Fault detection in spring-loaded drives of medium-voltage switchgear systems
AssigneeSiemens Aktiengesellschaft
InventorsStefan Lecheler, Malte Georg Hirte
Life of this patent
Estimating the term…
Abstract
A method of operating a spring-loaded drive of a medium-voltage switchgear system includes at least the following steps: measuring a drive current of an electric auxiliary drive for loading a drive spring of the spring-loaded drive of the medium-voltage switchgear system; loading the drive spring by the electric auxiliary drive; creating an evaluation data set in accordance with the measured drive current; comparing the evaluation data set with an expectation; and outputting a maintenance signal in accordance with a result of the comparison. There is also described a spring-loaded drive and a medium-voltage switchgear system having a spring-loaded drive of this type.
Claims13
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.
A spring loaded drive for a medium-voltage switchgear installation, comprising:
- a drive spring;
- an electric auxiliary drive configured to tension said drive spring;
- a measuring unit configured to measure a drive current of said auxiliary drive and to communicate a measurement result to a control unit configured to operate the spring loaded drive by:
- tensioning a drive spring of the spring loaded drive by the electric auxiliary drive and measuring the drive current of said electric auxiliary drive;
- creating an evaluation data set depending on the measured drive current;
- comparing the evaluation data set with expected data;
- and
- when the evaluation data set deviates from the expected data by more than a given tolerance, outputting a maintenance signal.
A medium-voltage switchgear installation, comprising:
- a switch with a movable contact;
- a spring loaded drive having a drive spring and an electric auxiliary drive for tensioning said drive spring;
- and
- a measuring unit for measuring a drive current of said auxiliary drive and for communicating a measurement result to a control unit;
- and
- wherein said control unit is configured to operate the spring loaded drive by:
- tensioning a drive spring of the spring loaded drive by the electric auxiliary drive;
- measuring a drive current of said 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 and, when the evaluation data set deviates from the expected data by more than a given tolerance, outputting a maintenance signal;
- and
- outputting a control signal to move said movable contact of said switch.
Dependencies are inferred from the claim text.