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Device for electric field control

a technology for electric field control and devices, applied in the direction of electric cable installation, cable junctions, printed circuit details, etc., can solve the problems of considerable cost reduction, and achieve the effect of reducing power loss

Inactive Publication Date: 2013-06-20
ABB TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enables the device to handle significantly higher voltages without damage, reducing material costs and preventing stress at the triple point, while maintaining effective electric field control.

Problems solved by technology

This also means that for a given voltage level less material may be used for said resistive layer while still being able to take the voltage, which results in a considerable reduction of costs, since this field controlling material is expensive.

Method used

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  • Device for electric field control
  • Device for electric field control
  • Device for electric field control

Examples

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Embodiment Construction

[0023]A cable joint 1 is shown in cross-section in FIG. 1. This cable joint has an inner resistive layer 2 with electric field controlling properties adapted to be arranged along a cable 3 and to be at one end 4 connected to a live high voltage part of the cable and at it's other end 5 electrically connected to ground potential by being connected to the outer semi-conducting sheath of the cable.

[0024]An insulating layer 6 is arranged outside the resistive layer and extend towards said other end 5 while ending by a tapering field controlling geometry 7 without reaching and at a distance to this end 5.

[0025]A semi-conducting or conducting layer 8 is arranged outside the insulating layer and extend past the end of the insulating layer towards said other end 5 of the resistive layer, so that the resistive layer, the insulating layer and the semi-conducting or the conducting layer meet at a triple point 9 at said end 10 of the insulating layer. The material of the different layers 2, 6 a...

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Abstract

A device for controlling an electric field at a high voltage component including a resistive layer for field control, an insulating layer arranged on the resistive layer and a semi-conducting or conducting layer arranged on the insulating layer. The three layers meet at a triple point where the insulating layer ends. An interface between the resistive layer and the insulating layer makes in the triple point an angle to the semi-conducting or conducting layer of 60°-120°.

Description

TECHNICAL FIELD OF THE INVENTION AND PRIOR ART[0001]The present invention relates to a device for controlling an electric field at a high voltage component, said device comprising a resistive layer adapted, for field controlling purposes, to be arranged along a said component and which at one end is adapted to be electrically connected to a live high voltage part of the component and, at its other end, adapted to be electrically connected to ground potential, an insulating layer arranged on said resistive layer and extending outside thereof from said one end towards said other end while ending by a tapering field controlling geometry without reaching at a distance to said other end, as well as a semi-conducting or conducting layer arranged on the insulating layer and extending outside thereof past the end of the insulating layer towards said other end of the resistive layer, so that said resistive layer, said insulating layer and said semi-conducting or conducting layer meet at a tr...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H02G15/08H05K1/02
CPCH02G15/068H02G15/103H02G15/184H02G15/08Y10T29/49071Y10T29/49117Y10T29/49073Y10T29/49096H05K1/02
Inventor LICHY, RADIM
Owner ABB TECH AG