Power breaker
AssigneeABB Research Ltd.
InventorsLukas Zehnder, Kurt Kaltenegger, Lorenz Muller, Lutz Niemeyer
Life of this patent
Estimating the term…
Abstract
The power breaker is provided with a contact arrangement which is equipped with erosion-resistant contact members and has a stationary contact member (4), a contact member (4) which can move along a central axis (6) and an insulating nozzle (6) which concentrically surrounds the contact members (3, 4) and has a constriction (6). The insulating nozzle (6) is manufactured from an erosion-resistant plastic and is structured such that erosion channels which are formed run at right angles to the direction of the electrical field load. This insulating nozzle emits gases during disconnection, which particularly effectively support the production of blowing pressure in the arc zone.
Claims18
A power breaker having a contact arrangement which is equipped with erosion-resistant contact members and has a stationary contact member, a contact member which can move along a central axis, and an insulating nozzle which concentrically surrounds the contact members, has a constriction and is manufactured from an erosion-resistant plastic, wherein the insulating nozzle is structured such that erosion channels which are formed run at right angles to a direction of an electrical field load, and an aliphatic polymer or an aromatic polymer is provided as the erosion-resistant plastic, polytetrafluoroethylene (PTFE), fluoroethylenepropylene (FEP), perfluoroalkoxy (PFA), ethylenetetrafluoroethylene (ETFE) or a similar polymer or a mixture of at least two of these polymers is provided as the aliphatic polymer, the polytetrafluoroetheylene (PTFE) being prestressed by axial dilatation.
A power breaker having a contact arrangement which is equipped with erosion-resistant contact members and has a stationary contact member, a contact member which can move along a central axis, and an insulating nozzle which concentrically surrounds the contact members, has a constriction and is manufactured from an erosion-resistant plastic, wherein the insulating nozzle is structured such that erosion channels which are formed run at right angles to a direction of an electrical field load, and an aliphatic polymer or an aromatic polymer is provided as the erosion-resistant plastic, polytetrafluoroethylene (PTFE), fluoroethylenepropylene (FEP), perfluoroalkoxy (PFA), ethylenetetrafluoroethylene (ETFE) or a similar polymer or a mixture of at least two of these polymers is provided as the aliphatic polymer, a polymer containing hydrogen being added to the polytetrafluoroethylene (PTFE), the polymer comprising elongated particles aligned at right angles to the central axis, and polyoxymethylene (POM) flakes or polyamide (PA) fibers being provided as the particles.
A power breaker having a contact arrangement which is equipped with erosion-resistant contact members and has a stationary contact member, a contact member which can move along a central axis, and an insulating nozzle which concentrically surrounds the contact members, has a constriction and is manufactured from an erosion-resistant plastic, wherein the insulating nozzle is structured such that erosion channels which are formed run at right angles to a direction of an electrical field load, and an aliphatic polymer or an aromatic polymer is provided as the erosion-resistant plastic, polytetrafluoroethylene (PTFE), fluoroethylenepropylene (FEP), perfluoroalkoxy (PFA), ethylenetetrafluoroethylene (ETFE) or a similar polymer or a mixture of at least two of these polymers is provided as the aliphatic polymer, glass fibers aligned at right angles to the central axis being incorporated in the polytetrafluoroethylene (PTFE).
A power breaker having a contact arrangement which is equipped with erosion-resistant contact members and has a stationary contact member, a contact member which can move along a central axis, and an insulating nozzle which concentrically surrounds the contact members, has a constriction and is manufactured from an erosion-resistant plastic, wherein the insulating nozzle is structured such that erosion channels which are formed run at right angles to a direction of an electrical field load, and an aliphatic polymer or an aromatic polymer is provided as the erosion-resistant plastic, the insulating nozzle being composed of disks which are arranged at right angles to the central axis and are made of different polymers or of identical polymers that are doped differently.
Dependencies are inferred from the claim text.