Surge arrester equipped for monitoring functions and method of u

Details Surge arrester equipped for monitoring functions and method of u Surge arrester equipped for monitoring functions and method of u

1982-12-17

1986-03-18

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Testing potential in specific environment

Voltage probe

324 51, 324102, 361127, G01R 3102

Patent

active

045771480

ABSTRACT:
A metal oxide type surge arrester is provided with a plurality of arrester blocks in series within a housing having, in addition to line and ground terminals at the extremities, a bushing providing a tap voltage terminal intermediate the series stack such as between the bottom two arrester blocks. The provision of the voltage tap and a shunt resistance in series with the ground terminal permits respectively detecting the voltage and the current of the arrester so that they can be compared and their phase relation observed to determine if the arrester blocks are maintaining a capacitive characteristic or have become resistive. In addition, several other methods of use of such an arrester for monitoring line voltage, energy absorption, fault current and the like are disclosed.

REFERENCES:
patent: 3125720 (1964-03-01), Swift
patent: 3264563 (1966-08-01), Arnold
patent: 3443223 (1969-05-01), Kennon
patent: 3469188 (1969-09-01), Hall
patent: 4075549 (1978-02-01), Woodward
patent: 4157496 (1979-06-01), St. Jean
patent: 4223366 (1980-09-01), Sweetana, Jr. et al.
patent: 4327390 (1982-04-01), Despiney
patent: 4389693 (1983-06-01), Yanabu et al.
Diefenderfer, James A., Principles of Electronic Instrumentation, 2nd Ed., 1979, pp. 101-105.

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