CN106771814A - A kind of leakage current monitors instruction device - Google Patents
A kind of leakage current monitors instruction device Download PDFInfo
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- CN106771814A CN106771814A CN201611247945.9A CN201611247945A CN106771814A CN 106771814 A CN106771814 A CN 106771814A CN 201611247945 A CN201611247945 A CN 201611247945A CN 106771814 A CN106771814 A CN 106771814A
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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
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention provides a kind of leakage current monitoring instruction device, and leakage current characterization value is collected by collecting device；Being processed according to the leakage current characterization value by low-power microprocessor, electric leakage signal is generated when there are drain conditions；It is last to be identified according to electric leakage signal display electric leakage by display device；And then realize the automatic monitoring of leakage current, it is to avoid a series of problems of prior art Medial ＆ Low Voltage Power Network earth leakage protective device in application process.
Description
Technical field
The present invention relates to leakage current monitoring technical field, more particularly to a kind of leakage current monitoring instruction device.
Background technology
It is well known that low voltage electric network earth leakage protective device is prevent person electric shock, electrical fire and electrical equipment from damaging one
Effective safeguard procedures are planted, power supply enterprise puts into substantial contribution in distribution management and promotes and be mounted with aftercurrent action protecting
Device.But pass through investigation, low voltage electric network earth leakage protective device still suffers from some problems in actual application, such as：
(1) the low voltage electric network earth leakage protective device of end, due to installed in every household, voluntarily being managed by user, therefore, end
Whether is the installation and operation of the low voltage electric network earth leakage protective device at end, and management of power use personnel cannot carry out effective supervision and management.
(2) due to user because oneself consuming device, indoor aging circuit, it is private draw the problems such as disorderly connecing electric leakage, cause end
Low voltage electric network earth leakage protective device frequent movement, user is cannot be in the case of normal electricity consumption, it will usually which end is removed in selection privately
The low voltage electric network earth leakage protective device at end, causes total protector to be bypassed the immediate leadership tripping operation.
(3) according to ruuning situation, low voltage electric network earth leakage protective device is by after longtime running, its part component will be aging
Even damage, cause its performance to change and be above standard, influence sensitivity, such as operation to be leaked up to the low voltage electric network of more than 6 years
Non-electricity protector, part has damaged out of service, but does not change mostly, influences electrical safety.
In addition, earth leakage protective of the management of power use personnel after protection and end protection dismounting is not installed in face of these ends
Workload is very big during trouble shoot；Be typically required a people carries out electrical testing on constantly in total protector side, and another
People carries out test lookup from house to house in user segment with residual current tester, and in face of the area that how wide family is, whole process is non-
It is often cumbersome and time-consuming.And the plenty of time is also required to the walkaround inspection of defective low voltage electric network earth leakage protective device.
The content of the invention
The present invention provides a kind of leakage current monitoring instruction device, to provide a kind of scheme of automatic monitoring leakage current.
To achieve the above object, the technical scheme that the application is provided is as follows：
A kind of leakage current monitors instruction device, including：
Collecting device, for collecting leakage current characterization value；
Low-power microprocessor, for being processed according to the leakage current characterization value, gives birth to when there are drain conditions
Into electric leakage signal；
Display device, for according to electric leakage signal display electric leakage mark.
Preferably, the collecting device includes：
Residual current transformer, for being obtained detecting current value according to primary side leakage current；
Signal conditioning circuit, for according to the detection current value, generating the leakage current characterization value；The electric leakage electricity
Flow table value indicative relation proportional to the primary side current.
Preferably, the low-power microprocessor includes：
Comparator, for comparing the leakage current characterization value and predetermined threshold value, when there are drain conditions, the electric leakage
Electric current characterization value is more than the predetermined threshold value, generates trigger signal；
A/D converter, for according to the trigger signal, the leakage current characterization value being converted into data signal；
Memory, for storing electric leakage signal；The electric leakage signal include the data signal, the trigger signal and its
The generation time.
Preferably, the display device includes：Mechanical instruction equipment and liquid crystal indicator；Wherein：
The mechanical instruction equipment includes：Push-pull electromagnet, spring, sliding bar, touch-switch and reflectorised paint direction board；
The liquid crystal indicator includes：Display screen and button.
Preferably, the low-power microprocessor also includes：
Low-power consumption RF communicators, for sending the electric leakage signal to intelligent terminal.
Preferably, also include：Battery, for being that the low-power microprocessor and the display device are powered.
Preferably, also include：Gate-controlled switch, powers for disconnecting battery according to the trigger signal.
The leakage current monitoring instruction device that the present invention is provided, collects leakage current and characterizes by collecting device
Value；Processed according to the leakage current characterization value by low-power microprocessor, the generation electric leakage when there are drain conditions
Signal；It is last to be identified according to electric leakage signal display electric leakage by display device；And then realize the automatic monitoring of leakage current,
Avoid a series of problems of prior art Medial ＆ Low Voltage Power Network earth leakage protective device in application process.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention or in prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, the accompanying drawing in description is only this below
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation that leakage current provided in an embodiment of the present invention monitors instruction device；
Fig. 2 is the structural representation of the collecting device that another embodiment of the present invention is provided；
Fig. 3 is another structural representation that the leakage current that another embodiment of the present invention is provided monitors instruction device；
Fig. 4 is the structure chart of the mechanical instruction equipment that another embodiment of the present invention is provided；
Fig. 5 is another structure chart of the mechanical instruction equipment that another embodiment of the present invention is provided；
Fig. 6 is another structural representation that the leakage current that another embodiment of the present invention is provided monitors instruction device；
Fig. 7 is another structural representation that the leakage current that another embodiment of the present invention is provided monitors instruction device.
Specific embodiment
To enable the above objects, features and advantages of the present invention more obvious understandable, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
The present invention provides a kind of leakage current monitoring instruction device, to provide a kind of scheme of automatic monitoring leakage current.
Specifically, the leakage current monitoring instruction device, as shown in figure 1, including：The micro- place of collecting device 101, low-power consumption
Reason device 102 and display device 103；Wherein：
The output end of collecting device 101 is connected with the input of low-power microprocessor 102；
The output end of low-power microprocessor 102 is connected with the input of display device 103.
Specifically operation principle is：
Collecting device 101 is used to collect leakage current characterization value；
Low-power microprocessor 102 is used to be processed according to the leakage current characterization value, when there are drain conditions
Generation electric leakage signal；
Display device 103 is used for according to electric leakage signal display electric leakage mark.
The present embodiment provide the leakage current monitoring instruction device, by monitor incessantly leakage current size and
The sign of leakage current status data is given, the automatic monitoring of leakage current is realized, and simplifies installation process, carried
High accuracy, also can clearly find place of leaking electricity, it is to avoid prior art Medial ＆ Low Voltage Power Network earth leakage protective device is in application process
In a series of problems.
Another embodiment of the present invention additionally provides a kind of specific leakage current monitoring instruction device, as shown in figure 1, bag
Include：Collecting device 101, low-power microprocessor 102 and display device 103；Wherein：
The output end of collecting device 101 is connected with the input of low-power microprocessor 102；
The output end of low-power microprocessor 102 is connected with the input of display device 103.
Collecting device 101 is used to collect leakage current characterization value；
Low-power microprocessor 102 is used to be processed according to the leakage current characterization value, when there are drain conditions
Generation electric leakage signal；
Display device 103 is used for according to electric leakage signal display electric leakage mark.
Preferably, referring to Fig. 2, collecting device 101 includes：Residual current transformer 201 and signal conditioning circuit 202；Its
In：
Residual current transformer 201 is used to be obtained detecting current value according to primary side leakage current；
Signal conditioning circuit 202 is used to, according to the detection current value, generate the leakage current characterization value；The electric leakage
Electric current characterization value relation proportional to the primary side current.
Collecting device 101 mainly includes open-close type leakage current transformer 201 and current regulating circuit 202, by folding
Formula leakage current transformer 201 induces the size of primary side leakage current, by the current regulating circuit 202 being made up of amplifier
UA level currents are amplified the voltage signal (leakage current characterization value) that be transformed into and can be used by low-power microprocessor 102, should
Voltage signal size proportional to the primary side leakage current of residual current transformer 201.
This gives the form that implements of collecting device in Fig. 1 101, but it is not necessarily limited to Fig. 2 institutes
The form shown, Fig. 2 is only a kind of example, can be configured depending on its concrete application environment, and can collect can be micro- by low-power consumption
The scheme of the voltage signal (leakage current characterization value) that processor 102 is used is in the protection domain of the application.
Another embodiment of the present invention additionally provides a kind of specific leakage current monitoring instruction device, as shown in figure 1, bag
Include：Collecting device 101, low-power microprocessor 102 and display device 103；Wherein：
The output end of collecting device 101 is connected with the input of low-power microprocessor 102；
The output end of low-power microprocessor 102 is connected with the input of display device 103.
Collecting device 101 is used to collect leakage current characterization value；
Low-power microprocessor 102 is used to be processed according to the leakage current characterization value, when there are drain conditions
Generation electric leakage signal；
Display device 103 is used for according to electric leakage signal display electric leakage mark.
Preferably, referring to Fig. 3, low-power microprocessor 102 includes：Comparator 301, A/D converter 302 and memory
303；Wherein：
Comparator 301 is used to compare the leakage current characterization value and predetermined threshold value, when there are drain conditions, the leakage
Electric current characterization value is more than the predetermined threshold value, generates trigger signal；
A/D converter 302 is used for according to the trigger signal, and the leakage current characterization value is converted into data signal；
Memory 303 is used to store electric leakage signal；The electric leakage signal include the data signal, the trigger signal and
Its generation time.
Leakage current characterization value (voltage signal) that collecting device 101 is collected and predetermined threshold value (voltage of adjusting) through than
Compare compared with device 301, export trigger signal to A/D converter 302 and display device 103.A/D converter 302 is according to the triggering
Signal, data signal is converted to by the leakage current characterization value, and memory 303 stores the data signal, triggering letter
Number and its generation the time.Display device 103 receives the data signal, the trigger signal and its generation time, and then is able to
It has been shown that, for the development of follow-up power-off protection work.
This gives the form that implements of low-power microprocessor in Fig. 1 102, but it is not necessarily limited to
Form shown in Fig. 3, Fig. 3 is only a kind of example, can be configured depending on its concrete application environment, can be according to the electric leakage electricity
Flow table value indicative is processed, and when there are drain conditions, the scheme of generation electric leakage signal is in the protection domain of the application.
Another embodiment of the present invention additionally provides a kind of specific leakage current monitoring instruction device, as shown in figure 1, bag
Include：Collecting device 101, low-power microprocessor 102 and display device 103；Wherein：
The output end of collecting device 101 is connected with the input of low-power microprocessor 102；
The output end of low-power microprocessor 102 is connected with the input of display device 103.
Collecting device 101 is used to collect leakage current characterization value；
Low-power microprocessor 102 is used to be processed according to the leakage current characterization value, when there are drain conditions
Generation electric leakage signal；
Display device 103 is used for according to electric leakage signal display electric leakage mark.
Preferably, display device 103 includes：Mechanical instruction equipment and liquid crystal indicator；Wherein：
The mechanical instruction equipment, including：Push-pull electromagnet, spring, sliding bar, touch-switch and reflectorised paint are indicated
Board；Its running is as follows：
Referring to Fig. 4, in normal state, push-pull electromagnet is in open-circuit condition, and left side spring stretches.
When low-power microprocessor 102 detects abnormal current, referring to Fig. 5, the trigger signal in the electric leakage signal
Push-pull electromagnet loop will be closed, circuit closed, work of electromagnet will produce meeting suction, because sliding bar is designed with two
Block, suction post-tensioning, compression left side spring, because upside spring pressure glides, sliding bar falls downside block, because right is light
Touch switch and electromagnet power supply circuit is disconnected when sliding bar drops, electromagnet does not work, suction is released, left side spring again slide by pressure
Lever, until upper gear is stopped.The formula that now drops reflectorised paint direction board drops, and direction board has at transverse projections and keeps off when falling down
Firmly, the side for scribbling reflectorised paint is exposed outside, is clearly checked in user of service very much.
When staff find drop formula reflectorised paint direction board electric leakage point out when, investigation solution is carried out to the region electricity consumption
Problem, then pushes up the formula reflectorised paint direction board that drops, and direction board is recovered in housing, and the leakage current monitoring indicates dress
Put recovery use state.
The liquid crystal indicator includes：Display screen and button.Mainly realize following functions：
(1), the out-of-limit time of origin of display screen display electric leakage；
(2) leakage current size in limited time is got in, display screen display electric leakage；
(3), display screen shows the historical data of homogeneous data；
(4), button has and checks and page-turning function.
This gives the form that implements of display device in Fig. 1 103, but it is not necessarily limited to this implementation
Two kinds of ways of realization described in example, only a kind of example, can be configured depending on its concrete application environment herein, can be according to institute
Stating electric leakage signal shows the scheme of electric leakage mark in the protection domain of the application.
Another embodiment of the present invention additionally provides a kind of specific leakage current monitoring instruction device, as shown in figure 1, bag
Include：Collecting device 101, low-power microprocessor 102 and display device 103；Wherein：
The output end of collecting device 101 is connected with the input of low-power microprocessor 102；
The output end of low-power microprocessor 102 is connected with the input of display device 103.
Collecting device 101 is used to collect leakage current characterization value；
Low-power microprocessor 102 is used to be processed according to the leakage current characterization value, when there are drain conditions
Generation electric leakage signal；
Display device 103 is used for according to electric leakage signal display electric leakage mark.
Preferably, referring to Fig. 2, collecting device 101 includes：Residual current transformer 201 and signal conditioning circuit 202；Its
In：
Residual current transformer 201 is used to be obtained detecting current value according to primary side leakage current；
Signal conditioning circuit 202 is used to, according to the detection current value, generate the leakage current characterization value；The electric leakage
Electric current characterization value relation proportional to the primary side current.
Preferably, referring to Fig. 6, low-power microprocessor 102 includes：
Comparator 301, A/D converter 302, memory 303 and low-power consumption RF communication 304；Wherein：
Comparator 301 is used to compare the leakage current characterization value and predetermined threshold value, when there are drain conditions, the leakage
Electric current characterization value is more than the predetermined threshold value, generates trigger signal；
A/D converter 302 is used for according to the trigger signal, and the leakage current characterization value is converted into data signal；
Memory 303 is used to store electric leakage signal；The electric leakage signal include the data signal, the trigger signal and
Its generation time.
Low-power consumption RF communicators 304 are used to send the electric leakage signal to intelligent terminal.
Preferably, display device 103 includes：Mechanical instruction equipment and liquid crystal indicator；Wherein：
The mechanical instruction equipment, including：Push-pull electromagnet, spring, sliding bar, touch-switch and reflectorised paint are indicated
Board.
The liquid crystal indicator includes：Display screen and button.
301 pairs of voltage signals for amplifying conversion via signal conditioning circuit 202 of comparator judge；When detecting and remain
The leakage current characterization value (voltage signal) of the proportional size of primary side leakage current of aftercurrent transformer 201 exceedes predetermined threshold value,
Comparator 301 generates trigger signal, and triggering A/D converter 302 works, and the data of collection pass through time delay, filtering, become at scaling method
After reason, correct judgement is made.Low-power microprocessor 102 exports trigger signal, and the sign of display device 103 will be notable
Expression leakage current already exceed respective threshold.
After leakage current exceedes given threshold, low-power microprocessor 102 stores the time of electric leakage size and its generation,
The historical data that electric leakage occurs can be checked on the display screen of liquid crystal indicator by using button.
And other smart machines can monitor instruction device and communicate by low-power consumption RF communicators 304 and the leakage current,
Completion checks historical data, sets modification and the work for updating；So that the operation of related personnel is more facilitated.
Another kind this gives display device in Fig. 1 103 implements form, but is not necessarily limited to
Three kinds of ways of realization described in the present embodiment and a upper embodiment, three is a kind of example, can regard its concrete application environment
It is configured, can be according to the scheme of electric leakage signal display electric leakage mark in the protection domain of the application.
Another embodiment of the present invention additionally provides a kind of specific leakage current monitoring instruction device, as shown in fig. 7, bag
Include：Collecting device 101, low-power microprocessor 102, display device 103, battery 104 and gate-controlled switch 105；Wherein：
The output end of collecting device 101 is connected with the input of low-power microprocessor 102；
The output end of low-power microprocessor 102 respectively with the control of the input and gate-controlled switch 105 of display device 103
End is connected；
The input connection battery 104 of gate-controlled switch 105, the output end connection low-power microprocessor of gate-controlled switch 105
102 and the feeder ear of display device 103.
Collecting device 101 is used to collect leakage current characterization value；
Low-power microprocessor 102 is used to be processed according to the leakage current characterization value, when there are drain conditions
Generation electric leakage signal；
Display device 103 is used for according to electric leakage signal display electric leakage mark；
Battery 104 is used to be that low-power microprocessor 102 and display device 103 are powered；
Gate-controlled switch 105 is used to be powered according to trigger signal disconnection battery 104.
Leakage current monitoring instruction device described in the present embodiment is self-powered, it is to avoid tripping and upper electricity that phase shortage causes
The malfunction of impact.
After display device 103 receives trigger signal, obvious electric leakage mark is provided, while gate-controlled switch 105 is received
The trigger signal, disconnects the power supply (battery 104) that the leakage current monitors instruction device itself.Staff is to drain conditions
After being processed, by the sign that resets, now, the leakage current monitoring instruction device will devote oneself to work again.
Specific operation principle is same as the previously described embodiments, no longer repeats one by one herein.
Each embodiment is described by the way of progressive in the present invention, and what each embodiment was stressed is and other realities
Apply the difference of example, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
Speech, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method part illustration
.
The above, is only presently preferred embodiments of the present invention, and any formal limitation is not made to the present invention.Though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, in the case where technical solution of the present invention ambit is not departed from, all using the methods and techniques content of the disclosure above to the present invention
Technical scheme makes many possible variations and modification, or the Equivalent embodiments for being revised as equivalent variations.Therefore, it is every without departing from
The content of technical solution of the present invention, according to technical spirit of the invention to any simple modification made for any of the above embodiments, equivalent
Change and modification, still fall within the range of technical solution of the present invention protection.
Claims (7)
1. a kind of leakage current monitors instruction device, it is characterised in that including：
Collecting device, for collecting leakage current characterization value；
Low-power microprocessor, for being processed according to the leakage current characterization value, the generation leakage when there are drain conditions
Electric signal；
Display device, for according to electric leakage signal display electric leakage mark.
2. leakage current according to claim 1 monitors instruction device, it is characterised in that the collecting device includes：
Residual current transformer, for being obtained detecting current value according to primary side leakage current；
Signal conditioning circuit, for according to the detection current value, generating the leakage current characterization value；The leakage current table
Value indicative relation proportional to the primary side current.
3. leakage current according to claim 1 monitors instruction device, it is characterised in that the low-power microprocessor bag
Include：
Comparator, for comparing the leakage current characterization value and predetermined threshold value, when there are drain conditions, the leakage current
Characterization value is more than the predetermined threshold value, generates trigger signal；
A/D converter, for according to the trigger signal, the leakage current characterization value being converted into data signal；
Memory, for storing electric leakage signal；The electric leakage signal includes the data signal, the trigger signal and its generation
Time.
4. leakage current according to claim 3 monitors instruction device, it is characterised in that the display device includes：Machine
Tool instruction equipment and liquid crystal indicator；Wherein：
The mechanical instruction equipment includes：Push-pull electromagnet, spring, sliding bar, touch-switch and reflectorised paint direction board；
The liquid crystal indicator includes：Display screen and button.
5. leakage current according to claim 3 monitors instruction device, it is characterised in that the low-power microprocessor is also
Including：
Low-power consumption RF communicators, for sending the electric leakage signal to intelligent terminal.
6. leakage current according to claim 3 monitors instruction device, it is characterised in that also include：Battery, for being institute
State low-power microprocessor and the display device is powered.
7. leakage current according to claim 6 monitors instruction device, it is characterised in that also include：Gate-controlled switch, is used for
Battery is disconnected according to the trigger signal to power.
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| CN201611247945.9A CN106771814A (en) | 2016-12-29 | 2016-12-29 | A kind of leakage current monitors instruction device |
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| CN201611247945.9A CN106771814A (en) | 2016-12-29 | 2016-12-29 | A kind of leakage current monitors instruction device |
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| CN108459248A (en) * | 2018-04-02 | 2018-08-28 | 广东电网有限责任公司 | A kind of transmission line of electricity device for detecting corona discharge |
| CN108931687A (en) * | 2018-04-27 | 2018-12-04 | 东南大学 | Household electric leakage real-time monitoring system based on Bluetooth communication |
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| CN205027810U (en) * | 2015-09-23 | 2016-02-10 | 临安亿安电力电子科技有限公司 | Leak current monitoring device |
| CN105301432A (en) * | 2015-11-26 | 2016-02-03 | 国网山东省电力公司济南供电公司 | Electric power equipment insulation leakage current on-line monitoring circuit |
| CN205608076U (en) * | 2016-03-14 | 2016-09-28 | 中国南方电网有限责任公司超高压输电公司梧州局 | Current transformer leakage current on -line monitoring system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108459248A (en) * | 2018-04-02 | 2018-08-28 | 广东电网有限责任公司 | A kind of transmission line of electricity device for detecting corona discharge |
| CN108931687A (en) * | 2018-04-27 | 2018-12-04 | 东南大学 | Household electric leakage real-time monitoring system based on Bluetooth communication |
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Application publication date: 20170531 |