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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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  • 0
    If already existing cables are suspected to be marginal or at risk of overheating, It might be worth considering the following.


    1) What is the power factor like ? 0.85 is usually considered acceptable, but improvement to unity might be worth considering as it will reduce the amps for a given load in KW.


    2) Is the load balanced ? an unbalanced load will increase cable heating.


    3) Could grid tied solar be installed on the buildings supplied by the cables. This will reduce the net load during daylight and assist in reducing cable temperatures.


    4) General energy saving measures, and in particular LED lighting can reduce loading and be worthwhile. What sort of loads are supplied ? any other oportunities for power saving ?


    5) What is the actual voltage at the load, if unduly low this may increase the amps used for a fixed load in KW.
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  • 0
    If already existing cables are suspected to be marginal or at risk of overheating, It might be worth considering the following.


    1) What is the power factor like ? 0.85 is usually considered acceptable, but improvement to unity might be worth considering as it will reduce the amps for a given load in KW.


    2) Is the load balanced ? an unbalanced load will increase cable heating.


    3) Could grid tied solar be installed on the buildings supplied by the cables. This will reduce the net load during daylight and assist in reducing cable temperatures.


    4) General energy saving measures, and in particular LED lighting can reduce loading and be worthwhile. What sort of loads are supplied ? any other oportunities for power saving ?


    5) What is the actual voltage at the load, if unduly low this may increase the amps used for a fixed load in KW.
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