CN2166543Y

CN2166543Y - Full-working-condition contact box

Info

Publication number: CN2166543Y
Application number: CN 93219019
Authority: CN
Inventors: 林韶光
Original assignee: MUTUAL INDUCTOR FACTORY SIHUI
Current assignee: MUTUAL INDUCTOR FACTORY SIHUI
Priority date: 1993-07-13
Filing date: 1993-07-13
Publication date: 1994-05-25
Anticipated expiration: 2003-07-13

Abstract

The utility model relates to a be used as the contact box of high tension switchgear accessory, this contact box is with nut embedding ring flange mounting hole in, avoided the installation back nut to expose to increased creepage distance, simultaneously, the contact box inner chamber is the rectangle, makes the electric field tend towards evenly. In addition, the skirting belts are additionally arranged at the top of the inner cavity and the top of the box body, so that the creepage distance is further increased. The product of the utility model meets the use requirements under the conditions of all working conditions (humidity, condensation and II-level pollution) through tests.

Description

Contact terminal box

The utility model relates to a kind of contact box as the high-tension switch cabinet accessory.

Existing contact box is made of box body, terminal block, ring flange and contact, and ring flange is positioned at the outer basifacial of box body, and the inside, box body bottom is an inner chamber.This contact box is because the installing hole on its ring flange is a through hole that supplies screw to pass, and screw and nut expose after installing; In addition, the cross section of inner chamber is circular; So its creepage distance is little, electric field is even inadequately, is not suitable for using under full operating mode (humidity, condensation, the filth of the II level) condition.

The purpose of this utility model is that existing contact box is made improvements, and makes it increase creepage distance, to be suitable for use under the full working condition.

Measure of the present utility model is to embed in the ring flange as installing hole with nut, and makes its top insulation (sealing during casting), simultaneously, contact box inner chamber (cross section) is made rectangle, makes the inner chamber electric field be tending towards even.

Can also set up opotism with further increase creepage distance at interior top of chamber or box body top.

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

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is that the A of terminal block part among Fig. 1 is to view.

Fig. 3 is the upward view of the utility model (Fig. 1).

Referring to figs. 1 through Fig. 3, contact box of the present utility model is made of box body (1), terminal plate (2), ring flange (3) and contact (5). Terminal plate (2) is positioned at box body (1) top. Box body is bell shape, can be formed by the insulating resin casting. Ring flange (3) is positioned at outside, box body bottom, and installing hole (8) is arranged on it, should Installing hole embeds ring flange by nut and forms, its top insulation, when normally casting box body together with the installing hole top seal. Box body bottom the inside is an inner chamber (4), and contact (5) is positioned at this inner cavity top, and the cross section of inner chamber is rectangle, can do in the arc-shapedly for its four jiaos, and the length of side a of rectangular inner cavity (4) is generally 150～190mm. Can add an opotism (6) at inner chamber (4) top, perhaps add opotism (7) at the box body top, with further increase creep age distance.

A kind of exemplary embodiments of the present utility model is: the length of side a of rectangular inner cavity (4) is 160mm, and a circle opotism (6) and (7) is arranged respectively at inner chamber (4) top and box body (1) top, and all the other structures as previously described.

Contact box of the present utility model is owing to embed nut in the ring flange installing hole, and insulated in its top, back screw and nut are installed not to be exposed, thereby increased creepage distance effectively, simultaneously, the contact box inner chamber is made rectangle, make the inner chamber electric field be tending towards even, it is little to have overcome existing contact box creepage distance, and electric field is even inadequately, does not meet the shortcoming of instructions for use under the full working condition.Contact box of the present utility model is through test, and all index meets the instructions for use under full operating mode (humidity, condensation, the filth of the II level) condition.

Claims

1, a kind of contact box as the high-tension switch cabinet accessory, be made of box body (1), terminal block (2), ring flange (3) and contact (5), terminal block is positioned at the box body top, and ring flange is positioned at outside, box body bottom, the inside, box body bottom is an inner chamber (4), and contact (5) is positioned at this top of chamber; The installing hole (8) that it is characterized in that ring flange (3) is formed by nut embedding ring flange, its top insulation; The cross section of inner chamber (4) is a rectangle.

2,, it is characterized in that an opotism (6) is arranged at inner chamber (4) top according to the described contact box of claim 1.

3,, it is characterized in that an opotism (7) is arranged at box body (1) top according to claim 1 or 2 described contact boxs.

4, according to claim 1 or 2 described contact boxs, the length of side a that it is characterized in that inner chamber (4) is 150～190mm.

5, according to the described contact box of claim 3, the length of side a that it is characterized in that inner chamber (4) is 150～190mm.

6, according to the described contact box of claim 5, the length of side a that it is characterized in that inner chamber (4) is 160mm.