Protection Data Interfaces And Differential Protection Topology - Siemens SIPROTEC Manual

Technical Data

4.2 Protection Data Interfaces and differential protection topology

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