Skin effect system consist of thermally rated ,electrical insulated wire installed inside a ferromagnetic heat tube .the insulated wire is connected to heat tube at the end termination and of heating cable .AC current flows from wire and returning on the inside surface of tube. the skin effect system is electrically safe and produce heat in ferromagnetic tube through the effect of two well known electrical phenomena.
skin effect and proximity effect, these factors caused the current following in the heat tube to be concentrated on the inner surface: the current concentration is so complete there is virtually no measurable voltage on the outer wall of heat tube. Heat is also generated due to resistance of heat tube ,so heat tube is attached with pipe and completely covered with insulation, heat is efficiently transferred into the process pipe.
