Voltage measuring device
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United States of America Patent
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Nov 7, 2017
Issued Date -
N/A
app pub date -
May 28, 2014
filing date -
May 31, 2013
priority date (Note) -
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Abstract
Methods and apparatus for measuring the voltage of at least one conductor (121, 122, 123) of an electrical power cable (10) comprise providing a container (22) made from a conductive material around a portion of the cable and at least one electric field sensor (301, 302, 303, 304) between the container and the cable and bringing the container to a constant potential and measuring the electric field with a sensor. The voltage is determined by comparing the measured electric field with electric fields simulated for a plurality of configurations of punctual electric charges.
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