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Buried cable temperature monitoring

Jam
Hi all,


I am aware of tell-tale temperature stickers that can be placed on cables, conductors etc where overload is suspected. However, once buried this would of course be rather hard to inspect, certainly on a regular basis!


Does anyone have any recommendations for cable temperature monitoring setups that could be retrofitted relatively simply and connected to an existing data acquisition system, posssibly to trigger load reduction if necessary but that might be the advanced course.


I'm thinking of a few thermocouple patches under wraparound sleeving for waterproofing, going into a suitable device above ground, but this kind of sensor isn't my area and I don't want to reinvent the wheel if possible.


Thanks in advance,


J
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    Hi Jam,


    We have used a retrofit Cable Temperature Monitoring solution for 15 years, connected to our SCADA. The cable is 300mm2 three core, and we use real time monitoring with a doped fibre optic sensor cable in two locations. The fibre allows measurement along a length, rather than taking spot temperatures. Although this is sheath temperature, we do have a calculation that gives an approximation of core temperature. Using the stored results, we have a new agreed power level with our insurers that gives us another 50% capacity based on its original installed capacity. I don’t want to discuss the technical detail on an open forum, but if you PM me a phone number or email address I would be happy to discuss my experiences, 


    Regards,


    Alan.
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  • 0
    Hi Jam,


    We have used a retrofit Cable Temperature Monitoring solution for 15 years, connected to our SCADA. The cable is 300mm2 three core, and we use real time monitoring with a doped fibre optic sensor cable in two locations. The fibre allows measurement along a length, rather than taking spot temperatures. Although this is sheath temperature, we do have a calculation that gives an approximation of core temperature. Using the stored results, we have a new agreed power level with our insurers that gives us another 50% capacity based on its original installed capacity. I don’t want to discuss the technical detail on an open forum, but if you PM me a phone number or email address I would be happy to discuss my experiences, 


    Regards,


    Alan.
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