Patents by Inventor Astrid Renz
Astrid Renz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9607781Abstract: A tap changer for uninterrupted switching between winding taps of a tapped transformer has first and second load branches for each phase to be switched. Each load branch has a main vacuum switch and in parallel thereto a series connection of a switch-over resistance and a respective auxiliary vacuum switch. First and second vacuum switching tubes each contain the main vacuum switch of the respective first and second load branches and the auxiliary vacuum switch of the other of the load branches.Type: GrantFiled: November 10, 2011Date of Patent: March 28, 2017Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Wolfgang Albrecht, Christian Hammer, Werner Hartmann, Silvio Kosse, Andreas Lawall, Roman Renz, Astrid Renz, Andreas Stelzer, Joerg Teichmann, Norbert Wenzel
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Patent number: 9293273Abstract: The invention relates to a tap changer having vacuum interrupters for switching over between winding taps of a tapped transformer without interruption. The tap changer according to the invention having vacuum interrupters is based on the general idea of combining the functionalities of at least one conventional vacuum switching contact which switches under load and a further mechanical switching means according to the prior art in just one single vacuum interrupter with two separately moving contact systems.Type: GrantFiled: January 4, 2012Date of Patent: March 22, 2016Assignees: MASCHINENFABRIK REINHAUSEN GMBH, SIEMENS AGInventors: Wolfgang Albrecht, Christian Hammer, Christoph Heynen, Rainer Frotscher, Christian Kotz, Andreas Sachsenhauser, Christian Pircher, Werner Hartmann, Sylvio Kosse, Andreas Lawall, Astrid Renz, Roman Renz, Andreas Stelzer, Joerg Teichmann, Norbert Wenzel
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Patent number: 9123490Abstract: A vacuum switch tube has a housing which has two insulating housing regions arranged and configured symmetrically in respect of a center plane. Each of the two insulating housings contains a plurality of insulating housing parts. Shielding elements extend into the interior of the vacuum switch tube and are arranged between neighboring insulating housing parts and between insulating housing parts and neighboring additional housing parts. The shielding elements have improved dielectric properties and a simultaneously material-saving structure. Accordingly, the geometrical dimensions of the shielding elements are determined in dependence on a connected voltage and possible critical field strength between neighboring shields.Type: GrantFiled: January 7, 2011Date of Patent: September 1, 2015Assignee: Siemens AktiengesellschaftInventors: Lydia Baron, Werner Hartmann, Astrid Renz, Ulf Schümann
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Patent number: 8947188Abstract: The invention relates to a tap changer for the interruption-free switchover between winding taps of a tap-changing transformer. Furthermore, the present invention relates to a novel vacuum interrupter which is particularly suitable for such a tap changer. The tap changer according to the invention is based on the general concept of combining in each case one main contact (V1) and one mechanical switching means (U1), connected in series therewith, of a first load branch and an additional resistive contact (V3) of a second load branch in only a single vacuum interrupter (1) with a common housing (5).Type: GrantFiled: March 2, 2012Date of Patent: February 3, 2015Assignee: Maschinenfabrik Reinhausen GmbHInventors: Christian Hammer, Wolfgang Albrecht, Christian Pircher, Sebastian Rehkopf, Andreas Sachsenhauser, Konrad Raedlinger, Andreas Stelzer, Joerg Teichmann, Andreas Lawall, Sylvio Kosse, Werner Hartmann, Norbert Wenzel, Astrid Renz
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Patent number: 8847097Abstract: A vacuum interrupter includes a housing having two insulating material areas disposed and constructed symmetrically with respect to a center plane. Each of the two insulating material housing areas includes a plurality of insulating material housing parts. The interrupter has a compact construction and high dielectric strength. The insulating material housing part of each insulating material housing area located farthest away from the center plane has a length that is greater than the length of the other insulating material housing parts.Type: GrantFiled: June 18, 2010Date of Patent: September 30, 2014Assignee: Siemens AktiengesellschaftInventors: Ulf Schümann, Astrid Renz
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Publication number: 20140085028Abstract: The invention relates to a tap changer for the interruption-free switchover between winding taps of a tap-changing transformer. Furthermore, the present invention relates to a novel vacuum interrupter which is particularly suitable for such a tap changer. The tap changer according to the invention is based on the general concept of combining in each case one main contact (V1) and one mechanical switching means (U1), connected in series therewith, of a first load branch and an additional resistive contact (V3) of a second load branch in only a single vacuum interrupter (1) with a common housing (5).Type: ApplicationFiled: March 2, 2012Publication date: March 27, 2014Inventors: Christian Hammer, Wolfgang Albrecht, Christian Pircher, Sebastian Rehkopf, Andreas Sachsenhauser, Konrad Raedlinger, Andreas Stelzer, Joerg Teichmann, Andreas Lawall, Astrid Renz, Sylvio Kosse, Werner Hartmann, Norbert Wenzel
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Publication number: 20140034463Abstract: The invention relates to a tap changer for switching over between winding taps of a tap transformer without interruption, wherein two load branches are provided for each phase which is to be switched and each load branch has a vacuum switching contact, which acts as a main contact and, parallel to said vacuum switching contact, at least one series circuit comprising a transition resistor and in each case a further vacuum switching contact. In this case, in each case one vacuum switching contact of each load branch is structurally combined to form a single vacuum interrupter having two separate, fixed contacts (5, 8), which can be selectively connected, and a single moving contact (4).Type: ApplicationFiled: November 10, 2011Publication date: February 6, 2014Inventor: Astrid Renz
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Publication number: 20140027257Abstract: The invention relates to a tap changer having vacuum interrupters for switching over between winding taps of a tapped transformer without interruption. The tap changer according to the invention having vacuum interrupters is based on the general idea of combining the functionalities of at least one conventional vacuum switching contact which switches under load and a further mechanical switching means according to the prior art in just one single vacuum interrupter with two separately moving contact systems.Type: ApplicationFiled: January 4, 2012Publication date: January 30, 2014Inventor: Astrid Renz
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Publication number: 20130092659Abstract: A vacuum switch tube has a housing which has two insulating housing regions arranged and configured symmetrically in respect of a center plane. Each of the two insulating housings contains a plurality of insulating housing parts. Shielding elements extend into the interior of the vacuum switch tube and are arranged between neighboring insulating housing parts and between insulating housing parts and neighboring additional housing parts. The shielding elements have improved dielectric properties and a simultaneously material-saving structure. Accordingly, the geometrical dimensions of the shielding elements are determined in dependence on a connected voltage and possible critical field strength between neighboring shields.Type: ApplicationFiled: January 7, 2011Publication date: April 18, 2013Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Lydia Baron, Werner Hartmann, Ulf Schümann, Astrid Renz