CN105845352A - Three-phase zero sequence current transformer - Google Patents
Three-phase zero sequence current transformer Download PDFInfo
- Publication number
- CN105845352A CN105845352A CN201610286123.5A CN201610286123A CN105845352A CN 105845352 A CN105845352 A CN 105845352A CN 201610286123 A CN201610286123 A CN 201610286123A CN 105845352 A CN105845352 A CN 105845352A
- Authority
- CN
- China
- Prior art keywords
- core
- core tube
- heat
- plate portion
- core pipe
- 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- Withdrawn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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
-
- 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
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/38—Instruments transformers for polyphase ac
-
- 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
- H02G7/04—Arrangements or devices for relieving mechanical tension
-
- 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
Abstract
The invention discloses a three-phase zero sequence current transformer. The three-phase zero sequence current transformer comprises a core tube, a set of press claw assemblies, a planar nut, a current transformer and three crimping elements, wherein each crimping element is provided with a press plate part and a disconnection-preventing connection part and is detachably arranged on the core tube by the disconnection-preventing connection part, the press plate parts are arranged outside the core tube, three radial limitation sliding holes are formed in the tube wall of the core tube, the press claw assemblies comprise three press claws, each press claw comprises a top plate part, a guide sliding block part and a driving thread part, the guide sliding block part is inserted into the corresponding radial limiting sliding hole, the driving thread parts extend into a tube cavity of the core tube, the planar nut is rotatably arranged in the tube cavity of the core tube and comprises a planar thread part, the current transformer comprises an annular substrate, the annular substrate is arranged outside the crimping elements, an installation screw hole is formed in at least one of the crimping elements, and a temperature sensing device is arranged in the installation screw hole. The three-phase zero sequence current transformer has a function of monitoring temperature in real time.
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 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 three-phase zero sequence electricity being easily installed location and there is real time temperature control function
Current transformer.
The technical scheme realizing the object of the invention is: a kind of three-phase zero sequence current mutual inductor, including a core pipe, a casing pressure
Claw assembly, a plane nut, a current transformer and three crimps；Each crimp is provided with pressing plate portion and anticreep connects
Portion；Each crimp is arranged on core pipe by anticreep connecting portion is dismountable, and pressing plate portion is positioned at outside core pipe；On the tube wall of core pipe
It is provided with three spacing slide openings of radial direction；Paw assembly includes three paws for forming three clamp holes with crimp combination；Respectively
Paw includes top plate portion, from the guide runner portion of the inwardly projecting formation of the inwall of top plate portion be arranged on driving guide runner portion
Dynamic threaded portion；Top plate portion is positioned at outside core pipe, and the pressing plate portion clamping of top plate portion and a corresponding crimp forms one and is used for pressing from both sides
The clamp hole of tight electric power cable；Described clamp hole is provided with the thread groove for increasing grip；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；Plane nut rotation is arranged on core pipe pipe
In chamber；Plane nut includes driving threaded portion to engage the flat thread portion of adaptation with paw；Current transformer includes annular matrix,
Annular matrix is positioned at the outside of crimp；The most spacing slide opening be positioned at core pipe axially on middle part, radially the radial direction of spacing hole is cut
Face shape is I-shaped, and the radial cross-sectional shape in guide runner portion is adaptive with radial direction spacing hole I-shaped；Top plate portion is along core
Managing axially extending, pressing plate portion is axially extending along core pipe；It is provided with vertically on the periphery wall of core pipe for installing location crimp
Anticreep chute, anticreep chute includes two mounting grooves；Anticreep connecting portion is protrude inwardly from formation from pressing plate portion two side ends two
Post plate；Each post plate is arranged in a corresponding mounting groove；At least one crimp is provided with the installation spiral shell of built-in temperature sensing device
Hole；Temperature sensing device include having the metal shell of storage tank, the temperature sensor being arranged in storage tank, for by temperature
Spring that sensor is crimped in storage tank and the screwed pipe plug for limit spring；
Metal shell is provided with heat conduction boss close to one end of core tube hub axis, and metal shell is away from one end of core tube hub axis
It is provided with interior hexagonal and twists groove；The periphery wall of metal shell is provided with the external screw thread adaptive with installation screw, the internal perisporium of storage tank
It is provided with internal threaded regions；Temperature sensor includes the heat-conducting block using heat conductive insulating elastomeric material to make, is arranged in heat-conducting block
U-shaped thermo-sensitive resistor, be arranged on heat-conducting block two connect electric mortiser post；Heat-conducting block back and forth can be slided in the storage tank of metal shell
Dynamic；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 and protrude and be arranged on and lead
On the hot block other end away from core tube hub axis；Heat-conducting block is away from the outer wall of the other end of core tube hub axis and storage tank
Enclosing formation cannelure between internal perisporium, spring is positioned in this cannelure and is set in heat-conducting block away from the one of core tube hub axis
On end；Screwed pipe plug is provided with external screw thread district close to the periphery wall of one end of core tube hub axis, this external screw thread district and metal-back
The internal threaded regions of body is adaptive；Screwed pipe plug is provided with outer-hexagonal away from the periphery wall of one end of core tube hub axis and twists portion；Spiral shell
The center of pipe plug is provided with tube chamber；Screwed pipe plug is fixedly installed in cannelure by its external screw thread district；Spring is close to core pipe
One end of central axis is connected on heat-conducting block, and spring is connected on screwed pipe plug away from the other end of core tube hub axis；Lead
Two on hot block connect in the tube chamber that electric mortiser post is positioned at screwed pipe plug.
The present invention has positive effect: (1) present invention compares with by traditional bolt assembly clamping electric power cable, can
To apply bigger pressure, and there is excellent anti-loosening effect, the reliability of long-term work is effectively ensured.(2) present invention
Zero sequence current mutual inductor owing to carrying press claw type retaining mechanism, can directly be fixedly installed on cable, it is not necessary to reserved install
Position, it is easy to installing, and have preferable anti-loosening effect, firm intensity is relatively high and stable reliably.(3) crimp due at least one
Part is provided with the installation screw of built-in temperature sensing device, 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 perspective view when another angle is observed of the zero sequence current mutual inductor shown in Fig. 1；
Fig. 3 is a kind of front view of zero sequence current mutual inductor shown in Fig. 1；
Fig. 4 is that shown in Fig. 1, the one of zero sequence current mutual inductor partly cuts open structural representation；
Fig. 5 is a kind of perspective view when removing current transformer of the zero sequence current mutual inductor shown in Fig. 1；
Fig. 6 is a kind of perspective view when another angle is observed of the part zero sequence current mutual inductor shown in Fig. 5；
Fig. 7 is a kind of front view of part zero sequence current mutual inductor shown in Fig. 5；
Fig. 8 is that shown in Fig. 5, the one of part zero sequence current mutual inductor partly cuts open structural representation；
Fig. 9 is a kind of explosive view of part zero sequence current mutual inductor shown in Fig. 5；
Figure 10 is a kind of explosive view when another angle is observed of the part zero sequence current mutual inductor shown in Fig. 5；
Figure 11 is that the one of the second structure of the present invention partly cuts open structural representation；
Figure 12 is the close-up schematic view in Figure 11 at B；
Figure 13 is that one when removing current transformer of the zero sequence current mutual inductor shown in Figure 11 partly cuts open structural representation.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of power circuit connecting clip, as shown in Fig. 1 to Figure 10, including a core pipe 2, a set of paw assembly
3,4, current transformer 9 of a plane nut and three crimps 1.
The tube wall of core pipe is provided with three 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.
Each crimp is provided with pressing plate portion 11 and anticreep connecting portion 12；Crimp is arranged on by anticreep connecting portion is dismountable
On core pipe；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
Shape；Anticreep connecting portion is two the post plates protruding inwardly from formation from pressing plate portion two side ends, and the radial cross-sectional shape of each post plate is L
Shape；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 anti-of crimp
De-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 pacify
The fixing crimp of dress；Three draw-in grooves are such as set on the periphery wall of core pipe, each pressing plate arrange the clamping protruded inwardly from and props up
Dagger or clamping gripper shoe, directly snap in each clamping support column or clamping gripper shoe in a corresponding draw-in groove, also can prevent card
Fitting 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.
Paw assembly includes three paws 5 for forming clamp hole with crimp combination；Each paw include top plate 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 53 being arranged on guide runner portion；Top
Plate portion is axially extending along core pipe, and guide runner portion radially extends along core pipe；The outer wall of each paw top plate portion is provided with arc clip slot
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 inserts
Enter 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 in radially limit
Under the guide and limit effect of position slide opening, the radial direction along core pipe reciprocatingly slides；The radial cross-sectional shape in each guide runner portion is and radial direction
Adaptive I-shaped of spacing hole.
The arcuate groove in a corresponding crimp pressing plate portion is just arranged by the arc clip slot of each paw top plate portion, this arc clip slot
Form a clamp hole 6 with this arcuate groove clamping, described clamp hole is provided with the thread groove for increasing grip；Each clamp hole is used
In one electric power cable of clamping.The present embodiment forms three clamp holes altogether, for three electric power cables of clamping.At concrete practice
In, the size of each crimp can be different, and the distance between arcuate groove and the core tube wall in the most each pressing plate portion is different, thus can
The clamp hole varied in size with formation, for clamping the cable of different thicknesses.
Plane nut is arranged in core pipe tube chamber, and keeps off between platform in the driving threaded portion of each paw and core pipe；Plane
Nut includes driving threaded portion engage the flat thread portion 41 of adaptation and be positioned at the fastening of plane nut center with each paw
Portion 42, plane nut adjoins the flat thread portion that arranges on a side of paw assembly, another side of plane nut and core pipe gear
Platform slides adjacent；The periphery wall of plane nut and core inside pipe wall slide adjacent；Flat thread portion is annular, and flat thread sets in portion
There is archimedean spiral groove, the thread groove that driving threaded portion is provided with and this archimedean spiral groove is adaptive of paw assembly, respectively
Threaded portion is driven to be arranged on a side of guide runner portion, place adjacent flat nut.
The fastening part of the present embodiment midplane nut is interior hexagonal shape fastener hole or interior hexagonal shape binding groove, and it twists operation
Use inner hexagon spanner；In concrete practice, described fastening part just can use other shape, the most square or in-line or Flos Mume
Shape, all can select.
Current transformer 9 includes annular matrix 91 and intelligent control module 92, and intelligent control module can include wireless receipts
Bill unit, when having leakage current in three electric power cables, annular matrix will induce secondary current, and intelligent control module passes through
Wireless transmit/receive units sends distance host to this secondary current information；Annular matrix and core pipe are arranged concentrically, circular base position
Outside in crimp；Intelligent control module is arranged on and is enclosed formed by annular matrix inwall, core tube wall and crimp outer wall
Region in, thus make full use of space, be conducive to overall small-sized and integrated.
Plane nut, in reciprocating rotation, drives its flat thread portion reciprocating rotation, and then by engaging adaptation
Threaded portion is driven to drive each paw, due to each paw footpath only along core pipe under the guide and limit effect of radially spacing slide opening
To moving back and forth so that the move mode of each paw be close to each other towards core tube hub or away from, thus unclamp or press from both sides
Tightly it is positioned at the electric power cable in each 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.The present embodiment is by sliding or crimping side due to crimp
Formula is arranged on core pipe, can first cable be placed in the arc clip slot of each paw, more corresponding crimp is loaded corresponding
In anticreep chute, corresponding electric power cable can be placed in clamp hole；This structure makes to clamp the operation letter of electric power cable
Easy row.
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 Figure 11 to Figure 13, in the present embodiment
Current transformer 9 includes toroidal inductive body 91 and intelligent control module 92；The monnolithic case of intelligent control module is also annular；
Toroidal inductive body 91 and intelligent control module 92 are set on the periphery wall of crimp side by side.
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. a three-phase zero sequence current mutual inductor, it is characterised in that: include a core pipe, a set of paw assembly, a plane spiral shell
Mother, a current transformer and three crimps；Each crimp is provided with pressing plate portion and anticreep connecting portion；Each crimp passes through anticreep
Connecting portion is dismountable to be arranged on core pipe, and pressing plate portion is positioned at outside core pipe；The tube wall of core pipe is provided with three spacing cunnings of radial direction
Hole；Paw assembly includes three paws for forming three clamp holes with crimp combination；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；
Described clamp hole is provided with the thread groove for increasing grip；Guide runner portion inserts a corresponding spacing slide opening of radial direction on core pipe
In, drive threaded portion to stretch in the tube chamber of core pipe；Plane nut rotation is arranged in core pipe tube chamber；Plane nut includes and pressure
Pawl drives the flat thread portion that threaded portion engagement is adaptive；Current transformer includes that annular matrix, annular matrix are positioned at crimp
Outside；The most spacing slide opening be positioned at core pipe axially on middle part, radially the radial cross-sectional shape of spacing hole is I-shaped, guides sliding
The radial cross-sectional shape in block portion is adaptive with radial direction spacing hole I-shaped；Top plate portion is axially extending along core pipe, and pressing plate portion is along core
Manage axially extending；Being provided with the anticreep chute for installing location crimp on the periphery wall of core pipe vertically, anticreep chute includes
Two mounting grooves；Anticreep connecting portion is two the post plates protruding inwardly from formation from pressing plate portion two side ends；Each post plate is arranged on accordingly
In one mounting groove；At least one crimp is provided with the installation screw of built-in temperature sensing device；Temperature sensing device includes tool
Have the metal shell of storage tank, the temperature sensor being arranged in storage tank, for temperature sensor is crimped in storage tank
Spring and for the screwed pipe plug of limit spring；
Metal shell is provided with heat conduction boss close to one end of core tube hub axis, and metal shell is away from one end of core tube hub axis
It is provided with interior hexagonal and twists groove；The periphery wall of metal shell is provided with the external screw thread adaptive with installation screw, the internal perisporium of storage tank
It is provided with internal threaded regions；Temperature sensor includes the heat-conducting block using heat conductive insulating elastomeric material to make, is arranged in heat-conducting block
U-shaped thermo-sensitive resistor, be arranged on heat-conducting block two connect electric mortiser post；Heat-conducting block back and forth can be slided in the storage tank of metal shell
Dynamic；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 and protrude and be arranged on and lead
On the hot block other end away from core tube hub axis；Heat-conducting block is away from the outer wall of the other end of core tube hub axis and storage tank
Enclosing formation cannelure between internal perisporium, spring is positioned in this cannelure and is set in heat-conducting block away from the one of core tube hub axis
On end；Screwed pipe plug is provided with external screw thread district close to the periphery wall of one end of core tube hub axis, this external screw thread district and metal-back
The internal threaded regions of body is adaptive；Screwed pipe plug is provided with outer-hexagonal away from the periphery wall of one end of core tube hub axis and twists portion；Spiral shell
The center of pipe plug is provided with tube chamber；Screwed pipe plug is fixedly installed in cannelure by its external screw thread district；Spring is close to core pipe
One end of central axis is connected on heat-conducting block, and spring is connected on screwed pipe plug away from the other end of core tube hub axis；Lead
Two on hot block connect in the tube chamber that electric mortiser post is positioned at screwed pipe plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610286123.5A CN105845352A (en) | 2016-05-02 | 2016-05-02 | Three-phase zero sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610286123.5A CN105845352A (en) | 2016-05-02 | 2016-05-02 | Three-phase zero sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105845352A true CN105845352A (en) | 2016-08-10 |
Family
ID=56591097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610286123.5A Withdrawn CN105845352A (en) | 2016-05-02 | 2016-05-02 | Three-phase zero sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105845352A (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 |
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| 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 CN201610286123.5A patent/CN105845352A/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 |
| CN2793486Y (en) * | 2005-03-28 | 2006-07-05 | 郑春开 | Clasp cable device |
| 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 |
|---|---|---|
| CN105845418A (en) | Intelligent zero-sequence current transformer | |
| CN105845352A (en) | Three-phase zero sequence current transformer | |
| CN105869843A (en) | Zero-sequence current transformer | |
| CN105845353A (en) | High-voltage zero sequence current transformer | |
| CN105845358A (en) | Three-phase zero sequence current transformer | |
| CN105845354A (en) | High-voltage zero sequence current transformer | |
| CN106057456A (en) | Three-phase zero-sequence current transformer | |
| CN105845415A (en) | Medium- and high-voltage zero sequence current transformer | |
| CN105845336A (en) | Three-phase power zero-sequence current transformer | |
| CN105845356A (en) | Three-phase high-voltage zero sequence current transformer | |
| CN105845351A (en) | Medium- and high-voltage zero sequence current transformer | |
| CN106057455A (en) | Three-phase high-voltage zero-sequence current transformer | |
| CN105845355A (en) | Medium- and high-voltage zero sequence current transformer | |
| CN105845346A (en) | Three-phase zero-sequence current transformer | |
| CN105845347A (en) | High-voltage zero-sequence current transformer | |
| CN106057410A (en) | Medium-high voltage zero-sequence current transformer | |
| CN105845357A (en) | Three-phase high-voltage zero sequence current transformer | |
| CN105869864A (en) | High-voltage zero sequence current transformer | |
| CN105845345A (en) | Three-phase high-voltage zero-sequence current transformer | |
| CN105845414A (en) | Zero sequence current transformer | |
| CN105869869A (en) | Intelligent middle-high voltage zero-sequence current transformer | |
| CN105845360A (en) | Zero-sequence current transformer | |
| CN105845350A (en) | Intelligent middle-high voltage zero-sequence current transformer | |
| CN105845412A (en) | Intelligent zero-sequence current transformer | |
| CN105845338A (en) | Easy-to-install 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: 20160810 |
|
| WW01 | Invention patent application withdrawn after publication |