CN207425577U - A kind of voltage transformer - Google Patents
A kind of voltage transformer Download PDFInfo
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- CN207425577U CN207425577U CN201721461331.0U CN201721461331U CN207425577U CN 207425577 U CN207425577 U CN 207425577U CN 201721461331 U CN201721461331 U CN 201721461331U CN 207425577 U CN207425577 U CN 207425577U
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- voltage
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- isolating transformer
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- capacitance
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Abstract
The utility model is related to a kind of voltage transformers, including A, B, C three-phase terminals, first winding, iron core, secondary winding, high-voltage capacitance, low-voltage capacitance, isolating transformer, the both ends connection A of first winding, B, arbitrary two-phase in C three-phase terminal, secondary winding corresponds to first winding and iron core coiling, the external measurement in both ends of secondary winding or power supply interface, A, B, C three-phase terminals connects three high-voltage capacitances respectively, three high-voltage capacitances merge connection low-voltage capacitance and are followed by isolating transformer primary side winding one end, the isolating transformer primary side winding other end is grounded, the external residual voltage interface of isolating transformer vice-side winding.
Description
Technical field
The utility model is related to a kind of voltage transformers.
Background technology
In recent years, electric system develops to miniaturization, intelligent, digitized direction, electronic technology and computer
Technology is widely used in electric system and distribution automation system, and voltage transformer has become mating electric system
In important equipment.Mainly using electromagnetic potential transformer in electric system, but limited by sensing basis mechanism, traditional electromagnetism
Formula voltage transformer is with volume is big, dynamic range is small, easy generation ferromagnetic resonance causes overvoltage and output terminal shortcircuit etc. to lack
Point.On the other hand, with the fast development of microcomputer protective relay technology and modern microelectronic technology, relay protection and double measurement
Device no longer needs high-power driving, the secondary output of traditional threephase potential transformer for 100V or 100/ √ 3V voltage signals not
Can directly it be connected with microcomputer, it is difficult to adapt to electric system miniaturization, digitlization, intelligentized development trend.
The content of the invention
The utility model provide it is a kind of full simple in structure, can full left set polyphase circuit measurement, protect, take into account secondary set
Available can and gather the voltage transformer of residual voltage operation.
The technical solution adopted in the utility model is：A kind of voltage transformer, it is characterised in that：Connect including A, B, C tri-
Line terminals, first winding, iron core, secondary winding, high-voltage capacitance, low-voltage capacitance, isolating transformer, the both ends connection of first winding
A, the arbitrary two-phase in B, C three-phase terminal, secondary winding correspond to first winding and iron core coiling, outside the both ends of secondary winding
Measurement or power supply interface are connect, A, B, C three-phase terminal connect three high-voltage capacitances respectively, and it is low that three high-voltage capacitances merge connection
Voltage capacitance is followed by isolating transformer primary side winding one end, isolating transformer primary side winding other end ground connection, isolating transformer secondary
The external residual voltage interface of winding.
Fuse built in A, B, C three-phase terminal.
Described A, C connect line terminals using the big umbellule umbrella skirt construction of tilting, and B wire connection terminals mutually use rectilinear big umbellule
Umbrella skirt construction.
The measurement or power supply interface are aviation socket.
The residual voltage interface is aviation socket.
The utility model is earth-free using first winding and two terminate in A, B, C three-phases after the voltage of arbitrary two-phase, through two
Secondary winding output measurement and the power supply to other control devices；Using principle of capacitive divider, by low pressure after three high-voltage capacitances
Capacitance connection isolating transformer gathers three-phase residual voltage, output voltage 0-6.5V.The mutual inductor is meeting quarter-phase circuit
Measurement, protection and in the case of the energy supply of secondary device, can also gather residual voltage.
Description of the drawings
Fig. 1 is the utility model structure diagram.
In figure：Three-phase terminal A, B, C, once set group 1, iron core 2, secondary winding 3, high-voltage capacitance 4, low-voltage capacitance 5,
Isolating transformer 6, primary side winding 7, vice-side winding 8, fuse 9.
Specific embodiment
It is described further below in conjunction with drawings and examples.
Shown in Fig. 1：A kind of voltage transformer includes A, B, C three-phase terminal, first winding 1, iron core 2, secondary winding
3rd, high-voltage capacitance 4, low-voltage capacitance 5, isolating transformer 6, fuse 9 built in A, B, C three-phase terminal, the two of first winding 1
A, B two-phase wire connection terminal in end connection A, B, C three-phase terminal, secondary winding 3 correspond to first winding 1 and 2 coiling of iron core,
The external measurement in both ends of secondary winding 3 or power supply interface, A, B, C three-phase terminal connect three high-voltage capacitances 4 respectively, three
High-voltage capacitance merges connection low-voltage capacitance 5 and is followed by 6 primary side winding of isolating transformer, 7 one end, and isolating transformer primary side winding 7 is another
End ground connection, 8 external residual voltage interface of isolating transformer vice-side winding.
On the basis of above-described embodiment, A, C line terminals that connect can be designed using the big umbellule umbrella skirt construction of tilting, B wiring
Terminal can be mutually designed using rectilinear big umbellule umbrella skirt construction.
On the basis of above-described embodiment, measurement or power supply interface may be designed as aviation socket.
On the basis of above-described embodiment, residual voltage interface may be designed as aviation socket.
Claims (5)
1. a kind of voltage transformer, it is characterised in that：Including A, B, C three-phase terminal, first winding, iron core, secondary winding,
High-voltage capacitance, low-voltage capacitance, isolating transformer, the both ends of first winding connect the arbitrary two-phase in A, B, C three-phase terminal,
Secondary winding corresponds to first winding and iron core coiling, the external measurement in both ends of secondary winding or power supply interface, tri- phase connection of A, B, C
Terminal connects three high-voltage capacitances respectively, and three high-voltage capacitances merge connection low-voltage capacitance and are followed by isolating transformer primary side winding one
End, isolating transformer primary side winding other end ground connection, the external residual voltage interface of isolating transformer vice-side winding.
2. a kind of voltage transformer according to claim 1, it is characterized in that：It is melted built in A, B, C three-phase terminal
Disconnected device.
3. a kind of voltage transformer according to claim 1, it is characterized in that：Described A, C connect line terminals using tilting
Big umbellule umbrella skirt construction, B wire connection terminals mutually use rectilinear big umbellule umbrella skirt construction.
4. a kind of voltage transformer according to claim 1, it is characterized in that：The measurement or power supply interface are inserted for aviation
Seat.
5. a kind of voltage transformer according to claim 1, it is characterized in that：The residual voltage interface is aviation socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721461331.0U CN207425577U (en) | 2017-11-06 | 2017-11-06 | A kind of voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721461331.0U CN207425577U (en) | 2017-11-06 | 2017-11-06 | A kind of voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207425577U true CN207425577U (en) | 2018-05-29 |
Family
ID=62307319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721461331.0U Active CN207425577U (en) | 2017-11-06 | 2017-11-06 | A kind of voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207425577U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107768099A (en) * | 2017-11-06 | 2018-03-06 | 江苏科兴电器有限公司 | A kind of voltage transformer |
| CN110031661A (en) * | 2019-03-13 | 2019-07-19 | 浙江天际互感器有限公司 | A kind of voltage transformer being isolated with high pressure and low pressure |
-
2017
- 2017-11-06 CN CN201721461331.0U patent/CN207425577U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107768099A (en) * | 2017-11-06 | 2018-03-06 | 江苏科兴电器有限公司 | A kind of voltage transformer |
| CN110031661A (en) * | 2019-03-13 | 2019-07-19 | 浙江天际互感器有限公司 | A kind of voltage transformer being isolated with high pressure and low pressure |
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