Title:
SURGE PROTECTION ELEMENT
Document Type and Number:
Japanese Patent JP2020004577
Kind Code:
A
Abstract:
To provide a surge protection element, which can be manufactured at a low cost, capable of suppressing short circuit due to adhesion of metal components scattered by arc discharge.SOLUTION: The surge protection element includes: an insulating tube 2; a pair of sealing electrodes 3 for closing both end openings of the insulating tube and sealing a discharge control gas therein; and an interval adjusting member 4 for defining an interval between the pair of sealing electrodes, by being sandwiched between opposing surfaces of the pair of sealing electrodes in a state where a part is left open as a discharge space S between the pair of sealing electrodes. The interval adjusting member is composed of a plurality of thin plate members 4a and 4b, overlapped in an axial direction of the insulating tube, at least one of which is formed of an insulating material. In at least one of the plurality of thin plate members, a peripheral edge portion in contact with the discharge space has a different shape from other overlapping thin plate members. A step portion D is formed at a peripheral edge portion of the interval adjusting member that is in contact with the discharge space.SELECTED DRAWING: Figure 1
Inventors:
MAYUZUMI YOSHITAKA
SAKAI NOBUTOMO
SAKAI NOBUTOMO
Application Number:
JP2018121923A
Publication Date:
January 09, 2020
Filing Date:
June 27, 2018
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP
International Classes:
H01T4/12; H01T1/20; H01T2/02; H01T4/16
Domestic Patent References:
| JPS6472485A | 1989-03-17 | |||
| JP2017199490A | 2017-11-02 |
Attorney, Agent or Firm:
Hideyuki Sugiura