Method and device for detecting partial discharges
First Claim
1. A device for detecting partial discharges in an electrical apparatus disposed in a tank filled with oil, wherein the tank wall is provided with at least one drain tap, the device comprising a probe mounted on a carrier which is movable through the drain tap into the tank.
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Accused Products
Abstract
A method and device for detecting partial discharges in an electrical apparatus placed in a tank filled with oil, wherein the tank wall is provided with at least one drain tap. The device includes a probe mounted on a carrier that is movable through the opened drain tap into the tank. To move the probe into the tank while avoiding leakage of the oil, a sleeve maybe coupled to a flange of the drain tap an the carrier may be moved within the sleeve. The probe may be moved so that it at least coincides with the inner surface of the tank wall, or even further, and then measurements may be performed to detect partial discharges.
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Citations
13 Claims
- 1. A device for detecting partial discharges in an electrical apparatus disposed in a tank filled with oil, wherein the tank wall is provided with at least one drain tap, the device comprising a probe mounted on a carrier which is movable through the drain tap into the tank.
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4. A method for detecting partial discharges in an electrical apparatus disposed in a tank filled with oil, wherein the tank wall is provided with at least one drain tap, the method comprising the steps of:
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coupling a sleeve to a flange of the drain tap and a carrier which is movable in the sleeve and on which a probe is disposed;
moving the probe through the opened drain tap at least until a measuring surface of the probe coincides with the inner surface of the tank wall; and
performing a measurement by the probe. - View Dependent Claims (5)
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6. A device for detecting a partial discharge in a tank containing an electrical apparatus and an insulating fluid around the electrical apparatus, the tank having at least one drain tap, the device comprising:
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a sleeve configured to be coupled to the drain tap; and
an elongated carrier disposed within the sleeve, the carrier having a probe configured to detect the partial discharge, the carrier being configured to be moveable within the sleeve such that the probe passes through the drain tap. - View Dependent Claims (7, 8, 9)
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10. A device for detecting a partial discharge in a tank containing an electrical apparatus and an insulating fluid around the electrical apparatus, the tank having at least one drain tap, the device comprising:
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a sleeve configured to be coupled to the drain tap; and
a probe configured to detect the partial discharge, the probe further configured to move within the sleeve such that the probe travels in and out of the drain tap.
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11. A method for detecting a partial discharge in a tank containing an electrical apparatus and an insulating fluid around the electrical apparatus, the method comprising the steps of:
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coupling a sleeve to a drain tap of the tank;
opening the drain tap;
moving a probe through the sleeve in a first direction such that the probe passes through the open drain tap;
using the probe, detecting whether a partial discharge exists within the tank;
moving the probe through the sleeve in a second direction such that the probe passes back out the open drain tap; and
closing the drain tap. - View Dependent Claims (12, 13)
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Specification