Invention Grant
- Patent Title: Method for monitoring an on-load tap changer
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Application No.: US14379710Application Date: 2013-03-25
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Publication No.: US09835686B2Publication Date: 2017-12-05
- Inventor: Alfred Bieringer , Harald Hochmuth , Dominik Plitzko , Sebastian Schmid
- Applicant: Alfred Bieringer , Harald Hochmuth , Dominik Plitzko , Sebastian Schmid
- Applicant Address: DE Regensburg
- Assignee: MASCHINENFABRIK REINHAUSEN GMBH
- Current Assignee: MASCHINENFABRIK REINHAUSEN GMBH
- Current Assignee Address: DE Regensburg
- Agent Andrew Wilford
- Priority: DE102012103736 20120427
- International Application: PCT/EP2013/056250 WO 20130325
- International Announcement: WO2013/160046 WO 20131031
- Main IPC: G01R31/02
- IPC: G01R31/02 ; G01R31/327 ; H01H9/00

Abstract:
The invention relates to a method for monitoring an on-load tap changer that is used to switch between winding taps of a tapped transformer without interrupting the load current and is actuated using a motor drive. According to the invention, prior to the actual load switching process, the on-load tap changer is initially moved a short distance, preferably against the direction in which the load is subsequently switched. In said initial process, it is verified whether the on-load tap changer has moved, i.e. has left its previous stationary position, and/or whether the torque on the motor drive has exceeded a predefined threshold value. The actual load switching process takes place only once the test has yielded a positive result.
Public/Granted literature
- US20150035538A1 METHOD FOR MONITORING AN ON-LOAD TAP CHANGER Public/Granted day:2015-02-05
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