CN201532455U - Transformation-ratio electric bridge calibrating device - Google Patents
Transformation-ratio electric bridge calibrating device Download PDFInfo
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- CN201532455U CN201532455U CN2009202200628U CN200920220062U CN201532455U CN 201532455 U CN201532455 U CN 201532455U CN 2009202200628 U CN2009202200628 U CN 2009202200628U CN 200920220062 U CN200920220062 U CN 200920220062U CN 201532455 U CN201532455 U CN 201532455U
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- transformation
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- load voltage
- electric bridge
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Abstract
The utility model provides a transformation-ratio electric bridge calibrating device comprising a self-coupling transformer, a standard voltage transformer and a voltage meter, wherein the self-coupling transformer and the standard voltage transformer are electrically connected to form a transformation-ratio device with adjustable proportion of input voltage and output voltage; and the voltage meter is electrically connected with the transformation-ratio device so as to be suitable for carrying out measurement on the transformation ratio of the transformation-ratio device. The transformation-ratio electric bridge calibrating device utilizes the continuous adjustability of the self-coupling transformer and isolation of the input voltage and the output voltage of the voltage transformer to realize continuous adjustment of large-ratio voltage and accurate measurement of the transformation-ratio of the transformation-ratio electric bridge, lead the transformation-ratio value to be adjusted randomly and overcome the problem that in the standard voltage transformer with fixed transformation-ratio value of the prior art, the transformation-ratio value range thereof is more limited and can not meet the calibration of a large-ratio-value transformation-ratio electric bridge.
Description
Technical field
The utility model relates to detection range, in particular to a kind of no-load voltage ratio bridge calibration device.
Background technology
Specified in the existing national verification rules is the standard ratio device to no-load voltage ratio electric bridge no-load voltage ratio measuring method accepted standard utensil.For no-load voltage ratio be 100,
110,220,380,
100,
250,440 standard potential transformer, the ratio of its no-load voltage ratio are 1.73,3.8,7.61 or the like, and the ratio of its no-load voltage ratio is a fixed value, can't satisfy the calibration of 1: 2000 big ratio of no-load voltage ratio electric bridge.
In realizing the utility model process, the inventor finds the fixing standard potential transformer of no-load voltage ratio value in the prior art, and its no-load voltage ratio numerical range is comparatively limited, can't satisfy the calibration of big ratio no-load voltage ratio electric bridge.
The utility model content
The utility model aims to provide a kind of no-load voltage ratio bridge calibration device, can solve the fixing standard potential transformer of no-load voltage ratio value in the prior art, and its no-load voltage ratio numerical range is comparatively limited, can't satisfy the problem of the calibration of big ratio no-load voltage ratio electric bridge.
In embodiment of the present utility model, a kind of no-load voltage ratio bridge calibration device is provided, comprising: autotransformer, standard potential transformer and voltage table, wherein
Autotransformer is electrically connected the no-load voltage ratio device of forming input voltage and output voltage adjustable ratio with standard potential transformer;
Voltage table is electrically connected with the no-load voltage ratio device, is suitable for the no-load voltage ratio of no-load voltage ratio device is measured.
Preferably, in above-mentioned no-load voltage ratio bridge calibration device, voltage table is a digital voltmeter.
In the above-described embodiments, utilize the isolation of the continuous adjustability of autotransformer and mutual induction of voltage input voltage and output voltage, realized greatly the accurate measurement that can be in harmonious proportion no-load voltage ratio electric bridge no-load voltage ratio continuously than threshold voltage, make can the setting up arbitrarily of no-load voltage ratio value, overcome the fixing standard potential transformer of no-load voltage ratio value in the prior art, its no-load voltage ratio numerical range is comparatively limited, can't satisfy the problem of the calibration of big ratio no-load voltage ratio electric bridge.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 shows the no-load voltage ratio bridge calibration device synoptic diagram according to an embodiment of the utility model.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Fig. 1 shows the no-load voltage ratio bridge calibration device synoptic diagram according to an embodiment of the utility model, comprising: autotransformer 10, standard potential transformer 20 and voltage table 30, wherein
Voltage table 30 is electrically connected with the no-load voltage ratio device, is suitable for the no-load voltage ratio of no-load voltage ratio device is measured.
In the present embodiment, utilize the isolation of the continuous adjustability of autotransformer and mutual induction of voltage input voltage and output voltage, realized greatly the accurate measurement that can be in harmonious proportion no-load voltage ratio electric bridge no-load voltage ratio continuously than threshold voltage, make can the setting up arbitrarily of no-load voltage ratio value, overcome the fixing standard potential transformer of no-load voltage ratio value in the prior art, its no-load voltage ratio numerical range is comparatively limited, can't satisfy the problem of the calibration of big ratio no-load voltage ratio electric bridge.
Preferably, in above-mentioned no-load voltage ratio bridge calibration device, voltage table is a digital voltmeter, adopts digital voltmeter to improve the precision of measuring.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (2)
1. a no-load voltage ratio bridge calibration device is characterized in that, comprising: autotransformer, standard potential transformer and voltage table, wherein
Described autotransformer is electrically connected the no-load voltage ratio device of forming input voltage and output voltage adjustable ratio with described standard potential transformer;
Described voltage table is electrically connected with described no-load voltage ratio device, is suitable for the no-load voltage ratio of described no-load voltage ratio device is measured.
2. no-load voltage ratio bridge calibration device according to claim 1 is characterized in that described voltage table is a digital voltmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202200628U CN201532455U (en) | 2009-10-23 | 2009-10-23 | Transformation-ratio electric bridge calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202200628U CN201532455U (en) | 2009-10-23 | 2009-10-23 | Transformation-ratio electric bridge calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201532455U true CN201532455U (en) | 2010-07-21 |
Family
ID=42527858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202200628U Expired - Lifetime CN201532455U (en) | 2009-10-23 | 2009-10-23 | Transformation-ratio electric bridge calibrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201532455U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487687A (en) * | 2013-09-21 | 2014-01-01 | 国网吉林省电力有限公司电力科学研究院 | Nonstandard variable ratio voltage transformer calibrating method |
-
2009
- 2009-10-23 CN CN2009202200628U patent/CN201532455U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487687A (en) * | 2013-09-21 | 2014-01-01 | 国网吉林省电力有限公司电力科学研究院 | Nonstandard variable ratio voltage transformer calibrating method |
| CN103487687B (en) * | 2013-09-21 | 2015-04-01 | 国网吉林省电力有限公司电力科学研究院 | Nonstandard variable ratio voltage transformer calibrating method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100721 |