RU29402U1 - Support rod insulator - Google Patents

Description

SUPPORT ROD INSULATOR.

The utility model relates to electrical engineering and relates to supporting insulating structures for HV substations.

A known design of the polymer insulator 1, which contains a rod of insulating material, a tracking-resistant shell, a screen in the form of a semiconducting layer. The screen is located between the rod and the tracking-resistant shell. The disadvantage of this design is the dependence of the mechanical properties of the rod on temperature. The use of large diameter rods is required, which increases the lateral surface and reduces electrical characteristics.

The closest technical solution to the proposed is a supporting rod insulating structure 2. It contains an axial element in the form of a rod. To increase the mechanical strength of the rod, a shell made of fiberglass, previously impregnated with polymer, is formed on it by winding. This forms a monolithic composite rod. A protective insulating tracking-resistant shell is formed by a set of concentric rib rings. On the

the end part is made of terminators in the form of flanges fixed with an adjustable fit at the ends of the rod by means of stoppers, and the terminal on the ground side is at least twice as long as the terminal on the high voltage side.

The disadvantage of this design, namely the use of long terminators, is the insufficient dielectric strength due to the reduction in insulation height at normalized building height, as well as the insufficient tightness of the entire structure against moisture penetration.

The aim of the proposed solution is to increase the electric strength and the exclusion of moisture permeability of the insulator design. This goal is achieved by the fact that in the well-known supporting rod insulator containing a supporting insulating rod made of two insulating elements in the form of a monolith, a protective weather-resistant ribbed shell and metal terminators, an additional insulating part made of material is coaxially aligned with it on the vertical part of each end a protective ribbed shell, the thickness of the additional insulation being at least lyvO of the height of the vertical part of the tip.

The figure shows a General view of the proposed device.

. of a containment shell 4 made advantageously of

silicone rubber, and an additional insulating part 5 of the material of the protective sheath.

In operating conditions, due to the introduction of elements 5, the insulator height of the insulator and the creepage distance are increased, which increases the discharge characteristics of the insulator.

In order to prevent breakdown, the thickness of the additional insulation in the area of the end face of the flange (d) is determined relative to the height of the vertical part of the end piece (h) by the ratio:

It has been experimentally shown that with a ratio of d h / 50, the probability of breakdown of additional insulation in the area of the end face of the terminal increases by more than 2 times.

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Sources of information taken into account when drawing up an application for a utility model:

1. RF patent No. 2074425, cl. H01 B 17/02, published on 02.27.1997. 2. RF patent No. 2173902, cl. P01 B 17/14, 17/02, 17/32, published on 09/20/2001 (prototype)

Claims (1)

A supporting rod insulator comprising a supporting insulating rod made of two insulating elements in the form of a monolith, a weatherproof ribbed sheath and metal terminators, characterized in that an additional insulating piece made of a material of the protective ribbed sheath is aligned with it on the vertical part of each terminal the thickness of the additional insulation is not less than 1/50 of the height of the vertical part of the terminal.