CN102013310B - User external current transformer of pole-mounted circuit breaker - Google Patents
User external current transformer of pole-mounted circuit breaker Download PDFInfo
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- CN102013310B CN102013310B CN200910187243XA CN200910187243A CN102013310B CN 102013310 B CN102013310 B CN 102013310B CN 200910187243X A CN200910187243X A CN 200910187243XA CN 200910187243 A CN200910187243 A CN 200910187243A CN 102013310 B CN102013310 B CN 102013310B
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Abstract
The invention relates to a user external current transformer of a pole-mounted circuit breaker, which comprises an iron core, a primary winding, a secondary winding, a primary wire incoming terminal, a primary wire outgoing terminal, a high-voltage insulator, a low-voltage insulator, an insulating column and a secondary lead metal protective sleeve and is in an integrated structure by forming through compound insulation with epoxy resin and silicone rubber, wherein the upper part of the high-voltage insulator is a cuboid, the lower part of the high-voltage insulator is in a shape of a column, the low-voltage insulator is in a shape of a horizontally arranged cylinder and penetrates through and is intersected with the high-voltage insulator, the secondary lead metal protective sleeve is in a shape of L, and threads are arranged at the end of the secondary lead metal protective sleeve. The invention has the advantages of multiple transformation ratios, large application range, convenience in installation, high standard coefficients, high dynamo-thermal stable current, accurate precision, stable insulation, long maintenance period and the like.
Description
Technical field
The present invention relates to electric power system high-tension measurement and protective device, specifically a kind of pole-mounted circuit breaker is used Outdoor Current Transformer.
Background technology
Instrument transformer is an equipment of measuring electric current, electric energy or relaying protection in the electric power system, and electric power system Current Transformer that pole-mounted circuit breaker makes mainly is that form is the dry type loop construction at present, is commonly called as the overcurrent coil; Promptly be not with winding one time; Have only secondary winding, it is inner to be satisfied with the circuit breaker casing, is set on bus; In use mainly there is following problem in it: 1) because be the single turn punching; Only be applicable to big current specification, product has been realized not high-acruracy survey and protection under the low current situation, moves unreliable, poor sensitivity; 2) because be loaded on box house, the bus of suit need be made insulation processing separately, has not only increased cabinet space, and has very big insulation hidden danger; 3) can only make the monotropic structure that compares; Its range of application just is restricted with respect to pole-mounted circuit breaker; After track remodelling or the system's increase-volume, just need to change circuit breaker or instrument transformer, increased a lot of material resources or investment in human resources; Having restricted the power system development needs greatly, also is the difficult problem that technological innovation of electric power system pole-mounted circuit breaker and house of correction need solve.
Summary of the invention
To the above-mentioned weak point that exists in the prior art, the technical problem that the present invention will solve provides a kind of polytropic ratio, applied range, high dynamic and thermal stability, the stable pole-mounted circuit breaker of insulation is used Outdoor Current Transformer.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of pole-mounted circuit breaker of the present invention is with the integral structure of Outdoor Current Transformer for adopting epoxy resin and silicon rubber compound inslation to form by iron core, winding, secondary winding, input terminal, outlet terminal, high voltage insulator, low-voltage insulation body, insulated column and a secondary lead wires metallic sheath; High voltage insulator top is the form of cylinder for the cuboid bottom; The low-voltage insulation body is the cylinder form of horizontal positioned, and low-voltage insulation body and high voltage insulator run through and intersect together; The secondary lead wires metallic sheath is L shaped shape, and its end has screw thread.
An input terminal and an outlet terminal are positioned at low-voltage insulation body axis end positions, and an input terminal is the straight plate shape that has installing hole, and an outlet terminal is the disc-shape that has open bore; The insulated column of sealing the secondary lead wires metallic sheath be positioned at the low-voltage insulation body under, and be evenly distributed with full skirt on it; The secondary lead wires metallic sheath is metal hollow tubular, and the secondary lead wires cable is therefrom drawn.
The present invention has following beneficial effect and advantage:
1. polytropic ratio, range of application are big: because the present invention adopts the version that has a winding; Can make very little electrorheological ratio; Realize accurate measurement and protection under the low current situation, and secondary winding can make three polytropic ratio structures, make the product range of application more extensive;
2. easy for installation, normalisation coefft is high: the present invention once passes in and out line terminals institute standardized designs form and terminal threaded secondary lead wires metallic sheath etc.; Can be well on machinery and electricly connect installation of high voltage bus and circuit breaker, be applicable to that the circuit breaker that opens circuit on the various posts is supporting;
3. high dynamic and thermal stability electric current, precision are accurate: adopt in the high voltage insulator of cuboid form enough spaces can guarantee that a winding that designs adopts and strengthen the line footpath; Make product have higher dynamic and thermal stability electric current, can effectively avoid system short-circuit and overcurrent to cause the too high and insulation damages of instrument transformer temperature rise; Secondary winding adopts the high-quality permeability magnetic material, and product is had than error performance, and metering protection precision is higher;
4. insulation is stable, maintenance period is long: the inner high-low pressure winding of the present invention periphery has enough insulation and the outer silicone insulation makes insulation more stable; And the even full skirt of insulated column periphery design distribution; Can effectively strengthen instrument transformer surface creepage distance; Prevent the generation of pollution flashover fault effectively, do not need periodic maintenance.
Description of drawings
Fig. 1 is an external structure front view of the present invention;
Fig. 2 is an external structure end view of the present invention;
Fig. 3 is an internal structure sketch map of the present invention.
Embodiment
Shown in Fig. 1～3; A kind of pole-mounted circuit breaker of the present invention is with the integral structure of Outdoor Current Transformer for adopting epoxy resin and silicon rubber compound inslation to form by iron core 1, winding 2, secondary winding 3, input terminal 4, outlet terminal 5, high voltage insulator 6, low-voltage insulation body 7, insulated column 8 and a secondary lead wires metallic sheath 9; High voltage insulator 6 is the form of cylinder for the cuboid bottom for top; Low-voltage insulation body 7 is the cylinder form of horizontal positioned, and low-voltage insulation body 7 runs through with high voltage insulator 6 and intersects together; Secondary lead wires metallic sheath 9 is L shaped shape, and its end has screw thread.An input terminal 4 and an outlet terminal 5 are positioned at low-voltage insulation body 7 axis end positions, and an input terminal 4 is for having the straight plate shape of installing hole, and an outlet terminal 5 is for having the disc-shape of open bore; The insulated column 8 of sealing secondary lead wires metallic sheath 9 be positioned at low-voltage insulation body 7 under, and be evenly distributed with full skirt 10 on it; Secondary lead wires metallic sheath 9 is metal hollow tubular, and secondary lead wires cable 11 is therefrom drawn.
Assembling process of the present invention is following: secondary winding 3 is wound on the iron core 1 of circular ring type equably; And pair help the wrapping insulating material after; Utilize winding 2 of specific purpose tool coiling and insulate and cushion wrapping, form have input terminal 4, the coil device body of outlet terminal 5, winding 2, secondary winding 3; Secondary winding 3 employing head ends are that the secondary lead wires metallic sheath 9 of support is fixed on the mould; One time winding 2 adopts an input terminal 4 and an outlet terminal 5 to be fixed on the mould; Adjust distance back with epoxide resin vacuum cast cured explosive and silicon rubber compound inslation, become a integral structure thereupon by input terminal 4, outlet terminal 5, high voltage insulator 6, low-voltage insulation body 7, insulated column 8, secondary lead wires metallic sheath 9, secondary lead wires cable 11.
The high voltage insulator 6 that is encapsulated with a winding 2 of electric current is the cuboid form; Guarantee that a winding can accomplish very big dynamic and thermal stability electric current; The low-voltage insulation body 7 of sealing secondary winding 3 is the cylinder form of horizontal positioned; Make its periphery have enough insulating spaces, can make the form of polytropic ratio; Secondary lead wires metallic sheath 9 is L shaped shape, and its end has the screw thread of certain-length, not only guarantee to be connected with the reliable electric of pole-mounted circuit breaker, and can with the interface installation that is well on of all pole-mounted circuit breaker casings.
An input terminal 4 and an outlet terminal 5 are positioned at low-voltage insulation body 7 axis end positions, and an input terminal 4 can be installed with the plate-shaped bus-bars terminal board for having the straight plate shape of installing hole easily and reliably smoothly; An outlet terminal 5 is for having the disc-shape of open bore, as carrying out machinery and electric the connection with end of incoming cables of pole-mounted circuit breaker;
The insulated column 8 of sealing secondary lead wires metallic sheath 9 be positioned at low-voltage insulation body 7 under; Protection secondary cable lead-in wire smooth transition, and above be distributed with uniform full skirt 10, can effectively strengthen instrument transformer surface creepage distance; Increase insulation level, guarantee pollution flashover voltage can not occur; Secondary lead wires metallic sheath 9 is metal hollow tubular, makes things convenient for the drawing of all secondary lead wires cables of polytropic ratio, and can effectively guarantee the secondary lead wires Seal of Cables, can the short circuit because rainwater soaks, corrosion.
During use; Utilize outlet terminal 5 and pole-mounted circuit breaker end of incoming cables to carry out electric and mechanical attachment; Utilize secondary lead wires metallic sheath 9 and casing to carry out mechanical attachment again; Carry out the wiring of secondary lead wires cable 11 and switch, the convenient, flexible completion of installment work of the present invention at box house according to designing requirement at last.
Pole-mounted circuit breaker of the present invention is a kind of new product that designs according to national standard fully with Outdoor Current Transformer; Employing rolls iron core; Utilize the electromagnetic conversion principle, make the secondary current situation of change of reflected measurement primary current exactly, be transferred to secondary measurement and control device; Product directly is installed in the pole-mounted circuit breaker goes, use as electric current, electric energy measurement and relaying protection.It adopts epoxy resin silicon rubber compound inslation to form; Polytropic ratio, range of application are big, standardization, easy for installation, high dynamic and thermal stability electric current, precision accurately, insulation is stable, maintenance period the is long special-purpose Outdoor Current Transformer of pole-mounted circuit breaker; Solved that the volume that long-term outdoor pole-mounted circuit breaker exists is big, insulation is unstable, range of application is little, transform problems such as changing difficulty, has improved the designing and manufacturing level of pole-mounted circuit breaker greatly.
Claims (3)
1. a pole-mounted circuit breaker is used Outdoor Current Transformer; Be the integral structure that adopts epoxy resin and silicon rubber compound inslation to form by iron core, winding, secondary winding, input terminal, outlet terminal, high voltage insulator, low-voltage insulation body, insulated column and a secondary lead wires metallic sheath; It is characterized in that: high voltage insulator (6) top is the form of cylinder for the cuboid bottom; Low-voltage insulation body (7) is the cylinder form of horizontal positioned, and low-voltage insulation body (7) runs through with high voltage insulator (6) and intersects together; Secondary lead wires metallic sheath (9) is L shaped shape, and its end has screw thread; The said insulated column (8) of sealing secondary lead wires metallic sheath (9) be positioned at low-voltage insulation body (7) under, and be evenly distributed with full skirt (10) on the said insulated column (8).
2. use Outdoor Current Transformer by the said pole-mounted circuit breaker of claim 1; It is characterized in that: an input terminal (4) and an outlet terminal (5) are positioned at low-voltage insulation body (7) axis end positions; An input terminal (4) is for having the straight plate shape of installing hole, and an outlet terminal (5) is for having the disc-shape of open bore.
3. use Outdoor Current Transformer by the said pole-mounted circuit breaker of claim 1, it is characterized in that: secondary lead wires metallic sheath (9) is metal hollow tubular, and secondary lead wires cable (11) is therefrom drawn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910187243XA CN102013310B (en) | 2009-09-04 | 2009-09-04 | User external current transformer of pole-mounted circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910187243XA CN102013310B (en) | 2009-09-04 | 2009-09-04 | User external current transformer of pole-mounted circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102013310A CN102013310A (en) | 2011-04-13 |
| CN102013310B true CN102013310B (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910187243XA Active CN102013310B (en) | 2009-09-04 | 2009-09-04 | User external current transformer of pole-mounted circuit breaker |
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| CN (1) | CN102013310B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368261A (en) * | 2013-06-25 | 2013-10-23 | 国家电网公司 | On-line monitoring and inspection system for transformer substation |
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2009
- 2009-09-04 CN CN200910187243XA patent/CN102013310B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| JP平10-312925A 1988.11.24 |
| JP昭57-117217A 1982.07.21 |
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| CN102013310A (en) | 2011-04-13 |
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