CN202770922U - Reliably shielded voltage-division type high-voltage measurement device - Google Patents
Reliably shielded voltage-division type high-voltage measurement device Download PDFInfo
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- CN202770922U CN202770922U CN 201220355014 CN201220355014U CN202770922U CN 202770922 U CN202770922 U CN 202770922U CN 201220355014 CN201220355014 CN 201220355014 CN 201220355014 U CN201220355014 U CN 201220355014U CN 202770922 U CN202770922 U CN 202770922U
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Abstract
The utility model relates to a reliably shielded voltage-division type high-voltage measurement device, which is characterized by comprising a display screen (3), a measurement junction terminal (5), a grounding terminal (9) and a metering module (10); a high-voltage arm (6) and a low-voltage arm (7) are connected between the measurement junction terminal (5) and the grounding terminal (9) in series; and leads at two ends of the low-voltage arm (7) are connected with the metering module (10) in the device through shielded coaxial cables (8). Because of adopting the multi-layer shielding technology, the accuracy degree of a measurement result is high; the linearity is good; after testing, the integrated accuracy degree is higher than that of like products; and the service life is increased to 5-10 years from 3-5 years of the like products.
Description
Technical field
The utility model relates to the power measurement device, is a kind of partial pressure type high-pressure measurement mechanism of reliable shielding specifically.
Background technology
The electrification in high voltage of electric system is measured operation at high pressure 200KV and when above, although testing crew is worn insulated shoes and is in safe distance with exterior domain, but because the impact that high-voltage electric field distributes, can make on the human body in electric field region with different induced potentials, line of electric force is measured in this case operates, measurement result inevitably is subject to the impact of human body sensing electromotive force, makes survey measurements lose accuracy.In order to realize the precision measurement to the alternating current-direct current high-tension line, common alterating and direct current depressor generally is design layer of metal shielding harness.But, be inadequate from this individual layer of on-site actual situations or two-layer shielding for the electric field influence that reduces measuring system.In order to realize high-precision in-site measurement, measurement mechanism need to be made the higher improvement of stability.
Summary of the invention
Technical problem to be solved in the utility model is the deficiency that solves existing above-mentioned measurement mechanism, and a kind of partial pressure type high-pressure measurement mechanism of reliable shielding is provided, so that the live line measurement operation result of electric system is more stable, reliable.
The partial pressure type high-pressure measurement mechanism of described reliable shielding, it is characterized in that: comprise display screen, measure terminals, earth terminal, metering module, between described measurement terminals and earth terminal, be connected in series high-voltage arm and low-voltage arm, be connected with metering module in installing by the coaxial cable of band shielding at the lead-in wire at low-voltage arm two ends.
Described high-voltage arm is surrounded by the high frequency magnetic field shield outward.
Described low-voltage arm is surrounded by the low frequency magnetic field shield outward.
Described high frequency magnetic field shield is connected with earth terminal with the earth.
Described low frequency magnetic field shield is connected with earth terminal with the earth.
Described coaxial cable is with screen layer, and screen layer is connected with earth terminal with the earth.
Shielding is exactly to metal level the conductively-closed object being carried out omnibearing isolation, with induction and the radiation to the conductively-closed object of control electric field, magnetic field and electromagnetic wave.Specifically, be surrounded with the interference source of shield with component, circuit, subassembly, cable or whole system exactly, prevent that interfere with electromagnetic field is to external diffusion; With shield receiving circuit, equipment or system are surrounded, prevent that they are subject to the impact of external electromagnetic field.Because shield absorbs energy (eddy current loss), reflected energy (boundary reflection of electromagnetic wave on shield) and offset energy to all playing from the interference electromagnetic wave of the outsides such as wire, cable, component, circuit or system and internal electrical magnetic wave that (electromagnetic induction is at the reverse electromagnetic field of screen layer generation, can offset part and disturb electromagnetic wave) effect, so shield has the function that weakens interference.
Alternating current-direct current high pressure partial pressure measuring apparatus described in the utility model has utilized the capacitance-resistance equal potential screening technique, is mainly used in the precision measurement of 30-300Hz ac high-voltage and high direct voltage.It is the ideal equipment that replaces high voltage electrostatic voltmeter.
Alternating current-direct current high pressure partial pressure measuring apparatus described in the utility model has easy and simple to handle, and the AC and DC accuracy class is high, the little lightweight characteristics of volume.Because adopt the multilayer screen technology, the measurement result accuracy is high, the linearity good, overall accuracy is all high than like product after tested.Serviceable life, the 3-5 by like product brought up to 5-10.
Description of drawings
Fig. 1 is the utility model in-site measurement view,
Fig. 2 is the utility model shield EMC measurement circuit theory schematic diagram.
Among the figure: 1-epoxy tube, 2-partial pressure measuring apparatus, 3-display screen, 4-switch, 5-measurement terminals, 6-high-voltage arm, 7-low-voltage arm, 8-coaxial cable, 9-earth terminal, 10-metering module, 11-high frequency magnetic field shield, 12-low frequency magnetic field shield.
Embodiment
The present invention is further described below in conjunction with accompanying drawing: the partial pressure type high-pressure measurement mechanism of reliable shielding as described in as shown in Fig. 1,2, it is characterized in that: comprise display screen 3, measure terminals 5, earth terminal 9, metering module 10, between described measurement terminals 5 and earth terminal 9, be connected in series high-voltage arm 6 and low-voltage arm 7, be connected with metering module 10 in installing by the coaxial cable 8 of band shielding at the lead-in wire at low-voltage arm 7 two ends.
The described high-voltage arm 6 outer high frequency magnetic field shields 11 that are surrounded by.The described low-voltage arm 7 outer low frequency magnetic field shields 12 that are surrounded by.
The alternating magnetic field shielding has dividing of high and low frequency.The low frequency magnetic field shielding is to utilize the material of high magnetic permeability to consist of low magnetic resistance path, and most of magnetic field is concentrated in the shield.The shielding of high frequency magnetic field utilizes the reversed magnetic field of eddy current of the material production of high conductivity to offset disturbing magnetic field and realizes.That is to say, when the frequency of interfere with electromagnetic field is higher, utilize the eddy current that produces in the metal material of low-resistivity, form and externally come electromagnetic negative function, thereby reach the effect of shielding.When disturbing electromagnetic frequency low, adopt the material of high permeability, thereby make the magnetic line of force be limited in shield inside, prevent that the space that is diffused into shielding from going.
What the utility model adopted is that high frequency is mixed the metallic shield body that uses with low frequency.Combine both advantages.
Described high frequency magnetic field shield 11 is connected with earth terminal with the earth and is connected.Described low frequency magnetic field shield 12 is connected with earth terminal with the earth and is connected.Described coaxial cable 8 is with screen layer, and screen layer is connected with earth terminal with the earth and is connected.
Conductively-closed body for high direct voltage, with complete metallic shield body the positively charged conductor surrounded is got up, to induce the negative charge with energized conductor equivalent in the inboard of shield, positive charge with energized conductor equivalent appears in the outside, we are with metallic shield body ground connection, then the positive charge in the outside will flow into the earth, and the outside will not have electric field and exist, and namely the electric field of positively charged conductor is shielded in the metallic shield body.The conductively-closed body of ac high-voltage also is the same reason.
High-voltage arm 6 parts of partial pressure type high-pressure measurement mechanism described in the utility model adopt high-stability high voltage electric capacity and high-tension resistive as the high-tension measurement arm, low-voltage arm 7 is placed in the container of an all-metal shielding, high and low pressure arm is through after the special-purpose bridge calibration, be placed in the same large container, filled silicon rubber in container again, place shading ring, after insulation processing is finished, with the shelf depreciation instrument insulating property are done examination again, thereby improve greatly accuracy of measurement, the linearity is better, and serviceable life, the 3-5 by like product brought up to 5-10.
Claims (6)
1. the partial pressure type high-pressure measurement mechanism of a reliable shielding, it is characterized in that: comprise display screen (3), measure terminals (5), earth terminal (9), metering module (10), between described measurement terminals (5) and earth terminal (9), be connected in series high-voltage arm (6) and low-voltage arm (7), be connected with metering module (10) in installing by the coaxial cable (8) of band shielding at the lead-in wire at low-voltage arm (7) two ends.
2. the partial pressure type high-pressure measurement mechanism of a kind of reliable shielding according to claim 1 is characterized in that: the outer high frequency magnetic field shield (11) that is surrounded by of described high-voltage arm (6).
3. the partial pressure type high-pressure measurement mechanism of a kind of reliable shielding according to claim 1 is characterized in that: the outer low frequency magnetic field shield (12) that is surrounded by of described low-voltage arm (7).
4. the partial pressure type high-pressure measurement mechanism of a kind of reliable shielding according to claim 2, it is characterized in that: described high frequency magnetic field shield (11) is connected 9 with the earth with earth terminal) be connected.
5. the partial pressure type high-pressure measurement mechanism of a kind of reliable shielding according to claim 3, it is characterized in that: described low frequency magnetic field shield (12) is connected 9 with the earth with earth terminal) be connected.
6. the partial pressure type high-pressure measurement mechanism of a kind of reliable shielding according to claim 1, it is characterized in that: described coaxial cable (8) is with screen layer, and screen layer is connected 9 with the earth with earth terminal) be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220355014 CN202770922U (en) | 2012-07-20 | 2012-07-20 | Reliably shielded voltage-division type high-voltage measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220355014 CN202770922U (en) | 2012-07-20 | 2012-07-20 | Reliably shielded voltage-division type high-voltage measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202770922U true CN202770922U (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220355014 Expired - Lifetime CN202770922U (en) | 2012-07-20 | 2012-07-20 | Reliably shielded voltage-division type high-voltage measurement device |
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| CN (1) | CN202770922U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360134A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Live-line voltage measurement device capable of preventing transient overvoltage |
| CN104360160A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | High-voltage loop contact resistor live line measurement device |
| CN104360132A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Contact resistance live line measurement device |
| CN107394428A (en) * | 2017-07-31 | 2017-11-24 | 武汉大学 | A kind of shield type direct current grounding pole and the co-located earthed system of current conversion station grounded screen |
| CN109782195A (en) * | 2019-02-23 | 2019-05-21 | 中国原子能科学研究院 | A kind of induction coil magnetic field measurement system of anti-noise jamming |
| TWI745478B (en) * | 2016-11-11 | 2021-11-11 | 美商富克有限公司 | Sensor subsystems for non-contact voltage measurement devices |
-
2012
- 2012-07-20 CN CN 201220355014 patent/CN202770922U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360134A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Live-line voltage measurement device capable of preventing transient overvoltage |
| CN104360160A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | High-voltage loop contact resistor live line measurement device |
| CN104360132A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Contact resistance live line measurement device |
| TWI745478B (en) * | 2016-11-11 | 2021-11-11 | 美商富克有限公司 | Sensor subsystems for non-contact voltage measurement devices |
| CN107394428A (en) * | 2017-07-31 | 2017-11-24 | 武汉大学 | A kind of shield type direct current grounding pole and the co-located earthed system of current conversion station grounded screen |
| CN107394428B (en) * | 2017-07-31 | 2023-04-07 | 武汉大学 | Grounding system for co-location of shielding type direct current grounding electrode and converter station grounding grid |
| CN109782195A (en) * | 2019-02-23 | 2019-05-21 | 中国原子能科学研究院 | A kind of induction coil magnetic field measurement system of anti-noise jamming |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430073, Wuhan, Hubei hi tech Development Zone, East Lake, 62 Optics Valley Avenue, Optics Valley headquarters, 4 East, 8 floor Patentee after: Wuhan nanluo Electric Co.,Ltd. Address before: 430073, Wuhan, Hubei hi tech Development Zone, East Lake, 62 Optics Valley Avenue, Optics Valley headquarters, 4 East, 8 floor Patentee before: WUHAN NANRUI ELECTRIC Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130306 |