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INTRODUCTION TO HIGH POTENTIAL TESTING
figure page 1 Typical Curve of Electrical Strength vs Time
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a-c test absorption current adjustable alternating current alternating-current high potential alternating-current test set application breakdown strength breakdown voltage cable capacitance current capacitor cathode cause charging current circuit breaker components conductor connected corona detector corona discharge corona test set current flow curve dielectric strength direct current direct-current high potential direct-current test sets discharge electrical electrodes equipment failure field Figure flashover frequently full voltage go/no-go ground high potential test high voltage test high voltage transformer indication input insulating material insulation resistance tests item under test leakage current load low voltage measurements meter microammeter microamperes milliammeter milliamperes neon lamp operator oscilloscope output voltage permit potential test set primary production testing rate of rise rectifiers resistor sample SECTION sensitive spark gap specifications sphere gap step-up transformer supply surface surges switch test cage test fixture tion unit usually voltage is raised voltage ranges voltmeter volts wave shape zero