Arc-extinguishing system for a contact switching apparatus
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorKyoichi Yamamoto
Life of this patent
Estimating the term…
Abstract
An arc-extinguishing system for a contact switching apparatus having a plurality pieces of grid plate for arc extinction arranged outside the contact switching apparatus so as to be substantially vertical to a movable contact, and an arc box as well as an arc cover for covering the contact switching apparatus as well as arc-extinguishing grid plates, in which a thin-plate rib extending in a direction of an array of the arc-extinguishing grid plates is provided on the arc cover made of resin having elasticity, and the arc-extinguishing grid plates are fixed to the thin-plate rib by being pressed against end surfaces of the arc-extinguishing grid plates through connecting of the arc box to the arc cover.
Claims5
An arc-extinguishing system for a contact switching apparatus comprising:
- a plurality of arc-extinguishing grid plates, arranged outside a movable contact of the contact switching apparatus, vertical to said moveable contact, and
- an arc box and an arc cover, for covering said contact switching apparatus and said arc-extinguishing grid plates;
- wherein a gas blow-off opening section, formed by said arc box and said arc cover, is opened at an angle with respect to a top of the arc cover or sides of the arc box, to direct a flow of gas discharged from the gas blow-off opening section.
An arc-extinguishing system for a contact switching apparatus comprising:
- a plurality of arc-extinguishing grid plates, arranged outside a movable contact of the contact switching apparatus, vertical to said moveable contact, and
- an arc box and an arc cover, for covering said contact switching apparatus and said arc-extinguishing grid plates;
- wherein a void along an end surface of the arc-extinguishing grid plates is communicated and connected to a path substantially vertically formed by the arc cover and the arc box to form an L-shaped path, so that a gas blow-off opening section having the L-shaped path is opened to a side face of the arc box.
An arc-extinguishing system for a contact switching apparatus comprising:
- a plurality of arc-extinguishing grid plates, arranged outside a movable contact of the contact switching apparatus, vertical to said moveable contact, and
- an arc box and an arc cover, for covering said contact switching apparatus and said arc-extinguishing grid plates;
- wherein a gas blow-off opening section, formed by said arc box and said arc cover, is covered by a plurality of subdividing projections provided from said arc cover.
Dependencies are inferred from the claim text.