CN201392730Y

CN201392730Y - High-voltage SF6 current transformer

Info

Publication number: CN201392730Y
Application number: CN200920032777U
Authority: CN
Inventors: 刘拴拴
Original assignee: XI'AN AIBO ELECTRIC CO Ltd
Current assignee: XI'AN AIBO ELECTRIC CO Ltd
Priority date: 2009-04-24
Filing date: 2009-04-24
Publication date: 2010-01-27
Anticipated expiration: 2019-04-24

Abstract

The utility model relates to high-voltage electric equipment, in particular to a high-voltage SF6 current transformer. The existing SF6 current transformer the uneven electric field, so as to affect the electric property of a product easily, and the existing SF6 current transformer is difficult to be assembled. The high-voltage SF6 current transformer provided by the utility model at least comprises a shell, a primary coil group, a secondary coil group, an insulator, a prop and a base that are connected with each other from top to bottom, wherein the primary coil group and the secondary coil group are arranged in the shell; the high-voltage SF6 current transformer is characterized in that a spherical shield case is arranged in the shell; the lower end of the spherical shield case is provided with the disk insulator, and the interior thereof is provided with the secondary coil group; the primary coil group is penetrated through the middle part of the secondary coil group; and the primary coil group extends out of the shell by penetrating through the two ends of the spherical shield case. With the adoption of the spherical shield case, the electric field is distributed without vortex consumption, and the assembling is simple.

Description

High pressure SF6 current transformer

Technical field

The utility model relates to high-voltage electrical equipment, specifically is meant a kind of high pressure SF6 current transformer.

Background technology

For a long time, use oil-immersed current transformer on the market, its main insulation adopts the paper oil insulation structure, and the factor that influences this instrument transformer quality is a lot, as long as there is a link not control well, the partial discharge and the dielectric loss that will influence product increase, thereby cause the progressively destruction of main insulation, even form the discharge of electrification in high voltage position above earth potential, cause the fry dried food ingredients in the instrument transformer to give birth to burning and produce huge pressure, Chang Rongyi makes the product blast, and security incident takes place.

The SF6 current transformer is the New type of current instrument transformer that occurred in recent years, because SF6 gas electric strength height, the arc extinguishing ability is strong, chemical stability is good, therefore, be used as dielectric and be applied in the current transformer, compare with oil-immersed current transformer, the SF6 current transformer adopts all-sealed structure, be used for the open air, have high dynamic thermal stability, high accuracy, antifouling, fire-retardant, safe and reliable, easy maintenance, advantage such as need not overhaul, and the SF6 current transformer that occurs in the market, structure is " T " font (a hammer type), this instrument transformer adopts the concentric cylinder electric field, and at the edge of cylinder, electric field is very inhomogeneous, influence the electric property of product easily, and some assembling restraint location of this series products is comparatively hidden, can not direct visual assembling, often need grope assembling, the assembling difficulty.

The utility model content

The purpose of this utility model is to provide a kind of high pressure SF6 current transformer, to solve the problem that electric field is inhomogeneous in the background technology, assembling is difficult.

For achieving the above object, the technical solution adopted in the utility model is:

A kind of high pressure SF6 current transformer, at least by housing, primary winding group and secondary coil group, insulator, support insulator, base in the housing are formed by connecting from top to bottom, it is characterized in that: be provided with the spherical shield cover in the described housing, spherical shield cover lower end is provided with disc insulator, its inside is provided with the secondary coil group, and secondary coil group middle part wears the primary winding group, and the primary winding group is passed spherical shield cover two ends and stretched out from housing.

Above-mentioned housing is the bell jar type.

Above-mentioned housing top is provided with pressure relief device.

Above-mentioned pressure relief device is a rupture disk.

Above-mentioned primary winding group is that contact rod penetrates the contact tube formation, and contact tube and contact rod two ends are provided with input terminal and outlet terminal, and input terminal is connected with the primary winding group respectively with outlet terminal.

Compared with prior art, the utlity model has following advantage and effect:

1, the utility model housing profile is the bell jar type, and material is a rustproof aluminum alloy, and secondary winding is loaded in the spherical shield cover, and its Electric Field Distribution is even, no eddy current loss.

2, the utility model adopts the cordwood system type assembling, can realize mechanized operation, has avoided the dispersiveness of product assembling human factor, has improved the stability of properties of product, makes properties of product more become reliable.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is that the A of Fig. 1 is to view;

Fig. 3 is the utility model enclosure interior primary winding cascaded structure schematic diagram;

Fig. 4 is the utility model enclosure interior primary winding parallel-connection structure schematic diagram;

Wherein, 1-housing, 2-support insulator, the 3-base, 4-radome, 5-secondary coil group, the 6-insulator, 7-contact tube, 8-contact rod, the 9-pressure relief device, 10-secondary terminal terminal block, 11-density monitor, 12-inflates self-styled valve, 13-input terminal, 14-outlet terminal, the 15-end of incoming cables is flexible coupling, and 16 leading-out terminals are flexible coupling.

Embodiment

Referring to Fig. 1, Fig. 2, a kind of high pressure SF6 current transformer, by housing 1, the primary winding group 7 of enclosure interior, secondary coil group 5 and disc insulator 6, support insulator 2, base 3 connects and composes up and down, housing 1 top is provided with pressure relief device 9, pressure relief device 9 is a rupture disk, housing 1 lower end is connected with support insulator 2, support insulator 2 is high-strength porcelain or silicon rubber, housing 1 and base 3 can be linked together by support insulator 2, housing 1 inside is provided with spherical shield cover 4, equidistant setting between spherical shield cover 4 and the housing 1, spherical shield cover 4 lower ends are provided with disc insulator 6, its inside is provided with secondary coil group 5, secondary coil group 5 is arranged on the inside of spherical shield cover 4, the primary winding group is passed spherical shield cover 4 and secondary coil group 5 and is stretched out from housing 1 two ends, the primary winding group is the hollow contact tube 7 and the solid contact rod 8 of two mutually insulateds, wherein contact rod 9 is in the inside that penetrates contact tube 7, contact tube 7, contact rod 8 two ends are provided with input terminal 13 and outlet terminal 14, input terminal 13 is connected with the primary winding group respectively with leading-out terminal 14 sons, and the primary winding group is passed spherical shield cover 4 simultaneously; Be provided with secondary terminal terminal block 10 in the base 3, density monitor 11 and inflation self-closing valve 12;

Referring to Fig. 3, primary winding group series connection line chart for the utility model current sensor, the path of flowing through of electric current is: electric current flows into from the flange P1 limit of input terminal 13, flow through hollow contact tube 7,, flow to the left side of housing 1 again from flange C2 limit from the flange C2 outflow of hollow contact tube 7, again by the 15 flange C2 positions that flow to solid contact rod 8 that are flexible coupling, end of incoming cables, flow into from this point again, flow to its outlet limit, flow out from flange P2 limit by outlet terminal 14 by solid contact rod.

Referring to Fig. 4, be the primary winding group of the utility model current sensor winding diagram in parallel, the path of flowing through of electric current is: electric current flows into simultaneously from the flange P1 limit of input terminal 13 and the flange C1 limit of solid contact rod 8, flow through hollow contact tube 7 and solid contact rod 8, one the tunnel directly flows out from flange P2 limit through outlet terminal 14 from solid contact rod 8, another road, is flexible coupling through leading-out terminal and 16 flows out from flange P2 limit through housing 1 from the flange C2 of hollow contact tube 7.

Claims

1, a kind of high pressure SF6 current transformer, at least by housing (1), primary winding group (7) in the housing (1) and secondary coil group (5), disc insulator (6), support insulator (2), base (3) is formed by connecting from top to bottom, it is characterized in that: be provided with spherical shield cover (4) in the described housing (1), spherical shield cover (4) lower end is provided with disc insulator (6), its inside is provided with secondary coil group (5), secondary coil group (5) and spherical shield cover (4) middle part are equipped with the primary winding group, and the primary winding group is passed spherical shield cover (4) two ends and stretched out from housing (1).

2, according to the described a kind of high pressure SF6 current transformer of claim 1, it is characterized in that: described housing (1) is the bell jar type.

3, a kind of high pressure SF6 current transformer according to claim 1 and 2, it is characterized in that: the top of described housing (1) is provided with pressure relief device (9).

4, a kind of high pressure SF6 current transformer according to claim 3, it is characterized in that: described pressure relief device (9) is a rupture disk.

5, a kind of high pressure SF6 current transformer according to claim 4, it is characterized in that: described primary winding group is that contact rod (8) penetrates contact tube (7) formation, contact tube (7) and contact rod (8) two ends are provided with input terminal (13) and outlet terminal (14), and input terminal (13) is connected with the primary winding group respectively with outlet terminal (14).