Rigid dry high-voltage cable terminal end

Abstract

A high voltage cable terminal head of hard dry type is prepared as packing silicon gel insulation material between silicon rubber composite epoxy sleeve and stress controlling body for forming a polymer insulation layer, sealing both top and bottom ends of silicon rubber composite epoxy sleeve and stress controlling body separately by seal cap and tail pipe seal.

Description

technical field [0001] The invention belongs to the field of high-voltage electrical appliances, and in particular relates to a rigid dry-type high-voltage cable terminal head. Background technique [0002] With the development of my country's electric power construction, the demand for power continues to rise, and the demand for high-voltage power cables is increasing. High-voltage cable accessories are widely used, and high-voltage cable accessories have been localized and serialized. At present, the terminal heads of XLPE high-voltage cables with a voltage level of 66kV and above at home and abroad are oil-filled porcelain sheathed cable heads. [0003] The characteristic of traditional outdoor terminals is that the inner and outer insulation are treated separately. The outer insulation is a porcelain bushing, the inner insulation uses a prefabricated stress cone to control the electric field, and the bushing is filled with insulating oil such as silicone oil or polyisobu...

AI Technical Summary

Problems solved by technology

Porcelain casing terminals need to pour insulating oil into the casing at the construction site. After filling, the high-voltage outlet seals and shielding caps must be tightened. On the one hand, the liquid currently used needs to be sealed in the insulation to prevent oil Or gas leakage leads to electrical breakdown during operation. Because of this precedent, some flammable liquids may release toxic gases when arcing inside

The installation of this kind of terminal is complicated, the construction time is long, the product quality is affected by many factors during the installation process, and when the insulating medium in the bushing leaks, it is prone to accidents and causes pollution to the environment

In addition, the porcelain bushing is bulky and inconvenient to transport, and a platform is required for terminal installation, and the porcelain bushing is brittle and easily damaged

On the other hand, porcelain insulating jackets are fragile and bulky, and can be dangerously explosive in the event of internal flashover or external breakdown causing damage

Moreover, in areas with earthquake hazards, special protective measures are required, and it is easy to injure people and damage equipment in the event of a terminal accident

With the deterioration of the environment, pollution flashover accidents often occur, and the problem of pollution flashover cannot be solved simply by increasing the creepage distance, and the cable terminal is bulky and heavy

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