CN207557329U - The intermittent electric leakage alarm device of resident - Google Patents
The intermittent electric leakage alarm device of resident Download PDFInfo
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- CN207557329U CN207557329U CN201721535281.6U CN201721535281U CN207557329U CN 207557329 U CN207557329 U CN 207557329U CN 201721535281 U CN201721535281 U CN 201721535281U CN 207557329 U CN207557329 U CN 207557329U
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- resistance
- display screen
- mcu units
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Abstract
The utility model discloses the intermittent electric leakage alarm devices of resident,Including leakage current transformer,Sample processing unit,MCU units,Push-button unit,Buzzer,Buzzer driving unit,Display screen,Display screen driving unit,ISP interfaces and power supply,The input terminal of the leakage current transformer and sample processing unit connects,The output terminal of the sample processing unit is connect with MCU units,The push-button unit is connect with MCU units,The input terminal of the buzzer driving unit is connect with MCU units,The buzzer is connect with the output terminal of buzzer driving unit,The input terminal of the display screen driving unit is connect with MCU units,The display screen is connect with the output terminal of display screen driving unit,The ISP interfaces are connect with MCU units,The power supply and sample processing unit,MCU units,Push-button unit,Display screen driving unit,ISP interfaces are connected and are powered,This device is used to detect leakage current and alarm.
Description
Technical field
The utility model is related to technical field of electric power detection more particularly to a kind of detection of electrical leakage of residential electricity consumption alarm dresses
It puts, can store and show leakage data.
Background technology
Two-stage earth leakage protective is generally used in the distribution system of rural area at present：Total electric leakage is installed in distribution transformer to protect
Protection unit；Device is failed to report in installing in resident family.Device is failed to report when leakage current is more than 30mA in resident family, direct action；Work as residence
In home when failing to report device failure, residential households leakage current be more than 30mA when, fail to report device be failure to actuate or when single household family leak electricity
Stream is less than 30mA, which will be added at total earth leakage protective device, in this way once being sent out at total earth leakage protective device
During raw intermittent leakage tripping, other users under circuit can be caused frequently to have a power failure, trouble point not easy-to-search.
Utility model content
The technical problems to be solved in the utility model is：Device is failed to report when leakage current is more than 30mA in resident family, directly
Action；When in resident family when failing to report device failure, when residential households leakage current is more than 30mA, failing to report device and be failure to actuate or when single
Family family leakage current is less than 30mA, which will be added at total earth leakage protective device, in this way once being protected in total electric leakage
When intermittent leakage tripping occurring at protection unit, other users under circuit can be caused frequently to have a power failure, trouble point not easy-to-search.
In order to solve problem above, the specific technical solution that the utility model is taken is：The intermittent leakage-current alarm dress of resident
It puts, including leakage current transformer, sample processing unit, MCU units, push-button unit, buzzer, buzzer driving unit, shows
The input terminal of display screen, display screen driving unit, ISP interfaces and power supply, the leakage current transformer and sample processing unit connects
It connects, the output terminal of the sample processing unit is connect with MCU units, and the push-button unit is connect with MCU units, the buzzer
The input terminal of driving unit is connect with MCU units, and the buzzer is connect with the output terminal of buzzer driving unit, the display
The input terminal of screen driving unit is connect with MCU units, and the display screen is connect with the output terminal of display screen driving unit, described
ISP interfaces are connect with MCU units, the power supply and sample processing unit, MCU units, push-button unit, display screen driving unit,
ISP interfaces are connected and are powered.
Further, the sample processing unit uses model ATT7053 single-phase measurement chips, and the leakage current is mutual
Sensor is connect after being concatenated a difference channel with the differential input signal end of model ATT7053 single-phase measurement chips.
Further, the difference channel includes resistance R30, resistance R31, resistance R32, filter capacitor C30 and filtered electrical
Hold C31, the both ends of the resistance R30 and the output terminal of leakage current transformer connect, one end of the resistance R30 and resistance
One end connection of R31, the other end of the resistance R31 and one end of filter capacitor C31, model ATT7053 single-phase measurement cores
The differential input signal termination of piece, the other end ground connection of the filter capacitor C31, the other end and resistance of the resistance R30
One end connection of R32, the other end of the resistance R32 and one end of filter capacitor C30, model ATT7053 single-phase measurement cores
Another differential input signal termination of piece, the other end ground connection of the filter capacitor C30.
Further, the leakage current transformer uses open type leakage current transformer.
Further, the MCU units use microcontroller minimum work system.
Further, the buzzer driving unit uses triode, and the base stage of the triode is connect with MCU units,
The emitter-base bandgap grading of the triode is connect with power supply, and the collector of the triode is connect with buzzer.
Further, the display screen uses liquid crystal display.
Further, the display screen driving unit uses liquid crystal display driving chip.
Compared with prior art, the beneficial effects of the utility model are：This device is easy for installation, without power failure operation, tool
There is writing function, the leakage current numerical value of trouble point generation can be recorded automatically, and record can be thumbed, there is warning function, can position
Rural electricity consumption security risk to improving power supply reliability, is reduced, reducing line loss etc. has positive effect, reduces in trouble point
Power supply enterprise's human and material resources, it is contemplated that 200,000 yuan of economic benefit.
Description of the drawings
Fig. 1 show the module frame chart of the utility model.
Fig. 2 show the circuit diagram of the sample processing unit in the utility model.
Fig. 3 show being connect by MCU units, buzzer driving unit, buzzer, push-button unit, ISP in the utility model
The warning circuit figure of mouth and power supply composition.
Fig. 4 show the circuit diagram of the display screen and display screen driving unit in the utility model.
Specific embodiment
Content to make the utility model is clearer, below in conjunction with the accompanying drawings, to specific embodiment of the present utility model
It is described in further detail.It should be noted that it for purposes of clarity, is omitted in attached drawing and explanation unrelated with the utility model
, the expression and description of component known to persons of ordinary skill in the art.
With reference to figure 1, the intermittent electric leakage alarm device of resident is mono- including leakage current transformer, sample processing unit, MCU
Member, push-button unit, buzzer, buzzer driving unit, display screen, display screen driving unit, ISP interfaces and power supply, the leakage
The input terminal of electric current transformer and sample processing unit connects, and the output terminal of the sample processing unit is connect with MCU units,
The push-button unit is connect with MCU units, and the input terminal of the buzzer driving unit is connect with MCU units, the buzzer
It is connect with the output terminal of buzzer driving unit, the input terminal of the display screen driving unit is connect with MCU units, the display
Screen is connect with the output terminal of display screen driving unit, and the ISP interfaces are connect with MCU units, the power supply and sampling processing list
Member, the connection of MCU units, push-button unit, display screen driving unit, ISP interfaces and power supply.
With reference to Fig. 2, the sample processing unit uses model ATT7053 single-phase measurement chips, and model ATT7053 is mono-
Phase computation chip includes 22 Sigma_Delta ADC, and differential input signal supports 5000:1 dynamic range, full speed running
When power consumption<4.5mA, small power consumption, precision is high, and it is single-phase that crystal oscillator chip Y2, capacitance C21 and capacitance C22 constitute model ATT7053
The crystal oscillating circuit of computation chip, power supply is by capacitance C20 filtering and the power supply of model ATT7053 single-phase measurement chips.It is described
Leakage current transformer is concatenated the differential input signal end company with model ATT7053 single-phase measurement chips after a difference channel
It connects, it is preferable that the difference channel includes resistance R30, resistance R31, resistance R32, filter capacitor C30 and filter capacitor C31, institute
The both ends for stating resistance R30 are connect with the output terminal of leakage current transformer CT1, one end of the resistance R30 and the one of resistance R31
End connection, the other end of the resistance R31 and one end of filter capacitor C31, model ATT7053 single-phase measurement chips it is one poor
Divide input signal termination, the other end ground connection of the filter capacitor C31, the other end of the resistance R30 and one end of resistance R32
Connection, the other end of the resistance R32 and one end of filter capacitor C30, another difference of model ATT7053 single-phase measurement chips
Divide the connection of input signal end, the other end ground connection of the filter capacitor C30, this difference channel structure is simple, and has to signal
Filter action improves signal acquisition precision.
Consider that service-wire is generally closed installation, from house lead in thread casing, to ammeter box, then to outgoing line part, do not have
There is any exposed connector, if using closed loop mutual inductor, it is necessary to open ammeter box, disconnect house lead in and ammeter box connecting portion
Point, by closed loop mutual inductor be sleeved on house lead in just can, it is laborious that this is time consuming.Therefore, the leakage current transformer CT1 is adopted
With open type leakage current transformer, leakage current transformer is also referred to as zero sequence current mutual inductor, in the house lead in that needs measure
On, directly open type mutual inductor is stuck on house lead in casing, easy for installation, plug and play, dismounting is also very simple.
The creepage mutual inductor employs the leakage current transformer of 1A/0.5mA, and turn ratio reaches 2000:1, precision is high,
Good linearity, open type are easy for installation.
With reference to figure 3, the MCU units use microcontroller minimum work system, it is preferred that the microcontroller minimum job family
For system using STC15F2K32S2 microcontrollers, crystal oscillator chip Y1, capacitance C11 and capacitance C12 constitute model STC15F2K32S2
The external crystal oscillation circuit of microcontroller.STC15F2K32S2 microcontrollers high speed/highly reliable/low-power consumption/superpower anti-interference, is internally integrated
The EEPROM of high-precision R/C clocks, built-in 2K bytes large capacity SRAM and large capacity can be used to preserve the electric leakage electricity of setting
It flows limit value and maximum leakage current numerical value, power down is not lost, it is notable that MCU units are unlimited in this present embodiment
Microcontroller model.
Preferably, the buzzer driving unit is connected using the base stage of triode Q2, the triode Q1 with MCU units
It connecing, the emitter-base bandgap grading of the triode Q2 is connect with power supply, and the collector of the triode Q2 is connect with buzzer U2, this is simple in structure,
It is at low cost, of course, buzzer driving unit can also multiple triodes composition driving unit, such as Darlington crystalline substance battle array pipe.
Buzzer driving unit is not limited to the embodiment of the utility model.
The push-button unit includes resistance R81, resistance R82, button SW1 and button SW2, the resistance R81 and resistance R82
One end be connected to power supply jointly, the resistance R81 other ends are connect respectively with MCU units, button SW1, the other end of resistance R82 difference
It is connect with MCU units, button SW1, button SW1 and button SW2 ground connection, two buttons built in key-press module（Button SW1 and button
SW2）, a button is for arrange parameter, and to set the leakage current upper limit value of alarm, another button is used for inquiring
In inquiry electric leakage data maximums.ISP interfaces are the prior art, can simplify system cost with online programming.Power supply uses electric power storage
Pond or lithium battery, the power supply are mono- to sample processing unit, MCU again after electrolytic capacitor C13 and capacitance C12 filtering voltage regulations
Member, push-button unit, display screen driving unit, the power supply of ISP interfaces.
With reference to figure 4, the display screen uses liquid crystal display, and the display screen driving unit uses liquid crystal display driving chip, liquid
The preferred model of crystalline substance screen is LCD019, this liquid crystal display low-power consumption, high-resolution are right therewith for showing current leakage current numerical value
Ying Di, the preferred model of liquid crystal display driving chip is HT1621, which can drive the liquid crystal display of model LCD019.
Operation principle：Directly open type leakage current transformer is sleeved on house lead in casing, leakage current transformer output
Sample rate current flows through resistance R30, is converted into sampled voltage, and resistance R31 and filter capacitor C31 form a difference branch, be used for
One for being filtered to the voltage signal of resistance R30 one end and inputting a signal into model ATT7053 single-phase measurement chips is poor
Divide input signal end, resistance R32 and filter capacitor C30 form another difference branch, for believing another terminal voltages of resistance R30
Number it is filtered and inputs a signal into another differential input signal end of model ATT7053 single-phase measurement chips, model
Two paths of signals is handled ATT7053 single-phase measurement chips and calculus of differences, obtains being proportional to the sampled voltage of leakage current,
And leakage current is calculated, STC15F2K32S2 microcontrollers are input to, STC15F2K32S2 microcontrollers obtain leakage current simultaneously certainly
Dynamic to be recorded in the nonvolatile memory of itself, power down is not lost, and with the leakage current preset value of the alarm of setting into
Row comparison, when the leakage current of actual measurement is more than preset value, STC15F2K32S2 microcontrollers give buzzer driving unit, i.e. three poles
The base stage of pipe Q2 sends high level instruction, triode Q2 conductings, buzzer U2 alarms, is leaked using the button history maximum that can leaf through
Electric current values, with this positioning failure user, after troubleshooting, also keys available resets record, is successfully realized and resident is used
The detection of leakage current and indicating fault are installed without having a power failure, and can quickly search and locate electric leakage user, and it is reliable to improve power supply
Property, it improves customer satisfaction.
Only express the embodiment of the utility model above, description is more specific and in detail, but can not therefore and
It is interpreted as the limitation to utility model patent range.It should be pointed out that for those of ordinary skill in the art, not
Under the premise of being detached from the utility model design, various modifications and improvements can be made, these belong to the guarantor of the utility model
Protect range.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (8)
1. the intermittent electric leakage alarm device of resident, which is characterized in that mono- including leakage current transformer, sample processing unit, MCU
Member, push-button unit, buzzer, buzzer driving unit, display screen, display screen driving unit, ISP interfaces and power supply, the leakage
The input terminal of electric current transformer and sample processing unit connects, and the output terminal of the sample processing unit is connect with MCU units,
The push-button unit is connect with MCU units, and the input terminal of the buzzer driving unit is connect with MCU units, the buzzer
It is connect with the output terminal of buzzer driving unit, the input terminal of the display screen driving unit is connect with MCU units, the display
Screen is connect with the output terminal of display screen driving unit, and the ISP interfaces are connect with MCU units, the power supply and sampling processing list
Member, the connection of MCU units, push-button unit, display screen driving unit, ISP interfaces and power supply.
2. the intermittent electric leakage alarm device of resident as described in claim 1, which is characterized in that the sample processing unit uses
Model ATT7053 single-phase measurement chips, the leakage current transformer are concatenated after a difference channel and model ATT7053
The differential input signal end connection of single-phase measurement chip.
3. the intermittent electric leakage alarm device of resident as claimed in claim 2, which is characterized in that the difference channel includes resistance
R30, resistance R31, resistance R32, filter capacitor C30 and the both ends of filter capacitor C31, the resistance R30 and leakage current mutual inductance
The output terminal connection of device, one end of the resistance R30 are connect with one end of resistance R31, the other end of the resistance R31 and filtering
One end of capacitance C31, the differential input signal termination of model ATT7053 single-phase measurement chips, the filter capacitor C31's
The other end is grounded, and the other end of the resistance R30 is connect with one end of resistance R32, the other end and filtered electrical of the resistance R32
Hold one end of C30, another differential input signal termination of model ATT7053 single-phase measurement chips, the filter capacitor C30's
The other end is grounded.
4. the intermittent electric leakage alarm device of resident as described in claim 1, which is characterized in that the leakage current transformer is adopted
With open type leakage current transformer.
5. the intermittent electric leakage alarm device of resident as described in claim 1, which is characterized in that the MCU units use monolithic
Machine minimum work system.
6. the intermittent electric leakage alarm device of resident as described in claim 1, which is characterized in that the buzzer driving unit is adopted
With triode, the base stage of the triode is connect with MCU units, and the emitter-base bandgap grading of the triode is connect with power supply, the triode
Collector connect with buzzer.
7. the intermittent electric leakage alarm device of resident as described in claim 1, which is characterized in that the display screen uses liquid crystal
Screen.
8. the intermittent electric leakage alarm device of resident as described in claim 1, which is characterized in that the display screen driving unit is adopted
With liquid crystal display driving chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721535281.6U CN207557329U (en) | 2017-11-15 | 2017-11-15 | The intermittent electric leakage alarm device of resident |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721535281.6U CN207557329U (en) | 2017-11-15 | 2017-11-15 | The intermittent electric leakage alarm device of resident |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207557329U true CN207557329U (en) | 2018-06-29 |
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ID=62679094
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721535281.6U Active CN207557329U (en) | 2017-11-15 | 2017-11-15 | The intermittent electric leakage alarm device of resident |
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| CN (1) | CN207557329U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727909A (en) * | 2017-11-15 | 2018-02-23 | 国网江苏省电力公司南京供电公司 | Resident's batch (-type) electric leakage alarm device |
-
2017
- 2017-11-15 CN CN201721535281.6U patent/CN207557329U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727909A (en) * | 2017-11-15 | 2018-02-23 | 国网江苏省电力公司南京供电公司 | Resident's batch (-type) electric leakage alarm device |
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