CN105845336A - Three-phase power zero-sequence current transformer - Google Patents
Three-phase power zero-sequence current transformer Download PDFInfo
- Publication number
- CN105845336A CN105845336A CN201610282124.2A CN201610282124A CN105845336A CN 105845336 A CN105845336 A CN 105845336A CN 201610282124 A CN201610282124 A CN 201610282124A CN 105845336 A CN105845336 A CN 105845336A
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- Prior art keywords
- core
- heat
- core tube
- conducting block
- hub axis
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Classifications
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- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a three-phase power zero-sequence current transformer, which comprises a core tube, a current transformer body, a flat nut, two sets of press claw components and six crimping parts, wherein six radial limiting slide holes are formed in the tube wall of the core tube; each crimping part is provided with a press plate part and an anti-drop connection part; the crimping parts are detachably arranged on the core tube through the anti-drop connection parts respectively; each set of press claw components comprise three press claws; each press claw comprises a top plate part, a guide slide block part and a drive thread part; each guide slide block part is inserted into the corresponding radial limiting slide hole; the drive thread parts extend into a tube cavity of the core tube; the flat nut is rotationally arranged in the tube cavity of the core tube; plane thread parts are arranged at two side ends, along the axial direction of the core tube, of the flat nut respectively; each plane thread part is meshed and matched with the drive thread parts of the press claws in one corresponding set of press claw components; the current transformer body comprises an annular base body; the annular base body is located at the outer sides of the crimping parts; and a mounting screw hole of a built-in temperature sensing device is formed in at least one crimping part. The three-phase power zero-sequence 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 three-phase power 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 power zero being easily installed location and there is real time temperature control function
Sequence current transformer.
The technical scheme realizing the object of the invention is: a kind of three-phase power zero sequence current mutual inductor, including a core pipe, one
Individual current transformer, plane nut, two casing pressure claw assemblies and six crimps；The tube wall of core pipe is provided with six radially limits
Position slide opening；Each crimp is provided with pressing plate portion and anticreep connecting portion；Crimp is arranged on core pipe by anticreep connecting portion is dismountable
On, pressing plate portion is positioned at outside core pipe；Each casing pressure claw assembly includes three paws；Paw includes top plate portion, from the inwall of top plate portion
The guide runner portion of inwardly projecting formation 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
Insert on core pipe in a corresponding spacing slide opening of radial direction, drive threaded portion to stretch in the tube chamber of core pipe；Plane nut rotation sets
Put in core pipe tube chamber；Plane nut along core pipe axially on two side ends be respectively provided with a flat thread portion；Each flat thread portion
With the driving threaded portion engagement adaptation of each paw in corresponding a set of paw assembly；Current transformer includes annular matrix, shape matrix
It is positioned at the outside of crimp；At least one crimp is provided with the installation screw of built-in temperature sensing device；Temperature sensing device bag
Include and there is the metal shell of storage tank, the temperature sensor being arranged in storage tank, accommodating for temperature sensor being crimped on
Spring in groove and the screwed pipe plug 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.
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 when removing current transformer of the zero sequence current mutual inductor shown in Fig. 1；
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 three-phase power zero sequence current mutual inductor, as shown in Fig. 1 to Fig. 7, including a core pipe 2, two casing pressure
Claw assembly 3, two set crimp assemblies, a plane nut 4 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.
In the present embodiment, six radial direction spacing holes are divided into two groups, and the radially spacing holes of three in each group are used for and corresponding a set of paw group
Part is adaptive.
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
Run through core pipe；Each anticreep chute includes that two radial sections are the mounting grooves 241 of L-shaped；In the present embodiment, two adjacent anticreeps
Chute is oppositely arranged；Each mounting groove and a corresponding post plate are adaptive；The anticreep connecting portion of each crimp along core pipe axial direction from
One side of anticreep chute slips in a corresponding anticreep chute；In concrete practice, anticreep connecting portion can select other
Shape, as long as making the anticreep connecting portion of crimp can not remove along core caliber to from anticreep chute；At concrete practice
In, it is possible to select the mode of clamping that fixing crimp is installed；Multiple draw-in groove is such as set on the periphery wall of core pipe, at each pressing plate
Clamping support column that upper setting protrudes inwardly from or clamping gripper shoe, directly snap in each clamping support column or clamping gripper shoe accordingly
In one draw-in groove, also can prevent shackle member from removing core pipe along core pipe radial direction, this structure is also feasible.
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.
The inwall of a corresponding crimp is just arranged by each radially spacing slide opening.
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, each clamp hole for clamping one electric lines of force
Cable；The present embodiment forms three clamp holes, altogether three electric power cables of clamping altogether.Current transformer 9 includes annular matrix 91 and intelligence
Energy control module 92, intelligent control module can include wireless transmit/receive units, when three electric power cables have leakage current, ring
Shape matrix will induce secondary current, and intelligent control module is sent to this secondary current information remotely by wireless transmit/receive units
Main frame；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 annular
Matrix inwall, core tube wall and crimp outer wall enclose in the region of formation, thus make full use of space, are conducive to the little of entirety
Type and integration.
Plane nut rotation is arranged in core pipe tube chamber；The periphery wall of plane nut and core inside pipe wall slide adjacent, plane
Nut along core pipe axially on two side ends be respectively provided with a flat thread portion 41, the center of plane nut is provided with fastening part 42；
The driving threaded portion engagement adaptation of each paw in each flat thread portion and corresponding a set of paw assembly；Driving in each casing pressure claw assembly
Dynamic threaded portion all stretches in core pipe tube chamber, and the driving threaded portion in each casing pressure claw assembly is all connected to a corresponding plane spiral shell
In stricture of vagina portion；Each flat thread portion is annular, and flat thread portion is provided with archimedean spiral groove；The driving screw thread of each paw assembly
The thread groove that portion is provided with and this archimedean spiral groove is adaptive, it is adjacent flat that each driving threaded portion is arranged on guide runner portion, place
One side of face nut.
In the present embodiment, the direction of rotation in the flat thread portion of plane nut one side is forward, the plane of another side
The direction of rotation of threaded portion is reverse, and the direction of rotation driving screw thread on each paw is and the flat thread adjacent with this paw
The direction that portion is adaptive.When this structure makes plane nut rotation, by the two of its two side ends flat thread portions, synchronize to drive
Two casing pressure claw assemblies realize clamping or unclamp the cable being positioned in clamp hole.
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.
In the present embodiment, plane nut, when reciprocating rotation, drives two flat thread portion reciprocating rotation, and then passes through
The driving threaded portion adaptive to the engagement of each flat thread portion drives each paw in corresponding a set of paw assembly to move, due to each paw
Under the guide and limit effect of radially spacing slide opening, the radial direction only along core pipe moves back and forth, so that each casing pressure claw assembly
The move mode of middle paw be close to each other towards core tube hub or away from, thus unclamp or clamp the electricity being positioned in each clamp hole
Line of force cable.The present embodiment achieves and synchronizes to drive each paw in two casing pressure claw assemblies be clamped and unclamp with a plane nut
The action of cable.
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.
(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. a three-phase power zero sequence current mutual inductor, it is characterised in that: include a core pipe, current transformer, one
Plane nut, two casing pressure claw assemblies and six crimps；The tube wall of core pipe is provided with six spacing slide openings of radial direction；Each crimp sets
There are pressing plate portion and anticreep connecting portion；Crimp is arranged on core pipe by anticreep connecting portion is dismountable, and pressing plate portion is positioned at core pipe
Outside；Each casing pressure claw assembly includes three paws；Paw includes top plate portion, guiding from the inwardly projecting formation of the inwall of top plate portion
Slide section and the driving threaded portion being arranged in guide runner portion；Top plate portion is positioned at outside core pipe, top plate portion and a corresponding pressure
The pressing plate portion clamping of fitting forms one for the clamp hole clamping electric power cable；Guide runner portion inserts on core pipe corresponding one
In the most spacing slide opening, threaded portion is driven to stretch in the tube chamber of core pipe；Plane nut rotation is arranged in core pipe tube chamber；Plane
Nut along core pipe axially on two side ends be respectively provided with a flat thread portion；In each flat thread portion and corresponding a set of paw assembly
The driving threaded portion engagement adaptation of each paw；Current transformer includes that annular matrix, shape matrix are positioned at the outside of crimp；At least
One crimp is provided with the installation screw of built-in temperature sensing device；Temperature sensing device includes the metal-back with storage tank
Body, the temperature sensor being arranged in storage tank, for the spring that temperature sensor is crimped in storage tank and be used for limiting
The screwed pipe plug of position 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 |
|---|---|---|---|
| CN201610282124.2A CN105845336A (en) | 2016-05-02 | 2016-05-02 | Three-phase power zero-sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610282124.2A CN105845336A (en) | 2016-05-02 | 2016-05-02 | Three-phase power zero-sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105845336A true CN105845336A (en) | 2016-08-10 |
Family
ID=56590491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610282124.2A Withdrawn CN105845336A (en) | 2016-05-02 | 2016-05-02 | Three-phase power zero-sequence current transformer |
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| CN (1) | CN105845336A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006546A (en) * | 2019-04-12 | 2019-07-12 | 李晨阳 | A kind of special utility intelligent thermometer detecting hydraulic elevator |
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| 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 |
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| CN105355406A (en) * | 2015-11-24 | 2016-02-24 | 广东电网有限责任公司电力科学研究院 | Opening current transformer capable of being installed in powered-on mode |
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2016
- 2016-05-02 CN CN201610282124.2A patent/CN105845336A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN204276947U (en) * | 2014-12-01 | 2015-04-22 | 温岭市深澳机床厂(普通合伙) | Scroll chuck |
| CN105355406A (en) * | 2015-11-24 | 2016-02-24 | 广东电网有限责任公司电力科学研究院 | Opening current transformer capable of being installed in powered-on mode |
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| CN110006546A (en) * | 2019-04-12 | 2019-07-12 | 李晨阳 | A kind of special utility intelligent thermometer detecting hydraulic elevator |
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