CN208568897U - A kind of DC voltage transformer - Google Patents
A kind of DC voltage transformer Download PDFInfo
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- CN208568897U CN208568897U CN201820914454.3U CN201820914454U CN208568897U CN 208568897 U CN208568897 U CN 208568897U CN 201820914454 U CN201820914454 U CN 201820914454U CN 208568897 U CN208568897 U CN 208568897U
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- conductive bar
- voltage
- voltmeter
- wiring
- utility
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Abstract
The utility model discloses a kind of DC voltage transformers, including conductive bar, conductive bar is provided at least three wiring holes on its length direction, conductive bar upper and lower ends are connected on positive DC line and negative DC line, multiple wiring holes from top to bottom in first be connected to voltmeter after any wiring thereafter.The voltage that the utility model sets fixed proportion by conductive bar when measuring the actual current of voltmeter, that is, may know that the voltage swing of total DC line than wiring hole, and the structure is simple, and production is low with purchase cost, and convenient test is easy, and Security of test is high.
Description
Technical field
The utility model relates to a kind of DC voltage transformers, belong to DC voltage transformer technical field.
Background technique
For 500A or more D.C. high-current voltage tester when, existing general voltmeter is difficult to measure, and is required to height
D.C. voltmeter measurement is held, 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 voltage 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 voltage transformer, including conductive bar, conductive bar is along it
At least three wiring holes are provided on length direction, conductive bar upper and lower ends are connected to positive DC line and negative DC line
On, multiple wiring holes from top to bottom in first be connected to voltmeter 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 voltage than wiring hole, when the practical electricity for measuring voltmeter
When stream, that is, it may know that the voltage swing 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；
3) voltmeter is connected close to negative DC line, and safety is higher.
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 voltage transformer, including conductive bar 1, conductive bar 1 is along its length
Degree is provided at least three wiring holes 2 on direction, and 1 upper and lower ends of conductive bar are connected to positive DC line 3 and negative DC
On line 4, multiple wiring holes 2 from top to bottom in first be connected to voltmeter 5 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 voltage transformer, this method are as follows: setting conductive bar 1 is from top to bottom
Resistance between first wiring hole 2 and the last one wiring hole 2 is R, appointing before first wiring hole and the last one wiring hole 2
The resistance between a wiring hole is R' one by one, and first wiring hole 2 and the last one wiring hole 2 are close to 1 both ends of conductive bar, conductive bar
Maximum voltage on 1 between first wiring hole 2 and the last one wiring hole 2 is Umax, the voltmeter when the voltage maximum of conductive bar
Test maximum voltage is U'max, U'maxMuch smaller than Umax, U' is determined by scaling methodmaxSize, the electricity of the corresponding one section of connection of R'
The voltage for pressing table actually measured is U', and the voltage passed through between first wiring hole 2 and the last one wiring hole 2 on conductive bar 1 is
U, so that
In formula, k is no-load voltage ratio；
Had by formula (1) deformation
U in formulamaxAnd U'maxIt is known that U' is measured by voltmeter, the voltage U that conductive bar 1 actually passes through can be acquired.
Embodiment 3: the maximum voltage of conductive bar is 10kV, sets on corresponding conductive bar first wiring hole and second connects
It is 100V that the voltmeter of string holes, which measures maximum voltage, then no-load voltage ratio is 100, conductive if the voltage that virtual voltage table measures is 5V
The voltage that item passes through at this time is 10,000 100 × 5=500V of ÷.
Embodiment 4: the maximum voltage of conductive bar is 10kV, sets on corresponding conductive bar first wiring hole and second connects
It is 100V that the voltmeter of string holes, which measures maximum voltage, then no-load voltage ratio is 100, conductive if the voltage that virtual voltage table measures is 20V
The voltage that item passes through at this time is 10,000 100 × 20=2000V of ÷.
Embodiment 5: the maximum voltage of conductive bar is 10kV, sets first wiring hole and third on corresponding conductive bar and connects
It is 500V that the voltmeter of string holes, which measures maximum voltage, then no-load voltage ratio is 20, conductive if the voltage that virtual voltage table measures is 20V
The voltage that item passes through at this time is 10,000 500 × 20=400V of ÷.
Embodiment 6: the maximum voltage of conductive bar is 10kV, sets first wiring hole and third on corresponding conductive bar and connects
It is 500V that the voltmeter of string holes, which measures maximum voltage, then no-load voltage ratio is 20, conductive if the voltage that virtual voltage table measures is 50V
The voltage that item passes through at this time is 10,000 500 × 50=1000V 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 voltage 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) upper and lower ends are connected to positive DC line (3) and negative DC line (4)
On, multiple wiring holes (2) from top to bottom in first be connected to voltmeter (5) after any wiring thereafter.
2. a kind of DC voltage 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 |
|---|---|---|---|
| CN201820914454.3U CN208568897U (en) | 2018-06-13 | 2018-06-13 | A kind of DC voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820914454.3U CN208568897U (en) | 2018-06-13 | 2018-06-13 | A kind of DC voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208568897U true CN208568897U (en) | 2019-03-01 |
Family
ID=65486771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820914454.3U Active CN208568897U (en) | 2018-06-13 | 2018-06-13 | A kind of DC voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208568897U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957095A (en) * | 2018-06-13 | 2018-12-07 | 贵州电网有限责任公司 | A kind of DC voltage transformer and its voltage test method |
| CN108957095B (en) * | 2018-06-13 | 2024-07-02 | 贵州电网有限责任公司 | Direct-current voltage transformer and voltage testing method thereof |
-
2018
- 2018-06-13 CN CN201820914454.3U patent/CN208568897U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957095A (en) * | 2018-06-13 | 2018-12-07 | 贵州电网有限责任公司 | A kind of DC voltage transformer and its voltage test method |
| CN108957095B (en) * | 2018-06-13 | 2024-07-02 | 贵州电网有限责任公司 | Direct-current voltage transformer and voltage testing method thereof |
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