Partial discharge detection method and apparatus
OwnerSteven R. Campbellinventor
Life of this patent
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Abstract
A method and device for detecting a partial discharge pulse in a high voltage conductor in the stator of a motor, turbine generator or the like, comprising a conductive plate having an insulated face, an insulated signal conductor spanning the insulated face of the plate, and means for transmitting an electrical pulse produced in the signal conductor to recording means for determining the location and severity of partial discharge activity within the high voltage insulation of the conductor.
Claims10
A detection device for detecting a partial discharge pulse in a high voltage conductor comprising:
- a conductive plate having an insulated face;
- an insulated signal conductor spanning a portion of the insulated face and electrically insulated from the conductive plate;
- means for recording an electrical pulse;
- and
- means for transmitting the electrical pulse from the signal conductor to the recording means
- whereby partial discharge activity along the high voltage conductor is directionally coupled to the signal conductor inducing a pulse which is transmitted to the recording means.
A method for detecting partial discharge activity in a stator bar in a motor or turbine generator or the like utilizing the detection device defined in claim comprising:
- affixing the conductive plate adjacent to a stator slot with its insulated face abutting the stator core and the signal conductor parallel to the stator slot;
- measuring the voltage and frequency of a pulse produced in the signal conductor;
- and
- comparing such measurements with predetermined values to determine the nature, magnitude or location of partial discharge activity.
Dependencies are inferred from the claim text.