Functions
6-797SA6 Manual
C53000-G1176-C156-2
Figure 6-45 Distance Protection for three ends with three 7SA6, chain topology
Communication
Media
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.
3
Index 2
Index 3
2
7SA522
7SA6
PI2
PI1
PI1
1
Index 1
7SA6
PI1
Table 6-10 Communication via direct connection
Type of
module
Type of
connector
Fibre type Optical
wavelength
Permissible
path attanua-
tion
Distance,
typical
FO5 ST Multimode
62,5/125 µm
820 nm 8 dB 1,5 km
FO6 ST Multimode
62,5/125 µm
820nm 16dB 3,5km
FO7 ST Monomode
9/125 µm
1300 nm 7dB 10km
FO8 FC Monomode
9/125 µm
1300 nm 18 dB 35 km
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