AIR CIRCUIT BREAKER - MITSUBISHI ELECTRIC CORP

Title:

AIR CIRCUIT BREAKER

Document Type and Number:

WIPO Patent Application WO/2003/065396

Kind Code:

A1

Abstract:

An air circuit breaker capable of suppressing the temperature rise of a make and break contactor and energized bodies around the contact by a heat generation due to the energization of the contact, comprising, in a cabinet (1), a fixed conductor (3) having a fixed contact (4) fixed thereto, a movable element (6) having a movable contact (5) moving close to and apart from the fixed contact (4) fixed thereto, and an arc−extinguishing device (17) inductively extinguishing an arc generated between both contacts, a discharge window (1c) for discharging arc gas to the outside of the cabinet, vent holes (1d) opened at a position opposed to the discharge window (1c) and forming an air passage inside the cabinet, a valve member (21) closing the vent holes (1d) when a pressure inside the cabinet rises, an arc block (22) having a fixed side arc contactor (22a) extended from the fixed contact (4) to allow an electricity and a heat to be transferred thereto, and the movable side arc contactor (6) extended from the movable contact (5) to allow an electricity and a heat to be transferred thereto.

Inventors:

OKASHITA HIROSHI
KAWAKAMI JUNICHI

Application Number:

PCT/JP2002/000739

Publication Date:

August 07, 2003

Filing Date:

January 31, 2002

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

H01H9/34; H01H9/52; H01H33/53; H01H73/18; H01H1/22; H01H1/62; (IPC1-7): H01H33/53; H01H73/18

Foreign References:

JPH05303930A	1993-11-16
JPS5882441A	1983-05-18
JPS5882440A	1983-05-18
JPH11167921A	1999-06-22
JPH0831296A	1996-02-02

Other References: