CN202189673U - Electromagnetism-electron mixing current transformer - Google Patents
Electromagnetism-electron mixing current transformer Download PDFInfo
- Publication number
- CN202189673U CN202189673U CN 201120309633 CN201120309633U CN202189673U CN 202189673 U CN202189673 U CN 202189673U CN 201120309633 CN201120309633 CN 201120309633 CN 201120309633 U CN201120309633 U CN 201120309633U CN 202189673 U CN202189673 U CN 202189673U
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- CN
- China
- Prior art keywords
- current transformer
- coil
- electromagnetism
- iron core
- low
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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.)
- Expired - Lifetime
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- 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
Abstract
The utility model relates to an electromagnetism-electron mixing current transformer which is characterized in that a secondary common electromagnetic type iron core coil, a Rogowski coil or a low power iron core coil is fixed in a metallic shield cover, a one-time conducting rod penetrates through the center of the metallic shield cover, the secondary common electromagnetic type iron core coil penetrates through a cable of a secondary wire conduit to be connected with a wiring terminal arranged on a base, the Rogowski coil or the low power iron core coil is connected with a signal shielding wire that penetrates through the secondary wire conduit, and insulating medium is filled between a high-voltage end and a low-voltage end of the current transformer. The current transformer gives full play to the advantages of an electromagnetic type current transformer and an electronic type current transformer, so that the problem that the metering validity of the existing electric energy metering device which outputs in a digital quantity form and is formed by an electronic type transformer and a full digital type electric energy meter is not recognized by the metering and supervising department, the electric power enterprises and the power consumers is solved.
Description
Technical field
The utility model relates to a kind of current transformer, relates in particular to a kind of electromagnetism, electronics hybrid optoelectronic current transformer.
Background technology
Plurality of advantages such as electronic mutual inductor has that insulation property are good, volume mass is little, safety and environmental protection, transient characterisitics are good, wide frequency range, antijamming capability are strong are the developing direction of instrument transformer technology.Through studying for a long period of time both at home and abroad and trying out, electronic mutual inductor has got into the practicability stage at present, and electronic mutual inductor extensively operates in all kinds of the electrical power trans mission/distribution systems.According to the high-pressure side of electronic current mutual inductor needs power supply whether, electronic mutual inductor is divided into two kinds of active formula and passive types.It is generally acknowledged passive electrical minor current transformer in the past based on faraday (Faraday) magneto optical effect, the transducer of measuring primary current can adopt block glass or full optical fiber dual mode; Adopt Rogowsky (Rogowski) coil or low-power iron-core coil (LPCT) to classify as the active electronic current transformer in the past usually as the electronic mutual inductor of measuring transducer; Because they are all based on electromagnetic induction principle; The voltage signal that common requirement is exported transducer at high-pressure side is sampled and is converted digital signal into; Signal gathering unit and power supply thereof require to be arranged in the high-pressure side of instrument transformer, through optical fiber digital signal are sent to low-pressure side supply capability second protection, observing and controlling and metering system then.The active electronic current transformer that adopts Rogowsky coil or low-power iron-core coil is that the signal gathering unit of high-pressure side provides power supply that dual mode is arranged usually, and a kind of is to get and can supply power by coil through primary current; Another kind is to adopt high power laser power supply in low-pressure side, through the signal gathering unit power supply of optical fiber to high-pressure side.The active electronic current transformer has following obvious deficiency:
1) electronic devices and components such as signal gathering unit and power supply circuits thereof are arranged in high-pressure side, are in the strong jamming and the hot environment of high voltage, big electric current, and the interference free performance and life-span of electronic circuit and components and parts proposed very high requirement;
2) signal gathering unit and power supply circuits are in high-pressure side, and directly ground connection is in the electric potential floating state, anti-interference design of electronic circuits are required harsh;
3) the high power laser power supply cost for the signal gathering unit power supply is high, and useful life is generally shorter;
4) Laser Power Devices can switch the undesired output that causes electronic mutual inductor when supplying power easily by coil with getting.
For overcoming the problems referred to above of active electronic transformer, some producers develop passive electrical minor current transformer, its insulation system and the conventional electromagnetic current transducer basically identical that adopts Rogowsky coil or low-power iron-core coil both at home and abroad.Whole electronic circuits (comprising collecting unit and power supply thereof) of this passive electrical minor current transformer based on electromagnetic induction principle are in low-pressure end; Avoided electronic circuit to be in the strong jamming and the hot environment of high voltage, big electric current; And can ground connection; Make collecting unit and power supply thereof have stronger antijamming capability; Its supply power mode can adopt reliable direct current or AC power directly to supply power arbitrarily, need not use the high power laser power supply power supply, and the maintenance and the maintenance of collecting unit and power supply thereof is convenient in this design simultaneously.
But the passive electrical minor current transformer that adopts Rogowsky coil or low-power iron-core coil is in measurement stability, reliability, and aspects such as useful life are compared with the electromagnetic current transducer of routine, also have gap.
The particularly important is; The metering instrument transformer is as the measurement instrument of state compulsion calibrating; " Measurement Law of the People's Republic of China " and supporting law thereof, rules have strict administrative provisions, and relevant country, industry technology standard also have clear and definite specification requirement to metering instrument transformer and secondary circuit thereof.At present, the metering legitimacy of the electric power meter of being made up of electronic mutual inductor be not measured as yet supervision department and electric power enterprise, power consumer approval still must be used conventional electromagnetic current transducer in the electric power meter of acquire full legal force.
Summary of the invention
In order to give full play to the advantage of electromagnetic current transducer and electronic current mutual inductor; Solve electronic current mutual inductor as the problem of measurement instrument in existence aspect the management of electric power meter and the specification requirement; The utility model provides a kind of electromagnetism, electronics hybrid optoelectronic current transformer; With conventional electromagnetic type iron core secondary coil; Rogowsky coil or low-power iron-core coil are fixed in the metallic shield, and the primary conductive bar passes the center of metallic shield, and the cable of conventional electromagnetic type iron core secondary coil through passing the secondary conduit is connected with binding post on being arranged at base; Rogowsky coil or low-power iron-core coil are connected with the shielded signal wire of passing the secondary conduit, between the high voltage end of current transformer and low-voltage end, are filled with dielectric.
The utility model is given full play to the advantage of electromagnetic current transducer and electronic current mutual inductor, the metering legitimacy that has solved at present the electric power meter of forming with the electronic mutual inductor of digital quantity output and the full digital electric energy meter problem that supervision department and electric power enterprise, power consumer are approved that is not measured as yet.
Description of drawings
Fig. 1 is electromagnetism, the electronics hybrid optoelectronic current transformer structural representation of the utility model embodiment 1.
Fig. 2 is electromagnetism, the electronics hybrid optoelectronic current transformer structural representation of the utility model embodiment 2.
Embodiment
Specify a kind of electromagnetism, the electronics hybrid optoelectronic current transformer of the utility model below in conjunction with accompanying drawing.
Embodiment 1
As shown in Figure 1; A kind of electromagnetism of the utility model, electronics hybrid optoelectronic current transformer; With conventional electromagnetic type iron core secondary coil 1; Rogowsky coil 2 is fixed in the metallic shield 5, and primary conductive bar 4 passes the center of metallic shield 5, and the cable 8 of conventional electromagnetic type iron core secondary coil 1 through passing secondary conduit 6 is connected with binding post 11 on being arranged at base 10; Rogowsky coil 2 is connected with the shielded signal wire of passing secondary conduit 67, between the high voltage end of current transformer and low-voltage end, is filled with dielectric 9.
Dielectric 9 can be SF
6Gas or transformer oil.
The electric current of conventional electromagnetic type iron core secondary coil 1 output and the proportional relation of current value of primary winding are output as the current value of 1A, 2A, 5A or other numerical value.
Cable 8 can adopt shielded type cable, thereby has avoided measuring phase mutual interference between voltage signal and the current signal of coil output.
The electromagnetism of the utility model, electronics hybrid optoelectronic current transformer can also be provided with signal gathering unit 12 by base 10, and the shielded signal wire 7 of Rogowsky coil 2 through passing secondary conduit 6 is connected with signal gathering unit 12 on being arranged at base 10.Signal gathering unit 12 can convert the voltage analog signal of Rogowsky coil 2 outputs into voltage digital signal.
Embodiment 2
As shown in Figure 2; A kind of electromagnetism of the utility model, electronics hybrid optoelectronic current transformer; With conventional electromagnetic type iron core secondary coil 1; Low-power iron-core coil 3 is fixed in the metallic shield 5, and primary conductive bar 4 passes the center of metallic shield 5, and the cable 8 of conventional electromagnetic type iron core secondary coil 1 through passing secondary conduit 6 is connected with binding post 11 on being arranged at base 10; Low-power iron-core coil 3 is connected with the shielded signal wire of passing secondary conduit 67, between the high voltage end of current transformer and low-voltage end, is filled with dielectric 9.
Dielectric 9 can be SF
6Gas or transformer oil.
The electric current of conventional electromagnetic type iron core secondary coil 1 output and the proportional relation of current value of primary winding are output as the current value of 1A, 2A, 5A or other numerical value.
Cable 8 can adopt shielded type cable, thereby has avoided measuring phase mutual interference between voltage signal and the current signal of coil output.
The electromagnetism of the utility model, electronics hybrid optoelectronic current transformer can also be provided with signal gathering unit 12 by base 10, and the shielded signal wire 7 of low-power iron-core coil 3 through passing secondary conduit 6 is connected with signal gathering unit 12 on being arranged at base 10.Signal gathering unit 12 can convert the voltage analog signal of low-power iron-core coil 3 outputs into voltage digital signal.
Claims (4)
1. an electromagnetism, electronics hybrid optoelectronic current transformer; It is characterized in that; With conventional electromagnetic type iron core secondary coil; Rogowsky coil or low-power iron-core coil are fixed in the metallic shield, and the primary conductive bar passes the center of metallic shield, and the cable of conventional electromagnetic type iron core secondary coil through passing the secondary conduit is connected with binding post on being arranged at base; Rogowsky coil or low-power iron-core coil are connected with the shielded signal wire of passing the secondary conduit, between the high voltage end of current transformer and low-voltage end, are filled with dielectric.
2. a kind of electromagnetism as claimed in claim 1, electronics hybrid optoelectronic current transformer is characterized in that described dielectric is SF
6Gas or transformer oil.
3. a kind of electromagnetism as claimed in claim 1, electronics hybrid optoelectronic current transformer is characterized in that described cable is a shielded type cable.
4. like described any one electromagnetism of claim 1 to 3, electronics hybrid optoelectronic current transformer; It is characterized in that; Also comprise the signal gathering unit that is arranged on the base, Rogowsky coil or the low-power iron-core coil shielded signal wire through passing the secondary conduit is connected with signal gathering unit on being arranged at base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120309633 CN202189673U (en) | 2011-08-24 | 2011-08-24 | Electromagnetism-electron mixing current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120309633 CN202189673U (en) | 2011-08-24 | 2011-08-24 | Electromagnetism-electron mixing current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202189673U true CN202189673U (en) | 2012-04-11 |
Family
ID=45921109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120309633 Expired - Lifetime CN202189673U (en) | 2011-08-24 | 2011-08-24 | Electromagnetism-electron mixing current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202189673U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360886A (en) * | 2011-08-24 | 2012-02-22 | 云南电力试验研究院(集团)有限公司 | Electromagnetic and electronic hybrid current transformer |
| CN111936869A (en) * | 2018-04-06 | 2020-11-13 | 伊顿智能动力有限公司 | Rogowski coil with low permeability core |
-
2011
- 2011-08-24 CN CN 201120309633 patent/CN202189673U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360886A (en) * | 2011-08-24 | 2012-02-22 | 云南电力试验研究院(集团)有限公司 | Electromagnetic and electronic hybrid current transformer |
| CN111936869A (en) * | 2018-04-06 | 2020-11-13 | 伊顿智能动力有限公司 | Rogowski coil with low permeability core |
| CN111936869B (en) * | 2018-04-06 | 2024-02-23 | 伊顿智能动力有限公司 | Rogowski coil with low permeability core |
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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: 20120411 |
|
| CX01 | Expiry of patent term |