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Patent
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H01H 33/64 (2006.01) H01H 33/88 (2006.01)
Patent
CA 1088982
ELECTROMAGNETIC PUFFER TYPE GAS CIRCUIT BREAKER ABSTRACT OF THE DISCLOSURE An electromagnetic puffer type gas circuit breaker comprises two opposing puffer type gas circuit breaking units mounted on midway support means, actuating means for driving the circuit breaking units, an electromagnetic actuating unit drivingly coupled to the actuating means, and current transfer mechanism for transferring and applying the interrupting current to the electromagnetic actuating unit during a circuit breaking operation. The current transfer mechanism is located, in operative connection to the actuating means, at a point above the midway support means and in a spaced relation to the electromagnetic actuating unit. The contact surface area of the current- conducting path portion leading to the transfer mechanism is a fraction of that of another current- conducting path portion for the passage of most of the rated current. These features provide ease of inspection and replacement of the current transfer mechanism and reduces the operating force requirement of the breaker.
280497
Hirasawa Kunio
Kashimura Katsuichi
Koyanagi Osamu
Tsukushi Masanori
Yoshioka Yoshio
Hitachi Ltd.
Kirby Eades Gale Baker
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