JP2013140767A5 - - Google Patents

Claims (9)

  At least one of a pair of contacts provided so that the contacts can be contacted and separated by the drive mechanism, an arc extinguishing grid for extinguishing an arc generated between the contacts when the contact is opened In the arc rolling, a plurality of irregularities are repeatedly arranged at predetermined intervals in a direction intersecting the traveling direction of the arc on at least a part of the surface. And a flow part.   The switch according to claim 1, wherein adjacent convex portions of the plurality of concave and convex portions are separated by a recess.   The concave portion for reducing the heat capacity of the convex portion is provided on the back surface portion of the convex portion of the concave and convex portions provided in the arc commutation portion. Switch.   The switch according to any one of claims 1 to 3, wherein a dielectric insulator is provided in a concave portion in the concave and convex portion provided in the arc commutation portion.   The switch according to any one of claims 1 to 4, wherein the arc commutation portion is made of a magnetic material.   6. The arc commutation portion disposed on the cathode side in a direct current circuit is made of a material having a work function lower than that of the material used for the contactor. The switch as described in. The arc commutation portion disposed on the anode side of the DC circuit, any one of claims 1 to 5, characterized in that it has a material higher work function than the material used for the contacts The switch as described in.   The switch according to any one of claims 1 to 7, wherein a material having a lower boiling point or a smaller specific heat than the material used for the contact is used as the arc commutation section.   The switch according to any one of claims 1 to 7, wherein a material having a higher boiling point or a higher specific heat than the material used for the contact is used as the arc commutation section.