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Underground Distribution Conductor's Temperature Rating

Underground Distribution Conductor's Temperature Rating

Underground Distribution Conductor's Temperature Rating

(OP)
What does it mean when an underground cable (voltages 5k to 35k Volts) is rated for 90 degrees C temperature rating? Does that mean that the temperature of the conductor shall not exceed 90 degrees Celsius in order to not damage the insulation covering the conductor? In particularly, I am referring to  TR-XLPE and EPR power cables for underground distribution cables.

RE: Underground Distribution Conductor's Temperature Rating

90 Degrees is the specification for the maximum temperature that the copper or aluminium core of the conductor can reach during operation. The current that yeilds this temperature is the maximum continuous rating of the cable.

 

RE: Underground Distribution Conductor's Temperature Rating

(OP)
Is the 90 degrees maximum temperature being driven by the limiting factor set by the insulation on the conductor. Please advice. Thank you

RE: Underground Distribution Conductor's Temperature Rating

Quote:

Is the 90 degrees maximum temperature being driven by the limiting factor set by the insulation on the conductor. Please advice. Thank you
Yes.

RE: Underground Distribution Conductor's Temperature Rating

(OP)
Thank you for the prompt response.

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