CN208443900U - A kind of DC current transformer - Google Patents
A kind of DC current transformer Download PDFInfo
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- CN208443900U CN208443900U CN201820913696.0U CN201820913696U CN208443900U CN 208443900 U CN208443900 U CN 208443900U CN 201820913696 U CN201820913696 U CN 201820913696U CN 208443900 U CN208443900 U CN 208443900U
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- conductive bar
- current
- ammeter
- utility
- wiring
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Abstract
The utility model discloses a kind of DC current transformers, including conductive bar (1), conductive bar (1) is provided at least three wiring holes (2) on its length direction, conductive bar (1) both ends are connected on DC line (3), multiple wiring holes (2) from left to right in first be connected to ammeter (4) after any wiring thereafter.The electric current that the utility model sets fixed proportion by conductive bar when measuring the actual current of ammeter, that is, may know that the size of current of total DC line than wiring hole, and the structure is simple, at low cost, and convenient test is easy.
Description
Technical field
The utility model relates to a kind of DC current transformers, belong to DC current transformer technical field.
Background technique
When for the test of 500A or more D.C. high-current, existing general ammeter is difficult to measure, and is required to high-end direct current
Ammeter measurement, structure is complicated, and production and purchase cost are high.
Summary of the invention
Technical problem to be solved by the utility model is: a kind of DC current transformer is provided, to solve in the prior art
There are the problem of.
The technical solution that the utility model is taken are as follows: a kind of DC current transformer, including conductive bar, conductive bar is along it
At least three wiring holes are provided on length direction, conductive bar both ends are connected on DC line, and multiple wiring holes are from left to right
In first be connected to ammeter after any wiring thereafter.
Preferably, above-mentioned conductive bar uses platinum alloy or copper alloy.
The utility model has the beneficial effects that compared with prior art, the effect of the utility model is as follows:
1) the utility model by conductive bar set fixed proportion electric current than wiring hole, when the practical electricity for measuring ammeter
When stream, that is, it may know that the size of current of total DC line, the structure is simple, and production is low with purchase cost, and convenient test is easy, and surveys
It tries highly-safe；
2) multiple instrument connections are set, are tested convenient for multiple ranges of different range, application range is wider.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the measuring principle schematic diagram of the utility model.
Specific embodiment
With reference to the accompanying drawing and the utility model is described further in specific embodiment.
Embodiment 1: as Figure 1-Figure 2, a kind of DC current transformer, including conductive bar 1, conductive bar 1 is along its length
Degree direction on be provided at least three wiring holes 2,1 both ends of conductive bar are connected on DC line 3, multiple wiring holes 2 from a left side to
In the right side first be connected to ammeter 4 after any wiring thereafter.
Preferably, above-mentioned conductive bar 1 uses platinum alloy or copper alloy.
Embodiment 2: a kind of current test method of DC current transformer, this method are as follows: setting conductive bar 1 is from left to right
Resistance between first wiring hole 2 and the last one wiring hole 2 is R, and first wiring hole 2 and the last one wiring hole 2 are close
The resistance between any wiring hole before 1 both ends of conductive bar, first wiring hole and the last one wiring hole 2 is R', conductive
The maximum current of item 1 is Imax, when the electric current maximum of conductive bar, ammeter test maximum current is I'max, I'maxIt is much smaller than
Imax, ImaxIt is I'maxAt least 100 times or more, I' is determined by scaling methodmaxSize, that is, the position of wiring hole has been determined
It sets, the actually measured electric current for flowing through ammeter of ammeter of the corresponding one section of connection of R' is I', and the electric current that conductive bar (1) passes through is
I, so that
In formula: k is no-load voltage ratio；
Had by formula (1) deformation
I in formulamaxAnd I'maxIt is known that I' is measured by ammeter, the electric current I that conductive bar 1 actually passes through can be acquired.
Embodiment 3: the maximum current of conductive bar is 1000A, sets on corresponding conductive bar first wiring hole and second
The ammeter that flows through of wiring hole measures maximum current as 5A, then no-load voltage ratio is 200, if the electric current that actual current table measures is 2.5A,
The electric current that then conductive bar passes through at this time is 1,000 5 × 2.5=500A of ÷.
Embodiment 4: the maximum current of conductive bar is 1000A, sets first wiring hole and third on corresponding conductive bar
The ammeter that flows through of wiring hole measures maximum current as 10A, then no-load voltage ratio is 100, if the electric current that actual current table measures is 5A,
The electric current that conductive bar passes through at this time is 1,000 10 × 5=500A of ÷.
Embodiment 5: the maximum current of conductive bar is 1000A, sets first wiring hole and third on corresponding conductive bar
The ammeter that flows through of wiring hole measures maximum current as 8A, then no-load voltage ratio is 125, if the electric current that actual current table measures is 5A,
The electric current that conductive bar passes through at this time is 1,000 8 × 5=625A of ÷.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replacement, it should be covered within the scope of the utility model, therefore, the protection scope of the utility model should be with the power
Subject to the protection scope that benefit requires.
Claims (2)
1. a kind of DC current transformer, it is characterised in that: including conductive bar (1), conductive bar (1) is set on its length direction
It is equipped at least three wiring holes (2), conductive bar (1) both ends are connected on DC line (3), and multiple wiring holes (2) are from left to right
In first be connected to ammeter (4) after any wiring thereafter.
2. a kind of DC current transformer according to claim 1, it is characterised in that: conductive bar (1) using platinum alloy or
Copper alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820913696.0U CN208443900U (en) | 2018-06-13 | 2018-06-13 | A kind of DC current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820913696.0U CN208443900U (en) | 2018-06-13 | 2018-06-13 | A kind of DC current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208443900U true CN208443900U (en) | 2019-01-29 |
Family
ID=65089122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820913696.0U Active CN208443900U (en) | 2018-06-13 | 2018-06-13 | A kind of DC current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208443900U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802476A (en) * | 2018-06-13 | 2018-11-13 | 贵州电网有限责任公司 | A kind of DC current transformer and its current test method |
| CN108802476B (en) * | 2018-06-13 | 2024-07-02 | 贵州电网有限责任公司 | Direct current transformer and current testing method thereof |
-
2018
- 2018-06-13 CN CN201820913696.0U patent/CN208443900U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802476A (en) * | 2018-06-13 | 2018-11-13 | 贵州电网有限责任公司 | A kind of DC current transformer and its current test method |
| CN108802476B (en) * | 2018-06-13 | 2024-07-02 | 贵州电网有限责任公司 | Direct current transformer and current testing method thereof |
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