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Switchgroup SG4
Exemple de
calcul de
checksum
The software switchgroup SG4 contains three
selector switches in the fourth submeny of reg-
ister A.
Switch Function
1
Switch SG4/1 is used, when the I
selected for start-up supervision. (SGF/7 = 1)
When SG4/1 = 0, the relay calculates the I
starting situation. A starting situation is defined as a situation,
where the phase currents increase from a value less than 0.12 I
to a value exceeding 1.5 x I
situation ceases when the phase currents fall below 1.25 x I
more than 100 ms.
When SG4/1 = 1, the relay starts calculating the I
when the start current I
2
When SG4/2 = 1, the restart enable message TS1 is disabled.
3
When SG4/3 = 1, the start signal of the I
routed to output SS1.
Factory set default checksum of switchgroup SG4
L'exemple ci-dessous illustre comment on peut
calculer manuellement le checksum du groupe-
commutateurs SGF.
Commutateur
SGF/1
SGF/2
SGF/3
SGF/4
SGF/5
SGF/6
SGF/7
SGF/8
Ckecksum du groupe-commutateurs SGF
Lorsque le checksum calculé selon l'exemple est
égal au checksum indiqué sur l'afficheur du
module de relais, les commutateurs sont réglés
correctement.
2
x t
principle has been
s
s
2
x t
s
within less than 60 ms. The starting
θ
is exceeded.
s
stage is directly
s
Facteur
Pos commutateur
1
x
1
2
x
0
4
x
1
8
x
0
16
x
0
32
x
0
64
x
1
128
x
0
La fonction des commutateurs de program-
mation de chaque élément de protection est
spécifiée dans la description du module con-
cerné.
Factory Check-
setting
0
value in a
s
θ
for
θ
2
x t
value
s
s
0
0
Valeur
=
1
=
0
=
4
=
0
=
0
=
0
=
64
=
+ 0
69
sum
value
1
2
4
0
19
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