Title:
GAS INSULATED SWITCHGEAR AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/152952
Kind Code:
A1
Abstract:
Provided is a gas insulated switchgear comprising a grounded tank, and a high-voltage conductor installed inside the tank and insulated from the tank, wherein: a resin layer having a configuration in which a plurality of types of non-linear resistance materials are mixed with resin is formed on the inner surface of the tank; and a first non-linear resistance material, which is at least one type of non-linear resistance material among the plurality of types of non-linear resistance materials, has a higher operating electric field and a higher slope of a non-linear characteristic curve in the range of an electric field higher than the operating electric field than a second non-linear resistance material, which is at least one other type of non-linear resistance material among the plurality of types of non-linear resistance materials. As a result, it is possible to reliably suppress the floating of the metallic foreign matter generated inside the gas insulated switchgear and adhering to the inner surface of the tank, and to maintain a high dielectric strength.
Inventors:
NUKAGA JUN (JP)
HOSONO TAKAFUMI (JP)
HOSONO TAKAFUMI (JP)
Application Number:
PCT/JP2019/044297
Publication Date:
July 30, 2020
Filing Date:
November 12, 2019
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H02B13/055; H02B13/035
Domestic Patent References:
| WO2015136753A1 | 2015-09-17 |
Foreign References:
| JP2018196280A | 2018-12-06 | |||
| JP2014156587A | 2014-08-28 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
Download PDF: