FIELD: electrical heating devices, namely coaxial cables for heating different size and shape objects, possibly in building, transport vehicles, agriculture and in different industry branches.
SUBSTANCE: cable includes inner and outer wire connected in series one with another and coaxially arranged with annular gap between them; inner heat insulation envelope filling said gap. Relation of sizes of cross sections of wires is in range 
where R - inner radius of outer wire, mm; r - radius of inner wire, mm; 
- effective penetration depth of alternating electric current, mm.
EFFECT: enlarged using range of cable, enhanced ecological, electric, fire safety, increased flexibility, length, reliability and useful life period, lowered energy and metal consumption, reduced cost of exploitation and manufacture.
8 cl, 3 dwg
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| COAXIAL FIN-LINE COMMUNICATION | 1987 |
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SU1840500A1 |
| COAXIAL CABLE | 1989 |
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RU1595247C |
