Title:
DC CIRCUIT BREAKER
Document Type and Number:
WIPO Patent Application WO/2022/259347
Kind Code:
A1
Abstract:
In this DC circuit breaker, it is effective, when breaking, to quickly commutate an arc generated between contacts to an arc runner in order to shorten breaking time and extend the lifetime of the circuit breaker by reducing the amount of wear of the contacts. However, it is difficult to achieve high-speed commutation over the entire range from a small current region at or below the rated value to a large current region of the short-circuit current. Therefore, by forming a fixed side arc runner (12) in a shape that covers the surroundings of a fixed contact (1), an arc can be commutated at a high speed from the small current region to the large current range, and thus breaking performance can be improved.
Inventors:
MATSUMURA KOHEI (JP)
SASAKI HIROSHI (JP)
NAKATA TOMOHIRO (JP)
SASAKI HIROSHI (JP)
NAKATA TOMOHIRO (JP)
Application Number:
PCT/JP2021/021668
Publication Date:
December 15, 2022
Filing Date:
June 08, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H01H9/38; H01H73/02; H01H73/18
Foreign References:
| JP2014175113A | 2014-09-22 | |||
| JPS62139024U | 1987-09-02 | |||
| JPH0922645A | 1997-01-21 | |||
| JP2016033891A | 2016-03-10 | |||
| JP2001160348A | 2001-06-12 | |||
| JP2010170876A | 2010-08-05 | |||
| JP2010170876A | 2010-08-05 |
Attorney, Agent or Firm:
PALMO PATENT FIRM, P.C. (JP)
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