Switchgroups and parameter masks
The settings can be altered and the functions of the relay selected in the SG_ selector
switchgroups. The switchgroups are software based and thus not physical switches
to be found in the hardware of the relay.
A checksum is used for verifying that the switches have been properly set. The
Fig. 5.1.4.10.-1 shows an example of manual checksum calculation.
5505024
SG_
S
=
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768
65536
131072
262144
524288
1048576
2097152
4194304
1
0
4
0
16
0
64
0
256
0
1024
0
4096
0
4096
0
16384
0
65536
0
262144
0
1048576
0
4194304
Switch
number
Position
Weighting
factor
Value
checksum
A051892
Fig. 5.1.4.10.-1 Example of calculating the checksum of a SG_ selector switchgroup
When the checksum, calculated according to the example above, equals the
checksum of the switchgroup, the switches in the switchgroup are properly set.
The factory default settings of the switches and the corresponding checksums are
presented in the following tables.
SGF1...SGF5
Switchgroups SGF1...SGF5 are used for configuring the wanted function as
follows:
60
REF610REF610
Feeder Protection Relay
Technical Reference Manual - ANSI Version
1MRS755535
To Next Page
Loading...
