Title:
ESTER OIL-FILLED ELECTRIC APPARATUS, ESTER OIL-FILLED TRANSFORMER, AND METHOD FOR ANALYZING ALDEHYDE COMPOUND CONTAINED IN ESTER OIL
Document Type and Number:
WIPO Patent Application WO/2018/070091
Kind Code:
A1
Abstract:
The present invention facilitates preventive maintenance by efficiently and simply quantifying online a low-molecular-weight and low-boiling-point aldehyde compound generated by heat deterioration of an ester oil which is used as an insulating/cooling medium for an ester oil-filled electric apparatus. The ester oil-filled electric apparatus according to the present invention is configured to include: a tank having an electric device housed therein; an ester oil which serves as an insulating/cooling medium for insulating and cooling the electric device housed in the tank; a collecting pipe which collects the ester oil in the tank; a gas component collecting container that heats the ester oil collected by the collecting pipe so as to vaporize and gasify any low-molecular-weight and low-boiling-point aldehyde compound dissolved in the ester oil; and a gas analyzing device that analyzes the gas of the aldehyde compound collected by the gas component collecting container.
Inventors:
MOROOKA HISASHI (JP)
YAMAGISHI AKIRA (JP)
YAMAGISHI AKIRA (JP)
Application Number:
PCT/JP2017/027610
Publication Date:
April 19, 2018
Filing Date:
July 31, 2017
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G01N33/28; H01F27/00; H01F27/14
Foreign References:
| JP2002005840A | 2002-01-09 | |||
| JPS5311100U | 1978-01-30 | |||
| JPH0387006A | 1991-04-11 | |||
| JP2008182161A | 2008-08-07 | |||
| US20130024131A1 | 2013-01-24 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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