CN201956187U - Electronic type voltage transformer - Google Patents
Electronic type voltage transformer Download PDFInfo
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- CN201956187U CN201956187U CN2010202916471U CN201020291647U CN201956187U CN 201956187 U CN201956187 U CN 201956187U CN 2010202916471 U CN2010202916471 U CN 2010202916471U CN 201020291647 U CN201020291647 U CN 201020291647U CN 201956187 U CN201956187 U CN 201956187U
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- voltage transformer
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Abstract
Provided is an electronic type voltage transformer. A weak magnetic coupling sensing component is arranged a casting body, two terminals of the primary winding of the sensing component are respectively connected to a primary binding post and a grounding terminal that are arranged on the casting body, and the secondary winding of the sensing component is serially connected to a senseless resistive component; the output end of the secondary signal of the sensing component is connected to a secondary binding post after the secondary signal of the sensing component is adjusted by the senseless resistive component, and the primary winding and the secondary winding of the sensing component are respectively provided with a segment average voltage and a layered shield. The electronic type voltage transformer in the utility model has the advantages of high accuracy grade, good stability and anti-EMI through weak magnetic coupling, by selecting resistive resistance with low temperature drift as the component and taking the comprehensive measures of average voltage and shielding on electric field.
Description
Technical field
The utility model patent relates to a kind of electric component, is the low-voltage that the high-voltage variable in the electric power system is changed into certain numerical value, with metering, the measurement of supplying with electric power system and the electronic type voltage transformer of implementing relaying protection.
Background technology
In electric power system; the required signal of the metering of voltage, measurement and enforcement relaying protection mostly adopts electromagnetic transformer to provide; the problem that this instrument transformer exists is that short circuit risk, Heavy Weight, big, the secondary load reflection sensitivity of volume are arranged; ferro resonance easily takes place, and also potential safety hazard can take place when serious.At present, continuous development along with intellectualized technology, electric power system develops to networking, automation and digitlization direction, the required input signal of secondary device significantly reduces, do not need jumbo secondary singal, therefore this traditional electromagnetic potential transformer is difficult to satisfy new specification requirement.Press for a kind ofly do not have that short circuit risk, small size, light weight, secondary load are insensitive, stable performance, electronic mutual inductor that the linearity is good.
The needs of building along with the development of digital transformer substation and intelligent grid; electric power system is to measuring; protection; control and data transmission intelligentization; the requirement of automation is more and more higher; the electronic type voltage transformer that arises at the historic moment thus also becomes popular research object; at present in the medium voltage network; electronic type voltage transformer adopts electric resistance partial pressure principle and capacitance-resistance voltage divider principle mostly; the electronic type voltage transformer that designs with this principle; there is load capacity low (more than megaohm); complex structure (words of capacitance-resistance dividing potential drop need additional power source); precision is low; particularly after operation a period of time; the error information substantial deviation; surpass the class of accuracy data when dispatching from the factory, do not reach user's actual requirement.
The utility model content
The purpose of this utility model is to provide that a kind of certainty of measurement height, the linearity are good, the electronic type voltage transformer of stable performance, no short circuit risk.
The technical scheme that technical problem adopted that the utility model solves is:
A kind of electronic type voltage transformer, it is characterized in that in pour mass, being provided with the sensing part of a weak magnetic coupling, two terminals of a winding of sensing part respectively be located at pour mass on primary connection terminal (HV Terminal A) be connected with earth terminal (earth terminal N), the secondary winding of sensing part is serially connected with noninductive resistance element, a noninductive resistance element part is set directly in the pour mass, and a part is arranged in the adjustment box with function of shielding.Sensing part secondary singal output after noninductive resistance element adjustment is connected with the secondary connection terminal, and the winding and the secondary winding of sensing part are respectively equipped with measures such as segmentation is all pressed, laminated shield.
A winding of described sensing part is wound on the skeleton of insulation equably, and the two ends of a winding are connected with earth terminal with the primary connection terminal that is embedded in pour mass respectively.
Described primary connection terminal and earth terminal are the connector that has internal thread, are embedded in the upper and lower of instrument transformer pour mass respectively.
The secondary winding of described sensing part be wound on equably with the coaxial insulation framework of winding on, and winding and secondary winding be by the organic insulating material isolation of insulating, secondary winding is connected with the secondary connection terminal after connecting noninductive resistance element.
Described noninductive resistance element is one group of resistance, and it is connected in series with the secondary winding of sensing part, has this part resistance that low temperature floats and is set directly in the pour mass, and its another part resistance is contained in the adjustment box with function of shielding.These noninductive resistance elements have that ambient temperature range is wide, precision is high, temperature coefficient is little, the characteristics of good stability.
The sensing part secondary singal is connected with the secondary terminal with shielding wire through noninductive resistance element conversion output.
Be connected with the external shield cable on the secondary connection terminal, the other end of external shield cable has the connector that can conveniently connect.Described adjustment box end is connected through the screen of shielding wire outer net with the secondary terminal.
Described segmentation is all pressed to by the equipotential difference current potential ring is set on a winding of sensing part.
Described laminated shield is the wrapping of carrying out with different conductors on the secondary winding of sensing part step by step.Described weak magnetic coupling sensing part is an assembly that has winding, secondary winding, little iron core.
Electronic type voltage transformer of the present utility model, owing to adopted weak magnetic coupling sensing and low temperature to float resistance alloys sampling principle of combining, make designed product not only have no short circuit risk, in light weight, electronic type product characteristics such as volume is little, linear zone field width, and properties of product are stable, load capacity strong (kilo-ohm more than), no additional power source, simple in structure, easy for installation.
The improved utility model of present technique is based on weak magnetic coupling and noninductive resistive resistive element transfer principle carries out new combination, by being connected of weak magnetic coupling sensing part and noninductive resistance element, with the high-voltage variable of the electric power transmission network low-voltage for satisfying intellectuality, the various functional requirements of digitlization and being directly proportional with it, and this low voltage signal has that precision height, the linearity are good, the characteristics of stable performance, no short circuit risk.Thereby replaced traditional electromagnetic potential transformer.Because voltage transformer no short circuit risk phenomenon in whole measuring range, input and output linearity degree is good, and therefore stable performance is used with intelligentized secondary unit matching, can improve certainty of measurement and reliability widely.It is the conversion element of weak magnetic-coupled sensing element and noninductive resistive resistance to be carried out the Combination Design of novelty that present technique is improved utility model, thereby product is produced have that certainty of measurement height, the linearity are good, new technique effect that stable performance, no short circuit risk etc. can be satisfied intelligent secondary device demand.A winding of sensing part is wound on the skeleton of insulation equably, and the two ends of its winding are connected with the ground connection inserts with the primary connection terminal that is embedded in the pour mass top and the bottom respectively, and a section of winding coiling also is provided with the current potential ring by the equipotential notion.The secondary winding of sensing part is sleeved in the insulation framework and by organic insulation and a winding equably isolates, and secondary winding is connected with the secondary connection terminal after being connected in series noninductive resistance element.Noninductive resistance element is contained in the adjustment box of function of shielding, and noninductive resistance element all uses shielding wire to be connected with the line of secondary winding, secondary terminal, adjustment box, can form good shielding action by above measure, improves its antijamming capability.Electronic type voltage transformer adopts organic insulating material that above-mentioned sensing part, noninductive resistance element, binding post, adjustment box, shielding line etc. are poured into an integrated entity, and has good insulation performance performance and mechanical performance.The gabarit of its pour mass is an oblong-shaped, a HV Terminal at an upper portion thereof, earth terminal and secondary connection terminal are in its underpart, the end of secondary has connector, to be connected with intelligent two sub-cells easily.
Present technique is improved the characteristics of utility model:
The beneficial effects of the utility model are:
(1) precision height, the linearity are good, stable performance;
(2) the dangerous phenomenon of no Short-Circuit High Current, it is safe and reliable to operation;
(3) multiple functional, easy to use, can be used as the measurement of electronic system and the sensing element of protection usefulness;
(4) volume is little, in light weight;
(5) cost is low, and operation energy consumption is little;
(6) noiseless, anti-interference, have a superior environmental protection characteristic;
The utility model can satisfy metering, the measurement of electric power system and protect the needs that develop to digitlization, intellectuality, networked direction.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the structural representation of the utility model embodiment.
Among the figure: 1, primary connection terminal 2, winding 3, secondary winding 4, once terminal line 5, skeleton 6, ground connection inserts 7, adjust box 8, noninductive resistance element I 9, secondary side line I 10, secondary connection terminal 11, noninductive resistance element II 12, laminated shield 13, secondary side line II 14, epoxy resin 15, segmentation grading ring
Embodiment
According to shown in Figure 1, embodiment states to the utility model below:
As shown in Figure 1, electronic type voltage transformer has adopted the sensing part of weak magnetic coupling, a winding 2 of sensing part is wound on the skeleton 5 of insulation equably, the two ends of a winding 2 are connected with ground connection inserts 6 with the primary connection terminal 1 of the pour mass top and the bottom that are embedded in epoxy resin 14 respectively, primary connection terminal 1 and ground connection inserts 6 are for having the connector of internal thread, i.e. attaching nut.Secondary winding 3 is nested on the skeleton 5, and primary side and secondary side isolate by organic insulation, and the high voltage of primary side and the low-voltage of secondary side are isolated fully, has played the effect of safe insulation.Secondary winding 3 is connected with secondary connection terminal 10 behind noninductive resistance element I 8 and noninductive resistance element II 11.Noninductive resistance element II 11 is set directly in the pour mass, and noninductive resistance element I 8 is contained in 7 li in adjustment box with function of shielding.A winding 2 of sensing part is provided with segmentation grading ring 15, and secondary winding 3 is provided with laminated shield 12.The once terminal line 4 of sensing part and all secondary side line I 9 all are connected with the shielding conductor transition with secondary side line II 13.Be connected with the shielded cable that a certain-length and an end have connector on the secondary connection terminal 10, so that it is connected with external equipment easily.The electric part of entire product pours into an integrated entity with epoxy resin 14.
Because by weak magnetic coupling, element is chosen the resistive resistance that employing low temperature floats on this instrument transformer design, on the electric field treatment employing all press, aggregate measures such as shielding, so this electronic mutual inductor has advantages such as class of accuracy height, good stability, anti-electromagnetic interference.
Claims (11)
1. electronic type voltage transformer, it is characterized in that in pour mass, being provided with the sensing part of a weak magnetic coupling, two terminals of winding of sensing part respectively be located at pour mass on the primary connection terminal be connected with earth terminal, the secondary winding of sensing part is serially connected with noninductive resistance element; Sensing part secondary singal output after noninductive resistance element adjustment is connected with the secondary connection terminal, and winding of sensing part and secondary winding are respectively equipped with that segmentation is all pressed, laminated shield.
2. electronic type voltage transformer according to claim 1 is characterized in that a winding is wound on the skeleton of insulation equably, and the two ends of a winding are connected with earth terminal with the primary connection terminal that is embedded in pour mass respectively.
3. electronic type voltage transformer according to claim 1 and 2 is characterized in that primary connection terminal and earth terminal are the connector that has internal thread, and it is embedded in the upper and lower of instrument transformer pour mass respectively.
4. electronic type voltage transformer according to claim 1, it is characterized in that secondary winding be wound on equably with the coaxial insulation framework of winding on, and winding and secondary winding are by the organic insulating material isolation of insulating, and secondary winding is connected with the secondary connection terminal after connecting noninductive resistance element.
5. according to claim 1 or 4 described electronic type voltage transformers, it is characterized in that described noninductive resistance element is one group of resistance, it is connected in series with the secondary winding of sensing part, have this part resistance that low temperature floats and be set directly in the pour mass, another part resistance is contained in the adjustment box with function of shielding.
6. according to claim 1 or 4 described electronic type voltage transformers, it is characterized in that the sensing part secondary singal is connected with the secondary terminal with shielding wire through noninductive resistance element conversion output.
7. according to claim 1 or 4 described electronic type voltage transformers, it is characterized in that being connected with the external shield cable on the described secondary connection terminal, the other end of external shield cable has the connector that can conveniently connect.
8. electronic type voltage transformer according to claim 5 is characterized in that described adjustment box end is connected through the screen of shielding wire outer net with the secondary terminal.
9. electronic type voltage transformer according to claim 1 is characterized in that described segmentation all presses to by the equipotential difference current potential ring is set on a winding of sensing part.
10. electronic type voltage transformer according to claim 1 is characterized in that described laminated shield is the wrapping of carrying out with different conductors on the secondary winding of sensing part step by step.
11. electronic type voltage transformer according to claim 1 is characterized in that described weak magnetic coupling sensing part is an assembly that has winding, secondary winding, little iron core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202916471U CN201956187U (en) | 2010-08-12 | 2010-08-12 | Electronic type voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202916471U CN201956187U (en) | 2010-08-12 | 2010-08-12 | Electronic type voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201956187U true CN201956187U (en) | 2011-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202916471U Expired - Lifetime CN201956187U (en) | 2010-08-12 | 2010-08-12 | Electronic type voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201956187U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930838A (en) * | 2010-08-12 | 2010-12-29 | 浙江天际互感器有限公司 | Electronic type voltage transformer |
| CN108597826A (en) * | 2018-04-27 | 2018-09-28 | 上海大互电力电器有限公司 | Totally-enclosed epoxy resins insulation voltage transformer |
| CN112768198A (en) * | 2020-12-24 | 2021-05-07 | 江金北(北京)自动化技术有限公司 | Mutual inductor winding structure |
-
2010
- 2010-08-12 CN CN2010202916471U patent/CN201956187U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101930838A (en) * | 2010-08-12 | 2010-12-29 | 浙江天际互感器有限公司 | Electronic type voltage transformer |
| CN108597826A (en) * | 2018-04-27 | 2018-09-28 | 上海大互电力电器有限公司 | Totally-enclosed epoxy resins insulation voltage transformer |
| CN108597826B (en) * | 2018-04-27 | 2020-11-24 | 上海大一互电力电器有限公司 | Totally-enclosed epoxy resin insulation voltage transformer |
| CN112768198A (en) * | 2020-12-24 | 2021-05-07 | 江金北(北京)自动化技术有限公司 | Mutual inductor winding structure |
| CN112768198B (en) * | 2020-12-24 | 2022-04-05 | 江金北(北京)自动化技术有限公司 | Mutual inductor winding structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110831 |
|
| CX01 | Expiry of patent term |