Title: Within the convention priority year
Application Number: 95106384 Application Date: 1995.05.22
Publication Number: 1117199 Publication Date: 1996.02.21
Approval Pub. Date: 1999.04.21 Granted Pub. Date: 1999.04.21
International Classifi-cation: H01H33/70
Applicant(s) Name: Hitachi, Ltd. Address:
Inventor(s) Name: Hitoshi Yamada;Masatomo Ohno;Manabu Takamoto
Attorney & Agent: LIU ZHIPING
Abstract:
    A gas circuit breaker having a resistance circuit breaking portion connected in parallel with a main circuit breaking portion includes a main circuit breaking portion actuating mechanism and a resistance circuit breaking portion actuating mechanism. The resistance circuit breaking portion actuating mechanism is provided with a first delaying mechanism mechanically coupled to the main circuit breaking portion actuating mechanism, and a second delaying mechanism, independent from the first delaying mechanism, which is operated by an electrical command signal to the main circuit breaking portion actuating mechanism. The otherwise possible thermal break-down of a resistor connected in series with the resistance circuit breaking portion is prevented.
Time: 9