Title:
電流差動リレー装置
Document Type and Number:
Japanese Patent JP7418245
Kind Code:
B2
Abstract:
A current differential relay apparatus includes a first relay and a second relay. The first relay calculates a first differential current and a first suppression current, using a first current and a second current, and performs a ratio differential relay operation based on the first differential current and the first suppression current. The second relay calculates a maximum of results of add operations of the first current and the second current as a second differential current, calculates an add operation of the maximum of the first current and a maximum of the second current as a second suppression current, and performs a ratio differential relay operation based on the second differential current and the second suppression current. The current differential relay apparatus includes an output controller that outputs an operation signal based on results of operations performed by the first and second relays.
Inventors:
Shigeto Oda
Application Number:
JP2020034835A
Publication Date:
January 19, 2024
Filing Date:
March 02, 2020
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02H3/28; H01H47/14
Domestic Patent References:
| JP2009207335A | ||||
| JP2004088919A |
Foreign References:
| US6442010 |
Attorney, Agent or Firm:
Patent Attorney Fukami Patent Office
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