Electrical insulating system

Details Electrical insulating system Electrical insulating system

1982-05-10

1984-05-22

Kittle, John E.

Inductor devices

With outer casing or housing

Fluid insulation

252567, 252575, 174 17LF, 174110P, 162138, 162158, 336206, 336232, H01F 2732, H01B 318

Patent

active

044504241

ABSTRACT:
An insulating system is described that incorporates a cellulosic material which is impregnated with a nitrogen content no less than 0.2% by weight and a overall density not greater than 0.9 gm/cm.sup.3. This cellulosic material when impregnated by a dielectric liquid such as transformer oil, exhibits a more uniform electrical stress distribution than papers having a density greater than 0.9 gm/cm.sup.3. The insulating system thereformed is particularly useful for application in low stress areas such as the layer insulation in a distribution class transformer.

REFERENCES:
patent: 2505545 (1950-04-01), Hopkins et al.
patent: 2535690 (1950-12-01), Miller et al.
patent: 2722561 (1955-11-01), McCulloch
patent: 3102159 (1963-08-01), Ford
patent: 3135627 (1964-06-01), Sadler
patent: 3211516 (1965-10-01), Sadler
patent: 3224902 (1965-12-01), Sadler et al.
patent: 3429819 (1969-02-01), Tierney
patent: 3617438 (1971-11-01), Nakao et al.

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