Apparatus and method for detecting disconnection in secondary side of current transformer
US10305272B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2017 |
| Grant date | May 28, 2019 |
| Priority date | — |
| Expiry date | Jan 13, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/66
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for detecting disconnection of a secondary side of a current transformer includes a sampling circuit coupled to the secondary side of the current transformer that samples signals from the secondary side of the current transformer. A pull-up circuit is switchably coupled to the sampling circuit in response to a coupling signal in a diagnostic phase. A processor is coupled to the sampling circuit for receiving sampled signals from the sampling circuit. The processor extracts corresponding signal information from the sampled signals and stores the extracted signal information in a memory. The extracted signal information corresponds to statuses that the secondary side of the current transformer is connected or disconnected to a load. A detector is coupled to the processor and the memory, and accesses the memory using the signal information of the sampled signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.