CN107910795A - The current adder and subtracter that low-voltage, high-current AC constant-current source is composed - Google Patents
The current adder and subtracter that low-voltage, high-current AC constant-current source is composed Download PDFInfo
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- CN107910795A CN107910795A CN201711298855.7A CN201711298855A CN107910795A CN 107910795 A CN107910795 A CN 107910795A CN 201711298855 A CN201711298855 A CN 201711298855A CN 107910795 A CN107910795 A CN 107910795A
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- current
- constant
- phase
- bar
- current source
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/22—Layouts for duplicate bus-bar selection
Abstract
The present invention discloses current adder and subtracter that a kind of 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 passes through copper conductor short circuit, the output terminal of the output terminal connection branch bar of constant-current source, each constant-current source connects a branch bar respectively, the plant-grid connection phase sequence of all constant-current sources is identical, each single-phase phase terminal positive sequence and/or at least one each single-phase phase terminal inverted sequence included in constant current resource loop at least one duplexure comprising constant-current source.The present invention can realize the adder or subtracter of high current, and when realizing subtracter, the total current in main bus-bar circuit can reduce or even be zeroed, so as to carry out temperature rise test using the short-circuit copper conductor of reduced size.
Description
Technical field
The present invention relates to low-voltage electrical field, more particularly to the electric current that a kind of low-voltage, high-current AC constant-current source is composed
Adder and subtracter.
Background technology
In the temperature rise test of low-voltage complete switch equipment and control device, conventional method is carried out using passive load method
Test；, it is necessary to larger bus current when loading larger, the short circuit copper conductor of large-size is needed accordingly.
The content of the invention
The present invention is intended to provide the electric current arithmetic operating apparatus that a kind of low-voltage, high-current AC constant-current source is composed, can
Realize the adder or subtracter of high current, when realizing subtracter, the total current in main bus-bar circuit can reduce or even be zeroed.
To reach above-mentioned purpose, the present invention is realized using following technical scheme：
The current adder and subtracter that low-voltage, high-current AC constant-current source of the present invention is composed, including several constant currents
Source and it is devices under, it is described to be devices under including a main bus-bar and several branch bars, the inlet wire of the main bus-bar
End passes through copper conductor short circuit, the output terminal of the output terminal connection branch bar of the constant-current source, and each constant-current source connects one respectively
A branch bar, the plant-grid connection phase sequence of all constant-current sources is identical, at least one duplexure comprising constant-current source
Each single-phase phase terminal positive sequence and/or at least one each single-phase phase terminal inverted sequence included in 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, connect in the main bus-bar main circuit breaker.
The present invention can realize the adder or subtracter of high current, when realizing subtracter, total electricity in main bus-bar circuit
Stream can reduce or even be zeroed, so as to carry out temperature rise test using the short-circuit copper conductor of reduced size.
Brief description of the drawings
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.
Embodiment
The present invention uses more three-phase constant-current sources, quilt in the temperature rise test of low-voltage complete switch equipment and control device
The equipment of experiment includes a main bus-bar and multiple branch bars, and main bus-bar end of incoming cables is by using by regulation sectional area and length
Copper conductor short circuit, the output terminal of constant-current source is connected to female by the branch of testing equipment using the copper conductor of regulation sectional area and length
The output terminal of line, the plant-grid connection phase sequence of each constant-current source is identical, each list in each circuit in corresponding constant-current source
Phase terminal positive sequence (A X, a x of phase；BX,b x；C X, c x) or inverted sequence (A X, x a；B X,x b；C X, x c) it can just make
The superposition high current for obtaining main bus-bar obtains arithmetic addition and the effect of subtraction.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with attached drawing, to the present invention into
Row is further described.
Embodiment 1
As shown in Figure 1, the end of incoming cables of main bus-bar 1 connects three-phase constant respectively by 2 short circuit of copper conductor, four branch bars 3
Stream source A1~A4, connect in main bus-bar 1 main circuit breaker QF0, in four branch bars 3 respectively series branch circuit breaker Q F1~
QF4, four three-phase branch inlet wire currents are 630A, each single-phase phase terminal positive sequence of four three-phase branch inlet wires, 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 connects three-phase constant respectively by 2 short circuit of copper conductor, two branch bars 3
Stream source A1~A2, connect in main bus-bar 1 main circuit breaker QF0, in two branch bars 3 respectively series branch circuit breaker Q F1~
Each single-phase phase terminal positive sequence 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 connects three-phase constant respectively by 2 short circuit of copper conductor, 12 branch bars 3
Stream source A1~A12, connect in main bus-bar 1 main circuit breaker QF0, in 12 branch bars 3 respectively series branch circuit breaker Q F1~
QF12, each single-phase phase terminal positive sequence of 12 three-phase branch inlet wires, the inlet wire current of 12 three-phase duplexures are respectively：
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 connects three-phase constant respectively by 2 short circuit of copper conductor, four branch bars 3
Stream source A1~A4, connect in main bus-bar 1 main circuit breaker QF0, in four branch bars 3 respectively series branch circuit breaker Q F1~
Each single-phase phase terminal inverted sequence 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 on the contrary, therefore main bus-bar three-phase total current is three in-phase currents be added after subtract that anti-phase electric current：630A+630A+
630A-630A=1260A；
Embodiment 5
As shown in figure 5, the end of incoming cables of main bus-bar 1 connects three-phase constant respectively by 2 short circuit of copper conductor, four branch bars 3
Stream source A1~A4, connect in main bus-bar 1 main circuit breaker QF0, in four branch bars 3 respectively series branch circuit breaker Q F1~
Each single-phase phase terminal inverted sequence of three-phase branch inlet wire where QF4, three-phase constant-current source A3, three-phase constant-current source A4, other two
Each single-phase phase terminal positive sequence of three-phase branch inlet wire, three-phase constant-current source A3, three-phase constant-current source in four three-phase duplexures
The inlet wire current of A4 duplexures and the opposite in phase of other two duplexures, therefore main bus-bar three-phase total current is two same
Phase current subtracts that two anti-phase electric currents after being added：630A+630A-630A-630A=0A；
Embodiment 6
As shown in fig. 6, the end of incoming cables of main bus-bar 1 connects three-phase constant respectively by 2 short circuit of copper conductor, two branch bars 3
Stream source A1~A2, connect in main bus-bar 1 main circuit breaker QF0, in two branch bars 3 respectively series branch circuit breaker Q F1~
Each single-phase phase terminal positive sequence 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
Each single-phase phase terminal inverted sequence of branch inlet wire, two three-phase duplexure inlet wire currents are 630A and 1600A respectively, therefore main mother
Line three-phase total current is：1600A-630A=970A.
This set is that it is possible in addition in main bus-bar by the method characteristic of constant-current source and the system formed by testing equipment
High current is synthesized, keeps the current strength of each duplexure constant in subtraction【The simply electricity of the duplexure of partial inversion
180 ° of phase place change is flowed, size of current is constant, according to Joule's law Q=I2(Q is heat to RT in formula, and I is electric current, and R is resistance, T
For throughput time), there is not any influence to the caloric value of each duplexure of tested device】, and to main bus-bar three-phase total current
Produce 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 explanation present invention is combined by more constant-current sources, but duplexure current phase positive or anti-phase
So as to reach the effect that high current phase adduction is subtracted each other.Specifically the electric current in case 4,5 in duplexure is anti-phase, and
Do not cancel, the total current in main bus-bar circuit but reduces or even is zeroed, this is that test method is traditional passive load
What method can not be realized.
The present invention is suitable for three-phase main-frequency electric current but is not limited to three-phase current.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Various corresponding changes and deformation, but these corresponding changes and deformation can be made according to the present invention by knowing those skilled in the art
The protection domain of appended claims of the invention should all be belonged to.
Claims (5)
1. current adder and subtracter that low-voltage, high-current AC constant-current source is composed, it is characterised in that：Including several
Constant-current source and it is devices under, it is described to be devices under including a main bus-bar and several branch bars, the main bus-bar
End of incoming cables is connected respectively by copper conductor short circuit, the output terminal of the output terminal connection branch bar of the constant-current source, each constant-current source
A branch bar is connect, the plant-grid connection phase sequence of all constant-current sources is identical, at least one duplexure for including constant-current source
In each single-phase phase terminal positive sequence and/or it is at least one include constant current resource loop in each single-phase phase terminal inverted sequence.
2. current adder and subtracter that low-voltage, high-current AC constant-current source according to claim 1 is composed, its
It is characterized in that：The constant-current source is three-phase constant-current source, and the main bus-bar, branch bar are three-phase.
3. current adder and subtracter that low-voltage, high-current AC constant-current source according to claim 1 is composed, its
It is characterized in that：The current range of the duplexure is 16~2500A.
4. current adder and subtracter that low-voltage, high-current AC constant-current source according to claim 1 is composed, its
It is characterized in that：Series trip device in the duplexure.
5. current adder and subtracter that low-voltage, high-current AC constant-current source according to claim 1 is composed, its
It is characterized in that：Series trip device in the main bus-bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711298855.7A CN107910795A (en) | 2017-12-08 | 2017-12-08 | The current adder and subtracter that low-voltage, high-current AC constant-current source is composed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711298855.7A CN107910795A (en) | 2017-12-08 | 2017-12-08 | The current adder and subtracter that low-voltage, high-current AC constant-current source is composed |
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| CN107910795A true CN107910795A (en) | 2018-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711298855.7A Pending CN107910795A (en) | 2017-12-08 | 2017-12-08 | The current adder and subtracter that low-voltage, high-current AC constant-current source is composed |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6059121U (en) * | 1983-09-29 | 1985-04-24 | メトラー トレド アーゲー | Electromagnetic load compensation scale |
| US20120114067A1 (en) * | 2010-11-08 | 2012-05-10 | Fujitsu Limited | Emphasis signal generation circuit and signal synthesis circuit |
| CN102934043A (en) * | 2010-06-18 | 2013-02-13 | 惠普发展公司，有限责任合伙企业 | Systems and methods for determining electrical connectivity |
| CN203882224U (en) * | 2014-05-16 | 2014-10-15 | 中国航天科技集团公司第九研究院第七七一研究所 | Program-controlled constant-current source circuit |
| CN105044492A (en) * | 2015-06-24 | 2015-11-11 | 温州大学 | Low-voltage electrical complete switch equipment temperature rise test system |
| CN208257228U (en) * | 2017-12-08 | 2018-12-18 | 成都产品质量检验研究院有限责任公司 | The electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source is composed |
-
2017
- 2017-12-08 CN CN201711298855.7A patent/CN107910795A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6059121U (en) * | 1983-09-29 | 1985-04-24 | メトラー トレド アーゲー | Electromagnetic load compensation scale |
| CN102934043A (en) * | 2010-06-18 | 2013-02-13 | 惠普发展公司，有限责任合伙企业 | Systems and methods for determining electrical connectivity |
| US20120114067A1 (en) * | 2010-11-08 | 2012-05-10 | Fujitsu Limited | Emphasis signal generation circuit and signal synthesis circuit |
| CN203882224U (en) * | 2014-05-16 | 2014-10-15 | 中国航天科技集团公司第九研究院第七七一研究所 | Program-controlled constant-current source circuit |
| CN105044492A (en) * | 2015-06-24 | 2015-11-11 | 温州大学 | Low-voltage electrical complete switch equipment temperature rise test system |
| CN208257228U (en) * | 2017-12-08 | 2018-12-18 | 成都产品质量检验研究院有限责任公司 | The electric current arithmetic operating apparatus that low-voltage, high-current AC constant-current source is composed |
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