Composite insulator device with built-in piezo-resistance unit

Abstract

The invention discloses a composite insulator device with a built-in piezo-resistance unit. The composite insulator device comprises the piezo-resistance unit, an insulating pillar, enhanced blowout gap units and installation hardware; the piezo-resistance unit comprises a piezo-resistance subunit core, an insulating core rod and an insulating sheath; each enhanced blowout gap unit comprises a blowout cavity, an insulated support member and a gap electrode; and the enhanced blowout gap units are fixedly installed in the two ends of the insulating pillar or arranged uniformly along the axial direction of the insulating pillar. A lightning arrester is integrated with an insulator, the rated voltage of the piezo-resistance unit is reduced by using the high arc extinguishing capability of theenhanced blowout gap unit, and the device is mini, light and cheap; and the device is assembled while leaving the factory, onsite part adjustment and assembly are not needed, it is not required to strip an insulating layer of a lead when the device is connected with the insulating lead, and installation and construction are simple convenient.

Description

Technical field [0001] The invention relates to the technical field of lightning protection and grounding, in particular to a composite insulator device with a built-in varistor unit. Background technique [0002] Existing out-of-band series gap arresters use the structure of the arrester body in series with pure air gaps or with support gaps. Due to such open external series gaps, the power frequency continuous flow stability is inadequate and the current test conditions cannot support the development of long gap power frequency The limitation of continuous current interruption test research cannot make deep and refined use of the arc extinguishing ability of the external series gap, resulting in the high rated voltage of the current lightning arrester body with external series gap, large size and heavy weight, high overall cost, and on-site installation and construction High manpower and material resources; traditionally designed and produced out-of-band series gap arresters an...

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Problems solved by technology

[0002] The existing out-of-band series gap surge arrester adopts the structure of the arrester body in series with pure air gap or with a support gap. Due to this kind of open outside series gap, the power frequency continuous flow stability is inherently insufficient and the current test conditions cannot support the development of long gap power frequency. Due to the limitations of freewheeling interruption test research, it is impossible to use the arc-extinguishing ability of the external series gap deeply and finely. As a result, the rated voltage value of the arrester body with the external series gap is relatively high, the device is large in size and weight, and the overall cost is high. On-site installation and construction The consumption of manpower and material resources is large; in the traditional way, the out-of-band series gap arrester and the line insulator are designed and produced independently of each other, assembled and assembled on site, the production process consumes a lot, the on-site installation operation is complicated, and the space occupied by the arrester is reduced. to adversely affect

The above-mentioned deficiencies lead to the high overall cost of lightning protection when using out-of-band series gap arresters in current projects

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