CN201397740Y - Hollow mutual inductor for high-voltage switch - Google Patents
Hollow mutual inductor for high-voltage switch Download PDFInfo
- Publication number
- CN201397740Y CN201397740Y CN2008201542996U CN200820154299U CN201397740Y CN 201397740 Y CN201397740 Y CN 201397740Y CN 2008201542996 U CN2008201542996 U CN 2008201542996U CN 200820154299 U CN200820154299 U CN 200820154299U CN 201397740 Y CN201397740 Y CN 201397740Y
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- China
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- induction coil
- hollow
- sampling circuit
- mutual inductor
- voltage switch
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Abstract
The utility model relates to a hollow mutual inductor for a high-voltage switch, which consists of an induction coil, a hollow framework and a sampling circuit, wherein the induction coil winds roundthe hollow framework; the sampling circuit is internally provided with a signal input end and a grounding terminal; the periphery of the induction coil is covered by copper foil shielding layers; theoutput end of the induction coil is connected with a twisted-pair shielding wire; the copper foil shielding layers are connected with the grounding terminal of the sampling circuit by a leading wire;a signal wire of the twisted-pair shielding wire is connected with the signal input end of the sampling circuit; and a shielding layer of the twisted-pair shielding wire is connected with the grounding terminal of the sampling circuit. In the utility model, the periphery of the induction hollow coil in the hollow mutual inductor is provided with the shielding layer, the twisted-pair shielding wireis utilized to output signal and all the shielding layers are connected with the grounding wire of the sampling circuit, which can effectively eliminate the differential mode interference brought byhigh voltage and ensure the stable output of the signal sampling circuit, thereby causing the running of the high-voltage switch to be stable.
Description
Technical field:
The utility model relates to electricity field, relates in particular to mining magnetic starter, particularly mining magnetic starter switch, and concrete is a kind of hollow mutual inductor that is used for high-voltage switch gear.
Background technology:
In the prior art, the electronic type hollow coil current transformers that adopt in the mining magnetic starter more, wherein do not contain iron core, overcome that core type current transformer volume is big, the shortcoming of magnetic saturation and ferro resonance, the electronic type hollow coil current transformer uses more in mining low tension switch, but basic not use in the mining high-voltage switch of 6KV, 10KV.Reason be since hollow mutual inductor output be the voltage signal of mV level, in high voltage flame proof switch, very easily be subjected to the interference of high pressure, on transmission line, cause serious differential mode interference, cause the disorder of output signal, directly influence the performance of protective device.
Summary of the invention:
The purpose of this utility model is to provide a kind of hollow mutual inductor that is used for high-voltage switch gear, and the described this hollow mutual inductor that is used for high-voltage switch gear will solve prior art mesohigh signal the output signal of hollow mutual inductor is caused interference, influences the technical problem of protective device job stability.
This hollow mutual inductor of high-voltage switch gear that is used for of the present utility model is by induction coil, hollow skeleton and sample circuit constitute, described induction coil is wound on the described hollow skeleton, be provided with signal input part and earth terminal in the described sample circuit, wherein, the periphery of described induction coil is coated with a Copper Foil screen, the output of induction coil is connected with the multiple twin shielding conductor, described Copper Foil screen is connected with the earth terminal of described sample circuit by a lead, holding wire in the described multiple twin shielding conductor is connected with the signal input part of sample circuit, and the screen in the multiple twin shielding conductor is connected with the earth terminal of sample circuit.
Further, the line of described induction coil directly is 0.14mm, and the number of turn is 2700 circles.
Further, described induction coil is an air core solenoid.
Concrete, induction coil described in the utility model, hollow skeleton, sample circuit, Copper Foil screen and multiple twin shielding conductor all adopt known schemes of the prior art, about induction coil, hollow skeleton, sample circuit, Copper Foil screen and multiple twin shielding conductor known schemes in the prior art, those skilled in the art all understands, does not repeat them here.
Operation principle of the present utility model is: the screen that induction coil is outer and the screen of multiple twin shielding conductor all are connected with the earth terminal of sample circuit, can effectively eliminate the differential mode interference that high pressure causes when therefore the amplifier in sample circuit amplifies output signal on signal transmssion line.
The utility model is compared with prior art, and its effect is actively with tangible.The induction air core coil periphery of the utility model in hollow mutual inductor is provided with screen, utilize multiple twin shielding conductor output signal, screen all links to each other with the earth terminal of sample circuit, can effectively eliminate the differential mode interference that high pressure brings, the output that guarantees signal sample circuit is stable, thereby makes the high-voltage switch gear working stability.
Description of drawings:
Fig. 1 is the schematic diagram of an embodiment of the hollow mutual inductor that is used for high-voltage switch gear of the present utility model.
Embodiment:
Embodiment 1:
As shown in Figure 1, the hollow mutual inductor of high-voltage switch gear that is used for of the present utility model is by induction coil 1, hollow skeleton and sample circuit 2 constitute, described induction coil 1 is wound on the described hollow skeleton, be provided with signal input part and earth terminal in the described sample circuit 2, wherein, the periphery of described induction coil 1 is coated with a Copper Foil screen 11, the output of induction coil 1 is connected with multiple twin shielding conductor 12, described Copper Foil screen 11 is connected with the earth terminal of described sample circuit 2 by a lead, holding wire in the described multiple twin shielding conductor 12 is connected with the signal input part of sample circuit 2, and the screen 13 in the multiple twin shielding conductor 12 is connected with the earth terminal of sample circuit 2.
Further, the line of described induction coil 1 directly is 0.14mm, and the number of turn is 2700 circles.
Further, described induction coil 1 is an air core solenoid.Adopt the Rogowski induction coil in the present embodiment.
Concrete, tested electric current 3 is perpendicular to induction coil 1 plane and be positioned at the center of induction coil 1.
If n is the number of turn on induction coil 1 unit length, S is induction coil 1 sectional area, and then the magnetic linkage on 1 section of the induction coil is:
dφ＝u
0SnH·dl
In the formula: H is the magnetic field intensity at induction coil 1dl section place.
The magnetic linkage of whole induction coil 1 is:
φ＝∫u
0SnH·dl
If the n and the S at induction coil 1 place are even,, have according to circuital law
φ＝∫u
0SnH·dl＝u
0Sn∫H·dl＝u
0Sni
If i is an alternating current, then the induced electromotive force of induction coil 1 is:
By following formula as can be known the induced electromotive force e (t) of Rogowski induction coil 1 be directly proportional with the differential of tested electric current 3, utilize integrated circuit 21 pairs of outputs carrying out integral transformation just can try to achieve tested electric current 3.
Claims (3)
1. hollow mutual inductor that is used for high-voltage switch gear, by induction coil, hollow skeleton and sample circuit constitute, described induction coil is wound on the described hollow skeleton, be provided with signal input part and earth terminal in the described sample circuit, it is characterized in that: the periphery of described induction coil is coated with a Copper Foil screen, the output of induction coil is connected with the multiple twin shielding conductor, described Copper Foil screen is connected with the earth terminal of described sample circuit by a lead, holding wire in the described multiple twin shielding conductor is connected with the signal input part of sample circuit, and the screen in the multiple twin shielding conductor is connected with the earth terminal of sample circuit.
2. the hollow mutual inductor that is used for high-voltage switch gear as claimed in claim 1 is characterized in that: the line of described induction coil directly is 0.14mm, and the number of turn is 2700 circles.
3. the hollow mutual inductor that is used for high-voltage switch gear as claimed in claim 1 is characterized in that: described induction coil is an air core solenoid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008201542996U CN201397740Y (en) | 2008-10-21 | 2008-10-21 | Hollow mutual inductor for high-voltage switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008201542996U CN201397740Y (en) | 2008-10-21 | 2008-10-21 | Hollow mutual inductor for high-voltage switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201397740Y true CN201397740Y (en) | 2010-02-03 |
Family
ID=41620267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008201542996U Expired - Fee Related CN201397740Y (en) | 2008-10-21 | 2008-10-21 | Hollow mutual inductor for high-voltage switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201397740Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10107720B2 (en) | 2009-08-13 | 2018-10-23 | Alere Switzerland Gmbh | Detection device and method of using the same |
-
2008
- 2008-10-21 CN CN2008201542996U patent/CN201397740Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10107720B2 (en) | 2009-08-13 | 2018-10-23 | Alere Switzerland Gmbh | Detection device and method of using the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100203 Termination date: 20171021 |