Power cables · DTS · RTTR · DSS
A cable temperature profile is only the start — RTTR puts it into operational context
DTS locates hotspots along a cable route. RTTR combines the measurement with a thermal model and load data. INTERLAB supplies the equipment used in these measurement layers.
hotspots and jointsDTS along the cable routeRTTR and current ratingtemperature and strain
Heat dissipation conditions vary along a cable: soil, ducts, crossings, adjacent circuits and joints create different thermal environments. DTS shows where temperature is actually increasing instead of limiting the measurement to a few points.
RTTR is a model layer. It uses temperature, electrical data and a cable model to support assessment of the cable’s current thermal state. It is not an automatic permission to overload the cable.
What do we need to know about the cable?
Each question requires the appropriate data source and model.
Hotspot
A local temperature rise can occur at a joint, in a duct or in a section with poorer heat dissipation.
Current rating
RTTR combines DTS measurements with a thermal model and load data; the operator remains responsible for the decision.
Mechanical strain
DSS/DTSS can complement DTS where cables are exposed to ground movement, anchoring forces or other mechanical loads.
Interference with the route
DAS can record excavation and dynamic events near the cable once the installation has been validated.
Measurement, model and operational function
Fibre temperature must not be equated with conductor temperature without an appropriate model.
| Phenomenon / objective | Technology | What it provides | INTERLAB portfolio |
|---|
| hotspot location | DTS | temperature profile along the route | LIOS EN.SURE, Silixa ULTIMA, XT-DTS |
| current thermal state | DTS + RTTR | measurement combined with the cable model and load | LIOS EN.SURE and the RTTR layer |
| cable or ground strain | DSS / DTSS | static-strain profile and trend | Silixa iDSS, fibrisTerre |
| excavation and dynamic events | DAS | location and vibration signature | OptaSense ATLAS, QuantX |
Important: We do not claim a fixed percentage increase in transmission capacity. RTTR results depend on the cable, model, environmental data, operator procedures and safety criteria.
Equipment for power cable monitoring
The configuration depends on route length, available fibres, environmental conditions and required integration.
DTS / RTTRLIOS EN.SURE
Equipment for continuous power-cable temperature monitoring and use with RTTR analysis.
View equipment →
DTSSilixa ULTIMA
Distributed temperature profiling for demanding measurements and field configurations.
View equipment →
DTSSilixa XT-DTS
A DTS platform for applications with demanding environmental requirements.
View equipment →
DSSSilixa iDSS
A complementary static-strain profile where cable and ground mechanics are important.
View equipment →
BrillouinfibrisTerre
Long-range strain and temperature measurement for linear infrastructure.
View equipment →
CategoryDTS temperature-monitoring systems
Current distributed temperature-sensing equipment in the INTERLAB portfolio.
Explore the category →
From sensing fibre to RTTR
A defensible result is built from four connected layers.
Sensing fibre
Its position relative to the cable affects the relationship between fibre and conductor temperature.
DTS measurement
Calibration, reference sections and topology provide a reliable temperature profile.
Thermal model
Cable, soil, route and load parameters translate the measurement into a thermal-state estimate.
Operator procedure
Alarms and operational decisions follow the asset design and the network owner’s rules.
Frequently asked questions
What is the difference between DTS and RTTR?
DTS measures a temperature profile. RTTR uses this measurement together with a thermal model and load data to support assessment of the cable state.
Is fibre temperature the same as conductor temperature?
Not always. The relationship depends on cable construction, fibre location, heat-dissipation conditions and the model.
Where do hotspots most often occur?
They may occur at joints, in ducts, at installation crossings or in sections with different thermal conditions.
Does RTTR automatically allow a higher load?
No. It is a decision-support input for the operator. The decision must follow the design, procedures and safety requirements.
Can strain also be measured?
Yes, but this requires a separate DSS/DTSS function and a suitable sensing cable. DTS does not automatically measure strain.
Select DTS and RTTR for the specific cable and route
Prepare the cable data, route map, fibre installation method, load profile and integration requirements.
Technical sources: Luna LIOS EN.SURE · Silixa ULTIMA · Silixa XT-DTS
