Device for detecting open phase of connection line of standby transformer in nuclear power plant by using Rogowski coil
US9714974B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2014 |
| Grant date | Jul 25, 2017 |
| Priority date | — |
| Expiry date | Sep 1, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/62
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a device for detecting an open phase of a connection line of a standby transformer in a nuclear power plant by using a Rogowski coil. A Rogowski coil is provided to a neutral line of a Y connection at the primary side of the standby transformer. An open phase detection unit is provided for determining the generation of an open phase at the primary side and generating a warning signal if a current induced in the Rogowski coil is maintained at a value higher than a preset reference value for a time longer than a preset reference time in a state where a circuit breaker at the secondary side of the standby transformer is open. A main control unit is provided for displaying the warning to an administrator according to the warning signal provided by the open phase detection part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.