CN201260030Y

CN201260030Y - Contact box for high-tension switch cabinet

Info

Publication number: CN201260030Y
Application number: CNU2008201623832U
Authority: CN
Inventors: 操隆震; 应兵荣; 余红英; 方蕾; 田元元
Original assignee: Individual
Current assignee: ZHEJIANGSHENG KAIHUA QIYI ELECTRICAL EQUIPMENT CO Ltd
Priority date: 2008-08-11
Filing date: 2008-08-11
Publication date: 2009-06-17
Anticipated expiration: 2018-08-11

Abstract

Disclosed is a contactor box for a high-voltage switch cabinet, the structure of which comprises a cylinder-shaped insulating body; a contactor fixing component is arranged at the top part of the insulating body; and an inner flange and an outer flange are respectively arranged on the inner wall and the outer wall of the insulating body. The contactor box is characterized in that the wall thickness of the insulating body from the base part of the inner flange to the base part of the outer flange is 17mm; and the specific distance of creepage of the insulating body is bigger than 22mm/kV. Compared with prior art, through being repeatedly tested and studied, the contactor box changes the former national standard wall thickness of the insulating body between the base part of the inner flange and the base part of the outer flange designed from 13mm into 17mm, and increases specific distance of creepage from 20mm/kV to more than 22mm/kV; so as to effectively improve the electric-resisting property, mechanical property, and dirtiness and condensation grades of the contactor box; after being tested, the contactor box can meet the requirement of working at the altitude from 1000 meters to 2000 meters, and the applicability of the product is increased.

Description

Contact box for high-voltage switchgear

[technical field]

The utility model belongs to a kind of and the matching used annex of power equipment, especially belongs to a kind of contact box that uses with the high-tension switch cabinet coupling.

[background technology]

At present, with the contact box that the high-tension switch cabinet coupling is used, its structure generally comprises a tubular insulator, and insulator head is provided with parts such as contact fixture, all is provided with the shirt rim on the internal and external walls, and the bottom is provided with the line seat, and the bottom has adpting flange.Busbar radially inserts a groove and stretches into the insulator endoporus from insulator sidewall top.There is following problems in actual applications in the contact box of this structure: the insulator wall insulation property are poor, creepage littler than distance, therefore, influenced by electric durability energy and mechanical performance, product can only be applicable to that height above sea level is lower than the area below 1000 meters, promptly regional in service more than 1000 meters at high height above sea level, easily produce filth and condensation, thereby limited the scope of application of product.

[summary of the invention]

For overcoming the problems referred to above that prior art exists, the utility model aims to provide the novel contact box that uses with high-tension switch cabinet coupling of a kind of structure, this contact box filthy and condensation grade height, electric durability energy and good mechanical property can satisfy height above sea level normally operation below 2000 meters.

For achieving the above object, the utility model has adopted following technical scheme: this contact box that uses with the high-tension switch cabinet coupling, its structure comprises a tubular insulator, insulator head is provided with the contact fixture, the inside and outside wall of described insulator is provided with inner skirt and outer skirt, it is characterized in that: the base portion of inner skirt to the wall thickness of the base portion insulator of outer skirt is 17 millimeters.

Aforesaid contact box is characterized in that: the creepage ratio distance of insulator is greater than 22mm/kV.

Beneficial effect: compared with prior art, the utility model is by repetition test, exploration, after originally making 17 millimeters into from 13 millimeters according to the inner skirt base portion of national standard design to the wall thickness of insulator between the outer skirt base portion, creepage ratio is apart from being increased to greater than behind the 22mm/kV from 20mm/kV, electric durability energy and mechanical performance, filth and the condensation grade of this contact box have effectively been improved, after tested, can satisfy the normal operation under 1000-2000 meters conditions of height above sea level, thereby improve the applicability of product.

[description of drawings]

Fig. 1 is vertical sectional structure schematic diagram of an embodiment of the utility model.

Fig. 2 is the left view of Fig. 1.

Among the figure: insulator 1, outer skirt 2, busbar line outlet 3, fixed contact 4, inner skirt 5, fixing threaded hole 6.

[embodiment]

Referring to Fig. 1, and in conjunction with Fig. 2.The top of tubular insulator 1 is provided with the contact fixture, and fixed contact 4 is arranged on the inwall at top, and the inside and outside wall of insulator 1 is provided with inner skirt 5 and outer skirt 3.Inner skirt 5 base portions to the wall thickness of insulator 1 between outer skirt 3 base portions is 17 millimeters.

The creepage ratio distance of insulator is greater than 22mm/kV, and 2 grades of gradation for surface pollution 20mm/kV bring up to 22mm/kV by GB.

Claims

1, a kind of contact box for high-voltage switchgear, comprise a tubular insulator (1), insulator (1) top is provided with the contact fixture, the inside and outside wall of described insulator (1) is provided with inner skirt (5) and outer skirt (2), it is characterized in that: the base portion of inner skirt (5) to the wall thickness of the base portion insulator (1) of outer skirt (2) is 17 millimeters.

2, contact box as claimed in claim 1 is characterized in that: the creepage ratio distance of insulator (1) is greater than 22mm/kV.