EP 0039096 A3 19820428 - PUFFER TYPE GAS-BLAST CIRCUIT INTERRUPTER
Title (en)
PUFFER TYPE GAS-BLAST CIRCUIT INTERRUPTER
Publication
Application
Priority
DE 3015946 A 19800425
Abstract (en)
[origin: US4438308A] A puffer piston circuit breaker has a stationary contact and a movable contact, of which at least the movable contact is tubular in shape. A piston-cylinder puffer assembly is fixedly connected with the movable contact for providing a flow of gas to extinguish the arc when the cylinder and the piston are displaced with respect to each other. In order to reduce the driving force required to actuate the moving parts to effect a flow of gas, a supplemental piston-cylinder assembly is also provided, the compression space of which is compressed by a helical spring device actuated by the current during a switching operation, such that additional quenching gas is supplied to the extinguishing flow. At least part of the current is commutated onto the spring during a switching action. The helical spring is securely clamped on one end and on the other end is fixedly connected with a movable piston of the supplemental piston-cylinder assembly. When current is flowing through the helical spring, the windings contract so that the movable piston is urged against a stationary piston member at one end of the supplemental piston-cylinder assembly.
IPC 1-7
IPC 8 full level
H01H 33/88 (2006.01); H01H 33/915 (2006.01)
CPC (source: EP US)
H01H 33/882 (2013.01 - EP US)
Citation (search report)
- DE 1151586 C
- DE 1226682 B 19661013 - SIEMENS AG
- DE 2526493 A1 19761223 - LICENTIA GMBH
- DD 77527 A
Designated contracting state (EPC)
CH DE FR LI NL
DOCDB simple family (publication)
EP 0039096 A2 19811104; EP 0039096 A3 19820428; EP 0039096 B1 19851113; DE 3015946 A1 19811029; DE 3172868 D1 19851219; US 4438308 A 19840320
DOCDB simple family (application)
EP 81200351 A 19810330; DE 3015946 A 19800425; DE 3172868 T 19810330; US 25770981 A 19810427