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Title:
SLIT ARC-EXTINGUISHING TYPE AIR-BREAK SWITCH
Document Type and Number:
Japanese Patent JP2015185218
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To improve arc-extinguishing performance of a slit arc-extinguishing type air-break switch.SOLUTION: A slit arc-extinguishing type air-break switch includes: a fixed electrode 21; a movable electrode 22 whose tip end is provided with a movable contact part 22a; an arc-extinguishing chamber 20 whose inner part is provided with a slit arranged along a moving passage of the movable contact part 22a; and an arc-extinguishing iron piece 23 attached to the arc-extinguishing chamber. Shapes of the fixed electrode 21 and the arc-extinguishing iron piece 23 are set such that the minimum distance between an arc fixed point A1 set at the end part of the fixed electrode 21 and the arc-extinguishing iron piece 23 becomes shorter than the minimum distances between other parts of the fixed electrode and the arc-extinguishing iron piece. Further, in a process of the movable contact part 22a emerging from the inside of the arc-extinguishing iron piece and moving toward a circuit opening side, shapes of the movable contact part 22a and the arc-extinguishing iron piece 23 are set such that a state is maintained where the minimum distance between an arc fixed point A2 set at the end part of the movable contact part 22a and the arc-extinguishing iron piece 23 is shorter than the minimum distances between other parts of the movable contact part and the arc-extinguishing iron piece.

Inventors:
SHIGA DAISUKE
AYABE KOICHI
GOTO YUYA
Application Number:
JP2014057810A
Publication Date:
October 22, 2015
Filing Date:
March 20, 2014
Export Citation:
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Assignee:
DAIHEN CORP
International Classes:
H01H33/08; H01H31/30
Domestic Patent References:
JPS60172249U1985-11-14
JP2012079453A2012-04-19
JP2011065925A2011-03-31
JPS60172249U1985-11-14
JP2012079453A2012-04-19
JP2011065925A2011-03-31
JP2010055970A2010-03-11
JP2010055970A2010-03-11
Attorney, Agent or Firm:
Shinichi Kikuchi
Toru Kikuchi
Hidetoshi Matsumoto