CN2043760U - Portable h.v.measurer - Google Patents
Portable h.v.measurer Download PDFInfo
- Publication number
- CN2043760U CN2043760U CN 88217788 CN88217788U CN2043760U CN 2043760 U CN2043760 U CN 2043760U CN 88217788 CN88217788 CN 88217788 CN 88217788 U CN88217788 U CN 88217788U CN 2043760 U CN2043760 U CN 2043760U
- Authority
- CN
- China
- Prior art keywords
- voltage divider
- resistance
- voltage
- digital voltmeter
- divider
- Prior art date
- 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
Links
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model relates to an alternating-current and direct-current portable high voltage measurer, which is primarily composed of a bleeder, a base, an alternating-current and direct-current digital voltmeter, etc. The utility model is characterized in that the bleeder comprises a main bleeder and an assistant bleeder for grading screen; the bleeder and the alternating-current and direct-current digital voltmeter are integrated via the base; the utility model has the characteristics of high measurement precision, easy carrying and use, safe operation, digit display, etc. The distinguishability of the instrument is 0.1kv, direct-current high voltage measuring accuracy is 0.5 % and alternate-current high voltage measuring accuracy is 1 %.
Description
The utility model is to belong to voltage measuring apparatus, particularly a kind of portable high voltage measuring instrument of suitable AC/DC.
Present high voltage test instrument general mainly is made of a voltage divider and indicating instrument such as voltage table.When test, voltage divider and voltage table are linked up use with cable, this give carry and use all bring not too convenient, its voltage divider is single, lack electric shield, having plenty of resistance is in series, can only carry out high direct voltage measures, what have is formed by capacitances in series, can only be used for ac high voltage measures, have by resistance, capacitances in series forms, though can measure the alternating current-direct current high voltage, absorbed power is big, and be difficult to reach high precision, cost an arm and a leg, topmost shortcoming is because electric shield is perfect inadequately, so under interchange or high direct voltage, exist stray capacitance and spuious bleeder resistance inevitably, make voltage divider outside surface voltage skewness and influence measuring accuracy.In order under stray capacitance and the influence of spuious bleeder resistance, to obtain measurement effect preferably, usually require the electric current of voltage divider resistance or electric capacity can not be less than 0.5 milliampere, be generally 1 milliampere, this has just increased the power consumption when measuring, and this big electric current heats up to resistance heated, influenced measuring stability.
The purpose of this utility model is to avoid the stray capacitance of voltage divider and the influence of spuious bleeder resistance as far as possible, a kind of enough measuring accuracy that has are provided, and handling safety is easy to carry, the high voltage measuring instrument of AC/DC easy to use
High voltage measuring instrument of the present utility model, mainly by high-voltage terminal, be contained in voltage divider in insulating cylinder and the cover, base, alternating current-direct current digital voltmeter etc. and partly form.It is characterized in that, said voltage divider is not single, it comprises a main voltage divider and an auxiliary-voltage divider, and N divider resistance and a sample resistance are in series main voltage divider in the main voltage divider insulation tube that is full of insulating oil by placing.Use for measuring.Outside this main voltage divider, also has an auxiliary-voltage divider that plays shielding action, it by N discrete and constitute corresponding to copper ring, a N resistance and N electric capacity that the tie point of main voltage divider resistance is attached to main voltage divider insulation outer surface of tube wall, connect respectively N tie point of N tie point of back resistance and electric capacity of resistance, electric capacity links up formation parallel connection one by one between resistance and the electric capacity with corresponding N copper ring.Main voltage divider and the high-pressure side that helps voltage divider are connected with copper sheet on the voltage divider simultaneously and place in the insulating cylinder that has been full of insulating oil again.And by spring, cover is electrically connected with high-voltage terminal.The end of main voltage divider, the tie point of promptly main voltage divider resistance and sample resistance, connect the alternating current-direct current digital voltmeter on the one hand, promptly by the A contact in the switch through AC/DC convertor, another A ' contact of switch links to each other with non-ground input end as the digital voltmeter of indicating instrument, or through the D of switch, D ' contact directly links to each other with the non-ground input end of the electric word table of numeral, on the other hand, the end of main voltage divider is through sample resistance, the copper ring of the end of auxiliary-voltage divider and base and on the ground terminal ground connection that links to each other.
Said voltage divider and alternating current-direct current digital voltmeter are dressed up one by base, and the alternating current-direct current digital voltmeter is in the inner chamber of metab, and base plays shielding action to digital voltmeter.
The divider resistance total value of said main voltage divider is selected by every volt voltage 5K Ω～20K Ω according to the full scale of instrument, and each divider resistance is N/one of total resistance.The auxiliary-voltage divider total resistance value is selected resistance by every volt voltage 5K Ω～50K Ω, and each divider resistance is its N/one, always exchanges capacitive reactance and selects electric capacity and each to divide electric capacity by every volt voltage 0.5K Ω～2K Ω.
According to the requirement of all pressing and shielding, General N should be greater than 7.Say that in principle the big more effect of all pressing of N value is good more, but corresponding processing charges increase also.The N value is decided by the precision of instrument and suitable resistance, electric capacity.
In order to reduce the influence of high-tension electricity to surveying instrument work.Shading ring is set up on the insulating cylinder top that is preferably in said voltage divider on every side.
The selection of digital voltmeter can be as the criterion with the place of safety at high-tension measurement in high-visible numeral demonstration.In general, adopt the emitting red light charactron to be shown as best.
Root is obvious, the utlity model has following advantage:
1, because main voltage divider has all pressures shielding action of auxiliary-voltage divider outward, and is within the double hyer insulation tube and is immersed in the insulating oil, thereby the influence of stray capacitance and spuious bleeder resistance is significantly reduced.The Instrument measuring precision height.Simultaneously for adopting little surveying work electric current to create condition.
2, according to the selection of main voltage divider divider resistance, can guarantee that instrument is when full scale is measured, by the electric current on the divider resistance still less than 0.2 milliampere, thereby avoided the surveying work electric current resistance heated to be caused the instability of measurement.
3, voltage divider and digital voltmeter etc. are fused by base, thereby carry with easy to use, have the high characteristics of safety and measuring accuracy.
4, owing to adopt the alternating current-direct current digital voltmeter to make indicating instrument,, can measure ac high voltage again so this instrument both can be measured dc high voltage.
Further specify the utility model below in conjunction with embodiment.
Fig. 1 is the cut-open view of the utility model embodiment.
Fig. 2 is the main voltage divider of the utility model embodiment and the partial circuit figure of digital voltmeter annexation.
1 is high-voltage terminal among the figure, it is a copper ball, it has a screw to be connected with the screw flight of the cover 2 of metal, main voltage divider is in series by 10 main voltage divider divider resistances 6 and a sample resistance 18, place the main voltage divider insulation tube 7 that is full of silicone oil 12, auxiliary-voltage divider is by 10 auxiliary-voltage divider resistance 9,10 auxiliary-voltage divider electric capacity 10 and 10 copper rings 8 constitute, said resistance, after electric capacity is connected respectively, its tie point is connected on respectively on the copper ring 8, copper ring is fixed on the outside surface of main voltage divider insulation tube 7, each copper ring is corresponding one by one with the position of the resistance tie point 5 of main voltage divider, but insulate on electric, copper ring plays uniform electric field.Resistance, electric capacity are selected by the maximum range of instrument, and each main branch device resistance 8 is 100M Ω, and auxiliary-voltage divider resistance 9 is 150M Ω, and auxiliary-voltage divider electric capacity 10 is 500Pf.The high-pressure side of main voltage divider and auxiliary-voltage divider is connected with voltage divider copper sheet 4 simultaneously, places in the insulating cylinder 11 that has been full of silicone oil 12 again, and insulating cylinder 11 is by cover 2 sealings.Voltage divider copper sheet 4 is by spring 3, cover 2 is connected with high-voltage terminal 1, the end of main voltage divider, the tie point of promptly main voltage divider resistance and sample resistance 18, on the one hand by the A contact in the switch 13 through AC/DC convertor AC/DC, another A ' contact of switch links to each other with the non-ground input end of digital voltmeter 16, or through the D of switch, D ' contact directly links to each other with the non-ground input end of digital voltmeter 16, on the other hand, the end of main voltage divider is through sample resistance 18, the terminal copper ring of auxiliary-voltage divider and base 17 and on ground terminal 15 ground connection that links to each other.Ac high-voltage voltage can be measured when switch 13 places A and A ' contact, high direct voltage voltage can be measured when switch 13 places D and D ' contact.The digital voltmeter that said digital voltmeter adopts the emitting red light charactron to show, this table and AC/DC changeover switch, promptly the alternating current-direct current digital voltmeter places the cavity of base 17.The 14th, feet, but the level of demodulating apparatus.
This embodiment is through on probation and test comparison proof, its DC voltage range is 0～100 kilovolt, and the alternating voltage range is 0～200 kilovolt, and resolution is 0.1 kilovolt, the dc voltage measurement precision is 0.5%, and the ac voltage measurement precision is 1%.
Claims (6)
1, a kind of direct current, the dual-purpose portable high-pressure measuring instrument of interchange contain high-voltage terminal 1, spring 3, are contained in voltage divider and indicating instrument in insulating cylinder 11 and the cover 2, it is characterized in that:
(1) said voltage divider is made up of a main voltage divider and an auxiliary-voltage divider, main voltage divider is in series by N divider resistance 6 and a sample resistance 18, place in the main voltage divider insulation tube 7 that is full of insulating oil 12, N discrete copper ring 8 arranged on the outside surface of this insulation tube, corresponding one by one with the tie point 5 of a main voltage divider N resistance 6, N resistance 9 that main voltage divider insulation tube is outer and N electric capacity 10 are connected afterwards by copper ring 8 respectively and are unified into auxiliary-voltage divider.Main voltage divider and auxiliary-voltage divider are placed in the insulating cylinder 11 that has been full of insulating oil 12, the high-pressure side of main voltage divider and auxiliary-voltage divider is connected with copper sheet 4 simultaneously, and be electrically connected with high-voltage terminal 1 by spring 3, cover 2
(2) said indicating instrument is a digital voltmeter 16,
(3) said voltage divider and digital voltmeter are dressed up one by base 17, and digital voltmeter is in the inner chamber of metab 17,
(4) the not end of said main voltage divider links to each other with the non-ground input end of digital voltmeter 16 through AC/DC changeover switch AC/DC, switch 13A contact by switch 13A contact on the one hand, or directly link to each other with digital voltmeter 16 non-ground input ends through D, the D contact of switch 13, on the other hand through sample resistance 18 and auxiliary-voltage divider do not hold copper ring 8 and base 17 and on ground terminal 15 ground connection.
2, according to the high voltage measuring instrument of claim 1, the divider resistance summation that it is characterized in that said main voltage divider is selected resistance 6 according to the range of this instrument by every volt voltage 5K Ω～20K Ω, the all-in resistance of auxiliary-voltage divider is selected resistance 9 by every volt voltage 5K Ω～50K Ω, always exchanges capacitive reactance and selects electric capacity 10 by every volt voltage 0.5K Ω～2K Ω.
3, according to the high voltage measuring instrument of claim 2.It is characterized in that said N 〉=7.
4, according to claim 1,2,3 high voltage measuring instrument, it is characterized in that the top of the insulating cylinder 11 of said main voltage divider also has shading ring 19 to link to each other with cover 2.
5, according to claim 1,2,3 high voltage measuring instrument, it is characterized in that the digital voltmeter that said digital voltmeter adopts the emitting red light charactron to show.
6, according to the high voltage measuring instrument of claim 4.It is characterized in that the digital voltmeter that said digital voltmeter adopts the emitting red light charactron to show.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88217788 CN2043760U (en) | 1988-12-15 | 1988-12-15 | Portable h.v.measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88217788 CN2043760U (en) | 1988-12-15 | 1988-12-15 | Portable h.v.measurer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2043760U true CN2043760U (en) | 1989-08-30 |
Family
ID=4850298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88217788 Expired - Lifetime CN2043760U (en) | 1988-12-15 | 1988-12-15 | Portable h.v.measurer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2043760U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437123C (en) * | 2002-12-20 | 2008-11-26 | Abb股份有限公司 | A method and a device for voltage measurement in a high-voltage conductor |
| CN100552458C (en) * | 2006-07-31 | 2009-10-21 | 深圳市计量质量检测研究院 | High-frequency high-pressure measurement mechanism |
| CN104459262A (en) * | 2014-12-04 | 2015-03-25 | 中国西电电气股份有限公司 | High-voltage measuring resistance voltage divider |
| CN105842508A (en) * | 2015-01-12 | 2016-08-10 | 苏州华电电气股份有限公司 | AC voltage divider |
| CN106556726A (en) * | 2015-09-29 | 2017-04-05 | 中国电力科学研究院 | A kind of standard DC voltage divider on the floating ground of low-pressure end |
| CN108710015A (en) * | 2018-07-27 | 2018-10-26 | 北京明源科技发展有限公司 | The overhead line voltage mutual inductor of collection voltages signal |
| CN111679240A (en) * | 2020-04-24 | 2020-09-18 | 国网江苏省电力有限公司营销服务中心 | Direct current voltage on-line measuring device for distributed energy efficiency calibration |
-
1988
- 1988-12-15 CN CN 88217788 patent/CN2043760U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437123C (en) * | 2002-12-20 | 2008-11-26 | Abb股份有限公司 | A method and a device for voltage measurement in a high-voltage conductor |
| CN100552458C (en) * | 2006-07-31 | 2009-10-21 | 深圳市计量质量检测研究院 | High-frequency high-pressure measurement mechanism |
| CN104459262A (en) * | 2014-12-04 | 2015-03-25 | 中国西电电气股份有限公司 | High-voltage measuring resistance voltage divider |
| CN105842508A (en) * | 2015-01-12 | 2016-08-10 | 苏州华电电气股份有限公司 | AC voltage divider |
| CN106556726A (en) * | 2015-09-29 | 2017-04-05 | 中国电力科学研究院 | A kind of standard DC voltage divider on the floating ground of low-pressure end |
| CN106556726B (en) * | 2015-09-29 | 2019-07-23 | 中国电力科学研究院 | A kind of standard DC voltage divider on the floating ground of low-pressure end |
| CN108710015A (en) * | 2018-07-27 | 2018-10-26 | 北京明源科技发展有限公司 | The overhead line voltage mutual inductor of collection voltages signal |
| CN111679240A (en) * | 2020-04-24 | 2020-09-18 | 国网江苏省电力有限公司营销服务中心 | Direct current voltage on-line measuring device for distributed energy efficiency calibration |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2007102048A (en) | METHOD AND DEVICE FOR MEASURING ELECTRICAL VOLTAGE ON A POWER OFF TURNING DEVICE | |
| CN106226564B (en) | Routine test transfer box for high-voltage capacitance type voltage transformer without disassembling lead | |
| CN2043760U (en) | Portable h.v.measurer | |
| CN87214780U (en) | High voltage meter | |
| CN208795789U (en) | A kind of multimeter judging automatically test object | |
| CN106970268A (en) | Single-phase overhead transmission line of electricity phase voltage method for self-calibrating based on shunt capacitance | |
| CN101650388B (en) | Measuring device and method of human body resistance under DC current | |
| CN1048555C (en) | L, C testing circuit and multi-parameter measurer thereof | |
| CN109974931A (en) | A kind of accurate electron vacuum gage of reverse-filling | |
| CN207780219U (en) | A kind of voltage transformer no-load loss comprehensive tester | |
| CN2289249Y (en) | Communication cable failure detector | |
| CN2532487Y (en) | metallized film tester | |
| CN2412217Y (en) | Instrument for analyzing edible oil quality when used many times after heated | |
| CN213600816U (en) | On-spot insulating oil dielectric strength testing arrangement that uses | |
| CN207675829U (en) | A kind of portable line influence voltage measuring apparatus | |
| CN1274848A (en) | Detection instrument of ceramic quality of insulator string for AC transmission line | |
| CN217332795U (en) | Experimental circuit and device for measuring equipment grounding continuity | |
| CN1851390A (en) | Inductor-type iron-piece surface coating thickness-measuring instrument | |
| CN219758365U (en) | Portable current clamp | |
| CN210894430U (en) | High-voltage line parameter test wiring adapter | |
| CN2158088Y (en) | Testing meter for electric appliances | |
| CN210015159U (en) | Portable insulation device for simulating hand touch test | |
| CN117706285A (en) | Alternating current high-voltage measurement system with adjustable voltage dividing ratio | |
| CN2065761U (en) | Liquid crystal ad/dc induction electricity testing device | |
| CN2190303Y (en) | Electronic energy-preserving tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |