CN105609238A - Convenient-to-install high-voltage zero-sequence current transformer - Google Patents
Convenient-to-install high-voltage zero-sequence current transformer Download PDFInfo
- Publication number
- CN105609238A CN105609238A CN201610093523.4A CN201610093523A CN105609238A CN 105609238 A CN105609238 A CN 105609238A CN 201610093523 A CN201610093523 A CN 201610093523A CN 105609238 A CN105609238 A CN 105609238A
- Authority
- CN
- China
- Prior art keywords
- tube
- base tube
- current transformer
- press
- sequence current
- 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- Withdrawn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
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- 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
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
Abstract
The invention discloses a convenient-to-install high-voltage zero-sequence current transformer, which comprises a base tube, a core tube, one set of press claw component, a flat nut and a current transformer body, wherein the current transformer body sleeves the base tube; three crimping bosses are arranged on the inner circumference wall of the base tube; three radial limiting slide holes are formed in the core tube; the press claw component comprises three press claws; each press claw comprises a press plate part and a drive thread part; each press plate part and corresponding one crimping boss are clamped to form a wire clamping hole; the press claw component and the three crimping bosses form three wire clamping holes; the flat nut is rotationally arranged in a tube cavity of the core tube and comprises a plane thread part which is meshed and matched with the drive thread parts of the press claws; and the flat nut drives various press plate parts to be close to one another or far away from one another towards the center of the base tube through the drive thread parts during reciprocating rotation. The convenient-to-install high-voltage zero-sequence current transformer has an excellent anti-looseness effect.
Description
Technical field
The invention belongs to power technology field, be specifically related to a kind of high pressure zero sequence current mutual inductor of being convenient to installation.
Background technology
The general principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): the telegram in reply that flows into arbitrary node in circuitThe algebraical sum of stream equals zero. In circuit and the normal situation of electrical equipment, the vector of each phase current equals zero, therefore, and zeroThe secondary side winding no signal output of order current transformer, executive component is failure to actuate. When occurring to get an electric shock or each when leak current faultThe vector of phase current is non-vanishing, and fault current makes to produce magnetic flux, zero sequence current mutual inductor in the iron core of zero sequence current mutual inductorThe electric current producing is zero-sequence current. When protection mechanism receives this zero sequence current signal, can take according to electrical leakage quantity correspondingProtection action.
Mostly the mounting means of existing zero sequence current mutual inductor is to adopt flange install fixing or adopt bonding mode to fix,Its installation site generally needs reserved, therefore make its application be subject to more restriction.
Summary of the invention
The object of this invention is to provide and be a kind ofly convenient to that location is installed, there is better firmly degree, effectively prevent from becoming flexible justIn the high pressure zero sequence current mutual inductor of installing.
The technical scheme that realizes the object of the invention is: a kind of high pressure zero sequence current mutual inductor of being convenient to installation, comprises oneBase tube, core pipe, a set of paw assembly, a plane nut and a current transformer; Current transformer is set in base tubeOn; The internal perisporium of base tube is provided with three crimping boss, and the tube wall of core pipe is provided with three radially spacing slide openings; Paw assembly comprisesThree paws, each paw comprises pressing plate portion and drives threaded portion; Each threaded portion that drives inwardly stretches to core from radially spacing slide openingIn the tube chamber of pipe, each pressing plate portion is positioned between base tube inwall and core tube wall; Each pressing plate portion and the clamping of a corresponding crimping bossForm a clamp hole, paw assembly and three crimping boss form three clamp holes altogether; Plane nut rotation is arranged on core pipeIn tube chamber; Plane nut comprises with each paw and drives threaded portion to engage adaptive flat thread portion; When plane nut reciprocating rotationBy drive threaded portion drive each pressing plate portion towards base tube center close to each other or away from.
The present invention has positive effect: (1) the present invention clamps electric power cable with the bolt assembly by traditional and compares, canTo apply larger pressure, and there is excellent anti-loosening effect, effectively ensure the reliability of long-term work. (2) the present inventionZero sequence current mutual inductor owing to carrying press claw type retaining mechanism, do not need reserved installation position, be easy to install, and have preferablyAnti-loosening effect, firmly intensity is higher and reliable and stable.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is a kind of perspective view when zero sequence current mutual inductor removes current transformer shown in Fig. 1;
A kind of perspective view of Fig. 3 when to be zero sequence current mutual inductor shown in Fig. 2 observe from another angle;
Fig. 4 is a kind of front view of zero sequence current mutual inductor shown in Fig. 2;
Fig. 5 is that the one of zero sequence current mutual inductor shown in Fig. 2 is partly cutd open structural representation;
Fig. 6 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 2;
A kind of explosive view when Fig. 7 is another angle observation of zero sequence current mutual inductor shape shown in Fig. 2;
Fig. 8 is the explosive view that zero sequence current mutual inductor shown in Fig. 7 further decomposes;
Fig. 9 is a kind of perspective view of the nut of zero sequence current mutual inductor midplane shown in Fig. 2.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of high pressure zero sequence current mutual inductor of being convenient to installation, sees shown in Fig. 1 to Fig. 9, comprises a basePipe 1, core pipe 2, a set of paw assembly 3, plane nut 4 and a current transformer 8;
The internal perisporium of base tube is axially arranged with three crimping boss 11 along base tube, and the inwall of each crimping boss is provided with deep-slotted chip breaker111; The internal perisporium of base tube is axially also provided with four positioning runners 12 along base tube; The periphery wall of core pipe is provided with four along base tube footpathTo protruding the support flange 21 extending, the outboard end that respectively supports flange is arranged in a corresponding positioning runner, thereby core pipe is propped upSupport is positioned in the tube chamber of base tube; Core pipe and base tube arrange with one heart and are positioned at base tube tube chamber; The tube wall of core pipe is provided with threeRadially spacing slide opening 22, each radially spacing slide opening all radially runs through core tube wall along base tube; Respectively radially spacing slide opening is positioned at coreTubular axis middle part upwards, each radially radial section shape of spacing hole is I-shaped; The internal perisporium of core pipe is provided with to projecting inwardThe annular gear platform 23 forming.
Paw assembly comprises three paws 5, and each paw comprises pressing plate portion 51, from the inwall of pressing plate portion to projecting inward formationGuide runner portion 52 and be arranged on the driving threaded portion 53 in guide runner portion; Pressing plate portion extends axially along base tube, guide runnerPortion radially extends along base tube; The outer wall of each paw pressing plate portion is provided with arc clip slot 511; Each guide runner insertion core Guan Shangxiang of portionAnswer in a radially spacing slide opening, respectively drive threaded portion to stretch in the tube chamber of core pipe, each pressing plate portion is positioned at base tube inwall and coreBetween pipe outer wall; Each paw is radially reciprocatingly sliding along base tube under the guide and limit effect of spacing slide opening radially; Each guiding is slidingThe radial section shape of piece portion is I-shaped with spacing hole adaptation radially.
In the present embodiment, the arc clip slot of each paw is the deep-slotted chip breaker setting to a corresponding crimping boss just, and this pawArc clip slot and the deep-slotted chip breaker clamping of this crimping boss form a clamp hole 6, each clamp hole is used for clamping a power lineCable; The present embodiment forms three clamp holes altogether, clamps altogether three electric power cables. Because three electric power cables are from matrix slip pipe tube chamberIn pass, current transformer can carry out zero-sequence current detection to three electric power cables by induction mode, for timely discoveryLeakage current fault, and send real time information to distance host by wireless transmit/receive units, for power circuit intellectuality providesBasic data. In the present embodiment, current transformer 8 is ring current transformer, and this ring current transformer is set in outside base tubeOn wall. In concrete practice, also can on the outer wall of base tube, detent be set, current transformer is arranged in this detent,Thereby make current transformer more firm.
In the present embodiment, the size in each clamp hole can be different, for clamping the electric power cable of different thicknesses.
Plane nut is arranged in core pipe tube chamber, and between the driving threaded portion and core pipe gear platform of each paw; PlaneNut comprises with each paw and drives threaded portion to engage adaptive flat thread portion 41 and be positioned at the fastening of plane nut centerPortion 42, plane nut arranges flat thread portion on a side of paw assembly, another side of plane nut and core pipe gearPlatform slip adjacency; The periphery wall of plane nut and core inside pipe wall slip adjacency; Flat thread portion is annular, in flat thread portion, establishesHave archimedean spiral groove, the driving threaded portion of each paw assembly is provided with and the thread groove of this archimedean spiral groove adaptation,Each side that drives threaded portion to be arranged on place guide runner portion 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 twists operationAdopt inner hexagon spanner; In concrete practice, described fastening part just can adopt other shape, for example square or in-line or plum blossomShape, all can select.
In concrete practice, the quantity of crimping boss and paw can be selected according to actual needs, for example two or threeDeng, be all feasible.
Plane nut, in reciprocating rotation, drives its flat thread portion reciprocating rotation, and then by engage adaptation with itDrive threaded portion to drive each paw, because each paw can only be along the footpath of base tube under the guide and limit effect of spacing slide opening radiallyTo moving back and forth, thus make the move mode of each paw be close to each other towards base tube center or away from, thereby unclamp or press from both sidesTightly be arranged in the electric power cable in clamp hole.
The present embodiment gravity centre distribution is comparatively reasonable, on for high-altitude overhead power line time, is conducive to alleviate vibration; SeparatelyOutward, the present embodiment drives paw to clamp electric power cable by flat thread portion, and clamps power line by traditional bolt assemblyCable is compared, particularly excellent in anti-loosening effect, effectively ensures the reliability of long-term work.
The present embodiment can be used as high pressure zero sequence current mutual inductor and uses, for detection of the existence of leakage current, with in timeFind leak current fault.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not rightThe restriction of embodiments of the present invention. For those of ordinary skill in the field, also can on the basis of the above descriptionTo make other changes in different forms. Here without also giving exhaustive to all embodiments. And theseBelong to apparent variation or the variation that connotation of the present invention extends out and still belong to protection scope of the present invention.
Claims (1)
1. be convenient to a high pressure zero sequence current mutual inductor of installing, it is characterized in that: comprise a base tube, a core pipe, a set ofPaw assembly, a plane nut and a current transformer; Current transformer is set on base tube; The internal perisporium of base tube is provided withThree crimping boss, the tube wall of core pipe is provided with three radially spacing slide openings; Paw assembly comprises three paws, and each paw comprisesPressing plate portion and driving threaded portion; Each threaded portion that drives inwardly stretches to the tube chamber of core pipe from radially spacing slide opening, each pressing plate portionBetween base tube inwall and core tube wall; Each pressing plate portion and a corresponding crimping boss clamping form a clamp hole, pawAssembly and three crimping boss form three clamp holes altogether; Plane nut rotation is arranged in core pipe tube chamber; Plane nut comprisesDrive threaded portion to engage adaptive flat thread portion with each paw; Each by driving threaded portion to drive when plane nut reciprocating rotationPressing plate portion towards base tube center close to each other or away from.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610093523.4A CN105609238A (en) | 2016-01-15 | 2016-01-15 | Convenient-to-install high-voltage zero-sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610093523.4A CN105609238A (en) | 2016-01-15 | 2016-01-15 | Convenient-to-install high-voltage zero-sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105609238A true CN105609238A (en) | 2016-05-25 |
Family
ID=55989087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610093523.4A Withdrawn CN105609238A (en) | 2016-01-15 | 2016-01-15 | Convenient-to-install high-voltage zero-sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105609238A (en) |
Citations (2)
| 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 |
-
2016
- 2016-01-15 CN CN201610093523.4A patent/CN105609238A/en not_active Withdrawn
Patent Citations (2)
| 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 |
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| 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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160525 |