Technical Data
4.2 Protection Data Interfaces and differential protection topology
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
584
4.2 Protection Data Interfaces and differential protection topology
Differential Protection Topology
1)
7SD5*2 as device with one protection data interface for true two-end operation or for chain operation at the ends of a
multi-end configuration
2)
7SD5*2 as device with two data protection interfaces for redundant two-end operation
3)
7SD5*3 as device with two data protection interfaces for chain and ring operation of a multi-end configuration
Protection Data Interfaces
1)
Numeric opening (NA = sin φ (coupling angle)
Number of devices for one protected object
(=number of ends delimited by the current transformer)
2 to 6 for 7SD5*2/7SD5*3
1)
2)
3)
Number 1 or 2
Connection optical fibre Mounting location „D“ for one connection or „D“ and „E“
for two connections
For flush-mounting housing On the rear side
For panel surface-mounting housing In console housing at device bottom
Connection modules for protection data interface, depending on the ordering version:
FO5
FO30 (IEEE C37.94)
Distance, maximum 1.5 km or 0.9 miles
Connector Type ST connector
Optical wavelength λ = 820 nm
Fibre Type Multimode 62.5 μm/125 μm
Transmit output (peak) Min. Type max.
50 μm /125 μm, NA = 0.2
1)
62.5 μm /125 μm, NA = 0.275
1)
-19.8 dBm
-16.0 dBm
-15.8 dBm
-12.0 dBm
-12.8 dBm
-9.0 dBm
Receiver sensitivity (peak)
– Optical power for high level
– Optical power for low level
Max. -40 dBm
Min. -24 dBm
Optical budget min. 4.2 dB for 50 μm /125 μm, NA = 0.2
1)
min. 8 dB for 62.5 μm /125 μm, NA = 0.275
1)
Laser class 1 according to EN 60825-1/-2 Using glass fibre 62.5 μm /125 μm and 50 μm /125 μm
Reach for multimode optical fibre, an optical signal attenuation of 3
dB/km is used for calculating light with a wavelength of λ = 820
nm
Attenuators required no
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