CN106560903B - Current transformer with auxiliary voltage instruction in or used in high-tension apparatus - Google Patents
Current transformer with auxiliary voltage instruction in or used in high-tension apparatus Download PDFInfo
- Publication number
- CN106560903B CN106560903B CN201610847741.2A CN201610847741A CN106560903B CN 106560903 B CN106560903 B CN 106560903B CN 201610847741 A CN201610847741 A CN 201610847741A CN 106560903 B CN106560903 B CN 106560903B
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- China
- Prior art keywords
- current transformer
- shielding
- primary
- output line
- capacitor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The current transformer with auxiliary voltage instruction is used in intermediate or high voltage installation the invention discloses a kind of.The present invention relates to a kind of current transformer, preamble according to claim 1 has the function of auxiliary voltage instruction or for using in intermediate or high voltage installation, having primary cross-talk and primary conductor and secondary circuit.In order to reduce the number of required component and in order to support to standardize, in the manufacture of current transformer, the present invention is, beside secondary circuit, the output line (4) of shielding is arranged such that output line (4) is electrically connected to one end of discrete primary condenser (C1), wherein, capacitor (C1) is connected between primary conductor (2) and output line (4), and the capacitor being limited between primary conductor (2) and output line (4), the shielding (4 ') of output line (4) are connected to ground terminal (6).
Description
Technical field
The present invention relates to current transformer, preamble according to claim 1 is attached using having in or in high-tension apparatus
Making alive instruction has primary terminals and primary conductor and current transformer core.
Background technique
With voltage instruction current transformer be it is well known, wherein voltage instruction realized by copper mesh, formed capacitance electrode,
It measures the capacitor between the copper mesh and the primary conductor of current transformer.Because current transformer is designed with primary conductor
Many options and different capacitance requirements be suitable for different voltage levels, so there are the variants of many capacitor net electrodes
It is used for the manufacture of such current transformer.
A large amount of variants result in the complexity and many different but similar shapes of purchase of manufacture.
Summary of the invention
So the object of the present invention is in manufacture in current transformer, part count required for reducing and prop up
Hold standardization.
The problem is solved by the feature of claim.
Other embodiments are mentioned in the dependent claims.
Therefore, essential characteristic of the invention combination is that, on the side of current transformer, output conductor is arranged such that defeated
Conductor is electrically connected to a part of divider out, to be used for voltage instruction and voltage measurement, by being located at current transformer master
At least one intracorporal discrete capacitor is constituted, and is arranged such that it is provided required for voltage instruction system from primary
The primary capacitor of conductor.The capacitor of divider secondary is completely or at least partially located at outside current transformer main body.
In order to realize required primary capacitance profile, two or more discrete capacitors can also be used.It is such
Capacitor can be connected in series or in parallel.The additional discrete capacitor connected between primary condenser and ground can also be used
Device, in order to adjust secondary electrical capacitance, so as to adjust the voltage ratio of divider.In order to realize required secondary capacitance distribution,
Two or more discrete capacitors being connected in series or in parallel can also be used.
In a further beneficial embodiment, output conductor is reduced the design of transformer or miscellaneous in the output of divider by shielding
The influence of spurious capacitance, and to influence the performance or parameter of voltage indicator.The conductive shield of such output conductor is connected
It is connected to ground potential.
In another important and advantageous embodiment, between primary and secondary capacitor or multiple capacitors and/or
Conductive connection between primary conductor and primary condenser is provided with temperature compensation element.
According to the high current by current transformer, the temperature of the variation of current transformer may occur, and produce in electricity
The various expansions of the material used in current transformer.The shadow of voltage instruction and/or such expansion on used capacitor
Sound is compensated by aforementioned temperature compensation element.
About more in this way, advantageous embodiment is that the temperature compensation element is arranged to spiral or helical spring
Shape conductor.
High expansion rate can be compensated by relatively short and compact element as a result,.
In a further beneficial embodiment, current transformer and voltage indicator are mounted setting on a support element
There is ground terminal.
In the last one advantageous embodiment, current transformer and voltage indicator and support component and ground connection
Terminal and another connection terminal are molded in public housing.
In short, obtaining lot of advantages from the present invention.
The voltage instruction of current transformer is reduced in many variations.The geometry of primary conductor and grounded parts
Dependence is eliminated.
In addition it is possible to use standarized component, and mold simpler.The value of capacitor generates higher stability.Electric current is mutual
Sensor needs less space.
Furthermore, it is not necessary that the assembling inspection before casting, does not need the manual setting of geometry.
Detailed description of the invention
An advantageous embodiment of the invention is shown in the accompanying drawings.
Fig. 1: the perspective view of current transformer
Fig. 2: the current transformer perspective view only with voltage instruction function
Fig. 3: the electrical arrangement of the voltage indicative character in current transformer
Specific embodiment
Fig. 1 shows the perspective view of current transformer 1.Primary terminals 2 are connected to across at least one secondary circuit 3 '
Primary conductor 2 '.Secondary circuit 3 ' is connected to secondary terminal 3.
The shielding output line 4 of cable form is arranged to other and/or close to secondary circuit and secondary close to secondary circuit 3 '
By the conducting wire that terminal 3 connects, so that the shielding output line 4 of cable form is electrically connected to divider 5 and indicates as voltage
Device is made of the primary capacitor C1 and secondary capacitance C2 of arranged in series, so that primary condenser C1 is generated in primary conductor 2 '
Capacitor between shielding output line 4, and secondary capacitor C2 (if use) generates the shielding output line 4 in cable form
Capacitor between ground terminal 6.
Divider 5 is arranged as including the primary condenser C1 being cascaded and secondary capacitor C2 in straight line
Divider, it is meant that be connected in series.
The upper end of divider 5 is electrically connected to primary conductor via HV connection 8, and downside is connected to ground terminal 6.
Divider is connected to its intermediate point between primary condenser C1 and secondary capacitor C2 and shielding outlet 4.Shielding output
Line 4 can also be shielded, and be referred in order to reduce stray electrical perhaps current transformer design to the performance and voltage of voltage indicator
Show the influence of device.Ground terminal 6 can be positioned as close to the secondary terminal 3 of secondary capacitor C2 or close.
Divider 5 is connect with the above-mentioned upper end of primary conductor 2 ' (winding) by may be constructed such that expansion compensation element 7
Conducting element realize.Expansion compensation element 7 is formed with spiral shape or cylindrical screw shape form of springs.
The lower end of divider is electrically connected to ground terminal 6.
Another possible application or shell Fig. 2 shows above-mentioned new voltage divider arrangement.The application/product provides electricity
The function of instruction is pressed, and does not include any current transformer, does not thus include the secondary circuit of current transformer.
Fig. 3 shows the electrical arrangement for considering the divider 5 using shielding output line and secondary capacitor C2.Preferred real
It applies in example and its simplest form, the composition of voltage instruction function is only made of shielding output line 4 and primary condenser C1.?
In another preferred embodiment, secondary capacitor C2 is also used for more accurately limiting secondary capacitance, and/or the shielding of shielding output line
For avoiding the influence of the peripheral parts from current transformer.
Appended drawing reference:
1 current transformer
2 primary terminals
2' armature winding
3 grade terminals
3' secondary circuit
4 output conductors, output line
The shielding of 4' output conductor
5 divider (voltage indicator)
6 ground terminals
7 expansion compensation elements (conducting element)
The HV connection of 8 pairs of primary terminals
C1 primary condenser
C2 secondary capacitor
Claims (8)
1. a kind of current transformer has for the capacitive divider of voltage measurement or for making in or in high voltage installation
With, and there is primary terminals (2) and primary conductor (2 ') and secondary circuit (3 '),
It is characterized in that,
Beside the secondary circuit (3 '), the primary terminals (2) are connected to the primary conductor (2 '), and the primary is led
Body (2 ') passes through at least one secondary circuit (3 '), and the secondary circuit (3 ') is connected to secondary terminal (3), the output of shielding
Line (4) is arranged such that the output line (4) of the shielding is electrically connected to the end of discrete primary condenser (C1),
In, the discrete primary condenser (C1) is connected between primary conductor (2 ') and the output line (4) of the shielding, and limits
The capacitor being scheduled between the primary conductor (2 ') and the output line (4) of the shielding, wherein the output line (4) of the shielding
Shielding (4 ') is connected to ground terminal (6), so that the output line (4) of the shielding is arranged to close to secondary circuit (3 ')
By the other and/or conducting wire that is connect close to the secondary circuit (3 ') with the secondary terminal (3), so that the shielding it is defeated
Outlet (4) is electrically connected to the divider (5) as voltage indicator, the divider by arranged in series the discrete primary electrical
Container (C1) and discrete secondary capacitor (C2) are constituted, so that the discrete primary condenser (C1) is generated in the primary conductor
Capacitor between the output line (4) of (2 ') and the shielding, and the discrete secondary capacitor (C2) is generated in the shielding
Output line (4) and the ground terminal (6) between capacitor, and in the primary conductor (2 ') and the discrete primary electrical
Conductive connection between container (C1) is provided with the first temperature compensation element.
2. current transformer according to claim 1, which is characterized in that in the discrete primary condenser (C1) and described
The second at least partly non-conductive temperature compensation element, second thermal expansion are connected between ground terminal (6)
Compensating element, has the form of spiral or cylindrical conductor.
3. current transformer according to claim 1, which is characterized in that the discrete secondary capacitor (C2) is also used
And it is connected between the output line (4) of the shielding and the ground terminal (6), to limit or adjust in the shielding
Output line (4) and the ground terminal (6) between capacitor.
4. current transformer according to claim 3, which is characterized in that in the discrete primary condenser (C1) and described
Conductive connection between discrete secondary capacitor (C2) is provided with third temperature compensation element, the third temperature compensation member
Part has the form of spiral or cylindrical conductor.
5. current transformer according to claim 1,2 or 4, which is characterized in that the first temperature compensation element quilt
It is arranged as spiral or cylindrical conductor.
6. current transformer according to any one of claim 1 to 4, which is characterized in that the current transformer (1) with
And the divider (5) is installed on U-shaped supporting element, the U-shaped supporting element is provided with ground terminal.
7. current transformer according to claim 6, which is characterized in that the current transformer and the divider
(5) and the ground terminal of the U-shaped supporting element is molded in public housing.
8. current transformer according to any one of claim 1 to 4, which is characterized in that the divider (5) can be used
In voltage measurement.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15188241.2 | 2015-10-02 | ||
| EP15188241.2A EP3151255B1 (en) | 2015-10-02 | 2015-10-02 | Current transformer with additional voltage indication for the use in medium or high voltage equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106560903A CN106560903A (en) | 2017-04-12 |
| CN106560903B true CN106560903B (en) | 2019-07-19 |
Family
ID=54260655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610847741.2A Active CN106560903B (en) | 2015-10-02 | 2016-09-23 | Current transformer with auxiliary voltage instruction in or used in high-tension apparatus |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3151255B1 (en) |
| CN (1) | CN106560903B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107749341A (en) * | 2017-10-18 | 2018-03-02 | 湖北大二互科技股份有限公司 | A kind of current transformer that powered display signal can be provided |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3500197A (en) * | 1968-04-29 | 1970-03-10 | Del Electronics | Integrated high voltage transformer and capacitor divider |
| JPS57167612A (en) * | 1981-04-08 | 1982-10-15 | Mitsubishi Electric Corp | Winding composition of stationary induction apparatus |
| CN102066954A (en) * | 2008-06-19 | 2011-05-18 | Abb技术有限公司 | A combined electrical measurement device |
| CN102983001A (en) * | 2012-11-30 | 2013-03-20 | 苏州福瑞互感器有限公司 | Self-adaption temperature compensating capacitor |
| CN203950688U (en) * | 2014-07-01 | 2014-11-19 | 浙江大荣电气有限公司 | A kind of novel high-pressure power capacitor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2969460A (en) * | 1957-10-14 | 1961-01-24 | Collins Radio Co | Adjustable high-frequency tuning unit |
| DE4123812C2 (en) * | 1991-07-18 | 1993-10-28 | Bosch Gmbh Robert | transformer |
| US6737648B2 (en) * | 2000-11-22 | 2004-05-18 | Carnegie Mellon University | Micromachined infrared sensitive pixel and infrared imager including same |
| US8000102B2 (en) * | 2009-08-20 | 2011-08-16 | Babcock & Wilcox Power Generation Group, Inc. | Apparatus and arrangement for housing voltage conditioning and filtering circuitry components for an electrostatic precipitator |
| PL2693223T3 (en) * | 2012-08-03 | 2022-01-10 | Abb Schweiz Ag | Voltage measurement device with an insulating body |
| EP2703208A1 (en) * | 2012-09-04 | 2014-03-05 | ABB Technology AG | Controlling a modular converter |
-
2015
- 2015-10-02 EP EP15188241.2A patent/EP3151255B1/en active Active
-
2016
- 2016-09-23 CN CN201610847741.2A patent/CN106560903B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3500197A (en) * | 1968-04-29 | 1970-03-10 | Del Electronics | Integrated high voltage transformer and capacitor divider |
| JPS57167612A (en) * | 1981-04-08 | 1982-10-15 | Mitsubishi Electric Corp | Winding composition of stationary induction apparatus |
| CN102066954A (en) * | 2008-06-19 | 2011-05-18 | Abb技术有限公司 | A combined electrical measurement device |
| CN102983001A (en) * | 2012-11-30 | 2013-03-20 | 苏州福瑞互感器有限公司 | Self-adaption temperature compensating capacitor |
| CN203950688U (en) * | 2014-07-01 | 2014-11-19 | 浙江大荣电气有限公司 | A kind of novel high-pressure power capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3151255A1 (en) | 2017-04-05 |
| CN106560903A (en) | 2017-04-12 |
| EP3151255B1 (en) | 2024-06-05 |
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