Electricity: measuring and testing – Electromechanical switching device – Relay
Patent
1998-03-09
2000-09-26
Metjahic, Safet
Electricity: measuring and testing
Electromechanical switching device
Relay
324210, 324546, G01R 3102
Patent
active
061247146
ABSTRACT:
A lightning arrester tester includes two tubular poles respectively carrying probe terminals, one probe terminal being connected in series through a high-voltage rectifier and high-resistance circuit disposed within the pole to one terminal of a DC microammeter mounted on the outside of the one pole, the other probe terminal being connected through a high-resistance circuit housed within the second pole to the other meter terminal. A diode is connected in parallel with the meter to protect the meter from high leakage currents. In use, the probe terminals are respectively connected to a high-voltage power transmission or distribution line and one terminal of an arrester, the other terminal of which is grounded or, alternatively, to ground and to one terminal of an arrester, the other terminal of which is connected to a high-voltage power transmission or distribution line. The meter displays DC leakage current through the arrester.
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HD Electric Brochure 1992 (no month available).
Hoffman Mark R.
McNulty William J.
HD Electric Company
Metjahic Safet
Nguyen Vincent Q.
Shaw Seyfarth
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