US 12,437,943 B2
Short-circuit current limiter
Hans-Peter Krämer, Erlangen (DE); Christian Schacherer, Deining (DE); and Erik D Taylor, Berlin (DE)
Assigned to Siemens Aktiengesellschaft, Munich (DE)
Appl. No. 18/004,482
Filed by Siemens Aktiengesellschaft, Munich (DE)
PCT Filed May 5, 2021, PCT No. PCT/EP2021/061861
§ 371(c)(1), (2) Date Jan. 6, 2023,
PCT Pub. No. WO2022/008118, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. 10 2020 208 426.2 (DE), filed on Jul. 6, 2020.
Prior Publication US 2023/0282431 A1, Sep. 7, 2023
Int. Cl. H01H 33/664 (2006.01)
CPC H01H 33/664 (2013.01) 7 Claims
OG exemplary drawing
 
1. A short-circuit current limiter, comprising:
a vacuum switch with switching contacts connected in a main current path;
a current-limiting unit connected in parallel with said vacuum switch in a commutation current path;
said switching contacts having contact pieces formed with a material selected such that a mean value of a chopping current is at least 8 amperes.