Input circuit for current transformer
US9588148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2015 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Apr 9, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R1/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transformer for monitoring current in a power cable is magnetically linked with the power cable connected to the electrical device, where the transformer produces a changing transformer signal in response to the presence of a changing current within the power cable. An input circuit located proximate to the transformer and having an output terminal and being electrically connected to the transformer so as to receive the changing transformer signal. The input circuit produces, in response to receiving the changing transformer signal, one of a first signal representative of the changing current, and a first circuit condition at the output terminal of the input circuit representative of the changing current in the power cable. The input circuit includes an impedance set having an effective impedance that comprises a plurality of elements, wherein at least one of the elements is not electrically connected to the remaining the plurality of elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.