High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Contact structure
Patent
1999-04-13
2000-08-08
Scott, J. R.
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Contact structure
218 18, 218 49, 218 65, 218 74, H01H 3312, H01H 3366, H01H 33985
Patent
active
061004928
ABSTRACT:
A wreath of contact fingers (4) directed radially toward a switching axis (1) presses in the closed position against the circumferential surface of a contact pin (2) with consumable heads (5) fitted on the ends. At an angle of approximately 90.degree., the contact fingers (4) adjoin webs (6) which are guided in the closing direction up to a housing part (7) at which they are permanently anchored and via which they connect the contact fingers (4) to an electric terminal. The webs (6) and--with the exception of the consumable heads (5)--the contact fingers (4) are produced in one piece from springy material of high conductivity. The contact with the contact pin (2) radially deflects the consumable heads (5) in the closing direction with elastic bending of the webs (6). The length (R) of the radial contact fingers and the length (L) of the axial webs (6) are selected such that the attraction of the parallel component currents through the latter approximately compensates the contact repulsion forces.
REFERENCES:
patent: 4152560 (1979-05-01), McCloud et al.
patent: 4371765 (1983-02-01), Ragaller
patent: 4486632 (1984-12-01), Niemeyer et al.
patent: 5495084 (1996-02-01), Meyer et al.
patent: 5902978 (1999-05-01), Zehnder et al.
patent: 5929409 (1999-07-01), Zehnder et al.
patent: 5981893 (1999-11-01), Bleiker et al.
Anderes Robert
Dahler Christian
Kaltenegger Kurt
Schoenemann Thomas
Zehnder Lukas
Asea Brown Boveri AG
Scott J. R.
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