Sensing arrangement
AssigneeABB Schweiz AG
InventorsJörg Gebhardt, Holger Kaul, Kai Hencken
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Abstract
A sensing arrangement for detection of electrical discharges in an electrical apparatus is described. The sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region. The acoustic sensor is positioned outside the funnel region on an apex side of the funnel region. An electrical switchgear is described. The electrical switchgear includes a sensing arrangement for detection of electrical discharges in an electrical apparatus. The sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region.
Claims19
A sensing arrangement for detection of electrical discharges in an electrical apparatus, wherein the sensing arrangement comprises an acoustic sensor and a signal enhancing structure with a funnel region, wherein the acoustic sensor is positioned outside the funnel region on an apex side of the funnel region, wherein in the funnel region, a part of a surface of the signal enhancing structure has an exponential-like cross section, and wherein the signal enhancing structure is configured as a high-pass filter with a cut-off frequency higher than 10 kHz.
A sensing device, including an enclosure and a sensing arrangement for detection of electrical discharges in an electrical apparatus, wherein the sensing arrangement comprises:
- an acoustic sensor and a signal enhancing structure with a funnel region, wherein the acoustic sensor is positioned outside the funnel region on an apex side of the funnel region, wherein the signal enhancing structure of the sensing arrangement is embedded into the enclosure, wherein in the funnel region, a part of a surface of the signal enhancing structure has an exponential-like cross section, and wherein the signal enhancing structure is configured as a high-pass filter with a cut-off frequency higher than 10 kHz.
An electrical switchgear, including a sensing arrangement for detection of electrical partial discharges in an electrical apparatus, wherein the sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region, wherein the acoustic sensor is positioned outside the funnel region on an apex side of the funnel region, wherein in the funnel region, a part of a surface of the signal enhancing structure has an exponential-like cross section, and wherein the signal enhancing structure is configured as a high-pass filter with a cut-off frequency higher than 10 kHz.
A method for detecting electrical discharges, the method comprising:
- operating a sensing arrangement for detection of electrical discharges in an electrical apparatus, wherein the sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region, wherein the acoustic sensor is positioned outside the funnel region on an apex side of the funnel region, wherein in the funnel region, a part of a surface of the signal enhancing structure has an exponential-like cross section, and wherein the signal enhancing structure is configured as a high-pass filter with a cut-off frequency higher than 10 kHz.
Dependencies are inferred from the claim text.