Fragmentation guard and method for manufacturing a shattering guard
A technology of protective device and high-voltage device, which is applied in the direction of overvoltage arrester using spark gap, overhead installation, cable installation, etc., can solve the problem of not being able to use modification or post-assembly, etc.
Active Publication Date: 2022-05-17
HITACHI ENERGY SWITZERLAND AG
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Problems solved by technology
[0007] The problem with this solution is that it is part of the original product design and manufacture and cannot be used for retrofit or post-assembly
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[0038] The following references to the accompanying drawings, will more fully describe the various aspects of the present disclosure. However, the devices and methods disclosed herein may be implemented in many different forms and should not be construed as limited to the aspects described herein. In all drawings, similar numbers refer to similar elements.
[0039] The terms used herein are used only for purposes describing specific aspects of the present disclosure, and are not intended to limit the present invention. Unless explicitly indicated in context, the singular forms "one", "one", and "the" used herein are also intended to include plural forms.
[0040] Unless there is a definition to the contrary, all terms used herein have the same meaning as those of ordinary skill in the art to which the present disclosure is commonly understood.
[0041] The term "winding" is used as a reference to a spiral winding to form a composite bundle of crushing guards, as described in the f...
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Abstract
The invention relates to a crush protection device (1) for a high voltage device (2) having a ceramic insulator (3). The crush protection device (1) comprises at least one electrically insulating tube (4, 41, 42) comprising a plurality of holes (5) passing through the envelope surface of the electrically insulating tube (4, 41, 42). The diameter of the electrically insulating tube (4, 41, 42) is such that there is a minimum distance. It also relates to a method for manufacturing a crush protection device (1) for a high voltage device (2) with a ceramic insulator (3), comprising: winding (S1) an electrically insulating fiber composite of a first helical shape with a first pitch material such that there is a first gap between the winding coils, the diameter of the first helical shape is such that when the first electrical insulating tube (4, 41) and the ceramic insulator (3) are concentrically arranged There is a minimum distance between them; and winding (S2) the electrically insulating fiber composite material of the second helical shape onto the first helical shape, the windings of the second helical shape and the windings of the first helical shape forming opposite directions and different from The second pitch of the first pitch is wound such that there is a second gap between the coils of the winding. Thus, a first electrical insulating tube (4, 41) of the at least one electrical insulating tube (4) is formed with a hole (51) formed by the first and second gap between the coils of the winding.
Description
Technical field [0001] The present invention relates to a crushing guard device for a high voltage device having a ceramic insulator. Background [0002] Although the use of composite insulators is increasing, there are still a very large number of porcelain insulators in use. Failures in high-voltage (HV) installations with porcelain insulators often lead to explosions, causing porcelain chips to fly out at high speeds in all directions; this can be dangerous for people and neighboring equipment. This type of explosive failure can be caused by an internal fault that causes sudden heating and expansion of the internal insulating medium (gas or liquid). Explosive failures can also be caused by vandalism. [0003] Current risk mitigation measures include: [0004] Prevent personnel from entering stations where live equipment is in a dangerous state. [0005] Replace equipment in hazardous condition with new, safer equipment (e.g., dry HV units) instead of oil-filled HV units or us...
Claims
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IPC IPC(8): H01B17/00H02G7/00H02G3/04
CPCH01B17/00H02G3/0412H02G7/00H01B17/42H01B17/56H01T4/04
Inventor S·霍特朗德M·亨里克森A·霍尔伯格A·约翰逊
Owner HITACHI ENERGY SWITZERLAND AG