Arrestor

A technology of lightning arrester and insulating sleeve, which is applied in the field of lightning arrester, can solve the problems of damage to lightning arrester components, difficulty in electric field concentration, etc., and achieve the effects of preventing dielectric breakdown, reducing weight, and reducing weight
CN101589526AInactive Publication Date: 2009-11-25SHOWA ELECTRIC WIRE & CABLE CO
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHOWA ELECTRIC WIRE & CABLE CO
Publication Date
2009-11-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

An arrestor in which surface pressure at the interface between the inner peripheral surface of a reception opening of a fixed bushing and the outer peripheral surface of the forward end of an insulation tube is maintained at an appropriate level. The arrestor has the insulation tube (1) having a conductor (2) at its forward end, a stacked body (4) of arrestor elements, inserted into the insulation tube (1) with a high-voltage electrode (3) in between, a ground electrode (5) placed at the rear end side of the arrestor element stacked body (4), a coiled spring (8) placed at the rear end side of the ground electrode (5) so as to be concentric with the insulation tube (1), a metal case (6) surrounding the insulation tube (1), the ground electrode (5), and the spring (8), and a sealing member (7) installed at the opening on the rear end side of the metal case (6). The outer diameter of the rear end side of the insulation tube (1) is set smaller than the outer diameter of the center portion of the insulation tube (1). Also, a tapered outer surface (13) is provided at the outer periphery of the forward end (11) of the insulation tube (1).
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Description

technical field

[0001] The invention relates to a lightning arrester. In particular, the present invention relates to a lightning arrester capable of attempting to miniaturize and reduce the weight of the insulating sleeve (which accommodates the stack of arrester elements), ensuring that the inner peripheral surface of the receiving opening of the fixed sleeve and the insulating sleeve interface pressure between the outer peripheral surfaces of the front end portion of the barrel, and prevent dielectric breakdown of the aforementioned interface. Background technique

[0002] Generally, in gas insulated switchgears installed in power plants or substations, etc., lightning arresters are arranged to protect electrical equipment such as switchgears or transformers from abnormal voltages that would intrude through cables when, for example, lightning occurs.

[0003] Therefore, as this surge arrester, such as Figure 11 As shown in , there is known a lightning arrester such that...

Claims

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