Two- or multiple-piece insulating body system for producing medium high voltage cable fittings

Abstract

A two- or three-part insulator system (1) is described for the production of medium and high voltage cable fittings with self-locking electrically insulating closures for e.g. securing cable connections, said system comprising at least a first insulator (2), which has a linear spherical-like locking element (3) set at the engagement surface (4) on its front face, which snap-fits with the second insulator (5) ) engages with a complementary receiver (6) at the engagement surface (4) on the front face of the ). Insulators (2, 5) form the electrical insulation of medium and high voltage cable fittings, each comprising an inner side (1.1) directed towards the cable connection and an outer side (1.2) directed towards the surrounding area, and at least one insulator (2 or 5) covers the active voltage transport connection elements, while the two insulators (2, 5) to be connected in cross-section form a closed linear spherical-like closing locking element (3) and a complementary receiving element (6) is set as the locking element The head area (7) of (3) and the opening area (7) of the receiving element (6) are in a pair of concavo-convex curved shapes, and each has a neck area (8) and a shoulder area (9) adjacent to the neck area, the The neck region may be bounded by the bending point of the inflection. Both insulators (2, 5) are provided on the inner side (1.1) and the outer side (1.2) with a conductive layer (10, 11) extending over at least one of the two insulators (2, 5) across the The engagement surfaces (4) on the front face, entering the head region or the opening region (7), respectively, at least up to the point of inflection of the inflection, are spaced from each other there. In the joined state of the two insulators (2, 5), the conductive layers (11.1, 11.2) and (10.1, 10.2) placed on the outer side (1.2) and inner side (1.1), respectively, at least on the joint surface ( 4) Contact each other.

Description

technical field [0001] [001] According to the preamble of claim 1, the invention relates to a two- or three-piece insulator system for producing medium and high voltage cable fittings with a self-locking electrically insulating closure for eg securing cable connections. Background technique [0002] [002] These insulator systems are first of all required after the cable connections have been installed, especially in cases where the operating voltage exceeds 1000V, the cable and line connections have to be electrically insulated, or inspection holes for maintenance have to be provided . [0003] [003] The requirements for an insulator system that operates reliably are not limited to easy mechanical closure of the parts of the insulator system to be connected, but also include permanent protection against moisture ingress, gas entrapment and electrical breakdown. [0004] [004] A cable protection tube and a method for its manufacture are known from DE 4416682C1. The cable pr...

AI Technical Summary

Problems solved by technology

But the special disadvantage of these insulators is that at higher voltages above the working voltage of 1000V, it cannot effectively prevent the electrical breakdown of the cable carrying the current to the adjacent cable.

Another major disadvantage is the use of simple mechanical closures which do not effectively prevent gas entrapment in the closed area, thus creating an internal discharge condition

Images