CN201332013Y

CN201332013Y - Combined outdoor voltage transformer

Info

Publication number: CN201332013Y
Application number: CNU2008202323604U
Authority: CN
Inventors: 滕守权; 刘文浩; 荣香倩; 于景艳
Original assignee: Dalian No2 Instrument Transformer Co Ltd
Current assignee: Dalian No2 Instrument Transformer Co Ltd
Priority date: 2008-12-30
Filing date: 2008-12-30
Publication date: 2009-10-21
Anticipated expiration: 2018-12-30

Abstract

A combined outdoor voltage transformer comprises primary terminals, a resin case, primary and secondary windings, iron cores and primary and secondary frameworks; wherein, the primary and the secondary windings, the iron cores and the primary and the secondary frameworks are arranged in the resin case; the primary terminals are arranged on the top of the resin shell, and are connected with the primary windings through primary fuses; the primary and the secondary windings are respectively wound on the primary and the secondary frameworks; and corresponding to the outer and the inner layers, the primary and the secondary frameworks are arranged on the legs of the C-shaped iron cores. The voltage coils are casted with resin into an integral structure. The three primary fuses are mounted in the resin case. The utility model, which has the advantages of scientific, reasonable and ingenious design, stable performance, reliable operation, convenient mounting, easy operation and low operation cost, is highly practicable and advanced and is generally used in the transformer production industry and electricity overhaul.

Description

The outdoor voltage transformer of composite type

Technical field

The utility model relates to voltage transformer, what be specifically related to is the outdoor voltage transformer of composite type.

Background technology

Traditional outdoor voltage transformer does not have built-in fuse protection; adopt two separate unit voltage transformers to combine; the obvious floor space of such combination is huge; the equipment that uses just many (getting external fuse protection); the investment funds are more; maintenance on ordinary days is also big, and operation cost is just high naturally.

At the problem of above-mentioned existence, the professional person takes measures to solve this fundamental issue by every means.Yet in the whole bag of tricks on probation, exist separately shortcoming and problem, such as the scheme complexity, the components and parts of use are more, cause virtually installation, the operation all comparatively bothersome, cost is also high naturally, weighs the advantages and disadvantages, and these methods on probation all are not suitable for promoting the use of in practical power systems.

Summary of the invention

The purpose of this utility model is to adopt two single-phase potential transformers to combine mostly at present outdoor voltage transformer, cause the occupation of land space big, problems such as trouble are installed, thereby provide a kind of anti overvoltage ability composite type strong, easy to install outdoor voltage transformer.

The technical scheme that adopts is:

The outdoor voltage transformer of composite type comprises A, B, C three-phase three primary connection ends, resin enclosures and is installed in two " C type " iron core in the resin enclosure, A, B, C three corresponding A, C phase winding, A, C phase secondary winding and A, a C first and second skeleton mutually; Described A, B, three primary connection ends of C three-phase are arranged on the top of three resin umbrella posts, and resin umbrella post is arranged on the top of resin enclosure; Above-mentioned A, C mutually first and second winding are wrapped in respectively on skeleton and the secondary skeleton, A, C mutually first and second winding respectively correspondence be positioned at nexine and outer and coaxial being installed in respectively on two " C type " stem unshakable in one's determination; A, C phase secondary winding are connected with the secondary terminal of lower terminal box by lead-in wire respectively, and the lower terminal box is positioned at the bottom of resin enclosure; The bottom of resin enclosure is provided with the installation base plate.

Its design feature is:

The following correspondence respectively of described A, B, three primary connection ends of C three-phase is provided with A, B, three fuse RD of C three-phase _A, RD _BAnd RD _C, A phase primary connection end is by leader cable and the A RD of fuse mutually _AA contact is connected, A phase fuse RD _AAnother contact and A mutually an end of a winding be connected, A is the other end and the B fuse RD mutually of a winding mutually _BA contact be connected simultaneously with C mutually an end of a winding be connected, the other end of a winding of C phase and C be fuse RD mutually _CA contact be connected C phase fuse RD _CAnother contact and C mutually the primary connection end be connected;

Above-mentioned B phase fuse RD _BAnother contact by leader cable and B mutually the primary connection end be connected;

So just constitute the V-V wiring construction of voltage transformer, and guarantee that a terminal communicates with a fuse;

A, B, C three-phase primary connection end are positioned on three summits of a plane isosceles triangle, and A, B, C three-phase primary connection end, A, B, C three-phase three resin umbrellas post and resin enclosure constitute integral structure by cast.

An above-mentioned fuse is the typing finished product.

Above-mentioned A, C " C type " iron core that adopts unshakable in one's determination mutually.

Above-mentioned A, C be a fuse RD mutually _A, RD _CWith A, the C corresponding respectively main insulation that is provided with between winding mutually.

Principle of the present utility model and characteristics:

A winding of the present utility model adopts the low magnetic density design, has increased the number of turn of layer insulation thickness and coil, and product anti overvoltage ability is strengthened.

Once adopt the V-type wiring, A, B, C three-phase have a fuse protection, and the primary connection end communicates with a fuse inside, and the outside splits, and it is convenient to change a fuse.

Adopt the high-quality C sections heart to substitute laminated core, the no-load loss and the no-load current of the C sections heart are all little, improved the carrying load ability of product, also improved simultaneously operating efficiency, as long as first and second winding is installed in first and second skeleton, be enclosed within on the unshakable in one's determination stem skeleton is coaxial again, get final product with steel band is fastening then.

Increased the surface creepage distance of product, creep distance can reach 500mm, and product has reached IV level gradation for surface pollution, and safety, environmental protection can be used at 3000 meters of height above sea level and following area.

Adopt overall construction design, volume is little, and is in light weight, dwindled the occupation of land space, is easy to the installation of any direction.

Combination voltage instrument transformer of the present utility model is an overall structure; volume is little; easy for installation, have the built-in fuse protection of three-phase, avoided causing the damage of instrument transformer because of overvoltage and short circuit; and a built-in fuse is convenient to change; be easy to safeguard that combination voltage instrument transformer of the present utility model is excellent performance but also take up an area of for a short time not only, has immeasurable value to saving limited land resources; be renewal product of new generation, it is the key equipment that control and instrument show.

The utility model design science, reasonable, original, stable performance, reliable has extremely strong practicality and advance, and is easy for installation, simple to operate, operation cost is low, and suitable instrument transformer production industry and electric power maintenance are used.

Description of drawings

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

Fig. 2 is that schematic diagram is looked on the left side of Fig. 1.

Fig. 3 is the schematic top plan view of Fig. 1.

Fig. 4 is the utility model back panel wiring schematic diagram.

Embodiment

The outdoor voltage transformer of composite type comprises A, B, three primary connection ends of C three-

phase

1,2 and 3, resin enclosure 9 and two " the C type " in the resin enclosure 9 of being installed in is unshakable in one's determination 8 and 16, A, B, C three are corresponding A, C winding 4 and 14, A, C

secondary winding

6 and 15 and A, C first and

second skeleton

4,12,6 and 13 mutually mutually mutually; A, B, three primary connection ends of C three-

phase

1,2 and 3 are arranged on the top of three resin umbrella posts 18, resin umbrella post 18 is arranged on the top of resin enclosure 9, and A, B, three primary connection ends of C three-

phase

1,2 and 3 following correspondence respectively are provided with A, B, three fuse RD of C three-phase _A, RD _BAnd RD _C, A phase primary connection end 1 is by leader cable and A fuse RD mutually _AA contact be connected A phase fuse RD _AAnother contact and A mutually an end of a winding 5 be connected, A is the other end and the B fuse RD mutually of a winding 5 mutually _BA contact be connected simultaneously with C mutually an end of a winding 14 be connected, the other end of a winding 14 of C phase and C be fuse RD mutually _CA contact be connected C phase fuse RD _CAnother contact and C mutually primary connection end 3 be connected;

Above-mentioned B phase fuse RD _BAnother contact by leader cable and B mutually primary connection end 2 be connected;

A, C mutually winding 5 and 14, A, C mutually

secondary winding

6 and 15 respectively correspondence be wrapped on

skeleton

4,12 and the secondary skeleton 7,13, A, C mutually winding 5 and 14,

secondary winding

6 and 15 respectively correspondence be positioned on nexine and the outer and coaxial stem that is installed in two " C type " unshakable in one's determination 8 and 16 respectively; So just constitute the V-V wiring construction of voltage transformer, and guarantee that the primary connection end communicates with a fuse 2;

A, C phase

secondary winding

6 and 14 two ends are connected with secondary terminal in the lower terminal box 10 by lead-in wire respectively; Lower terminal box 10 is positioned at the bottom of resin enclosure 9, and the bottom of resin enclosure 9 is provided with installs base plate 11; A, B, C three-phase

primary connection end

1,2 and 3 are positioned on three summits of a plane isosceles triangle, and A, B, three primary connection ends of C three-

phase

1,2 and 3, resin umbrella post 18 and resin enclosure 9 constitute integral structure by cast;

Above-mentioned A, C be a fuse RD mutually _A, RD _CBe respectively arranged with main insulation 17 between a winding 5,14 mutually with A, C.

Claims

1, the outdoor voltage transformer of composite type comprises A, B, three primary connection ends of C three-phase (1) (2) and (3), resin enclosure (9) and is installed in corresponding A, the C winding of phase (5) of two " C type " (8) unshakable in one's determination and (16), A, B in the resin enclosure (9), C three and (14), A, C secondary winding (6) and (15) and A, C first and second skeleton (4) (12) (7) and (13) mutually mutually; Described A, B, three primary connection ends of C three-phase (1) (2) and (3) are arranged on the top of resin umbrella post (18), resin umbrella post (18) is arranged on the top of resin enclosure (9), above-mentioned A, C is a winding (5) mutually, (14) and A, C phase secondary winding (6), (15) correspondence is wrapped in A respectively, C is a skeleton (4) mutually, (12) and secondary skeleton (7), (13) on, A, C is a winding (5) mutually, (14) and secondary winding (6), (15) correspondence is positioned at outer and nexine and the coaxial A that is installed in respectively respectively, on the stem of two " C type " (8) and (16) unshakable in one's determination of C phase; The two ends of A, C phase secondary winding (6) and (14) are connected with secondary terminal in the lower terminal box (10) by lead-in wire respectively; The bottom of resin enclosure (9) is provided with installs base plate (11); It is characterized in that:

The following correspondence respectively of A, B, three primary connection ends of C three-phase (1), (2) and (3) is provided with A, B, three fuse RD of C three-phase _A, RD _BAnd RD _C, A phase primary connection end (1) is by leader cable and A fuse RD mutually _AA contact be connected A phase fuse RD _AAnother contact and A mutually an end of a winding (5) be connected, A is the other end and the B fuse RD mutually of a winding (5) mutually _BA contact be connected simultaneously with C mutually an end of a winding (14) be connected, the other end of a C winding of phase (14) and C be fuse RD mutually _CA contact be connected C phase fuse RD _CAnother contact and C mutually primary connection end (3) be connected;

Above-mentioned B phase fuse RD _BAnother contact by leader cable and B mutually primary connection end (2) be connected;

A, B, C three-phase primary connection end (1), (2) and (3) are positioned on three summits of a plane isosceles triangle, A, B, C three-phase primary connection end (1, (2) and (3), resin umbrella post (18) and resin enclosure (9) constitute integral structure by cast.

2, the outdoor voltage transformer of composite type according to claim 1 is characterized in that: above-mentioned A, C be two unshakable in one's determination employings mutually " the C type " (8) and (16) unshakable in one's determination.

3, the outdoor voltage transformer of composite type according to claim 1, it is characterized in that: above-mentioned A, C be a fuse RD mutually _A, RD _CBe respectively arranged with main insulation (17) mutually between a winding (5), (14) with A, C.