Voltage dividing capacitor
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United States of America Patent
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Jun 4, 2019
Grant Date -
Feb 14, 2019
app pub date -
Mar 13, 2017
filing date -
Mar 17, 2016
priority date (Note) -
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Abstract
A voltage dividing capacitor (1) arranged parallel to a vacuum interrupter (2) has a long narrow cylindrical-shaped capacitor series (16) that is configured by a plurality of capacitor elements (15) being connected with connecting screws. One end of the capacitor series (16) is supported by a fixed supporting unit (25), and the other end id supported by a movable supporting unit (26) so as to allow thermal expansion and contraction. A insulation tube (31) fixed to the movable supporting unit (26) has a short length, and only a first capacitor element (15A) is fitted into the insulation tube (31). Since a portion where high electric field appears is a middle of five capacitor elements (15) and electric field at an end portion of the capacitor series (16) is low, forming of triple junction at the portion of the high electric field is avoided.
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