CN208043931U - The metering electric energy meter of anti-lost zero curve - Google Patents
The metering electric energy meter of anti-lost zero curve Download PDFInfo
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- CN208043931U CN208043931U CN201820680179.3U CN201820680179U CN208043931U CN 208043931 U CN208043931 U CN 208043931U CN 201820680179 U CN201820680179 U CN 201820680179U CN 208043931 U CN208043931 U CN 208043931U
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Abstract
Include power sensing circuit the utility model is related to one kind, reduction voltage circuit, first rectification circuit, second current rectifying and wave filtering circuit, third filter circuit, power supply selection circuit, stand-by power supply circuit, regulator circuit, the power sensing circuit connection firewire L, the input terminal of reduction voltage circuit is separately connected firewire L and zero curve N, the output end of power sensing circuit connects the input terminal of the first rectification circuit, the output end of reduction voltage circuit connects the input terminal of the second current rectifying and wave filtering circuit, the output end of the output end of first rectification circuit and the second current rectifying and wave filtering circuit is separately connected the input terminal of third filter circuit, the input terminal of the output end connection power supply selection circuit of third filter circuit, the input terminal of the output end connection power supply selection circuit of stand-by power supply circuit, the input terminal of the output end connection regulator circuit of power supply selection circuit.The circuit of the metering electric energy meter of the anti-lost zero curve of this practicality connects simple, the operation is stable, and electric energy meter can be kept to be in normal operating conditions.
Description
Technical field
The utility model is related to a kind of electric energy meter more particularly to a kind of metering electric energy meters of anti-lost zero curve.
Background technology
Electric energy meter is the instrument for measuring electric energy, can in the case of low-voltage (500 volts or less) and low current (dozens of Ann)
It is directly accessed circuit to measure, with the increase of household electricity, be driven by economic interests, stealing mode emerges one after another, state
Family's power grid is every year because stealing loss is more than one hundred million.A kind of existing stealing mode is will to remove the zero curve of electric energy meter, and electric energy meter is made not have
Operating voltage and stop measuring.It is in the case that off zero for the mode of stealing off zero its basic settling mode, electric energy meter remains to
Operating voltage is obtained to carry out electric-power metering, wherein battery is electric energy in the case where external circuit can not be electric energy meter power supply
Table provides operating voltage, but when both battery and external circuit should be the key that anti-lost zero metering of electric energy meter for electric energy meter power supply
One of problem.
Invention content
In view of this, the purpose of this utility model is to provide a kind of circuits to connect simple, stabilization, and battery can supply in time
The metering electric energy meter of the anti-lost zero curve of electricity.
In order to achieve the goal above, the utility model uses the metering electric energy meter of such a anti-lost zero curve, including power
Sensing circuit, reduction voltage circuit, the first rectification circuit, the second current rectifying and wave filtering circuit, third filter circuit, power supply selection circuit, standby
With power circuit, regulator circuit, the power sensing circuit connects firewire L, the input terminal of reduction voltage circuit be separately connected firewire L and
Zero curve N, the output end of power sensing circuit connect the input terminal of the first rectification circuit, and the output end connection second of reduction voltage circuit is whole
The output end of the input terminal of stream filter circuit, the output end of the first rectification circuit and the second current rectifying and wave filtering circuit is separately connected third
The input terminal of filter circuit, the input terminal of the output end connection power supply selection circuit of third filter circuit, stand-by power supply circuit
The input terminal of output end connection power supply selection circuit, the input terminal of the output end connection regulator circuit for selection circuit of powering, wherein
Power supply selection circuit includes the cathode of the cathode connection diode D3 of diode D4 and diode D3, the diode D4, two poles
The output end of the anode connection third filter circuit of pipe D4, the output end of the anode connection stand-by power supply circuit of diode D3, two
The input terminal of the cathode connection regulator circuit of pole pipe D3.
The metering electric energy meter of above-mentioned anti-lost zero curve can ensure that when zero curve does not access, electric energy meter can obtain stable work
Voltage is to be measured, only two diodes of component needed for selection circuit of powering, two diode Opposite direction connections, according to
The characteristic of diode current flow, when thering is high current or Live line Zero line normally to access on firewire, then the electricity exported by third filter circuit
Pressure is through diode D4 input voltages to regulator circuit；When missing zero curve and firewire does not have high current, then is passed through by stand-by power supply circuit
Diode D3 input voltages are crossed to regulator circuit, regulator circuit exports stable operating voltage and measured to electric energy meter, in this way
Power supply selection circuit the operation is stable, at low cost, prevent client from sneaking current using the method for falling zero curve.
It includes power transformer CT1 that this practicality, which is further arranged to power sensing circuit, and reduction voltage circuit includes varistor
RV1, resistance RP, capacitance CP, the first rectification circuit include diode D8, diode D9, diode D10, diode D11, resistance
R63, the second current rectifying and wave filtering circuit include diode D5, diode D6, diode D7, capacitance C30, and third filter circuit includes electricity
Hold in C18, capacitance C19, the power transformer CT1 and has placed firewire L, diode D8, diode D9, diode D10, two poles
Pipe D11 connection in series-parallel constitutes rectifier bridge, and the anode of diode D8 and the anode of diode D9 are separately connected the defeated of power transformer CT1
Outlet, one end of the cathode connection resistance R63 of diode D9, the both ends varistor RV1 connect zero curve N and firewire L, resistance RP and
Capacitance CP series connection, one end of one end connection resistance RP of varistor RV1, one end of capacitance CP is being separately connected diode D6 just
The cathode of pole and diode D5, the cathode of diode D6 are separately connected the anode of one end and diode D7 of capacitance C30, diode
The anode of D5 and the other end common ground connection of capacitance C30, the cathode of diode D7 and the other end of resistance R63 are connected respectively to two
The anode of pole pipe D4, capacitance C18 and capacitance C19 are in parallel, the other end of one end connection resistance R63 of capacitance C19, capacitance C19's
The other end is grounded.
Above-mentioned power sensing circuit and the first current rectifying and wave filtering circuit be in the state of being directed to zero curve detect firewire on whether there is or not
High current carries out rectification to voltage, reduction voltage circuit and the second current rectifying and wave filtering circuit be for do not fall in the case of zero curve to voltage into
Row step-down rectifier filters, and third filter circuit is as public filter circuit, respectively to the first rectification circuit, the second rectifying and wave-filtering electricity
Road carries out once filtering, secondary filtering, and circuit components are few, design is simplified.
It includes battery BAT that this practicality, which is further arranged to stand-by power supply circuit, the cathode connecting diode of the battery BAT
The anode of D3, the cathode ground connection of battery BAT.
Above-mentioned battery BAT output voltage can make in the case where falling zero curve and firewire passes through without high current to regulator circuit
Electric energy meter can obtain operating voltage in real time.
It includes voltage-stablizer U6, capacitance C10, capacitance C17, capacitance C31 that this practicality, which is further arranged to regulator circuit, described steady
The cathode of the input terminal connection diode D4 of depressor U6, the ground terminal ground connection of voltage-stablizer U6, one end of capacitance C31 connects voltage-stablizer
The output end of U6, the other end ground connection of capacitance C31, capacitance C10 and capacitance C17 are connected in parallel on the both ends capacitance C31 respectively.
The voltage that above-mentioned capacitance C10, capacitance C17, capacitance C31 export voltage-stablizer is filtered, and keeps voltage-stablizer U6 defeated
Go out stable voltage.
The voltage that this practicality is further arranged to voltage-stablizer U6 outputs is the operating voltage of electric energy meter, the model of voltage-stablizer U6
For HT7533.
The advantages of input voltage range of the voltage-stablizer of above-mentioned model HT7533 is big, output voltage stabilization.
Description of the drawings
Fig. 1 is the utility model embodiment functional-block diagram.
Fig. 2 is the utility model embodiment circuit diagram.
Fig. 3 is the utility model embodiment ammeter display metering block diagram.
Specific implementation mode
As shown in Figure 1, 2, the utility model is a kind of metering electric energy meter of anti-lost zero curve, including power sensing circuit 1, drop
Volt circuit 2, the first rectification circuit 3, the second current rectifying and wave filtering circuit 4, third filter circuit 5, power supply selection circuit 6, stand-by power supply
Circuit 7, regulator circuit 8, the power sensing circuit 1 connect firewire L, and the input terminal of reduction voltage circuit 2 is separately connected firewire L and zero
Line N, the output end of power sensing circuit 1 connect the input terminal of the first rectification circuit 3, the output end connection second of reduction voltage circuit 2
The output end of the input terminal of current rectifying and wave filtering circuit 4, the output end of the first rectification circuit 3 and the second current rectifying and wave filtering circuit 4 connects respectively
Connect the input terminal of third filter circuit 5, the input terminal of the output end connection power supply selection circuit 6 of third filter circuit 5, standby electricity
The input terminal of the output end connection power supply selection circuit 6 of source circuit 7, the output end connection regulator circuit 8 of power supply selection circuit 6
Input terminal, wherein power supply selection circuit 6 includes the cathode connection diode D3 of diode D4 and diode D3, the diode D4
Cathode, the output end of the anode connection third filter circuit 5 of diode D4, the anode connection stand-by power supply circuit of diode D3
7 output end, the input terminal of the cathode connection regulator circuit 8 of diode D3.
As shown in Figure 1, 2, 3, power sensing circuit 1 includes power transformer CT1, and reduction voltage circuit 2 includes varistor
RV1, resistance RP, capacitance CP, the first rectification circuit 3 include diode D8, diode D9, diode D10, diode D11, resistance
R63, the second current rectifying and wave filtering circuit 4 include diode D5, diode D6, diode D7, capacitance C30, and third filter circuit 5 includes
Capacitance C18, capacitance C19, stand-by power supply circuit 7 include battery BAT, and regulator circuit 8 includes voltage-stablizer U6, capacitance C10, capacitance
Firewire L, diode D8, diode D9, diode D10, diode have been placed in C17, capacitance C31, the power transformer CT1
D11 connection in series-parallel constitutes rectifier bridge, and the anode of diode D8 and the anode of diode D9 are separately connected the output of power transformer CT1
End, one end of the cathode connection resistance R63 of diode D9, the both ends varistor RV1 connect zero curve N and firewire L, resistance RP and electricity
Hold CP series connection, one end of one end connection resistance RP of varistor RV1, one end of capacitance CP is separately connected the anode of diode D6
With the cathode of diode D5, the cathode of diode D6 is separately connected the anode of one end and diode D7 of capacitance C30, diode D5
Anode and capacitance C30 other end common ground connection, the cathode of diode D7 and the other end of resistance R63 are connected respectively to two poles
The anode of pipe D4, capacitance C18 and capacitance C19 are in parallel, and the other end of one end connection resistance R63 of capacitance C19, capacitance C19's is another
One end is grounded, the anode of the cathode connecting diode D3 of the battery BAT, the cathode ground connection of battery BAT, the voltage-stablizer U6's
Input terminal connects the cathode of diode D4, the ground terminal ground connection of voltage-stablizer U6, the output of one end connection voltage-stablizer U6 of capacitance C31
End, the other end ground connection of capacitance C31, capacitance C10 and capacitance C17 are connected in parallel on the both ends capacitance C31, the electricity of voltage-stablizer U6 outputs respectively
Pressure VSYS provide operating voltage, the model HT7533 of voltage-stablizer U6 for electric energy meter.
According to above example, the operation principle of the metering electric energy meter of the anti-lost zero curve of this practicality is as follows：1, as firewire L and zero
When line N is accessed simultaneously, the non-electricity consumption of user (when not having high current to pass through on firewire), the electricity of firewire L and the 220V on zero curve N at this time
Pressure obtains W12V voltages by the decompression of reduction voltage circuit and the rectifying and wave-filtering of the second current rectifying and wave filtering circuit, and W12V voltages are by the
Three filter circuits carry out secondary filtering, obtain V12V voltages, and V12V voltages are input to voltage-stablizer U6 by diode D4 conductings, pass through
Voltage-stablizer U6 voltage stabilizing output services voltage VSYS power for electric energy meter；
2, when firewire L and zero curve N is accessed simultaneously, and user power utilization (when thering is high current to pass through on firewire), power is mutual
Sensor CT1 detects high current, by the filtering of the first rectifier circuit rectifies and third filter circuit, obtains V12V voltages, or
The voltage of firewire L and the 220V on zero curve N are obtained by the decompression of reduction voltage circuit and the rectifying and wave-filtering of the second current rectifying and wave filtering circuit
W12V voltages, W12V voltages carry out secondary filtering by third filter circuit, obtain V12V voltages, and V12V voltages pass through diode
D4 conductings are input to voltage-stablizer U6, power for electric energy meter through voltage-stablizer U6 voltage stabilizing output services voltage VSYS；
3, (fall zero curve) when firewire L accesses, zero curve N missings, the non-electricity consumption of user (when not having high current to pass through on firewire),
Reserve battery BAT passes through diode D3 output voltages to voltage-stablizer U6, through voltage-stablizer U6 voltage stabilizing output services voltages VSYS at this time
It powers for electric energy meter；
4, (fall zero curve) when firewire L accesses, zero curve N missings, and user power utilization (when thering is high current to pass through on firewire),
Power transformer CT1 detects high current, by the filtering of the first rectifier circuit rectifies and third filter circuit, obtains V12V electricity
Pressure, V12V voltages are input to voltage-stablizer U6 by diode D4 conductings, are electricity through voltage-stablizer U6 voltage stabilizing output services voltages VSYS
It can table power supply.
Claims (5)
1. a kind of metering electric energy meter of anti-lost zero curve, it is characterised in that：Including power sensing circuit, reduction voltage circuit, the first rectification
Circuit, the second current rectifying and wave filtering circuit, third filter circuit, power supply selection circuit, stand-by power supply circuit, regulator circuit, the work(
Rate sensing circuit connects firewire L, and the input terminal of reduction voltage circuit is separately connected firewire L and zero curve N, the output end of power sensing circuit
The input terminal of the first rectification circuit is connected, the output end of reduction voltage circuit connects the input terminal of the second current rectifying and wave filtering circuit, and first is whole
The output end of the output end of current circuit and the second current rectifying and wave filtering circuit is separately connected the input terminal of third filter circuit, third filtering
The input terminal of the output end connection power supply selection circuit of circuit, the output end of stand-by power supply circuit connect the defeated of power supply selection circuit
Enter end, selection circuit of powering output end connection regulator circuit input terminal, wherein power supply selection circuit include diode D4 and
The cathode of the cathode connection diode D3 of diode D3, the diode D4, the anode connection third filter circuit of diode D4
Output end, the output end of the anode connection stand-by power supply circuit of diode D3, the cathode connection regulator circuit of diode D3
Input terminal.
2. the metering electric energy meter of anti-lost zero curve according to claim 1, it is characterised in that：The power sensing circuit includes
Power transformer CT1, reduction voltage circuit include varistor RV1, resistance RP, capacitance CP, the first rectification circuit include diode D8,
Diode D9, diode D10, diode D11, resistance R63, the second current rectifying and wave filtering circuit include diode D5, diode D6, two
Pole pipe D7, capacitance C30, third filter circuit include having placed firewire in capacitance C18, capacitance C19, the power transformer CT1
L, diode D8, diode D9, diode D10, diode D11 connection in series-parallel constitute rectifier bridge, the anode of diode D8 and two poles
The anode of pipe D9 is separately connected the output end of power transformer CT1, and one end of the cathode connection resistance R63 of diode D9 is pressure-sensitive
The both ends resistance RV1 connect zero curve N and firewire L, resistance RP and capacitance CP series connection, one end connection resistance RP's of varistor RV1
One end of one end, capacitance CP is separately connected the anode of diode D6 and the cathode of diode D5, and the cathode of diode D6 connects respectively
Connect the anode of one end and diode D7 of capacitance C30, the anode of diode D5 and the other end common ground connection of capacitance C30, two poles
The cathode of pipe D7 and the other end of resistance R63 are connected respectively to the anode of diode D4, and capacitance C18 and capacitance C19 are in parallel, capacitance
The other end of one end connection resistance R63 of C19, the other end ground connection of capacitance C19.
3. the metering electric energy meter of anti-lost zero curve according to claim 2, it is characterised in that：The stand-by power supply circuit includes
Battery BAT, the anode of the cathode connecting diode D3 of the battery BAT, the cathode ground connection of battery BAT.
4. the metering electric energy meter of anti-lost zero curve according to claim 3, it is characterised in that：The regulator circuit includes voltage stabilizing
The cathode of the input terminal connection diode D4 of device U6, capacitance C10, capacitance C17, capacitance C31, the voltage-stablizer U6, voltage-stablizer U6
Ground terminal ground connection, the output end of one end connection voltage-stablizer U6 of capacitance C31, the other end ground connection of capacitance C31, capacitance C10 and
Capacitance C17 is connected in parallel on the both ends capacitance C31 respectively.
5. the metering electric energy meter of anti-lost zero curve according to claim 4, it is characterised in that：The electricity of the voltage-stablizer U6 outputs
Pressure is the operating voltage of electric energy meter, the model HT7533 of voltage-stablizer U6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820680179.3U CN208043931U (en) | 2018-05-08 | 2018-05-08 | The metering electric energy meter of anti-lost zero curve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820680179.3U CN208043931U (en) | 2018-05-08 | 2018-05-08 | The metering electric energy meter of anti-lost zero curve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208043931U true CN208043931U (en) | 2018-11-02 |
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ID=63929068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820680179.3U Active CN208043931U (en) | 2018-05-08 | 2018-05-08 | The metering electric energy meter of anti-lost zero curve |
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| Country | Link |
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| CN (1) | CN208043931U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960341A (en) * | 2021-10-27 | 2022-01-21 | 成都长城开发科技有限公司 | Ammeter and zero line detection circuitry falls thereof |
-
2018
- 2018-05-08 CN CN201820680179.3U patent/CN208043931U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113960341A (en) * | 2021-10-27 | 2022-01-21 | 成都长城开发科技有限公司 | Ammeter and zero line detection circuitry falls thereof |
| CN113960341B (en) * | 2021-10-27 | 2023-08-04 | 成都长城开发科技股份有限公司 | Ammeter and zero line-falling detection circuit thereof |
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