CN108872763A - A kind of earth detector and electrical leakage detecting method - Google Patents
A kind of earth detector and electrical leakage detecting method Download PDFInfo
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- CN108872763A CN108872763A CN201810420769.7A CN201810420769A CN108872763A CN 108872763 A CN108872763 A CN 108872763A CN 201810420769 A CN201810420769 A CN 201810420769A CN 108872763 A CN108872763 A CN 108872763A
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
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- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention provides a kind of earth detector and electrical leakage detecting method, including detection of electrical leakage terminal, hand-held mobile terminal, concentrator and host computer, detection of electrical leakage terminal includes sequentially connected current transformer, first memory module and wirelessly from node module, hand-held mobile terminal includes the second memory module interconnected and wireless host node module, wirelessly data are transmitted in a wireless form from node module to wireless host node module and concentrator, hand-held mobile terminal is equipped with data read port and display, concentrator connects host computer, host computer can also read data by data read port.A kind of earth detector and electrical leakage detecting method provided by the invention can quickly detect route or whether equipment leaks electricity and the size of electrical leakage quantity；Have low cost, high-precision feature；Cloud computing analysis can be carried out using measurement result by data acquisition system measured by multiple electric leakage nodes at big data.
Description
Technical field
The present invention relates to detection of electrical leakage technical field more particularly to a kind of earth detectors and electrical leakage detecting method.
Background technique
Deepening constantly and promoting with the construction of China's smart grid, the intelligent distribution area of residential electricity consumption and rural electricity consumption
Construction also has been greatly developed, at present the rural power distribution platform areas in residential electricity consumption and many areas be assembled with intelligent total security or
Earth leakage protective device can be monitored and be protected to the residual current in platform area in real time by these smart machines, mentioned significantly
The supervision to residual current is risen.But since rural line aging, reconfiguration phenomenon are serious, drain conditions are more, thus agriculture
Platform area of village intelligence total security Frequent trip, influences the daily electricity consumption of rural resident.Have a power failure to reduce tripping, improves power quality, it is more
Rural area platform area intelligence total security does not put into operation really, there are a large amount of electric leakage electric shock risks, rural resident's power quality and Electrical Safety
Status causes anxiety.Accordingly, it is desirable to provide a kind of reliable, effective detection of electrical leakage and examination device.
To improve rural resident's electricity consumption reliability, leak current fault is checked, there are two types of detection of electrical leakage modes at present：
One, using intelligent earth leakage protective device, to acquire user's residual current value and store, leakage current reach threshold value and
When power off, ensure Electrical Safety.Disadvantage is that：Single device can only be checked independently, can not summarize unified view；Volume
It is larger, and without three proofings function；It needs to power off when installation, influences user power utilization；Installation is big, promotes higher cost.
Two, using hand-held leakage detector.Hand-held leakage detector is made of pincerlike gauge outfit and table body, pincerlike gauge outfit
For closeable split core type current transformer, when detection, test line is vised, test line remaining power signal can be obtained, is led to
Calculating and conversion are crossed, the display screen display on table body measures numerical value.Disadvantage is that：Hand-held earth detection instrument is surveyed
Data can not assemble big data, and information correlativity is not strong, can not maximally utilize measurement result and carry out cloud computing analysis；As
The electronic current mutual inductor of metering, measurement accuracy are ampere levels, and work as user's residual current and reach 35mA, that is, reach house
It protects and the action value of each earth leakage protective device lowest gear, the measurement accuracy of general hand-held leakage detector, which is difficult to meet use, to be wanted
It asks.
Summary of the invention
The purpose of the present invention is to provide one kind can accurately detect the high earth detector of electric leakage data, detection efficiency
And electrical leakage detecting method.
In order to achieve the above object, the present invention adopts the following technical scheme that：
A kind of earth detector, including detection of electrical leakage terminal and reception terminal, the detection of electrical leakage terminal are mounted to electricity
At node to be measured in net, the detection of electrical leakage terminal includes current transformer, the first memory module and wirelessly from node module,
The current transformer detects the electric leakage data at node to be measured and electric leakage data is stored in first memory module, described
Wirelessly the electric leakage data that first memory module stores wirelessly are sent to the reception terminal from node module.
Further, the reception terminal is hand-held mobile terminal, and the hand-held mobile terminal includes wireless host node mould
Block, the wireless host node module receive the electric leakage data wirelessly issued from node by wireless network.
Further, the hand-held mobile terminal is equipped with the display of display electric leakage data.
Further, the detection of electrical leakage terminal has several, and several detection of electrical leakage terminals are mounted into power grid
At each node to be measured, the hand-held mobile terminal is equipped with the second memory module and data read port, the data read port
It is connected with host computer, the host computer receives the electric leakage data of the second memory module storage and is analyzed and processed.
Further, the detection of electrical leakage terminal has several, and several detection of electrical leakage terminals are mounted into power grid
At each node to be measured, the reception terminal is concentrator, and the concentrator is connected with host computer, and the concentrator receives each electric leakage
The electric leakage data of the detection of detection terminal and each node issued are simultaneously transmitted to the host computer, and the host computer receives the concentration
The electric leakage data for each node that device forwarding comes simultaneously are analyzed and processed.
Further, the current transformer includes openable and closable left iron core and right iron core and is wrapped in the left iron core
With the winding on right iron core, the left iron core and right iron core are in semi-circular shape, between the left iron core and right iron core include several
Every the short lamination and long lamination of setting, the end of the short lamination is shorter than the long lamination, the left iron core and the right side
Iron core closes up the long lamination of rear one of iron core and the short lamination pairing of another iron core.
Further, the current transformer includes the active compensation circuit connecting with the winding, the active compensation
Circuit is made of voltage follower circuit, integrating circuit, amplifying circuit and mutual conductance amplifying circuit.Active compensation circuit is first by iron
The induced voltage of detection winding in core extracts, this induced voltage is exactly what error current generated, then by the induced voltage
Integral and enhanced processing are carried out, the voltage that amplifying circuit exports is converted into electric current finally by mutual conductance amplifying circuit and is injected into benefit
It repays in winding, to realize the purpose of active compensation, to reduce measurement error, improves measurement accuracy.
Further, shielding housing is equipped with outside the left iron core and right iron core.
The present invention also provides a kind of electrical leakage detecting methods, include the following steps：
A1, detection of electrical leakage terminal is mounted at the node to be measured into power grid, the current transformer inspection of detection of electrical leakage terminal
Electric leakage data are simultaneously stored in the first memory module of detection of electrical leakage terminal by the electric leakage data surveyed at node to be measured；A2, electric leakage
The wireless electric leakage data that the storage of the first memory module is wirelessly sent out from node module of detection terminal, hold movement
The wireless host node module of terminal receives the electric leakage data wirelessly issued from node by wireless network；A3, pass through hand-held movement
The electric leakage data that display in terminal is shown judge whether the node leaks electricity and the size of electrical leakage quantity；
Alternatively, b1, each detection of electrical leakage terminal mounted at each node to be measured into power grid, the electricity of each detection of electrical leakage terminal
Current transformer detects the electric leakage data at each node to be measured and electric leakage data is stored in the first of each detection of electrical leakage terminal respectively
In memory module；B2, the wireless of each detection of electrical leakage terminal are wirelessly sent out the first memory module from node module and deposit
The electric leakage data of storage, concentrator receive the electric leakage data of each each node wirelessly issued from node module and are transmitted to host computer；
B3, host computer receive the electric leakage data for each node that concentrator forwarding comes and are analyzed and processed；
Alternatively, c1, each detection of electrical leakage terminal mounted at each node to be measured into power grid, the electricity of each detection of electrical leakage terminal
Current transformer detects the electric leakage data at each node to be measured and electric leakage data is stored in the first of each detection of electrical leakage terminal respectively
In memory module；C2, the wireless of each detection of electrical leakage terminal are wirelessly sent out the first memory module from node module and deposit
The electric leakage data of storage, wireless host node module on hand-held mobile terminal are received by wireless network and each are wirelessly issued from node
Electric leakage data are simultaneously stored in the second memory module of hand-held mobile terminal by electric leakage data；C3, host computer pass through hand-held movement
Data read port in terminal receives the electric leakage data of the second memory module storage and is analyzed and processed.
After adopting the above technical scheme, the invention has the advantages that：
1, the drain conditions and electrical leakage quantity size of node to be measured are detected by the current transformer of detection of electrical leakage terminal, and
By the way that electric leakage data are wirelessly transferred to reception terminal in the form of being wirelessly transferred from node module, realize quickly detection route or are set
It is standby whether to leak electricity and the purpose of the size of electrical leakage quantity.
2, hand-held mobile terminal can be used as terminal, hand-held mobile terminal is received, detection of electrical leakage is received by wireless network
The electric leakage data that terminal issues, hand-held mobile terminal can be carried and with operator's movements, facilitate operator to leakage
The measurement of electric data, the display being arranged on hand-held mobile terminal can show the received electric leakage data of hand-held mobile terminal, side
Just operator checks.
3, multiple detection of electrical leakage terminals can be hung on respectively at each node to be measured, and whole as receiving using concentrator
End, concentrator receive the electric leakage data that detection of electrical leakage terminal issues by wireless network, and the data forwarding that will leak electricity is to host computer,
Host computer can carry out cloud computing analysis using measurement result by data acquisition system measured by multiple electric leakage nodes at big data.
4, when the electric leakage data for needing to measure multiple nodes to be measured but concentrator or concentrator inconvenient to use are difficult to
When establishing connection with detection of electrical leakage terminal, hand-held mobile terminal can be used as terminal is received, whether can be covered according to wireless network
Each node to be measured is covered, selection uses a hand-held mobile terminal or multiple hand-held mobile terminals, is arranged in hand-held mobile terminal
Second memory module is used to store each electric leakage data, and host computer reads each electric leakage data by data read port, and will
Data acquisition system measured by multiple electric leakage nodes carries out cloud computing analysis at big data, using measurement result.
5, current transformer uses more core structures, increases the iron core magnetic conduction of current transformer, and magnetic induction intensity improves,
Winding loss reduces, the improved efficiency of current transformer, and short lamination and long lamination interlock closed assembly, the seam of adjacent layer
It is staggered, reduces the adverse effect to the magnetic line of force in this way, improve detection accuracy.
6, active compensation circuit is arranged in current transformer, realizes the zero-flux current transformer of magnetomotive force compensation, can reach
Measure the ability and higher precision of minimum 1mA electric current.
7, near nodal to be measured often has heavy-duty generator group, and the loop current of heavy-duty generator group is big, and every phase
Spacing distance is closer, therefore can generate very strong electromagnetic field, and the electromagnetic field that setting shielding housing shielding generating set generates is to keep away
Exempt from the interference to mutual inductor, to reduce measurement error, improves measurement accuracy.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings：
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1.
Fig. 2 is the structural schematic diagram of current transformer.
Fig. 3 is the enlarged drawing in Fig. 2 at A.
Fig. 4 is the active compensation circuit diagram of current transformer.
Fig. 5 is the structural schematic diagram of the embodiment of the present invention 2.
Fig. 6 is the structural schematic diagram of the embodiment of the present invention 3.
Marked the names of the parts are as follows in figure：
1, detection of electrical leakage terminal；101, current transformer；102, the first memory module；103, wirelessly from node module；2,
Hand-held mobile terminal；201, wireless host node module；202, display；203, the second memory module；204, data read port；
3, concentrator；4, host computer；1001, left iron core；1002, right iron core；2001, housing is shielded；3001, left semi-circular shell；
3002, right semi-circular shell 4001, short lamination；4002, long lamination.
Specific embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Embodiment 1：As shown in Figure 1, the present invention provides a kind of earth detector, including detection of electrical leakage terminal 1 and hand-held
Mobile terminal 2.
Detection of electrical leakage terminal 1 is including current transformer 101, the first memory module 102 and wirelessly from node module 103, hand
Holding mobile terminal 2 includes wireless host node module 201 and display 202.Current transformer 101 detects the leakage at node to be measured
Electric leakage data are simultaneously stored in the first memory module 102 by electric data, are wirelessly wirelessly sent out the from node module 103
The electric leakage data of one memory module 102 storage.Wireless host node module 201 on hand-held mobile terminal 2 is connect by wireless network
The electric leakage data that detection of electrical leakage terminal 1 issues are received, and are shown on display 202.
As shown in Fig. 2, current transformer 101 is Open Type Electric Current Mutual Inductor, current transformer 101 includes left iron core 1001
With right iron core 1002, winding is wound on left iron core 1001 and right iron core 1002, left iron core 1001 and right iron core 1002 are in semicircle
Shielding housing 2001 is respectively equipped with outside annular, left iron core 1001 and right iron core 1002, left iron core 1001 passes through epoxy resin encapsulated
It being fixed in left semi-circular shell 3001, right iron core 1002 is fixed in right semi-circular shell 3002 by epoxy resin encapsulated,
Left semi-circular shell 3001 and right semi-circular shell 3002 are oppositely arranged, and are fixed together by a detachable connecting device,
An annular is collectively formed.
As shown in figure 3, left iron core 1001 and right iron core 1002 respectively include several spaced short 4001 Hes of lamination
Long lamination 4002, the end of short lamination 4001 is shorter than long lamination 4002, after left iron core 1001 and right iron core 1002 close up
The long lamination 4002 of one of iron core and 4001 pairing of short lamination of another iron core.
Current transformer 101 further includes the active compensation circuit connecting with winding, as shown in figure 4, active compensation circuit by
Voltage follower circuit, integrating circuit, amplifying circuit and mutual conductance amplifying circuit composition.Active compensation circuit first will be in iron core
The induced voltage of detection winding extracts, this induced voltage is exactly what error current generated, then accumulates the induced voltage
Point and enhanced processing, the voltage that amplifying circuit exports is converted into electric current finally by mutual conductance amplifying circuit and is injected into compensative winding
In, to realize the purpose of active compensation.
The present invention also provides a kind of electrical leakage detecting methods of earth detector based on embodiment 1, include the following steps：
A1, by the mounting of detection of electrical leakage terminal 1 at node to be measured into power grid, the current transformer of detection of electrical leakage terminal 1
101 detect the electric leakage data at nodes to be measured and data of leaking electricity are stored in the first memory module 102 of detection of electrical leakage terminal 1
In；A2, the wireless of detection of electrical leakage terminal 1 are wirelessly sent out what the first memory module 102 stored from node module 103
The wireless host node module 201 of electric leakage data, hand-held mobile terminal 2 is received wirelessly by wireless network from the sending of node 103
Electric leakage data；A3, judged by the electric leakage data that display 202 on hand-held mobile terminal 2 is shown the node whether leak electricity and
The size of electrical leakage quantity.
Embodiment 2：As shown in figure 5, the present invention provides a kind of earth detector, including detection of electrical leakage terminal 1, concentration
Device 3 and host computer 4.
Detection of electrical leakage terminal 1 has several, is hung at each node to be measured respectively.Each detection of electrical leakage terminal 1 includes electricity
Current transformer 101, the first memory module 102 and wirelessly from node module 103.Current transformer 101 detects at node to be measured
Electric leakage data are simultaneously stored in the first memory module 102 by electric leakage data, are wirelessly wirelessly sent out from node module 103
The electric leakage data of first memory module 102 storage.Concentrator 3 receives each detection of electrical leakage terminal 1 and wirelessly issues from node module 103
Data-signal and be transferred to host computer 4, host computer 4 at big data, utilizes data acquisition system measured by multiple electric leakage nodes
Measurement result carries out cloud computing analysis.
The structure of current transformer 101 is identical in the structure with embodiment 1 of current transformer 101 in embodiment 2.
The present invention also provides a kind of electrical leakage detecting methods of earth detector based on embodiment 2, include the following steps：
B1, by the mounting of each detection of electrical leakage terminal 1 at each node to be measured into power grid, the electric current of each detection of electrical leakage terminal 1
Mutual inductor 101 detects the electric leakage data at each node to be measured and the data that will leak electricity respectively are stored in the of each detection of electrical leakage terminal 1
In one memory module 102；B2, the wireless of each detection of electrical leakage terminal 1 are wirelessly sent out first from node module 103 and deposit
The electric leakage data that module 102 stores are stored up, concentrator 3 receives the electric leakage data of each each node wirelessly issued from node module 103
And it is transmitted to host computer 4；B3, host computer 4 receive the electric leakage data for each node for concentrating the forwarding of 3 devices and are analyzed and processed.
Embodiment 3：As shown in fig. 6, the present invention provides a kind of earth detector, including it is detection of electrical leakage terminal 1, hand-held
Mobile terminal 2 and host computer 4.
Detection of electrical leakage terminal 1 has several, is hung at each node to be measured respectively.Detection of electrical leakage terminal 1 includes that electric current is mutual
Sensor 101, the first memory module 102 and wirelessly from node module 103, hand-held mobile terminal 2 includes wireless host node module
201, the second memory module 203 and data read port 204.Current transformer 101 detects the electric leakage data at node to be measured simultaneously
Electric leakage data are stored in the first memory module 102, are wirelessly wirelessly sent out the first storage mould from node module 103
The electric leakage data that block 102 stores.Wireless host node module 201 on hand-held mobile terminal 2 receives electric leakage inspection by wireless network
The electric leakage data that terminal 1 issues are surveyed, and are stored in the second memory module 203.Host computer 4 is read by data read port 204
The electric leakage data for taking 2 second memory module 203 of hand-held mobile terminal to store.
Each node to be measured whether can be covered according to wireless network, selection uses a hand-held mobile terminal 2 or multiple hands
Mobile terminal 2 is held to receive the wireless electric leakage data sent from node module 103 of each detection of electrical leakage terminal 1, host computer 4 is logical
The data read port 204 for crossing each hand-held mobile terminal 2 reads data, and by data acquisition system measured by multiple electric leakage nodes
At big data, cloud computing analysis is carried out using measurement result.
The structure of current transformer 101 is identical in the structure with embodiment 1 of current transformer 101 in embodiment 3.
The present invention also provides a kind of electrical leakage detecting methods of earth detector based on embodiment 3, include the following steps：
C1, each detection of electrical leakage terminal is mounted at each node to be measured into power grid, the electric current of each detection of electrical leakage terminal is mutual
Sensor detects the electric leakage data at each node to be measured and data of leaking electricity is stored in the first storage of each detection of electrical leakage terminal respectively
In module；C2, the wireless of each detection of electrical leakage terminal are wirelessly sent out what the first memory module stored from node module
It leaks electricity data, the wireless host node module on hand-held mobile terminal is received each wirelessly from the electric leakage of node sending by wireless network
Electric leakage data are simultaneously stored in the second memory module of hand-held mobile terminal by data；C3, host computer pass through hand-held mobile terminal
On data read port receive the second memory module storage electric leakage data and be analyzed and processed.
In addition to above preferred embodiment, there are other embodiments of the invention, and those skilled in the art can be according to this
Invention makes various changes and modifications, and as long as it does not depart from the spirit of the invention, should belong to appended claims of the present invention and determines
The range of justice.
Claims (9)
1. a kind of earth detector, including detection of electrical leakage terminal and reception terminal, the detection of electrical leakage terminal are mounted to power grid
In node to be measured at, which is characterized in that the detection of electrical leakage terminal include current transformer, the first memory module and wirelessly from
Node module, the current transformer detect the electric leakage data at node to be measured and electric leakage data are stored in first storage
Module, it is described wirelessly wirelessly to send the electric leakage that first memory module stores to the reception terminal from node module
Data.
2. a kind of earth detector according to claim 1, which is characterized in that the reception terminal is hand-held mobile whole
End, the hand-held mobile terminal includes wireless host node module, and the wireless host node module passes through described in wireless network reception
The electric leakage data wirelessly issued from node.
3. a kind of earth detector according to claim 2, which is characterized in that the hand-held mobile terminal is equipped with aobvious
Show the display of electric leakage data.
4. a kind of earth detector according to claim 2, which is characterized in that the detection of electrical leakage terminal has several
A, several detection of electrical leakage terminals mount at each node to be measured into power grid, and the hand-held mobile terminal is equipped with second and deposits
Module and data read port are stored up, the data read port is connected with host computer, and the host computer receives second storage
The electric leakage data of module storage are simultaneously analyzed and processed.
5. a kind of earth detector according to claim 1, which is characterized in that the detection of electrical leakage terminal has several
A, several detection of electrical leakage terminals mount at each node to be measured into power grid, and the reception terminal is concentrator, the collection
Middle device is connected with host computer, and the concentrator receives the electric leakage data of each detection of electrical leakage terminal detection and each node issued and turns
The host computer is issued, the host computer receives the electric leakage data for each node that the concentrator forwarding comes and carries out at analysis
Reason.
6. a kind of earth detector as claimed in any of claims 1 to 5, which is characterized in that the electric current is mutual
Sensor includes openable and closable left iron core and right iron core and the winding being wrapped on the left iron core and right iron core, the left iron core
It is in semi-circular shape with right iron core, the left iron core and right iron core include several spaced short laminations and long lamination,
The end of the short lamination is shorter than the long lamination, and the left iron core and right iron core close up the long iron of rear one of iron core
The short lamination pairing of chip and another iron core.
7. a kind of earth detector according to claim 6, which is characterized in that the current transformer include with it is described
Winding connection active compensation circuit, the active compensation circuit by voltage follower circuit, integrating circuit, amplifying circuit and across
Lead amplifying circuit composition.
8. a kind of earth detector according to claim 6, which is characterized in that be all provided with outside the left iron core and right iron core
There is shielding housing.
9. a kind of electrical leakage detecting method, includes the following steps：
A1, detection of electrical leakage terminal is mounted at the node to be measured into power grid, the detection of the current transformer of detection of electrical leakage terminal to
Electric leakage data and the data that will leak electricity at survey node are stored in the first memory module of detection of electrical leakage terminal；A2, detection of electrical leakage
The wireless electric leakage data that the storage of the first memory module is wirelessly sent out from node module of terminal, hand-held mobile terminal
Wireless host node module by wireless network receive wirelessly from node issue electric leakage data；A3, pass through hand-held mobile terminal
On the electric leakage data that show of display judge whether the node leaks electricity and the size of electrical leakage quantity；
Alternatively, b1, mounting each detection of electrical leakage terminal at each node to be measured into power grid, the electric current of each detection of electrical leakage terminal is mutual
Sensor detects the electric leakage data at each node to be measured and data of leaking electricity is stored in the first storage of each detection of electrical leakage terminal respectively
In module；B2, the wireless of each detection of electrical leakage terminal are wirelessly sent out what the first memory module stored from node module
Electric leakage data, concentrator receive the electric leakage data of each each node wirelessly issued from node module and are transmitted to host computer；B3, on
Position machine receives the electric leakage data for each node that concentrator forwarding comes and is analyzed and processed；
Alternatively, c1, mounting each detection of electrical leakage terminal at each node to be measured into power grid, the electric current of each detection of electrical leakage terminal is mutual
Sensor detects the electric leakage data at each node to be measured and data of leaking electricity is stored in the first storage of each detection of electrical leakage terminal respectively
In module；C2, the wireless of each detection of electrical leakage terminal are wirelessly sent out what the first memory module stored from node module
It leaks electricity data, the wireless host node module on hand-held mobile terminal is received each wirelessly from the electric leakage of node sending by wireless network
Electric leakage data are simultaneously stored in the second memory module of hand-held mobile terminal by data；C3, host computer pass through hand-held mobile terminal
On data read port receive the second memory module storage electric leakage data and be analyzed and processed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109541375A (en) * | 2018-12-20 | 2019-03-29 | 杭州华春科技有限公司 | A kind of earth detector for concentrated gas meter box |
| CN111308266A (en) * | 2019-12-11 | 2020-06-19 | 国网北京市电力公司 | Power transmission line fault detection system and method |
| CN117970010A (en) * | 2024-03-28 | 2024-05-03 | 江苏华鹏智能仪表科技股份有限公司 | Single-channel sampling unit, working method thereof and instrument and meter |
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| CN106226652A (en) * | 2016-08-10 | 2016-12-14 | 国网浙江台州市黄岩区供电公司 | A kind of low-voltage overhead line electric leakage long range positioning detection device |
| CN208239549U (en) * | 2018-05-04 | 2018-12-14 | 国网浙江宁波市奉化区供电有限公司 | A kind of earth detector |
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