CN103308744B - High-tension cable gauze screen ground wire leakage current detector - Google Patents
High-tension cable gauze screen ground wire leakage current detector Download PDFInfo
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- CN103308744B CN103308744B CN201310203073.6A CN201310203073A CN103308744B CN 103308744 B CN103308744 B CN 103308744B CN 201310203073 A CN201310203073 A CN 201310203073A CN 103308744 B CN103308744 B CN 103308744B
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- 230000005611 electricity Effects 0.000 claims abstract description 16
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The present invention relates to high-tension cable gauze screen ground wire Leakage Current detector, it includes Al-alloy casing, supplied by AC/DC electricity device is provided with in Al-alloy casing, pick-up unit, the both positive and negative polarity of supplied by AC/DC electricity device is connected with frequency selection circuit respectively, the secondary side of current sensor is connected with I/V change-over circuit by shielding line, I/V change-over circuit is connected with frequency selection circuit with bidirectional analog amount output port respectively, frequency selection circuit is connected with commutating circuit with filtering circuit respectively, filtering circuit is connected with commutating circuit, commutating circuit is connected with peak response time selection circuit, peak response time selection circuit keeps loop to be connected with the input end of LCD drive circuit with peak value respectively, peak value keeps output terminal and the pressure divider circuit in loop 318, LCD drive circuit and LCD display are electrically connected successively.The invention solves the problem that Timeliness coverage existing cable gauze screen ground wire multipoint earthing causes cable scaling loss.
Description
Technical field
The present invention relates to a kind of detector, especially relate to a kind of high-tension cable gauze screen ground wire Leakage Current detector.
Background technology
At present, the leakage current testing of known high-tension cable gauze screen ground wire does not also include testing regulations in, and domestic do not have this kind of test apparatus yet.
Summary of the invention
In order to solve prior art Problems existing, the invention provides a kind of high-tension cable gauze screen ground wire Leakage Current detector, this detector can detect power cable shield net ground current, judge whether cable shielding mesh ground wire exists the problem of multipoint earthing, solve the problem that existing cable gauze screen ground wire multipoint earthing causes cable scaling loss.
The technical solution adopted in the present invention is:
High-tension cable gauze screen ground wire Leakage Current detector, include Al-alloy casing, supplied by AC/DC electricity device is provided with in Al-alloy casing, pick-up unit and current sensor, described pick-up unit is by I/V change-over circuit, bidirectional analog amount output port, frequency selection circuit, filtering circuit, commutating circuit, peak response time selection circuit, peak value keeps loop, pressure divider circuit, LCD drive circuit and LCD display form, the both positive and negative polarity of described supplied by AC/DC electricity device is connected with frequency selection circuit respectively, the secondary side of described current sensor is connected by the input end of shielding line with I/V change-over circuit, the output terminal of I/V change-over circuit is connected with the input end of frequency selection circuit with bidirectional analog amount output port respectively, the output terminal of frequency selection circuit is connected with the input end of commutating circuit with filtering circuit respectively, the output terminal of filtering circuit is connected with the input end of commutating circuit, the output terminal of commutating circuit is connected with the input end of peak response time selection circuit, the output terminal of peak response time selection circuit keeps loop to be connected with the input end of LCD drive circuit with peak value respectively, peak value keeps output terminal and the pressure divider circuit in loop 318, LCD drive circuit and LCD display are electrically connected successively.
Described high-tension cable gauze screen ground wire Leakage Current detector, is provided with intelligent moisture separating device.
Described intelligent moisture separating device is made up of temperature and humidity controller, fan, well heater and Temperature Humidity Sensor, the input end of described temperature and humidity controller is electrically connected with supplied by AC/DC electricity device, the output terminal of temperature and humidity controller is electrically connected with fan and well heater respectively, and Temperature Humidity Sensor is electrically connected with the signal input part of temperature and humidity controller.
The advantage that the present invention has and effect are:
High-tension cable gauze screen ground wire Leakage Current detector of the present invention has been provided with Al-alloy casing, supplied by AC/DC electricity device and pick-up unit is provided with in Al-alloy casing, power cable shield net ground current can be detected, judge whether cable shielding mesh ground wire exists the problem of multipoint earthing.Current sensor is connected with display section shielding line, due to the shielding action of Al-alloy casing, under making a complete set of equipment be in masked state, avoids the interference of the complicated electric field of test site; Because current sensor and pick-up unit are splits, be convenient to read the numerical value in LCD display; With He Ne laser function and peak-value-holding function, simultaneously owing to having installed intelligent moisture separating device additional, under guaranteeing that instrument is in desirable condition of work all the time, test data is more accurate.Solve the problem that existing cable gauze screen ground wire multipoint earthing causes cable scaling loss.
Accompanying drawing explanation
Fig. 1 is the block scheme of high-tension cable gauze screen ground wire Leakage Current detector of the present invention.
Supplied by AC/DC electricity device 1 in figure, intelligence moisture separating device 2, pick-up unit 3, current sensor 4, I/V change-over circuit 312, bidirectional analog amount output port 313, frequency selection circuit 314, filtering circuit 315, commutating circuit 316, peak response time selection circuit 317, peak value keeps loop 318, pressure divider circuit 319, LCD drive circuit 320, LCD display 321, temperature and humidity controller 207, fan 208, well heater 209, Temperature Humidity Sensor 210, AC Power supply socket 101, air switch 102, fuse 103, transformer 104, bridge rectifier 105, rechargeable battery 106.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, high-tension cable gauze screen ground wire Leakage Current detector of the present invention includes Al-alloy casing, supplied by AC/DC electricity device 1 is provided with in Al-alloy casing, pick-up unit 3 and current sensor 4, described pick-up unit 3 is by I/V change-over circuit 312, bidirectional analog amount output port 313, frequency selection circuit 314, filtering circuit 315, commutating circuit 316, peak response time selection circuit 317, peak value keeps loop 318, pressure divider circuit 319, LCD drive circuit 320 and LCD display 321 form, described supplied by AC/DC electricity device 1 is by AC Power supply socket 101, air switch 102, fuse 103, transformer 104, bridge rectifier 105 and rechargeable battery 106 form.The both positive and negative polarity of described supplied by AC/DC electricity device 1 is connected with frequency selection circuit 314 respectively, the secondary side of described current sensor 4 is connected by the input end of shielding line with I/V change-over circuit 312, the output terminal of I/V change-over circuit 312 is connected with the input end of frequency selection circuit 314 with bidirectional analog amount output port 313 respectively, the output terminal of frequency selection circuit 314 is connected with the input end of filtering circuit 315 with commutating circuit 316 respectively, the output terminal of filtering circuit 315 is connected with the input end of commutating circuit 316, the output terminal of commutating circuit 316 is connected with the input end of peak response time selection circuit 317, the output terminal of peak response time selection circuit 317 keeps loop 318 to be connected with the input end of LCD drive circuit 320 with peak value respectively, peak value keeps output terminal and the pressure divider circuit 319 in loop 318, LCD drive circuit 320 and LCD display 321 are electrically connected successively.
Described high-tension cable gauze screen ground wire Leakage Current detector is also provided with intelligent moisture separating device 2.
Described intelligent moisture separating device 2 is made up of temperature and humidity controller 207, fan 208, well heater 209 and Temperature Humidity Sensor 210, the input end of described temperature and humidity controller 207 is electrically connected with supplied by AC/DC electricity device 1, the output terminal of temperature and humidity controller 207 is electrically connected with fan 208 and well heater 209 respectively, and Temperature Humidity Sensor 210 is electrically connected with the signal input part of temperature and humidity controller 207.
The course of work of the present invention is as follows:
Current sensor collection site data, the data of collection are sent to I/V change-over circuit by shielding line, current signal is converted to voltage signal and gives subsequent conditioning circuit and process by I/V change-over circuit, finally output to LCD display, demonstrate measurement result, simultaneously can by analog output, for recording camera, digital multimeter or registering instrument analysis, device adopts supplied by AC/DC electricity, alternating current 220V power supply is through transformer pressure-reducing, 9V direct current is converted to by bridge rectifier circuit, humiture in Temperature Humidity Sensor harvester case, give temperature and humidity controller, temperature and humidity controller intelligence carries out dehumidifying and being incubated, under making device be in desirable condition of work all the time, complete unit is loaded in aluminium alloy box, aluminium alloy box serves the effect of shielding, avoid the interference of the complicated electric field of test site.
Claims (1)
1. high-tension cable gauze screen ground wire leakage current detector, it is characterized in that including Al-alloy casing, supplied by AC/DC electricity device is provided with in Al-alloy casing, pick-up unit and current sensor, described pick-up unit is by I/V change-over circuit, bidirectional analog amount output port, frequency selection circuit, filtering circuit, commutating circuit, peak response time selection circuit, peak value keeps loop, pressure divider circuit, LCD drive circuit and LCD display form, described supplied by AC/DC electricity device is by AC Power supply socket, air switch, fuse, transformer, bridge rectifier and rechargeable battery form, the both positive and negative polarity of described supplied by AC/DC electricity device is connected with frequency selection circuit respectively, the secondary side of described current sensor is connected by the input end of shielding line with I/V change-over circuit, the output terminal of I/V change-over circuit is connected with the input end of frequency selection circuit with bidirectional analog amount output port respectively, the output terminal of frequency selection circuit is connected with the input end of commutating circuit with filtering circuit respectively, the output terminal of filtering circuit is connected with the input end of commutating circuit, the output terminal of commutating circuit is connected with the input end of peak response time selection circuit, the output terminal of peak response time selection circuit keeps loop to be connected with the input end of LCD drive circuit with peak value respectively, peak value keeps output terminal and the pressure divider circuit in loop, LCD drive circuit and LCD display are electrically connected successively, be provided with intelligent moisture separating device, described intelligent moisture separating device is made up of temperature and humidity controller, fan, well heater and Temperature Humidity Sensor, the input end of described temperature and humidity controller is electrically connected with supplied by AC/DC electricity device, the output terminal of temperature and humidity controller is electrically connected with fan and well heater respectively, and Temperature Humidity Sensor is electrically connected with the signal input part of temperature and humidity controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310203073.6A CN103308744B (en) | 2013-05-28 | 2013-05-28 | High-tension cable gauze screen ground wire leakage current detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310203073.6A CN103308744B (en) | 2013-05-28 | 2013-05-28 | High-tension cable gauze screen ground wire leakage current detector |
Publications (2)
| Publication Number | Publication Date |
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| CN103308744A CN103308744A (en) | 2013-09-18 |
| CN103308744B true CN103308744B (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310203073.6A Active CN103308744B (en) | 2013-05-28 | 2013-05-28 | High-tension cable gauze screen ground wire leakage current detector |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301390A (en) * | 2015-10-16 | 2016-02-03 | 暨南大学 | Wireless insulation monitoring device and monitoring method thereof |
| CN107677914A (en) * | 2017-07-19 | 2018-02-09 | 国网浙江省电力公司衢州供电公司 | A kind of Intelligent household leakage protector and guard method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202126470U (en) * | 2011-04-24 | 2012-01-25 | 许征鹏 | Power cable insulation online monitoring device |
| CN202420692U (en) * | 2011-12-29 | 2012-09-05 | 李成 | Cable metal cover layer grounded current and cable temperature monitoring system |
| CN202433432U (en) * | 2011-11-23 | 2012-09-12 | 陈统 | Power frequency AC measuring stick |
| CN202502133U (en) * | 2012-03-22 | 2012-10-24 | 上海市电力公司 | Online monitoring apparatus for cable sheath grounding currents |
| CN203275495U (en) * | 2013-05-28 | 2013-11-06 | 国家电网公司 | High voltage cable shielding net grounding wire leakage current detector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03214078A (en) * | 1990-01-18 | 1991-09-19 | Mitsubishi Cable Ind Ltd | Diagnosis of deterioration in hot-line insulation |
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2013
- 2013-05-28 CN CN201310203073.6A patent/CN103308744B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202126470U (en) * | 2011-04-24 | 2012-01-25 | 许征鹏 | Power cable insulation online monitoring device |
| CN202433432U (en) * | 2011-11-23 | 2012-09-12 | 陈统 | Power frequency AC measuring stick |
| CN202420692U (en) * | 2011-12-29 | 2012-09-05 | 李成 | Cable metal cover layer grounded current and cable temperature monitoring system |
| CN202502133U (en) * | 2012-03-22 | 2012-10-24 | 上海市电力公司 | Online monitoring apparatus for cable sheath grounding currents |
| CN203275495U (en) * | 2013-05-28 | 2013-11-06 | 国家电网公司 | High voltage cable shielding net grounding wire leakage current detector |
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| CN103308744A (en) | 2013-09-18 |
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