CN202034222U - 3-35kV multifunctional electromagnetic voltage transformer - Google Patents
3-35kV multifunctional electromagnetic voltage transformer Download PDFInfo
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- CN202034222U CN202034222U CN2011200580545U CN201120058054U CN202034222U CN 202034222 U CN202034222 U CN 202034222U CN 2011200580545 U CN2011200580545 U CN 2011200580545U CN 201120058054 U CN201120058054 U CN 201120058054U CN 202034222 U CN202034222 U CN 202034222U
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- voltage transformer
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- transformer
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Abstract
The utility model relates to a 3-35kV multifunctional electromagnetic voltage transformer which comprises an iron core, a primary winding and a main secondary winding, wherein the primary winding and the main secondary winding are all wound on the iron core; an auxiliary secondary winding with taps is also wound on the iron core. The auxiliary secondary winding with the taps is additionally arranged on the iron core of the voltage transformer, so that the transformer can realize the functions of an earthed transformer and an unearthed transformer; in addition, the 3-35kV multifunctional electromagnetic voltage transformer has compact and simple structure, low loss, no partial discharge, is convenient to use, has high safety, is maintenance free and is applicable to 3-35kV voltage systems.
Description
Technical field
The utility model relates to electromagnetic technology field, particularly relates to electromagnetic potential transformer, is a kind of multifunctional electromagnetic formula voltage transformer specifically, corresponding to the electromagnetic multifunctional voltage transformer of 3-35kV in the electric power system.
Background technology
Existing 3-35kV electromagnetic potential transformer (to call voltage transformer in the following text) can be divided into earthed voltage transformer and unearthed voltage transformer according to the mode of connection.The general user is when ordering or use, and the voltage transformer that specifically adopts which kind of type is not too clear, even just finds when mounted, earthed voltage transformer and unearthed voltage transformer are obscured mutually, cause client's inconvenience, delay construction period, increase the cost input, cause the wasting of resources.
Existing most of earthed voltage transformers adopt laminated core or C sections core, and this class core loss is big, and its instrument transformer excitation property is poor, and is easily saturated, circuit ferro resonance probability height.Earth-free instrument transformer performance data be generally under 120% rated voltage under the no-load current and rated voltage the ratio of no-load current 2-3 doubly between, ground connection instrument transformer performance data be generally under 190% rated voltage under the no-load current and 100% rated voltage the ratio of no-load current be 5-15 doubly between, it is 3kV that earth terminal of conventional earthed voltage transformer reaches the secondary voltage withstand class over the ground, when circuit generation earth fault, the overvoltage that produces makes the earth terminal insulation damages easily, cause instrument transformer to burn, bring very big inconvenience to electric power system and user.
Summary of the invention
In order to overcome in the prior art ground connection instrument transformer and earth-free instrument transformer is produced separately, the use cost height, easily obscure, the low deficiency that waits of usage safety performance, the purpose of this utility model is to adopt a kind of compact conformation, low-loss, security performance height, 3-35kV electromagnetic multifunctional voltage transformer easy to use, realized providing on the instrument transformer function of ground connection instrument transformer and earth-free instrument transformer.
The technical solution adopted in the utility model is: a kind of 3-35kV electromagnetic multifunctional voltage transformer, comprise iron core, winding and main secondary winding, winding and main secondary winding all are around on the iron core, its technical characterstic is also to be wound with an auxiliary secondary winding on the described iron core, has tap on the auxiliary secondary winding.
Described iron core is a rectangle iron core.
Described main secondary winding is one or many.
The described main secondary winding number of turn is identical with the auxiliary secondary winding number of turn.
The tap of described auxiliary secondary winding and the end of auxiliary secondary winding are not on-state simultaneously.
When this voltage transformer used as earthed voltage transformer: voltage transformer was with the residue winding to protect whole circuit generally speaking, and head, the end of main secondary winding normally are communicated with, and the head end of auxiliary secondary winding and tap are connected and made the residue winding; Under special circumstances, the head of auxiliary secondary winding, the terminal connection are done second main secondary winding use, are not with the residue winding this moment.
When this voltage transformer uses as unearthed voltage transformer: voltage transformer generally speaking, the head of main secondary winding, terminal normal the connection use; Under special circumstances, the head of auxiliary secondary winding, the terminal connection are done second main secondary winding use.
After adopting above technical scheme, the beneficial effect that the utility model reaches is:
1, transformer iron core adopts annular core, and iron core is reeled by the silicon steel sheet of high-quality and formed, and compact conformation, loss are low, are difficult for bringing out ferro resonance, use stable, safe and reliable;
2, main secondary winding can be set at one or more windings according to specification requirement; Auxiliary secondary winding is a winding with tap; the tap of auxiliary secondary winding and the end of auxiliary secondary winding are not on-state simultaneously; can be grounded the exchange of instrument transformer and unearthed voltage transformer function; the auxiliary secondary winding secondary winding of can deciding is used when earth-free; auxiliary secondary winding can be done ground connection during ground connection; residue winding and main secondary winding are used; the ground connection instrument transformer has stronger antiresonance ability; it is used to do relaying protection when remaining winding in order to generation earth fault; avoided burning of instrument transformer; easy to use; safety; need not be equipped with ground connection and earth-free two kinds of voltage transformers respectively; do not exist the back of ordering goods to occur because mode of connection difference causes situation about can not install to on-the-spot; reduce under the analogue and cause the cycle of delaying engineering; increase the cost input; cause man power and material's waste, satisfy various occasions and use.
Voltage transformer of the present utility model realizes providing on the instrument transformer function of ground connection instrument transformer and earth-free instrument transformer setting up an auxiliary secondary winding with tap on the iron core, it is simple in structure, compact, low-loss, no partial discharge, performance height easy to use, safe, non-maintaining is applicable to that the electrical voltage system of 3-35kV is used.
Description of drawings
Fig. 1 is the structural representation of the utility model one embodiment;
Fig. 2 is the structural representation of another embodiment of the utility model.
Among the figure: 1,11, windings 2,21 of iron core, main secondary winding 3,31,32, auxiliary secondary winding 4,41, tap 5,51.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment illustrated in fig. 1 one, a kind of 3-35kV electromagnetic multifunctional voltage transformer comprises iron core 1, winding 2, main secondary winding 3 and an auxiliary secondary winding 4.One time winding 2, main secondary winding 3 and auxiliary secondary winding 4 all are around on the iron core 1, iron core 1 is a rectangle iron core, main secondary winding 3 numbers of turn are identical with auxiliary secondary winding 4 numbers of turn, have tap 5 on the auxiliary secondary winding 4, the tap 5 of auxiliary secondary winding is not on-state simultaneously with the end of auxiliary secondary winding.
With a 10(10/ √ 3) kV electromagnetic multifunctional voltage transformer is example, it has a main secondary winding (0.1(0.1/ √ 3) kV) and an auxiliary secondary winding (0.1/ √ 3(0.1/3)-0.1(0.1/ √ 3) kV).When doing the unearthed voltage transformer use, the user just can reach the requirement that secondary is exported 0.1 kV as long as connect head, the end of main secondary winding, assists the tap ground connection of secondary winding this moment; Two 0.1kV outputs only need connect head, the end of auxiliary secondary winding as needs, and auxiliary secondary winding and main secondary winding are exported 0.1kV simultaneously; When using as earthed voltage transformer, the head of main secondary winding, terminal secondary are output as 0.1/ √, 3 kV, and auxiliary secondary winding head end and tap terminals are formed earthed voltage transformer residue winding, and the residue winding is output as 0.1/3 kV and shields.
Embodiment illustrated in fig. 2 two, a kind of 3-35kV electromagnetic multifunctional voltage transformer comprises iron core 11, winding 21, main secondary winding 31,32 and an auxiliary secondary winding 41.One time winding 21, main secondary winding 31,32 and auxiliary secondary winding 41 all are around on the iron core, iron core 11 is a rectangle iron core, main secondary winding 31,32 numbers of turn are identical with auxiliary secondary winding 41 numbers of turn, have tap 51 on the auxiliary secondary winding 41, the tap 51 of auxiliary secondary winding is not on-state simultaneously with the end of auxiliary secondary winding.
With a 10(10/ √ 3) kV electromagnetic multifunctional voltage transformer is example, it has two main secondary winding (0.1(0.1/ √ 3) kV) and an auxiliary secondary winding (0.1/ √ 3(0.1/3)-0.1(0.1/ √ 3) kV).When doing the unearthed voltage transformer use, the user just can reach the requirement that secondary is exported 0.1 kV as long as connect head, the end of two main secondary winding, assists the tap ground connection of secondary winding this moment; Three 0.1kV outputs only need connect auxiliary secondary winding head, end again as needs, and two main secondary winding and an auxiliary secondary winding are exported 0.1kV simultaneously; When using as earthed voltage transformer, the head of two main secondary winding, end all are output as 0.1/ √, 3 kV, and earthed voltage transformer residue winding is formed in auxiliary secondary winding head end and tap, and the residue winding is output as 0.1/3 kV and shields.
Claims (5)
1. 3-35kV electromagnetic multifunctional voltage transformer, comprise iron core, winding and main secondary winding, winding and main secondary winding all are around on the iron core, it is characterized in that: also be wound with an auxiliary secondary winding on the described iron core, have tap on the auxiliary secondary winding.
2. 3-35kV electromagnetic multifunctional voltage transformer according to claim 1 is characterized in that: described iron core is a rectangle iron core.
3. 3-35kV electromagnetic multifunctional voltage transformer according to claim 1 is characterized in that: described main secondary winding is one or many.
4. according to claim 1 or 3 described 3-35kV electromagnetic multifunctional voltage transformers, it is characterized in that: the described main secondary winding number of turn is identical with the auxiliary secondary winding number of turn.
5. 3-35kV electromagnetic multifunctional voltage transformer according to claim 1 is characterized in that: the tap of described auxiliary secondary winding and the end of auxiliary secondary winding are not on-state simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200580545U CN202034222U (en) | 2011-03-08 | 2011-03-08 | 3-35kV multifunctional electromagnetic voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200580545U CN202034222U (en) | 2011-03-08 | 2011-03-08 | 3-35kV multifunctional electromagnetic voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202034222U true CN202034222U (en) | 2011-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200580545U Expired - Lifetime CN202034222U (en) | 2011-03-08 | 2011-03-08 | 3-35kV multifunctional electromagnetic voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202034222U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368431A (en) * | 2011-03-08 | 2012-03-07 | 江苏科兴电器有限公司 | 3-35kV electromagnetic multi-functional voltage transformator |
-
2011
- 2011-03-08 CN CN2011200580545U patent/CN202034222U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368431A (en) * | 2011-03-08 | 2012-03-07 | 江苏科兴电器有限公司 | 3-35kV electromagnetic multi-functional voltage transformator |
| CN102368431B (en) * | 2011-03-08 | 2013-06-19 | 江苏科兴电器有限公司 | 3-35kV electromagnetic multi-functional voltage transformator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111109 Effective date of abandoning: 20130619 |
|
| RGAV | Abandon patent right to avoid regrant |