15
Switchgroups
SGR1…11
The start and operate signals of the protection
stages are combined with the outputs SS1…
SS4 and TS1…TS4 with the switches of
switchgroups SGR1…11.
The matrix shown below can be used as an aid
for making the desired selections. The start and
operate signals of the different protection stages
can be combined with the output signals
SS1…SS4 and TS1…TS4 by encircling the
desired intersection points. Each intersection
point is marked with a switch number and the
corresponding weight factor of the switch is
shown at the bottom row of the matrix. By
horizontally adding the weight factors of all the
selected switches of a switchgroup the switch-
group checksums is obtained.
Note!
Check if all the start and operate signals of the
relay module SPCJ 4D28/E351 are available in
the protection relay in question.
Fig. 6. Output signal matrix of the combined overcurrent and earth-fault relay module
SPCJ 4D28/E351.
I>
t>
I>>
t>>
I>>>
t>>>
I >
t >
I >>
t >>
t
∆
>
SGR1
SGR2
SGR3
SGR4
SGR5
SGR6
SGR7
SGR8
SGR9
SGR10
SGR11
SS1
TS1
SS2
TS2
SS3
TS3
SS4
TS4
1
2
4
8
16
32
64
128
Switch-
group
Operation stage
∑
SGR1 =
∑
SGR2 =
∑
SGR3 =
∑
SGR4 =
∑
SGR5 =
∑
SGR6 =
∑
SGR7 =
∑
SGR8 =
∑
SGR9 =
∑
SGR10 =
∑
SGR11 =
Weighting factor
Output signal
0
0
0
0
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Checksum
(factory setting)
(
∑
= 0)
(
∑
= 42)
(
∑
= 0)
(
∑
= 42)
(
∑
= 0)
(
∑
= 42)
(
∑
= 0)
(
∑
= 42)
(
∑
= 0)
(
∑
= 42)
(
∑
= 42)
I>
∆
Содержание SPAA 341 C /E351
Страница 130: ......
