Siemens siprotec 7SA6 User Manual

Functions
6-2637SA6 Manual
C53000-G1176-C156-2
The delay time T-PoleDiscrep. (address 3932) 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.
6.18.3 Settings
Note: The indicated secondary current values for setting ranges and default settings
refer to I
N
= 1 A. For the nominal current 5 A the current values are to be multiplied
by 5.
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
tripswithT1andT2-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

Siemens siprotec 7SA6 Specifications

General

Brand	Siemens
Model	siprotec 7SA6
Category	Relays
Language	English