Voltage non-linear resistor and its manufacture

Details Voltage non-linear resistor and its manufacture Voltage non-linear resistor and its manufacture

1987-02-27

1988-02-09

Goldberg, E. A.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

338 21, 252518, 252519, 29610R, H01C 710

Patent

active

047244160

ABSTRACT:
A voltage non-linear resistor excellent in lightning discharge current withstanding capability and electrical life performance against applied voltage comprises a disclike voltage non-linear element and a thin insulating covering layer integrally provided on the side surface of the element. In the resistor according to the invention, the element contains zinc oxides as main ingredient, 0.1-2.0% bismuth oxides, as Bi.sub.2 O.sub.3, 0.1-2.0% cobalt oxides, as Co.sub.2 O.sub.3, 0.1-2.0% manganese oxides, as MnO.sub.2, 0.1-2.0% antimony oxides, as Sb.sub.2 O.sub.3, 0.1-2.0% chromium oxides, as Cr.sub.2 O.sub.3, 0.1-2.0% nickel oxides, as NiO, 0.001-0.05% aluminum oxides, as Al.sub.2 O.sub.3, 0.005-0.1% boron oxides, as B.sub.2 O.sub.3, 0.001-0.05% silver oxides, as Ag.sub.2 O and 1-3% silicon oxides, as SiO.sub.2, and the layer contains 80-96% silicon oxides, as SiO.sub.2, 2-7% bismuth oxides, as Bi.sub.2 O.sub.3 and antimony oxides for the remainder (% stands for mole %). The resistor of the invention preferably further has a thin glassy layer superimposed on the insulating covering layer. The resistors are advantageously adaptable to arrestors, surge absorbers used in high voltage power systems.

REFERENCES:
patent: 4386021 (1983-05-01), Kazuo et al.
patent: 4551268 (1985-11-01), Eda et al.

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