Siemens Aktiengesellschaft

Siemens Aktiengsellschaft

Stefan Lecheler

Radu-Marian Cernat

Karsten Freundt

Thomas Chyla

Martin Böttcher

Martin Boettcher

Werner Schmidt

Stefan Giere

Juergen Einschenk

Claudia Wiesinger

Jörg Teichmann

Martin Bindrich

Malte Georg Hirte

Mario Schaefer

Thomas Erlwein

Sarai Gonzalez

Prosper Hartig

Christian Heinrichs

Dorothea Pohlmann

Thomas Hintze

Rudolf Groth

Detlef Schwope

Mario Schäfer

Oliver Dohnke

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.

Fault detection in spring-loaded drives of medium-voltage switchgear systems

A system for short-circuiting or grounding low-voltage and/or medium-voltage installations. The system includes at least one fault detection unit for detecting an arc and at least one signal-processing unit for processing signals from the at least one fault detection unit. The signal-processing unit is or can be connected to the fault detection unit for signal transmission. The system further includes at least one control unit which is or can be connected to the signal-processing unit for signal transmission, an electrical energy storage device in or on the control unit, and at least one fast-switching switching element having a mechanical energy store.

Arc extinguishing systems

Disclosed is a device for recognizing an arcing fault in incident light that includes a sensor for detecting absorption lines of the incident light, and an evaluation unit which generates an evaluation signal when characteristic absorption lines are detected.

Device for recognizing an arcing fault, and electrical switchgear

A method and a device determine a movement profile of a solenoid plunger in a solenoid for monitoring a plunger-type armature movement for changes. The solenoid is an electromagnet in which a magnetic field can be generated by an electrical coil and a measuring unit is connected to the electrical coil. The method includes measuring a current profile with respect to time when the solenoid is operated, examining a measured current profile with respect to time for a position of a first reversal point in respect of time after operation of the solenoid and a current intensity, and assigning the position of the first reversal point to a movement end of the plunger-type armature.

Determining the movement profile of an armature in a magnet

A switch, in particular a grounding switch, is for quickly establishing a ground connection and for extinguishing an arc fault for a switching system. The grounding switch includes at least one fixed contact having a first cable feed, a moving contact, a contact guide having a second cable feed, and a mechanical energy store. In the opened state, an insulating distance between the fixed contact and the moving contact, is filled with insulation liquid, at least in part. The switch further includes a triggering device and a locking mechanism.

Quickly closing switch element

Growing community of inventors

Berlin, Germany

Stefan Lecheler