CN207051352U - A kind of equipotential shielded type composite electronic type voltage transformer - Google Patents
A kind of equipotential shielded type composite electronic type voltage transformer Download PDFInfo
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- CN207051352U CN207051352U CN201720401577.2U CN201720401577U CN207051352U CN 207051352 U CN207051352 U CN 207051352U CN 201720401577 U CN201720401577 U CN 201720401577U CN 207051352 U CN207051352 U CN 207051352U
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Abstract
The utility model aims to provide a kind of strong antijamming capability, applied in 10kV power circuits and meeting the equipotential shielded type composite electronic type voltage transformer of grid automation management requirement.It includes high-tension resistive core and electro-magnetic shielding cover, high-tension resistive core includes high-field electrode, low-field electrode and ground wire electrode, high-voltage arm resistance is serially connected between high-field electrode and low-field electrode, low-voltage arm electrode is serially connected between low-field electrode and ground wire electrode, high-tension resistive in-core is additionally provided with the main body containing several chambers, metallic diaphragm is provided with the internal face of each chamber, bucking electrode is led on every layer of metallic diaphragm, shielding resistance is also serially connected between high-field electrode and ground wire electrode, high-pressure side of each bucking electrode accordingly with corresponding shielding resistance is connected, high-voltage arm resistance is made up of the number Alloy Foil resistance consistent with the number of chamber, all Alloy Foil resistance are arranged in correspondence with each chamber.The utility model is applied to electrical equipment.
Description
Technical field
Electrical equipment is the utility model is related to, more particularly to a kind of equipotential shielded type composite electronic type voltage mutual inductance
Device.
Background technology
Voltage transformer is the important sensor that electric energy metrical and relay protection are carried out in power system, its accuracy, can
Safe and reliable operation by property, long-term working stability and power system is closely related.The voltage commonly used in power circuit is mutual
Sensor uses electromagnetic potential transformer, and electromagnetic potential transformer make use of electromagnetic induction principle, by changing iron core a's
First winding n1 and secondary winding n2 coils turn ratio, realize high voltage U1 being converted to low-voltage U2, for low pressure measurement instrument
Table carries out electric parameter measurement, and the parameters of electric power of a circuit, such as Fig. 1 are actually measured by the coupling between a secondary coil
It is shown.But there is following defect in traditional electromagnetic potential transformer：
1. in actual use, often transformer iron core magnetic is caused to be satisfied due to some accidental factors in circuit
With, and then cause ferromagnetic resonance and transformer explosion occurs, cause great security incident.
2. being limited by electromagnetic potential transformer principle, its accuracy of measurement grade is relatively low, it is difficult to meets electric power
The demand of Automated fine management aspect.
3. usage amount is very big in power system due to voltage transformer, to need to consume substantial amounts of non-ferrous metal, into
This is high.
4. it is bulky, from factory's manufacture, transport to links such as in-site installation, maintenances, inconvenience be present.
Utility model content
Technical problem to be solved in the utility model is overcome the deficiencies in the prior art, there is provided a kind of precision is high, temperature
Characteristic is good, strong antijamming capability, can be applied in 10kV power circuits and can meet the equipotential of grid automation management requirement
Shielded type composite electronic type voltage transformer.
Technical scheme is used by the utility model：The utility model includes high-tension resistive core and electro-magnetic shielding cover, institute
The periphery that electromagnetic shielding is located at the high-tension resistive core is stated, the high-tension resistive core includes high-field electrode, low-field electrode and ground
Line electrode, high-voltage arm resistance, the low-field electrode and ground wire electricity are serially connected between the high-field electrode and low-field electrode
Low-voltage arm electrode is serially connected between pole, the high-tension resistive in-core is additionally provided with the main body containing several chambers, in each institute
State and metallic diaphragm is provided with the internal face of chamber, bucking electrode is led on every layer of metallic diaphragm, in the height
The number shielding resistance consistent with the number of the chamber is also serially connected between piezoelectricity pole and the ground wire electrode, wherein n is institute
The number of chamber is stated, high-pressure side of each bucking electrode accordingly with the corresponding shielding resistance is connected, the height
Pressure arm resistance is made up of the number Alloy Foil resistance consistent with the number of the chamber, and wherein n is the number of the chamber, and n is individual
The Alloy Foil resistance is arranged in correspondence with each chamber, and the whole high-tension resistive core is coated with one layer of asphalt mixtures modified by epoxy resin
Lipid layer.
Such scheme is visible, coats whole high-tension resistive core using epoxy resin layer, this enables whole resistor core to keep away
Exempt to contact with the air in the external world and steam etc., influenceed by environment factor minimum, can adapt to the application in 10kV power circuits；
Further, since Alloy Foil resistance has the characteristics of stability is good, without induction reactance, low electric capacity, good quick heat endurance, using Alloy Foil
Resistance can fully meet in circuit to the requirement in terms of resistance precision and temperature coefficient as high-voltage arm resistance, ensure mutual inductance
The stable signal of device output, and ensure the long-term working stability of transformer, it disclosure satisfy that the requirement of grid automation management；This
Outside, it uses electro-magnetic shielding cover to shield the signal source of periphery, has extremely strong antijamming capability, its service life is protected
Card.
Further, the main body includes resistance board and is symmetrically arranged at two asphalt mixtures modified by epoxy resin of the resistance board both sides
Aliphatic radical body forms, and the number of the chamber set on two epoxy resin-bases is consistent, two epoxy resin-matrixes
After body coordinates with the resistance board respectively, each chamber forms single-chamber equivalent potential screen room.
Such scheme is visible, and using two epoxy resin-bases and resistance board of mutual cooperation with synthesis main body, it is tied
Structure is simple, and the single-chamber equivalent potential screen room that the chamber, the resistance board on two matrixes complement each other to form, and offsets well
The equivalent resistance that packing material is formed influences also to play interference signal fabulous anti-shielding effect to caused by main circuit,
Significantly reduce resistor core is influenceed by external environment, further increases stability and reliability.
Yet further, the electro-magnetic shielding cover includes an electric screen and secondary electric screen, and an electric screen is arranged on institute
State on one end of the setting high-field electrode of high-tension resistive core, the secondary electric screen is arranged on the setting of the high-tension resistive core
On one end of the ground wire electrode；Electric screen and the secondary electric screen are metal cover body, and the metal cover body is by some
Interlaced bonding jumper or metal wire, which is crowded around, to be formed.
Such scheme is visible, the setting of equipotential chamber, an electric screen and secondary electric screen, and high-tension resistive core can be carried out
Composite shielding reduces the influence of extraneous installation environment and electric field environment to circuit measuring precision and stability, improves its measurement essence
Degree.
Again yet further, after the high-tension resistive core, an electric screen and the secondary electric screen overall co-ordination
Periphery is also filled with epoxy resin layer and forms the equipotential shielded type composite electronic type voltage transformer.
Such scheme is visible, and whole equipment is filled with epoxy resin, first, ensureing to meet high-field electrode and low pressure
Pressure-resistant and electric clearance requirement between electrode, and further protection can be formed to internal structure, it can obstruct steam
Deng device interior is entered, the stability of its service life and equipment is ensure that, its structure is also simple and beautiful.
Brief description of the drawings
Fig. 1 is the principle schematic that existing electromagnetic potential transformer utilizes electromagnetic induction；
Fig. 2 is the principle schematic that the utility model uses electric resistance partial pressure；
Fig. 3 is the simple circuit schematic diagram of the high-tension resistive in-core；
Fig. 4 is the easy structure schematic diagram of the high-tension resistive core；
Fig. 5 is the embedded simple structural representation of the equipotential shielded type composite electronic type voltage transformer；
Fig. 6 is the easy structure schematic diagram at the first visual angle of the epoxy resin-base；
Fig. 7 is the easy structure schematic diagram at the second visual angle of the epoxy resin-base；
Fig. 8 is the integral outer structural representation of the equipotential shielded type composite electronic type voltage transformer；
Fig. 9 is the easy structure schematic diagram of the main body.
Embodiment
As shown in Fig. 2 to Fig. 9, the utility model includes high-tension resistive core 1 and electro-magnetic shielding cover, and the electro-magnetic shielding cover is set
In the periphery of the high-tension resistive core 1.In the present embodiment, the electro-magnetic shielding cover includes an electric screen 10 and secondary electric screen
11, an electric screen 10 and the secondary electric screen 11 are metal cover body, and the metal cover body is by some interlaced metals
Bar or metal wire, which are crowded around, to be formed.The high-tension resistive core 1 includes high-field electrode 2, low-field electrode 3 and ground wire electrode 4.In this implementation
In example, an electric screen 10 is arranged on one end of the setting high-field electrode 2 of the high-tension resistive core 1, described secondary
Electric screen is arranged on one end of the setting ground wire electrode 4 of the high-tension resistive core 1.In the high-field electrode 2 and low tension
High-voltage arm resistance R is serially connected between pole 3H, low-voltage arm electrode R is serially connected between the low-field electrode 3 and the ground wire electrode 4L,
The main body containing several chambers 5 is additionally provided with the high-tension resistive core 1, is all provided with the internal face of each chamber 5
Metallic diaphragm 7 is equipped with, bucking electrode 8 is led on every layer of metallic diaphragm 7, in the high-field electrode 2 and the ground wire
The number shielding resistance R consistent with the number of the chamber 5 is also serially connected between electrode 4P1……RPn, wherein n is the chamber
5 number, high-pressure side of each bucking electrode 8 accordingly with the corresponding shielding resistance are connected, the high-voltage arm
Resistance is by the number Alloy Foil resistance R consistent with the number of the chamber 5H1……RHnComposition, wherein n are of the chamber 5
Number, the n Alloy Foil resistance RH1……RHnIt is arranged in correspondence with each chamber 5.Wherein, the number of chamber 5 is set
Can as the case may be depending on, the resistance number that is mainly included according to high-voltage arm resistance and set.Herein, the alloy
Paper tinsel resistance is different from general resistance, and it is by micro-electronic mechanical system technique, in the Alloy Foil using higfh-tension ceramics as matrix
Upper design circuit board figure, a kind of high accuracy obtained is then processed by laser etching processes, there is fabulous hot properties
Alloy Foil noninductive resistance, it has fabulous stability and reliability.The whole high-tension resistive core 1 is coated with one layer of epoxy
Resin bed 9.
In the present embodiment, the main body includes resistance board 12 and is symmetrically arranged at the two of the both sides of resistance board 12
Individual epoxy resin-base 6 forms, and the number of the chamber 5 set on two epoxy resin-bases 6 is consistent, described in two
After epoxy resin-base 6 coordinates with the resistance board 12 respectively, each chamber forms single-chamber equivalent potential screen room.Complete
After the cooperation of two epoxy resin-bases 6, then by die package in epoxy resin inclusion enclave, this can be avoided steam
Into high-tension resistive in-core, the structure of high-tension resistive in-core is preferably protected.In addition, coated using epoxy resin layer high
The structure of piezoresistance core, forms it into modularization, cost savings installation cost and cost of labor for subsequent use, also greatly
The earth reduces the labor intensity of staff.
Also filled out in periphery after the high-tension resistive core 1, an electric screen 10 and the overall co-ordination of secondary electric screen 11
Filled with epoxy resin layer 9 and form the equipotential shielded type composite electronic type voltage transformer.In the present embodiment, it is arranged on
Periphery this layer of epoxy resin layer be in voltage transformer mould, encapsulated, solidified with poured with epoxy resin, be finally stripped and
Into.
The utility model has the following advantages that：
1. not having magnetic saturation phenomenon, resonance and blast will not occur, it is safe to use, reliable；
2. Hz-KHz is wide, measurement range is big, and the linearity is good, and output accuracy is high, suitable for the automation essence of power system
Thin regulatory requirement；
3. small volume, in light weight, saving space, manufacturing cost are low；
4. power is small, energy consumption is low, and can save a large amount of valuable non-ferrous metals；
5. easy to install, maintenance cost is low.
The utility model is applied to electrical equipment.
Claims (5)
- A kind of 1. equipotential shielded type composite electronic type voltage transformer, it is characterised in that：It includes high-tension resistive core（1）And electricity Magnetic shielding cover, the electromagnetic shielding are located at the high-tension resistive core（1）Periphery, the high-tension resistive core（1）Including high pressure Electrode（2）, low-field electrode（3）And ground wire electrode（4）, in the high-field electrode（2）And low-field electrode（3）Between be serially connected with high pressure Arm resistance, the low-field electrode（3）With the ground wire electrode（4）Between be serially connected with low-voltage arm electrode（RL）, the high-tension resistive Core（1）Inside it is additionally provided with containing several chambers（5）Main body, in each chamber（5）Internal face on be provided with gold Belong to film layer（7）, every layer of metallic diaphragm（7）On lead to bucking electrode（8）, in the high-field electrode（2）With described Line electrode（4）Between be also serially connected with number and the chamber（5）The consistent shielding resistance R of numberP1……RPn, wherein n is institute State chamber（5）Number, each bucking electrode（8）Accordingly the high-pressure side with the corresponding shielding resistance is connected, The high-voltage arm resistance is by number and the chamber（5）The consistent Alloy Foil resistance R of numberH1……RHnComposition, wherein n is The chamber（5）Number, n Alloy Foil resistance RH1……RHnIt is arranged in correspondence with each chamber（5）It is interior, it is whole The individual high-tension resistive core（1）It is coated with one layer of epoxy resin layer（9）.
- A kind of 2. equipotential shielded type composite electronic type voltage transformer according to claim 1, it is characterised in that：It is described Main body includes resistance board（12）Be symmetrically arranged at the resistance board（12）Two epoxy resin-bases of both sides（6）Group Into two epoxy resin-bases（6）The chamber of upper setting（5）Number it is consistent, two epoxy resin-bases （6）Respectively with the resistance board（12）After cooperation, each chamber forms single-chamber equivalent potential screen room.
- A kind of 3. equipotential shielded type composite electronic type voltage transformer according to claim 1, it is characterised in that：It is described Electro-magnetic shielding cover includes an electric screen（10）With secondary electric screen（11）, an electric screen（10）It is arranged on the high-tension resistive core （1）The setting high-field electrode（2）One end on, the secondary electric screen（11）It is arranged on the high-tension resistive core（1）Set Put the ground wire electrode（4）One end on.
- A kind of 4. equipotential shielded type composite electronic type voltage transformer according to claim 3, it is characterised in that：It is described Electric screen（10）With the secondary electric screen（11）For metal cover body, the metal cover body by some interlaced bonding jumpers or Metal wire, which is crowded around, to be formed.
- A kind of 5. equipotential shielded type composite electronic type voltage transformer according to claim 4, it is characterised in that：Institute State high-tension resistive core（1）, the electric screen（10）With the secondary electric screen（11）After overall co-ordination ring is also filled with periphery Oxygen tree lipid layer simultaneously forms the equipotential shielded type composite electronic type voltage transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720401577.2U CN207051352U (en) | 2017-04-18 | 2017-04-18 | A kind of equipotential shielded type composite electronic type voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720401577.2U CN207051352U (en) | 2017-04-18 | 2017-04-18 | A kind of equipotential shielded type composite electronic type voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207051352U true CN207051352U (en) | 2018-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720401577.2U Active CN207051352U (en) | 2017-04-18 | 2017-04-18 | A kind of equipotential shielded type composite electronic type voltage transformer |
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| CN (1) | CN207051352U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068718A (en) * | 2019-05-30 | 2019-07-30 | 山东联合电力技术有限公司 | A kind of electronic mutual inductor of electric resistance partial pressure |
-
2017
- 2017-04-18 CN CN201720401577.2U patent/CN207051352U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068718A (en) * | 2019-05-30 | 2019-07-30 | 山东联合电力技术有限公司 | A kind of electronic mutual inductor of electric resistance partial pressure |
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