CN206638802U - A kind of electric energy meter is unloaded to measure online inspection tester - Google Patents
A kind of electric energy meter is unloaded to measure online inspection tester Download PDFInfo
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- CN206638802U CN206638802U CN201720352457.8U CN201720352457U CN206638802U CN 206638802 U CN206638802 U CN 206638802U CN 201720352457 U CN201720352457 U CN 201720352457U CN 206638802 U CN206638802 U CN 206638802U
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Abstract
The utility model belongs to the technical field of electric energy metrical detection, and in particular to a kind of electric energy meter is unloaded to measure online inspection tester；The technical problem of solution is：A kind of electric line zero load or shunt running are provided and judge a kind of unloaded online inspection tester of metering of the whether correct electric energy meter of the connection circuit polarity and phase of transformer and electric energy meter online；The technical scheme used for：A kind of electric energy meter is unloaded to measure online inspection tester, it is characterised in that：Including MCU microprocessors, AD analog-digital converters, LCD liquid crystal displays, zero cross detection circuit, wave filter, sampled voltage transformer and amplifier, the zero cross detection circuit includes the first zero cross detection circuit GL1, the second zero cross detection circuit GL2 and the 3rd zero cross detection circuit GL3, and the wave filter includes the first wave filter LB1, the second wave filter LB2, the 3rd wave filter LB3, the 4th wave filter LB4, the 5th wave filter LB5 and the 6th wave filter LB6；The utility model is applied to electric energy metrical on-line checking field.
Description
Technical field
The utility model belongs to the technical field of electric energy metrical detection, and in particular to a kind of unloaded metering of electric energy meter is patrolled online
Examine tester.
Background technology
Electric energy metrical loop is made up of current transformer, voltage transformer, electric energy meter etc., in inspection electric energy metrical loop
In, it is frequently encountered that electric energy meter is unloaded or light load shunt running, and the situation that existing instrument can not detect, now electric energy meter shows
It is zero or under shunt running state to show electric current, and existing electric energy meter tester can not judge the wiring of transformer and electric energy meter online
Whether loop polarity and phase are correct, and whether each component working is normal, and gauge check personnel often have no result and returned.
Utility model content
The utility model overcomes the shortcomings of the prior art, and technical problem to be solved is：For phase three-wire three or
Person's three-phase and four-line electric energy metrical loop provides a kind of connection circuit polarity and phase that can judge transformer and electric energy meter online
Whether correct electric energy meter is unloaded is measured online inspection tester.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of unloaded metering of electric energy meter exists
Line inspection tester, for phase three-wire three electric energy metrical loop, including MCU microprocessors, AD analog-digital converters, LCD liquid crystals
Show device, zero cross detection circuit, wave filter, sampled voltage transformer and amplifier, the zero cross detection circuit includes the first zero passage
Circuit GL1 and the second zero cross detection circuit GL2 is detected, the wave filter includes the first wave filter LB1, the second wave filter LB2, the
Three wave filter LB3 and the 4th wave filter LB4, the sampled voltage transformer include the first sampled voltage transformer VT1 and second
Sampled voltage transformer VT2, the amplifier include the first amplifier FD1 and the second amplifier FD2；
The phase three-wire three electric energy metrical loop includes electric energy meter Wh, three-phase three-line voltage transformer VT, A phase current mutual inductance
Device A-CT and C phase current mutual inductor C-CT；
The primary side of the first sampled voltage transformer VT1 and the second sampled voltage transformer VT2 primary side are distinguished
Cascade and connect with three-phase three-line voltage transformer VT secondary side, the first sampled voltage transformer VT1's is secondary pendant polar
End and the second sampled voltage transformer VT2 secondary side polar end pass through the first wave filter LB1 and the second wave filter LB2 mono- respectively
Road is connected with the input of AD analog-digital converters, the first sampled voltage transformer VT1 secondary side non-polar end and the second sampling
Voltage transformer VT2 secondary sides non-polar end is connected with internal equipotential；The first wave filter LB1 and the second wave filter
LB2 another way passes through the defeated of the first zero cross detection circuit GL1 and the second zero cross detection circuit GL2 and MCU microprocessors respectively
Enter end be connected, the AD analog-digital converters are connected with MCU microprocessor through bus, the output end of the MCU microprocessors and
LCD liquid crystal displays are connected；
The input of the first amplifier FD1 and the second amplifier FD2 input respectively with A phase current mutual inductors A-
CT with C phase current mutual inductors C-CT secondary polarity end S1 is connected, the first amplifier FD1 output end and the second amplifier FD2
Output end be connected respectively by the 3rd wave filter LB3 and the 4th wave filter LB4 with the input of AD analog-digital converters, first puts
The input and output of big device FD1 amplification control terminal and the second amplifier FD2 amplification control terminal respectively with MCU microprocessors control
End connection.
For three-phase and four-line electric energy metrical loop, in addition to the 3rd zero cross detection circuit GL3, the 5th wave filter LB5, the 6th
Wave filter LB6, the 3rd sampled voltage transformer VT3 and the 3rd amplifier FD3；
The three-phase and four-line electric energy metrical loop includes electric energy meter Wh, three-phase three-line voltage transformer VT, A phase current mutual inductance
Device A-CT, B phase current mutual inductor B-CT and C phase current mutual inductor C-CT；
The primary side and the 3rd of the primary side of the first sampled voltage transformer VT1, the second sampled voltage transformer VT2
Sampled voltage transformer VT3 primary sides are cascaded and connect with three-phase and four-line voltage transformer VT secondary side respectively, and described first adopts
Sample voltage transformer VT1, the second sampled voltage transformer VT2 and the 3rd sampled voltage transformer VT3 secondary sides polar end difference
It is connected by the first wave filter LB1, the second wave filter LB2 and the 5th wave filter LB5 with the input of AD analog-digital converters, first
The secondary side non-polar end and the 3rd of sampled voltage transformer VT1 secondary side non-polar end, the second sampled voltage transformer VT2
Sampled voltage transformer VT3 secondary side non-polar end is connected with internal equipotential；The first wave filter LB1, the second filter
Ripple device LB2 and the 5th wave filter LB5 passes through the first zero cross detection circuit GL1, the second zero cross detection circuit GL2 and the 3rd mistake respectively
Zero detection circuit GL3 is connected with the input of MCU microprocessors；
The input of the input of the first amplifier FD1, the second amplifier FD2 input and the 3rd amplifier FD3
Hold the secondary side polar end with A phase current mutual inductor A-CT, B phase current mutual inductor B-CT and C phase current mutual inductors C-CT respectively
S1 connections, the output end difference of the first amplifier FD1 output end, the second amplifier FD2 output end and the 3rd amplifier FD3
It is connected by the 3rd wave filter LB3, the 4th wave filter LB4 and the 6th wave filter LB6 with the input of AD analog-digital converters, first
The amplification control terminal point of amplifier FD1 amplification control terminal, the second amplifier FD2 amplification control terminal and the 3rd amplifier FD3
It is not connected with the input and output control terminal of MCU microprocessors.
The utility model has the advantages that compared with prior art：
A kind of electric energy meter of the utility model is unloaded to measure online inspection tester, including MCU microprocessors, AD analog-to-digital conversions
Device, LCD liquid crystal displays, zero cross detection circuit, wave filter, sampled voltage transformer and amplifier；The zero cross detection circuit
Including the first zero cross detection circuit GL1, the second zero cross detection circuit GL2 and the 3rd zero cross detection circuit GL3, the wave filter bag
Include the first wave filter LB1, the second wave filter LB2, the 3rd wave filter LB3, the 4th wave filter LB4, the 5th wave filter LB5 and the 6th
Wave filter LB6, the sampled voltage transformer include the first sampled voltage transformer VT1, the second sampled voltage transformer VT2 and
3rd sampled voltage transformer VT3, the amplifier include the first amplifier FD1, the second amplifier FD2 and the 3rd amplifier
FD3；The utility model the first sampled voltage transformer VT1, the second sampled voltage transformer VT2, the 3rd sampled voltage transformer
VT3 is by cascading and connecing threephase potential transformer online acquisition voltage signal in electric energy metrical loop, and by every phase electricity
Current transformer CT polar end current signal is exaggerated processing, then by AD analog-digital converters to transmit a signal to MCU micro-
Processor, MCU microprocessors judge the positive and negative of polarity by the method for counter circuit admittance, and MCU microprocessors are according to default
Sequential operation judge after issue LCD liquid crystal displays, LCD liquid crystal displays show electric energy metrical loop voltage U, electric current I,
Phase and polarity simultaneously can draw phasor diagram with this data, and polarity by buzzer warning as can be reversely prompted.
Brief description of the drawings
The utility model is described in more detail below in conjunction with the accompanying drawings；
Fig. 1 is the connection principle schematic diagram of embodiment one provided by the utility model；
Fig. 2 is the connection principle schematic diagram of embodiment two provided by the utility model；
In figure：1 is inspection tester, and 2 be MCU microprocessors, and 3 be AD analog-digital converters, and 4 be LCD liquid crystal displays.
Embodiment
, below will be to the utility model to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Technical scheme in embodiment is clearly and completely described, it is clear that described embodiment is a part of the present utility model
Embodiment, rather than whole embodiments；Based on the embodiment in the utility model, those of ordinary skill in the art are not making
Go out under the premise of creative work the every other embodiment obtained, belong to the scope of the utility model protection.
Embodiment one
Fig. 1 is that a kind of unloaded wiring for measuring the embodiment one that online inspection tester provides of electric energy meter of the utility model is former
Manage schematic diagram, the present embodiment for illustrating exemplified by the electric energy metrical loop of phase three-wire three V-v connections, as shown in figure 1,
A kind of electric energy meter is unloaded to measure online inspection tester, including MCU microprocessors, AD analog-digital converters, LCD liquid crystal displays,
Zero cross detection circuit, wave filter, sampled voltage transformer and amplifier, the zero cross detection circuit include the first zero passage detection electricity
Road GL1 and the second zero cross detection circuit GL2, the wave filter include the first wave filter LB1, the second wave filter LB2, the 3rd filtering
Device LB3 and the 4th wave filter LB4, the sampled voltage transformer include the sampling electricity of the first sampled voltage transformer VT1 and second
Transformer VT2 is pressed, the amplifier includes the first amplifier FD1 and the second amplifier FD2；
The electric energy metrical loop of the phase three-wire three V-v connections includes electric energy meter Wh, three-phase three-line voltage transformer VT, A
Phase current mutual inductor A-CT and C phase current mutual inductor C-CT；
The primary side of the first sampled voltage transformer VT1 and the second sampled voltage transformer VT2 primary side are distinguished
Cascade and connect with three-phase three-line voltage transformer VT4 secondary side, effect is that bis- line voltage 100V of AB and CB are changed into 2V；
The secondary side polar end of the secondary side polar end of the first sampled voltage transformer VT1 and the second sampled voltage transformer VT2
It is connected respectively by the first wave filter LB1 and the second wave filter LB2 with the input of AD analog-digital converters, the first sampled voltage is mutual
Sensor VT1 secondary side non-polar end and the second sampled voltage transformer VT2 secondary sides non-polar end with internal equipotential phase
Even, effect is to gather the signal of three-phase three-line voltage transformer VT in electric energy metrical loop；The first wave filter LB1 and second
Wave filter LB2 passes through the input of the first zero cross detection circuit GL1 and the second zero cross detection circuit GL2 and MCU microprocessors respectively
End is connected, and the effect of zero cross detection circuit is that the square wave for sine wave being changed into Transistor-Transistor Logic level gives MCU microprocessors, for same pacing
Measure and calculate three-phase three-line voltage transformer VT phase；The AD analog-digital converters are connected with MCU microprocessor through bus
Data transfer and control are realized, the output end of the MCU microprocessors is connected with LCD liquid crystal displays to be realized output and judge；
The input of the first amplifier FD1 and the second amplifier FD2 input respectively with A phase current mutual inductors A-
CT with C phase current mutual inductors C-CT secondary polarity end S1 is connected, the first amplifier FD1 output end and the second amplifier FD2
Output end be connected respectively by the 3rd wave filter LB3 and the 4th wave filter LB4 with the input of AD analog-digital converters, first puts
The input and output of big device FD1 amplification control terminal and the second amplifier FD2 amplification control terminal respectively with MCU microprocessors control
End connection, realizes that current signal multiplication factor can be adjusted in synchronism.
Specifically, the first sampled voltage transformer VT1 and the second sampled voltage transformer VT2 (no-load voltage ratios：100V/2V,
Capacity：0VA, class of accuracy：0.1 grade) primary side in electric energy metrical loop on electric energy meter Wh corresponding terminals successively respectively with electric energy
Three-phase three-line voltage transformer VT secondary side is cascaded and connect in measurement loop, and bis- line voltage 100V of AB and CB are changed into
2V；The first sampled voltage transformer VT1 and the second sampled voltage transformer VT2 secondary sides polar end pass through respectively successively
One wave filter LB1 (50Hz band logicals) and the second wave filter LB2 (50Hz band logicals) filtering after be divided into two-way, all the way directly with AD moduluses
The input of converter 3 is connected, and AD analog-digital converters 3 carry out analog-to-digital conversion according to the instruction of MCU microprocessors 2, and will collection
Threephase potential transformer VT signal passes MCU microprocessors 2, AD analog-digital converters 3 and the micro- places of MCU back again in electric energy metrical loop
Manage device 2 to connect using bus, the first sampled voltage transformer VT1 and the second sampled voltage transformer VT2 secondary side non-polar ends
Uniformly it is connected in internal equipotential；First wave filter LB1 described in another way and the second wave filter LB2 pass through the first mistake respectively successively
Zero detection circuit GL1 and the second zero cross detection circuit GL2 is connected with the input of MCU microprocessors 2, and sine wave is changed into TTL
The square wave of level for synchro measure and calculates the phase of threephase potential transformer VT in electric energy metrical loop to MCU microprocessors 2
Position；At the same time, MCU microprocessors 2 identify that A phase current mutual inductor A-CT and C phase currents are mutual respectively according to AD analog-digital converters 3
The secondary polarity end S1 size of current of sensor controls multiplication factor, wherein multiplication factor by MCU microprocessors 2 P1.0 and
P1.1 input and output control pin be coupled with successively the first amplifier FD1 and the second amplifier FD2 control terminal pin A0 and
A1 is shown in Table 1 come what is controlled, and amplified signal transmits a signal to after the 3rd wave filter LB3 and the 4th wave filter LB4 filtering
AD analog-digital converters 3, AD analog-digital converters 3 carry out analog-to-digital conversion according to the instruction of MCU microprocessors 2, and signal is passed back again
MCU microprocessors 2；MCU microprocessors 2 issue LCD liquid crystal displays 4, LCD liquid crystals after judging according to default sequential operation
Show that device 4 shows line voltage distribution U, electric current I, power factorWith polarity and phasor diagram can be drawn with this data, polarity is anti-
To can be prompted by buzzer warning.
Embodiment two
Fig. 2 is that a kind of unloaded wiring for measuring the embodiment two that online inspection tester provides of electric energy meter of the utility model is former
Schematic diagram is managed, on the basis of embodiment one, the present embodiment is for exemplified by the electric energy metrical loop of three-phase and four-line Y-y connections
Illustrate, as shown in Fig. 2 also including the 3rd zero cross detection circuit GL3, the 5th wave filter LB5, the 6th wave filter LB6, the 3rd
Sampled voltage transformer VT3 and the 3rd amplifier FD3.
The three-phase and four-line electric energy metrical loop also includes three-phase and four-line voltage transformer VT and B phase current mutual inductor B-
CT。
The primary side and the 3rd of the primary side of the first sampled voltage transformer VT1, the second sampled voltage transformer VT2
Sampled voltage transformer VT3 primary sides are cascaded and connect with three-phase and four-line voltage transformer VT secondary side respectively, and effect is A
Phase, B phases and the secondary phase voltage of C phasesAll it is changed intoThe first sampled voltage transformer VT1, the second sampling electricity
Press transformer VT2 and the 3rd sampled voltage transformer VT3 secondary sides polar end respectively by the first wave filter LB1, the second filtering
Device LB2 and the 5th wave filter LB5 are connected with the input of AD analog-digital converters, the first sampled voltage transformer VT1 secondary side
The secondary side of non-polar end, the second sampled voltage transformer VT2 secondary side non-polar end and the 3rd sampled voltage transformer VT3
Non-polar end is connected with internal equipotential；The first wave filter LB1, the second wave filter LB2 and the 5th wave filter LB5 difference
Pass through the first zero cross detection circuit GL1, the second zero cross detection circuit GL2 and the 3rd zero cross detection circuit GL3 and MCU microprocessor
Input be connected.
The input of the input of the first amplifier FD1, the second amplifier FD2 input and the 3rd amplifier FD3
Hold the secondary polarity end S1 with A phase current mutual inductor A-CT, B phase current mutual inductor B-CT and C phase current mutual inductors C-CT respectively
Connection, the output end of the first amplifier FD1 output end, the second amplifier FD2 output end and the 3rd amplifier FD3 are led to respectively
Cross the 3rd wave filter LB3, the 4th wave filter LB4 and the 6th wave filter LB6 with the input of AD analog-digital converters to be connected, first puts
Device FD1 amplification control terminal, the second amplifier FD2 amplification control terminal and the 3rd amplifier FD3 amplification control terminal difference greatly
It is connected with the input and output control terminal of MCU microprocessors.
Specifically, the first sampled voltage transformer VT1, the second sampled voltage transformer VT2 and the 3rd sampled voltage
Transformer VT3 (no-load voltage ratios：Capacity：0VA, class of accuracy：0.1 grade) primary side electricity in electric energy metrical loop
It can cascade and connect with the secondary side of three-phase and four-line voltage transformer VT in electric energy metrical loop respectively successively on table Wh corresponding terminals,
A phases, B phases and the secondary phase voltage of C phasesAll it is changed intoThe first sampled voltage transformer VT1, second are adopted
Sample voltage transformer VT2 and the 3rd sampled voltage transformer VT3 secondary sides polar end pass through the first wave filter LB1 respectively successively
It is divided into two-way after (50Hz band logicals), the second wave filter LB2 (50Hz band logicals) and the 5th wave filter LB5 (50Hz band logicals) filtering, one
Input of the road directly with AD analog-digital converters 3 is connected, and AD analog-digital converters 3 carry out modulus according to the instruction of MCU microprocessors 2
Conversion, and pass the signal for gathering three-phase and four-line voltage transformer VT in electric energy metrical loop back MCU microprocessors 2, AD moulds again
Number converter 3 is connected with MCU microprocessors 2 using bus, the first sampled voltage transformer VT1, the second sampled voltage transformer
VT2 and the 3rd sampled voltage transformer VT3 secondary sides non-polar end are uniformly connected in internal equipotential；First filter described in another way
Ripple device LB1 (50Hz band logicals), the second wave filter LB2 (50Hz band logicals) and the 5th wave filter LB5 (50Hz band logicals) lead to respectively successively
Cross the first zero cross detection circuit GL1, the second zero cross detection circuit GL2 and the 3rd zero cross detection circuit GL3 and MCU microprocessor 2
Input be connected, the square wave that sine wave is changed into Transistor-Transistor Logic level for synchro measure and calculates electric energy meter to MCU microprocessors 2
Measure the phase of three-phase and four-line voltage transformer VT in loop；At the same time, MCU microprocessors 2 are distinguished according to AD analog-digital converters 3
The secondary polarity end S1 size of current of identification A phase current mutual inductor A-CT, B phase current mutual inductors and C phase current mutual inductors is controlled
Multiplication factor processed, wherein multiplication factor are coupled with successively by P1.0 the and P1.1 input and output control pin of MCU microprocessors 2
First amplifier FD1, the second amplifier FD2 and the 3rd amplifier FD3 control terminal pin A0 and A1 are shown in Table 1 come what is controlled, put
Signal transmits a signal to AD moulds after the 3rd wave filter LB3, the 4th wave filter LB4 and the 6th wave filter LB6 filtering after big
Number converter 3, AD analog-digital converters 3 carry out analog-to-digital conversion according to the instruction of MCU microprocessors 2, and it is micro- that signal is passed back to MCU again
Processor 2；MCU microprocessors 2 issue LCD liquid crystal displays 4, LCD liquid crystal displays 4 after judging according to default sequential operation
Show line voltage distribution U, electric current I, power factorWith polarity and phasor diagram can be drawn with this data, the pole reversal can
To be prompted by buzzer warning.
The model W78E516B of the MCU microprocessors.
The model MAX197 of the AD analog-digital converters.
The first wave filter LB1, the second wave filter LB2, the 3rd wave filter LB3, the 4th wave filter LB4, the 5th filtering
Device LB5 and the 6th wave filter LB6 model MAX291.
The first amplifier FD1, the second amplifier FD2 and the 3rd amplifier FD3 model PGA204.
Table 1
| Multiple | 1 | 10 | 100 | 1000 |
| A1 | 0 | 0 | 1 | 1 |
| A0 | 0 | 1 | 0 | 1 |
Finally it should be noted that：Various embodiments above is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Understand：It can still modify to the technical scheme described in foregoing embodiments, either to which part or whole
Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly
The scope of each embodiment technical scheme of type.
Claims (2)
1. a kind of electric energy meter is unloaded to measure online inspection tester, for phase three-wire three electric energy metrical loop, it is characterised in that：Bag
Include MCU microprocessors, AD analog-digital converters, LCD liquid crystal displays, zero cross detection circuit, wave filter, sampled voltage transformer and
Amplifier, the zero cross detection circuit include the first zero cross detection circuit GL1 and the second zero cross detection circuit GL2, the filtering
It is mutual that device includes the first wave filter LB1, the second wave filter LB2, the 3rd wave filter LB3 and the 4th wave filter LB4, the sampled voltage
Sensor includes the first sampled voltage transformer VT1 and the second sampled voltage transformer VT2, and the amplifier includes the first amplifier
FD1 and the second amplifier FD2；
The phase three-wire three electric energy metrical loop includes electric energy meter Wh, three-phase three-line voltage transformer VT, A phase current mutual inductor A-
CT and C phase current mutual inductors C-CT；
The primary side of the first sampled voltage transformer VT1 and the second sampled voltage transformer VT2 primary side are respectively with three
The line voltage transformer VT of phase three secondary side is cascaded and connect, the secondary side polar end of the first sampled voltage transformer VT1 and
Second sampled voltage transformer VT2 secondary side polar end respectively by the first wave filter LB1 and the tunnels of the second wave filter LB2 mono- with
The input of AD analog-digital converters is connected, the first sampled voltage transformer VT1 secondary side non-polar end and the second sampled voltage
Transformer VT2 secondary sides non-polar end is connected with internal equipotential；The first wave filter LB1's and the second wave filter LB2
Another way passes through the first zero cross detection circuit GL1 and the second zero cross detection circuit GL2 and MCU microprocessors input phase respectively
Even, the AD analog-digital converters are connected with MCU microprocessor through bus, output end and the LCD liquid crystal of the MCU microprocessors
Display is connected；
The input of the first amplifier FD1 and the second amplifier FD2 input respectively with A phase current mutual inductors A-CT and
C phase current mutual inductors C-CT secondary polarity end S1 connections, the first amplifier FD1 output end and the second amplifier FD2's is defeated
Go out end respectively by the 3rd wave filter LB3 and the 4th wave filter LB4 with the input of AD analog-digital converters to be connected, the first amplifier
The input and output control terminal of FD1 amplification control terminal and the second amplifier FD2 amplification control terminal respectively with MCU microprocessors connects
Connect.
2. a kind of electric energy meter according to claim 1 is unloaded to measure online inspection tester, based on three-phase and four-line electric energy
Measure loop, it is characterised in that：Also include the 3rd zero cross detection circuit GL3, the 5th wave filter LB5, the 6th wave filter LB6, the 3rd
Sampled voltage transformer VT3 and the 3rd amplifier FD3；
The three-phase and four-line electric energy metrical loop includes electric energy meter Wh, three-phase three-line voltage transformer VT, A phase current mutual inductor A-
CT, B phase current mutual inductor B-CT and C phase current mutual inductor C-CT；
The primary side of the first sampled voltage transformer VT1, the second sampled voltage transformer VT2 primary side and the 3rd sampling
Voltage transformer VT3 primary sides are cascaded and connect with three-phase and four-line voltage transformer VT secondary side respectively, the first sampling electricity
Pressure transformer VT1, the second sampled voltage transformer VT2 and the 3rd sampled voltage transformer VT3 secondary side polar ends pass through respectively
First wave filter LB1, the second wave filter LB2 and the 5th wave filter LB5 are connected with the input of AD analog-digital converters, the first sampling
Voltage transformer VT1 secondary side non-polar end, the second sampled voltage transformer VT2 secondary side non-polar end and the 3rd sampling
Voltage transformer VT3 secondary side non-polar end is connected with internal equipotential；The first wave filter LB1, the second wave filter
LB2 and the 5th wave filter LB5 is examined by the first zero cross detection circuit GL1, the second zero cross detection circuit GL2 and the 3rd zero passage respectively
Slowdown monitoring circuit GL3 is connected with the input of MCU microprocessors；
The input of the input of the first amplifier FD1, the second amplifier FD2 input and the 3rd amplifier FD3 point
Secondary side polar end S1 not with A phase current mutual inductor A-CT, B phase current mutual inductor B-CT and C phase current mutual inductors C-CT connects
Connect, the output end of the first amplifier FD1 output end, the second amplifier FD2 output end and the 3rd amplifier FD3 passes through respectively
3rd wave filter LB3, the 4th wave filter LB4 and the 6th wave filter LB6 are connected with the input of AD analog-digital converters, the first amplification
The amplification control terminal of device FD1 amplification control terminal, the second amplifier FD2 amplification control terminal and the 3rd amplifier FD3 respectively with
The input and output control terminal connection of MCU microprocessors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720352457.8U CN206638802U (en) | 2017-04-06 | 2017-04-06 | A kind of electric energy meter is unloaded to measure online inspection tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720352457.8U CN206638802U (en) | 2017-04-06 | 2017-04-06 | A kind of electric energy meter is unloaded to measure online inspection tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206638802U true CN206638802U (en) | 2017-11-14 |
Family
ID=60247583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720352457.8U Active CN206638802U (en) | 2017-04-06 | 2017-04-06 | A kind of electric energy meter is unloaded to measure online inspection tester |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772212A (en) * | 2017-04-06 | 2017-05-31 | 马斌 | The unloaded metering of electric energy meter patrols and examines tester online |
| CN111415558A (en) * | 2020-05-28 | 2020-07-14 | 广东电网有限责任公司培训与评价中心 | Parallel low-voltage three-phase four-wire electric energy metering simulation wiring training cabinet |
| CN111537785A (en) * | 2020-05-25 | 2020-08-14 | 国网山西省电力公司营销服务中心 | Three-phase secondary circuit no-load on-line inspection tester |
-
2017
- 2017-04-06 CN CN201720352457.8U patent/CN206638802U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772212A (en) * | 2017-04-06 | 2017-05-31 | 马斌 | The unloaded metering of electric energy meter patrols and examines tester online |
| CN106772212B (en) * | 2017-04-06 | 2023-10-27 | 太原山互科技有限公司 | No-load metering on-line inspection tester for electric energy meter |
| CN111537785A (en) * | 2020-05-25 | 2020-08-14 | 国网山西省电力公司营销服务中心 | Three-phase secondary circuit no-load on-line inspection tester |
| CN111415558A (en) * | 2020-05-28 | 2020-07-14 | 广东电网有限责任公司培训与评价中心 | Parallel low-voltage three-phase four-wire electric energy metering simulation wiring training cabinet |
| CN111415558B (en) * | 2020-05-28 | 2022-03-29 | 广东电网有限责任公司培训与评价中心 | Parallel low-voltage three-phase four-wire electric energy metering simulation wiring training cabinet |
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Effective date of registration: 20180918 Address after: 030000 909B room, Danyang science and technology building, 9 tech street, Taiyuan hi tech Zone, Shanxi Patentee after: Taiyuan Shanhu Technology Co., Ltd. Address before: 030000 No. 1, unit 4, 4 23 South Road, Xiaodian District, Taiyuan, Shanxi. Patentee before: Ma Bin |