CN105609242A - Novel zero sequence current transformer - Google Patents
Novel zero sequence current transformer Download PDFInfo
- Publication number
- CN105609242A CN105609242A CN201610096260.2A CN201610096260A CN105609242A CN 105609242 A CN105609242 A CN 105609242A CN 201610096260 A CN201610096260 A CN 201610096260A CN 105609242 A CN105609242 A CN 105609242A
- Authority
- CN
- China
- Prior art keywords
- clamp
- stem
- bolt
- current transformer
- hole
- 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.)
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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 novel zero sequence current transformer. The novel zero sequence current transformer comprises a base tube, a core column, a bolt, a current transformer and a clamping plate assembly, wherein the base tube comprises a press tube part and a sealing plate part, the sealing plate part and the press tube part are fixedly arranged relative to each other, the sealing plate part is provided with a limiting sliding hole and a threading hole, at least three crimping bosses are arranged on the inner wall of the press tube part, the core column is of a conical shape and is provided with a press sliding groove and a conical crimping surface, a central screw hold is formed at the center of the core column along the axial direction of the press tube part, the clamping plate assembly comprises at least three clamping plates, each clamping plate is arranged just opposite to one of the crimping bosses, the bolt comprises a rod body, a fastening part and an external thread connection part, the fastening part of the bolt is arranged outside the sealing plate part, the rod body of the bolt passes through the limiting sliding hole and is arranged in the central screw hole of the core column, the current transformer comprises an annular sensing body, each clamping hole is formed in a hole cavity of the annular sensing body, and the bolt is rotated to drive the core column so as to push each clamping plate to outwards move towards the radial direction of the press tube part. The novel zero sequence current transformer is compact in structure and has excellent performance.
Description
Technical field
The invention belongs to power technology field, be specifically related to a kind of novel zero-sequence current transformer.
Background technology
The general principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): the telegram in reply stream that flows into arbitrary node in circuitAlgebraical sum equal zero. In circuit and the normal situation of electrical equipment, the vector of each phase current equals zero, therefore,The secondary side winding no signal output of zero sequence current mutual inductor, executive component is failure to actuate. In the time there is electric shock or leak current faultThe vector of each phase current non-vanishing, fault current makes to produce magnetic flux, zero-sequence current in the iron core of zero sequence current mutual inductorThe electric current that transformer produces is zero-sequence current. When protection mechanism receives this zero sequence current signal, can be according to electrical leakage quantityTake corresponding protection action.
Mostly the mounting means of existing zero sequence current mutual inductor is to adopt flange install fixing or adopt bonding mode to fix, itsInstallation site generally needs reserved, therefore make the application of zero sequence current mutual inductor be subject to more restriction.
Summary of the invention
The object of this invention is to provide a kind of novel zero-sequence current mutual inductance of locating, thering is better firm degree of being convenient to installDevice.
The technical scheme that realizes the object of the invention is: a kind of novel zero-sequence current transformer, comprise base tube, stem stem, bolt,Current transformer and cleat assembly; Base tube comprises pressure pipe portion and shrouding portion; Shrouding portion is relative with pressure pipe portion to be fixedly installed; EnvelopeBoard is provided with spacing slide opening and through wires hole; The inwall of pressure pipe portion is provided with at least three crimping boss; Stem stem be shaped as conePlatform shape, is axially arranged with at least three jacking sliding grooves and as each jacking sliding bottom land wall along pressure pipe portion on the periphery wall of stem stemTaper electrolysis; The center of stem stem is axially arranged with center screw along pressure pipe portion; Cleat assembly comprises at least three clamps;The inwall of each clamp is provided with the guiding slide unit with jacking sliding groove adaptation; Each clamp is provided with guide chute; Each crimping is protrudingThereby platform be provided with by with the spacing traveller of the adaptive spacing clamp moving direction of guide chute; Clamp is just to corresponding oneIndividual crimping boss arranges; Each through wires hole in shrouding portion and a corresponding clamp hole are communicated with; Bolt comprises the body of rod, is arranged onThe fastening part of body of rod one end and be arranged on the external screw thread connecting portion on body of rod periphery wall; The fastening position of bolt is outside shrouding portionSide, the body of rod of bolt makes external screw thread connecting portion in the center screw of stem stem through the spacing slide opening of shrouding portion; BoltThe external diameter of fastening part is greater than the spacing slide opening of shrouding portion; Current transformer comprises toroidal inductive body; Each clamp hole is all positioned atIn the vestibule of toroidal inductive body; The inwall of crimping boss is provided with deep-slotted chip breaker; The outer wall of clamp is provided with arc clip slot,Each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole; In each arc clip slot and deep-slotted chip breaker, be provided with multiple wearingThorn; In each arc clip slot and deep-slotted chip breaker, be provided with multiple installation draw-in grooves, respectively install and in draw-in groove, be embedded with a puncture blade; RespectivelyThe sheet that punctures comprises installation portion and thorn blade, and installation portion is inlaid in to be installed in draw-in groove, and thorn blade exposes the formation of installing card groove and wearsThorn; Swivel bolt pulls stem stem to move towards the direction that approaches shrouding portion; Stem stem is by the taper crimping in each jacking sliding grooveFace pushes the guiding slide unit of each clamp, and then promotes each clamp and make it along radially outward the moving of pressure pipe portion, thus folderTightly be arranged in the electric power cable in clamp hole.
The present invention has positive effect: (1) zero sequence current mutual inductor of the present invention is owing to carrying press claw type retaining mechanism,Do not need reserved installation position, be easy to install. (2) comparatively compact and reasonable of structure; Stem stem is connected threadably with bolt,And making it clamp electric power cable by the each clamp of taper electrolysis crimping of jacking sliding groove, its operation is comparatively laborsaving. (3)Engaging lock at anticreep chisel teeth and anticreep tooth is fixed, and also has good anti-loosening effect.
Brief description of the drawings
Fig. 1 is that one of the present invention is partly cutd open structural representation;
Fig. 2 is that zero sequence current mutual inductor shown in Fig. 1 removes a kind of perspective view after current transformer;
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 that the one of zero sequence current mutual inductor shown in Fig. 2 is faced structural representation;
Fig. 5 is the A-A cutaway view of Fig. 4;
Fig. 6 is a kind of perspective view of base tube in zero sequence current mutual inductor shown in Fig. 2;
Fig. 7 is that the one of base tube shown in Fig. 6 is partly cutd open structural representation;
Fig. 8 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 2;
A kind of explosive view of Fig. 9 when to be zero sequence current mutual inductor shown in Fig. 2 observe from another angle.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of novel zero-sequence current transformer, sees shown in Fig. 1 to Fig. 9, comprise base tube 1, stem stem 2,Bolt 3, current transformer 7 and cleat assembly 4; Described base tube 1, stem stem 2 and cleat assembly 4 all adopt insulating materialsMake.
Base tube 1 comprises pressure pipe portion 11 and is positioned at the shrouding portion 12 of pressure pipe portion one end; The shape of pressure pipe portion is circular, pressure pipeThe inwall of portion is provided with crimping boss 13, and the inwall of crimping boss is provided with deep-slotted chip breaker 14. Base tube is made into integration, crimpingBoss from the inwall of pressure pipe portion radially to projecting inward formation, crimping boss along pressure pipe portion axially run through pressure pipe portion inWall.
In the present embodiment, pressure pipe portion is provided with four crimping boss, and these four crimping boss circumferentially evenly divide along pressure pipe portionCloth is on the inwall of pressure pipe portion.
The two side of each crimping boss is provided with two spacing travellers 15 that protrude towards pressure pipe portion center, and spacing traveller is along pressureThe radially setting of pipe portion.
Shrouding portion 12 is provided with through wires hole 16 and spacing slide opening 17; In the present embodiment, shrouding portion is provided with a spacing slide openingWith four through wires holes; Spacing slide opening is arranged on the center of shrouding portion, and through wires hole is evenly arranged on the outer circumferential side of spacing hole.
Stem stem be shaped as frustum, on the periphery wall of stem stem, be axially arranged with four jacking sliding grooves 21 along pressure pipe portion, press on each topIn chute, be also provided with multiple anticreep chisel teeths 22; The center of stem stem is axially arranged with center screw 23 along pressure pipe portion. Each topPress the diapire of chute as taper electrolysis 211.
Cleat assembly comprises four clamps 41; The inwall of each clamp is provided with the guiding slide unit 411 with jacking sliding groove adaptation,Guiding slide unit is along the axial setting of pressure pipe portion; The outer wall of each clamp is provided with arc clip slot 412, the both sides of each clampOn wall, be also provided with guide chute 413; The spacing traveller of each crimping boss is arranged in a corresponding guide chute, makes clampPlate moves along spacing traveller direction; In the present embodiment, each spacing traveller is along the radially setting of pressure pipe portion, therefore clamp can onlyAlong radially moving back and forth of pressure pipe portion.
In the present embodiment, the axial two ends on the two side of each clamp are respectively provided with a positive stop lug boss 417, these two limitsPosition boss clamping forms described guide chute 413.
In the present embodiment, the slide unit that respectively leads has the taper stress surface with stem stem jacking sliding bottom land wall adaptation, and this taper is stressedFace is in fact also as the inwall 414 of clamp; In the time that the guiding slide unit of each clamp is arranged in stem stem jacking sliding groove, folderThe outer wall 415 of line plate is parallel with the inwall 131 of a corresponding crimping boss; Each clamp is just to a corresponding crimping bossArrange, each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole 5, and the present embodiment forms four clamps altogetherHole; Each through wires hole in shrouding portion also just arranges a corresponding clamp hole.
Stem stem, under the spacing mating reaction of the guiding slide unit of its jacking sliding groove and clamp, can not rotate in pressure pipe portion,Can only moving axially along pressure pipe portion.
The conical outer wall of each guiding slide unit is also that the inwall 414 of clamp is provided with multiple anticreep teeth 416, and each anticreep tooth is usedIn engaging with the anticreep chisel teeth of stem stem, anti-skidding anti-retrogression.
Current transformer comprises toroidal inductive body 71 and intelligent control module 72; In the present embodiment, intelligent control module72 make the ring-type with toroidal inductive body with onesize vestibule, and annular perception induction body and intelligent control module are alsoRow arranges and is combined to form annular, on the sheathed outer wall that is fixed on base tube of current transformer entirety. In concrete practice, as long asMake all clamps hole be arranged in the vestibule of toroidal inductive body, also only need to make cable pass toroidal inductive originallyThe vestibule of body.
The present embodiment has four clamp holes, but in concrete practice, can only clamp three electric power cables, unnecessary oneClamp hole is for subsequent use or for clamping other auxiliary wire rod; Clamp when three electric power cables, toroidal inductive body can be forInduction zero sequence current signal, finds leak current fault in time, now can be used as a zero sequence current mutual inductor and uses.
In concrete practice, also the present embodiment can be made to the structure only with three clamp holes.
Intelligent control module comprises wireless transmit/receive units, intelligent control module by wireless transmit/receive units toroidal inductive bodyThe current signal sensing sends distance host to, to realize accurate long-range no worker monitor.
Bolt comprises the body of rod 31, is arranged on the fastening part 32 of body of rod one end and is arranged on the external screw thread company on body of rod periphery wallMeet portion 33; The fastening position of bolt is in shrouding portion outside, and the body of rod of bolt makes external screw thread through the spacing slide opening of shrouding portionConnecting portion is in the center screw of stem stem; The external diameter of bolted portion is greater than the spacing slide opening of shrouding portion.
Swivel bolt pulls stem stem to move towards the direction that approaches shrouding portion; Stem stem is by the taper electrolysis in jacking sliding groovePush the guiding slide unit of each clamp, and then promote each clamp and make it along radially outward the moving of pressure pipe portion, thereby clampBe arranged in the electric power cable in clamp hole.
The present embodiment, in order to promote chuck strength, is also provided with multiple punctures 6 in each deep-slotted chip breaker and arc clip slot; Concrete nextSay, each puncture is along the radially protrusion of core pipe portion.
In the present embodiment, each paw is the integral piece of making by injection mo(u)lding, and each puncture is made in the time of injection mo(u)lding; ?In concrete practice, puncture also can adopt alternate manner to make; For example in each deep-slotted chip breaker, be provided with multiple installation draw-in grooves, thenThe puncture sheet that adopts insulating materials to make is inlaid in to corresponding one to be installed in draw-in groove; Puncture sheet comprises installation portion and thorn swordPortion, installation portion is inlaid in to be installed in draw-in groove, and thorn blade exposes installing card groove and forms puncture. In concrete practice, also canTo adopt in the mode that screw thread is set in each arc clip slot and deep-slotted chip breaker, also can improving clamping sigma compactness energy.
The present embodiment has following useful technique effect: (1) operation is comparatively laborsaving, has good anti-loosening effect; .
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not to thisThe restriction of working of an invention mode. 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 thisThe apparent variation that belongs to connotation of the present invention a bit and extended out or variation still belong to protection scope of the present invention.
Claims (1)
1. a novel zero-sequence current transformer, is characterized in that: comprise base tube, stem stem, bolt, current transformerAnd cleat assembly; Base tube comprises pressure pipe portion and shrouding portion; Shrouding portion is relative with pressure pipe portion to be fixedly installed; Shrouding portion is provided with limitPosition slide opening and through wires hole; The inwall of pressure pipe portion is provided with at least three crimping boss; Stem stem be shaped as frustum, stem stemPeriphery wall on be axially arranged with at least three jacking sliding grooves and the taper crimping as each jacking sliding bottom land wall along pressure pipe portionFace; The center of stem stem is axially arranged with center screw along pressure pipe portion; Cleat assembly comprises at least three clamps; Each clampThe inwall of plate is provided with the guiding slide unit with jacking sliding groove adaptation; Each clamp is provided with guide chute; On each crimping boss, establishThereby have by with the spacing traveller of the adaptive spacing clamp moving direction of guide chute; Clamp is just to a corresponding crimpingBoss arranges; Each through wires hole in shrouding portion and a corresponding clamp hole are communicated with; Bolt comprises the body of rod, is arranged on the body of rod oneThe fastening part of end and be arranged on the external screw thread connecting portion on body of rod periphery wall; The fastening position of bolt is in shrouding portion outside, spiral shellThe body of rod of bolt makes external screw thread connecting portion in the center screw of stem stem through the spacing slide opening of shrouding portion; Bolted portionExternal diameter be greater than the spacing slide opening of shrouding portion; Current transformer comprises toroidal inductive body; Each clamp hole is all positioned at annular senseAnswer in the vestibule of body; The inwall of crimping boss is provided with deep-slotted chip breaker; The outer wall of clamp is provided with arc clip slot, each arcClevis groove and a corresponding deep-slotted chip breaker clamping form a clamp hole; In each arc clip slot and deep-slotted chip breaker, be provided with multiple punctures;In each arc clip slot and deep-slotted chip breaker, be provided with multiple installation draw-in grooves, respectively install and in draw-in groove, be embedded with a puncture blade; Each punctureSheet comprises installation portion and thorn blade, and installation portion is inlaid in to be installed in draw-in groove, and thorn blade exposes installing card groove and forms puncture;Swivel bolt pulls stem stem to move towards the direction that approaches shrouding portion; Stem stem pushes away by the taper electrolysis in each jacking sliding groovePress the guiding slide unit of each clamp, and then promote each clamp and make it along radially outward the moving of pressure pipe portion, thereby clamp positionElectric power cable in clamp hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096260.2A CN105609242A (en) | 2016-01-15 | 2016-01-15 | Novel zero sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096260.2A CN105609242A (en) | 2016-01-15 | 2016-01-15 | Novel zero sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105609242A true CN105609242A (en) | 2016-05-25 |
Family
ID=55989091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610096260.2A Withdrawn CN105609242A (en) | 2016-01-15 | 2016-01-15 | Novel zero sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105609242A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2712063A1 (en) * | 1977-03-15 | 1978-09-21 | Siemens Ag | INDUCTIVE, GAS- OR LIQUID-ISOLATED VOLTAGE CONVERTER |
| CN202159088U (en) * | 2011-08-04 | 2012-03-07 | 大庆电业局 | Remote online monitoring system of electric transmission line lightning arrester |
| CN102510128A (en) * | 2011-10-27 | 2012-06-20 | 王成楷 | Intelligent electric leakage remote monitoring protector of low-voltage power grid |
| CN104374964A (en) * | 2014-11-05 | 2015-02-25 | 江苏省电力公司常州供电公司 | Electric energy meter capable of measuring residual currents |
| CN104607681A (en) * | 2013-11-03 | 2015-05-13 | 西安志越机电科技有限公司 | Thin-wall round pipe turning and clamping device |
-
2016
- 2016-01-15 CN CN201610096260.2A patent/CN105609242A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2712063A1 (en) * | 1977-03-15 | 1978-09-21 | Siemens Ag | INDUCTIVE, GAS- OR LIQUID-ISOLATED VOLTAGE CONVERTER |
| CN202159088U (en) * | 2011-08-04 | 2012-03-07 | 大庆电业局 | Remote online monitoring system of electric transmission line lightning arrester |
| CN102510128A (en) * | 2011-10-27 | 2012-06-20 | 王成楷 | Intelligent electric leakage remote monitoring protector of low-voltage power grid |
| CN104607681A (en) * | 2013-11-03 | 2015-05-13 | 西安志越机电科技有限公司 | Thin-wall round pipe turning and clamping device |
| CN104374964A (en) * | 2014-11-05 | 2015-02-25 | 江苏省电力公司常州供电公司 | Electric energy meter capable of measuring residual currents |
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| Date | Code | Title | Description |
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| 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: 20160525 |
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| WW01 | Invention patent application withdrawn after publication |