CN113156332A - Pole-climbing-free leakage checking and shunting device - Google Patents
Pole-climbing-free leakage checking and shunting device Download PDFInfo
- Publication number
- CN113156332A CN113156332A CN202110378142.1A CN202110378142A CN113156332A CN 113156332 A CN113156332 A CN 113156332A CN 202110378142 A CN202110378142 A CN 202110378142A CN 113156332 A CN113156332 A CN 113156332A
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- buckle body
- climbing
- leakage
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- 239000004020 conductor Substances 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims description 51
- 229910052751 metal Inorganic materials 0.000 claims description 51
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 26
- 229910052802 copper Inorganic materials 0.000 claims description 26
- 239000010949 copper Substances 0.000 claims description 26
- 230000005611 electricity Effects 0.000 claims description 6
- 230000001174 ascending effect Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 4
- 208000027418 Wounds and injury Diseases 0.000 abstract 1
- 230000006378 damage Effects 0.000 abstract 1
- 208000014674 injury Diseases 0.000 abstract 1
- 230000009194 climbing Effects 0.000 description 4
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 241000258971 Brachiopoda Species 0.000 description 1
- 241001503987 Clematis vitalba Species 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides a pole climbing-free leakage checking shunt device which comprises a sampling fixed conductor fixed on a pole to be detected, wherein the sampling fixed conductor is fixedly connected with one end of a lead, the other end of the lead is connected with a grounding body, and the lead penetrates through a detection area of a leakage detector. The invention has the advantages that the operators do not need to ascend, the probability of personal injury accidents caused by the fact that the operators easily touch electric leakage parts by mistake in the ascending process is greatly reduced, the personal safety of the operators is effectively protected, and a layer of safety protection is added to the operators on line.
Description
Technical Field
The invention relates to the technical field of electric leakage detection, in particular to a pole climbing-free leakage detection shunt device.
Background
When leakage occurs, a pole climber is used for climbing up a pole, a leakage tester such as a pincerlike ammeter is used for searching a leakage fault point, and referring to a convenient-to-use pincerlike ammeter with Chinese patent publication No. CN208888301U, the convenient-to-use pincerlike ammeter comprises a pincerlike ammeter, a binding clip and a binding clip wrench, the binding clip is arranged above the pincerlike ammeter, the pincerlike ammeter and the binding clip are fixedly connected, the binding clip wrench is positioned at the top end of the outer surface of the right side of the pincerlike ammeter, the binding clip wrench is fixedly connected with the pincerlike ammeter, a negative input end is fixedly arranged at the bottom of the front surface of the pincerlike ammeter, a positive input end is fixedly arranged at the right side of the negative input end, an insulation test accessory interface end is arranged at the right side of the positive input end, the insulation test accessory interface end is fixedly connected with the pincerlike ammeter, a display screen is fixedly arranged above the front surface of the pincerlike ammeter, which is close to the negative input end, a rotary switch is arranged on one side of the front surface of the clip-on ammeter far away from the positive input end, the rotary switch is rotationally connected with the clip-on ammeter, a take-up reel is fixedly arranged on the outer side of the rear surface of the pincer-shaped ammeter and comprises a bottom plate, a take-up pipe, a connecting plate and a probe jack, the bottom plate is fixedly arranged on the outer side of the rear surface of the pincer-shaped ammeter, a wire collecting pipe is arranged on the outer side of the rear surface of the bottom plate, the bottom plate is fixedly connected with the wire take-up pipe, a connecting plate is fixedly arranged on the outer side of the rear surface of the wire take-up pipe, the connecting plate is internally provided with a cavity, the rear surface of the connecting plate is provided with a probe jack, the inner side wall of the binding clip is provided with a connecting rod, the binding clip is fixedly connected with one end of the connecting rod, the other end of the connecting rod is provided with a hook, and the connecting rod is fixedly connected with the hook. The prior art has 2 problems, the first problem is that the climbing is frequent, the falling risk exists, and the operation is time-consuming, labor-consuming and unsafe; the second problem is that the leakage conductor is easy to be touched by mistake in the ascending process, thus threatening the personal safety.
Disclosure of Invention
The invention solves the problems that the detection of electric leakage in the prior art requires climbing and falling risks, and the conductor is easy to be mistakenly touched in the climbing process, so that the personal safety is threatened, and provides the pole-climbing-free leakage detection shunt device.
In order to realize the purpose, the following technical scheme is provided:
the utility model provides a exempt from to step on pole and look for electric leakage diverging device, is including fixing the fixed electric conductor of sampling on treating the measuring pole, the one end of the fixed electric conductor fixedly connected with wire of sampling, the other end of wire is connected with the grounding body, the wire passes electric leakage detector's detection zone.
The pole that awaits measuring includes wire pole and light pole, utilizes the shunt circuit that fixed electric conductor of sampling, wire and grounding body constitute, leads the bottom surface with the electric current reposition of redundant personnel that wire pole and light pole spilt for there is partial electric current to pass through the wire, and the specific current value that the wire flowed just can be measured to the electric leakage detector this moment, lets the operation people directly perceived obtain wire pole and light pole electric leakage condition. The invention has the advantages of safety, potential safety hazard elimination, safety risk reduction, capability of checking the leakage point in the fastest time due to the avoidance of the step of ascending, and reduction of much time for checking. Meanwhile, the electric shock probability caused by ascending is greatly reduced due to the fact that the ascending step is omitted, the power utilization reliability is greatly improved, the power utilization time of a user is prolonged, and more electric charges are brought to the profit for the national grid.
Preferably, the fixed electric conductor comprises a copper mesh belt, conductive metal sheets are arranged at two ends of the copper mesh belt, the lead comprises a conductive wire and an insulating outer sleeve wrapping the conductive wire, the conductive wire is fixed on the conductive metal sheet at one end of the copper mesh belt, and a metal buckle is fixed on the conductive metal sheet at the other end of the copper mesh belt through a screw.
The copper mesh belt is arranged in such a way that the copper mesh belt can be quickly fixed and detached on a rod to be detected through the metal buckle, and the detection efficiency is improved.
Preferably, the metal buckle comprises an upper buckle body and a lower buckle body which are hinged, a buckle groove is formed in one side of the upper buckle body, a buckle piece is arranged on one side of the lower buckle body, the buckle piece penetrates through the buckle groove and is clamped on the outer side of the upper buckle body, the inner distance between the upper buckle body and the lower buckle body is smaller than the thickness of the copper mesh belt, and the upper buckle body and the lower buckle body are elastic conductive metal buckles.
The copper mesh belt is clamped by the force generated by the elastic deformation of the upper buckle body and the lower buckle body, so that the copper mesh belt can be quickly sleeved and fixed on rods to be measured with different diameters.
Preferably, the inner sides of the upper buckle body and the lower buckle body are both provided with biting teeth. The purpose of the invention is to increase the occluding force of the upper buckle body and the lower buckle body and avoid the situation that the copper mesh belt slips off from the rod to be measured due to the looseness of the copper mesh belt caused by insufficient force generated by elastic deformation.
Preferably, the two ends of the lead are provided with metal wiring terminals, each metal wiring terminal comprises a fixing portion and a wiring portion, the lead is wound on the wiring portion, the fixing portions are provided with fixing holes, screws are arranged on the fixing holes, and the metal wiring terminals are fixed on the conductive metal sheets through the screws. The invention aims to increase the connection strength of the lead and the conductive metal sheet and prolong the service life of the device.
Preferably, the conducting wire is wound outside the part of the wire connection part and is provided with a plurality of layers of insulating tapes. The invention aims to avoid the condition that the conductor wire is exposed and wound on the wiring part and is easy to get an electric shock, thereby improving the safety of the invention.
Preferably, the wiring part is provided with a plurality of yielding grooves. The conductor wire is wound in the abdicating groove of the wiring part, and the invention aims to increase the connection strength of the conductor wire and the wiring part and prolong the service life of the device.
Preferably, the grounding body comprises a main body metal sheet, the wires are fixed on the main body metal sheet, and the main body metal sheet is respectively connected with a grounding sheet with holes, a grounding cone and a grounding metal clip through 3 wires. According to the invention, 3 different grounding terminals are arranged, so that most grounding requirements can be met.
The invention has the beneficial effects that: the invention has the advantages of safety, potential safety hazard elimination, safety risk reduction, capability of checking the leakage point in the fastest time due to the avoidance of the step of ascending, and reduction of much time for checking. Meanwhile, the electric shock probability caused by ascending is greatly reduced due to the fact that the ascending step is omitted, the power utilization reliability is greatly improved, the power utilization time of a user is prolonged, and more electric charges are brought to the profit for the national grid.
Drawings
FIG. 1 is a schematic view of the entire structure of the embodiment;
FIG. 2 is a schematic structural diagram of a sampling stationary conductor of an embodiment;
FIG. 3 is a schematic structural view of a metal stud of an embodiment;
FIG. 4 is a schematic structural view of the button according to the embodiment;
FIG. 5 is a schematic structural diagram of a grounding body of the embodiment;
wherein: 1. the device comprises a rod to be measured 2, a sampling fixed conductor 3, a lead 4, a grounding body 5, a leakage detector 21, a copper mesh belt 22, a conductive metal sheet 23, a metal buckle 231, an upper buckle body 232, a lower buckle body 233, a buckle groove 234, a buckle piece 235, a tooth 31, a metal binding post 32, a screw 33, an insulating adhesive tape 311, a fixing part 312 wiring part 313, a fixing hole 314, a yielding groove 41, a main body metal sheet 42, a grounding sheet 43 with holes, a grounding cone 44 and a grounding metal clip.
Detailed Description
Example (b):
this embodiment provides a pole-climbing-free electric leakage checking and shunting device, refer to fig. 1, including fixing the sampling fixed conductor 2 on waiting to survey pole 1, the one end of sampling fixed conductor 2 fixedly connected with wire 3, the other end of wire 3 is connected with grounding body 4, and wire 3 passes the detection zone of electric leakage detector 5.
Referring to fig. 2, the fixed conductor 2 includes a copper mesh belt 21, conductive metal sheets 22 are disposed at two ends of the copper mesh belt 21, the wire 3 includes a conductive wire and an insulating sheath wrapping the conductive wire, the conductive wire is fixed on the conductive metal sheet 22 at one end of the copper mesh belt 21, and a metal buckle 23 is fixed on the conductive metal sheet 22 at the other end of the copper mesh belt 21 through a screw.
Referring to fig. 3, the conductive wire 3 is provided at both ends thereof with metal posts 31, the metal posts 31 include fixing portions 311 and wire portions 312, the conductive wire is wound around the wire portions 312, the fixing portions 311 are provided with fixing holes 313, the fixing holes 313 are provided with screws 32, and the screws 32 fix the metal posts 31 to the conductive metal sheet 22. Referring to fig. 2, the conductive wire is wound around a portion of the outside of the wire connection portion 312 with a plurality of layers of insulating tapes 33.
Referring to fig. 4, the metal buckle 23 includes an upper buckle body 231 and a lower buckle body 232 which are hinged to each other, a buckle groove 233 is formed on one side of the upper buckle body 231, a buckle piece 234 is formed on one side of the lower buckle body 232, the buckle piece 234 passes through the buckle groove 233 and is clamped on the outer side of the upper buckle body 231, the internal distance between the upper buckle body 231 and the lower buckle body 232 is smaller than the thickness of the copper mesh belt 21, and the upper buckle body 231 and the lower buckle body 232 are elastic conductive metal buckles. The inner sides of the upper buckle body 231 and the lower buckle body 232 are provided with teeth 235. The wire connecting portion 312 is provided with a plurality of relief grooves 314. The conductive wire is wound in the relief groove 314 of the wire connection portion 312.
Referring to fig. 5, the grounding body 4 includes a main body metal piece 41, the wires 3 are fixed on the main body metal piece 41, and the main body metal piece 41 is connected with a perforated grounding piece 42, a grounding cone 43 and a grounding metal clip 44 through 3 wires, respectively.
The pole 1 to be tested comprises a telegraph pole and a street lamp pole, and electricity leaked from the telegraph pole and the street lamp pole is shunted to the bottom surface by utilizing a shunt circuit consisting of a sampling fixed conductor 2, a wire 3 and a grounding body 4, so that partial current passes through the wire 3, the specific current value flowing through the wire 3 can be measured by the electric leakage detector 5, and the electric leakage condition of the telegraph pole and the street lamp pole can be visually obtained by an operator. The invention has the advantages of safety, potential safety hazard elimination, safety risk reduction, capability of checking the leakage point in the fastest time due to the avoidance of the step of ascending, and reduction of much time for checking. Meanwhile, the electric shock probability caused by ascending is greatly reduced due to the fact that the ascending step is omitted, the power utilization reliability is greatly improved, the power utilization time of a user is prolonged, and more electric charges are brought to the profit for the national grid.
The specific implementation process of this embodiment is as follows:
the copper mesh belt (21) is tightly attached to a pole (1) to be measured and wound for one circle, the copper mesh belt (21) is placed on a lower buckle body (232), then the copper mesh belt (21) is tensioned, an upper buckle body (231) is pressed downwards, a tooth (235) is inserted into the copper mesh belt (21), a buckle piece (234) is buckled into a buckle groove (233), fixing of a sampling fixed electric conductor (2) is achieved, and then an earthing body (4) is selected according to an earthing object of a field environment to be earthed. Referring to table one, data of an actual measurement scenario is described.
TABLE 1 telegraph pole leakage detecting meter
The grounding body of the transformer near the measuring point is connected by a grounding sheet 42 with a hole, the sandy soil near the measuring point is directly inserted into a grounding cone 43 for measurement, and the reinforcing steel bar of the broken rod root near the measuring point is clamped and connected by a grounding metal clamp 44.
The feasibility of the invention was verified in the following specific cases:
1) the pole upper street lamp in the seedling raising platform area pole leaks electricity in 6 months and 3 days in 2020, and the weather is as follows: and (5) raining. The operator checks all the poles with street lamps one by one, and when checking 12 pole street lamps, the leakage value displayed by the instrument is more than 300 milliamperes. When the power is off, the street lamp is detached to find that the metal gap between the connecting screw and the street lamp shell is too small and is short-circuited by rainwater to cause electric leakage.
2) 5/2020. And (4) tripping the large silt platform area by total protection, and displaying that the leakage value is more than 1200 milliamperes. The field operator detects the downleads on all the poles of the total protection without finding the leakage value. The analysis shows that the leakage point is on the overhead line or other lines and equipment hung on the overhead line. The operating personnel checks all towers one by one, when checking the pole No. 05, the pole No. 05 is a corner pole, the operating personnel uses a leakage current tester to clamp down on the pull wire, and the instrument displays that 800 pairs of leakage values are obtained. After power failure, the pole is climbed to check the strain clamp of the bunched cable, a conducting wire is insulated and damaged at the metal contact position of the strain clamp of the bunched cable, and current passes through the stay wire and is grounded with the pole to cause total protection tripping.
3) The electricity leaks from the dock area in 18 days 3 and 3 months 2020, and the leakage value is more than 100 milliamperes. No leakage value was found after the detection of the downlead on all poles of the total protection. The analysis shows that the leakage point is on the overhead line or other lines and equipment hung on the overhead line. The operation personnel use the pole-climbing-free simple electric leakage checking device of preliminary manufacture to carry out the electric leakage point to every basic pole and look for, when the inspection under pole 03, this pole is 6 meters high for the user's pole, has one row of metal rail down, and the staff will simply shunt device earthing terminal connect under the pole on the metal rail, bind the other end on the pole, detect through the leakage current detector and show that it has 2 milliamperes value of leaking. The operating personnel directly detects with the leakage current detector through this pole of stair climb and discover that its winding has 85 milliampere leakage values at the street lamp line on this pole. And the street lamp wire is detected to be wound on the electric pole to cause insulation breakage.
Claims (7)
1. The utility model provides an exempt from to step on pole and look for electric leakage diverging device, characterized by, is including fixing sampling fixed conductor (2) on waiting to survey pole (1), the one end of sampling fixed conductor (2) fixedly connected with wire (3), the other end of wire (3) is connected with grounding body (4), wire (3) pass the detection zone of electric leakage detector (5).
2. The pole climbing-free electricity leakage checking shunt device according to claim 1, wherein the fixed electric conductor (2) comprises a copper mesh belt (21), conductive metal sheets (22) are arranged at two ends of the copper mesh belt (21), the lead (3) comprises a conductive wire and an insulating outer sleeve wrapping the conductive wire, the conductive wire is fixed on the conductive metal sheet (22) at one end of the copper mesh belt (21), and a metal buckle (23) is fixed on the conductive metal sheet (22) at the other end of the copper mesh belt (21) through a screw.
3. The pole-climbing-free electricity leakage checking shunt device according to claim 2, wherein the metal buckle (23) comprises an upper buckle body (231) and a lower buckle body (232) which are hinged to each other, a buckle groove (233) is formed in one side of the upper buckle body (231), a buckle piece (234) is arranged on one side of the lower buckle body (232), the buckle piece (234) penetrates through the buckle groove (233) and is clamped on the outer side of the upper buckle body (231), the internal distance between the upper buckle body (231) and the lower buckle body (232) is smaller than the thickness of the copper mesh belt (21), and the upper buckle body (231) and the lower buckle body (232) are elastic conductive metal buckles.
4. The pole climbing-free leakage current shunting device for the pole checking according to claim 3, wherein the upper buckle body (231) and the lower buckle body (232) are respectively provided with a tooth (235) at the inner side.
5. The pole-climbing-free electricity leakage checking shunt device according to claim 2, wherein metal terminals (31) are arranged at two ends of the conducting wire (3), each metal terminal (31) comprises a fixing portion (311) and a wiring portion (312), the conducting wire is wound on the wiring portion (312), the fixing portion (311) is provided with a fixing hole (313), a screw (32) is arranged on the fixing hole (313), and the screw (32) fixes the metal terminal (31) on the conductive metal sheet (22).
6. The pole-climbing-free leakage current shunting device for the transformer substation as claimed in claim 5, wherein the conducting wire is wound outside the part of the wire connection part (312) and is provided with a plurality of layers of insulating tapes (33).
7. The pole-climbing-free leakage current shunting device as claimed in claim 5 or 6, wherein the wiring portion (312) is provided with a plurality of abdicating grooves (314).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110378142.1A CN113156332A (en) | 2021-04-08 | 2021-04-08 | Pole-climbing-free leakage checking and shunting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110378142.1A CN113156332A (en) | 2021-04-08 | 2021-04-08 | Pole-climbing-free leakage checking and shunting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113156332A true CN113156332A (en) | 2021-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110378142.1A Pending CN113156332A (en) | 2021-04-08 | 2021-04-08 | Pole-climbing-free leakage checking and shunting device |
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| Country | Link |
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| CN (1) | CN113156332A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007292526A (en) * | 2006-04-24 | 2007-11-08 | Tohoku Electric Power Co Inc | Ground fault locator for service wire |
| KR20090020665A (en) * | 2009-01-17 | 2009-02-26 | 차기만 | Street lamp electric leakage alarm set |
| KR20090069068A (en) * | 2007-12-24 | 2009-06-29 | 주식회사 미로 | Load lamp |
| CN102928755A (en) * | 2012-11-14 | 2013-02-13 | 天津市翔晟远电力设备实业有限公司 | Hand-held insulativity detection device for line pole |
| CN203164352U (en) * | 2013-04-07 | 2013-08-28 | 国家电网公司 | An electric leakage detecting device of a live low-voltage line |
| CN203551717U (en) * | 2013-11-17 | 2014-04-16 | 华北电力大学（保定） | On-line monitoring system for single-phase earth fault of cement pole of distribution network |
| CN107167698A (en) * | 2017-07-20 | 2017-09-15 | 云南电网有限责任公司电力科学研究院 | A kind of leakage current of an arrester live testing device and method |
| CN206832930U (en) * | 2017-05-24 | 2018-01-02 | 中国石油天然气股份有限公司 | Line-to-ground detection means and electric wire lever system |
| CN110726954A (en) * | 2019-10-21 | 2020-01-24 | 云南电网有限责任公司楚雄供电局 | 500kV zinc oxide arrester leakage current exempts from to ascend a height testing arrangement |
-
2021
- 2021-04-08 CN CN202110378142.1A patent/CN113156332A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007292526A (en) * | 2006-04-24 | 2007-11-08 | Tohoku Electric Power Co Inc | Ground fault locator for service wire |
| KR20090069068A (en) * | 2007-12-24 | 2009-06-29 | 주식회사 미로 | Load lamp |
| KR20090020665A (en) * | 2009-01-17 | 2009-02-26 | 차기만 | Street lamp electric leakage alarm set |
| CN102928755A (en) * | 2012-11-14 | 2013-02-13 | 天津市翔晟远电力设备实业有限公司 | Hand-held insulativity detection device for line pole |
| CN203164352U (en) * | 2013-04-07 | 2013-08-28 | 国家电网公司 | An electric leakage detecting device of a live low-voltage line |
| CN203551717U (en) * | 2013-11-17 | 2014-04-16 | 华北电力大学（保定） | On-line monitoring system for single-phase earth fault of cement pole of distribution network |
| CN206832930U (en) * | 2017-05-24 | 2018-01-02 | 中国石油天然气股份有限公司 | Line-to-ground detection means and electric wire lever system |
| CN107167698A (en) * | 2017-07-20 | 2017-09-15 | 云南电网有限责任公司电力科学研究院 | A kind of leakage current of an arrester live testing device and method |
| CN110726954A (en) * | 2019-10-21 | 2020-01-24 | 云南电网有限责任公司楚雄供电局 | 500kV zinc oxide arrester leakage current exempts from to ascend a height testing arrangement |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210723 |
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