Vacuum circuit breaker with weldable copper switch contacts
AssigneeSiemens Energy Global GmbH & Co. KG
InventorThomas Chyla
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Abstract
A method for producing an electrical switch contact arrangement for a vacuum circuit breaker includes the following steps: a) providing two electrical contact pieces made of copper or a copper alloy; b) coating the electrical contact pieces with aluminum or an aluminum alloy, the coating of the contact pieces taking place by means of a cold gas spraying method; c) welding each of the sides coated in method step b) to a current transfer contact; and d) arranging the units obtained in method step b) inside the vacuum circuit breaker. There is also described an electrical switch contact arrangement for a vacuum circuit breaker with the contact pieces produced by the method according to the invention.
Claims10
A method of producing an electrical switching contact arrangement for a vacuum circuit breaker having two electrical contact pieces, the method which comprises the following steps:
- a) providing two electrical contact pieces made of copper or a copper alloy, each of the contact pieces having a contact side;
- b) coating, by way of a cold gas spraying process, at least one side of each of the electrical contact pieces with aluminum or an aluminum alloy, and thereby coating at least a side of each of the contact pieces located opposite the contact side of a respective contact piece;
- c) welding sides of the contact pieces that are coated with aluminum or aluminum alloy in method step b) to a current transfer contact to form units each consisting of the contact piece and the current transfer contact;
- and
- d) arranging the units consisting of the contact piece and the current transfer contact inside the vacuum circuit breaker.
Dependencies are inferred from the claim text.