CN109541375A - A kind of earth detector for concentrated gas meter box - Google Patents
A kind of earth detector for concentrated gas meter box Download PDFInfo
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- CN109541375A CN109541375A CN201811563958.6A CN201811563958A CN109541375A CN 109541375 A CN109541375 A CN 109541375A CN 201811563958 A CN201811563958 A CN 201811563958A CN 109541375 A CN109541375 A CN 109541375A
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The invention discloses a kind of earth detectors for concentrated gas meter box, including data collector, data concentrator, backstage main website, mobile device and at least one detection of electrical leakage pincers；Data collector detects the electric leakage data of the total input-wire of concentrated gas meter box, and is sent to data concentrator after it is summarized according to the first preset format of system；Each detection of electrical leakage pincers detect the electric leakage data of the outlet of corresponding ammeter, and send it to data concentrator, so that the electric leakage data that data concentrator sends each detection of electrical leakage pincers summarize according to the second preset format of system, and its electric leakage data sent with data collector is uploaded to backstage main website and mobile device；The data concentrator is also used to the electric leakage scheme according to systemic presupposition, and the electric leakage data that comparison detection of electrical leakage pincers and data collector are sent obtain drain conditions, and are uploaded to backstage main website and mobile device.The present invention can flexibly detect the drain conditions of concentrated gas meter box.
Description
Technical field
The present invention relates to detection of electrical leakage technical field more particularly to a kind of earth detectors for concentrated gas meter box.
Background technique
Currently, each branched line and resident resident are generally equipped in the power supply system processed of low pressure 380/220V three-phase four
Earth leakage circuit-breaker.But circuit is pullled due to the older aging of route or privately, it will appear leaky often, earth leakage protective is opened
Often movement tripping is closed, the fault point of leakage current cannot promptly and accurately exclude again, directly influence from household electric；In this way, very much
User will remove earth leakage circuit-breaker, change chopper switch or air switch into, but so lose earth leakage protective
Measure, easily cause life electric shock injures and deaths and fire incident, while when leakage current reaches certain value, will result in upper level
Earth leakage circuit-breaker movement tripping, or even seriously will cause the tripping of transformer secondary main switch, cause large area resident to have a power failure, gives
User power utilization brings inconvenience.
Currently, such as patent of invention CN201510175261.1 discloses a kind of current leakage detection system and method, the system
The drain conditions of single epitope ammeter can conveniently and efficiently be measured.But concentrated gas meter box is mostly used greatly in the net power supply system of city now
Power supply mode is often equipped with 6 to 12 ammeters in one electricity box, in this case, insufficient space is mounted in electricity box, can not
Drain conditions are tested using common current leakage detection system, current clamp or electric leakage split-core type meter etc..City network users electric leakage simultaneously has
Not in rural subscribers, more there are user leakprooves itself, and due to installing concentratedly, the wiring of electricity box zero curve is chaotic or mistake causes to collect
Middle electricity box side branch is protected and family guarantor can not bringing normally into operation.
Summary of the invention
For overcome the deficiencies in the prior art, the invention reside in providing a kind of earth detector for concentrated gas meter box,
It is able to solve problem undetectable for the drain conditions of concentrated gas meter box in the prior art.
The purpose of the present invention adopts the following technical scheme that realization:
A kind of earth detector for concentrated gas meter box, including data collector, data concentrator, backstage main website, shifting
Dynamic equipment and at least one detection of electrical leakage pincers；Wherein, data collector is mounted on the total input-wire of concentrated gas meter box, each electric leakage inspection
Pincers are surveyed to mount in the outlet of the correspondence ammeter in concentrated gas meter box；Data collector, detection of electrical leakage pincers are respectively by data set
Device and backstage master station communication；
Data collector is used to detect the electric leakage data of the total input-wire of concentrated gas meter box, and it is preset according to the first of system
Format is sent to data concentrator after being summarized；Each detection of electrical leakage clamps the electric leakage number for detecting the outlet of corresponding ammeter
According to, and send it to data concentrator；The electric leakage data that data concentrator is used to send each detection of electrical leakage pincers are according to being
Second preset format of system is summarized, and its electric leakage data sent with data collector is uploaded to backstage main website and movement
Equipment；
The data concentrator is also used to the electric leakage scheme according to systemic presupposition, comparison detection of electrical leakage pincers and data collector
The electric leakage data of transmission, obtain the drain conditions of the concentrated gas meter box, and are uploaded to backstage main website and mobile device；
The electric leakage scheme of the systemic presupposition, the historical data according to system operation data are set.
Further, the data collector includes: data acquisition module, the first data processing module and wireless telecommunications mould
Block；Data acquisition module is mounted on the total input-wire of concentrated gas meter box；First data processing module is by the collection of data collecting module collected
The electric leakage data of middle electricity box summarize obtaining summarized results according to the first preset format of system；Wireless communication module is by
One data processing module treated summarized results, is sent to data concentrator.
Further, the data concentrator includes: data reception module, device control module, the second data processing mould
Block and 4G communication module；The data reception module electric leakage data that collector is sent for receiving data are simultaneously sent out by 4G communication module
Give backstage main website；Device control module is used to control the working condition of each detection of electrical leakage pincers, and each detection of electrical leakage is clamped
The electric leakage data of transmission are sent to the second data processing module, so that the second data processing module is pre- according to the second of system
If format, the electric leakage data that corresponding detection of electrical leakage pincers are sent are carried out aggregation process, and after being sent to by 4G communication module
Platform main website.
Further, the second data processing module further includes the electric leakage scheme according to systemic presupposition, by detection of electrical leakage pincers
Electric leakage data and the electric leakage data of data collector compare, and obtain drain conditions and electric leakage conclusion, and communicate by 4G
Module is sent to backstage main website.
Further, the detection of electrical leakage pincers and data concentrator wired connection.
Further, the backstage main website be also used to based on the received external inquiry instructions query to corresponding electric leakage data
And it shows in the form of a list.
Further, the backstage main website is also connect with mobile device, and mobile device is used to send to backstage main website and inquire
Instruction obtains corresponding electric leakage data.
Compared with prior art, the beneficial effects of the present invention are:
The present invention is detected the electric leakage data of concentrated gas meter box by setting data collector, clamps detection by setting detection of electrical leakage
The electric leakage data of each ammeter in concentrated gas meter box, an ammeter can only individually be detected by solving detection of electrical leakage in the prior art
The defect of drain conditions；It solves insufficient space in concentrated gas meter box, leads to that the biggish electric leakage inspection of common volume can not be mounted
The problem of examining system or current clamp test drain conditions；Data concentrator correlation data collector and concentrated gas meter box user electric leakage number
According to can quickly be analyzed and determined to more family concentrated gas meter box drain conditions, and judgement conclusion is uploaded to backstage main website and shifting
Dynamic equipment greatly improves electric leakage investigation efficiency.
Detailed description of the invention
Fig. 1 is the earth detector scheme of installation provided by the present invention for concentrated gas meter box；
Fig. 2 is the module map provided by the present invention for the earth detector of concentrated gas meter box；
Fig. 3 is the display interface of inquiry electric leakage data provided by the invention.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
The invention discloses a kind of earth detectors for concentrated gas meter box, and as depicted in figs. 1 and 2, including data are adopted
Storage, detection of electrical leakage pincers, data concentrator, backstage main website and mobile device.Data collector, detection of electrical leakage pincers respectively with data
Concentrator connection, data concentrator are connect with backstage main website, and backstage main website connects mobile device.
Data concentrator is to the electric leakage data for receiving electric leakage data and detection of electrical leakage pincers transmission that data collector is sent
It compares, analyze, summarize, and send it to backstage main website.
Wherein, detection of electrical leakage pincers are mounted in the user side in concentrated gas meter box, the i.e. inlet wire of ammeter or outlet, utilize detection zero
Sequence electric current principle is used to detect the electric leakage data of user under corresponding ammeter.Due to the ammeter more than one in concentrated gas meter box,
Detection of electrical leakage pincers also not only only one, concentrator port is entered by detection of electrical leakage cramp joint, is corresponded to one by one multiple tested on probation
Family ammeter corresponds to the electric leakage data of user to detect in concentrated gas meter box, and the electric leakage data that will test are sent to data concentrator.
Data collector is mounted in the total input-wire outside concentrated gas meter box, according to zero-sequence current principle detect concentrated gas meter box always into
The electric leakage data of line, no matter concentrated gas meter box is single-phase two wires or three-phase and four-line inlet wire, can be acquired by data collector
Corresponding electric leakage data, and the electric leakage data that will test are sent to data concentrator；Concentrated gas meter box is detected by data collector
Total electric leakage data, and use the electric leakage data that user under ammeter is corresponded in the single detection pincers detection concentrated gas meter box of leakage.
Further, data collector further includes data acquisition module, the first data processing module and wireless communication module.
Data acquisition module is mounted on the total input-wire of concentrated gas meter box, always leaks electricity data for detecting concentrated gas meter box；Data processing module is used
It always leaks electricity after data summarize according to the first preset format in system, leads in the concentrated gas meter box to data collecting module collected
It crosses wireless communication module and is sent to data concentrator.Data acquisition module can be an annular opening mutual inductor, by that will count
It is articulated on the end of incoming cables of concentrated gas meter box according to the acquisition module of collector, utilizes detection zero-sequence current principle detection concentrated gas meter box
Total drain conditions.
Data concentrator includes: data reception module, device control module, the second data processing module and 4G communication mould
Block.
Data reception module: the electric leakage data for the concentrated gas meter box that collector is sent for receiving data, and will be led to by 4G
News module is sent to backstage main website.
Device control module: having multiple ports and clamps electric connection with each detection of electrical leakage respectively, for controlling each leakage
The working condition of electro-detection pincers, and the device control module is also used to the detected ammeter of each detection of electrical leakage pincers to application
The electric leakage data at family are sent to the second data processing module.The device control module can receive external control instruction to control correspondence
Detection of electrical leakage pincers working condition, for example data concentrator has 12 tunnel detection of electrical leakage pincers, and practical tested concentrated gas meter box only has 9
A user, 3 extra at this time concentrator ports have no work, by device control module, such as by setting button switch,
The modes such as inductive switch, touch screen, to control the working condition of corresponding detection of electrical leakage pincers, and then can be by corresponding detection of electrical leakage pincers
Collected electric leakage data are sent to the second data processing module and are handled.It in other words can be flexible by device control module
The working condition for controlling each detection of electrical leakage pincers helps to improve testing efficiency by device control module, summarizes platform area user
Test case summarizes, in order to avoid omit tested user.
Second data processing module: to each detection of electrical leakage clamp the electric leakage data of the user of corresponding ammeter detected according to
Backstage main website and mobile device are sent to by 4G communication module after the second preset format is summarized in system；Second number simultaneously
According to processing module also according to the electric leakage scheme of systemic presupposition, by the electric leakage of the electric leakage data comparison data collector of detection of electrical leakage pincers
Data obtain drain conditions, obtain electric leakage conclusion, be sent to backstage main website and mobile device by 4G communication module.
Electric leakage scheme for the first preset format, the second preset format and systemic presupposition is set in advance by engineering staff
Determine and is stored in system.In actual use, data processing module can select corresponding pre- according to different electric leakage data
If the electric leakage scheme of format and systemic presupposition summarizes electric leakage data, is compared.
In order to be summarized to the electric leakage data detected, comparative analysis processing, the present invention provides following processing
Method that is to say and be respectively provided with corresponding number to equipment such as data concentrator, data collector, detection of electrical leakage pincers, concentrated gas meter boxes,
Corresponding relationship will be established between equipment and equipment by the number of each equipment, and then can realize each equipment institute detection test points
The corresponding relationship of data realizes that number of test points clamps data collector and detection of electrical leakage according to the binding with equipment, and then accurately
The electric leakage data classification detected summarizes with comparative analysis etc..For example pass through the number of data concentrator, the number of concentrated gas meter box
Data concentrator and concentrated gas meter box can be bound, and then can be corresponding with concentrated gas meter box by data concentrator, convenient for distinguishing not
The electric leakage data of same concentrated gas meter box.
Similarly for detection of electrical leakage pincers it is also provided with number, clamps convenient for corresponding detection of electrical leakage and be associated with detected ammeter user
Relationship.In actual use, since the structure of concentrated gas meter box limits, the electric supply meter setting in concentrated gas meter box is mostly 12,
Therefore this programme detection of electrical leakage pincers are set as 12, can measure the electric leakage of the electric supply meter on 12 tunnels in concentrated gas meter box simultaneously in this way
Situation, electric leakage pincers quantity can be not limited only to 12 certainly.Certainly, the quantity of the electric supply meter in concentrated gas meter box is due to according to reality
The demand on border is related, therefore detection of electrical leakage pincers theoretically can be with infinite expanding.User when actual test, in concentrated gas meter box
Ammeter not only only have 12 when, also may be selected 2 or more the earth detectors provided by the present invention for concentrated gas meter box into
It goes while testing.If, can be by preparatory when the electric supply meter in concentrated gas meter box is less than the quantity of detection of electrical leakage pincers when actual test
After binding the corresponding relationship between detection of electrical leakage pincers and ammeter, has binding with corresponding ammeter by device control module control and close
The detection of electrical leakage of system or connection pincers work, then are tested.
Further, the electric leakage for the concentrated gas meter box that the data collector acquires it according to corresponding systemic presupposition format
Data are summarized；And data concentrator clamps electric leakage data detected to detection of electrical leakage according to corresponding systemic presupposition format
Summarized.When summarizing to electric leakage data, also classified by given threshold, for example system is acquired according to setting data
The leakage current that device or data concentrator detect classify to electric leakage: 1, lower than 70mA, being higher than 20mA is general electric leakage；2,
It is important electric leakage higher than 70mA；It 3, is then leakproof lower than 20mA；It 4, can be with according to different zones, the above-mentioned electrical leakage of environmental condition
Adjustment, for example difference, the air humidity in south and northern areas are greater than 85% etc..
Further, data concentrator is also used to the number that will be tested at concentrated gas meter box according to the electric leakage scheme of systemic presupposition
It is compared, analyzes according to the electric leakage data of collector acquisition and the electric leakage data of detection of electrical leakage pincers acquisition, quickly obtain concentration table
The substantially drain conditions of case user, and it is uploaded to backstage main website and mobile device.For example data collector is without electric leakage data, electric leakage
Detection pincers test point has user's electric leakage, there is two kinds of situations at this time: one: being three-phase and four-line at data collector, collection electricity box are with per family
It is single-phase user, be then again split into 2 kinds of situations: 1.1 collection electricity box are belonged to collection electricity box user zero curve and intersected with leaking electricity per family without true
Misconnection, when malfunction elimination, preferential concentrator of checking detects corresponding user's zero curve wiring, does electric leakage without entering in user family and arranges
Reason is investigated and prosecuted, such drain conditions are generally existing in city is netted；1.2 terrifically, and concentrator detects multiple with there is electric leakage per family,
Due to being belonging respectively to different phase lines, in three line four-wire circuits, due to vector sum principle of leaking electricity, cause at data collector
It can not detect electric leakage, such situation belongs to less extreme case.Two: being single-phase two wires at data collector, at this time in full
Electric leakage user has been detected according to concentrator, must be that 2 or more collection electricity box user's zero curves intersection misconnection cause, without entering user
Electric leakage investigation processing is done in family.Electric leakage investigation processing can be rapidly completed in the case, greatly improve electric leakage investigation and place
Manage efficiency.
If data collector has electric leakage data, have following several situations at this time: 1, data concentrator detects concentrated gas meter box 1
Family electric leakage, the feature of data collector electric leakage at this time should be consistent with concentrator, fast verification collection electricity box can leak electricity in turn at this time
Number of users；2, data concentrator detects that 2 family of concentrated gas meter box or more electric leakage feature is consistent, and segment 2 kinds of situations at this time: 2.1 concentrate
Feature of more than 2 family of electricity box leaking electricity unanimously belongs to zero curve misconnection, and collector electric leakage feature is consistent with other families electric leakage feature, at this time
The zero curve misconnection for handling the consistent user of concentrated gas meter box electric leakage feature reenters family and checks the electric leakage of other families；2.2 concentrated gas meter box
Feature of more than 2 families leaking electricity unanimously belongs to zero curve misconnection, and collector electric leakage feature and any other user electric leakage feature are inconsistent, this
When the consistent user of processing concentrated gas meter box electric leakage feature zero curve misconnection, reenter family and check other more families electric leakages；3, data collector
User's electric leakage with data concentrator detection is without any relevance, and collecting electricity box at this time, there are multiple users to leak electricity, and it is right one by one to need
The collection multiple users of electricity box, which register one's residence, does electric leakage investigation, and such situation is less；By foregoing detailed description it is found that data concentrator foundation
Data collector and the data of collection electricity box electric leakage pincers acquisition are compared, and quickly obtain collection electricity box user substantially drain conditions, can
To greatly improve electric leakage investigation efficiency, the less work on the spot time is one of important innovations point of the present invention.
Wherein, the electric leakage scheme of the systemic presupposition in the present invention is also to be obtained by engineering staff according to a large amount of summary of experience
Various drain conditions and corresponding drain conditions, be pre-stored in system, can also be in equipment long-play
And mass data is accumulated, it is then carried out continuing to optimize electric leakage scheme according to the mass data of accumulation, and by prioritization scheme by main website
It is issued to data concentrator to prestore, so that present apparatus electric leakage investigation efficiency steps up, has the function of self-optimization.
Earth detector provided by the invention can be installed in concentrated gas meter box for a long time, real-time monitoring concentrated gas meter box and collection
The leakage condition of user is corresponded in middle electricity box, can be at this time device power supply by alternating current.Since the data of earth detector are adopted
Storage, data concentrator, detection of electrical leakage pincers are all demountable, therefore can also be used for the electric leakage investigation of short time, are adopted at this time
The battery power supply carried with device.
Further, mobile device is connect with backstage main website.Corresponding software is installed on the mobile apparatus, may be implemented to record
The electricity box name and electricity box number and data concentrator for entering concentrated gas meter box establish corresponding relationship；Each detection of electrical leakage pincers can also pass through
Cell phone software individually establishes corresponding relationship with the ammeter user in concentrated gas meter box；Typing mode can by being manually entered, scan stripes
The modes such as code reading.
In addition, data collector can be connect by wireless telecommunications with data concentrator.When attached, data concentrator is automatic
It identifies data collector, and forms data concentrator number+data collector number display number section, illustrate the data collector
Correspond to the data concentrator, acquisition be the corresponding concentrated gas meter box of the data concentrator total input-wire electric leakage data.
The detection of electrical leakage pincers for participating in test are also arranged in the present invention by device control module, and form data concentrator number
The display number section of+detection of electrical leakage pincers number, instruction illustrates the corresponding data concentrator of detection of electrical leakage pincers, and its acquisition is this
The electric leakage data of user are corresponded in the corresponding concentrated gas meter box of data concentrator.
By the operation of above-mentioned binding, the pass of data collector and detection of electrical leakage pincers data summarize, compare, analyzed is formed
System.
Data concentrator carries out processing for the electric leakage data of data collector, detection of electrical leakage pincers detection and summarizes, and passes through column
The form of table stores, such as including electricity box name, electricity box number, user name, user's table number, device number, electrical leakage, electric leakage classification, leakage
Electric situation, electric leakage time started, electric leakage duration etc., wherein name in an account book is the concentrated gas meter box name+use being tested in concentrated gas meter box
Name in an account book, table number are number+electric supply meter table number of concentrated gas meter box, and device number includes data concentrator+data collector number
Code section and data concentrator+detection of electrical leakage pincers number segment.
For example, cell name to be measured are as follows: happy cell；The electricity box name of concentrated gas meter box are as follows: happy Unit 1, cell Building 1；Concentrate table
The electricity box number of case: 00010002；Corresponding user's name in an account book 201,202,203..., table number 99001,99002,99003...；Data
Concentrator number are as follows: 30601；The number of data collector are as follows: 7403, the serial number of detection of electrical leakage pincers is respectively 01-12.
The drain conditions that data summarization is shown, which are shown, to be as follows:
Operator can also be monitored by mobile device and check electric leakage data, as shown in figure 3, be wherein particularly shown
Information can be set according to demand.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (7)
1. a kind of earth detector for concentrated gas meter box, which is characterized in that including data collector, data concentrator, after
Platform main website, mobile device and at least one detection of electrical leakage pincers；Wherein, data collector be mounted on concentrated gas meter box total input-wire,
Each detection of electrical leakage pincers are mounted in the outlet of the correspondence ammeter in concentrated gas meter box；Data collector, detection of electrical leakage pincers lead to respectively
Cross data concentrator and backstage master station communication；
Data collector is used to detect the electric leakage data of the total input-wire of concentrated gas meter box, and by it according to the first preset format of system
Data concentrator is sent to after being summarized；Each detection of electrical leakage clamps the electric leakage data for detecting the outlet of corresponding ammeter, and
Send it to data concentrator；The electric leakage data that data concentrator is used to send each detection of electrical leakage pincers are according to the of system
Two preset formats are summarized, and its electric leakage data sent with data collector is uploaded to backstage main website and mobile device；
The data concentrator is also used to the electric leakage scheme according to systemic presupposition, and comparison detection of electrical leakage pincers and data collector are sent
Electric leakage data, obtain the drain conditions of the concentrated gas meter box, and be uploaded to backstage main website and mobile device；
The electric leakage scheme of the systemic presupposition, the historical data according to system operation data are set.
2. a kind of earth detector for concentrated gas meter box according to claim 1, which is characterized in that the data acquisition
Device includes: data acquisition module, the first data processing module and wireless communication module；Data acquisition module is mounted on concentrated gas meter box
Total input-wire；First data processing module is by the electric leakage data of the concentrated gas meter box of data collecting module collected, according to the of system
One preset format summarize obtaining summarized results；Treated summarizes knot by the first data processing module for wireless communication module
Fruit is sent to data concentrator.
3. a kind of earth detector for concentrated gas meter box according to claim 1, which is characterized in that in the data set
Device includes: data reception module, device control module, the second data processing module and 4G communication module；Data reception module is used
In the electric leakage data for receiving data collector transmission and backstage main website is sent to by 4G communication module；Device control module is used for
The working condition of each detection of electrical leakage pincers is controlled, and the electric leakage data that each detection of electrical leakage pincers are sent are sent at the second data
Module is managed, so that second preset format of second data processing module according to system, clamps corresponding detection of electrical leakage and send
Electric leakage data carry out aggregation process, and backstage main website is sent to by 4G communication module.
4. a kind of earth detector for concentrated gas meter box according to claim 3, which is characterized in that the second data processing
Module further includes the electric leakage scheme according to systemic presupposition, by the electric leakage number of the electric leakage data of detection of electrical leakage pincers and data collector
According to comparing, drain conditions and electric leakage conclusion are obtained, and backstage main website is sent to by 4G communication module.
5. a kind of earth detector for concentrated gas meter box according to claim 1, which is characterized in that the detection of electrical leakage
Pincers and data concentrator wired connection.
6. a kind of earth detector for concentrated gas meter box according to claim 1, which is characterized in that the backstage main website
External inquiry instructions query based on the received is also used to show to corresponding electric leakage data and in the form of a list.
7. a kind of earth detector for concentrated gas meter box according to claim 1, which is characterized in that the backstage main website
It is also connect with mobile device, mobile device, which is used to send inquiry instruction to backstage main website, obtains corresponding electric leakage data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811563958.6A CN109541375A (en) | 2018-12-20 | 2018-12-20 | A kind of earth detector for concentrated gas meter box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811563958.6A CN109541375A (en) | 2018-12-20 | 2018-12-20 | A kind of earth detector for concentrated gas meter box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114285008A (en) * | 2021-12-06 | 2022-04-05 | 国网浙江省电力有限公司台州市路桥区供电公司 | Intelligent electric leakage detection device based on low-voltage distribution network |
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