
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
Содержание SIPROTEC 4 7SD80
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