Protection Interfaces and Connections
Differential Protection
Number of devices for one protected object (=number of ends delimited by the current trans-
former)
2
Protection Interfaces
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 24 km (14.91 miles)
Maximum distance multimode fiber
1)
4 km (2.49 miles)
Protocol Full duplex
Connector type Duplex-LC-Stecker, 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 consideration.
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).
Electrical protection data interface:
Maximum distance
16 km (9.94 miles) (for AWG 19 / 0.65 mm
2
)
Maximum transmission rate 128 kBit/s
Telecommunication cable or communication cable twin-wire, e.g. A-2Y(L)2Y-Kabel
Cable attenuation < 40 dB (for 80 kHz)
Ranges determined during tests
1)
Mode Transmission rate
[kbit/s]
maximum range [km] Attenuation [db] Signal noise ratio
(SNR) [db]
Telephone wire A-2Y(L)2Y 20x2x0.8 twisted, fully screened
01 64 20 42 12
02 128 18 42 11
03 64 20 39 7
04 128 20 42 6
05 128 16 33 9
06 128 14 28 6
Signal line A-2Y2YB2Y 20x1x1.4 PE insulation material, single wires not twisted, fully screened
01 64 6 10 36
02 128 6 13 21
4.2
Technical Data
4.2 Protection Interfaces and Connections
SIPROTEC 4, 7SD80, Manual 259
E50417-G1100-C474-A2, Edition 02.2018
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