CN203287467U - Transformation ratio and polarity testing apparatus for voltage transformer - Google Patents
Transformation ratio and polarity testing apparatus for voltage transformer Download PDFInfo
- Publication number
- CN203287467U CN203287467U CN2013203135764U CN201320313576U CN203287467U CN 203287467 U CN203287467 U CN 203287467U CN 2013203135764 U CN2013203135764 U CN 2013203135764U CN 201320313576 U CN201320313576 U CN 201320313576U CN 203287467 U CN203287467 U CN 203287467U
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- voltage transformer
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Abstract
The utility model discloses a transformation ratio and polarity testing apparatus for a voltage transformer. The testing apparatus comprises an air switch. One end of the air switch is connected between a live wire and a zero line, the other end of the air switch is connected with a voltage regulator, one end of the voltage regulator is connected with a wire A630 and the other end of the voltage regulator is connected with a wire N 630. A first voltmeter is connected between the wire A630 and the wire N630 and a second voltmeter is connected between a wire L630 and the wire N630. The apparatus provided by the utility model can rapidly test polarity and transformation ratio of the voltage transformer.
Description
Technical field
The utility model belongs to electric field, particularly a kind of voltage transformer (VT) no-load voltage ratio polarity test device.
Background technology
In factory's high voltage power distribution; voltage transformer (VT) is applied in widely and detects in metering and protection; for various application provide most basic data, regulation in " GB50150-2006 Erection works of electrical installations Standard for handover test of electric equipment ", voltage transformer (VT) must carry out the test of no-load voltage ratio and polarity.Voltage transformer (VT) is the equipment that directly with bus, is connected, and has very large danger.At first the polarity wiring error of voltage transformer secondary side three-phase easily causes measurement and protects inaccurate, serious even equipment short circuit blast, brings very serious consequence; Secondly low-voltage and open delta misoperation during the no-load voltage ratio of voltage transformer (VT) and incorrect polarity easily cause protecting, bring unnecessary loss.
In realizing process of the present utility model, find in prior art to exist at least following shortcoming and defect:
In voltage transformer (VT) commissioning test in complete high-voltage board, in inboard, the verification of taking out stitches is extremely difficult, but also must individually to it, test due to the wiring of voltage transformer (VT), therefore can't test rapidly polarity and no-load voltage ratio.
The utility model content
The utility model provides a kind of voltage transformer (VT) no-load voltage ratio polarity test device, and the utility model has been realized rapidly polarity and the no-load voltage ratio of voltage transformer (VT) being tested, and is described below:
A kind of voltage transformer (VT) no-load voltage ratio polarity test device comprises: air switch, and an end of described air switch is connected between live wire and zero line, another termination pressure regulator of described air switch; One terminated line A630 of described pressure regulator, the other end wiring N630 of described pressure regulator; Connect the first voltage table between described line A630 and described line N630; Connect the second voltage table between online L630 and described line N630.
Described proving installation also comprises: power light, described power light are connected between described live wire and described zero line.
The beneficial effect of the technical scheme that the utility model provides is: the magnitude of voltage that shows by observing the first voltage table PV_OUT and second voltage table PV_IN can detect voltage transformer (VT) and no-load voltage ratio incorrect polarity problem whether occur; Realized rapidly polarity and the no-load voltage ratio of voltage transformer (VT) being tested, avoided complicated and the loaded down with trivial details work of taking out stitches.
Description of drawings
The major loop schematic diagram of the voltage transformer (VT) that Fig. 1 provides for prior art;
The circuit diagram of the opening voltage that Fig. 2 provides for prior art;
The star that Fig. 3 provides for prior art connects the circuit diagram of voltage;
The first polar plot of the star connection circuit figure that Fig. 4 provides for prior art;
The second polar plot of the star connection circuit figure that Fig. 5 provides for prior art;
The structural representation of the voltage transformer (VT) no-load voltage ratio polarity test device that Fig. 6 provides for the utility model;
Opening polar plot after the line A630 that Fig. 7 provides for the utility model, line B630 and line C630 short circuit;
Circuit diagram after the line A630 that Fig. 8 provides for the utility model, line B630 and line C630 short circuit.
Shown in accompanying drawing, components listed is listed as follows:
K: air switch; L: live wire;
N: zero line; T: pressure regulator;
PV_OUT: the first voltage table; PV_IN: second voltage table;
HR: power light.
Embodiment
, for making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
In order to realize rapidly polarity and the no-load voltage ratio of voltage transformer (VT) being tested, avoid taking out stitches, the utility model embodiment has proposed a kind of voltage transformer (VT) no-load voltage ratio polarity test device, and is described below:
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the type of general voltage transformer (VT) is that 10/ √ 3,0.1/ √ 3 and other similar voltage transformer (VT) of 0.1/3(also can adopt this proving installation), as can be seen from the figure, the mode of connection that star meets side line A630, line B630 and line C630 is that a draws, and the n three-phase is shorted together and forms line N630; And opening voltage to be three coil da and dn join end to end, last extension line L630 and line N630, form opening voltage.When line A630, line B630 electrical network suitable for line C630 three normally moved, the TV transformer polarity connection was correct, three-phase equilibrium, therefore the vector of three-phase is zero, the voltage between opening pressure-wire L630 and line N630 is zero in theory.
Referring to Fig. 6, a kind of voltage transformer (VT) no-load voltage ratio polarity test device comprises: air switch K, the end of air switch K are connected between live wire L and zero line N, another termination pressure regulator T of air switch K; The terminated line A630 of pressure regulator T, the other end wiring N630 of pressure regulator T; Connect the first voltage table PV_OUT between online A630 and line N630; Connect second voltage table PV_IN between online L630 and line N630.
Further, in order to show whether electricity is arranged, this proving installation also comprises: power light HR, power light HR are connected between live wire L and zero line N.
During specific implementation, the model of pressure regulator T can be 1KVA50HZ, 220V; The model of air switch K is the 2P type; The model of the first voltage table PV_OUT and second voltage table PV_IN is 400V.
Can obtain the no-load voltage ratio of voltage transformer (VT) by the voltage ratio of the first voltage table PV_OUT and second voltage table PV_IN.
A kind of workflow of voltage transformer (VT) no-load voltage ratio polarity test device under the following detailed description, described below:
Referring to Fig. 7 and Fig. 8, can know by above principle, for no-load voltage ratio and the polarity of testing threephase potential transformer, the line A630 that star can be connect, line B630 and line C630 short circuit.At this moment, vector ABC equal and opposite in direction direction is identical, belongs to same vector.In the open side reaction should be also that three vector equal and opposite in direction directions of abc are identical; Supposition polarity is correct now, and these three vectors superpose.
therefore, during practical application, the equal short circuit of A630 B630 C630 before two outlet end line A630(test of this device) be connected with line N630 with the line A630 of tested voltage transformer (VT) with line N630, two outlet end line L630 of this device are connected with line N630 with the line L630 of tested voltage transformer (VT) with line N630, start from scratch and regulate individual event pressure regulator T, when voltage table PV_OUT shows 57.73V, the voltage that the abc three-phase obtains is all 33.33, because direction is identical, if polarity is correct, the demonstration of PV_IN voltage table is approximately 100V, be line L630 line N630 record opening voltage and be approximately 100V.
When the demonstration of PV_IN voltage table was not 100V, the polarity malunion of expression abc three-phase was true.At this moment, the line A630 that star can be connect and line B630 short circuit, then, according to above-mentioned description, connect successively, test PV_IN voltage table shows whether be 66.66V, by that analogy, can obtain polarity and make mistakes there.
In sum, the utility model embodiment provides a kind of voltage transformer (VT) no-load voltage ratio polarity test device,, by observing the magnitude of voltage of the first voltage table PV_OUT and second voltage table PV_IN output, can detect that and polarity problems occur mutually, and obtain no-load voltage ratio; Realized rapidly polarity and the no-load voltage ratio of voltage transformer (VT) being tested, avoided taking out stitches.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (2)
1. a voltage transformer (VT) no-load voltage ratio polarity test device, is characterized in that, comprising: air switch, and an end of described air switch is connected between live wire and zero line, another termination pressure regulator of described air switch; One terminated line A630 of described pressure regulator, the other end wiring N630 of described pressure regulator; Connect the first voltage table between described line A630 and described line N630; Connect the second voltage table between online L630 and described line N630.
2. a kind of voltage transformer (VT) no-load voltage ratio polarity test device according to claim 1, is characterized in that, described proving installation also comprises: power light, described power light are connected between described live wire and described zero line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203135764U CN203287467U (en) | 2013-05-31 | 2013-05-31 | Transformation ratio and polarity testing apparatus for voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203135764U CN203287467U (en) | 2013-05-31 | 2013-05-31 | Transformation ratio and polarity testing apparatus for voltage transformer |
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| Publication Number | Publication Date |
|---|---|
| CN203287467U true CN203287467U (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013203135764U Expired - Fee Related CN203287467U (en) | 2013-05-31 | 2013-05-31 | Transformation ratio and polarity testing apparatus for voltage transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104820161A (en) * | 2015-05-21 | 2015-08-05 | 国家电网公司 | Multi-tap current transformer secondary wiring detection device |
| WO2016026231A1 (en) * | 2014-08-22 | 2016-02-25 | 江苏省电力公司常州供电公司 | Intelligent polarity detection apparatus and method for four-star type voltage transformer |
| CN108226845A (en) * | 2017-12-21 | 2018-06-29 | 中冶天工集团有限公司 | A kind of test method of voltage transformer angular aperture |
-
2013
- 2013-05-31 CN CN2013203135764U patent/CN203287467U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016026231A1 (en) * | 2014-08-22 | 2016-02-25 | 江苏省电力公司常州供电公司 | Intelligent polarity detection apparatus and method for four-star type voltage transformer |
| CN104820161A (en) * | 2015-05-21 | 2015-08-05 | 国家电网公司 | Multi-tap current transformer secondary wiring detection device |
| CN104820161B (en) * | 2015-05-21 | 2017-11-07 | 国家电网公司 | A kind of multi-tap secondary wiring of current mutual inductor detection means |
| CN108226845A (en) * | 2017-12-21 | 2018-06-29 | 中冶天工集团有限公司 | A kind of test method of voltage transformer angular aperture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN XINBIN ENGINEERING TECHNOLOGY MONITORING C Free format text: FORMER OWNER: TIANJIN MCC20 CONSTRUCTION CO., LTD. Effective date: 20150713 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150713 Address after: 300301, room 2284-101, building A, China Merchants Road, No. ten bridge, Dongli District, Tianjin Patentee after: Tianjin Xinbin Engineering Technology Monitoring Co., Ltd. Address before: 300301 Tianjin Dongli District flawless Street Patentee before: Tianjin MCC20 Construction Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20200531 |