
bkr.
3908 Trip BkrDefect. NO
trips with T1-trip-signal
trips with T2-trip-signal
trips with T1 and T2-trip-
signal
NO Trip output selection with defec-
tive bkr
3909 Chk BRK CON-
TACT
NO
YES
YES Check Breaker contacts
3921 End Flt. stage ON
OFF
OFF End fault stage is
3922 T-EndFault 0.00..30.00 sec 2.00 sec Trip delay of end fault stage
3931 PoleDiscrepancy ON
OFF
OFF Pole Discrepancy supervision
3932 T-PoleDiscrep. 0.00..30.00 sec 2.00 sec Trip delay with pole discrepancy
F.No. Alarm Comments
1401 >BF on >BF: Switch on breaker fail protection
1402 >BF off >BF: Switch off breaker fail protection
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