CN105869869A - Intelligent middle-high voltage zero-sequence current transformer - Google Patents
Intelligent middle-high voltage zero-sequence current transformer Download PDFInfo
- Publication number
- CN105869869A CN105869869A CN201610287433.9A CN201610287433A CN105869869A CN 105869869 A CN105869869 A CN 105869869A CN 201610287433 A CN201610287433 A CN 201610287433A CN 105869869 A CN105869869 A CN 105869869A
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- Prior art keywords
- core
- heat
- core tube
- conducting block
- hub axis
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Classifications
-
- 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
- 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
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
-
- 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
- H01F2038/305—Constructions with toroidal magnetic core
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses an intelligent middle-high voltage zero-sequence current transformer. The current transformer comprises a core tube, a current transformer body, two pressing claw assemblies, two planar nuts and six pressing connecting components, wherein six radial limit sliding holes are formed in the wall of the core tube; each pressing connecting part is provided with a pressing plate part and an anti-separation connecting part; each pressing connecting part is detachably arranged on the core tube through the corresponding anti-separation connecting part; each pressing claw assembly comprises three pressing claws; each pressing claw comprises an ejecting plate part, a guiding slider block part and a driving thread part; each guiding slider block part is inserted into the corresponding radial limit sliding hole in the core tube, and the driving thread parts extend into a tubular cavity of the core tube; each planar nut is rotationally arranged in the tubular cavity of the core tube and comprises a planar thread part; the current transformer body comprises an annular base body; a mounting screw hole in which a temperature sensing device is arranged is formed in at least one pressing connecting part. The current transformer has a real-time temperature monitoring function.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of intelligent mesohigh zero sequence current mutual inductor.
Background technology
The ultimate principle of zero-sequence current protection is based on Kirchhoff's current law (KCL): flow into the telegram in reply of any node in circuit
The algebraical sum of stream is equal to zero.In the case of circuit and electrical equipment are normal, the vector of each phase current is equal to zero, therefore, zero
The secondary side winding no signal output of sequence current transformer, executive component is failure to actuate.When occurring to get an electric shock or each during leak current fault
The vector of phase current is not zero, and fault current makes to produce in the iron core of zero sequence current mutual inductor magnetic flux, zero sequence current mutual inductor
Produced electric current is zero-sequence current.When protection mechanism receives this zero sequence current signal, can take accordingly according to electrical leakage quantity
Protection act.Mostly the mounting means of existing zero sequence current mutual inductor is to use flange install fixing or use bonding mode solid
Fixed, its installation site is it is generally required to reserve, therefore makes its application by more restriction.
Summary of the invention
It is an object of the invention to provide a kind of intelligent middle height being easily installed location and there is real time temperature control function
Pressure zero sequence current mutual inductor.
The technical scheme realizing the object of the invention is: a kind of intelligent mesohigh zero sequence current mutual inductor, including a core
Pipe, current transformer, two casing pressure claw assemblies, two plane nuts and six crimps；The tube wall of core pipe is provided with six
The most spacing slide opening；Each crimp is provided with pressing plate portion and anticreep connecting portion；Each crimp sets by anticreep connecting portion is dismountable
Putting on core pipe, pressing plate portion is positioned at outside core pipe；Each casing pressure claw assembly includes three paws；Each paw includes top plate portion, from top
The guide runner portion of the inwardly projecting formation of inwall in plate portion and the driving threaded portion being arranged in guide runner portion；Top plate portion is positioned at
Outside core pipe, the pressing plate portion clamping of top plate portion and a corresponding crimp forms one for the clamp hole clamping electric power cable；
Guide runner portion inserts on core pipe in a corresponding spacing slide opening of radial direction, drives threaded portion to stretch in the tube chamber of core pipe；Each flat
Face nut rotation is arranged in core pipe tube chamber；Each plane nut includes and the driving threaded portion of paw in corresponding a set of paw assembly
The flat thread portion that engagement is adaptive；Current transformer includes that annular matrix and intelligent control module, clamp hole are positioned at annular matrix
Vestibule in；Intelligent control module includes wireless transmit/receive units, and intelligent control module is electric this secondary by wireless transmit/receive units
Stream information sends distance host to；Annular matrix and core pipe are arranged concentrically, and annular matrix is positioned at the outside of crimp；Based Intelligent Control
Module is arranged on and is enclosed in the region formed by annular matrix inwall, core tube wall and crimp outer wall；At least one crimp
It is provided with the installation screw of built-in temperature sensing device；Temperature sensing device includes having the metal shell of storage tank, be arranged on appearance
Put the temperature sensor in groove, for spring temperature sensor being crimped in storage tank and the screwed pipe being used for limit spring
Plug；
Metal shell is spirally connected and is fixed in installation screw；Metal shell is provided with heat conduction boss close to one end of core tube hub axis,
Metal shell is provided with interior hexagonal away from one end of core tube hub axis and twists groove；The internal perisporium of storage tank is provided with internal threaded regions；
Temperature sensor includes the heat-conducting block using heat conductive insulating elastomeric material to make, the thermo-sensitive resistor being arranged in heat-conducting block, setting
Heat-conducting block connects electric mortiser post；Heat-conducting block is connected on the diapire of storage tank close to one end of core tube hub axis；Connect electric mortiser
Post protrudes and is arranged on the heat-conducting block other end away from core tube hub axis；Heat-conducting block is away from the other end of core tube hub axis
Enclosing formation cannelure between outer wall and the internal perisporium of storage tank, spring is positioned in this cannelure and is set in heat-conducting block away from core
On one end of tube hub axis；Screwed pipe plug is spirally connected and is fixed in storage tank；Screwed pipe plug is away from one end of core tube hub axis
Periphery wall be provided with outer-hexagonal and twist portion；The center of screwed pipe plug is provided with tube chamber；Spring is close to the one of core tube hub axis
End is connected on heat-conducting block, and spring is connected on screwed pipe plug away from the other end of core tube hub axis；Electricity is connect on heat-conducting block
Inserting column is positioned in the tube chamber of screwed pipe plug.
The present invention has a positive effect: the zero sequence current mutual inductor of (1) present invention owing to carrying press claw type retaining mechanism,
Can directly be fixedly installed on cable, it is not necessary to reserved installation position, it is easy to install, and there is preferable anti-loosening effect, firmly
Intensity is relatively high and stable reliably.(2) present invention compares with by traditional bolt assembly clamping electric power cable, can apply bigger
Pressure, and there is the anti-loosening effect of excellence, the reliability of long-term work is effectively ensured.(3) present invention uses two casing pressures
Claw assembly is clamped on same cable, has the effect of dual fail-safe, in use goes wrong even if the most a set of, also has another
Set ensures its service behaviour.(4) it is provided with the installation screw of built-in temperature sensing device due at least one crimp, therefore also has
Real time temperature control function.
Accompanying drawing explanation
Fig. 1 is a kind of perspective view of the first structure of the present invention；
Fig. 2 is a kind of front view of zero sequence current mutual inductor shown in Fig. 1；
Fig. 3 is that shown in Fig. 1, the one of zero sequence current mutual inductor partly cuts open structural representation；
Fig. 4 is a kind of perspective view after zero sequence current mutual inductor shown in Fig. 1 removes current transformer；
Fig. 5 is a kind of front view of zero sequence current mutual inductor shown in Fig. 4；
Fig. 6 is that shown in Fig. 4, the one of zero sequence current mutual inductor partly cuts open structural representation；
Fig. 7 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 4.
Fig. 8 is that the one of the second structure of the present invention partly cuts open structural representation；
Fig. 9 is the close-up schematic view in Fig. 8 at B；
Figure 10 is that one when removing current transformer of the zero sequence current mutual inductor shown in Fig. 8 partly cuts open structural representation.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of intelligent mesohigh zero sequence current mutual inductor, as shown in Fig. 1 to Fig. 7, including a core pipe 2, two
3, two plane nut 4, two set crimp assemblies of casing pressure claw assembly and a current transformer 9.
The tube wall of core pipe is provided with six spacing slide openings of radial direction 22, and each radially spacing slide opening all extends radially through core along core pipe
Tube wall；Each radially spacing slide opening be positioned at core pipe axially on middle part, the radial cross-sectional shape of each radially spacing hole is I-shaped；
The internal perisporium of core pipe is provided with the annular gear platform 23 of inwardly projecting formation.In the present embodiment, six radial direction spacing holes are divided into two groups,
In each group three radially spacing hole is for adaptive with corresponding a set of paw assembly.
Each set crimp assemblies is for adaptive with corresponding a set of paw assembly, and each set crimp assemblies all includes three crimps 1；
Each crimp is provided with pressing plate portion 11 and anticreep connecting portion 12；Crimp is arranged on core pipe by anticreep connecting portion is dismountable；
Pressing plate portion 11 is axially extending along core pipe, and the inwall in pressing plate portion is provided with arcuate groove 13, and the periphery wall in pressing plate portion is circular arc；Anticreep is even
The portion of connecing is two the post plates protruding inwardly from formation from pressing plate portion two side ends, and each post plate is axially extending along core pipe, the radial direction of each post plate
Cross sectional shape is L-shaped；In the present embodiment, two L-shaped post plates are oppositely arranged；
Three it are provided with vertically for the anticreep chute 24 installing location crimp on the periphery wall of core pipe；Each anticreep chute includes
Two radial sections are the mounting grooves 241 of L-shaped；In the present embodiment, two adjacent anticreep chutes are oppositely arranged；Each mounting groove and
A corresponding post plate is adaptive；The anticreep connecting portion of each crimp slips into along core pipe axial direction from a side of anticreep chute accordingly
In one anticreep chute；In concrete practice, anticreep connecting portion can select other shape, as long as making the anticreep of crimp
Connecting portion can not remove along core caliber to from anticreep chute；In concrete practice, it is possible to select the mode of clamping to install
Fixing crimp；Multiple draw-in groove is such as set on the periphery wall of core pipe, each pressing plate arranges the clamping protruded inwardly from and supports
Post or clamping gripper shoe, directly snap in each clamping support column or clamping gripper shoe in a corresponding draw-in groove, also can prevent clamping
Part removes core pipe along core pipe radial direction, and this structure is also feasible.
The inwall of a corresponding crimp is just arranged by each radially spacing slide opening.
In concrete practice, also two crimps axially adjacent along core pipe can be made of one part, then in the present embodiment
Two set crimp assemblies just unite two into one and become a set of crimp assemblies.
Each casing pressure claw assembly includes three paws 5 for forming clamp hole with crimp combination；Each paw includes top board
Portion 51, from the guide runner portion 52 of the inwardly projecting formation of the inwall of top plate portion and the driving threaded portion that is arranged on guide runner portion
53；Top plate portion is axially extending along core pipe, and guide runner portion radially extends along core pipe；The outer wall of paw top plate portion is provided with arc folder
Groove 511；Each paw top plate portion is positioned at outside core pipe, and just arranges the pressing plate portion of a corresponding crimp；Each guide runner portion
Insert on core pipe in a corresponding spacing slide opening of radial direction, in each tube chamber driving threaded portion to stretch to core pipe；Each paw is radially
Under the guide and limit effect of spacing slide opening, the radial direction along core pipe reciprocatingly slides；The radial cross-sectional shape in each guide runner portion is and footpath
To adaptive I-shaped of spacing hole.
In the present embodiment, the arcuate groove of a corresponding crimping boss is just arranged by the arc clip slot of each paw, and this paw
Arc clip slot and this crimping boss arcuate groove clamping formed a clamp hole 6, described clamp hole is provided with for increase hold
The thread groove of power；Each clamp hole is for one electric power cable of clamping；The present embodiment forms three clamp holes, altogether three electricity of clamping altogether
Line of force cable.Current transformer 9 includes annular matrix 91 and intelligent control module 92, and intelligent control module can include wireless receiving and dispatching
Unit, when having leakage current in three electric power cables, annular matrix will induce secondary current, and intelligent control module passes through nothing
Line Transmit-Receive Unit sends distance host to this secondary current information；Annular matrix and core pipe are arranged concentrically, and annular matrix is positioned at
The outside of crimp；Intelligent control module is arranged on to be enclosed by annular matrix inwall, core tube wall and crimp outer wall and is formed
In region, thus make full use of space, be conducive to the small-sized and integrated of entirety.
Two plane nut rotations are arranged in core pipe tube chamber, and are positioned at the both sides of annular gear platform；Each plane nut includes
Engage the flat thread portion 41 of adaptation with the threaded portion that drives of paw in corresponding a set of paw assembly and be positioned in plane nut
Fastening part 42 at the heart；Each plane nut adjoins the flat thread portion that arranges on a side of paw assembly, each plane nut another
One side and core pipe gear platform slide adjacent；The periphery wall of each plane nut and core inside pipe wall slide adjacent；Flat thread portion is ring
Shape, flat thread portion is provided with archimedean spiral groove, and the driving threaded portion of paw assembly is provided with and this Archimedian screw
The thread groove that groove is adaptive, each side driving threaded portion to be arranged on guide runner portion, place adjacent flat nut.
In the present embodiment, the fastening part of each plane nut is interior hexagonal shape fastener hole or interior hexagonal shape binding groove, and it twists behaviour
Make to use inner hexagon spanner；In concrete practice, described fastening part just can use other shape, the most square or in-line or prunus mume (sieb.) sieb.et zucc.
Flower-shape, all can select.
Each plane nut, in reciprocating rotation, drives its flat thread portion reciprocating rotation, and then by engaging adaptation
The threaded portion that drives drive the paw in corresponding a set of paw assembly, owing to each paw is made at the guide and limit of radially spacing slide opening
Under with, the radial direction only along core pipe moves back and forth so that in corresponding a set of paw assembly the move mode of paw be towards
Core tube hub close to each other or away from, thus unclamp or clamp the electric power cable being positioned in clamp hole.
When the present embodiment is on the overhead power line of high-altitude, be conducive to alleviating vibration；It addition, the present embodiment passes through plane
Threaded portion drives paw clamping electric power cable, compares, in anti-loosening effect with by traditional bolt assembly clamping electric power cable
On particularly excellent, the reliability of long-term work is effectively ensured.Additionally, due to crimp is to be pacified by sliding or crimping mode
It is contained on core pipe, can first cable be placed in the arc clip slot of each paw, more corresponding crimp is loaded corresponding anticreep
In chute, corresponding electric power cable can be placed in clamp hole；This structure make clamp electric power cable easy and simple to handle easily
OK.Finally, due to the fact that and have employed two casing pressure claw assemblies for clamping electric power cable, also there is the technique effect of dual fail-safe.
The present embodiment entirety can use as high pressure zero sequence current mutual inductor, for detecting the existence of leakage current, and
Shi Faxian leak current fault.
(embodiment 2)
The present embodiment and above-described embodiment 1 are essentially identical, and difference is: as shown in Fig. 8 to Figure 10, in the present embodiment, and intelligence
The monnolithic case of energy control module is also annular；Toroidal inductive body 91 and intelligent control module 92 are set in crimp side by side
On periphery wall.
At least one crimp 1 is provided with the installation screw 15 extending radially through pressing plate portion along core pipe；This installation screw is fixed
It is provided with a temperature sensing device 8.
Temperature sensing device 8 includes the metal shell 81 with storage tank 811 that metal material makes, is arranged on storage tank
In temperature sensor 82, the spring 83 for temperature sensor is crimped on storage tank diapire, the spiral shell that is used for limit spring
Pipe plug 84.
Metal shell is provided with as puncturing the heat conduction boss 813 used, metal-back close to one end 812 of core tube hub axis
Body is provided with interior hexagonal away from one end 814 of core tube hub axis and twists groove 815；The periphery wall of metal shell is provided with and installs spiral shell
The external screw thread 816 that hole is adaptive, the internal perisporium of storage tank is provided with internal threaded regions 817；Heat conduction boss is close to core from metal shell
The sharp tooth boss formed is protruded in one end 812 of tube hub axis.
Temperature sensor includes using the heat-conducting block 821 that heat conductive insulating elastomeric material is made, the U-shaped being arranged in heat-conducting block
Thermo-sensitive resistor 822, two be arranged on heat-conducting block connect electric mortiser post 823；Heat-conducting block can be reciprocal in the storage tank of metal shell
Slide；Heat-conducting block is connected on the diapire of storage tank close to one end of core tube hub axis；Two connect electric mortiser post protrusion and are arranged on
On the heat-conducting block other end away from core tube hub axis.
Heat-conducting block encloses formation annular between outer wall and the internal perisporium of storage tank away from the other end of core tube hub axis
Groove 100, spring is positioned in this cannelure and is set on heat-conducting block one end away from core tube hub axis.
Screwed pipe plug is provided with external screw thread district 841 close to the periphery wall of one end of core tube hub axis, this external screw thread district and
The internal threaded regions 817 of metal shell is adaptive；Screwed pipe plug is provided with outer-hexagonal away from the periphery wall of one end of core tube hub axis
Twist portion 842；The center of screwed pipe plug is provided with tube chamber 843；Screwed pipe plug is fixedly installed on cannelure by its external screw thread district
In.
Spring is connected on heat-conducting block close to one end of core tube hub axis, and spring is away from the other end of core tube hub axis
It is connected on screwed pipe plug；On heat-conducting block two connect electric mortiser post and are positioned in the tube chamber 843 of screwed pipe plug.
This structure has the following advantages, owing to metal shell is easily deformed when extruding cable, and extrusion temperature sensor
Heat-conducting block, if heat-conducting block does not has mobile space, then easily pressurized deformation damages；The present embodiment, can by arranging spring
Heat-conducting block is crimped on the diapire of metal shell storage tank so that it is can correctly predict cable and junction, pressing plate pressing plate portion
Real time temperature；Can also be when, after metal shell compressive deformation, reserving mobile space to heat-conducting block, thus prevent heat-conducting block by pressurized
Damage；This structure has preferably Practical Performance.
In concrete practice, an installation screw can be respectively provided with on each crimp and one be built in this installation screw
In temperature sensing device, for each cable and and the temperature of crimp junction monitor in real time, thus realize
It is further intelligent that power network monitoring runs.
The internal perisporium of intelligent control module 92 is provided with inwardly projecting two and connects electric bushing (being not drawn on figure), respectively connects electricity
Socket inserts corresponding one and connects in electric bushing, so that temperature sensor is connected with the middle control circuit in intelligent control module.
The present embodiment can be used in clamping three phase cables, and now the present embodiment entirety can be mutual as high pressure zero-sequence current
Sensor uses, for detecting the existence of leakage current, to find leak current fault in time.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not right
The restriction of embodiments of the present invention.For those of ordinary skill in the field, the most also may be used
To make other changes in different forms.Here without also cannot all of embodiment be given exhaustive.And these
Belong to obvious change that the connotation of the present invention extended out or variation still falls within protection scope of the present invention.
Claims (1)
1. an intelligent mesohigh zero sequence current mutual inductor, it is characterised in that: include a core pipe, current transformer,
Two casing pressure claw assemblies, two plane nuts and six crimps；The tube wall of core pipe is provided with six spacing slide openings of radial direction；Each crimping
Part is provided with pressing plate portion and anticreep connecting portion；Each crimp is arranged on core pipe by anticreep connecting portion is dismountable, pressing plate position
Outside core pipe；Each casing pressure claw assembly includes three paws；Each paw includes top plate portion, from the inwardly projecting shape of the inwall of top plate portion
The guide runner portion become and the driving threaded portion being arranged in guide runner portion；Top plate portion is positioned at outside core pipe, top plate portion and phase
The pressing plate portion clamping answering a crimp forms one for clamping the clamp hole of electric power cable；Guide runner portion inserts on core pipe
In a corresponding spacing slide opening of radial direction, threaded portion is driven to stretch in the tube chamber of core pipe；Each plane nut rotation is arranged on core pipe
In tube chamber；Each plane nut includes engaging the flat thread of adaptation with the threaded portion that drives of paw in corresponding a set of paw assembly
Portion；Current transformer includes that annular matrix and intelligent control module, clamp hole are positioned in the vestibule of annular matrix；Based Intelligent Control mould
Block includes wireless transmit/receive units, and intelligent control module sends this secondary current information to the most main by wireless transmit/receive units
Machine；Annular matrix and core pipe are arranged concentrically, and annular matrix is positioned at the outside of crimp；Intelligent control module is arranged on by circular base
Internal wall, core tube wall and crimp outer wall enclose in the region of formation；At least one crimp is provided with built-in temperature sensing dress
The installation screw put；Temperature sensing device include having the metal shell of storage tank, the temperature sensor being arranged in storage tank,
For the spring that temperature sensor is crimped in storage tank and the screwed pipe plug being used for limit spring；
Metal shell is spirally connected and is fixed in installation screw；Metal shell is provided with heat conduction boss close to one end of core tube hub axis,
Metal shell is provided with interior hexagonal away from one end of core tube hub axis and twists groove；The internal perisporium of storage tank is provided with internal threaded regions；
Temperature sensor includes the heat-conducting block using heat conductive insulating elastomeric material to make, the thermo-sensitive resistor being arranged in heat-conducting block, setting
Heat-conducting block connects electric mortiser post；Heat-conducting block is connected on the diapire of storage tank close to one end of core tube hub axis；Connect electric mortiser
Post protrudes and is arranged on the heat-conducting block other end away from core tube hub axis；Heat-conducting block is away from the other end of core tube hub axis
Enclosing formation cannelure between outer wall and the internal perisporium of storage tank, spring is positioned in this cannelure and is set in heat-conducting block away from core
On one end of tube hub axis；Screwed pipe plug is spirally connected and is fixed in storage tank；Screwed pipe plug is away from one end of core tube hub axis
Periphery wall be provided with outer-hexagonal and twist portion；The center of screwed pipe plug is provided with tube chamber；Spring is close to the one of core tube hub axis
End is connected on heat-conducting block, and spring is connected on screwed pipe plug away from the other end of core tube hub axis；Electricity is connect on heat-conducting block
Inserting column is positioned in the tube chamber of screwed pipe plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610287433.9A CN105869869A (en) | 2016-05-02 | 2016-05-02 | Intelligent middle-high voltage zero-sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610287433.9A CN105869869A (en) | 2016-05-02 | 2016-05-02 | Intelligent middle-high voltage zero-sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105869869A true CN105869869A (en) | 2016-08-17 |
Family
ID=56630202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610287433.9A Withdrawn CN105869869A (en) | 2016-05-02 | 2016-05-02 | Intelligent middle-high voltage zero-sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105869869A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1319448A2 (en) * | 2001-12-11 | 2003-06-18 | Mario Fabris | Two stage clamping pinion |
| CN101419096A (en) * | 2008-12-12 | 2009-04-29 | 王涛 | Temperature sensor fixing structure on high-pressure electrified conductor and electrified installation tool thereof |
| 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
- 2016-05-02 CN CN201610287433.9A patent/CN105869869A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1319448A2 (en) * | 2001-12-11 | 2003-06-18 | Mario Fabris | Two stage clamping pinion |
| CN101419096A (en) * | 2008-12-12 | 2009-04-29 | 王涛 | Temperature sensor fixing structure on high-pressure electrified conductor and electrified installation tool thereof |
| 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 |
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