Variable power limiting heat tracing cable

Details Variable power limiting heat tracing cable Variable power limiting heat tracing cable

H - Electricity

05

B

H05B 3/40 (2006.01) H05B 3/56 (2006.01)

Patent

CA 2174615

A heating cable includes a pair of elongated electrode wires, each of which is coated with a first layer of insulating material. The first layer of insulating material is at least partially stripped off selected ones of the wires at spaced, alternating locations. A resistive heater wire, together with a yarn of fibrous insulating material, is spirally wound around the electrode wires whereby the heater wire is brought into electrical contact with selected ones of the electrode wires at the alternating locations, to electrically connect the alternating locations with the resistive heater wire. A second layer of an insulating material is provided over the resistive heater wire and insulating material, forming an outer surface for the cable.

Câble chauffant comprenant une paire de fils électrodes allongés, chacun étant revêtu d'une première couche de matériau isolant. La première couche de matériau isolant est au moins partiellement retirée de certains fils choisis en des points alternants espacés. Un fil chauffant résistant, avec une gaine isolante fibreuse, est enroulé en spirale autour des fils électrodes, ce qui met le fil chauffant en contact électrique avec les fils électrodes choisis aux points alternants, pour raccorder électriquement les points alternants avec le fil chauffant résistant. Une deuxième couche de matériau isolant recouvre le fil chauffant résistant et sa gaine isolante et forme la surface extérieure du câble.

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