VIBRATIONAL SENSOR DEVICE AND METHOD FOR DETECTING AN ENERGIZED TRANSFORMER
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United States of America Patent
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app pub date -
Jan 27, 2015
filing date -
Jan 27, 2015
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Abstract
A vibrational sensor device and method for detecting an energized transformer is disclosed. The device may sense when a liquid-filled transformer is excited either fully or partially. The device may sense when a liquid-filled transformer is operating with or without a load current on a secondary winding of the transformer. The device may annunciate a full excitation state, a partial excitation state, a no excitation state, an OK power supply state and a low battery state. The device may detect magneto restriction vibrations at twice a line frequency such as at 120 Hz for a 60 Hz transformer. The device may be installed on a new or a retro-fit liquid-filled transformer.
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