Device and method for testing the operation of a protection unit and protection unit comprising such a test device
US10955475B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | May 8, 2018 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | May 8, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device for testing the operation of a protection unit of an electrical network. The test device includes a generator for generating a pulse train in a secondary winding of a current transformer according to a profile of frequencies such that a measurement of the pulse train after passage through a low-pass filter is lower than a selected trip threshold, and a processing circuit arranged to identify a presence of the pulse train in a signal delivered by a second secondary winding of the current transformer. A protection unit including such a test device and to a method for testing an electrical protection unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.