CN201489992U

CN201489992U - Three-phase cable fuse voltage transformer

Info

Publication number: CN201489992U
Application number: CN2009202030561U
Authority: CN
Inventors: 李涛昌; 王仁焘; 欧希堂; 金忠超; 郝桃武; 王亮; 赵日东; 朱松
Original assignee: Dalian North Instrument Transformer Group Co Ltd
Current assignee: Shenyang High Voltage Complete Switchgear Co., Ltd.
Priority date: 2009-09-04
Filing date: 2009-09-04
Publication date: 2010-05-26
Anticipated expiration: 2019-09-04

Abstract

The utility model relates to a three-phase cable fuse voltage transformer, which is an integral structure formed by integrally pouring epoxy resin with an iron core, a primary winding, a secondary winding, primary binding posts and a secondary terminal box. The integral structure is integrally mounted on a base with mounting holes. The outside of the primary binding post is in a vertical cone frustum shape, and primary high-voltage fuses are respectively fixed and sealed into the primary binding posts. One end of each high-voltage fuse contacts with a compression spring inside an inner tube of each binding post while the other end is in threaded fixation with a bolt of each primary binding post. The three-phase cable fuse voltage transformer has the advantages of small volume, compact structure, reasonable layout, convenient installation, reliable insulation, fuse protection function and the like, simplifies problems of a switch cabinet, such as complex installation, complicated wiring, limited insulation space and the like to a large extent, and integrally increases the design fabrication level of the switch cabinet.

Description

Three facies tract fuse voltage transformers

Technical field

The utility model relates to electric power system high-tension measurement or relay protection device, specifically a kind of three facies tract fuse voltage transformers.

Background technology

Voltage transformer is a measuring voltage in electric power system or the electric control system; the equipment of electric energy; as the main electric elements in the switch cubicle; measure or electic protection in order to realize three-phase voltage; normally adopt two single-phase potential transformers to assemble; and then high-tension fuse is installed successively one time; parts such as insulating sleeve; in recent years along with the development of instrument transformer technology; the voltage transformer of single-phase zone fuse is succeeded in developing and is used; simplified the part installation procedure of switch cubicle to a certain extent; but still exist storage how cumbersome as installing; the wiring complexity; problems such as insulating space anxiety; so improve the designing and manufacturing level of switch cubicle for integral body; be starved of the voltage transformer of developing a kind of three facies tract fuses on the market, in the switch cubicle of directly packing into safely and reliably.

The utility model content

At above shortcomings part in the prior art, the technical problems to be solved in the utility model provides a kind of three facies tract fuse voltage transformers reliable, band fuse defencive function that insulate.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is:

It is integral structure that a kind of three facies tract fuse voltage transformers of the utility model adopt poured with epoxy resin by iron core, winding, secondary winding, primary connection post and a secondary connection box, integral installation is on a base that has an installing hole, primary connection post outside is vertical truncated cone shape, and inside is sealed with high-tension fuse respectively No. one time; Compression spring in one end of high-tension fuse and the binding post inner cylinder contacts, and the other end and primary connection terminal bolt screw thread are fixed.

Three primary connection posts are positioned at the integral structure upper surface, are isosceles triangle and arrange; Described integral structure is the cuboid form, and its top edge is the form that inclined downward intersects; Described integral structure bottom relative position is provided with S shape carrying handle; The secondary connection box is positioned at the monolithic construction middle part, and it goes out line position and is provided with the water-proof cable joint.

The utlity model has following beneficial effect and advantage:

1. little, the compact conformation of volume: three primary connection post inside are sealed with high-tension fuse respectively No. one time in the utility model, effectively utilized the space of instrument transformer, two solenoids are enclosed in the rectangular structure jointly admittedly, realized the function of threephase potential transformer, volume is littler, compact conformation can be installed in arbitrarily in the switch cubicle.

2. rationally distributed, easy for installation: the outside of three-phase terminal is vertical truncated cone shape and is the isosceles triangle layout, three alternate air line distances have been increased, connect and S shape carrying handle with the electric of a high voltage bus when conveniently using, make product in carrying, very convenient when reaching the use installation.

3. reliable, band fuse defencive function insulate: the utility model adopts built-in fuse structure mode and three-phase integrated structure, not only makes it have uniform dielectric, and makes its inside and outside high-low pressure Electric Field Distribution more reasonable; The utility model three-phase has possessed the high-tension fuse defencive function simultaneously No. one time, secondary water-proof cable joint protective the secondary connection box have good sealing effectiveness.

4. the utility model has been simplified cumbersome, the problems such as wiring is complicated, insulating space anxiety of switch cubicle installation to a great extent, and integral body has improved the designing and manufacturing level of switch cubicle.

Description of drawings

Fig. 1 is the utility model external structure front view;

Fig. 2 is the utility model vertical view;

Fig. 3 is the utility model internal structure schematic diagram.

Embodiment

Shown in Fig. 1～3, the utility model three facies tract fuse voltage transformers, adopting poured with epoxy resin by iron core 1, winding 2, secondary winding 3, primary connection post 4 and a secondary connection box 5 is integral structure, integral installation is on a base that has an installing hole, primary connection post 4 inside are sealed with high-tension fuse 7 respectively No. one time, its outside is vertical truncated cone shape, compression spring 12 in one end of high-tension fuse 7 and the binding post inner cylinder contact, and other end employing primary connection terminal bolt screw thread is fixed; Three primary connection posts 4 are positioned at the integral structure upper surface, are isosceles triangle and arrange; Described integral structure is the cuboid form, and its top edge is the form that inclined downward 8 intersects; Integral structure bottom relative position is provided with S shape carrying handle 9; Secondary connection box 5 is positioned at the monolithic construction middle part, and it goes out line position and is provided with water-proof cable joint 10.

Assembling process of the present utility model is as follows: the secondary winding 3 of threephase potential transformer and winding 2 are concentric to be sleeved on 1 post unshakable in one's determination after on the insulation framework, form voltage device body through insulation and buffering wrapping back, two voltage device status are not fixed in the casting mold with fixed support, and then being electrically connected of carrying out that three-phase terminal is correlated with, adjust the insulation distance of periphery, adopt the epoxide resin vacuum cast cured explosive to form the integral type full-closed structure, three primary connection post 4 inside become the inner vertical truncated cone shape that is for columnar resin tubular is outside respectively, and respectively as the space of consolidating front cover sub-high pressure fuse 7, compression spring 12 in one end of high-tension fuse 7 and the binding post inner cylinder connects, the other end of this compression spring 12 is electrically connected with a winding 2, this structure has effectively been utilized the space of instrument transformer, make three-phase possess the high-tension fuse defencive function simultaneously No. one time, and increased between three-phase primary connection post 4 terminals along the face creepage distance; Last integral installation is on a base 6 that has an installing hole; Three primary connection posts 4 are positioned at the integral structure upper surface, are isosceles triangle and arrange, have not only increased the air line distance of 4 on three-phase primary connection post on the position, and connect with the electric of a high voltage bus with realization when conveniently installing and using; Integral structure integral body is the cuboid form, and its top is that inclined-plane 8 intersects form along periphery; Guaranteed that not only inner three-phase coil periphery has uniform dielectric, and made product inside and outside high-low pressure Electric Field Distribution more reasonable; Has S shape carrying handle 9 in bottom, the monolithic construction left and right sides; have in carrying and when use installing and to control position secondary connection box 5 reliably and be positioned at the monolithic construction middle part; during secondary connection secondary go out line position have water-proof cable joint 10 not only the secondary cable of Convenient switch cabinet arrange, and the water-proof cable joint protective secondary connection box have good sealing effectiveness.

During use, pack into the primary connection post 4 and the envelope of instrument transformer of high-tension fuse put primary connection terminal 11, require to utilize mounting seat 6 that the solid word of instrument transformer is installed in the switch cubicle according to switch designs, carry out primary connection terminal 11 again and link to each other with the high pressure busbar of switch cubicle; Carry out the secondary connection of voltage transformer at last, secondary cable seals fastening by secondary water-proof cable joint 10, utilize secondary connection lid plate and seal gasket that the secondary terminal is sealed then; Convenient, flexible the finishing of three facies tract fuse voltage transformer installment works.

The utility model three facies tract fuse voltage transformers are a kind of new products that design according to national standard and switch cubicle specification requirement fully; employing rolls iron core; utilize the electromagnetic conversion principle; make secondary voltage can reflect the situation of change of primary voltage exactly, use as voltage measurement and relaying protection.

Claims

1. facies tract fuse voltage transformer, adopting poured with epoxy resin by iron core, winding, secondary winding, primary connection post and a secondary connection box is integral structure, integral installation is on a base that has an installing hole, it is characterized in that: primary connection post (4) is outside to be vertical truncated cone shape, and inside is sealed with a high-tension fuse (7) respectively; Compression spring (12) in one end of high-tension fuse (7) and the binding post inner cylinder contacts, and the other end and primary connection terminal (11) bolt thread are fixed.

2. by the described three facies tract fuse voltage transformers of claim 1, it is characterized in that: three primary connection posts (4) are positioned at the integral structure upper surface, are isosceles triangle and arrange.

3. by the described three facies tract fuse voltage transformers of claim 1, it is characterized in that: described integral structure is the cuboid form, and its top edge is the form that inclined downward (8) intersects.

4. by the described three facies tract fuse voltage transformers of claim 1, it is characterized in that: described integral structure bottom relative position is provided with S shape carrying handle (9).

5. by the described three facies tract fuse voltage transformers of claim 1, it is characterized in that: secondary connection box (5) is positioned at the monolithic construction middle part, and it goes out line position and is provided with water-proof cable joint (10).