Medium voltage heater element

Details Medium voltage heater element Medium voltage heater element

2008-05-13

2008-05-13

Fuqua, Shawntina (Department: 3742)

Electric heating

Heating devices

With heating unit structure

C219S618000, C219S624000, C219S628000, C219S629000, C219S630000, C219S059100, C219S067000, C219S236000, C219S243000, C219S437000, C219S523000, C219S534000, C219S535000, C219S541000, C219S542000

Reexamination Certificate

active

07372007

ABSTRACT:
An electrical heater bundle has heater elements, each including a metal tube, an electrical resistance coil within the tube, a conductor pin connected to the coil and protruding from an end of the tube, and an electrical insulation powder surrounding the coil within the tube. A conical cavity is located in the insulation powder at the end of the tube, the cavity extending from an inner diameter of the tube to the conductor pin. The cavity is filled with an epoxy that is cured in place. The insulation powder may have an infiltrated layer at the cavity that is an uncured liquid silicone. The heater elements are mounted to a header plate, and the elements associated with the three different phases of electrical power may protrude past the header plate at different distances.

REFERENCES:
patent: 5396574 (1995-03-01), Base et al.

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