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1
7SA6
Index 1
PI1
Figure 6-45
Distance Protection for three ends with three 7SA6, chain topology
Communication
Media
7SA6 Manual
C53000-G1176-C156-2
The communication is enabled via direct optical fibre connections or communication
networks. Which kind of media is used, depends on the distance and on the
communication media available. For shorter distances a direct connection via optical
fibres having a transmission ratio of 512 kBit/s is possible. Otherwise we recommend
communication converters. A transmission via modem and communication networks
can also be realized. Please take into consideration that the tripping times of Distance
Protection devices depend on the quality of transmission and that they are prolonged
in case of a reduced transmission quality and /or an increased operating time.
Figure 6-46 shows some examples for communication connections. In case of a direct
connection the distance depends on the type of the optical fibre. Table 6-10 lists the
options available. Different types of modules can be installed in the device. For
ordering information see Appendix A, Subsection A.1.1, Accessories.
Table 6-10
Communication via direct connection
Type of
Type of
module
connector
FO5
ST
FO6
ST
FO7
ST
FO8
FC
PI1
7SA522
2
Index 2
PI2
Fibre type
Optical
wavelength
Multimode
820 nm
62,5/125 µm
Multimode
820 nm
62,5/125 µm
1300
Monomode
nm
9/125 µm
1300
Monomode
nm
9/125 µm
Functions
3
7SA6
Index 3
PI1
Permissible
Distance,
path attanua-
typical
tion
8 dB
1,5 km
16 dB
3,5 km
7 dB
10 km
18 dB
35 km
6-79
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