CN205246717U - Changeablely unify multiplying power than current transformer and advance to show metering device - Google Patents
Changeablely unify multiplying power than current transformer and advance to show metering device Download PDFInfo
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- CN205246717U CN205246717U CN201520926222.6U CN201520926222U CN205246717U CN 205246717 U CN205246717 U CN 205246717U CN 201520926222 U CN201520926222 U CN 201520926222U CN 205246717 U CN205246717 U CN 205246717U
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Abstract
The utility model belongs to the technical field of the electric power measurement, concretely relates to changeablely unify multiplying power than current transformer and advance to show metering device, the linear motor mover comprises an iron core, difference coiling primary winding and secondary winding on the iron core, take a percentage in iron core primary winding area, iron core secondary winding does not take and takes a percentage, it is the same that the complete first number of turns of iron core secondary winding and current transformer secondary winding make perfect / take a percentage the number of turns, the complete first number of turns of iron core primary winding is the take a percentage integral multiple of the number of turns of iron core primary winding, comparing that the full head of this multiple and current transformer secondary winding and current transformer secondary winding took a percentage is equal, current transformer secondary winding sets up the tapping switch between taking a percentage and the iron core primary winding is taken a percentage, set up first switch entirely between full head of current transformer secondary winding and the full head of iron core primary winding, the electric quantity gauge device is inserted at iron core secondary winding both ends. The utility model discloses no matter which kind of transformation ratio current current transformer uses, all can unify the multiplying power, the measurement of being convenient for.
Description
Technical field
The utility model belongs to electric-power metering technical field, is specifically related to a kind of variable specific current transformer and unifies multiplying power and enter table meteringDevice.
Background technology
In current electric-power metering field, often the current transformer of polytropic ratio is arranged in power circuit, long for power loadIn the metering system that time changes between underload and high load capacity, in the time of underload, measure by little no-load voltage ratio, when high load capacity, use largeNo-load voltage ratio metering, improves measuring accuracy with this, in the time changing by the need for electricity of electric unit, does not need extra change electric currentTransformer just can easily obtain the current ratio needing, and saves production cost, increases work efficiency.
Present power supply department adopts intelligent management mostly in each side such as electric energy metricals, and the multiplying power of each stoichiometric point is by electricityBrain is controlled, and at will changes current transformer ratio and can cause the confusion of whole Electric Power Metering Management System, therefore metering electric currentTransformer is changed will pass through a series of application and reply, needs the multidisciplinary work of power department, can cause the damage of manpower and materialsLose.
Utility model content
For solving the deficiency in above-mentioned technology, the purpose of this utility model is: provide a kind of variable specific current transformer doubly unifiedRate enters to show metering device, no matter which kind of no-load voltage ratio current current transformer uses, all can unify multiplying power, is convenient to metering.
For solving its technical problem, technical solution adopted in the utility model is:
Described variable specific current transformer is unified multiplying power and is entered to show metering device, comprises iron core, on iron core respectively winding of coiling andSecondary Winding, the tap of a winding band of iron core, iron core Secondary Winding is not with tap, and complete number of turn of iron core Secondary Winding and electric current are mutualSensor Secondary Winding is complete/and the tap number of turn is identical, the integral multiple that complete number of turn of winding of iron core is a tapping number of turn of iron core,The full head of this multiple and secondary winding in current transformer equates with the ratio of secondary winding in current transformer tap, Current Transformer Secondary aroundBetween group tap and tapping of iron core, tapping switch is set, the full head of secondary winding in current transformer is complete with winding of iron coreBetween head, complete switch is set, iron core Secondary Winding two ends access electric quantity metering device.
When complete the number of turn of complete number of turn of above-mentioned iron core Secondary Winding and secondary winding in current transformer is identical, be applicable to Current Mutual InductanceThe device Secondary Winding output current situation identical with the specified input current of electric quantity metering device; Complete number of turn of iron core Secondary Winding withWhen the tap number of turn of secondary winding in current transformer is identical, be applicable to secondary winding in current transformer output current and electric quantity metering dressPut situation about not waiting.
Wherein, preferred version is:
Described variable specific current transformer is unified multiplying power and is entered to show metering device, also comprises sample circuit and controller, and sample circuit is establishedIn secondary winding in current transformer, on the circuit of head end, sample circuit output connects controller, and sample circuit is used for gathering electricityCurrent transformer Secondary Winding output current, and this current value is passed to controller, controller judges that according to this current value it is currentLoad condition, a default standard value in controller, this numerical value those skilled in the art can be according to the parameter of current transformer voluntarilyArrange, if the current value recording higher than this standard value, judges in higher load condition that closed complete switch disconnects tap and openClose, otherwise, judging that current transformer is in low load condition, closed tapping switch, disconnects complete switch.
Described tapping switch and complete switch are taken from respectively normally opened contact and the normally-closed contact of same relay, this relay coilBe connected to controller, controller is according to the electric and power down that obtains of judged result control relay coil, and then control tapping switch and completeThe switching of switch.
Described variable specific current transformer is unified multiplying power and is entered to show metering device, also comprises sample circuit, comparison circuit and drive circuit,Sample circuit is located at secondary winding in current transformer and is started on end line, and sample circuit, comparison circuit and drive circuit are connected in turn,Tapping switch and complete switch are taken from respectively normally opened contact and the normally-closed contact of same relay, and this relay coil connects and drivesCircuit, sample circuit is used for gathering secondary winding in current transformer output current, and it is defeated that this numerical value is delivered to of comparison circuitEnter end, another input of comparison circuit is inputted a standard value, and this numerical value those skilled in the art can be according to current transformerParameter arrange voluntarily, if gather data be greater than this standard value, judge current transformer high load capacity, comparison circuit export highLevel, drive circuit action, relay coil powers on, and closed complete switch, disconnect tapping switch, otherwise comparison circuit is defeatedGo out low level, drive circuit is failure to actuate, relay coil power down, and closed tapping switch, disconnects complete switch, sample circuit,Comparison circuit and drive circuit all adopt available circuit structure, and those skilled in the art can realize completely according to prior art, thisPlace is no longer described in detail.
Described tapping switch, complete switch parallel connection protection circuit respectively, holding circuit comprises electric capacity in sequential series and resistance, shouldThe spark that circuit produces can absorb tapping switch and complete switch motion time, and eliminate variable specific current transformer Secondary Winding and openThe high pressure that road produces.
When complete the number of turn of complete number of turn of described iron core Secondary Winding and secondary winding in current transformer is identical, winding of iron core is completeThe number of turn be its tap number of turn 2-5 doubly, this structure is applicable to secondary winding in current transformer output current and electric quantity metering deviceThe identical situation of specified input current, taking complete number of turn of secondary winding in current transformer as secondary winding in current transformer tap circle5 times of number is example, when the current ratio of current transformer is 10-50/5A, supposes that the secondary winding in current transformer tap number of turn is10 circles, complete number of turn of secondary winding in current transformer is 50 circles so, and its turn ratio is 1:5, and tapping switch closure, works as electricityWhen the electric current that winding of current transformer is started, full head flows through is full scale 10A, secondary winding in current transformer is started, tapOutput electric current be 5A, the electric current that now winding of iron core is started, tap is flow through equal secondary winding in current transformer start,The electric current 5A of tap output, calculates formula I according to the current ratio of current transformer1N1＝I2N2By above-mentioned data substitution formula 5A × 10Circle=I2× 50 circles, can obtain that iron core Secondary Winding is started, full head output 1A; In like manner can obtain, complete switch closure, when electric current mutualWhen the electric current that winding of sensor is started, full head flows through is full scale 50A, iron core Secondary Winding is started, full head output 5A; ByTwo can draw above: when tapping switch is closed, winding of current transformer is started, full head input and iron core Secondary WindingStart, full head output is than being 10:1, when complete switch is closed, winding of current transformer is started, full head input and iron coreSecondary Winding is started, full head is exported than being similarly 10:1. Therefore, realized the multiplying power of current transformer 10/5A and 50/5AUnified, while now calculating electric weight, the multiplying power of current transformer is calculated according to 50/5A.
When the tap number of turn of complete number of turn of described iron core Secondary Winding and secondary winding in current transformer is identical, Current Transformer SecondaryComplete number of turn of winding is 5 times of the secondary winding in current transformer tap numbers of turn, and this structure is applicable to secondary winding in current transformer outputElectric current is 1A, the situation that the specified input current of electric quantity metering device is 5A, and when the current ratio of current transformer is 10-50/1A,Suppose that the secondary winding in current transformer tap number of turn is 10 circles, complete number of turn of secondary winding in current transformer is 50 circles so, itsTurn ratio is 1:5, and tapping switch closure, when the electric current that winding of current transformer is started, full head flows through is full scale 10ATime, secondary winding in current transformer is started, the electric current of tap output is 1A, and now winding of iron core is started, tap flows throughElectric current equals the electric current 1A that secondary winding in current transformer is started, tap is exported, and calculates formula according to the current ratio of current transformerI1N1＝I2N2By above-mentioned data substitution formula 1A × 10 circle=I2× 10 circles, can obtain that iron core Secondary Winding is started, full head output 1A;In like manner can obtain, complete switch closure, in the time that the electric current that winding of current transformer is started, full head flows through is full scale 50A,Secondary winding in current transformer is started, the electric current of tap output is 5A; By above two can draw: when tapping switch is closed,Winding of current transformer is started, full head input is started with iron core Secondary Winding, head output is than 10:1 entirely, and complete switch closesWhile closing, winding of current transformer is started, head input is started with iron core Secondary Winding entirely, head is exported than being similarly 10:1 entirely.Therefore, the multiplying power that has realized current transformer 10/1A and 50/1A is unified, and while now calculating electric weight, the multiplying power of current transformer is pressedCalculate according to 10/1A, if the specified input current ratio of secondary winding in current transformer output current and electric quantity metering device is not1/5, can carry out adaptability setting according to this rule.
Compared with prior art, the utlity model has following beneficial effect:
No matter which kind of no-load voltage ratio the current current transformer of the utility model uses, all can unify multiplying power, be convenient to metering, adopt an ironCore, difference winding of coiling and Secondary Winding on iron core, the tap of a winding band, Secondary Winding is not with tap, iron core twoInferior umber of turn and secondary winding in current transformer be complete/and the tap number of turn is identical, complete number of turn of iron core Secondary Winding and current transformer twoWhen complete the number of turn of inferior winding is identical, be applicable to the specified input of secondary winding in current transformer output current and electric quantity metering deviceThe situation that electric current is identical; When the tap number of turn of complete number of turn of iron core Secondary Winding and secondary winding in current transformer is identical, be applicable toThe specified input current of secondary winding in current transformer output current and electric quantity metering device situation not etc.; Current Transformer SecondaryBetween tapping of tapping and iron core, tapping switch is set, the full head of secondary winding in current transformer and winding of iron coreBetween full head, complete switch is set, tapping switch, complete switch switch according to the primary current size of current transformer; IronCore Secondary Winding two ends access electric quantity metering device; In metering device metering process, can be large according to the load of current current transformerLittle, its no-load voltage ratio that automatically switches, and keep metering multiplying power constant.
Brief description of the drawings
Fig. 1 is the utility model structure diagram.
In figure: 1, iron core; 2, the full head of iron core Secondary Winding; 3, the full head of secondary winding in current transformer; 4, iron core once aroundOrganize full head; 5, tapping of iron core; 6, secondary winding in current transformer tap; 7, tapping switch; 8, complete switch;9, electric quantity metering device; 10, winding of current transformer is started; 11, secondary winding in current transformer is started; 12, iron coreOne time winding is started; 13, iron core Secondary Winding is started.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model embodiment is described further:
Embodiment 1:
As shown in Figure 1, as shown in Figure 1, the present embodiment provides a kind of variable specific current transformer to unify multiplying power to enter the utility modelTable metering device, comprises iron core 1, difference winding of coiling and Secondary Winding on iron core 1, and the tap of 1 winding bands of iron core,Iron core 1 Secondary Winding is not with tap, and complete 3 numbers of turn of complete 2 numbers of turn of iron core Secondary Winding and secondary winding in current transformer are identical,Complete 4 numbers of turn of winding of iron core are the integral multiple of tapping 5 numbers of turn of iron core, this multiple and Current Transformer Secondary aroundOrganize complete 3 and equate with the ratio of secondary winding in current transformer tap 6, secondary winding in current transformer tap 6 and iron core once aroundGroup arranges tapping switch 7 between tap 5, setting between complete 4 of winding of complete 3 of secondary winding in current transformer and iron coreComplete switch 8, iron core 1 Secondary Winding two ends access electric quantity metering device 9.
Wherein, described variable specific current transformer is unified multiplying power and is entered to show metering device, also comprises sample circuit and controller, samplingCircuit is located at secondary winding in current transformer and is started on 11 circuit, and sample circuit output connects controller, and sample circuit is used forGather secondary winding in current transformer output current, and this current value is passed to controller, controller is according to this current value judgementIts current load condition, a default standard value in controller, this numerical value those skilled in the art can be according to the ginseng of current transformerNumber arranges voluntarily, if the current value recording higher than this standard value, judge in higher load condition that closed complete switch 8 breaksOpen tapping switch 7, otherwise, judging that current transformer is in low load condition, closed tapping switch 7, disconnects complete switch 8;Tapping switch 7 and complete switch 8 are taken from respectively normally opened contact and the normally-closed contact of same relay, and this relay coil connectsTo controller, controller is according to the electric and power down that obtains of judged result control relay coil, and then control tapping switch 7 and full headThe switching of switch 8; Variable specific current transformer is unified multiplying power and is entered to show metering device.
It is identical with the specified input current of electric quantity metering device 9 that this embodiment is applicable to secondary winding in current transformer output currentSituation, complete 3 numbers of turn of complete 2 numbers of turn of iron core Secondary Winding and secondary winding in current transformer are identical, with Current Transformer SecondaryComplete 3 numbers of turn of winding are that 5 times of secondary winding in current transformer tap 6 numbers of turn are example, and the current ratio of current transformer isWhen 10-50/5A, suppose that secondary winding in current transformer tap 6 numbers of turn are 10 circles, complete 3 of secondary winding in current transformer soThe number of turn is 50 circles, and its turn ratio is 1:5, and tapping switch 7 closures, when winding of current transformer starts 10, electric current is mutualWhen the electric current that the full head of winding of sensor flows through is full scale 10A, secondary winding in current transformer is started, the electric current of tap outputFor 5A, the electric current that now winding of iron core starts 12, tapping 5 of iron core flows through equals secondary winding in current transformerStart 11, the electric current 5A of tap output, calculate formula I according to the current ratio of current transformer1N1＝I2N2By above-mentioned data substitution public affairsFormula 5A × 10 circle=I2× 50 circles, can obtain that iron core Secondary Winding starts 13, complete 2 output 1A of iron core Secondary Winding; In like manner can, complete switch 8 closures, in the time that the electric current that winding of current transformer is started, full head flows through is full scale 50A, iron coreSecondary Winding is started, full head output 5A; By above two can draw: when tapping switch 7 is closed, current transformer once aroundGroup is started, full head input is started with iron core Secondary Winding, head output is than being 10:1 entirely, and when complete switch 8 closure, electric current is mutualWinding of sensor is started, head input is started with iron core Secondary Winding entirely, head is exported than being similarly 10:1 entirely. Therefore, realizeThe multiplying power of current transformer 10/5A and 50/5A unified, while now calculating electric weight, the multiplying power of current transformer is calculated according to 50/5A.
Described tapping switch 7, complete switch 8 parallel connection protection circuit respectively, holding circuit comprises electric capacity in sequential series and resistance,The spark producing when this circuit can absorb tapping switch 7 and complete switch 8 and moves, and eliminate variable specific current transformer secondaryThe high pressure that winding open circuit produces.
Embodiment 2:
The present embodiment has changed the number of turn of complete 2 of iron core Secondary Winding on the basis of embodiment 1, is applicable to current transformer twoThe unequal situation of specified input current of inferior winding output current and electric quantity metering device 9, complete 2 of described iron core Secondary WindingThe number of turn is identical with secondary winding in current transformer tap 6 numbers of turn, with secondary winding in current transformer output current 1A, electric quantity meteringThe specified input current 5A of device 9 is example, supposes that complete 3 numbers of turn of secondary winding in current transformer are secondary winding in current transformer5 times of tap 6 numbers of turn, when the current ratio of current transformer is 10-50/1A, suppose secondary winding in current transformer tap 6 circlesNumber is 10 circles, and complete 3 numbers of turn of secondary winding in current transformer are 50 circles so, and its turn ratio is 1:5, and tapping switch 7 closesClose, in the time that the electric current that winding of current transformer is started, full head flows through is full scale 10A, secondary winding in current transformer risesThe electric current of head, tap output is 1A, the electric current that now winding of iron core is started, tap is flow through equal Current Transformer Secondary aroundGroup is started, the electric current 1A of tap output, calculates formula I according to the current ratio of current transformer1N1＝I2N2By above-mentioned data substitution public affairsFormula 1A × 10 circle=I2× 10 circles, can obtain that iron core Secondary Winding is started, full head output 1A; In like manner can obtain, complete switch 8 closesClose, in the time that the electric current that winding of current transformer is started, full head flows through is full scale 50A, secondary winding in current transformer risesThe electric current of head, tap output is 5A; By above two can draw: when tapping switch 7 is closed, winding of current transformerStart, full head input is started with iron core Secondary Winding, full head output is than 10:1, S1 and P1Connect, when complete switch 8 is closed,Winding of current transformer is started, head input is started with iron core Secondary Winding entirely, head is exported than being similarly 10:1 entirely. Therefore,The multiplying power that has realized current transformer 10/1A and 50/1A is unified, and while now calculating electric weight, the multiplying power of current transformer is according to 10/1ACalculate.
Embodiment 3:
The present embodiment has changed the automatic switching structure of tapping switch 7 and complete switch 8 on the basis of embodiment 1, mainly bagDraw together sample circuit, comparison circuit and drive circuit, sample circuit is located at secondary winding in current transformer and is started on 11 end lines, adoptsSample circuit, comparison circuit and drive circuit are connected in turn, and tapping switch 7 and complete switch 8 are taken from respectively same relayNormally opened contact and normally-closed contact, this relay coil connects drive circuit, and sample circuit is used for gathering secondary winding in current transformerOutput current, and this numerical value is delivered to an input of comparison circuit, another input of comparison circuit is inputted a standard value,This numerical value those skilled in the art can arrange voluntarily according to the parameter of current transformer, if the data that gather are greater than this standard value,Judge current transformer high load capacity, comparison circuit output high level, drive circuit action, relay coil powers on, closed full headSwitch 8, disconnects tapping switch 7, otherwise, comparison circuit output low level, drive circuit is failure to actuate, relay coil power down,Closed tapping switch 7, disconnects complete switch 8, and sample circuit, comparison circuit and drive circuit all adopt available circuit structure, thisThose skilled in the art can realize completely according to prior art, no longer describe in detail herein; 8 points, described tapping switch 7, complete switchOther parallel connection protection circuit, holding circuit comprises electric capacity in sequential series and resistance, this circuit can absorb tapping switch 7 and full headThe spark producing when switch 8 moves, and eliminate the high pressure that variable specific current transformer Secondary Winding open circuit produces.
Claims (5)
1. variable specific current transformer is unified multiplying power and is entered to show a metering device, it is characterized in that, comprises iron core (1), iron core (1)Upper winding of coiling and Secondary Winding respectively, (1) winding band tap of iron core, iron core (1) Secondary Winding is not with tap,The full head of iron core Secondary Winding (2) number of turn is complete with secondary winding in current transformer/and the tap number of turn is identical, winding of iron core complete (4)The number of turn is the integral multiple of a tapping of iron core (5) number of turn, the full head of this multiple and secondary winding in current transformer (3) and electricityThe ratio of current transformer Secondary Winding tap (6) equates, secondary winding in current transformer tap (6) and tapping of iron core(5) tapping switch (7) is set, between the full head of the full head of secondary winding in current transformer (3) and winding of iron core (4) betweenComplete switch (8) is set, iron core (1) Secondary Winding two ends access electric quantity metering devices (9).
2. variable specific current transformer according to claim 1 is unified multiplying power and is entered to show metering device, it is characterized in that, also bagDraw together sample circuit and controller, sample circuit be located at secondary winding in current transformer start (11) end circuit on, sample circuitOutput connects controller.
3. variable specific current transformer according to claim 1 is unified multiplying power and is entered to show metering device, it is characterized in that, described inTapping switch (7) and complete switch (8) are taken from respectively normally opened contact and the normally-closed contact of same relay, this relay lineCircle is connected to controller.
4. variable specific current transformer according to claim 1 is unified multiplying power and is entered to show metering device, it is characterized in that, also bagDraw together sample circuit, comparison circuit and drive circuit, sample circuit is located at secondary winding in current transformer and is started on (11) end line,Sample circuit, comparison circuit and drive circuit are connected in turn, and tapping switch (7) and complete switch (8) are taken from respectively sameThe normally opened contact of relay and normally-closed contact, this relay coil connects drive circuit.
5. unify multiplying power according to the variable specific current transformer described in claim 1-4 any one and enter to show metering device, its feature existsIn, described tapping switch (7) and complete switch (8) be cross-over connection holding circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520926222.6U CN205246717U (en) | 2015-11-19 | 2015-11-19 | Changeablely unify multiplying power than current transformer and advance to show metering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520926222.6U CN205246717U (en) | 2015-11-19 | 2015-11-19 | Changeablely unify multiplying power than current transformer and advance to show metering device |
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| CN205246717U true CN205246717U (en) | 2016-05-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259382A (en) * | 2015-11-19 | 2016-01-20 | 山东浩特电气有限公司 | Multi-transformation ratio current transformer unified multiplying power metering method and device |
| CN109036812A (en) * | 2017-06-12 | 2018-12-18 | 天津市中力神盾电子科技有限公司 | current collecting device |
-
2015
- 2015-11-19 CN CN201520926222.6U patent/CN205246717U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259382A (en) * | 2015-11-19 | 2016-01-20 | 山东浩特电气有限公司 | Multi-transformation ratio current transformer unified multiplying power metering method and device |
| CN109036812A (en) * | 2017-06-12 | 2018-12-18 | 天津市中力神盾电子科技有限公司 | current collecting device |
| CN109036812B (en) * | 2017-06-12 | 2024-04-12 | 天津市中力神盾电子科技有限公司 | Current acquisition device |
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