CN105869845A - High-voltage power zero-sequence current transformer for power transmission and distribution line - Google Patents
High-voltage power zero-sequence current transformer for power transmission and distribution line Download PDFInfo
- Publication number
- CN105869845A CN105869845A CN201610293910.2A CN201610293910A CN105869845A CN 105869845 A CN105869845 A CN 105869845A CN 201610293910 A CN201610293910 A CN 201610293910A CN 105869845 A CN105869845 A CN 105869845A
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- Prior art keywords
- base tube
- stem
- clamp
- heat
- conducting block
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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
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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
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device
-
- 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
Landscapes
- 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)
- Clamps And Clips (AREA)
Abstract
The invention discloses a high-voltage power zero-sequence current transformer for a power transmission and distribution line. The current transformer comprises a base tube, a stem, bolts, a current transformer body and a clamping plate assembly. The base tube comprises a tube pressing part and a sealing plate part, the sealing plate part is fixedly arranged relative to the tube pressing part, and the sealing plate part is provided with a limiting sliding hole and a threading hole. Crimping bosses are arranged on the inner wall of the tube pressing part. A conical crimping face is arranged on the outer peripheral wall of the stem. The clamping plate assembly comprises wire clamping plates, guide sliding tables are arranged on the inner walls of the wire clamping plates, guide sliding grooves are formed in the wire clamping plates, and the crimping bosses are provided with limiting sliding posts matched with the guide sliding grooves. Each wire clamping plate right corresponds to the corresponding crimping boss. The current transformer body comprises an annular induction body. Wire clamping holes are located in the porous cavity of the annular induction body. The bolts are rotated to push the wire clamping plates to move in the radial direction of the tube pressing part. The base tube is provided with an installation screw hole penetrating through the wall of the tube pressing part in the radial direction of the base tube. A temperature sensing device is fixedly arranged in the installation screw hole. The current transformer has the real-time temperature monitoring function.
Description
Technical field
The invention belongs to technical field of electric power, be specifically related to a kind of electric line high-tension electricity 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 generation of the telegram in reply stream of any node in circuit
Count and 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 sequence
The secondary side winding no signal output of 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 inductance
Produced by device, electric current is zero-sequence current.When protection mechanism receives this zero sequence current signal, can take according to electrical leakage quantity
Corresponding protection act.
Mostly the mounting means of existing zero sequence current mutual inductor is to use flange install fixing or use bonding mode to fix, and it is installed
Position is it is generally required to reserve, so that the application of zero sequence current mutual inductor is by more restriction.
Summary of the invention
It is an object of the invention to provide a kind of electric line use being easily installed location and there is real time temperature control function
High-tension electricity zero sequence current mutual inductor.
The technical scheme realizing the object of the invention is: a kind of electric line high-tension electricity zero sequence current mutual inductor, including
Base tube, stem stem, bolt, current transformer and cleat assembly；Base tube includes pressure pipe portion and shrouding portion；Shrouding portion and pressure pipe
Portion is relatively fixed setting；Shrouding portion is provided with spacing slide opening and through wires hole；It is convex that the inwall in pressure pipe portion is provided with at least three crimping
Platform；Stem stem be shaped as frustum, the periphery wall of stem stem is axially arranged with at least three jacking sliding groove and work along pressure pipe portion
Taper electrolysis for each jacking sliding groove bottom wall；The center of stem stem is axially arranged with centre bore along pressure pipe portion；Cleat assembly bag
Include at least three clamp；The inwall of clamp is provided with the guiding slide unit adaptive with jacking sliding groove；Each clamp is provided with leads
To chute；Each crimping boss is provided with the spacing traveller by adaptive with guide chute thus spacing clamp moving direction；
A corresponding crimping boss is just arranged by clamp, and each clamp and a corresponding crimping boss clamping form a clamp
Hole；Each through wires hole in shrouding portion connects with a corresponding clamp hole；Bolt includes the body of rod, is arranged on the tight of body of rod one end
Gu portion, the male threaded joint being arranged on body of rod periphery wall and and the nut of male threaded joint adaptation；Bolt tight
Gu portion is positioned at the stem stem side away from shrouding portion, the body of rod of bolt sequentially passes through the centre bore of stem stem and the spacing cunning in shrouding portion
Hole, nut is twisted solid on the male threaded joint of bolt stretching out shrouding portion；Current transformer includes toroidal inductive body；
Each clamp hole is respectively positioned in the vestibule of toroidal inductive body；Swivel bolt pulls stem stem to move towards the direction close to shrouding portion
Dynamic；Stem stem pushes the guiding slide unit of each clamp by the taper electrolysis in jacking sliding groove, and then promotes each clamp to make
It is moved radially outward along pressure pipe portion, thus clamping is positioned at the electric power cable in clamp hole；Base tube is provided with along base tube radially
Run through the installation screw of pressure pipe portion wall body；This installation screw is fixed with temperature sensing device；Temperature sensing device includes
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 bottom wall and the screwed pipe plug for limit spring；Temperature sensor includes using heat conductive insulating elastomeric material system
The heat-conducting block become, the thermo-sensitive resistor being arranged in heat-conducting block, be arranged on heat-conducting block two connect electric mortiser post；Heat-conducting block can
The storage tank of metal shell reciprocatingly slides；Heat-conducting block is away from the external diameter of the other end of base tube central 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 base tube central axis
On one end；The center of screwed pipe plug is provided with tube chamber；Screwed pipe plug is fixedly installed in cannelure by its external screw thread district；
Spring is connected on heat-conducting block close to one end of base tube central axis, and spring is connected to away from the other end of base tube central axis
On screwed pipe plug；Two on heat-conducting block connect in the tube chamber that electric mortiser post is positioned at screwed pipe plug.
In such scheme, heat-conducting block is connected on the diapire of storage tank close to one end of base tube central axis；Two connect electric mortiser
Post protrudes and is arranged on the heat-conducting block other end away from base tube central axis.
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,
Need not reserved installation position, it is easy to install.(2) structure more compact and reasonable；Stem stem and bolt connect threadably,
And making it clamp electric power cable by the taper electrolysis each clamp of crimping of jacking sliding groove, its operation is the most laborsaving.(3)
Under the engagement of anticreep chisel teeth and anticreep tooth locks, also there is preferable anti-loosening effect.(4) it is provided with edge due to base tube
Base tube extends radially through the installation screw of pressure pipe portion wall body, is fixed with temperature sensing device in installation screw；So the present invention
Also there is real time temperature control function.
Accompanying drawing explanation
Fig. 1 is that the one of the first structure of the present invention partly cuts open structural representation；
Fig. 2 is a kind of perspective view after zero sequence current mutual inductor shown in Fig. 1 removes current transformer；
Fig. 3 is a kind of perspective view when another angle is observed of the zero sequence current mutual inductor shown in Fig. 2；
Fig. 4 is that shown in Fig. 2, the one of zero sequence current mutual inductor faces structural representation；
Fig. 5 is the A-A sectional view of Fig. 4；
Fig. 6 is a kind of perspective view of base tube in zero sequence current mutual inductor shown in Fig. 2；
Fig. 7 is that shown in Fig. 6, the one of base tube partly cuts open structural representation；
Fig. 8 is a kind of explosive view of zero sequence current mutual inductor shown in Fig. 2；
Fig. 9 is a kind of explosive view when another angle is observed of the zero sequence current mutual inductor shown in Fig. 2；
Figure 10 is that the one of the second structure of the present invention partly cuts open structural representation；
Figure 11 is the close-up schematic view in Figure 10 at B；
Figure 12 is that the one of the third structure of the present invention partly cuts open structural representation.
Detailed description of the invention
(embodiment 1)
The present embodiment is a kind of electric line high-tension electricity zero sequence current mutual inductor, as shown in Fig. 1 to Fig. 9, including
Base tube 1, stem stem 2, bolt 3, current transformer 7 and cleat assembly 4；Described base tube 1, stem stem 2 and cleat assembly
4 all adopt and are made from an insulative material.
Base tube 1 includes pressure pipe portion 11 and is positioned at the shrouding portion 12 of one end, pressure pipe portion；The shape in pressure pipe portion is circular, pressure pipe
The inwall in portion is provided with crimping boss 13, and the inwall of crimping boss is provided with arcuate groove 14.Base tube is made into integration, crimping
Boss projects radially inwards formation from the inwall in pressure pipe portion, and crimping boss axially penetrates through in pressure pipe portion along pressure pipe portion
Wall.
In the present embodiment, pressure pipe portion is provided with four crimping boss, and these four crimping boss uniformly divide along the circumference in pressure pipe portion
Cloth is on the inwall in pressure pipe portion.
The two side of each crimping boss is provided with two spacing travellers 15 protruded towards center, pressure pipe portion, and spacing traveller is along pressure
Pipe portion is radially arranged.
Shrouding portion 12 is provided with through wires hole 16 and spacing slide opening 17；In the present embodiment, shrouding portion is provided with a spacing slide opening
With four through wires holes；Spacing slide opening is arranged on the center in shrouding portion, and through wires hole is uniformly arranged on the outer circumferential side of spacing hole.
Stem stem be shaped as frustum, the periphery wall of stem stem is axially arranged with along pressure pipe portion four jacking sliding grooves 21, respectively pushes up pressure
Chute is additionally provided with multiple anticreep chisel teeth 22；The center of stem stem is axially arranged with centre bore 23 along pressure pipe portion.Respectively push up pressure
The diapire of chute is as taper electrolysis 211.
Cleat assembly includes four clamps 41；The inwall of each clamp is provided with the guiding slide unit 411 adaptive with jacking sliding groove,
Guide axially arranged along pressure pipe portion of slide unit；The outer wall of each clamp is provided with arc clip slot 412, the both sides of each clamp
Guide chute 413 it is additionally provided with on wall；The spacing traveller of each crimping boss is positioned in a corresponding guide chute so that clamp
Plate moves along spacing traveller direction；In the present embodiment, each spacing traveller being radially arranged along pressure pipe portion, therefore clamp can only
Radial direction along pressure pipe portion moves back and forth.
In the present embodiment, the two side of each clamp is axially respectively arranged at the two ends with a positive stop lug boss 417, these two limits
Position boss clamping forms described guide chute 413.
In the present embodiment, each slide unit that guides has the taper stress surface adaptive with stem stem jacking sliding groove bottom wall, this taper stress
Face substantially also serves as the inwall 414 of clamp；When the guiding slide unit of each clamp is positioned in stem stem jacking sliding groove, folder
The outer wall 415 of line plate is parallel with the inwall 131 of a corresponding crimping boss；Each clamp is just to a corresponding crimping boss
Arranging, each arc clip slot and a corresponding arcuate groove clamping form a clamp hole 5, and the present embodiment forms four clamps altogether
Hole；A corresponding clamp hole is the most just arranged by each through wires hole in shrouding portion.
Stem stem is under the spacing mating reaction guiding slide unit of its jacking sliding groove and clamp, it is impossible to rotate in pressure pipe portion,
Only along moving axially of pressure pipe portion.
The inwall 414 of each conical outer wall guiding slide unit namely clamp is provided with multiple anticreep tooth 416, and each anticreep tooth is used
Engage in the anticreep chisel teeth with stem stem, anti-skidding anti-retrogression.
Current transformer includes toroidal inductive body 71 and intelligent control module 72；In the present embodiment, intelligent control module
72 make and have the ring-type of onesize vestibule with toroidal inductive body, and annular perception sensing body and intelligent control module are also
Row arranges combination and forms annular, on the overall sheathed outer wall being fixed on base tube of current transformer.In concrete practice, as long as
All clamp holes are positioned in the vestibule of toroidal inductive body, namely have only to so that cable passes toroidal inductive originally
The vestibule of body.
The present embodiment has four clamp holes, but in concrete practice, can only three electric power cables of clamping, unnecessary one
Clamp hole is standby or is used for clamping other auxiliary wire rod；During three electric power cables of clamping, toroidal inductive body may be used for
Sensing zero sequence current signal, finds leak current fault in time, now can use as a zero sequence current mutual inductor.
In concrete practice, it is possible to the present embodiment is made the structure only with three clamp holes.
Intelligent control module includes wireless transmit/receive units, and intelligent control module passes through wireless transmit/receive units toroidal inductive body
The current signal sensed sends distance host to, to realize accurate long-range no worker monitor.
Bolt includes the body of rod 31, the fastening part 32 being arranged on body of rod one end, the external screw thread that is arranged on body of rod periphery wall even
Connect portion 33 and and the nut 34 of male threaded joint adaptation；The fastening position of bolt in stem stem away from the side in shrouding portion,
The body of rod of bolt sequentially passes through the centre bore of stem stem and the spacing slide opening in shrouding portion, until male threaded joint stretches out shrouding
Portion, nut is twisted solid on the male threaded joint of bolt stretching out shrouding portion.
The external diameter of bolt fastening part is more than the aperture of stem stem centre bore, and the external diameter of nut is more than the hole of the spacing slide opening in shrouding portion
Footpath.
Swivel bolt pulls stem stem to move towards the direction close to shrouding portion；Stem stem is by the taper electrolysis in jacking sliding groove
Push the guiding slide unit of each clamp, and then promote each clamp to make its being moved radially outward along pressure pipe portion, thus clamp
It is positioned at the electric power cable in clamp hole.
The present embodiment, in order to promote chuck strength, is also provided with multiple puncture 6 in each arcuate groove and arc clip slot；Concrete next
Saying, each puncture is along the radially protruding in core pipe portion.
In the present embodiment, each paw is the integral piece made by injection mo(u)lding, and each puncture is made when injection mo(u)lding；?
In concrete practice, puncture may be used without alternate manner and makes；In each arcuate groove, such as it is provided with multiple installation draw-in groove, then
It is inlaid in a corresponding installation draw-in groove adopting the puncture sheet being made from an insulative material；Puncture sheet and include installation portion and thorn sword
Portion, installation portion is inlaid in installation draw-in groove, and thorn blade then exposes installation draw-in groove and forms puncture.In concrete practice, also may be used
To use in the way of being threaded in each arc clip slot and arcuate groove, also can improving clamping sigma compactness energy.
In concrete practice, it is also possible to use in the mode being threaded in each arc clip slot and arcuate groove, also can promote
Clamping performance.
The present embodiment has following Advantageous Effects: (1) operation is the most laborsaving, has preferable anti-loosening effect.
(embodiment 2)
The present embodiment and above-described embodiment 1 are essentially identical, and difference is: as shown in Figure 10 and Figure 11, base tube 1
It is provided with the installation screw 18 extending radially through pressure pipe portion 11 wall body along base tube；This installation screw is fixed with temperature sensing dress
Put 8；
Temperature sensing device includes the metal shell 81 with storage tank 811 that metal material makes, is arranged in storage tank
Temperature sensor 82, for temperature sensor is crimped on storage tank diapire spring 83, be used for limit spring
Screwed pipe plug 84；
Metal shell is provided with as puncturing the heat conduction boss 813 used, metal-back close to one end 812 of base tube central axis
Body is provided with interior hexagonal away from one end 814 of base tube central axis and twists groove 815；The periphery wall of metal shell is provided with and pacifies
The external screw thread 816 that dress screw is adaptive, the internal perisporium of storage tank is provided with internal threaded regions 817；Heat conduction boss is from metal-back
Body protrudes, close to one end 812 of base tube central axis, the sharp tooth boss formed；
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 in the storage tank of metal shell
Reciprocatingly slide；Heat-conducting block is connected on the diapire of storage tank close to one end of base tube central axis；Two connect electric mortiser post and protrude
It is arranged on the heat-conducting block other end away from base tube central axis；
Heat-conducting block is away from enclosing formation cannelure between external diameter and the internal perisporium of storage tank of the other end of base tube central axis
100, spring is positioned in this cannelure and is set on heat-conducting block one end away from base tube central axis；
Screwed pipe plug is provided with external screw thread district 841 close to the periphery wall of one end of base tube central axis, this external screw thread district and gold
The internal threaded regions 817 belonging to housing is adaptive；Screwed pipe plug is provided with outer-hexagonal away from the periphery wall of one end of base tube central axis
Twist portion 842；The center of screwed pipe plug is provided with tube chamber 843；Screwed pipe plug is fixedly installed on ring by its external screw thread district
In shape groove；
Spring is connected on heat-conducting block close to one end of base tube central axis, and spring supports away from the other end of base tube central 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.
The internal perisporium of intelligent control module 72 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 the middle control circuit phase in temperature sensor and intelligent control module
Even.
This structure has the following advantages, owing to metal shell is easily deformed when extruding cable, extrusion temperature sensor
Heat-conducting block, if heat-conducting block does not has mobile space, then easily pressurized deformation damages；The present embodiment is by arranging spring, both
Heat-conducting block can be crimped on the diapire of metal shell storage tank so that it is can correctly predict cable and base tube pressure pipe portion connects
The real time temperature at place；Can also be when, after metal shell compressive deformation, reserving mobile space to heat-conducting block, thus prevent heat conduction
Block is by fail in compression；This structure has preferably Practical Performance.
In concrete practice, multiple installation screw and multiple temperature sensing device can be set on base tube, for each
Individual cable and the temperature with junction, base tube pressure pipe portion monitor in real time, thus realize the further intelligence that power network monitoring runs
Energyization.
(embodiment 3)
The present embodiment and embodiment 2 are essentially identical, and difference is: as shown in Figure 12, the bolt in the present embodiment
No longer including nut 34, the present embodiment is provided for adaptive with bolt male threaded joint in the spacing slide opening in shrouding portion
Internal threaded regions 171；The body of rod of bolt is spirally connected through the centre bore of stem stem, the male threaded joint of bolt and this internal threaded regions.
The present embodiment saves a nut, and structure more simplifies.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not to this
The restriction of the embodiment of 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 this
Belong to obvious change that the connotation of the present invention extended out a bit or variation still falls within protection scope of the present invention.
Claims (2)
1. an electric line high-tension electricity zero sequence current mutual inductor, it is characterised in that: include base tube, stem stem,
Bolt, current transformer and cleat assembly；Base tube includes pressure pipe portion and shrouding portion；Shrouding portion is relatively fixed with pressure pipe portion and sets
Put；Shrouding portion is provided with spacing slide opening and through wires hole；The inwall in pressure pipe portion is provided with at least three crimping boss；The shape of stem stem
Shape is frustum, the periphery wall of stem stem is axially arranged with at least three jacking sliding groove along pressure pipe portion and as each jacking sliding groove
The taper electrolysis of diapire；The center of stem stem is axially arranged with centre bore along pressure pipe portion；Cleat assembly includes that at least three is pressed from both sides
Line plate；The inwall of clamp is provided with the guiding slide unit adaptive with jacking sliding groove；Each clamp is provided with guide chute；Each pressure
Connect boss and be provided with the spacing traveller by adaptive with guide chute thus spacing clamp moving direction；Clamp is just to phase
Answering a crimping boss to arrange, each clamp and a corresponding crimping boss clamping form a clamp hole；In shrouding portion
Each through wires hole connects with a corresponding clamp hole；Bolt includes the body of rod, the fastening part being arranged on body of rod one end, is arranged on bar
Male threaded joint on external perisporium and and the nut of male threaded joint adaptation；The fastening position of bolt is remote in stem stem
From the side in shrouding portion, the body of rod of bolt sequentially passes through the centre bore of stem stem and the spacing slide opening in shrouding portion, and nut is twisted and admittedly existed
On the male threaded joint of the bolt stretching out shrouding portion；Current transformer includes toroidal inductive body；Each clamp hole is respectively positioned on
In the vestibule of toroidal inductive body；Swivel bolt pulls stem stem to move towards the direction close to shrouding portion；Stem stem is pressed by top
Taper electrolysis in chute pushes the guiding slide unit of each clamp, and then promotes each clamp to make it along the radial direction in pressure pipe portion
It is displaced outwardly, thus clamping is positioned at the electric power cable in clamp hole；Base tube is provided with and extends radially through pressure pipe portion wall body along base tube
Installation screw；This installation screw is fixed with temperature sensing device；Temperature sensing device includes the metal with storage tank
Housing, the temperature sensor being arranged in storage tank, for temperature sensor is crimped on the spring on storage tank diapire and
Screwed pipe plug for limit spring；Temperature sensor includes heat-conducting block, the setting using heat conductive insulating elastomeric material to make
Thermo-sensitive resistor in heat-conducting block, two be arranged on heat-conducting block connect electric mortiser post；Heat-conducting block can housing at metal shell
Groove reciprocatingly slides；Heat-conducting block encloses shape away between external diameter and the internal perisporium of storage tank of the other end of base tube central axis
Circularizing groove, spring is positioned in this cannelure and is set on heat-conducting block one end away from base tube central axis；Screwed pipe plug
Center be provided with tube chamber；Screwed pipe plug is fixedly installed in cannelure by its external screw thread district；Spring is close to base tube center
One end of axis is connected on heat-conducting block, and spring is connected on screwed pipe plug away from the other end of base tube central axis；Heat conduction
Two on block connect in the tube chamber that electric mortiser post is positioned at screwed pipe plug.
Electric line high-tension electricity zero sequence current mutual inductor the most according to claim 1, it is characterised in that:
Heat-conducting block is connected on the diapire of storage tank close to one end of base tube central axis；Two connect electric mortiser post protrusion and are arranged on heat conduction
On the block other end away from base tube central axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293910.2A CN105869845A (en) | 2016-05-02 | 2016-05-02 | High-voltage power zero-sequence current transformer for power transmission and distribution line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293910.2A CN105869845A (en) | 2016-05-02 | 2016-05-02 | High-voltage power zero-sequence current transformer for power transmission and distribution line |
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| Publication Number | Publication Date |
|---|---|
| CN105869845A true CN105869845A (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610293910.2A Pending CN105869845A (en) | 2016-05-02 | 2016-05-02 | High-voltage power zero-sequence current transformer for power transmission and distribution line |
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| JP5789038B1 (en) * | 2014-12-01 | 2015-10-07 | 恒和工業株式会社 | Electric wire connector |
| 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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| JP2603546B2 (en) * | 1988-12-16 | 1997-04-23 | アンプ インコーポレーテッド | Electrical connector |
| US5692930A (en) * | 1996-07-18 | 1997-12-02 | The Whitaker Corporation | Electrical distribution system connector |
| CN101419096A (en) * | 2008-12-12 | 2009-04-29 | 王涛 | Temperature sensor fixing structure on high-pressure electrified conductor and electrified installation tool thereof |
| JP5789038B1 (en) * | 2014-12-01 | 2015-10-07 | 恒和工業株式会社 | Electric wire connector |
| 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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