BG64068B1 - Electric insulator for reactors - Google Patents

Abstract

The insulator can be used in the manufacture, repair works and upgrading of reactors. It has higher reliability and it helps simplifying the design and the technology of the reactors. It comprises a supporting body, flanges, eves and reinforcement parts. It is made of phenol epoxy glass-filled composite having orientated continuous fibres. The buses (1) is the zone of flanges (2) and the supporting body (3) are of an axial sheaf (4) and radial layers (5), and in the reinforcement parts (6) they are of the axial sheaf (4), lateral layers (7) and external coating of lateral fibres (8). 1 claim, 2 figures

Description

Technical field

The invention relates to an electrical insulator made of a polymer composite for isolating reactors in high voltage switchgear when fitting the reactor phases individually or in a column one above the other. The insulator is used in the production, repair and modernization of reactors.

BACKGROUND OF THE INVENTION

An electrical insulator is known for isolating the phases of a three-phase reactor when mounted in a switchgear individually or in a column above each other made of porcelain with an external porcelain flanges of non-magnetic metal reinforcement. The disadvantage of the insulator is the low mechanical strength and reliability of the porcelain bodies under dynamic tensile and bending loads. This requires that measures be taken to limit these conditions, complicating the design and technology of the reactor. Another disadvantage is the heating of the metal armature by the induced currents, which limits the installation of the insulator in the areas of strong magnetic fields of the reactor.

SUMMARY OF THE INVENTION

The insulator according to the invention is made of phenol-epoxy glass-filled composite with oriented continuous fibers. The inner structure of the insulator is filled with rails, which in the areas of the flanges and the support body are made of axial sheaves and radial layers, and in the reinforcing parts - of the axial sheaves, transverse layers and outer sheath of transverse fibers. The supporting body and flanges are of alternating axial and radial layers.

Such an insulator structure can be realized by methods (1 and 2).

The advantages of the insulator according to the invention are expressed in the following: high mechanical strength of the insulator under dynamic tensile, flexural and compressive loads; absence of metal fittings and suitability for mounting in the area of strong magnetic fields: increased reliability; possibility for simplification of reactor design and technology.

Descriptions of the attached figures

The electrical insulator according to the invention is shown in Figures 1 and 2, of which FIG. 1 schematically depicts the configuration and internal structure of the insulator, and FIG. 2 - characteristic sections.

The rails 1 in the areas of the flanges 2 and the supporting body 3 are axial sheaf 4 and radial layers 5, and in the fastening parts 6 are of the axial sheaf 4, the transverse layers 7 and the outer sheath of transverse fibers 8. The flanges 2 and the supporting body 3 are of alternating axial 9 and radial 10 layers. A tread-resistant coating may be applied to the surface of the flanges 2. the supporting body 3 and the eaves 11.

An embodiment of the invention

The supporting body 3 of alternating axial 9 and radial 10 layers provides mechanical tensile, compression and flexural strength and together with the eaves 11 - the necessary internal electrical strength and creep resistance. The fastening parts 6 are connected to the axial sheaf 4 by the flanges 2 and the supporting body 3, which together with the transverse layers 7 and the outer sheath of the transverse fibers provide the mechanical tensile strength and bending of the fastening parts.

Claims (1)

Claims High-voltage reactor insulator consisting of a support body, flanges, eaves and fasteners, made of phenol epoxy glass-filled composite with oriented continuous fibers, characterized in that the rails (1) are in the zones of the flanges (2) and the carrier the body (3) is made of an axial sheaf (4) and radial layers (5) and in the fastening parts (6) - of the axial sheaf (4), the transverse layers (7) and the outer sheath of transverse fibers (8).