DC CIRCUIT BREAKER

In a DC circuit breaker, in order to achieve life increase by shortening an interruption time and reducing a wear amount of the contact, and the like, it is effective to quickly commutate an arc generated between contacts at the time of interruption to an arc runner. However, it is difficult to achi...

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Bibliographic Details
Main Authors MATSUMURA, Kohei, NAKATA, Tomohiro, SASAKI, Hiroshi
Format Patent
LanguageEnglish
French
German
Published 17.04.2024
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
RELAYS
SELECTORS
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Summary:In a DC circuit breaker, in order to achieve life increase by shortening an interruption time and reducing a wear amount of the contact, and the like, it is effective to quickly commutate an arc generated between contacts at the time of interruption to an arc runner. However, it is difficult to achieve high-speed commutation over the entire range from a small current region not larger than a rated value to a large current region such as short-circuit current. Therefore, a fixed-side arc runner (12) is shaped to cover a portion around a fixed contact (1), whereby an arc can be commutated at a high speed from the small current region to the large current region, thereby improving interruption performance.
Bibliography:Application Number: EP20210945025