CN201601018U - Anti-resonant voltage transformer adaptable to plateau - Google Patents
Anti-resonant voltage transformer adaptable to plateau Download PDFInfo
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- CN201601018U CN201601018U CN2009202780680U CN200920278068U CN201601018U CN 201601018 U CN201601018 U CN 201601018U CN 2009202780680 U CN2009202780680 U CN 2009202780680U CN 200920278068 U CN200920278068 U CN 200920278068U CN 201601018 U CN201601018 U CN 201601018U
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- 238000004804 winding Methods 0.000 claims abstract description 90
- 239000003822 epoxy resin Substances 0.000 claims abstract description 7
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 7
- 230000004888 barrier function Effects 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 abstract description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005290 antiferromagnetic effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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Abstract
The utility model discloses an anti-resonant voltage transformer adaptable to plateau. The transformer comprises a three-phase three-post transformer and a single-phase double-winding transformer, wherein one end of a primary winding coil of the single-phase double-winding transformer is electrically connected with tail ends of three groups of primary coils of the three-phase three-post transformer respectively while the other end thereof is served as a ground end, one end of a first group of secondary winding coils of the single-phase double-winding transformer is electrically connected with tail ends of three groups of secondary coils of the three-phase three-post transformer respectively while the other end thereof is used as a ground end, outer surfaces of the single-phase double-winding transformer and the three-phase three-post transformer are both cast with epoxy resin so as to form a packaged cast, the packaged cast is provided with primary and secondary connecting terminals, and leads of the single-phase double-winding transformer and the three-phase three-post transformer are respectively connected to the corresponding primary and secondary connecting terminals. The single-phase double-winding transformer of the voltage transformer is used as a grounded zero-sequence voltage transformer at the transformer neutral point so as to avoid burnout due to resonance.
Description
Technical field
The utility model relates to the High-Voltage Electrical Appliances device, particularly relates to a kind of totally-enclosed low-pressure dry voltage transformer.
Background technology
At present, voltage transformer generally is used in the power network line, as the equipment of voltage, electric energy measurement and protection.In the prior art three-phase line A, B, C three-phase are carried out three voltage transformers of the general employing of measuring voltage transformer and be electrically connected formation.But in using, this voltage transformer is when single-phase earthing appears in electrical network, one group of line voltage that bears the three phase mains circuit in the winding of three instrument transformers of connection A, B, C three-phase, make three voltage transformers bear asymmetrical voltage, with change before the single-phase short circuit, can cause the inductance of three voltage transformers to change, have saturated phenomenon, and then resonance can take place.In addition, because other shooting conditions also can cause the neutral point of three voltage transformers to be subjected to displacement, resonance can take place, damage because of resonance then can cause voltage transformer.And the existing voltage transformer that is used for three-phase line also exists pour mass little, and arc dodges apart from little, is not suitable for the problem in the abominable area of environment such as plateau, air pressure height.
The utility model content
Based on above-mentioned existing in prior technology problem, the purpose of the utility model embodiment provides a kind of anti-resonant voltage transformer that is applicable to the plateau, and it has anti-resonance function, in the time of can avoiding the short circuit of voltage sensor, causes the voltage sensor to damage.
The utility model is achieved through the following technical solutions:
The utility model embodiment provides a kind of anti-resonant voltage transformer that is applicable to the plateau, comprising:
Three-phase three-limb instrument transformer and single-phase double winding instrument transformer;
Primary winding coils one end of described single-phase double winding instrument transformer is electrically connected with three groups of primary winding ends of described three-phase three-limb instrument transformer respectively, and the other end of the primary winding coils of described single-phase double winding instrument transformer is as earth terminal;
First group of secondary winding coil one end of described single-phase double winding instrument transformer is electrically connected with three groups of secondary coil ends of described three-phase three-limb instrument transformer respectively, and the other end of this first group of secondary winding coil is as earth terminal;
Described single-phase double winding instrument transformer and three-phase three-limb instrument transformer outside all are cast with epoxide resin material and form the encapsulation pour mass, be equipped with first and second binding post on the described pour mass, described single-phase double winding instrument transformer is connected to first and second corresponding binding post respectively with the lead-out wire of three-phase three-limb instrument transformer.
By above-mentioned embodiment of the present utility model as can be seen, in the utility model embodiment,, a single-phase double winding instrument transformer and three-phase three-limb instrument transformer be electrically connected by being set, single-phase double winding instrument transformer plays the effect of zero sequential potential transformer, when this voltage transformer is used, when single-phase earthing appears in electrical network, the phase voltage of bearing the three phase mains circuit on the single-phase double winding instrument transformer primary winding coils, and and A, B, the primary winding of the three-phase three-limb instrument transformer that C three is connected still bears the symmetrical voltage of circuit, that is with single-phase short circuit before and no change, after short circuit disappears, each winding remains and bears symmetrical voltage, therefore, the inductance of three-phase three-limb instrument transformer does not change, and does not have saturated phenomenon, just resonance can not take place yet.In addition, even there are other shooting conditions, but because neutral point is not subjected to displacement, resonance can not take place yet.Can avoid the voltage transformer resonance that causes because of single-phase short circuit or other reason, reduce the damage of the voltage transformer that causes because of resonance.
Description of drawings
The structural representation of the voltage transformer that Fig. 1 provides for the utility model embodiment;
The side-looking structural representation of the voltage transformer that Fig. 2 provides for the utility model embodiment;
The voltage transformer internal circuit connection diagram that Fig. 3 provides for the utility model embodiment;
Each label is among the figure:
1, iron core; 2, skeleton; 3, secondary coil; 4, insulating barrier; 5, primary winding; 6, pour mass; 7, secondary connection terminal; 8, primary connection terminal; 9, base plate is installed.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Embodiment
Present embodiment provides a kind of anti-resonant voltage transformer that is applicable to the plateau, can be used on to do voltage, electric energy measurement and protection use in the power circuit, and shown in Fig. 1～3, this voltage transformer comprises:
Three-phase three-limb instrument transformer and single-phase double winding instrument transformer;
Wherein, the three-phase three-limb instrument transformer specifically comprises: three groups of primary windings, insulating barrier and three groups of secondary coils;
Described three groups of secondary coils coiling respectively are arranged on the same iron core 1, and described three groups of secondary coils, 3 outer coilings are provided with insulating barrier 4, and described insulating barrier 4 outer coilings respectively are provided with three groups of primary windings 5; Every group of secondary coil 3 forms by described iron core with corresponding one group of primary winding 5 and is of coupled connections; The head end of described three groups of primary windings is as the primary connection end, and the end of three groups of primary windings is electrically connected mutually; The head end of described three groups of secondary coils is as the secondary connection end, and the end of three groups of secondary coils is electrically connected mutually.First and second coil of three groups of correspondences of three-phase three-limb instrument transformer can be cast with epoxide resin material outward respectively and form three and independently encapsulate pour mass 6, described three independently encapsulate pour mass and connect as one structure by same iron core.In the reality, the every group first and second independent coiling of coil, be specially: secondary coil is entangled on the skeleton, coiling insulating barrier on secondary coil again, as the layer insulation between secondary coil and the primary winding, coiling primary winding again on insulating barrier at last becomes an instrument transformer independently in first and second circle outside through poured with epoxy resin, pour into independently instrument transformer with three and be arranged on and connect into an integral body on the same iron core, just become the three-phase three-limb instrument transformer.
Single-phase double winding instrument transformer wherein specifically comprises: primary winding coils, insulating barrier and two groups of secondary winding coils;
Described two groups of equal coilings of secondary winding coil are arranged on the iron core, and the outer coiling of described two groups of secondary winding coils is provided with insulating barrier, and the outer coiling of described insulating barrier is provided with described primary winding coils; Described two groups of secondary winding coils all form by iron core and described primary winding coils and are of coupled connections.
As shown in Figure 3, primary winding coils one end of above-mentioned single-phase double winding instrument transformer is electrically connected with three groups of primary winding ends of described three-phase three-limb instrument transformer respectively, and the other end of the primary winding coils of described single-phase double winding instrument transformer is as earth terminal;
First group of secondary winding coil one end of described single-phase double winding instrument transformer is electrically connected with three groups of secondary coil ends of described three-phase three-limb instrument transformer respectively, and the other end of this first group of secondary winding coil is as earth terminal;
Described single-phase double winding instrument transformer and three-phase three-limb instrument transformer outside all are cast with epoxide resin material and form the encapsulation pour mass, be equipped with first and second binding post 8,7 on the described pour mass, described single-phase double winding instrument transformer is connected to first and second corresponding binding post 8,7 respectively with the lead-out wire of three-phase three-limb instrument transformer.
Above-mentioned three-phase three-limb instrument transformer is connected the back forms to be set up in parallel after a plurality of pour mass instrument transformers shown in Figure 1 connect and form an integrally-built voltage transformer with single-phase double winding instrument transformer, be provided with in the pour mass bottom of this instrument transformer and be convenient to the installation base plate 9 that this instrument transformer is installed.
During practical application, between two outputs of second group of secondary winding coil of above-mentioned single-phase double winding instrument transformer protective device can also be set, an output of this second group of secondary winding coil is as earth terminal.Described protective device adopts relay, and its operation voltage can be set in 100V, when reaching 100V voltage, and this actuating of relay.
Between the secondary coil output of three-phase three-limb instrument transformer, can connect various measuring instrumentations.
The voltage transformer that provides among the utility model embodiment is connected with three instrument transformers in the three-phase three-limb instrument transformer by a single-phase double winding instrument transformer is set, make single-phase double winding instrument transformer play the effect of zero sequential potential transformer, broken the mode of connection that traditional voltage transformer that is used for three-phase line only adopts three single-phase potential transformers, when the voltage transformer of this structure is applied in the three-phase line, when single-phase earthing appears in electrical network, the phase voltage of bearing power supply on the single-phase double winding instrument transformer primary winding coils as zero sequential potential transformer, and connection A, B, the primary winding of the three-phase three-limb instrument transformer of C three-phase line still bears the symmetrical voltage of network, that is with single-phase short circuit before and no change, after short circuit disappears, each primary winding of three-phase three-limb instrument transformer still bears symmetrical voltage, therefore, the inductance of three-phase three-limb instrument transformer does not change, there is not saturated phenomenon, just resonance can not take place yet.In addition, even there are other shooting conditions, because three-phase three-limb instrument transformer neutral point can not be subjected to displacement, resonance can not take place yet, thereby avoid this voltage transformer to burn because of resonance.
In the reality, can strengthen the volume of above-mentioned voltage transformer pour mass, increased the umbrella number and strengthened umbrella thick, whole pour mass has improved height, one time creep distance reaches 442mm, has satisfied three grades of gradation for surface pollution, and the creepage distance and the arc that can improve this voltage transformer like this dodge distance, thereby improve the use height above sea level of this voltage transformer, go for the highlands.This voltage transformer can indoors use, and being used in for frequency is 50Hz or 60Hz, does voltage, electric energy measurement and used for relay protection in ceiling voltage 12kV of system and the following electric power system.It is good to have the anti-ferromagnetic attainments performance of shaking, and creep distance is big, the characteristics that the dirty grade of anti-soil is high.
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.
Claims (7)
1. an anti-resonant voltage transformer that is applicable to the plateau is characterized in that, comprising:
Three-phase three-limb instrument transformer and single-phase double winding instrument transformer;
Primary winding coils one end of described single-phase double winding instrument transformer is electrically connected with three groups of primary winding ends of described three-phase three-limb instrument transformer respectively, and the other end of the primary winding coils of described single-phase double winding instrument transformer is as earth terminal;
First group of secondary winding coil one end of described single-phase double winding instrument transformer is electrically connected with three groups of secondary coil ends of described three-phase three-limb instrument transformer respectively, and the other end of this first group of secondary winding coil is as earth terminal;
Described single-phase double winding instrument transformer and three-phase three-limb instrument transformer outside all are cast with epoxide resin material and form the encapsulation pour mass, be equipped with first and second binding post on the described pour mass, described single-phase double winding instrument transformer is connected to first and second corresponding binding post respectively with the lead-out wire of three-phase three-limb instrument transformer.
2. the anti-resonant voltage transformer that is applicable to the plateau as claimed in claim 1 is characterized in that, described single-phase double winding instrument transformer specifically comprises:
Primary winding coils, insulating barrier and two groups of secondary winding coils;
Described two groups of equal coilings of secondary winding coil are arranged on the iron core, and the outer coiling of described two groups of secondary winding coils is provided with insulating barrier, and the outer coiling of described insulating barrier is provided with described primary winding coils; Described two groups of secondary winding coils all form by iron core and described primary winding coils and are of coupled connections.
3. the anti-resonant voltage transformer that is applicable to the plateau as claimed in claim 1 is characterized in that, described three-phase three-limb instrument transformer specifically comprises:
Three groups of primary windings, insulating barrier and three groups of secondary coils;
Described three groups of secondary coils coiling respectively are arranged on the same iron core, and the outer coiling of described three groups of secondary coils is provided with insulating barrier, described insulating barrier outward respectively coiling three groups of primary windings are set; Every group of secondary coil forms by described iron core with corresponding one group of primary winding and is of coupled connections; The head end of described three groups of primary windings is as the primary connection end, and the end of three groups of primary windings is electrically connected mutually; The head end of described three groups of secondary coils is as the secondary connection end, and the end of three groups of secondary coils is electrically connected mutually.
4. the anti-resonant voltage transformer that is applicable to the plateau as claimed in claim 3, it is characterized in that, first and second coil of three groups of correspondences of described three-phase three-limb instrument transformer is cast with epoxide resin material outward respectively and forms three and independently encapsulate pour mass, and described three independently encapsulate pour mass and connect as one structure by same iron core.
5. the anti-resonant voltage transformer that is applicable to the plateau as claimed in claim 1; it is characterized in that; also be connected with protective device between two outputs of second group of secondary winding coil of described single-phase double winding instrument transformer, an output of this second group of secondary winding coil is as earth terminal.
6. the anti-resonant voltage transformer that is applicable to the plateau as claimed in claim 5 is characterized in that, described protective device adopts relay.
7. the anti-resonant voltage transformer that is applicable to the plateau as claimed in claim 1 is characterized in that, described pour mass bottom also is provided with the installation base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202780680U CN201601018U (en) | 2009-12-14 | 2009-12-14 | Anti-resonant voltage transformer adaptable to plateau |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202780680U CN201601018U (en) | 2009-12-14 | 2009-12-14 | Anti-resonant voltage transformer adaptable to plateau |
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| Publication Number | Publication Date |
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| CN201601018U true CN201601018U (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202780680U Expired - Fee Related CN201601018U (en) | 2009-12-14 | 2009-12-14 | Anti-resonant voltage transformer adaptable to plateau |
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| CN (1) | CN201601018U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170121A (en) * | 2011-04-21 | 2011-08-31 | 华北电力大学（保定） | Harmonic eliminator with corrected voltage transformer |
| CN102253265A (en) * | 2011-04-21 | 2011-11-23 | 华北电力大学（保定） | Method for compensating voltage measurement errors of voltage transformer with neutral point grounded via equivalent impedance device |
| CN105182019A (en) * | 2015-08-28 | 2015-12-23 | 国家电网公司 | A device and system for reducing the fusing frequency of a fuse |
| CN113410035A (en) * | 2021-06-25 | 2021-09-17 | 河北旭辉电气股份有限公司 | Anti-resonance voltage transformer with grounding compensation function based on Y-shaped wiring |
| CN115497730A (en) * | 2022-10-12 | 2022-12-20 | 醴陵市浦口电瓷制造有限公司 | High-strength voltage transformer demagnetization protection structure and installation method thereof |
-
2009
- 2009-12-14 CN CN2009202780680U patent/CN201601018U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170121A (en) * | 2011-04-21 | 2011-08-31 | 华北电力大学（保定） | Harmonic eliminator with corrected voltage transformer |
| CN102253265A (en) * | 2011-04-21 | 2011-11-23 | 华北电力大学（保定） | Method for compensating voltage measurement errors of voltage transformer with neutral point grounded via equivalent impedance device |
| CN102170121B (en) * | 2011-04-21 | 2014-10-29 | 华北电力大学（保定） | Resonance eliminator with correcting potential transformer |
| CN105182019A (en) * | 2015-08-28 | 2015-12-23 | 国家电网公司 | A device and system for reducing the fusing frequency of a fuse |
| CN113410035A (en) * | 2021-06-25 | 2021-09-17 | 河北旭辉电气股份有限公司 | Anti-resonance voltage transformer with grounding compensation function based on Y-shaped wiring |
| CN115497730A (en) * | 2022-10-12 | 2022-12-20 | 醴陵市浦口电瓷制造有限公司 | High-strength voltage transformer demagnetization protection structure and installation method thereof |
| CN115497730B (en) * | 2022-10-12 | 2024-09-17 | 醴陵市浦口电瓷制造有限公司 | High-strength voltage transformer demagnetizing protection structure and installation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101006 Termination date: 20161214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |