Current mutual inductor for GIS

A current transformer and inner shielding technology, which is applied in the direction of inductors, circuits, transformers, etc., can solve the problems of increasing operational safety uncertainties, cleanliness and moisture effects, and achieve improved operational safety, reduced impact, and production requirements Reduced effect

Inactive Publication Date: 2009-03-18
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually all parts of the current transformer are assembled in the GIS SF6 gas chamber, the cleanliness and moisture of the parts affect the performance of SF6 gas, which increases the uncertainties of operation safety

Method used

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  • Current mutual inductor for GIS

Examples

Experimental program
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Effect test

Embodiment Construction

[0012] refer to figure 1 , the upper end of the inner shielding cylinder 2 has an annular convex edge, the lower end has an annular tray, the coil 6 is set on the inner shielding cylinder 2, and is carried by the lower end of the annular tray, and an insulating resin 5 is poured between the coil 6 and the outer wall of the inner shielding cylinder 1, and combined into one. In this embodiment, after all the coils 6 are packaged, they are integrally cast with the outer wall of the inner shielding cylinder 2 .

[0013] After the coil 6 and the inner shielding tube 1 are assembled, the half-ring fastener 3 with an L-shaped cross-section arranged under the convex edge of the inner shielding tube 2 is used to connect with the upper flange 1 with bolts, and the upper surface of the inner shielding tube 2 is convex along the upper surface An annular gasket is arranged between the upper flange 1 and the upper flange 1. The shell 4 is welded between the outer edge of the upper flange ...

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Abstract

The invention discloses a current transformer for a GIS, belonging to the field of high voltage apparatuses, which comprises an internal shield cylinder and a coil which is sleeved on the internal shield cylinder, and is characterized by further comprising an upper flange, wherein the upper flange is hermetically connected with the upper end of the shield cylinder, and the upper end of the shield cylinder is provided with ring-shaped convex edges, a semi-circular fastening element in an L-shape cross section is arranged on the lower portion of the convex edges, and the semi-circular fastening element is connected with the upper flange, a ring-shape tray is arranged on the lower end of the internal shield cylinder, and is used to bear the coil, and insulating resin is poured between the coil and the outer walls of the internal shield cylinder.

Description

technical field [0001] The invention relates to the field of high-voltage electrical appliances, in particular to a current transformer for GIS. Background technique [0002] GIS (insulated metal-enclosed switchgear) is a high-voltage electrical appliance insulated by SF6 gas. Pure SF6 gas has the best arc extinguishing and insulation performance, and its performance is stable, but its insulation performance is often affected by conductive particles and water content. Insulation performance and arc extinguishing performance are reduced. The conductive particles move under the action of the electric field, and they are arranged in the electric field to reduce the breakdown voltage; moisture can form condensation on the surface of the insulating part, which is detrimental to the insulation performance, and can affect the stability of the SF6 gas. When it is more, SF6 gas may be hydrolyzed above 200°C to produce hydrofluoric acid, which is very corrosive, and the hydrolysis pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/30H01F27/36
Inventor 杨雯赵华锋吴薇窦嘉政
Owner CHINA XD ELECTRIC CO LTD
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