CN103713273B - A kind of monitor for arrester leakage current trouble-shooter - Google Patents
A kind of monitor for arrester leakage current trouble-shooter Download PDFInfo
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- CN103713273B CN103713273B CN201310724336.8A CN201310724336A CN103713273B CN 103713273 B CN103713273 B CN 103713273B CN 201310724336 A CN201310724336 A CN 201310724336A CN 103713273 B CN103713273 B CN 103713273B
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Abstract
The invention discloses a kind of monitor for arrester leakage current trouble-shooter, it comprises connection point terminal post S1, connection point terminal post S2, connection point terminal post S3, adjustable current source, milliammeter, discharging gap, contact group and test switch knob, described contact group comprises the first to ten two point, connection point terminal post S2 by second lead-in wire respectively with the first contact, 3rd contact, 7th contact is electrically connected respectively, connection point terminal post S3 and the second contact are electrically connected, 4th contact and the 8th contact are electrically connected, 6th contact and the tenth contact are electrically connected, one end of milliammeter is connected between the 4th contact and the 8th contact, the other end is connected between the 6th contact and the tenth contact, the positive pole of described adjustable current source is connected to the 9th contact, its negative pole is connected to the tenth two point.The present invention, by the quality of high precision milliammeter detection monitor of connecting with leakage current monitor, for the leakage current monitor of different internal resistance, all can adopt same set of device.
Description
Technical field
The present invention relates to electrical equipment technical field, be specifically related to monitor for arrester leakage current trouble-shooter.
Background technology
At present, prevent lightning surge and impulse overvoltage many uses metal oxide arrester in electric system, when normally running, lightning arrester will produce certain leakage current, by the size of monitoring leakage electric current, can the degree of aging of auxiliary judgment arrester valve piece.But high-voltage arrester is placed in open air more, its leakage current monitor operating condition is comparatively severe, is easily damaged, affects the normal monitoring of leakage current, cause the degree of aging that normally cannot judge arrester valve piece.
Prior art by a milliammeter in parallel with leakage current monitor, read milliammeter numerical value and with monitor read-around ratio comparatively, judge that when difference is greater than setting value leakage current monitor damages.
The shortcoming of prior art is, utilizes the principle that parallel-current is shunted, and because milliammeter is in parallel with leakage current monitor, monitor internal resistance is different, and the reading of milliammeter, also by difference, judges that the difference damaged is also by difference.Therefore, the ubiquity of prior art application is not high, for dissimilar monitor, need reconfigure completely milliammeter, decision content.And existing technology only can the quality of on-line monitoring leakage current monitor, cannot simultaneously online and off-line state gamut detection and verify quality and the accuracy of monitor.And, during on-line monitoring monitor for arrester leakage current, because lightning arrester is in running status, likely have superpotential at any time and produce, prior art does not configure and suitable prevents superpotential loop, when measuring likely because superpotential causes operating personnel to get an electric shock or instrument burns.
Summary of the invention
For above deficiency, the object of this invention is to provide a kind of monitor for arrester leakage current trouble-shooter, whether it can accurately detect leakage current monitor normal, be applied in transformer station and ancillary staff leakage current monitor quality can be detected in time, and change leakage current monitor when primary equipment does not have a power failure.
For realizing above object, the technical scheme that this invention takes is:
A kind of monitor for arrester leakage current trouble-shooter, described trouble-shooter comprises connection point terminal post S1, connection point terminal post S2, connection point terminal post S3, adjustable current source, milliammeter, contact group and test switch knob, wherein, described contact group comprises the first contact, second contact, 3rd contact, 4th contact, 5th contact, 6th contact, 7th contact, 8th contact, 9th contact, tenth contact, 11 contact, tenth two point, described connection point terminal post S1 is electrically connected with the 5th contact and the 11 contact respectively by the first lead-in wire, connection point terminal post S2 by the second lead-in wire respectively with the first contact, 3rd contact, 7th contact is electrically connected respectively, connection point terminal post S3 and the second contact are electrically connected, 4th contact and the 8th contact are electrically connected, 6th contact and the tenth contact are electrically connected, one end of milliammeter is connected between the 4th contact and the 8th contact, and the other end is connected between the 6th contact and the tenth contact, and the positive pole of described adjustable current source is connected to the 9th contact, its negative pole is connected to the tenth two point, and described test switch knob comprises the first gear for making the first contact and the second contact conducting, for making the second gear of the 3rd contact and the 4th contact conducting and the 5th contact and the 6th contact conducting, for making the 7th contact and the 8th contact conducting, the third gear of the 9th contact and the tenth contact conducting and the 11 contact and the tenth two point conducting.
When this trouble-shooter is used for carrying out off-line measurement to leakage current monitor fault, connection point terminal post S1 is connected between lightning arrester base and leakage current monitor, connection point terminal post S2 is connected between leakage current monitor and cut-off point, and described test switch knob switches to third gear.
When this trouble-shooter is used for carrying out on-line measurement to leakage current monitor fault, connection point terminal post S1 is connected between leakage current monitor and cut-off point, connection point terminal post S2 ground connection, connection point terminal post S3 is connected between lightning arrester base and leakage current monitor, and described test switch knob rotates to the second gear.
During for changing online leakage current monitor, connection point terminal post S1 is connected between leakage current monitor and cut-off point, connection point terminal post S2 ground connection, connection point terminal post S3 is connected between lightning arrester base and leakage current monitor, and described test switch knob rotates to the first gear.
Seamless switching is switched between first gear of described test switch knob, the second gear and third gear.
This trouble-shooter comprises discharging gap further, and the two ends of described discharging gap are connected on the first lead-in wire and the second lead-in wire.
Compared with prior art, its beneficial effect is in the present invention:
1, by the quality of high precision milliammeter detection monitor of connecting with leakage current monitor, owing to adopting series circuit, to the internal resistance no requirement (NR) of milliammeter, for the leakage current monitor of different internal resistance, all same set of device can be adopted.
2, device inside is configured with discharging gap and protective ground, prevents the superpotential of lightning arrester during on-line measurement from working the mischief to the person and equipment.
3, device inside is configured with adjustable current source, by inner commutation circuit, can realize respectively the online of leakage current monitor and offline inspection.
4, because ER effect is adjustable, can detect leakage current monitor gamut, in gamut, judge that whether monitor is accurate.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of monitor for arrester leakage current trouble-shooter of the present invention;
Fig. 2 is the circuit theory diagrams of Fig. 1;
Fig. 3 is the wiring diagram of a kind of monitor for arrester leakage current trouble-shooter of the present invention offline inspection;
Fig. 4 is the wiring diagram of a kind of monitor for arrester leakage current trouble-shooter of the present invention on-line checkingi.
Wherein: 100, trouble-shooter; 101, adjustable current source; 102, milliammeter; 103, discharging gap; 104, contact group; 105, ground terminal post; 106, charging inlet; 107, rechargeable battery; 108, switch knob is tested; 109, current adjusting knob; 110, off-line measurement stop button; 111, off-line measurement start button; 200, lightning arrester base; 300, leakage current monitor; 400, cut-off point.
Embodiment
Below in conjunction with the drawings and specific embodiments, content of the present invention is described in further details.
Embodiment
Please refer to shown in Fig. 1 and Fig. 2, a kind of monitor for arrester leakage current trouble-shooter, it comprises connection point terminal post S1, connection point terminal post S2, connection point terminal post S3, adjustable current source 101, milliammeter 102, discharging gap 103, contact group 104, ground terminal post 105, charging inlet 106, rechargeable battery 107, test switch knob 108, current adjusting knob 109 and off-line measurement stop button 110 and off-line measurement start button 111.
Wherein, contact group 104 comprises six to corresponding contact, be respectively (1 of the first contact and the second contact composition, 2) contact, 3rd contact and the 4th contact composition (3, 4) contact, 5th contact and the 6th contact composition (5, 6) contact, 7th contact and the 8th contact composition (7, 8) contact, 9th contact and the tenth contact composition (9, 10) contact and the 11 contact and the tenth two point composition (11, 12) contact, connection point terminal post S1 is electrically connected with the 5th contact and the 11 contact respectively by the first lead-in wire, connection point terminal post S2 by second lead-in wire respectively with the first contact, 3rd contact, 7th contact is electrically connected respectively, connection point terminal post S3 and the second contact are electrically connected, 4th contact and the 8th contact are electrically connected, 6th contact and the tenth contact are electrically connected.Seamless switching is switched between test the first gear of switch knob 108, the second gear and third gear.
One end of milliammeter 102 is connected between the 4th contact and the 8th contact, and the other end is connected between the 6th contact and the tenth contact, and the positive pole of adjustable current source 101 is connected to the 9th contact, and its negative pole is connected to the tenth two point.
Test switch knob 108 comprises for making the first gear of (1,2) contact conducting, for making second gear of (3,4) contact conducting and (5,6) contact conducting, for making the third gear of (7,8) contact, (9,10) contact and (11,12) contact conducting.
When trouble-shooter 100 uses, ground terminal post 105 carries out grounding.Charging inlet 106 charges for rechargeable battery 107, and rechargeable battery 107 provides adjustable current source 101 by certain driving circuit, and current adjusting knob 109 regulates by controlling the output current size of driving circuit to adjustable current source 101.
Lightning surge and impulse overvoltage many uses metal oxide arrester is prevented in electric system, when normally running, lightning arrester will produce certain leakage current, by the size of monitoring leakage electric current, can the degree of aging of auxiliary judgment arrester valve piece, the upper end of leakage current monitor 300 is connected to lightning arrester base 200, its lower end ground connection, arranges a cut-off point 400 between the lower end and ground wire of leakage current monitor 300 simultaneously.
This trouble-shooter 100 can be applicable to replacing leakage current monitor 300 being carried out to off-line measurement, on-line measurement and online leakage current monitor 300, specific as follows:
1. off-line measurement
Please refer to shown in Fig. 3, connection point terminal post S1, connection point terminal post S2 connects lower end and the upper end of leakage current monitor respectively, ground terminal post 105 protective ground, test switch knob 108 is threaded to third gear, (7, 8), (9, 10), (11, 12) contact conducting, start off-line measurement start button 111, milliammeter 102 is connected with leakage current monitor 300, adjustable current source 101 sends steady current, regulate current adjusting knob 109, judge that whether leakage current monitor is normal by comparing both gamuts reading (i.e. the reading of milliammeter 102 and leakage current monitor 300), measure and terminate, start off-line measurement stop button 110.
2. on-line measurement
Please refer to shown in Fig. 4, first connection point terminal post S3 is connected to the upper end of leakage current monitor 300, connection point terminal post S1 is connected to the lower end of leakage current monitor 300, the direct ground connection of connection point terminal post S2, test switch knob 108 is threaded to the first gear, now (1,2) contact conducting, leakage current will by trouble-shooter 100 directly ground connection.Rotary test switch knob 108 to the second gear, now (3,4), (5,6) contact conducting, milliammeter 102 is connected with leakage current monitor 300, judges that whether leakage current monitor is normal by comparing both readings.The seamless switching that test switch knob 108 adopts, namely there is the time period of conducting simultaneously in (1,2) and (3,4) contact, prevent lightning arrester tail end in handoff procedure unearthed, in like manner, all there is the time period of conducting simultaneously in (3,4) and (7,8) contact and (7,8) and (1,2) contact.
3. online replacing leakage current monitor
If find during on-line measurement, leakage current monitor 300 damages, and test switch knob 108 can be threaded to the first gear, now leakage current of an arrester is by this device ground connection, can change leakage current monitor by direct-on-line.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and this embodiment is also not used to limit the scope of the claims of the present invention, and the equivalence that all the present invention of disengaging do is implemented or changed, and all should be contained in the scope of the claims of this case.
Claims (6)
1. a monitor for arrester leakage current trouble-shooter, is characterized in that, described trouble-shooter (100) comprises connection point terminal post S1, connection point terminal post S2, connection point terminal post S3, adjustable current source (101), milliammeter (102), contact group (104) and test switch knob (108), wherein, described contact group (104) comprises the first contact, second contact, 3rd contact, 4th contact, 5th contact, 6th contact, 7th contact, 8th contact, 9th contact, tenth contact, 11 contact, tenth two point, described connection point terminal post S1 is electrically connected with the 5th contact and the 11 contact respectively by the first lead-in wire, connection point terminal post S2 by the second lead-in wire respectively with the first contact, 3rd contact, 7th contact is electrically connected respectively, connection point terminal post S3 and the second contact are electrically connected, 4th contact and the 8th contact are electrically connected, 6th contact and the tenth contact are electrically connected, one end of milliammeter (102) is connected between the 4th contact and the 8th contact, the other end is connected between the 6th contact and the tenth contact, the positive pole of described adjustable current source (101) is connected to the 9th contact, its negative pole is connected to the tenth two point, and described test switch knob (108) comprises the first gear for making the first contact and the second contact conducting, for making the second gear of the 3rd contact and the 4th contact conducting and the 5th contact and the 6th contact conducting, for making the 7th contact and the 8th contact conducting, the third gear of the 9th contact and the tenth contact conducting and the 11 contact and the tenth two point conducting.
2. monitor for arrester leakage current trouble-shooter according to claim 1, it is characterized in that, when this trouble-shooter (100) is for carrying out off-line measurement to leakage current monitor fault, connection point terminal post S1 is connected between lightning arrester base (200) and leakage current monitor (300), connection point terminal post S2 is connected between leakage current monitor (300) and cut-off point (400), and described test switch knob (108) switches to third gear.
3. monitor for arrester leakage current trouble-shooter according to claim 1, it is characterized in that, when this trouble-shooter (100) is for carrying out on-line measurement to leakage current monitor fault, connection point terminal post S1 is connected between leakage current monitor (300) and cut-off point (400), connection point terminal post S2 ground connection, connection point terminal post S3 is connected between lightning arrester base (200) and leakage current monitor (300), and described test switch knob (108) rotates to the second gear.
4. monitor for arrester leakage current trouble-shooter according to claim 3, it is characterized in that, during for changing online leakage current monitor, connection point terminal post S1 is connected between leakage current monitor (300) and cut-off point (400), connection point terminal post S2 ground connection, connection point terminal post S3 is connected between lightning arrester base (200) and leakage current monitor (300), and described test switch knob (108) rotates to the first gear.
5. the monitor for arrester leakage current trouble-shooter according to any one of claim 1-4, is characterized in that, switches to seamless switching between the first gear of described test switch knob (108), the second gear and third gear.
6. monitor for arrester leakage current trouble-shooter according to claim 1, it is characterized in that, this trouble-shooter (100) comprises discharging gap (103) further, and the two ends of described discharging gap (103) are connected on the first lead-in wire and the second lead-in wire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310724336.8A CN103713273B (en) | 2013-12-24 | 2013-12-24 | A kind of monitor for arrester leakage current trouble-shooter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310724336.8A CN103713273B (en) | 2013-12-24 | 2013-12-24 | A kind of monitor for arrester leakage current trouble-shooter |
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| Publication Number | Publication Date |
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| CN103713273A CN103713273A (en) | 2014-04-09 |
| CN103713273B true CN103713273B (en) | 2016-03-02 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107167753B (en) * | 2017-06-13 | 2023-07-18 | 国网山东省电力公司龙口市供电公司 | Lightning arrester resistive current monitor inspection device and use method thereof |
| CN111812458B (en) * | 2020-05-21 | 2021-11-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for testing temporary overvoltage limit tolerance characteristic of lightning arrester of direct current transfer switch |
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| DE4124474A1 (en) * | 1990-08-20 | 1993-01-28 | Fritz Sauter Ag | Single phase electricity meter testing circuit - connects meters together with some negative and positive current at low levels with voltage supplies differing only in polarity |
| CN2129934Y (en) * | 1991-11-27 | 1993-04-14 | 田径 | Relay protective test device |
| JP4672785B2 (en) * | 2009-05-27 | 2011-04-20 | 有限会社海栄電気 | Control panel failure diagnosis device |
| CN203069752U (en) * | 2013-01-22 | 2013-07-17 | 锦州华信开关电器有限责任公司 | Comprehensive test platform |
| JP2013537313A (en) * | 2010-09-17 | 2013-09-30 | エスケー イノベーション カンパニー リミテッド | Insulation resistance measurement circuit with self-test function without generating leakage current |
| CN203705630U (en) * | 2013-12-24 | 2014-07-09 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault diagnosis device for leakage current monitor of arrester |
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2013
- 2013-12-24 CN CN201310724336.8A patent/CN103713273B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4124474A1 (en) * | 1990-08-20 | 1993-01-28 | Fritz Sauter Ag | Single phase electricity meter testing circuit - connects meters together with some negative and positive current at low levels with voltage supplies differing only in polarity |
| CN2129934Y (en) * | 1991-11-27 | 1993-04-14 | 田径 | Relay protective test device |
| JP4672785B2 (en) * | 2009-05-27 | 2011-04-20 | 有限会社海栄電気 | Control panel failure diagnosis device |
| JP2013537313A (en) * | 2010-09-17 | 2013-09-30 | エスケー イノベーション カンパニー リミテッド | Insulation resistance measurement circuit with self-test function without generating leakage current |
| CN203069752U (en) * | 2013-01-22 | 2013-07-17 | 锦州华信开关电器有限责任公司 | Comprehensive test platform |
| CN203705630U (en) * | 2013-12-24 | 2014-07-09 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault diagnosis device for leakage current monitor of arrester |
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