Insulators having improved steep wave front characteristics

Details Insulators having improved steep wave front characteristics Insulators having improved steep wave front characteristics

1987-10-26

1988-11-01

Askin, Laramie E.

Electricity: conductors and insulators

Insulators

With terminal elements

174182, 174209, 501 21, 501 70, H01B 1750, C03C 802

Patent

active

047821990

ABSTRACT:
A high voltage porcelain insulator having a glaze applied to at least a head portion of the insulator which head portion is covered by a metal fitting and a cement. The glaze essentially consists of, in terms of weight, from 64.0 to 68.0% of SiO.sub.2, from 17.5 to 19.0% of Al.sub.2 O.sub.3, from 5.0 to 6.5% of MgO, not more than 3.0% of CaO, from 2.0 to 2.8% of K.sub.2 O and Na.sub.2 O in a total amount, and from 3.0 to 9.0%, when calculated as MnO, a compound which is converted to MnO and or MnO.sub.2 after being fired at a temperature range suitable for firing porcelain.

REFERENCES:
patent: 2157100 (1939-05-01), Rowland
patent: 2250044 (1941-07-01), Croskey et al.
patent: 2287976 (1942-06-01), Croskey et al.
patent: 2389386 (1945-11-01), Russell, Jr.
patent: 3024303 (1962-03-01), Smothers et al.
patent: 3097101 (1963-07-01), Lester
EPRI, Nov., 1977, "Improvement of Mechanical and Electrical Strength of Porcelain Insulators".

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