Lighting arrester tester

Details Lighting arrester tester Lighting arrester tester

1990-04-16

1992-02-11

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324546, 324551, 324553, 361 40, G01R 3100, G01R 3112

Patent

active

050878859

ABSTRACT:
A portable tester is disclosed for determining in the field the condition of a lightning arrester connected in parallel with a high voltage winding of a transformer. The tester comprises a battery; an inverter connected to the battery for generating an AC output; at least one transformer and a rectifier for transforming the output of the inverter to a high voltage DC having a magnitude greater than the breakdown voltage of a lightning arrester connected in paralled to the high voltage winding of a transformer being tested; at least one capacitor connected across the rectifier for being charged to the high voltage DC; an overvoltage spark gap switch for discharging the high voltage charge of the capacitor across the high voltage winding of the transformer being tested; and a storage oscilloscope for detecting the response of the winding to the high voltage pulse. A normally functioning lightning arrester will clamp the voltage across the transformer winding at the arrester's known breakdown point.

REFERENCES:
patent: 3443223 (1969-05-01), Kennon
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patent: 3846698 (1974-12-01), Lawton
patent: 4117397 (1978-09-01), Fukao et al.
patent: 4266184 (1981-05-01), Devine
patent: 4577148 (1986-03-01), Sweetana
patent: 4621298 (1986-11-01), McMillen
patent: 4757263 (1988-07-01), Cummings et al.
patent: 4803436 (1989-02-01), Kresge et al.

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