Wet/dry hot stick tester

Details Wet/dry hot stick tester Wet/dry hot stick tester

G - Physics

01

R

G01R 31/12 (2006.01) G01R 31/14 (2006.01)

Patent

CA 2186439

A wet/dry hot stick tester designed to provide a dry test of a hot stick being tested by applying a voltage equivalent to 100 Kv/ft to the hot stick, and to provide a wet test of a hot stick being tested by applying a voltage equivalent to 75 KV/ft to the hot stick. The hot stick tester has output electrodes positioned along a reading aperture provided in a housing of the hot stick tester, in which a hot stick being tested is positioned. A two tap transformer has a first input tap for providing a first voltage equivalent to a 100 KV/ft to a hot stick positioned in the reading aperture during a dry test thereof, and has a second input tap for providing a. second voltage equivalent to a 75.KV/ft to a hot stick positioned in the reading aperture during a wet test thereof. An ammeter is provided for measuring the leakage current through the hot stick positioned in the reading aperture during an applied voltage. A wet/dry switch is provided for switching the two tap transformer between the first and second input taps. The wet/dry switch comprises a ganged switch, a first set of contacts of which switches between the first and second input taps of the transformer, and a second set of contacts of which switches a resistor into and out of a control circuit between the output electrodes and one output coil of the transformer and an input to an operational amplifier which drives the ammeter.

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