CN106771818A - A kind of overhead transmission line electric leakage addressing instrument - Google Patents
A kind of overhead transmission line electric leakage addressing instrument Download PDFInfo
- Publication number
- CN106771818A CN106771818A CN201710005326.7A CN201710005326A CN106771818A CN 106771818 A CN106771818 A CN 106771818A CN 201710005326 A CN201710005326 A CN 201710005326A CN 106771818 A CN106771818 A CN 106771818A
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- electric leakage
- transmission line
- circuit
- overhead transmission
- jaw
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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
-
- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a kind of overhead transmission line electric leakage addressing instrument, including pincerlike earth leakage tester and power frequency inverter；Pincerlike earth leakage tester includes device body and pincer portion, and pincerlike portion includes two binding clips being pivotally connected with device body, and two binding clips form and iron core is set in the jaw that can be opened and closed, binding clip, and iron core closes to form closed-loop path with jaw, and iron core is provided with Secondary Winding；Signal amplification circuit, sound light alarming circuit and power supply are provided with the cavity volume of device body, the input of signal amplification circuit is connected with Secondary Winding coil, the output end of signal amplification circuit is connected with sound light alarming circuit, and power supply is connected with signal amplification circuit and sound light alarming circuit respectively.The present apparatus can quickly and accurately be diagnosed to be electric leakage position, greatly improve the quick response that transmission line of electricity electric leakage is safeguarded, easy to carry, simple to operate；Can repeatedly use, it is to avoid artificial replacing fault indicator for overhead lines, while use cost is also reduced, it is easy to utilize.
Description
Technical field
The present invention relates to electrical distribution field, more particularly to it is a kind of it is simple to operate, can quickly check that transmission line of electricity leaks electricity position
The repeatable overhead transmission line electric leakage addressing instrument for utilizing put.
Background technology
In the middle of existing power transmission line, especially in the middle of the transmission line of electricity of 0.4KV and 10KV, often occur defeated
Electric line is contacted with branch or other earth conductors, transformer fault, arrester are damaged, the porcelain vase ground connection such as aging and occur larger
Leaky need electrician investigate maintenance.Existing detection mode is by the mounting bracket that is spaced a distance on transmission line of electricity
Ceases to be busy line fault indicator (such as people's match XGDL-JDG open circuits line-failure indicator), drain region is indicated by electromagnetic induction board turning
Domain.But this kind of mode can not accurately judge the particular location of electric leakage, it is necessary to service worker gradually investigates along circuit, and this is for rear
Section circuit is long or region of through mountain forest is particularly difficult, increased the work difficulty of service worker, also reduces operating efficiency；
Meanwhile, fault indicator for overhead lines is arranged at outdoor and is closed design all the year round, and battery just runs out of just only less than half a year
Energy monoblock type is changed, it is impossible to accomplish recycling, while increase the cost of purchase indicator changes difficulty with artificial；And, it is existing
Fault indicator for overhead lines needs nearly 6 hours just to return to normal instruction after circuit recovers normally, and reaction is slow.
Further, occur at other one drain conditions in 6 hours and cannot indicate if running into thunder and lightning weather, it is impossible to adapt to quick at present high
The electricity consumption maintenance needs of effect.
The content of the invention
Present invention aim at provide it is a kind of it is simple to operate, can quickly check that transmission line of electricity electric leakage position can be repeated several times
The overhead transmission line electric leakage addressing instrument for utilizing.
To achieve the above object, the invention discloses a kind of overhead transmission line electric leakage addressing instrument, including pincerlike leakage testses dress
Put and power frequency inverter；
The pincerlike earth leakage tester includes device body and pincer portion, and the pincerlike portion includes two and described device
The binding clip of body pivot joint, two binding clips form and iron core are set in the jaw that can be opened and closed, the binding clip, and the iron core is with described
Jaw closes to form closure inductive loop, and the iron core is provided with Secondary Winding；
Described device body includes being mutually matched and being formed the upper cover part and lower cover portion of a cavity volume, the upper cover part and lower cover
The one end in portion is provided with the semicircle ring portion matched with the jaw, and the pincerlike portion is located between two semicircle ring portions,
The side of upper cover part is provided with binding post, and the semicircular ring portion is located in the jaw and is provided with metal contact element, the metal
Contact is connected conducting with the binding post；
Be provided with signal amplification circuit, sound light alarming circuit and power supply in the cavity volume, the signal amplification circuit it is defeated
Enter end to be connected with the Secondary Winding, the output end of the signal amplification circuit is connected with the sound light alarming circuit, the electricity
Source is connected with the signal amplification circuit and sound light alarming circuit respectively；
The power frequency inverter includes the dc source and inverter that are connected with each other, the live wire of the inverter output end
It is connected with the binding post, zero line grounding, by the device, you can simple, quick to detect electric leakage position.
Further, the metal contact element and pincerlike portion's distance are 0.5-2cm, both ensure that the precision of detection,
The size of the present apparatus has been taken into account simultaneously.
Further, also including many insulating bars of interconnection, the insulating bar two ends are respectively arranged with and are mutually matched
Screwed hole and threaded post, the other end of the upper cover part and lower cover portion be equipped with it is bonded to each other after can be connected with the screwed hole
Half-thread post, using the setting of extension type, alleviate detection operation intensity, increased the flexibility of detection of electrical leakage.
Further, the inverter turns the multi output inverter of 220V/500V for 12V, is set using integral type customizations
Put, not only two kinds of operating modes of 0.4KV and 10KV are met simultaneously, while simplifying operation.
Further, the dc source and inverter are fixedly connected with each other and are integrated, and 3 strings are provided with the dc source
The rechargeable type 3.7V batteries of connection, the power supply be built-in rechargeable type 3.7V power supplys, its be arranged on the one of the lower cover portion side
Charge power supply socket is connected, and this kind sets the repeatable utility that improve the present apparatus.
Further, the input of the signal amplification circuit is provided with shunt circuit, by shunt circuit, can be automatic
The lines branch of negligible small leakage current is discharged, is conducive to locking larger electric leakage circuit.
Further, the shunt circuit is in parallel with the input of the signal amplification circuit, and the shunt circuit includes
The GSS Gear Select Switch of the lower cover portion opposite side is fixedly arranged at, the GSS Gear Select Switch includes three gears, three shelves
Position connects 3 resistance of different resistances respectively, shunts gear using 3 ohm, 30 ohm and 300 ohm stageds, you can meet
Existing operating mode.
Further, the light emitting diode of the sound light alarming circuit is seven color light emitting diodes, its be arranged on it is described
The downside of the relative described device body of jaw, using sound and light alarm mode, expands the recognition capability under the conditions of different operating,
Seven color illumination modes, are more beneficial for identification.
Further, the binding clip is located at the both sides of jaw and is provided with inclined plane, and relative described of two binding clips inclines
Inclined-plane forms wire boot section, this kind set be more beneficial for wire to be detected slide in and out jaw.
Further, the jaw internal diameter is 45-52mm, and this kind of bore can not only accommodate conventional wire to be measured, and
Ensure that the preferable induced-current of acquisition.
Compared with prior art, the advantage of the invention is that：
1st, electric leakage position can be quickly and accurately diagnosed to be, the quick response that transmission line of electricity electric leakage is safeguarded is greatly improved；
2nd, it is not only easy to carry by the ingenious fusion one of pincerlike earth leakage tester and power frequency inverter, and operation
Simply；
3rd, can repeatedly use, it is to avoid artificial replacing fault indicator for overhead lines, while also reduce using into
This, it is easy to utilize.
Below with reference to accompanying drawings, the present invention is further detailed explanation.
Brief description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate, for explaining the present invention, not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of overhead transmission line electric leakage addressing instrument disclosed in the preferred embodiment of the present invention；
Fig. 2 is the knot of pincerlike earth leakage tester first of overhead transmission line electric leakage addressing instrument disclosed in the preferred embodiment of the present invention
Structure schematic diagram；
Fig. 3 is the knot of pincerlike earth leakage tester second of overhead transmission line electric leakage addressing instrument disclosed in the preferred embodiment of the present invention
Structure schematic diagram；
Fig. 4 is the upper cover part structural representation of overhead transmission line electric leakage addressing instrument disclosed in the preferred embodiment of the present invention；
Fig. 5 is the tong head schematic diagram of overhead transmission line electric leakage addressing instrument disclosed in the preferred embodiment of the present invention；
Fig. 6 is the circuit overall schematic diagram of overhead transmission line electric leakage addressing instrument disclosed in the preferred embodiment of the present invention；
Fig. 7 is the sound light alarming circuit schematic diagram of overhead transmission line electric leakage addressing instrument disclosed in the preferred embodiment of the present invention；
Fig. 8 is the circuit shunt circuit schematic diagram of overhead transmission line electric leakage addressing instrument disclosed in the preferred embodiment of the present invention.
Marginal data：
1st, pincerlike earth leakage tester；11st, device body；111st, upper cover part；1111st, binding post；1112nd, metal contact
Part；1113rd, half-thread post；1114th, GSS Gear Select Switch；112nd, lower cover portion；113rd, semicircle ring portion；12nd, pincer portion；121st, clamp
Head；1211st, inclined plane；122nd, jaw；13rd, signal amplification circuit；14th, sound light alarming circuit；141st, light emitting diode；15th, electricity
Source；151st, charge power supply socket；152nd, power switch；16th, shunt circuit；17th, boot section；2nd, power frequency inverter；21st, direct current
Power supply；22nd, inverter；221st, live wire；222nd, zero line；3rd, insulating bar.
Specific embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be defined by the claims
Multitude of different ways with covering is implemented.
Instrument is addressed the invention discloses a kind of electric leakage of overhead transmission line, as Figure 1-Figure 8, including pincerlike earth leakage tester
1st, power frequency inverter 2 and insulating bar 3.Wherein, pincerlike earth leakage tester 1 includes device body 11 and pincer portion 12, pincerlike
Portion includes two binding clips 121 being pivotally connected with device body 11, and two binding clips 121 form the jaw 122 that can be opened and closed, in the present embodiment
In, the internal diameter of jaw 122 is 45-52mm.Iron core is set in binding clip 121, and iron core can be returned with the closed of jaw 122 into closure excitation
Road, iron core is provided with Secondary Winding.And device body 11 includes being mutually matched and being formed the upper cover part 111 and lower cover portion of a cavity volume
112, upper cover part 111 is provided with the semicircle ring portion 113 matched with jaw 122 with one end of lower cover portion 112, wherein, binding clip 121
Lower containment between two relative semicircle ring portions 113, the side of upper cover part 111 is provided with binding post 1111, wherein, on
The semicircle ring portion 113 of cap 111 is located in jaw 122 and is provided with metal contact element 1112, metal contact element 1112 and binding post
1111 connection conductings, in the present embodiment, as shown in figure 4, metal contact element 1112 is the copper set along semicircle ring portion 113 leading
Line, the copper conductor by being wound on binding post 1111 so as to turn on inside device body 11, wherein copper conductor and pincer portion 12 away from
From being 0.5-2cm, not only contribute to reduce the size of whole device, and be advantageously implemented accurate measurement.The two ends of insulating bar 3 point
It is not provided with the screwed hole and threaded post being mutually matched, the other end of upper cover part 111 and lower cover portion 112 is equipped with half-thread post
1113, when upper cover part 111 and the laminating of lower cover portion 112 fixed, two half-thread posts 1113 can be formed one it is complete can be with
The stud of screwed hole threaded connection.Many insulating bars 3 can be by head and the tail connection extension, and so, maintenance electrician can stand defeated
Electric line lower section operation, increases the convenience for using.
Preferably, binding clip 121 is provided with inclined plane 1211, the relative inclination of two binding clips 121 positioned at the both sides of jaw 122
Face forms wire boot section 17, is conducive to line wires to be measured that jaw is slipped into and skidded off in the presence of lower thrust or pulling force
122。
In the present embodiment, as shown in fig. 7, being provided with signal amplification circuit 13, acousto-optic report in the cavity volume of device body 11
Alert circuit 14 and power supply 15, the input of signal amplification circuit 13 are connected with Secondary Winding, the output end of signal amplification circuit 13
It is connected with sound light alarming circuit 14, power supply 15 is connected with signal amplification circuit 13 and sound light alarming circuit 14 respectively, wherein, amplify
The model AD620 technical grade module amplifiers of circuit, sound light alarming circuit 14 is constituted using split type element, its sound and light alarm
Circuit is as shown in Figure 7.Meanwhile, in the present embodiment, the light emitting diode 141 of sound light alarming circuit 14 is using seven color light-emitting diodes
Pipe, its downside for being arranged on the described device body 11 relative with the jaw 122 is easy to different illumination strong using seven glory sources
Range estimation identification under degree.Meanwhile, the alarm sound of the circuit is bigger, further enhancing Fault Identification degree.Wherein, power supply 15 is
The rechargeable type 3.7V lithium batteries of ST-PM 18650, it is connected with the charge power supply socket 151 for being arranged on the side of lower cover portion 112.
In the present embodiment, as it is a kind of preferably, in order to adapt to the various working of 0.4KV and 10KV, while by other small leakage currents
Situation is excluded to be ignored, and shunt circuit 16 is additionally provided with the input of signal amplification circuit 13, and shunt circuit 16 is put with signal
The big input of circuit 13 is in parallel, and shunt circuit 16 includes being fixedly arranged at the GSS Gear Select Switch 1114 of the opposite side of lower cover portion 112, such as schemes
Shown in 8, GSS Gear Select Switch 1114 connects 3 resistance of different resistances respectively, in the present embodiment three resistances of resistance point
Wei 3 ohm, 30 ohm and 300 ohm.
In the present embodiment, power frequency inverter 2 includes the dc source 21 and inverter 22 that are connected with each other, inverter 22
The live wire 221 of output end be connected with binding post 1111, the ground connection of zero line 222 is set, and in the present embodiment, inverter 22 is 12V
Turn 220V/500V Multifunctional inverters, wherein 12V turns electric leakage measurement of the 220V inversions gear used in the low-voltage circuit of 0.4KV, and
12V turns electric leakage measurement of the 500V inversions gear used in the high-tension line of 10KV.In the present embodiment, carry for convenience and grasp
Make, dc source 21 and the integral type of inverter 22 are set, 3 rechargeable type 3.7V batteries of series connection be provided with dc source 21,
And battery use the rechargeable type 3.7V lithium batteries of ST-PM 18650, by this kind of method of external battery can realize with fill with.
The present apparatus is originally based primarily upon electromagnetic induction principle, and its Cleaning Principle is as follows：
When the electric wire in the circuit to be measured of power-off is placed in jaw 122 and with metal contact element 1112 (in the present embodiment
Be copper conductor) keep contact when, if line electrical leakage, can there is the following two kinds situation：
If 1), electric leakage circuit is to point to the direction of jaw 122 from metal contact element 1112, when power frequency inverter 2 is by upper
Cap 111 leaks electricity electricity feeding, and (live wire 221 of the output line of inverter 22 of power frequency inverter 2 connects binding post 1111, zero to circuit
Line 222 is grounded, and closed-loop path is formed by the earth), the electric current of the electric wire for now passing through from jaw 122 enters one from zero growth rate
Secondary Winding in step binding clip 121 produces induced-current input signal amplifying circuit 13, further drives sound light alarming circuit 14,
So as to alarm, light emitting diode is bright.
If 2), electric leakage circuit is to point to the direction of metal contact element 1112 from jaw 122, then from the incoming line of inverter 22
Electric current then without going past jaw 122, but metal contact element 1112 is directly over away from jaw 122, so that in binding clip 121
Secondary Winding will not produce the induced-current, and then sound light alarming circuit 14 will not to alarm.
The use process of the present apparatus is as follows：
First, the live wire 221 of power frequency inverter 2 is connected into binding post 1111, then the grounding of zero line 222 is opened
Power switch 152, makes it power signal amplification circuit 13 and sound light alarming circuit 14, wherein, if detection 0.4KV electric leakages
Circuit, GSS Gear Select Switch 1114 is allocated to and then opens gear selection with 3 ohm of gears, the circuit if detection 10KV leaks electricity
1114 are closed to be allocated to and 300 ohm of gears.Then, the insulating bar 3 for many being linked together is connected to the connection of device body 11
(fitted by the half-thread post 1113 of upper cover part 111 and lower cover portion 112 and formed) on stud, by drain wire top such as pincerlike leakage testses
In the jaw of device 1, while ensuring that metal contact element 1112 keeps contacting with electric leakage circuit, the power supply of inverter 22 is then opened
Switch, by electric current feeding electric leakage circuit, you can the direction of the reaction and judgement electric leakage circuit according to sound light alarming circuit 14, by upper
State repeatedly measurement to exclude, the final accurate location that can determine whether drain wire road.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of overhead transmission line electric leakage addresses instrument, it is characterised in that including pincerlike earth leakage tester and power frequency inverter；
The pincerlike earth leakage tester includes device body and pincer portion, and the pincerlike portion includes two with described device body
The binding clip of pivot joint, two binding clips form and iron core are set in the jaw that can be opened and closed, the binding clip, and the iron core is with the jaw
Closure forms closure inductive loop, and the iron core is provided with Secondary Winding；
Described device body includes being mutually matched and being formed the upper cover part and lower cover portion of a cavity volume, the upper cover part and lower cover portion
One end is provided with the semicircle ring portion matched with the jaw, and the pincerlike portion is located between two semicircle ring portions, upper lid
The side in portion is provided with binding post, and the semicircular ring portion is located at and metal contact element is provided with the jaw, the metal contact
Part is connected conducting with the binding post；
Signal amplification circuit, sound light alarming circuit and power supply, the input of the signal amplification circuit are provided with the cavity volume
It is connected with the Secondary Winding, the output end of the signal amplification circuit is connected with the sound light alarming circuit, the power supply point
It is not connected with the signal amplification circuit and sound light alarming circuit；
The power frequency inverter includes the dc source and inverter that are connected with each other, the live wire of the inverter output end and institute
State binding post connection, zero line grounding.
2. overhead transmission line electric leakage according to claim 1 addresses instrument, it is characterised in that the metal contact element and the pincers
Shape portion distance is 0.5-2cm.
3. overhead transmission line according to claim 1 electric leakage addressing instrument, it is characterised in that also exhausted including many interconnections
Edge bar, the insulating bar two ends are respectively arranged with the screwed hole and threaded post being mutually matched, and the upper cover part and lower cover portion are all provided with
Have it is bonded to each other after the half-thread post that can be connected with the screwed hole.
4. overhead transmission line electric leakage according to claim 1 addresses instrument, it is characterised in that the inverter turns 220V/ for 12V
The multi output inverter of 500V.
5. overhead transmission line electric leakage according to claim 4 addresses instrument, it is characterised in that the dc source and inverter phase
Mutually fix as one, 3 rechargeable type 3.7V batteries of series connection are provided with the dc source, the power supply is built-in rechargeable type
3.7V power supplys, it is connected with the charge power supply socket for being arranged on the lower cover portion side.
6. according to any described overhead transmission line electric leakage addressing instrument of claim 1-5, it is characterised in that the signal amplification circuit
Input be provided with shunt circuit.
7. overhead transmission line electric leakage according to claim 6 addresses instrument, it is characterised in that described in the shunt circuit and signal
The input of amplifying circuit is in parallel, and the shunt circuit includes being fixedly arranged at the GSS Gear Select Switch of the lower cover portion side, described
GSS Gear Select Switch includes three gears, and three gears connect 3 resistance of different resistances respectively.
8. overhead transmission line according to claim 7 electric leakage addressing instrument, it is characterised in that the sound light alarming circuit it is luminous
Diode is seven color light emitting diodes, its downside for being arranged on the described device body relative with the jaw.
9. overhead transmission line electric leakage according to claim 8 addresses instrument, it is characterised in that the binding clip is located at the both sides of jaw
Inclined plane is provided with, two relative inclined planes of the binding clip form wire boot section.
10. overhead transmission line electric leakage according to claim 9 addresses instrument, it is characterised in that the jaw internal diameter is 45-
52mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710005326.7A CN106771818B (en) | 2017-01-04 | 2017-01-04 | A kind of overhead transmission line electric leakage addressing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710005326.7A CN106771818B (en) | 2017-01-04 | 2017-01-04 | A kind of overhead transmission line electric leakage addressing instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106771818A true CN106771818A (en) | 2017-05-31 |
| CN106771818B CN106771818B (en) | 2018-01-12 |
Family
ID=58950075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710005326.7A Active CN106771818B (en) | 2017-01-04 | 2017-01-04 | A kind of overhead transmission line electric leakage addressing instrument |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2403035Y (en) * | 1999-07-07 | 2000-10-25 | 李纪平 | Power line leakage detecting device |
| CN203396893U (en) * | 2013-06-20 | 2014-01-15 | 国家电网公司 | Power line leakage current detection apparatus |
| CN104360236A (en) * | 2014-11-20 | 2015-02-18 | 国家电网公司 | Quick detection complete device and method for electric leakage points of 0.4 kV overhead line |
| CN204188757U (en) * | 2014-09-30 | 2015-03-04 | 广东电网有限责任公司茂名供电局 | Portable power equipment leakage point insulating pick-up unit |
| CN105277842A (en) * | 2015-11-27 | 2016-01-27 | 国网山东省电力公司济南供电公司 | Leakage electric current sensor for electrical device and leakage electric current signal extracting method |
| CN105337253A (en) * | 2014-08-14 | 2016-02-17 | 陕西银河景天电子有限责任公司 | Power grid electric leakage alarm |
| CN205691709U (en) * | 2016-06-24 | 2016-11-16 | 国网山东省电力公司冠县供电公司 | A kind of power cord earth detector |
| CN206331066U (en) * | 2017-01-04 | 2017-07-14 | 陈华军 | A kind of overhead transmission line electric leakage addressing instrument |
-
2017
- 2017-01-04 CN CN201710005326.7A patent/CN106771818B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2403035Y (en) * | 1999-07-07 | 2000-10-25 | 李纪平 | Power line leakage detecting device |
| CN203396893U (en) * | 2013-06-20 | 2014-01-15 | 国家电网公司 | Power line leakage current detection apparatus |
| CN105337253A (en) * | 2014-08-14 | 2016-02-17 | 陕西银河景天电子有限责任公司 | Power grid electric leakage alarm |
| CN204188757U (en) * | 2014-09-30 | 2015-03-04 | 广东电网有限责任公司茂名供电局 | Portable power equipment leakage point insulating pick-up unit |
| CN104360236A (en) * | 2014-11-20 | 2015-02-18 | 国家电网公司 | Quick detection complete device and method for electric leakage points of 0.4 kV overhead line |
| CN105277842A (en) * | 2015-11-27 | 2016-01-27 | 国网山东省电力公司济南供电公司 | Leakage electric current sensor for electrical device and leakage electric current signal extracting method |
| CN205691709U (en) * | 2016-06-24 | 2016-11-16 | 国网山东省电力公司冠县供电公司 | A kind of power cord earth detector |
| CN206331066U (en) * | 2017-01-04 | 2017-07-14 | 陈华军 | A kind of overhead transmission line electric leakage addressing instrument |
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