Title:
電源変圧器の保護の改良またはそれに関連する改良
Document Type and Number:
Japanese Patent JP7403952
Kind Code:
B2
Abstract:
In the field of power transformer protection there is provided a method of protecting a power transformer comprising the steps of:
(a) monitoring an external fault indication signal (12A, 12B, 12C);
(b) carrying out locally a fault determination;
(c) carrying out locally an inrush current determination; and
(d) issuing a final trip signal (48) to protect the power transformer if:
(i) the external fault indication signal (12A, 12B, 12C) identifies that a fault has occurred and the locally carried out fault determination confirms that a fault has occurred; or
(ii) the external fault indication signal (12A, 12B, 12C) identifies that a fault has occurred and the locally carried out fault determination identifies that no fault has occurred but after a predetermined delay the locally carried out inrush current determination confirms the absence of an inrush current.
Inventors:
Ha, Hengsu
Wen, you
Balakrishnan, Gajendyran
Wen, you
Balakrishnan, Gajendyran
Application Number:
JP2018537727A
Publication Date:
December 25, 2023
Filing Date:
October 12, 2016
Export Citation:
Assignee:
General Electric Technology GmbH
International Classes:
H02H7/04; H02H3/093; H02H7/045
Domestic Patent References:
| JP9322379A | ||||
| JP62110433A | ||||
| JP10257667A | ||||
| JP200415861A | ||||
| JP11252781A | ||||
| JP2003259544A | ||||
| JP5137243A | ||||
| JP1141793A |
Foreign References:
| US6483680 |
Attorney, Agent or Firm:
Hiroshi Ogura
Toshihisa Kurokawa
Ryoichi Sawaki
Toshihisa Kurokawa
Ryoichi Sawaki
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