Protection Interfaces And Connections; Differential Protection; Protection Interfaces - Siemens 7SR18 Solkor Manual

1.5

Protection Interfaces and Connections

1.5.1

Differential Protection

Description / Attribute
Number of Devices for protected zone
1.5.2

Protection Interfaces

Type
Optical Fibre Data Interface
Maximum Distance Multi-Mode
Protocol
Connector Type
Transmission Level
Receiver Sensitivity
Optical Wavelength
Optical Budget
LED Class 1
Range
1)
Based on fibre attenuations: -
Assumes no joins in the fibre, but includes a 3 dB safety margin.
Actual losses for specific application should be calculated using cable manufacturers data or by direct measurement using
specialised equipment.
Unrestricted ©2018 Siemens Protection Devices Limited
Value
2
Value
1)
Up to 2 km
Full Duplex
TM
ST (BFOC/2.5)
max -10 dBm
ave
min -15 dBm
ave
Typical -12 dBm
ave
-24 dBm
ave
820 nm
12 dB
Using multi-mode fibre 62.5 µm / 125 µm
Assume a path attenuation of 3.5 dB/km (5.6 dB / mile) for multi-mode
fibre. For multi-mode fibre you must additionally take the product of the
bandwidth lengths into consideration.
Page 11 of 44
7SR18 Performance Specification