Portable protective air gap tool and method
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United States of America Patent
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Oct 18, 2005
Grant Date -
Apr 10, 2003
app pub date -
Oct 8, 2002
filing date -
Oct 9, 2001
priority date (Note) -
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Abstract
A method for designing and validating a portable protective air gap (PPAG) device for use by workmen doing live-line maintenance on a electrical voltage transmission line network. The method sets out the procedure for optimizing the starting gap distance for a particular PPAG to be used for a given nominal system voltage. Validation testing then follows to achieve final, recommended values. PPAG devices employing axially aligned, hemispherically tipped, first and second electrodes for use on 115/138 kV, 230 kV and 345 kV voltage networks are designed using the methodology of the invention.
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