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External current transformer and GIS

A current transformer, external technology, applied in the direction of inductor, transformer/inductor casing, transformer/reactor installation/support/suspension, etc., can solve the problem of large size, large size of current transformer, inner diameter of transformer coil Large and other problems, to achieve the effect of convenient installation and operation

Pending Publication Date: 2021-11-09
PINGGAO GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an external current transformer to solve the problem in the prior art that the inner diameter of the transformer coil is relatively large due to the connection between the valgus edge of the top of the support cylinder and the upper isolating switch electrical housing through the adapter flange problem; at the same time, the present invention also provides a GIS using the above-mentioned external current transformer to solve the technical problem in the prior art that the size of the GIS is relatively large due to the large size of the current transformer

Method used

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  • External current transformer and GIS
  • External current transformer and GIS
  • External current transformer and GIS

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] In this embodiment, compared with the prior art, the external current transformer in the GIS adopts the axial sealing method, cancels the valgus edge set on the top of the support cylinder, and reduces the size of the transformer shell so that it can be placed on the support The size of the transformer coil outside the cylinder is reduced accordingly, thereby reducing the overall size of the GIS, making the GIS compact and miniaturized, thereby reducing the layout space of the GIS.

[0072] Such as Figure 1 to Figure 6 As shown, the GIS in this embodiment includes an upper switching device, an external current transformer and a lower switching device arranged in sequence, and the switching devices on both sides respectively have electrical housings, wherein the upper switching device is specifically a disconnector, The lower switching device is a circuit breaker, the electrical housing of the isolating switch is the isolating switch housing 10, the electrical housing o...

specific Embodiment 2

[0090] The main difference between it and Embodiment 1 is that in Embodiment 1, the transformer coils are arranged vertically and are directly set on the outer peripheral surface of the support cylinder, and the support screw supports and connects the top butt joint flange and the bottom support plate, and the bottom support plate is connected to the outer protective plate. The cover is hermetically fitted by a peripheral sealing ring. In this example, if Figure 7 As shown, the middle part of the support screw 4 is provided with a crimping rod 14 extending radially, and the end of the crimping rod 14 facing away from the support tube 22 is a nut sleeve, and the upper and lower sides of the nut sleeve are provided with fastening nuts and nut sleeves for fastening the top pressure. Contact and limit the crimping rod 14; the side pointing to the support cylinder 22 is a radial cylindrical rod. When the GIS is arranged horizontally, the transformer is arranged horizontally, and ...

specific Embodiment 3

[0093] The main difference between it and Embodiment 1 is that in Embodiment 1, the center hole of the flange of the top butt flange is sealed and inserted into the support cylinder through the peripheral sealing ring. In this embodiment, an end face sealing ring may be provided on the inner end face of the limit rim of the central hole of the flange, and the top surface of the support cylinder is press-fitted with the end face sealing ring to realize the sealing fit of the end face.

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Abstract

The invention relates to an external current transformer and a GIS. The external current transformer comprises a transformer shell, a supporting cylinder, a mutual inductor coil and atop butt flange, wherein a bottom supporting plate of the transformer shell is fixedly assembled with an electric appliance shell of a switching electric appliance on the lower side of the GIS; the supporting cylinder is used for being coaxially arranged outside a central conducting rod of the GIS in a sleeving mode, and the inner circumferential surface and the outer circumferential surface of the supporting cylinder are cylindrical surfaces; the mutual inductor coil is arranged outside the supporting cylinder in a sleeving mode in the direction facing the bottom supporting plate; the top butt flange is used for being fixedly assembled with an electric appliance shell of an upper switching electric appliance of the GIS in a sealed mode; and the top butt joint flange is provided with a flange center hole, and the top of the supporting cylinder is inserted into the flange center hole in a sealed mode. During assembly, the inner circumferential surface and the outer circumferential surface of the supporting cylinder are cylindrical surfaces, so that the internal space of the supporting cylinder and the central conducting rod is reduced, the size of the supporting cylinder is reduced, the inner diameter size of a mutual inductor coil sleeving the supporting cylinder is reduced, and the overall size of the GIS is further reduced.

Description

technical field [0001] The invention relates to an external current transformer and GIS. Background technique [0002] Current transformers for GIS are divided into external type and built-in type. The external type means that the current transformer coil is placed outside the sulfur hexafluoride insulating gas of the GIS equipment; while the built-in type is placed inside the sulfur hexafluoride insulating gas. [0003] Due to factors such as poor control of built-in current transformer micro water, external current transformer has become a development trend. [0004] The Chinese invention patent application with the current application publication number CN111192740A discloses an external current transformer, which includes: a support cylinder for the corresponding central conductive rod in the GIS to pass through, and a transformer coil is sleeved on the outside of the support cylinder; There is a connecting cylinder section on the top of the cylinder, and the connecting...

Claims

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Application Information

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IPC IPC(8): H01F38/30H01F27/02H01F27/06
CPCH01F38/30H01F27/02H01F27/06
Inventor 占小猛柴影辉段晓辉魏建巍齐小虎董祥渊谢世超高远刘龙冷龙茂温铭丽贺永明李俊峰徐锦举
Owner PINGGAO GRP
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