GAS BLAST CIRCUIT BREAKER

Title:

GAS BLAST CIRCUIT BREAKER

Document Type and Number:

WIPO Patent Application WO/2014/136513

Kind Code:

A1

Abstract:

A gas blast circuit breaker is constituted by, in a tank filled with arc extinguishing gas: a contact having a pair of separable fixed arc contacts and movable arc contacts; a puffer chamber formed with a puffer cylinder having the movable arc contacts at the tip thereof and a fixed piston; and an insulating nozzle attached to the tip of the puffer cylinder to surround the movable arc contacts and forming a flow channel for guiding the arc extinguishing gas from the puffer chamber to the contact. The puffer cylinder (104) has a cylinder portion (104a) at the end on the breaker section side, and a hollow main movable contact (102) is arranged at the tip end of the cylinder portion (104a) on the breaker section side. A pressing metal fitting (103) for locking the insulating nozzle (101) at the end of the cylinder portion (104a) of the puffer cylinder on the breaker section side is arranged in the hollow portion of the main movable contact (102).

Inventors:

KANEKO YUJI (JP)
YAGINUMA NORIYUKI (JP)
NOMURA DAISUKE (JP)
HIROSE MAKOTO (JP)

Application Number:

PCT/JP2014/052388

Publication Date:

September 12, 2014

Filing Date:

February 03, 2014

Export Citation:

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Assignee:

HITACHI LTD (JP)

International Classes:

H01H33/70; H01H33/91

Foreign References:

JPH0463523U	1992-05-29
JP2000509544A	2000-07-25
JPH08111151A	1996-04-30
JPH0997543A	1997-04-08
JP2008529223A	2008-07-31