High voltage insulators

Details High voltage insulators High voltage insulators

1983-04-18

1984-10-09

Kittle, John E.

Coating processes

Electrical product produced

427387, 174137A, 174137B, 252573, B05D 512, H01B 1700

Patent

active

044761554

ABSTRACT:
A method of manufacturing an improved electrical high voltage coated insulator is described. The method involves applying and curing a one-part, room temperature curable silicone composition to the surface of an insulator, the insulator surface having a minimum designated arc resistance. The silicone composition is the product obtained by mixing in the substantial absence of moisture a specified polydimethylsiloxane fluid containing hydroxyl radicals, finely divided aluminum hydroxide filler, a silane of the formula R.sub.b Si(ON.dbd.X).sub.4-b and an optional condensation catalyst. The coating cures on exposure to atmospheric moisture to produce a surface adhered onto the insulator that resists the development of leakage currents and flashover failure upon exposure to electrical stress, moisture, contamination, and other outdoor weathering stresses.

REFERENCES:
patent: 3511698 (1970-05-01), Talcott
patent: 3965065 (1976-06-01), Elliott
patent: 4001128 (1977-01-01), Penneck
patent: 4011168 (1977-03-01), Uhlman
patent: 4177322 (1979-12-01), Homan et al.
patent: 4189392 (1980-02-01), Penneck
Niemi, "Self-Priming Silicone Elastomeric Coating for High Voltage Insulator Bodies," 10th Electrical Insulation Conference.

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