| 摘要 |
A wet/dry hot stick tester designed to provide a dry test of a hot stick by applying a voltage equivalent to 100 KV/ft to the hot stick, and to provide a wet test of a hot stick by applying a voltage equivalent to 75 KV/ft thereto. Output electrodes are 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 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 75 KV/ft to a hot stick during a wet test thereof. An ammeter measures the leakage current through the hot stick during an applied voltage. A wet/dry switch switches the two tap transformer between the first and second input taps. The wet/dry switch comprises a ganged switch with a first set of contacts which switch between the first and second input taps of the transformer, and a second set of contacts which switch 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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