CN2433722Y

CN2433722Y - Full-outdoor-type dry high-tension current inductor

Info

Publication number: CN2433722Y
Application number: CN 00243666
Authority: CN
Inventors: 徐腊元; 易平; 褚朝圣
Original assignee: Dianyan Huayuan Power Tech Co Ltd Beijing
Current assignee: Dianyan Huayuan Power Tech Co Ltd Beijing
Priority date: 2000-07-21
Filing date: 2000-07-21
Publication date: 2001-06-06
Anticipated expiration: 2010-07-21

Abstract

The utility model discloses a full-outdoor type dry high-voltage current mutual inductor, which comprises a mutual inductor coil, a high-voltage one-time in-out line, a secondary line, and a secondary leading-out terminal. The utility model is characterized in that the mutual inductor coil and the high-voltage one-time in-out line are fixed on the main body part of an insulator by casting. The utility model can solves the defects of the outdoor used current mutual inductor which with the existing structure. The utility model has the advantages that the size can be reduced, and the installation becomes more convenient.

Description

The outdoor Dry Type High Tension Current Transformer

The utility model relates to the instrument transformer field, especially a kind of outdoor Dry Type High Tension Current Transformer.

The 10KV level current transformer that present China uses out of doors probably has 3 kinds of structures:

One, oil immersed type: the iron core of instrument transformer is immersed in the fuel tank made of iron, and as high pressure turnover line and secondary exit, the oil in the fuel tank mainly plays insulation and cooling to the fuel tank peripheral hardware in respect of insulator.The instrument transformer volume of this mode is big, moulding is stupid, Heavy Weight, is unfavorable for on-the-spot installation, and in use because the existence of oil can be blasted, maintenance load is big.

Two, oil free type: the iron core of instrument transformer is cast with epoxy resin, the transformer iron core that casting is good is placed in the iron casing, the outside same design of casing has insulator, as high pressure turnover line and secondary exit, this kind product has saved oil, and its performance has had further raising, but volume is still big, and moulding is single, the installation at unfavorable scene and wiring.

Three, the insulator oil free type: the iron core of instrument transformer is cast with epoxy resin, the transformer iron core that casting is good is placed in the special insulator, be provided with the high pressure lead-out wire at the top of insulator, bottom design at insulator has low pressure end to occur, because the outside porcelain spare that adopts, a lot of shortcomings that iron casing uses have out of doors been solved, dwindled the volume of product, but since the proper property of porcelain, the bump when having determined to be unfavorable for transporting and installing, and volume is still very big, can not with the supporting use of circuit breaker, this can install separately out of doors, and the secondary connection end do not have rain insensitive device, is unfavorable for long-term use.

The purpose of this utility model provides a kind of outdoor Dry Type High Tension Current Transformer, and the current transformer that it can solve existing structure uses the shortcoming of existence out of doors, and its volume is dwindled more, and is easier for installation.

The purpose of this utility model is such realization: a kind of outdoor Dry Type High Tension Current Transformer, comprise that mutual inductor coil, high pressure once pass in and out line, secondary line and secondary leading-out terminal, mutual inductor coil and high pressure once pass in and out line is fixed on insulator by the method for casting main part.

The main part of the insulator of high-tension current inductor is circular.

The small cylinder that big or small full skirt shape is arranged at the two ends of main part, high pressure once pass in and out line and penetrate through the center of the coil of instrument transformer from the small cylinder of an end, and the small cylinder from the other end passes again.

It below the insulator bearing.

The secondary line that links to each other with circuit breaker is drawn by the external interface place of bearing.

The secondary leading-out terminal is located in the terminal box of bearing, and secondary line is drawn from terminal box, and terminal box is passed through screw.

Bearing partly locates to be provided with full skirt near insulating body.

The utlity model has following advantage:

One, because the iron core of instrument transformer adopts outdoor resin cast to make casing current transformer, pass the circular hole of high-voltage line in the middle of instrument transformer, do not establish lead-out wire of high pressure in addition, be provided with the secondary leading-out terminal on the body of instrument transformer, make its small product size little, overall volume of the present utility model only is 1/4 of a former oil immersed type, beautified the moulding of product, reduced the land area that the substation takies, be convenient to the design of miniaturization transformer station, for country has saved valuable land resource.

Two, owing to adopt complete outdoor resin and silicon rubber casting to form, make its insulating properties height, anti-ultraviolet aging ability strong, simplified assembling process of products, solved the former harm that can bring blast when insulating of making of oil simultaneously.

Three, the performance of product is disposable non-maintaining product than original product height, and the workload of removing maintenance from reduces maintenance cost.

Four, applicability is strong, convenient and flexible installation, mode variation, and the scope of application of product has been widened in secondary outlet variation, can or independently install and use with the supporting use of circuit breaker; Can remove the waste of the design iterations exploitation that brings owing to the difference of mounting means from, the selection for the user simultaneously provides convenience.

Below in conjunction with concrete structure and the operation principle of accompanying drawing detailed description according to the outdoor Dry Type High Tension Current Transformer that the utility model proposes.

Fig. 1 is a cutaway view of the present utility model;

Fig. 2 moves towards figure for installation and the secondary line that the utility model is installed on the circuit breaker;

Fig. 3 is the front view of the secondary line connected mode of the utility model when independently installing;

Fig. 4 is the partial sectional view of Fig. 3;

Fig. 5 is that the A of Fig. 4 is to view.

As shown in Figure 1, the utility model outdoor Dry Type High Tension Current Transformer comprises that mainly mutual inductor coil 1, high pressure once pass in and out line (a sub-high pressure busbar) 2, insulator 3 and secondary leading-out terminal.

The main part 33 of the insulator 3 of high-tension current inductor is circular, the coil 1 of instrument transformer and high pressure once pass in and out line 2 and are fixed therein by the method for casting, it below the insulator 3 bearing 32, main plaing a part supported and fixes, the small cylinder 31 that big or small full skirt shape is arranged at the two ends of main part 33, high pressure once passes in and out line 2 and penetrates through the center of the coil 1 of instrument transformer from the small cylinder 31 of an end, and the small cylinder 31 from the other end passes again.

The utility model both can be installed on the breaker body, can independently install on the line with in the transformer station again, and therefore, the lead-out mode of secondary leading-out terminal has two kinds of schemes.

When the utility model was installed on the breaker body, as shown in Figure 2, secondary line 5 was drawn by external interface 7 places of bearing 32, and instrument transformer once passes in and out line 2 by high pressure and is installed on the circuit breaker with external interface 7.

When the utility model on the line with transformer station in during independent the installation, shown in Fig. 3,4,5, secondary line 5 is connected on the secondary connection end 6, the secondary leading-out terminal is located in the terminal box 8 of bearing 32, secondary line is drawn from terminal box, terminal box is fixing by screw 9,

Bearing 32 of the present utility model is provided with full skirt near insulating body part 33 places, and it mainly act as: the creepage distance that, increases outer surface; Two, improve the antifouling grade that product uses out of doors; Three, beautify the profile of product.

Claims

1, a kind of outdoor Dry Type High Tension Current Transformer, comprise that mutual inductor coil, high pressure once pass in and out line, secondary line and secondary leading-out terminal, is characterized in that: mutual inductor coil and high pressure once pass in and out line is fixed on insulator by the method for casting main part.

2, outdoor Dry Type High Tension Current Transformer as claimed in claim 1 is characterized in that: the main part of the insulator of high-tension current inductor is for circular.

3, outdoor Dry Type High Tension Current Transformer as claimed in claim 2, it is characterized in that: the small cylinder that big or small full skirt shape is arranged at the two ends of main part, high pressure once passes in and out line and penetrates through the center of the coil of instrument transformer from the small cylinder of an end, and the small cylinder from the other end passes again.

4, outdoor Dry Type High Tension Current Transformer as claimed in claim 1 is characterized in that: be bearing below the insulator.

5, outdoor Dry Type High Tension Current Transformer as claimed in claim 4 is characterized in that: the secondary line that links to each other with circuit breaker is drawn by the external interface place of bearing.

6, outdoor Dry Type High Tension Current Transformer as claimed in claim 4, it is characterized in that: the secondary leading-out terminal is located in the terminal box of bearing, and secondary line is drawn from terminal box, and terminal box is passed through screw.

7, outdoor Dry Type High Tension Current Transformer as claimed in claim 4 is characterized in that: bearing partly locates to be provided with full skirt near insulating body.