Technical Data
4.2 Protection Interfaces and Connections
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
293
4.2 Protection Interfaces and Connections
Differential Protection
Protection Interfaces
1)
When using multimode fiber, a monomode patch cable is used on the sending side; a multimode patch cable
is used on the receiving side (mode conditioning patch cable).
Number of devices for one protected object
(=number of ends delimited by the current transformer)
2
Connection optical fiber Port „A“
Connection electrical Voltage terminal „D1“ and "D2"
Connection modules for protection data interface, depending on the order variant:
Optical protection data interface:
Maximum distance monomode fiber 14.91 miles
Maximum distance multimode fiber
1)
2.49 miles
Protocol Full duplex
Connector type Duplex LC connector, SFF (IEC 61754-20 standard)
Maximum baudrate 512 kbit/s
Transmission rate min. -15 dBm
avg
max. -8 dBm
avg
Receiver sensitivity (maximum) -31 dBm
avg
Optical wavelength 1310 nm
Optical budget 16.0 dB
Laser Class 1 according to EN 60825-1/-2 Using monomode fiber 9 µm/125 µm
Range You should assume a path attenuation of 0.5 dB/km (0.8 dB/miles)
for monomode and multimode fiber. For multimode fiber you must
additionally take the product of the bandwidth lengths into consider-
ation.
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