Public and private sector
Substation with teleprotection
Delay and channel asymmetry decide whether the protection trips correctly — the link is part of the protection scheme, not a service to it.
- Area
- Fiber & OT
- Architecture patterns
- 1
- Products used
- 7
The problem
What makes it hard
During an earth fault one substation’s earth potential rises relative to another by kilovolts for a few tens of milliseconds. A copper link between the substations then has that difference across it — precisely when the protection has to send its trip command. Fiber removes the galvanic path rather than attenuating the problem.
Three things at once: 200 mm cabinet depth, which the catalogue is built for and general 19-inch equipment is not; auxiliary power at 110 or 220 V DC from a battery bank rather than 230 V AC, which the catalogue’s 48–250 VDC range covers; and a documented EMC environment at IEC 60255 level rather than EN 61000-6-2 level. A converter built for an office does not meet this.
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 Converter IEEE C37.94 – G.703 E1 60-00-9166 (21-219v2) and 4 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 Converter IEEE C37.94 – G.703 E1
- Wavelength
- 820nm
- Fiber optic connector
- ST
- Connector
- Terminal Block, 3-pin
Product no 60-00-9166 (21-219v2)
Standard
Fiber Optical Extender 80-120km
- Wavelength
- 1310 nm
- Fiber optic connector
- LC
Product no 60-00-7251 (21-223)
Standard
Fiber Optical Extender 200 km
- Wavelength
- 1310 nm
- Fiber optic connector
- LC
Product no 60-00-6682 (21-223)
Standard
Fiber Optical Extender 250 km
- Wavelength
- 1310 nm
- Fiber optic connector
- LC
Product no 60-00-7252 (21-223)
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.
- Wind farmLong loops and lightning exposure, with maintenance access measured in hours of travel.
- 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.
- Switching station with SCADA releaseMeasurements must leave the station without opening a way back in.
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
