CN205384308U - Looped netowrk is electronic type voltage sensor for cabinet - Google Patents
Looped netowrk is electronic type voltage sensor for cabinet Download PDFInfo
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- CN205384308U CN205384308U CN201520804612.6U CN201520804612U CN205384308U CN 205384308 U CN205384308 U CN 205384308U CN 201520804612 U CN201520804612 U CN 201520804612U CN 205384308 U CN205384308 U CN 205384308U
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- mutual inductance
- signal transmission
- inductance signal
- tension resistive
- main unit
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Abstract
The utility model discloses a looped netowrk is electronic type voltage sensor for cabinet, including the casing with fix the resistance voltage divider in the casing, resistance voltage divider still includes the high -pressure resistance that connects gradually, sampling resistor and exchangeable signal transmission subassembly, high pressure resistance is equipped with the lead wire of being connected with the external world respectively with exchangeable signal transmission subassembly. The utility model provides an electronic type voltage sensor of dedicated small, the high accuracy of looped netowrk cabinet. Magnetism saturation phenomenon has been eliminated to this kind of electronic type sensor, and is fast to the power system fault response, has eliminated ferroresonance, and the interference killing feature is strong.
Description
Technical field
This utility model belongs to electrical network power supply looped network cabinet technical field, especially relates to a kind of ring main unit electronic voltage transducer.
Background technology
Along with technology and expanding economy, society's electricity consumption the most constantly continues to increase, and society is more and more higher to the requirement of the matter scape of power supply, persistence and reliability, it is ensured that run reliably with improving power grid security, is the important topic that must be concerned about of power supply enterprise；In order to solve this kind of outstanding problem, improving constantly the reliable concordance of power supply, power supply enterprise constantly takes to improve method and the measure of power supply reliability, provides powerful guarantee for accelerating entire society's economic construction development.
Along with the development of urban power distribution network, the mode of ring network power supply is more and more to be used in urban power distribution network, and therefore as the capital equipment ring main unit of ring network power supply, the department that is increasingly powered widely uses.Whole ring main unit industry also will welcome the great development of industry.And electronic sensor has unrivaled advantage at solution ring main unit miniaturization.With conventional electromagnetic transformer because volume is excessive, and containing cored, it is easy to cause ferromagnetic resonance, second short circuit to have big electric current, transformer can be burnt.
Utility model content
In order to make up above-mentioned ring main unit defect, the utility model proposes a kind of ring main unit cabinet electronic voltage transducer.
Its technical scheme is, a kind of ring main unit electronic voltage transducer, including housing and the resitstance voltage divider being fixed in housing, described resitstance voltage divider also includes the high-tension resistive being sequentially connected with, sample resistance and mutual inductance signal transmission assembly, described high-tension resistive is respectively equipped with, with mutual inductance signal transmission assembly, the lead-in wire being connected with the external world.
Described mutual inductance signal transmission assembly includes shielding shell, is fixed on the mutual inductance signal line in shielding shell and the copper cash screen layer being arranged between mutual inductance signal line and shell.
Described housing includes base and the top cover being arranged on base, high-tension resistive, sample resistance and mutual inductance signal transmission assembly and is fixed in base, and the lead-in wire of high-tension resistive is in communication with the outside through top cover.
Being additionally provided with wiring cap on top cover, wiring cap connects together with the lead-in wire of high-tension resistive.
For the defect of above-mentioned conventional voltage transformer, this utility model provides the volume electronic voltage transducer little, high-precision that a kind of ring main unit is special.This electronic sensor eliminates magnetic saturation phenomenon, and electric power system fault response is fast, eliminates ferromagnetic resonance, and capacity of resisting disturbance is strong.In traditional voltage transformer, electromagnetic potential transformer, in perception, can produce ferromagnetic resonance with chopper capacitive port；In addition, capacitance type potential transformer itself is containing capacity cell and multiple nonlinear inductance element (such as speed saturable reactor, compensation reactor and intermediate transformer etc.), at primary side closing operation or primary side short circuit and secondary circuit short-circuit and when eliminating fault etc., himself will produce transient process, this process is likely to excite stable subharmonic resonance, thus causing that compensation reactor and intermediate transformer winding puncture.And electronic sensor does not constitute the condition of EMR electromagnetic resonance, its electromagnetism interference is strong.
Accompanying drawing explanation
Fig. 1 is the STRUCTURE DECOMPOSITION schematic diagram of a kind of embodiment of the present utility model；
Fig. 2 is the structural representation of a kind of embodiment of mutual inductance signal transmission assembly of the present utility model.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention will be further described.
Detailed description of the invention as shown in figure 1 and 2.A kind of ring main unit electronic voltage transducer, including housing 1 and the resitstance voltage divider 2 being fixed in housing, described resitstance voltage divider also includes the high-tension resistive 3 being sequentially connected with, sample resistance and mutual inductance signal transmission assembly 4, described high-tension resistive is respectively equipped with, with mutual inductance signal transmission assembly, the lead-in wire being connected with the external world.In the present embodiment, described mutual inductance signal transmission assembly includes shielding shell 41, is fixed on the mutual inductance signal line 42 in shielding shell and the copper cash screen layer 43 being arranged between mutual inductance signal line and shell.Described housing includes base 11 and the top cover 12 being arranged on base, high-tension resistive, sample resistance and mutual inductance signal transmission assembly are fixed in base, and the lead-in wire of high-tension resistive is in communication with the outside through top cover.Being additionally provided with wiring cap 13 on top cover, wiring cap connects together with the lead-in wire of high-tension resistive.
Such sensor does not resonate and hysteresis, has good dynamic property, and linear measurement can reach maximum voltage, therefore can realize high protective value and realize comprehensively disturbing analysis.The rated value transmitted is extremely low, during the maximum voltage of primary circuit outlet, damages without to secondary device and personnel.Power attenuation is little, so can service life of extension device, actual motion more can highlight its superiority.This sensor material therefor is little, and power consumption is negligible, for environment-friendly products.
In the present embodiment, it is firm to be welded with M12 inserts high temperature resistant wire by resitstance voltage divider high-pressure side, is fixed on by resitstance voltage divider in high temperature resistant ABS shell, pours into a mould with epoxy resin.Resitstance voltage divider structure is as follows: high-tension resistive, sample resistance and shielding line three part composition.High-tension resistive is chosen: 50M Ω；Sample resistance is chosen: 30k Ω；Rated voltage: 10kV/ √ 3；Then calculating secondary output voltage is 3.464V；If desired secondary output voltage is 0.75V, it is necessary to sample resistance total value is: 6.495k Ω；Therefore parallel connection potentiometer 10k Ω, its total resistance can be made to be adjusted to 6.495k Ω, can make secondary output valve is 0.75V.Highvoltage resistance potential divider (10kV system).
Transducer signal transmission line adopts double shielded twisted pair line, in order to be formed without circulation, affect transformer laser propagation effect, employing shields mode single-end earthed, product after implementing, not only volume is little, and weight is also light, this is one and has comprehensive function, energy-saving product, improves competitiveness commercially.
In sum, not whole intensions of the present utility model: hereafter, all have within by utility model subject spirit to make any amendment, replacement until improving the projects such as upgrading, be included within protection domain of the present utility model.
Claims (4)
1. a ring main unit electronic voltage transducer, including housing (1) and the resitstance voltage divider (2) that is fixed in housing, it is characterized in that, described resitstance voltage divider also includes the high-tension resistive (3) being sequentially connected with, sample resistance and mutual inductance signal transmission assembly (4), described high-tension resistive is respectively equipped with, with mutual inductance signal transmission assembly, the lead-in wire being connected with the external world.
2. ring main unit electronic voltage transducer according to claim 1, it is characterized in that, described mutual inductance signal transmission assembly includes shielding shell (41), is fixed on the mutual inductance signal line (42) in shielding shell and the copper cash screen layer (43) being arranged between mutual inductance signal line and shell.
3. ring main unit electronic voltage transducer according to claim 1, it is characterized in that, described housing includes base (11) and the top cover (12) being arranged on base, high-tension resistive, sample resistance and mutual inductance signal transmission assembly are fixed in base, and the lead-in wire of high-tension resistive is in communication with the outside through top cover.
4. ring main unit electronic voltage transducer according to claim 3, it is characterised in that being additionally provided with wiring cap (13) on top cover, wiring cap connects together with the lead-in wire of high-tension resistive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520804612.6U CN205384308U (en) | 2015-10-16 | 2015-10-16 | Looped netowrk is electronic type voltage sensor for cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520804612.6U CN205384308U (en) | 2015-10-16 | 2015-10-16 | Looped netowrk is electronic type voltage sensor for cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205384308U true CN205384308U (en) | 2016-07-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520804612.6U Active CN205384308U (en) | 2015-10-16 | 2015-10-16 | Looped netowrk is electronic type voltage sensor for cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205384308U (en) |
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2015
- 2015-10-16 CN CN201520804612.6U patent/CN205384308U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |