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Patent Searching and Data


Title:
ON-LOAD TAP CHANGER
Document Type and Number:
Japanese Patent JP2009218345
Kind Code:
A
Abstract:

To provide a vacuum switch type on-load tap changer which can prevent deterioration of an insulation oil.

The on-load tap changer 1 includes a tap selector 2 and a vacuum switch type changeover opening and closing device 3. An opening and closing device body 4 of the vacuum switch type changeover opening and closing device 3 is housed in the container 7 of changeover opening and closing device wherein an insulation oil 6 is stored, and a vacuum switch 5 is provided in the opening and closing device body 4. A conservator 8 is fitted to the container 7 thereof to replenish the insulation oil 6 to the container 7 thereof. A space isolated from air wherein the insulation oil 6 is stored in a closed state is formed in the conservator 8. A space volume 8c within a conservator 8 is filled with a gas including no oxygen such as an inert gas or the like, nitrogen, for example. The conservator 8 and the container 7 thereof are connected by an oil pipe 9.


Inventors:
MIHARA YUJI
Application Number:
JP2008059508A
Publication Date:
September 24, 2009
Filing Date:
March 10, 2008
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H01F29/04
Domestic Patent References:
JPS62116523U1987-07-24
JPS62116523U1987-07-24
JPH0414804A1992-01-20
JPS5726829U1982-02-12
JPH05250946A1993-09-28
Attorney, Agent or Firm:
Kuro Fukami
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Masayuki Sakai
Nobuo Arakawa