US 12,334,283 B2
Fault detection in spring-loaded drives of medium-voltage switchgear systems
Stefan Lecheler, Berlin (DE); and Malte Georg Hirte, Petershagen (DE)
Assigned to Siemens Aktiengesellschaft, Munich (DE)
Appl. No. 18/006,192
Filed by Siemens Aktiengesellschaft, Munich (DE)
PCT Filed Jun. 9, 2021, PCT No. PCT/EP2021/065379
§ 371(c)(1), (2) Date Jan. 20, 2023,
PCT Pub. No. WO2022/017675, PCT Pub. Date Jan. 27, 2022.
Claims priority of application No. 10 2020 209 017.3 (DE), filed on Jul. 20, 2020.
Prior Publication US 2023/0335350 A1, Oct. 19, 2023
Int. Cl. H01H 3/30 (2006.01); G01R 31/327 (2006.01)
CPC H01H 3/3052 (2013.01) [G01R 31/3275 (2013.01); H01H 2300/052 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for operating a spring loaded drive of a medium-voltage switchgear installation, the method comprising the following steps:
tensioning a drive spring of the spring loaded drive of the medium-voltage switchgear installation by an electric auxiliary drive and measuring a drive current of the electric auxiliary drive for tensioning the drive spring;
creating an evaluation data set depending on the measured drive current;
comparing the evaluation data set with expected data to form a comparison result; and
when the evaluation data set deviates from the expected data by more than a given tolerance, outputting a maintenance signal.