2012 SuStainability RepoRt
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| pRySmian gRoup | 2012 SuStainability RepoRt
make a contribution in this regard.
a dtS (distributed temperature Sensing) instrument is
able to sense temperature using fibres placed in proximity
to hV cables. the measure provides a complete description
of the temperature along the whole length of the cable
monitored, since several fibres can be connected to the
same instrument.
the RttR (Real time thermal Rating) system is one of
the advanced asset management solutions proposed by
prysmian. this system processes the data gathered by
the dtS instrument and checks the state and condition of
the hV and uhV cables monitored, with reference to both
current and previous temperatures.
for all power transmission links with an RttR system
attached, the real-time information available includes
the maximum temperature of the cables and accessories
(joints, terminals etc.), the power that can be transmitted
safely, both continuously and in bursts of any duration.
this real-time monitoring, combined with forecast thermal
behaviour in current and future conditions, makes it
possible to employ safety procedures that, via automated
advance warnings, highlight the risk of overheating and
instability with thermal run-out.
Various utilities currently use RttR systems supplied
by prysmian. they have determined that these systems
allow an increase of up to 9% in the loads transmitted
via underground cables, without any loss of safety.
considering medium-term operational overloads, the
possible increase rises to 12-15%.
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