CN201178247Y

CN201178247Y - Inner and outer high-voltage shielding contact box

Info

Publication number: CN201178247Y
Application number: CNU2008200850909U
Authority: CN
Inventors: 余金松
Original assignee: HANGZHOU SHUGUANG ELECTRIC APPLIANCE CO Ltd
Current assignee: HANGZHOU SHUGUANG ELECTRIC APPLIANCE CO Ltd
Priority date: 2008-04-08
Filing date: 2008-04-08
Publication date: 2009-01-07
Anticipated expiration: 2018-04-08

Abstract

The utility model relates to an internal/external high-voltage shielding contact box which mainly comprises a contact box body, a static contact mounting hole and a copper bar mounting hole formed in the contact box body, a shield ring arranged on the contact box body at the junction part of the static contact mounting hole and the copper bar mounting hole, and a fixing hole for fixing a copper bar and a static contact holder for fixing a static contact, which are arranged on the plane of the shield ring facing the static contact mounting hole. The shielding contact box has the advantages that: the high potential inside the contact box and the copper shield ring are connected and embedded inside an insulator, so as to generate an electrical potential between the contact box and the shield ring, thereby avoiding the discharge phenomenon. The shield ring is welded with the fixing hole at the bottom, so as to result in the discharge, corona and voltage-equalizing potential inside the contact box, realize the potential balance among the A, B and C phases posterior to an external shield strip, eliminate the corona and perform the internal/external shield functions.

Description

Inside and outside high-tension shielding contact box

Technical field

The utility model relates to a kind of contact box, especially a kind of inside and outside high-tension shielding contact box.

Background technology

Along with domestic and international development of electric power industry, the capacity of power station and generating equipment constantly increases, and each regional rural power grids development, and urban network restructuring has increased a lot of 40.5KV high-tension switch cabinets.Common high-voltage contact box in the 40.5KV switch cubicle that uses more or less all exists electric discharge phenomena at present.It can directly have influence on each regional Electrical Safety as important insulating element in the switch cubicle, can cause large-area power-cuts risk, human casualty accident if any accident.

The reason of main appearance discharge is as follows in the actual use of common high-voltage contact box: because high pressure inlet wire and fixed contact are in overhead positions more than the contact box bottom, each position all can make in the switch cubicle discharges.Particularly comparatively concentrated with the Electric Field Distribution of high pressure fixed contact inside center position between phase and phase, and electric field is inhomogeneous, produces corona, and usually fixed contact discharges mutually mutually by insulating material, air dielectric.Long-time discharge can produce a large amount of aqueous vapors, makes air dielectric humidity increase, addition polymerization degree of discharge.In the course of time can make insulating material aging, puncture causes large-area power-cuts, human casualty accident.

The utility model content

The utility model will solve the shortcoming of above-mentioned prior art, and a kind of inside and outside high-tension shielding contact box is provided.

The utility model solves the technical scheme that its technical problem adopts: this inside and outside high-tension shielding contact box, mainly comprise the contact box body, be provided with fixed contact installing hole and copper bar installing hole in the contact box body, on the contact box body of fixed contact installing hole and connection place of copper bar installing hole, be provided with shading ring, face the fixed contact base that the fixing hole that is used for fixing copper bar is installed on the plane of fixed contact installing hole and is used for fixing fixed contact at shading ring.

The effect that the utility model is useful is: the inner high potential of contact box is connected with the copper shading ring and is embedded in insulator inside and makes contact box and housing formation current potential do not have electric discharge phenomena.Position and shading ring at the bottom fixing hole weld together, be contact box produce discharge, corona in inside equal piezoelectricity position, the ABC three-phase reaches even current potential after by the external shield bar, eliminates corona, it is to the effect of interior external shield.

Description of drawings

Fig. 1 is a main TV structure schematic diagram of the present utility model;

Reference numeral: contact box body 1, shading ring 2, fixed contact base 3, fixing hole 4, fixed contact installing hole 5, copper bar installing hole 6.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

As shown in the figure: this inside and outside high-tension shielding contact box, mainly comprise contact box body 1, contact box body 1 is made by epoxy resin; Be provided with fixed contact installing hole 5 and copper bar installing hole 6 in the contact box body 1, on the contact box body 1 of fixed

contact installing hole

5 and 6 connections place of copper bar installing hole, be provided with copper shading ring 2, face at shading ring 2 fixing hole 4 that is used for fixing copper bar and the fixed contact base 3 that is used for fixing fixed contact are installed on the plane of fixed contact installing hole 5.

Operation principle: whether bottom screw in the shielding contact box installs outlet copper bar and inlet wire fixed contact, so the bottom screw is easy to generate corona, discharge most with the upper part.Position and inner shield boxing at the bottom fixing hole are connected together, be contact box produce discharge, corona in inside equal piezoelectricity position, the ABC three-phase reaches even current potential after by the external shield bar, eliminates corona, it is to the effect of interior external shield.

Installation mold → mold heated and batch mixes vacuumize → install the inner shield ring → inspection inner shield box mould → the installation sprue adds injection material → material feeding finish after the 30 back demouldings → taking-ups products → 12 hours → inspection of curing outward appearance → withstand voltage local discharge test → packing dispatch from the factory.

In addition to the implementation, the utility model can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of the utility model requirement.

Claims

1, a kind of inside and outside high-tension shielding contact box, mainly comprise contact box body (1), be provided with fixed contact installing hole (5) and copper bar installing hole (6) in the contact box body (1), it is characterized in that: on the contact box body (1) of fixed contact installing hole (5) and copper bar installing hole (6) connection place, be provided with shading ring (2), in the face of on the plane of fixed contact installing hole (5) fixing hole (4) that is used for fixing copper bar and the fixed contact base (3) that is used for fixing fixed contact be installed at shading ring (2).

2, inside and outside high-tension shielding contact box according to claim 1, it is characterized in that: described contact box body (1) is made by epoxy resin.

3, inside and outside high-tension shielding contact box according to claim 1, it is characterized in that: described shading ring (2) is made of copper.