CN105551754A - Three-phase zero sequence current transformer - Google Patents
Three-phase zero sequence current transformer Download PDFInfo
- Publication number
- CN105551754A CN105551754A CN201610097605.6A CN201610097605A CN105551754A CN 105551754 A CN105551754 A CN 105551754A CN 201610097605 A CN201610097605 A CN 201610097605A CN 105551754 A CN105551754 A CN 105551754A
- Authority
- CN
- China
- Prior art keywords
- paw
- press
- core pipe
- plate portion
- core
- 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- Withdrawn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
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- 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
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention discloses a three-phase zero sequence current transformer. The three-phase zero sequence current transformer comprises a core tube, two press rings and two sets of press claw assemblies, wherein two groups of guide holes are formed side by side on the wall of the core tube, each group of guide holes are adoptive to one set of press claw assembly and comprise three radial guide holes, each set of press claw assembly comprises three press claws, each press claw is provided with a press plate part, a guide sliding block part and a transmission plate part, each press plate part is arranged in a core tube cavity, each press ring is provided with three spiral grooves, the transmission plate part of each press claw is arranged in corresponding one spiral groove, the core rod is arranged in the core tube cavity, three arc clamping grooves are formed on the peripheral wall of the core rod, each arc clamping groove is arranged right opposite to an arc groove on the inner wall of the corresponding press claw, the core rod and each set of press claw assembly are combined to form three wire shearing holes, the current transformer comprises an annular substrate, the wire shearing holes are arranged in a hole cavity of the annular substrate, and the press plate part in the corresponding one set of press claw assembly is pushed to slide towards the center of the sliding tube when each press claw rotates. The three-phase zero sequence current transformer has a relatively high loosening prevention effect.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of three-phase zero sequence current mutual inductor.
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 three-phase zero sequence current mutual inductor with double shield and better anti-loosening effect.
The technical scheme realizing the object of the invention is: a kind of three-phase zero sequence current mutual inductor, comprises a core pipe, two pressure rings and two casing pressure claw assemblies; Core tube wall is provided with side by side two groups of pilot holes, each group pilot hole and a set of paw assembly adaptation; Each group of pilot hole comprises three radially-directed holes; Each casing pressure claw assembly comprises three paws; Each paw is provided with pressing plate portion, guide runner portion and driver plate portion; Each pressing plate portion is arranged in core pipe tube chamber; Core tube wall is stretched out in the outer end in the guide runner portion of paw, and each driver plate portion is positioned at outside core tube wall; Each paw reciprocatingly slides along a corresponding radially-directed hole; Each pressure ring rotates and is arranged on the periphery wall of core pipe, and the guide runner portion in a side of each pressure ring and corresponding a set of paw assembly slides adjacent; The end wall that each pressure ring and guide runner portion adjoin is provided with three helicla flutes, and these three helicla flutes are adaptive with three driver plate portions in corresponding a set of paw assembly respectively; The driver plate portion of each paw is arranged in a corresponding helicla flute; Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with three arc clip slots, and each arc clip slot axially extends along core pipe, 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; Plug and each casing pressure claw assembly are combined to form three clamp holes; Current transformer comprises annular matrix, and clamp hole is arranged in annular matrix vestibule; Multiple puncture is provided with in each deep-slotted chip breaker and arc clip slot; Each paw is the integral piece made by injection mo(u)lding, and each puncture is made when injection mo(u)lding; The periphery wall of plug is provided with four the supporting and location flanges protruded along core pipe radial direction, the internal perisporium of core pipe is provided with four positioning runners, the outboard end of each supporting and location flange is embedded in a corresponding positioning runner, thus plug is positioned in the tube chamber of core pipe; Pushed the driver plate portion of a corresponding paw when each pressure ring rotates by helicla flute, and then slide towards core tube hub in the pressing plate portion promoted in corresponding a set of paw assembly.
The present invention has positive effect: (1) the present invention adopts two casing pressure claw assemblies to be clamped on same cable, and drive corresponding a set of paw assembly respectively by two pressure rings, the clamp operation of each casing pressure claw assembly can be carried out separately, this structure has the effect of double shield, in use go wrong even if wherein a set of, also have its service behaviour of another set of guarantee.(2) the present invention drives paw clamping electric power cable by helicla flute, compares, have excellent anti-loosening effect, effectively ensure the reliability of long-term work with by traditional bolt assembly clamping electric power cable.
Accompanying drawing explanation
Fig. 1 is that the one of the first structure of the present invention partly cuts open structural representation;
Fig. 2 removes a kind of perspective view after current transformer for zero sequence current mutual inductor shown in Fig. 1;
A kind of front view that Fig. 3 is zero sequence current mutual inductor shown in Fig. 1;
Fig. 4 partly cuts open structural representation for the one of 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, sees shown in Fig. 1 to Fig. 5, comprises a core pipe 2, plug 7, current transformer 8, two pressure rings 1 and two casing pressure claw assemblies 3.
In the present embodiment, core pipe 2, plug 7, two pressure rings 1 and two casing pressure claw assemblies 3 all adopt insulating material to make.
Core pipe periphery wall is provided with the annular gear platform 21 of evagination; Core tube wall is provided with two groups of pilot holes vertically side by side, each group pilot hole and a set of paw assembly adaptation; Each group of pilot hole comprises three radially-directed holes 23, and these three radially-directed holes are evenly distributed on core tube wall along core pipe circumference; In the present embodiment, each radially-directed hole is along core caliber to running through core tube wall.
Each radially-directed hole 23 comprises the guiding slide opening 231 and anticreep slide opening 232 that axially set gradually along core pipe; Guiding slide opening is arranged on the edge of core pipe two side ends, and anticreep slide opening is communicated with guiding slide opening; The radial cross-sectional shape in each radially-directed hole is T-shaped; Each radially-directed hole 23 forms the breach that is positioned at core tube edges place.
Each casing pressure claw assembly includes three paws 5; Each paw is provided with pressing plate portion 51, along core caliber to the guide runner portion 52 extended and the driver plate portion 53 be arranged in guide runner portion; The driver plate portion of each paw is the flange axially outstanding along core pipe be arranged in each guide runner portion, and the outboard end of this flange is provided with chisel teeth 54.
Each pressing plate portion is all arranged in core pipe tube chamber, and core tube wall is stretched out in the outer end in the guide runner portion of each paw, and each driver plate portion is positioned at outside core tube wall; Each guide runner portion 52 comprises guide part 521 and anti-delinking part 522, and guide part is arranged in the guiding slide opening in a corresponding radially-directed hole, and anti-delinking part is arranged in the anticreep slide opening in a corresponding radially-directed hole; The radial cross-sectional shape of guide part and anti-delinking part is T-shaped with radially-directed hole adaptation.Each paw under the spacing of radially-directed hole and guide effect, along core caliber to reciprocatingly sliding; The inwall in each pressing plate portion is provided with deep-slotted chip breaker 55.
Two pressure rings 1 rotate and are arranged on the periphery wall of core pipe, and the both sides of separation annular gear platform; The internal perisporium of each pressure ring is the adjacent smooth inner wall that slides with core pipe periphery wall; The periphery wall of each pressure ring is provided with multiple binding groove 11; One side of each pressure ring and annular gear platform slide adjacent, and the guide runner portion in another side and corresponding a set of paw assembly slides adjacent; In the present embodiment, the end wall adjacent with guide runner portion of each pressure ring is provided with three helicla flutes 12, and three driver plate portions in these three helicla flutes and corresponding a set of paw assembly are adaptive.
In the present embodiment, each helicla flute comprises the anticreep district 121 that is communicated with pressure ring vestibule 13 and the disposal area 122 away from pressure ring vestibule; The diapire in anticreep district is provided with multiple wedge shape anticreep tooth 123, and the chisel teeth of each wedge shape anticreep tooth and paw is adaptive; Disposal area is smooth chute; The present embodiment is when operating, and the binding groove adopting hook type spanner to catch on pressure ring twists pressure ring.
Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with three arc clip slots 71, and each arc clip slot axially extends along core pipe, 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 61; So the present embodiment can form three clamp holes, can be used for clamping three cables simultaneously.
The periphery wall of plug is provided with four the supporting and location flanges 72 protruded along core pipe radial direction, the internal perisporium of core pipe is provided with four positioning runners 24, the outboard end of each supporting and location flange is embedded in a corresponding positioning runner, thus plug is positioned in the tube chamber of core pipe.
The present embodiment, in order to promote chuck strength, is also provided with multiple puncture 6 in each deep-slotted chip breaker; 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.
This current transformer comprises annular matrix 81 and intelligent control module; In the present embodiment, on the end wall of the adjacent annular gear platform of a pressure ring, be provided with annular arrangements groove; This current transformer is fixed in the resettlement groove of pressure ring; Pressure ring periphery wall is still provided with binding groove.Intelligent control module can comprise wireless transmit/receive units, and intelligent control module sends distance host by wireless transmit/receive units to the zero sequence current signal that annular matrix senses, to realize accurate long-range no worker monitor; This structure can make full use of space, is conducive to the small-sized and integrated of entirety.
In concrete practice, this current transformer also can be fixed on other position, as long as make clamp hole be arranged in annular matrix vestibule, is all feasible.
The driver plate portion of each paw is arranged in a corresponding helicla flute; Each helicla flute, along with pressure ring synchronous axial system, makes a corresponding driver plate portion from being positioned at disposal area to being positioned at anticreep district, also namely produces pushing effect to this driver plate portion; In the present embodiment, the paw in the independent corresponding a set of paw assembly of each pressure ring, makes the pressing plate portion in each casing pressure claw assembly close to each other towards core tube hub, thus clamping is arranged in the electric power cable in clamp hole.
When the chisel teeth in each pressing plate portion is clamped on the wedge shape anticreep tooth in corresponding anticreep district, wedge shape anticreep tooth prevents pressure ring from reversing, thus makes the present embodiment have good anti-loosening effect.
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 is by being arranged on the longitudinal center line place of zero sequence current mutual inductor cable clamping, and its gravity centre distribution is comparatively reasonable, when on the overhead power line of high-altitude, is conducive to alleviating vibration; In addition, the present embodiment is positioned each paw by the slope groove with wedge shape anticreep tooth, can play the technique effect preventing from falling back, and compares with by traditional bolt assembly clamping electric power cable, particularly excellent in anti-loosening effect, effectively ensure the reliability of long-term work.
The present embodiment adopts two casing pressure claw assemblies to be clamped on same cable, has the effect of dual fail-safe, in use goes wrong even if wherein a set of, also has its service behaviour of another set of guarantee.
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 three-phase zero sequence current mutual inductor, is characterized in that: comprise a core pipe, two pressure rings and two casing pressure claw assemblies; Core tube wall is provided with side by side two groups of pilot holes, each group pilot hole and a set of paw assembly adaptation; Each group of pilot hole comprises three radially-directed holes; Each casing pressure claw assembly comprises three paws; Each paw is provided with pressing plate portion, guide runner portion and driver plate portion; Each pressing plate portion is arranged in core pipe tube chamber; Core tube wall is stretched out in the outer end in the guide runner portion of paw, and each driver plate portion is positioned at outside core tube wall; Each paw reciprocatingly slides along a corresponding radially-directed hole; Each pressure ring rotates and is arranged on the periphery wall of core pipe, and the guide runner portion in a side of each pressure ring and corresponding a set of paw assembly slides adjacent; The end wall that each pressure ring and guide runner portion adjoin is provided with three helicla flutes, and these three helicla flutes are adaptive with three driver plate portions in corresponding a set of paw assembly respectively; The driver plate portion of each paw is arranged in a corresponding helicla flute; Plug is arranged in core pipe tube chamber; The periphery wall of plug is provided with three arc clip slots, and each arc clip slot axially extends along core pipe, 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; Plug and each casing pressure claw assembly are combined to form three clamp holes; Current transformer comprises annular matrix, and clamp hole is arranged in annular matrix vestibule; Multiple puncture is provided with in each deep-slotted chip breaker and arc clip slot; Each paw is the integral piece made by injection mo(u)lding, and each puncture is made when injection mo(u)lding; The periphery wall of plug is provided with four the supporting and location flanges protruded along core pipe radial direction, the internal perisporium of core pipe is provided with four positioning runners, the outboard end of each supporting and location flange is embedded in a corresponding positioning runner, thus plug is positioned in the tube chamber of core pipe; Pushed the driver plate portion of a corresponding paw when each pressure ring rotates by helicla flute, and then slide towards core tube hub in the pressing plate portion promoted in corresponding a set of paw assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610097605.6A CN105551754A (en) | 2016-01-15 | 2016-01-15 | Three-phase zero sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610097605.6A CN105551754A (en) | 2016-01-15 | 2016-01-15 | Three-phase zero sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105551754A true CN105551754A (en) | 2016-05-04 |
Family
ID=55830884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610097605.6A Withdrawn CN105551754A (en) | 2016-01-15 | 2016-01-15 | Three-phase zero sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105551754A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| CN202151702U (en) * | 2011-07-05 | 2012-02-29 | 湖北三江航天险峰电子信息有限公司 | Tool for centring and clamping large-scale rotational part |
| 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 |
| CN204724882U (en) * | 2015-06-01 | 2015-10-28 | 冯炯培 | A kind of three-jaw clamping device |
-
2016
- 2016-01-15 CN CN201610097605.6A patent/CN105551754A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| CN202151702U (en) * | 2011-07-05 | 2012-02-29 | 湖北三江航天险峰电子信息有限公司 | Tool for centring and clamping large-scale rotational part |
| 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 |
| CN204724882U (en) * | 2015-06-01 | 2015-10-28 | 冯炯培 | A kind of three-jaw clamping device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105609281A (en) | Zero-sequence current transformer for preventing cable from loosening | |
| CN105575641A (en) | Zero sequence current mutual inductor for preventing cable from being loosened | |
| CN105551754A (en) | Three-phase zero sequence current transformer | |
| CN105551784A (en) | Zero sequence current transformer | |
| CN105551752A (en) | Zero sequence power current transformer | |
| CN105551753A (en) | Zero sequence power current transformer | |
| CN105551760A (en) | Zero-sequence current transformer with relatively good anti-looseness performance | |
| CN105719790A (en) | Zero-sequence current transformer | |
| CN105551762A (en) | High-voltage zero-sequence current transformer with relatively good anti-looseness performance | |
| CN105590724A (en) | Three-phase power zero sequence current mutual inductor capable of preventing cables from loosening | |
| CN105590725A (en) | Three-phase power zero sequence current transformer capable of preventing cables from loosening | |
| CN105551761A (en) | Zero-sequence current transformer with relatively good anti-looseness performance | |
| CN105551719A (en) | High-voltage zero-sequence current mutual inductor with relatively good anti-loosening property | |
| CN105575613A (en) | Intelligent high-voltage transformer | |
| CN105590726A (en) | Three-phase zero sequence current mutual inductor capable of preventing cables from loosening | |
| CN105575612A (en) | Intelligent high-voltage transformer | |
| CN105575611A (en) | High-voltage mutual inductor | |
| CN205992471U (en) | There is the zero sequence current mutual inductor of preferably anti-loosening performance | |
| CN105761894A (en) | Three-phase zero-sequence current transformer with good anti-loosening performance | |
| CN105632700A (en) | Three-phase zero-sequence current transformer with relatively good anti-looseness performance | |
| CN105551732A (en) | High and medium-voltage electric zero-sequence current transformer | |
| CN105551731A (en) | High and medium-voltage electric zero-sequence current transformer | |
| CN105609289A (en) | High-voltage power zero-sequence current transformer | |
| CN105679499A (en) | Zero-sequence current transformer with relatively high cable-clamping firmness | |
| CN105742018A (en) | High-voltage and zero-sequence current transformer with relatively good wire clamping fastness |
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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160504 |