CN209282016U - Double winding open-close type zero sequence current mutual inductor - Google Patents
Double winding open-close type zero sequence current mutual inductor Download PDFInfo
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- CN209282016U CN209282016U CN201920107614.8U CN201920107614U CN209282016U CN 209282016 U CN209282016 U CN 209282016U CN 201920107614 U CN201920107614 U CN 201920107614U CN 209282016 U CN209282016 U CN 209282016U
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Abstract
The utility model relates to electric system high pressure protector, specifically a kind of double winding open-close type zero sequence current mutual inductor.Including upper half circle, lower half circle and bottom plate, upper half circle and lower half circle form cirque structure after being bolted, and center is a bus mouth, lower half circle is set on bottom plate, upper half circle includes upper insulator and two upper cores being sealed and placed in upper insulator, lower half circle includes lower insulator, two lower cores being sealed and placed in lower insulator and two groups of secondary windings being wound on two lower cores respectively, and the secondary wiring terminals of two groups of secondary windings are drawn by the bottom of lower insulator.The utility model is small in size, light-weight, and installing and dismounting is simple, easy to maintain, has the characteristics that long service life.
Description
Technical field
The utility model relates to electric system high pressure protector, specifically a kind of double winding open-close type zero sequence current
Mutual inductor.
Background technique
As China's electricity consumption grows at top speed, 10kV and following substation's capacity-increasing transformation and newly-built, the matched electricity
Current transformer is also by large quantities of uses.
Matched current transformer is that form of bus bars is set in primary insulation Exterior cable, realizes that current measurement uses, because
It is that bus-type cannot open and close for product structure, product installation and maintenance need to remove a cable when changeing and could install；Product exists
It is relatively difficult, cumbersome when site operation installation, disassembly, it is to be easy to happen stealing hidden danger point at secondary connection cable, in line with product
Intensive and anti-electricity-theft etc. to require, product structure form needs further to improve improvement.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of double winding open-close type zero sequence current mutual inductor,
To solve the inconvenient indoor bus-type current transformer installation of existing electric system, maintenance and installation challenge.
To achieve the goals above, the utility model uses following technical scheme:
A kind of double winding open-close type zero sequence current mutual inductor, including upper half circle, lower half circle and bottom plate, the upper semi-circle
Body and lower half circle form cirque structure after being bolted, and center is a bus mouth, the lower half circle setting
In on the bottom plate, the upper half circle includes upper insulator and two upper cores being sealed and placed in the upper insulator, described
Lower half circle includes lower insulator, two lower cores being sealed and placed in the lower insulator and is wound in two lower iron respectively
Two groups of secondary windings on core, two lower cores dock to form two annular cores respectively with the both ends of two upper cores, and two groups
The secondary wiring terminals of the secondary winding are drawn by the bottom of the lower insulator.
The bottom of the lower half circle is equipped with the secondary terminal box being located at below a bus mouth, the secondary wiring terminals
It is placed in the secondary terminal box.
The lower end side of the lower half circle is equipped with earth stud.
The two sides of the upper insulator are equipped with upper connecting ear seat, and the two sides of the lower insulator are equipped with lower connecting ear seat, and two
A upper connecting ear seat is bolted with corresponding lower connecting ear seat by described.
The secondary winding bracket of secondary winding described in being used to support two groups is equipped in the lower insulator.
The outside of secondary winding described in two upper cores and two groups, which is wrapped up, insulating layer.
The upper insulator is an integral structure using epoxy resin and two upper core casting；The lower insulator
It is an integral structure using epoxy resin and two lower cores and two groups of secondary winding casting.
The advantages of the utility model and beneficial effect are:
1. the utility model is poured using epoxide resin vacuum, there is insulation stabilization, impact resisting vibrating, maintenance period
It is long, quick for installation, convenient disassembly, small in size, light-weight, it is easy to maintain the advantages that, can be easily installed in 10kV and following electric power
In the transformation of system switching cabinet and new design switchgear.
2. the utility model insulating materials uses high temperature resistant, the full pouring type of ageing-resistant, dust-proof epoxy resin, having makes
With the feature that the service life is long.
3. the retractable structure and cable of the utility model are in one, firm reliable.
4. the utility model has anti-shifting structure measure: product is directly sleeved on cable, in product two ends when installation
Cable on cover dedicated Anti-moving wire ferrule, when guaranteeing cable perpendicular to ground, mutual inductor is also unlikely to the play on cable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the schematic diagram of internal structure of the utility model；
Fig. 4 is the left view of Fig. 3.
In figure: 1 is upper core, and 2 be secondary winding, and 3 be secondary terminal box, and 4 be bottom plate, and 5 be bolt, and 6 be nut, and 7 are
Upper insulator, 8 be lower insulator, and 9 be a bus mouth, and 10 be secondary wiring terminals, and 11 be mounting hole, and 12 be earth stud,
13 be secondary winding bracket, and 14 be lower core, and 15 be upper half circle, and 16 be lower half circle.
Specific embodiment
In order to keep the purpose of this utility model, technical solution and advantage clearer, with reference to the accompanying drawing and it is embodied
The utility model is described in detail in example.
As shown in Figs 1-4, a kind of double winding open-close type zero sequence current mutual inductor provided by the utility model, including upper semi-circle
Body 15, lower half circle 16 and bottom plate 4, upper half circle 15 and lower half circle 16 form cirque structure after connecting by bolt 5, and
Center is a bus mouth 9, and lower half circle 16 is set on bottom plate 4, and upper half circle 15 includes upper insulator 7 and is sealed and placed in absolutely
Two upper cores 1 in edge body 7, lower half circle 16 include lower insulator 8, two lower cores 14 being sealed and placed in lower insulator 8
And it is wound in two groups of secondary windings 2 on two lower cores 14 respectively, two lower cores 14 both ends with two upper cores 1 respectively
Docking forms two annular cores, and the secondary wiring terminals 10 of two groups of secondary windings 2 are drawn by the bottom of lower insulator 8.
The bottom of lower half circle 16 is equipped with the secondary terminal box 3 for being located at 9 lower section of a bus mouth, and secondary wiring terminals 10 hold
It is placed in secondary terminal box 3, secondary terminal box 3 is for dust-proof, anti-electricity-theft.Bus mouth 9 is exhausted as a high voltage bus
The transition of edge cable uses；The lower end side of lower half circle 16 is equipped with earth stud 12.
The two sides of upper insulator 7 are equipped with upper connecting ear seat, and the two sides of lower insulator 8 are equipped with lower connecting ear seat, connect on two
Lug seat is connected with corresponding lower connecting ear seat by bolt 5.It is equipped in lower insulator 8 and is used to support two groups of secondary windings 2
Secondary winding bracket 13.
The outside of two upper cores 1 and two groups of secondary windings 2, which is wrapped up, insulating layer.Upper insulator 7 uses epoxy resin
It is an integral structure with two casting of upper core 1；Lower insulator 8 using epoxy resin and two lower cores 14 and two groups it is secondary around
2 casting of group is an integral structure.The mounting hole 11 for having product to install and use is designed on bottom plate 4, is fixed convenient for the installation of product.
The manufacturing process of the utility model is:
Secondary winding 2 is equably wound on the lower half of the iron core of circular ring type, is bundled using secondary winding bracket 13
And after buffering wrapping, form the coil body with secondary wiring terminals 10, secondary winding 2；Secondary winding 2 utilizes secondary winding
Bracket 13 is fixed on mold, is solidified after adjusting distance with epoxide resin vacuum casting, become has secondary connection end therewith
Son 10, main body are a horizontal positioned drum type brake shape, and cylinder bore circular through hole is the integral structure of a bus mouth 9,
Integral structure is cut into upper half circle 15 and lower half circle 16 with position of center line using special cutting device, utilizes spiral shell
Bolt 5 and nut 6 etc. carry out the assembling of upper half circle 15 and lower half circle 16, and bottom plate 4 is fixed by bolts in lower half circle 16
Bottom surface, after secondary terminal box 3 is fixed on lower half circle 16；Earth stud 12 is connected on 8 left side of lower insulator.
Bus mouth 9 is excessively ferry of the actual installation using Shi Yici high voltage bus cable.
Then actual installation carries out the installation of mutual inductor in use, a high voltage bus cable installs in advance, when installation is first
Lower insulator 8 is fixedly installed in mutual inductor design position, so that a bus cable is put into a bus mouth 9 of opening and closing place, so
Upper insulator 7 is fixed with lower insulator 8 afterwards and is combined, that is, completes the electrical of high-tension line and mechanical connection；Then again
Into the electrical of secondary cable line and mechanical connection, secondary terminal box is finally installed, that is, completes installation.
Double winding open-close type zero sequence current mutual inductor provided by the utility model is one fully according to national standard design
Kind new product, rolls iron core using ring-like, using electromagnetic conversion principle, secondary current is enable accurately to reflect protection primary current
Situation of change, be transferred to secondary control or protective device, product made to be directly mounted at 10kV and following power system switch cabinet
In transformation and new design switchgear, used as relay protection.
The utility model is ideal 10kV and to make the excessively electric of threephase cable ground fault in indoor exchange 50Hz route
Stream protection uses.Project Product accuracy class is high, and mutual inductor can be dismantled dimidiation by when installation, is combined into again after installing cable
One, firm reliable, the easy for installation and installation that can not have a power failure.Mutual inductor is open type structure, guarantees the letter of product installing and dismounting
It is single, it is easy to maintain, and guarantee that play, product are not sleeved on cable directly product on cable, in product two ends when installation
Dedicated Anti-moving wire ferrule is covered on cable, when guaranteeing cable perpendicular to ground, mutual inductor is also unlikely to the play on cable.This is practical
It is novel to be poured using epoxide resin vacuum, specially treated is carried out in iron core incision after iron core notch, prevents iron core from getting rusty.Product
It is casting insulated using epoxide resin vacuum, there is resistance to temperature, ageing-resistant, dust-proof impact and good corrosion resistance, it is small in size,
It is anti-electricity-theft, it can be widely used in 10kV and the transformation of following power system switch cabinet and new design switchgear.
The foregoing is merely the embodiments of the present invention, are not intended to limit the protection scope of the utility model.It is all
Any modification, equivalent substitution and improvement made within spirit of the present utility model and principle, extension etc., are all contained in this reality
With in novel protection scope.
Claims (7)
1. a kind of double winding open-close type zero sequence current mutual inductor, which is characterized in that including upper half circle (15), lower half circle (16)
And bottom plate (4), the upper half circle (15) and lower half circle (16) form cirque structure after connecting by bolt (5), and in
The heart is a bus mouth (9), and the lower half circle (16) is set on the bottom plate (4), and the upper half circle (15) includes upper
Insulator (7) and two upper cores (1) being sealed and placed in the upper insulator (7), the lower half circle (16) includes lower insulation
It body (8), two lower cores (14) being sealed and placed in the lower insulator (8) and is wound on two lower cores (14) respectively
Two groups of secondary windings (2), two lower cores (14) dock to form two annular iron respectively with the both ends of two upper cores (1)
The secondary wiring terminals (10) of core, secondary winding described in two groups (2) are drawn by the bottom of the lower insulator (8).
2. double winding open-close type zero sequence current mutual inductor according to claim 1, which is characterized in that the lower half circle
(16) bottom is equipped with the secondary terminal box (3) being located at below a bus mouth (9), and the secondary wiring terminals (10) are placed in
In the secondary terminal box (3).
3. double winding open-close type zero sequence current mutual inductor according to claim 1, which is characterized in that the lower half circle
(16) lower end side is equipped with earth stud (12).
4. double winding open-close type zero sequence current mutual inductor according to claim 1, which is characterized in that the upper insulator
(7) two sides are equipped with upper connecting ear seat, and the two sides of the lower insulator (8) are equipped with lower connecting ear seat, two upper connecting ears
Seat is connected with corresponding lower connecting ear seat by the bolt (5).
5. double winding open-close type zero sequence current mutual inductor according to claim 1, which is characterized in that the lower insulator
(8) the secondary winding bracket (13) of secondary winding (2) described in being used to support two groups is equipped in.
6. double winding open-close type zero sequence current mutual inductor according to claim 1, which is characterized in that two upper cores
(1) and the outside of secondary winding described in two groups (2) is wrapped up insulating layer.
7. double winding open-close type zero sequence current mutual inductor according to claim 6, which is characterized in that the upper insulator
(7) it is an integral structure using epoxy resin and two upper core (1) casting；The lower insulator (8) uses asphalt mixtures modified by epoxy resin
Rouge is an integral structure with two lower cores (14) and two groups of secondary winding (2) casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920107614.8U CN209282016U (en) | 2019-01-23 | 2019-01-23 | Double winding open-close type zero sequence current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920107614.8U CN209282016U (en) | 2019-01-23 | 2019-01-23 | Double winding open-close type zero sequence current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209282016U true CN209282016U (en) | 2019-08-20 |
Family
ID=67605844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920107614.8U Active CN209282016U (en) | 2019-01-23 | 2019-01-23 | Double winding open-close type zero sequence current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209282016U (en) |
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2019
- 2019-01-23 CN CN201920107614.8U patent/CN209282016U/en active Active
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