Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1976-06-01
1978-02-21
Tokar, M.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 54, G01R 3102
Patent
active
040755495
ABSTRACT:
An electrical surge arrester tester comprising two surge arrester test leads and a voltage generator for generating and applying DC voltage of continuously increasing magnitudes to the surge arrester test leads. A monitor is provided for continuously and simultaneously monitoring the magnitude of DC voltages being applied to, and the current being conducted across, the surge arrester test leads. A counter is provided for digitally recording the monitored firing voltage when the monitored current exceeds a preselected magnitude. A terminator circuit is provided for terminating the generation and application of voltage by the voltage generator upon recording of the firing voltage. A digital display is also provided for displaying the digitally recorded firing voltage.
A method of testing an electrical surge arrester comprising the steps of applying DC voltages of continuously increasing magnitudes to a surge arrester; monitoring the continuously increasing voltages being applied to the surge arrester while simultaneously monitoring the current being conducted therethrough; sequentially entering the monitored increasing magnitudes of voltage into a digital memory; detecting a surge of current through the surge arrester and in response thereto reducing the magnitude of voltage being applied to the surge arrester, and displaying the voltage entered into digital memory at the time of detected surge current through the surge arrester.
REFERENCES:
patent: 3970924 (1976-07-01), Pendleton
H. Linck, Lightning Arrester Field Test Equipment, Paper 59-216, Oct. 1959, pp. 890-895.
GW Electronics, Inc.
Kennedy Robert B.
Tokar M.
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