US 4,163,131 A · Dual-compression gas-blast puffer-type interrupting device

Abstract

A fluid-blast circuit-interrupter of the puffer-type is provided having two connected piston structures, one designated herein as a primary piston structure, and the other termed a secondary piston structure, connected serially mechanically in tandem series arrangement to thereby compress a suitable arc-extinguishing fluid in two separate compression chambers. Valve action is utilized to delay the initiation of the second gas-blast from the second compression chamber toward the arc until the separable interrupting contacts have reached a desired predetermined contact separation distance. By suitably changing the component dimensions of the interrupter, the degree of gas compression, and the instant of gas-blast application of the second arc-extinguishing blast, may be changed without delaying the instant of initial contact separation.

Claims14

Dependent claims

A dual-piston-acting gas-blast puffer-type circuit-interrupter comprising, in combination:

(a) means defining primary and secondary compression chambers,
(b) means for supplying arc extinguishing fluid to said primary and secondary compression chambers;
(c) means defining primary and secondary movable pistons movable within said primary and secondary compression chambers;
(d) means for moving said pistons;
(e) movable nozzle means movable with said primary and secondary movable pistons defining an arcing chamber;
(f) a pair of separable arcing contacts separable to initiate an arc therebetween within said arcing chamber;
and,
(g) valve means operable by the movement of said movable primary and secondary pistons to initiate separate flows of arc-extinguishing fluid from said primary and said secondary compression chambers into said arcing chamber.

5 more elements

A puffer-type circuit-interrupter comprising, in combination,

(a) means defining a housing containing an arc-extinguishing fluid,
(b) means defining separate primary and secondary compression chambers disposed within said housing;
(c) a movable primary piston operable to compress arc-extinguishing fluid within said primary compression chamber;
(d) means defining a secondary compression chamber disposed within said housing;
(e) means defining a movable secondary piston operable to compress arc-extinguishing fluid within said secondary compression chamber;
(f) movable nozzle means defining an arcing chamber;
(g) means defining a relatively-fixed contact;
(h) means defining a movable contact structure comprising an arcing contact;
and
(i) means mechanically interconnecting said movable primary and secondary pistons, said movable contact structure being cooperable with said relatively-fixed contact structure to establish an arc therebetween and at the same time driving said two pistons to compress arc-extinguishing fluid within said primary and secondary compression chambers;
and,
(j) valve means actuated by said movable contact structure operable to initiate fluid flow from said primary and secondary compression chambers into said arcing chamber.

9 more elements

Dependencies are inferred from the claim text.

Dual-compression gas-blast puffer-type interrupting device

Life of this patent

Dual-compression gas-blast puffer-type interrupting device

Life of this patent

Abstract

Claims14