METHOD AND APPARATUS FOR HIGH TEMPERATURE SERIES/PARALLEL HEATING USING MINERAL INSULATED AND FERROMAGNETIC SKIN EFFECT CABLE

摘要

A heating cable (10) has a ferromagnetic steel sheath (5) with sections (2, 3, 4) having modified insulation material such as, for example, magnesium oxide blended with an electrically conductive material. Different zones having different insulation generate increased heat output via direct electrical heating of the modified insulation material permitting targeted heating along the length of the cable. The heating cable may be optionally configured as a skin effect heating system, or may be configured with an open end termination.