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Medium Voltage Inductive Heating

Medium Voltage Inductive Heating

Medium Voltage Inductive Heating

(OP)
I thread in another forum has sparked my curiosity. The subject being the practice of utilities transitioning from overhead to underground (66KV) with the insulated (UG)cables entering a steel pole through individual holes. Since there is no mutual canceling of phases with this arrangement is there ever a problem with inductive heating? Does the shield around the cable have any effect in minimizing this?

RE: Medium Voltage Inductive Heating

Shielding on the cables is for voltage field control - NOT magnetic field control.  It is entirely possible to use non-magnetic steels for a structural member and route all three phases, individually, through the same plate.  Large transformers do this all the time.

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