Compress gas circuit breaker
AssigneeSiemens Aktiengesellschaft
InventorsWalter Hertz, Jan Stroh, Heinz Schwalme
Life of this patent
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Abstract
A compressed gas circuit breaker, especially a blasting piston ("puffer") circuit breaker having a movable nozzle of insulating material which surrounds the quenching gap and, by means of pressure springs, forms a stop for closing off the gas flow canal, in which a guide is provided coupling at least one pressure spring to the relative motion of the contacts in such a manner that its effect on the insulating material body is cancelled as soon as the minimum quenching distance has been reached during the opening of the breaker, preventing blasting of the arc before the switch contacts have reached their quenching distance.
Claims4
A compressed gas circuit breaker comprising:
- (a) first and second contacts disposed coaxially, and movable in their axial direction with respect to each other;
- (b) a nozzle-like insulator body supported for movement with respect to one of said contacts between a first position where it forms, with said one contact, a flow canal for directing compressed gas to the area of an arc which is drawn between said contacts and a second position where it abuts against said one contact to close off said flow canal;
- (c) means for holding said insulating body in said second position;
- and
- (d) means responsive to relative movement of said contacts for releasing said means for holding during separation of said contacts always as soon as the minimum quenching distance of said contacts is reached whereby said insulating body may move to said first position to open said flow canal to quench an arc drawn between said contacts.
Dependencies are inferred from the claim text.