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OIL-DEGRADATION DETECTING APPARATUS

  • US 20090315574A1
  • Filed: 06/18/2008
  • Published: 12/24/2009
  • Est. Priority Date: 06/19/2007
  • Status: Active Grant
First Claim
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1. An oil-degradation detecting apparatus comprising:

  • two plates disposed so as to be parallel to each other in a path in which oil flows;

    an ammeter measuring the current that flows when an AC voltage is applied between the two plates;

    a voltmeter measuring the voltage between the plates when the AC voltage is applied to the two plates; and

    a processor determining the electrical conductivity and the dielectric constant of the oil based on measurement results from the ammeter and the voltmeter and judging degradation of the oil based on the electrical conductivity and the dielectric constant.

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