CN105575604A - Zero sequence current transformer for improving wire clamping strength - Google Patents
Zero sequence current transformer for improving wire clamping strength Download PDFInfo
- Publication number
- CN105575604A CN105575604A CN201610096706.1A CN201610096706A CN105575604A CN 105575604 A CN105575604 A CN 105575604A CN 201610096706 A CN201610096706 A CN 201610096706A CN 105575604 A CN105575604 A CN 105575604A
- Authority
- CN
- China
- Prior art keywords
- core pipe
- pipe portion
- pressing
- paw
- current transformer
- 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- Withdrawn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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
- F16L3/10—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing
-
- 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
-
- 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
- H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention discloses a zero sequence current transformer for improving the wire clamping strength. The zero sequence current transformer comprises a base body, a pressing ring, a core rod, a current transformer body and a pressing claw assembly. The base body comprises a basic pipe portion, a core pipe portion and a connecting plate portion. Guide sliding holes are formed in the pipe wall of the core pipe portion. The pressing claw assembly comprises pressing claws. Each pressing claw is provided with a pressing plate portion and a guide sliding column portion. A stressed oblique plane is arranged at the top end of the guide sliding column portion. The pressing plate portions are located in a pipe cavity of the core pipe portion. The pressing ring comprises a conical pressing-connection face and an outer threaded area. The conical pressing-connection face is pressed and connected on the stressed oblique planes of the pressing claws. The core rod is located in the pipe cavity of the core pipe portion. At least three arc-shaped clamping grooves are formed in the outer peripheral wall of the core rod, and each arc-shaped clamping groove is clamped with one corresponding arc-shaped groove to form a wire clamping hole. The current transformer body comprises an annular sensing body. Wire clamping holes are all located in a hole cavity of the annular sensing body. The pressing ring pushes and presses the stressed oblique planes of the pressing claws through the conical pressing-connection face so that the pressing plate portions can move towards the center of the core pipe portion. The zero sequence current transformer has better electrical performance.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of zero sequence current mutual inductor of improving clamping line strength.
Background technology
The general principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): the algebraical sum flowing into the telegram in reply stream of any node in circuit equals zero.Under circuit and the normal situation of electric equipment, the vector of each phase current equals zero, and therefore, the secondary side winding no signal of zero sequence current mutual inductor exports, and executive component is failure to actuate.The vector of each phase current when there is electric shock or leak current fault is non-vanishing, and fault current makes to produce magnetic flux in the iron core of zero sequence current mutual inductor, and the electric current that zero sequence current mutual inductor produces 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 generally needs to reserve, therefore makes 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 zero sequence current mutual inductor being convenient to install location, there is the improving clamping line strength of better firmness.
The technical scheme realizing the object of the invention is: a kind of zero sequence current mutual inductor of improving clamping line strength, comprises a matrix, a pressure ring, plug, a current transformer and an a set of paw assembly; Matrix comprise be provided with internal threaded regions base tube portion, be arranged on the core pipe portion in base tube tube chamber and the web portion for being connected and fixed base tube portion and core pipe portion; The tube wall in core pipe portion is provided with one group of pilot hole, and this group pilot hole comprises at least three guiding slide openings; Each guiding slide opening runs through the tube wall in core pipe portion along core pipe portion radial direction; Paw assembly comprises at least three paws; Each paw is provided with pressing plate portion and guiding traveller portion; Guiding traveller portion protrudes from pressing plate portion and is formed, and the top in guiding traveller portion is provided with a stressed inclined-plane; The pressing plate portion of each paw is arranged in the tube chamber in core pipe portion, and guiding traveller portion extend out to the outside in core pipe portion through a corresponding guiding slide opening, and is arranged in the tube chamber in base tube portion; Pressure ring comprises the taper electrolysis set within it on perisporium and the external screw thread district be arranged on pressure ring periphery wall; The taper electrolysis of pressure ring is crimped on the stressed inclined-plane of each paw, the external screw thread district of pressure ring and the internal threaded regions adaptation in base tube portion; Plug is arranged in core pipe portion tube chamber; The periphery wall of plug is provided with at least three arc clip slots, and each arc clip slot axially extends along core pipe portion, and each arc clip slot is just arranged the deep-slotted chip breaker on a corresponding paw inwall; Each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole; Current transformer comprises toroidal inductive body; Each clamp hole is all arranged in the vestibule of toroidal inductive body; Base tube portion and core pipe portion are arranged with one heart, and web portion is the annular slab between base tube portion and core pipe portion; Web portion is positioned at the end margin place, the same side in base tube portion and core pipe portion; Base tube portion, core pipe portion and web portion are integral pieces; Paw is identical with the quantity of guiding slide opening; Each guiding slide opening is evenly distributed on the tube wall in core pipe portion along the circumference in core pipe portion; The shape of each guiding slide opening is I shape, circle, square or rhombus; The shape in each guiding traveller portion and the shape adaptation of guiding slide opening; When pressure ring rotates along preset direction, pushed the stressed inclined-plane of each paw by taper electrolysis, the pressing plate portion of each paw is moved towards the center in core pipe portion, thus clamping is 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, owing to carrying press claw type retaining mechanism, does not need reserved installation position, is easy to install.(2) pressure ring is connected threadably with base tube portion, and crimps each paw by taper electrolysis and make it clamp electric power cable, and its operation is comparatively laborsaving, and has good anti-loosening effect; (3) by cable clamping is arranged on core tube hub place, make overall gravity centre distribution comparatively reasonable, when on the overhead power line of high-altitude, be conducive to alleviating vibration.
Accompanying drawing explanation
Fig. 1 is that one of the present invention partly cuts open structural representation;
A kind of perspective view that Fig. 2 is zero sequence current mutual inductor shown in Fig. 1;
Fig. 3 is for zero sequence current mutual inductor shown in Fig. 1 is from a kind of perspective view during another angle views;
Fig. 4 partly cuts open structural representation for the one of matrix in zero sequence current mutual inductor shown in Fig. 1;
A kind of explosive view that Fig. 5 is zero sequence current mutual inductor shown in Fig. 1;
Fig. 6 removes a kind of explosive view after pressure ring for zero sequence current mutual inductor shown in Fig. 1.
Embodiment
(embodiment 1)
The present embodiment is a kind of zero sequence current mutual inductor of improving clamping line strength, sees shown in Fig. 1 to Fig. 6, comprises a matrix 1, pressure ring 2, plug 7, current transformer 8 and a set of paw assembly 3.
In the present embodiment, matrix 1, pressure ring 2, plug 7 and a set of paw assembly 3 all adopt insulating material to make.
Matrix 1 comprise be provided with internal threaded regions 111 base tube portion 11, be arranged on the core pipe portion 12 in base tube tube chamber and the web portion 13 for being connected and fixed base tube portion and core pipe portion; Base tube portion and core pipe portion are arranged with one heart, and web portion is the annular slab between base tube portion and core pipe portion, and in the present embodiment, web portion is positioned at the end margin place, the same side in base tube portion and core pipe portion; Base tube portion is fixedly connected with core pipe portion by a planform demand fulfillment of web portion.
Base tube portion in the present embodiment, core pipe portion and web portion are integral pieces, also can adopt the form of split part in concrete practice.
The tube wall in core pipe portion is provided with one group of pilot hole, and this group pilot hole comprises four guiding slide openings 121, and these four guiding slide openings are evenly distributed on the tube wall in core pipe portion along the circumference in core pipe portion; Each guiding slide opening runs through the tube wall in core pipe portion along core pipe portion radial direction, and the shape of each guiding slide opening is I shape.In concrete practice, the shape of guiding slide opening also can adopt other shape, and such as circular, square, rhombus is all feasible.
Paw assembly 3 comprises four paws 31;
Each paw is provided with pressing plate portion 311 and guiding traveller portion 312; Guiding traveller portion protrudes from a side in pressing plate portion and is formed, and guiding traveller portion is arranged in a corresponding guiding slide opening, and the top in guiding traveller portion is provided with a stressed inclined-plane 313; The one end away from guiding traveller portion in pressing plate portion is as the inwall in pressing plate portion, and the inwall in pressing plate portion is provided with deep-slotted chip breaker 314.The shape in each guiding traveller portion and the shape adaptation of guiding slide opening.
The pressing plate portion of each paw is arranged in the tube chamber in core pipe portion, and guiding traveller portion extend out to the outside in core pipe portion through a corresponding guiding slide opening, and is arranged in the tube chamber in base tube portion.
Pressure ring 2 comprises the taper electrolysis 21 set within it on perisporium and the external screw thread district 22 be arranged on pressure ring periphery wall; The taper electrolysis of pressure ring is crimped on the stressed inclined-plane of each paw, the external screw thread district of pressure ring and the internal threaded regions adaptation in base tube portion.
In the present embodiment, pressure ring rotates and is arranged on the periphery wall in core pipe portion, and the inwall of pressure ring is provided with the concentric stroking junction adjacent with the slip of core pipe portion periphery wall; But in concrete practice, the internal perisporium of pressure ring can and the periphery wall in core pipe portion between reserve gap, be also feasible.
In the present embodiment, the periphery wall of pressure ring and the periphery wall in base tube portion are equipped with multiple binding groove 5, it is twisted and hook spanner can be adopted to operate, certainly other fastening means can also be adopted, such as on the periphery wall of pressure ring and the periphery wall in base tube portion, arranging hexagonal shape fastener head, is also feasible.
Plug is arranged in core pipe portion tube chamber; The periphery wall of plug is provided with four arc clip slots 71, and each arc clip slot axially extends along core pipe portion, and each arc clip slot is just arranged the deep-slotted chip breaker on a corresponding paw inwall; Each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole 4; So the present embodiment can form four clamp holes, during use, wherein three clamp holes respectively clamp a phase line cable, and another one folder hole is as subsequent use.
The periphery wall of plug is provided with four the supporting and location flanges 72 protruded along core pipe portion radial direction, the internal perisporium in core pipe portion is provided with four positioning runners 122, the outboard end of each supporting and location flange is embedded in a corresponding positioning runner, thus plug is positioned in the tube chamber in core pipe portion.
Current transformer comprises toroidal inductive body 81 and intelligent control module; In the present embodiment, web portion is provided with annular groove 131 away from a side of pressure ring, and the toroidal inductive body of current transformer and intelligent control module are fixed in annular groove.In concrete practice, current transformer also can be fixedly installed on the tube wall in core pipe portion, as long as make clamp hole be arranged in the vestibule of toroidal inductive body, also namely only needs to make cable pass the vestibule of toroidal inductive body.
Because three electric power cables pass from toroidal inductive body vestibule, this current transformer can carry out zero-sequence current detection by induction mode to three electric power cables, for Timeliness coverage leakage current fault; Intelligent control module sends real time information to distance host by wireless transmit/receive units, for power circuit intellectuality provides basic data.
When pressure ring rotates along preset direction, pushed the stressed inclined-plane of each paw by taper electrolysis, the pressing plate portion of each paw is moved towards the center in core pipe portion, thus clamping is arranged in the electric power cable in each clamp hole.
The present embodiment, in order to promote chuck strength, is also provided with multiple puncture 6 in each deep-slotted chip breaker and arc clip slot; Specifically, each puncture is protruded along the radial direction in core pipe portion.
In the present embodiment, each paw is the integral piece made by injection mo(u)lding, and each puncture is made when injection mo(u)lding; In concrete practice, puncture also can adopt alternate manner to make; Such as in each deep-slotted chip breaker, be provided with multiple installation draw-in groove, then the puncture sheet adopting insulating material to make be inlaid in corresponding one and install in draw-in groove; Puncture sheet comprises installation portion and thorn blade, and installation portion is inlaid in be installed in draw-in groove, and thorn blade then exposes installing card groove and forms puncture.In concrete practice, can also adopt in the mode arranging screw thread in each arc clip slot and deep-slotted chip breaker, also can improving clamping sigma compactness energy.
The present embodiment has following Advantageous Effects: (1) pressure ring is connected threadably with base tube portion, and crimps each paw by taper electrolysis and make it clamp electric power cable, and its operation is comparatively laborsaving, and has good anti-loosening effect; (2) by cable clamping is arranged on center, core pipe portion, make overall gravity centre distribution comparatively reasonable, when on the overhead power line of high-altitude, be conducive to alleviating vibration.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, 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 exhaustive without the need to also giving all execution modes.And these belong to connotation of the present invention the apparent change of extending out or variation still belong to protection scope of the present invention.
Claims (1)
1. a zero sequence current mutual inductor for improving clamping line strength, is characterized in that: comprise a matrix, a pressure ring, plug, a current transformer and an a set of paw assembly; Matrix comprise be provided with internal threaded regions base tube portion, be arranged on the core pipe portion in base tube tube chamber and the web portion for being connected and fixed base tube portion and core pipe portion; The tube wall in core pipe portion is provided with one group of pilot hole, and this group pilot hole comprises at least three guiding slide openings; Each guiding slide opening runs through the tube wall in core pipe portion along core pipe portion radial direction; Paw assembly comprises at least three paws; Each paw is provided with pressing plate portion and guiding traveller portion; Guiding traveller portion protrudes from pressing plate portion and is formed, and the top in guiding traveller portion is provided with a stressed inclined-plane; The pressing plate portion of each paw is arranged in the tube chamber in core pipe portion, and guiding traveller portion extend out to the outside in core pipe portion through a corresponding guiding slide opening, and is arranged in the tube chamber in base tube portion; Pressure ring comprises the taper electrolysis set within it on perisporium and the external screw thread district be arranged on pressure ring periphery wall; The taper electrolysis of pressure ring is crimped on the stressed inclined-plane of each paw, the external screw thread district of pressure ring and the internal threaded regions adaptation in base tube portion; Plug is arranged in core pipe portion tube chamber; The periphery wall of plug is provided with at least three arc clip slots, and each arc clip slot axially extends along core pipe portion, and each arc clip slot is just arranged the deep-slotted chip breaker on a corresponding paw inwall; Each arc clip slot and a corresponding deep-slotted chip breaker clamping form a clamp hole; Current transformer comprises toroidal inductive body; Each clamp hole is all arranged in the vestibule of toroidal inductive body; Base tube portion and core pipe portion are arranged with one heart, and web portion is the annular slab between base tube portion and core pipe portion; Web portion is positioned at the end margin place, the same side in base tube portion and core pipe portion; Base tube portion, core pipe portion and web portion are integral pieces; Paw is identical with the quantity of guiding slide opening; Each guiding slide opening is evenly distributed on the tube wall in core pipe portion along the circumference in core pipe portion; The shape of each guiding slide opening is I shape, circle, square or rhombus; The shape in each guiding traveller portion and the shape adaptation of guiding slide opening; When pressure ring rotates along preset direction, pushed the stressed inclined-plane of each paw by taper electrolysis, the pressing plate portion of each paw is moved towards the center in core pipe portion, thus clamping is arranged in the electric power cable in clamp hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096706.1A CN105575604A (en) | 2016-01-15 | 2016-01-15 | Zero sequence current transformer for improving wire clamping strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096706.1A CN105575604A (en) | 2016-01-15 | 2016-01-15 | Zero sequence current transformer for improving wire clamping strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105575604A true CN105575604A (en) | 2016-05-11 |
Family
ID=55885635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610096706.1A Withdrawn CN105575604A (en) | 2016-01-15 | 2016-01-15 | Zero sequence current transformer for improving wire clamping strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105575604A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493062A (en) * | 2018-05-29 | 2018-09-04 | 首瑞（天津）电气设备有限公司 | Major loop for residual current circuit breaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0958758A1 (en) * | 1998-05-20 | 1999-11-24 | Fickinger, Helga | Screw-less tube connector |
| CN201036156Y (en) * | 2007-02-02 | 2008-03-12 | 湖北盛佳电器设备有限公司 | Current mutual inductor with connection cable |
| 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 CN201610096706.1A patent/CN105575604A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0958758A1 (en) * | 1998-05-20 | 1999-11-24 | Fickinger, Helga | Screw-less tube connector |
| CN201036156Y (en) * | 2007-02-02 | 2008-03-12 | 湖北盛佳电器设备有限公司 | Current mutual inductor with connection cable |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108493062A (en) * | 2018-05-29 | 2018-09-04 | 首瑞（天津）电气设备有限公司 | Major loop for residual current circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105575604A (en) | Zero sequence current transformer for improving wire clamping strength | |
| CN105575605A (en) | Electric zero sequence current transformer for improving wire clamping strength | |
| CN105575602A (en) | Zero-sequence current transformer for improving wire clamping strength | |
| CN105575606A (en) | Middle and high voltage zero-sequence current transformer for improving wire clamping strength | |
| CN105632695A (en) | Electric power zero-sequence current transformer capable of improving wire clamp strength | |
| CN105609244A (en) | Intelligent high-voltage transformer capable of promoting wire clamping strength | |
| CN105761891A (en) | Intelligent three-phase middle-high voltage zero sequence current transformer for improving wire clamping strength | |
| CN105575601A (en) | High-voltage electric transformer for improving wire clamping strength | |
| CN105742021A (en) | Three-phase power middle-high voltage and zero-sequence current transformer for improving wire clamping strength | |
| CN105551728A (en) | Zero-sequence current transformer of overhead line | |
| CN105845330A (en) | Three-phase medium- and high-voltage zero sequence current transformer for improving wire clamping strength | |
| CN105609288A (en) | Three-phase middle and high voltage zero sequence current transformer capable of promoting wire clamping strength | |
| CN105575603A (en) | High-voltage instrument transformer for improving wire clamping strength | |
| CN105551748A (en) | Intelligent zero-sequence current transformer with relatively high wire clamping strength | |
| CN105845331A (en) | Intelligent middle-high-voltage zero-sequence current transformer capable of improving wire-clamping strength | |
| CN105551749A (en) | Intelligent high-voltage zero sequence current transformer having relatively high wire shearing strength | |
| CN105551763A (en) | Improved zero-sequence current transformer | |
| CN105551764A (en) | Improved middle-high voltage zero-sequence current transformer | |
| CN105551757A (en) | Power zero-sequence current transformer for preventing cable from loosening | |
| CN105575641A (en) | Zero sequence current mutual inductor for preventing cable from being loosened | |
| CN105575593A (en) | High-voltage zero-sequence current transformer easy to install | |
| CN106158260A (en) | A kind of electric power zero sequence current mutual inductor preventing cable from getting loose | |
| CN105575615A (en) | Zero sequence current mutual inductor for electric power circuit | |
| CN105609257A (en) | Improved high-voltage zero sequence current transformer | |
| CN105609298A (en) | Improved middle- and high-voltage zero sequence current transformer |
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: 20160511 |
|
| WW01 | Invention patent application withdrawn after publication |