CN105742019A - High-voltage and zero-sequence current transformer - Google Patents
High-voltage and zero-sequence current transformer Download PDFInfo
- Publication number
- CN105742019A CN105742019A CN201610095973.7A CN201610095973A CN105742019A CN 105742019 A CN105742019 A CN 105742019A CN 201610095973 A CN201610095973 A CN 201610095973A CN 105742019 A CN105742019 A CN 105742019A
- Authority
- CN
- China
- Prior art keywords
- core pipe
- crimp
- current transformer
- plate portion
- paw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/38—Instruments transformers for polyphase ac
Abstract
The invention discloses a high-voltage and zero-sequence current transformer, which comprises a core tube, one set of press claw components, a flat nut, a current transformer body and three crimping parts, wherein each crimping part is provided with a press plate part and an anti-drop connection part; the crimping parts are detachably arranged on the core tube through the anti-drop connection parts; the press plate parts are located at the outer side of the core tube; three radial limiting slide holes are formed in the tube wall of the core tube; the press claw components comprise three press claws; each press claw comprises a top plate part, a guide slide block part and a drive thread part; each guide slide block part is inserted into one corresponding radial limiting slide hole; the drive thread parts extend into a tube cavity of the core tube; the flat nut is rotationally arranged in the tube cavity of the core tube; each flat nut comprises a flat thread part; the current transformer body comprises an annular base body; the annular base body is located at the outer sides of the crimping parts; and the flat nut drives the press claws in the press claw components to be close to one another towards the center of the core tube or far away from one another. The high-voltage and zero-sequence current transformer has an excellent anti-looseness effect.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of high pressure zero sequence current mutual inductor.
Background technology
The ultimate principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): flow into the algebraical sum of telegram in reply stream of any node in circuit equal to zero.Under circuit with the normal situation of electrical equipment, the vector of each phase current is equal to zero, and therefore, the secondary side winding no signal output of zero sequence current mutual inductor, executive component is failure to actuate.When the vector of each phase current occurring to get an electric shock or during leak current fault is not zero, fault current makes to produce magnetic flux in the iron core of zero sequence current mutual inductor, and produced by zero sequence current mutual inductor, electric current is zero-sequence current.When protection mechanism receives this zero sequence current signal, corresponding protection act can be taked according to electrical leakage quantity.
Mostly the mounting means of existing zero sequence current mutual inductor is to adopt flange install fixing or adopt bonding mode to fix, and its installation site is it is generally required to reserve, therefore makes its application be subject to more restriction.
Summary of the invention
It is an object of the invention to provide and a kind of be easily installed location, there is better firmness, effectively prevent the high pressure zero sequence current mutual inductor that loosens.
The technical scheme realizing the object of the invention is: a kind of high pressure zero sequence current mutual inductor, including a core pipe, a set of paw assembly, a plane nut, a current transformer and three crimps；Each crimp is provided with pressing plate portion and anticreep connecting portion；Each crimp is arranged on core pipe by anticreep connecting portion is dismountable, and pressing plate portion is positioned at outside core pipe；The tube wall of core pipe is provided with three spacing slide openings of radial direction；Paw assembly includes three paws for forming three clamp holes with crimp combination；Each paw includes top plate portion, from the guide runner portion of the inwardly projecting formation of the inwall of top plate portion and the driving threaded portion that is arranged on guide runner portion；Top plate portion is positioned at outside core pipe, and the pressing plate portion clamping of top plate portion and a corresponding crimp forms a clamp hole for clamping electric power cable；Guide runner portion inserts on core pipe in a corresponding spacing slide opening of radial direction, drives threaded portion to stretch in the tube chamber of core pipe；Plane nut rotation is arranged in core pipe tube chamber；Plane nut includes driving threaded portion to engage the flat thread portion of adaptation with paw；Current transformer includes annular matrix, and annular matrix is positioned at the outside of crimp；Plane nut drives its flat thread portion reciprocating rotation, so the paw in driving pressure claw assembly towards core tube hub closer or far from, thus unclamping or clamping the electric power cable being arranged in clamp hole.
In technique scheme, current transformer also includes intelligent control module, and intelligent control module can include wireless transmit/receive units, and intelligent control module sends distance host by wireless transmit/receive units to this secondary current information.
In technique scheme, annular matrix and core pipe are arranged concentrically, and annular matrix is positioned at the outside of crimp；Intelligent control module is arranged on and is enclosed in the region formed by annular matrix inwall, core tube wall and crimp outer wall.
The present invention has positive effect: (1) present invention compares with by traditional bolt assembly clamping electric power cable, it is possible to applies bigger pressure, and has excellent anti-loosening effect, is effectively ensured the reliability of long-term work.(2) zero sequence current mutual inductor of the present invention is owing to carrying press claw type retaining mechanism, it is not necessary to reserved installation position, it is easy to installing, and have good anti-loosening effect, firm intensity is relatively high and stable reliably.
Accompanying drawing explanation
Fig. 1 is a kind of perspective view of the present invention；
Fig. 2 be zero sequence current mutual inductor shown in Fig. 1 from another angle observe time a kind of perspective view；
Fig. 3 is a kind of front view of zero sequence current mutual inductor shown in Fig. 1；
Fig. 4 is that shown in Fig. 1, the one of zero sequence current mutual inductor partly cuts open structural representation；
Fig. 5 is a kind of perspective view when removing current transformer of the zero sequence current mutual inductor shown in Fig. 1；
Fig. 6 be part zero sequence current mutual inductor shown in Fig. 5 from another angle observe time a kind of perspective view；
Fig. 7 is a kind of front view of part zero sequence current mutual inductor shown in Fig. 5；
Fig. 8 is that shown in Fig. 5, the one of part zero sequence current mutual inductor partly cuts open structural representation；
Fig. 9 is a kind of explosive view of part zero sequence current mutual inductor shown in Fig. 5；
Figure 10 be part zero sequence current mutual inductor shown in Fig. 5 from another angle observe time a kind of explosive view.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of power circuit connecting clip, sees shown in Fig. 1 to Fig. 6, including a core pipe 2, a set of paw assembly 4, current transformer 8 of 3, plane nut and three crimps 1.
The tube wall of core pipe is provided with three spacing slide openings 22 of radial direction, and each radially spacing slide opening all extends radially through core tube wall along core pipe；Each radially spacing slide opening is positioned at core pipe middle part axially, and the radial cross-sectional shape of each radially spacing hole is I-shaped；The internal perisporium of core pipe is provided with the annular gear platform 23 of inwardly projecting formation.
Each crimp is provided with pressing plate portion 11 and anticreep connecting portion 12；Crimp is arranged on core pipe by anticreep connecting portion is dismountable；Pressing plate portion 11 is axially extending along core pipe, and the inwall in pressing plate portion is provided with arcuate groove 13, and the periphery wall in pressing plate portion is circular arc；Anticreep connecting portion is two the post plates protruding inwardly from formation from pressing plate portion two side ends, and the radial cross-sectional shape of each post plate is L-shaped；In the present embodiment, two L-shaped post plates are oppositely arranged；
The periphery wall of core pipe is provided with three anticreep chutes 24 for installing location crimp vertically；Each anticreep chute includes the mounting groove 241 that two radial sections are L-shaped；In the present embodiment, two adjacent anticreep chutes are oppositely arranged；Each mounting groove and a corresponding post plate are adaptive；The anticreep connecting portion of each crimp slips into a corresponding anticreep chute along core pipe axial direction from a side of anticreep chute；In concrete practice, anticreep connecting portion can select other shape, as long as making the anticreep connecting portion of crimp can not remove along core caliber to from anticreep chute；In concrete practice, it is possible to select the mode of clamping that fixing crimp is installed；Three draw-in grooves are such as set on the periphery wall of core pipe, each pressing plate arranges the clamping support column or clamping gripper shoe that protrude inwardly from, each clamping support column or clamping gripper shoe are directly snapped in a corresponding draw-in groove, also preventing shackle member from removing core pipe along core pipe radial direction, this structure is also feasible.
The inwall of a corresponding crimp is just arranged by each radially spacing slide opening.
Paw assembly includes three paws 5 for forming clamp hole with crimp combination；Each paw includes top plate portion 51, from the guide runner portion 52 of the inwardly projecting formation of the inwall of top plate portion and the driving threaded portion 53 that is arranged on guide runner portion；Top plate portion is axially extending along core pipe, and guide runner portion radially extends along core pipe；The outer wall of each paw top plate portion is provided with arc clip slot 511；Each paw top plate portion is positioned at outside core pipe, and just the pressing plate portion of a corresponding crimp is arranged；Each guide runner portion inserts on core pipe in a corresponding spacing slide opening of radial direction, in each tube chamber driving threaded portion to stretch to core pipe；Each paw reciprocatingly slides along the radial direction of core pipe under the guide and limit effect of radially spacing slide opening；The radial cross-sectional shape in each guide runner portion is adaptive with radial direction spacing hole I-shaped.
The arcuate groove in a corresponding crimp pressing plate portion is just arranged by the arc clip slot of each paw top plate portion, and this arc clip slot and this arcuate groove clamping form a clamp hole 6, and each clamp hole is used for clamping an electric power cable.The present embodiment forms three clamp holes altogether, is used for clamping three electric power cables.In concrete practice, the size of each crimp can be different, for instance the distance between arcuate groove and the core tube wall in each pressing plate portion is different, such that it is able to form the clamp hole varied in size, for clamping the cable of different thicknesses.
Plane nut is arranged in core pipe tube chamber, and keeps off between platform in the driving threaded portion of each paw and core pipe；Plane nut includes driving threaded portion engage the flat thread portion 41 of adaptation and be positioned at the fastening part 42 of plane nut center with each paw, arranging flat thread portion on one side of the adjacent paw assembly of plane nut, another side of plane nut and core pipe gear platform slide adjacent；The periphery wall of plane nut and core inside pipe wall slide adjacent；Flat thread portion is annular, and flat thread portion is provided with archimedean spiral groove, the thread groove that driving threaded portion is provided with and this archimedean spiral groove is adaptive of paw assembly, each side driving threaded portion to be arranged on guide runner portion, place adjacent flat nut.
The fastening part of the present embodiment midplane nut is interior hexagonal shape fastener hole or interior hexagonal shape binding groove, and it is twisted operation and adopts inner hexagon spanner；In concrete practice, described fastening part just can adopt other shape, for instance square or in-line or quincunx, all can select.
Current transformer 8 includes annular matrix 81 and intelligent control module 82, intelligent control module can include wireless transmit/receive units, when three electric power cables have leakage current, annular matrix will induce secondary current, and intelligent control module sends distance host by wireless transmit/receive units to this secondary current information；Annular matrix and core pipe are arranged concentrically, and annular matrix is positioned at the outside of crimp；Intelligent control module is arranged on and is enclosed in the region formed by annular matrix inwall, core tube wall and crimp outer wall, thus making full use of space, is conducive to the small-sized and integrated of entirety.
Plane nut is in reciprocating rotation, drive its flat thread portion reciprocating rotation, and then drive each paw by engaging the driving threaded portion of adaptation, owing to each paw radial direction only along core pipe under the guide and limit effect of radially spacing slide opening moves back and forth, so that the move mode of each paw be close to each other towards core tube hub or away from, thus unclamping or clamping the electric power cable being arranged in each clamp hole.
When the present embodiment is on the overhead power line of high-altitude, be conducive to alleviating vibration；It addition, the present embodiment drives paw clamping electric power cable by flat thread portion, compare with by traditional bolt assembly clamping electric power cable, particularly excellent in anti-loosening effect, it is effectively ensured the reliability of long-term work.The present embodiment is be arranged on core pipe by sliding or crimping mode due to crimp, it is possible to first cable is placed in the arc clip slot of each paw, more corresponding crimp is loaded in corresponding anticreep chute, corresponding electric power cable can be placed in clamp hole；This structure makes the easy to operation of clamping electric power cable.
The present embodiment entirety can use as high pressure zero sequence current mutual inductor, for detecting the existence of leakage current, finds leak current fault in time.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And the apparent change that these connotations belonging to the present invention are extended out or variation still fall within protection scope of the present invention.
Claims (3)
1. a high pressure zero sequence current mutual inductor, it is characterised in that: include a core pipe, a set of paw assembly, a plane nut, a current transformer and three crimps；Each crimp is provided with pressing plate portion and anticreep connecting portion；Each crimp is arranged on core pipe by anticreep connecting portion is dismountable, and pressing plate portion is positioned at outside core pipe；The tube wall of core pipe is provided with three spacing slide openings of radial direction；Paw assembly includes three paws for forming three clamp holes with crimp combination；Each paw includes top plate portion, from the guide runner portion of the inwardly projecting formation of the inwall of top plate portion and the driving threaded portion that is arranged on guide runner portion；Top plate portion is positioned at outside core pipe, and the pressing plate portion clamping of top plate portion and a corresponding crimp forms a clamp hole for clamping electric power cable；Guide runner portion inserts on core pipe in a corresponding spacing slide opening of radial direction, drives threaded portion to stretch in the tube chamber of core pipe；Plane nut rotation is arranged in core pipe tube chamber；Plane nut includes driving threaded portion to engage the flat thread portion of adaptation with paw；Current transformer includes annular matrix, and annular matrix is positioned at the outside of crimp；Plane nut drives its flat thread portion reciprocating rotation, so the paw in driving pressure claw assembly towards core tube hub closer or far from, thus unclamping or clamping the electric power cable being arranged in clamp hole.
2. overhead transmission line connecting clip according to claim 1, it is characterized in that: current transformer also includes intelligent control module, intelligent control module can include wireless transmit/receive units, and intelligent control module sends distance host by wireless transmit/receive units to this secondary current information.
3. overhead transmission line connecting clip according to claim 1, it is characterised in that: annular matrix and core pipe are arranged concentrically, and annular matrix is positioned at the outside of crimp；Intelligent control module is arranged on and is enclosed in the region formed by annular matrix inwall, core tube wall and crimp outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095973.7A CN105742019A (en) | 2016-01-15 | 2016-01-15 | High-voltage and zero-sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095973.7A CN105742019A (en) | 2016-01-15 | 2016-01-15 | High-voltage and zero-sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105742019A true CN105742019A (en) | 2016-07-06 |
Family
ID=56246149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610095973.7A Withdrawn CN105742019A (en) | 2016-01-15 | 2016-01-15 | High-voltage and zero-sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105742019A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202917711U (en) * | 2012-11-13 | 2013-05-01 | 北京振兴计量测试研究所 | Fastening fixture for tail cover of electric connector |
| CN203679326U (en) * | 2014-01-24 | 2014-07-02 | 华南理工大学 | Novel flexible four-jaw chuck |
| CN204276947U (en) * | 2014-12-01 | 2015-04-22 | 温岭市深澳机床厂(普通合伙) | Scroll chuck |
-
2016
- 2016-01-15 CN CN201610095973.7A patent/CN105742019A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202917711U (en) * | 2012-11-13 | 2013-05-01 | 北京振兴计量测试研究所 | Fastening fixture for tail cover of electric connector |
| CN203679326U (en) * | 2014-01-24 | 2014-07-02 | 华南理工大学 | Novel flexible four-jaw chuck |
| CN204276947U (en) * | 2014-12-01 | 2015-04-22 | 温岭市深澳机床厂(普通合伙) | Scroll chuck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160706 |
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| WW01 | Invention patent application withdrawn after publication |