CN208257228U - The electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source is composed - Google Patents
The electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source is composed Download PDFInfo
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- CN208257228U CN208257228U CN201721705468.6U CN201721705468U CN208257228U CN 208257228 U CN208257228 U CN 208257228U CN 201721705468 U CN201721705468 U CN 201721705468U CN 208257228 U CN208257228 U CN 208257228U
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Abstract
The utility model discloses a kind of electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source is composed, including several constant-current sources and it is devices under, it is devices under including a main bus-bar and several branch bars, the end of incoming cables of main bus-bar is shorted by copper conductor, the output end of the output end connection branch bar of constant-current source, each constant-current source is separately connected a branch bar, the plant-grid connection phase sequence of all constant-current sources is identical, at least one includes the single-phase phase terminal positive sequence of each of duplexure of constant-current source and/or at least one includes the single-phase phase terminal inverted sequence of each of constant current resource loop.The utility model can be realized the adder or subtracter of high current, and when realizing subtracter, the total current in main bus-bar circuit, which can reduce, to be even zeroed, so as to carry out temperature rise test using the short-circuit copper conductor of smaller size.
Description
Technical field
It is composed the utility model relates to low-voltage electrical field more particularly to a kind of low-voltage, high-current AC constant-current source
Electric current arithmetic operating apparatus.
Background technique
In the temperature rise test of low-voltage complete switch equipment and control equipment, conventional method is carried out using passive load method
Test；When loading larger, biggish bus current is needed, needs the short circuit copper conductor of larger size accordingly.
Utility model content
The utility model is intended to provide a kind of electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source is composed,
It can be realized the adder or subtracter of high current, when realizing subtracter, the total current in main bus-bar circuit can reduce or even return
Zero.
In order to achieve the above objectives, the utility model adopts the following technical solutions realization:
The electric current arithmetic operating apparatus that the utility model low-voltage, high-current AC constant-current source is composed, including several perseverances
Stream source and be devices under, it is described to be devices under including a main bus-bar and several branch bars, the main bus-bar into
Line end is shorted by copper conductor, and the output end of the output end connection branch bar of the constant-current source, each constant-current source is separately connected
The plant-grid connection phase sequence of one branch bar, all constant-current sources is identical, at least one includes in the duplexure of constant-current source
Each of single-phase phase terminal positive sequence and/or at least one include the single-phase phase terminal inverted sequence of each of constant current resource loop.
Preferably, the constant-current source is three-phase constant-current source, and the main bus-bar, branch bar are three-phase.
Preferably, the current range of the duplexure is 16~2500A.
Further, series branch's breaker in the duplexure.
Further, it connects in the main bus-bar main circuit breaker.
The utility model can be realized the adder or subtracter of high current, when realizing subtracter, in main bus-bar circuit
Total current, which can reduce, to be even zeroed, so as to carry out temperature rise test using the short-circuit copper conductor of smaller size.
Detailed description of the invention
Fig. 1 is the schematic diagram of embodiment 1；
Fig. 2 is the schematic diagram of embodiment 2；
Fig. 3 is the schematic diagram of embodiment 3；
Fig. 4 is the schematic diagram of embodiment 4；
Fig. 5 is the schematic diagram of embodiment 5；
Fig. 6 is the schematic diagram of embodiment 6.
Specific embodiment
The utility model uses more three-phase constant-currents in the temperature rise test of low-voltage complete switch equipment and control equipment
Source, the equipment tested include a main bus-bar and multiple branch bars, and main bus-bar end of incoming cables is by using by regulation sectional area
It is shorted with the copper conductor of length, the output end of constant-current source is connected to using the copper conductor of regulation sectional area and length by testing equipment
The plant-grid connection phase sequence of the output end of branch bar, each constant-current source is identical, each circuit in corresponding constant-current source
Each single-phase phase terminal positive sequence (A X, a x；B X,b x；C X, c x) or inverted sequence (A X, x a；B X,x b；C X,x c)
It can be so that the superposition high current of main bus-bar obtains the effect of arithmetic addition and subtraction.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing, to this reality
It is further elaborated with novel.
Embodiment 1
As shown in Figure 1, the end of incoming cables of main bus-bar 1 is shorted by copper conductor 2, four branch bars 3 are separately connected three-phase constant
Stream source A1~A4, connect in main bus-bar 1 main circuit breaker QF0, in four branch bars 3 respectively series branch's circuit breaker Q F1~
QF4, four three-phase branch inlet wire currents are 630A, the single-phase phase terminal positive sequence of each of four three-phase branch inlet wires, and four
Three-phase duplexure is same-phase, and main bus-bar three-phase total current is that four 630A are added, i.e. 4 × 630A.
Embodiment 2
As shown in Fig. 2, the end of incoming cables of main bus-bar 1 is shorted by copper conductor 2, two branch bars 3 are separately connected three-phase constant
Stream source A1~A2, connect in main bus-bar 1 main circuit breaker QF0, in two branch bars 3 respectively series branch's circuit breaker Q F1~
The single-phase phase terminal positive sequence of each of QF2, Liang Ge three-phase branch inlet wire, two three-phase duplexure inlet wire currents are respectively
630A, 970A, two three-phase duplexures are same-phase, and main bus-bar three-phase total current is 630A+970A=1600A.
Embodiment 3
As shown in figure 3, the end of incoming cables of main bus-bar 1 is shorted by copper conductor 2,12 branch bars 3 are separately connected three-phase constant
Stream source A1~A12, connect in main bus-bar 1 main circuit breaker QF0, in 12 branch bars 3 respectively series branch's circuit breaker Q F1~
QF12, the single-phase phase terminal positive sequence of each of 12 three-phase branch inlet wires, the inlet wire current of 12 three-phase duplexures are respectively as follows:
25A, 25A, 25A, 25A, 100A, 100A, 125A, 125A, 200A, 500A, 1250A, 1500A, 12 three-phase duplexures are equal
For same-phase, main bus-bar three-phase total current is 25A+25A+25A+25A+100A+100A+125A+125A+200A+500A+
1250A+1500A=4000A.
Embodiment 4
As shown in figure 4, the end of incoming cables of main bus-bar 1 is shorted by copper conductor 2, four branch bars 3 are separately connected three-phase constant
Stream source A1~A4, connect in main bus-bar 1 main circuit breaker QF0, in four branch bars 3 respectively series branch's circuit breaker Q F1~
The single-phase phase terminal inverted sequence of each of three-phase branch inlet wire where QF4, three-phase constant-current source A4, other three three-phase branch inlet wires
Each single-phase phase terminal positive sequence, the inlet wire current and the phase of other three duplexures of duplexure where the A4 of three-phase constant-current source
Position is on the contrary, therefore main bus-bar three-phase total current is the electric current for subtracting that reverse phase after three in-phase currents are added: 630A+630A+
630A-630A=1260A；
Embodiment 5
As shown in figure 5, the end of incoming cables of main bus-bar 1 is shorted by copper conductor 2, four branch bars 3 are separately connected three-phase constant
Stream source A1~A4, connect in main bus-bar 1 main circuit breaker QF0, in four branch bars 3 respectively series branch's circuit breaker Q F1~
The single-phase phase terminal inverted sequence of each of three-phase branch inlet wire where QF4, three-phase constant-current source A3, three-phase constant-current source A4, other two
The single-phase phase terminal positive sequence of each of three-phase branch inlet wire, three-phase constant-current source A3, three-phase constant-current source in four three-phase duplexures
The opposite in phase of the inlet wire current of A4 duplexure and other two duplexures, therefore main bus-bar three-phase total current is two same
Phase current subtracts the electric current of that two reverse phases: 630A+630A-630A-630A=0A after being added；
Embodiment 6
As shown in fig. 6, the end of incoming cables of main bus-bar 1 is shorted by copper conductor 2, two branch bars 3 are separately connected three-phase constant
Stream source A1~A2, connect in main bus-bar 1 main circuit breaker QF0, in two branch bars 3 respectively series branch's circuit breaker Q F1~
The single-phase phase terminal positive sequence of each of three-phase branch inlet wire, three-phase separate where the A2 of three-phase constant-current source where QF2, three-phase constant-current source A1
The single-phase phase terminal inverted sequence of each of branch inlet wire, two three-phase duplexure inlet wire currents are 630A and 1600A respectively, therefore main mother
Line three-phase total current are as follows: 1600A-630A=970A.
This set by constant-current source and by test equipment group at the method characteristic of system be that it is possible in addition in main bus-bar
High current is synthesized, constant [the only electricity of the duplexure of partial inversion of the current strength of each duplexure is kept in subtraction
180 ° of phase change of stream, size of current is constant, according to Joule's law Q=I2RT (Q is heat in formula, and I is electric current, and R is resistance,
T is throughput time), do not have any influence to the calorific value of each duplexure of tested device], and to main bus-bar three-phase total current
Generate subtraction effect.This is that the temperature rise test carried out using passive load method can not can achieve the effect that.
Above-described embodiment illustrate the utility model by the combination of more constant-current sources, but duplexure current phase positive or
Reverse phase is subtracted each other to achieve the effect that high current mutually sums it up.Electric current specifically in case 4,5 in duplexure is only anti-
Phase, and not cancelling, the total current in main bus-bar circuit, which but reduces, to be even zeroed, this is that test method is traditional passive
What load method cannot achieve.
The utility model is suitable for three-phase main-frequency electric current but is not limited to three-phase current.
Certainly, the utility model can also have other various embodiments, without departing substantially from the spirit of the present invention and its essence
In the case of, those skilled in the art can make various corresponding changes and modifications, but these phases according to the utility model
The change and modification answered all should belong to the protection scope of the utility model the attached claims.
Claims (5)
1. the electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source is composed, it is characterised in that: including several perseverances
Stream source and be devices under, it is described to be devices under including a main bus-bar and several branch bars, the main bus-bar into
Line end is shorted by copper conductor, and the output end of the output end connection branch bar of the constant-current source, each constant-current source is separately connected
The plant-grid connection phase sequence of one branch bar, all constant-current sources is identical, at least one includes in the duplexure of constant-current source
Each of single-phase phase terminal positive sequence and/or at least one include the single-phase phase terminal inverted sequence of each of constant current resource loop.
2. the electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source according to claim 1 is composed, special
Sign is: the constant-current source is three-phase constant-current source, and the main bus-bar, branch bar are three-phase.
3. the electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source according to claim 1 is composed, special
Sign is: the current range of the duplexure is 16~2500A.
4. the electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source according to claim 1 is composed, special
Sign is: series branch's breaker in the duplexure.
5. the electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source according to claim 1 is composed, special
Sign is: main circuit breaker of connecting in the main bus-bar.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721705468.6U CN208257228U (en) | 2017-12-08 | 2017-12-08 | The electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source is composed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721705468.6U CN208257228U (en) | 2017-12-08 | 2017-12-08 | The electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source is composed |
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| Publication Number | Publication Date |
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| CN208257228U true CN208257228U (en) | 2018-12-18 |
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| CN201721705468.6U Expired - Fee Related CN208257228U (en) | 2017-12-08 | 2017-12-08 | The electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source is composed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107910795A (en) * | 2017-12-08 | 2018-04-13 | 成都产品质量检验研究院有限责任公司 | The current adder and subtracter that low-voltage, high-current AC constant-current source is composed |
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2017
- 2017-12-08 CN CN201721705468.6U patent/CN208257228U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107910795A (en) * | 2017-12-08 | 2018-04-13 | 成都产品质量检验研究院有限责任公司 | The current adder and subtracter that low-voltage, high-current AC constant-current source is composed |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181218 Termination date: 20211208 |
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| CF01 | Termination of patent right due to non-payment of annual fee |