Private sector
Wind farm
Long loops and lightning exposure, with maintenance access measured in hours of travel.
- Area
- Fiber & OT
- Architecture patterns
- 1
- Products used
- 5
The problem
What makes it hard
Each turbine is a 100-metre lightning conductor with a 33 kV switchgear at its foot. The park’s internal network gathers 20–80 turbines to a collection substation, and an export line runs from there to the connection point. Both the overvoltage protection and the selective line differential protection on the export line need communication that does not conduct.
The fiber lies in the same trench as the medium-voltage cable, and in wind power it often lies inside it. There is then no physical route separation to build redundancy on: the same excavator takes both.
How it is built
Teleprotection between two substations
The optical budget and the delay budget are calculated together, because the link is part of the protection.
See the full pattern- Data path
- Path that does not exist
In the catalogue
Equipment from the catalogue
Built from: Fiber Optical Converter G.703 Codir – IEEE C37.94 MM 60-00-7164 (21-216), Fiber Optical Converter IEEE C37.94 MM/SM 60-00-5593 (21-203), Fiber Optical Extender 80-120km 60-00-7251 (21-223) and 2 more below.
Standard
Fiber Optical Converter IEEE C37.94 MM/SM
- Typical distance
- 2 km
- Wavelength
- 1310/1550 nm
- Fiber optic connector
- LC
Product no 60-00-5593 (21-203)
Standard
Fiber Optical Extender 80-120km
- Wavelength
- 1310 nm
- Fiber optic connector
- LC
Product no 60-00-7251 (21-223)
Standard
Fiber Optical Trip Link 110 V 39 dB (120 km)
- Optical system budget
- 39 dB
- Typical distance
- 120 km
Product no 60-00-5740 (23-453)
Standard
Fiber Optical Trip Link 220 V 39 dB (120 km)
- Optical system budget
- 39 dB
- Typical distance
- 120 km
Product no 60-00-5556 (23-452)
Reading and references
Explained in
Named customer references are not published. What we can show is the solution area this environment belongs to, and the reasoning behind the design.
Environments
Environments with the same problem
The technology is the same; the buying process usually is not.
- Substation with teleprotectionDelay and channel asymmetry decide whether the protection trips correctly — the link is part of the protection scheme, not a service to it.
- Link between buildings over public landThe operator’s later cross-connects eat your budget after handover, which is why the acceptance measurement matters.
- Railway signalling installationVibration and a 40-year installation lifetime set the requirements, not the data rate.
- Power plant with high electromagnetic interferenceImmunity is the requirement, and it is the one figure the datasheet is expected to answer without discussion.
Next step
Describe your environment
If yours is close to this one but not the same, that difference is usually where the design decisions are. Tell us what it looks like.
Verified credentials
All certifications- ISO 9001 14001ISO certifiedQuality & environmentDownload certificate (JPG)
- Made in SwedenDesigned & built in StockholmSecure supply chain
- NATOCertified TEMPEST supplierSDIP-27 · Level A & B
- Swedish Armed ForcesM-numbered equipmentMain supplier, Total Defence
- Government of SwedenSupplier to Swedish authoritiesPolice · FMV · FOI
- SOFFDefence industry memberExport control frameworks
