HEAT-RESISTANT CABLE WITH ALTERNATION OF "COLD" AND "HOT" ZONES (THREE VERSIONS) Russian patent published in 2010 - IPC H05B3/48 

FIELD: electricity.

SUBSTANCE: invention relates to cable items intended for use mainly in nuclear power engineering. According to the first version, cable consists of metal heat-resistant corrosion-resistant shell filled with mineral insulation and also of current conductor installed coaxially inside shell. Conductor is made of current-conducting material with high specific electric resistance and has various diametre in "cold" and "hit" zones, besides transfer from one zone to the other one is arranged as stepped. In cable according to the second version conductor is arranged as combined, with application of bimetal in zones with lower electric resistance. In cable according to the third version conductor is made as combined, with application of bimetal in "cold" zones, and with various diametre of current conductor in "cold" and "hot" zones, besides transfer from one zone to another one is arranged as stepped.

EFFECT: invention provides for highest accuracy of conductor division into zones and achievement of higher temperatures difference in "cold" and "hot" zones.

18 cl, 5 dwg, 3 ex