CN103616657A - Method for testing single-interval current transformer - Google Patents
Method for testing single-interval current transformer Download PDFInfo
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- CN103616657A CN103616657A CN201310627941.3A CN201310627941A CN103616657A CN 103616657 A CN103616657 A CN 103616657A CN 201310627941 A CN201310627941 A CN 201310627941A CN 103616657 A CN103616657 A CN 103616657A
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- current transformer
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- phase current
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Abstract
A method for testing a single-interval current transformer includes the following steps of under the condition that the current transformer carries all secondary loop currents, switching on a grounding isolation switch on the side of the single-interval current transformer, adding an A-phase current, a B-phase current and a C-phase current of a three-phase current generator to a position A, a position B and a position C on the side of a breaker of the current transformer respectively, enabling an N-phase current to be grounded, enabling the A-phase current, the B-phase current and the C-phase current to pass through the three-phase current transformer, and simulating the current condition in a loop in the actual running process of the device, wherein the position A, the position B and the position C are isolated; testing secondary current numerical values of the current transformer in the position of a protection device or the position of a measurement device or the position of a metering device through a tester, and determining the no-load voltage ratio of the current transformer and secondary circuit wiring of the current transformer to be correct if the numerical values meet the no-load voltage ratio error requirement. According to the method, the secondary circuit polarity, the no-load voltage ratio and the correctness of the secondary circuit wiring of the three-phase-current transformer can be simultaneously tested, and it is ensured that the electrical device can be reliably put into operation.
Description
Technical field
The present invention relates to the test method of a kind of monospace current transformer.
Background technology
Transformer station is the important pivot of high-voltage fence; and current transformer is requisite primary equipment in transformer station; conventional current mutual inductor converts the primary current of bigger numerical to secondary current that numerical value is less by electromagnetic induction principle, be used for to primary equipment protect, measure, metering etc.In operational process, for the safety of equipment will prevent Current Transformer Secondary open circuit, and the polarity of current transformer, no-load voltage ratio etc. play an important role for the correct realization of the functions such as protection, measurement, metering.Monospace current transformer primary current check is mainly the integrality that checks current transformer polarity, no-load voltage ratio and secondary circuit, prevent secondary circuit open circuit, but cannot check polarity, the no-load voltage ratio of each current transformer, the correctness of circuit connection by primary current in practice.
Summary of the invention
The present invention is the test method that a kind of monospace current transformer will be provided, and solves the problem that causes it not put into operation in time due to the too small phase test of cannot loading of light load equipment secondary current after power transmission.
The test method of the monospace current transformer the present invention relates to, its step is as follows:
1, in the whole secondary loop current situations of current transformer band, monospace current transformer side earthing isolator closes, three-phase current generator A, B, C three-phase current are added in respectively to current transformer isolating switch side A, B, the C place at this interval, N phase ground connection, three-phase current is by threephase current transformer, current conditions in loop while simulating equipment actual motion;
2, testing crew is checked each Current Transformer Secondary current values at protection, measurement or measuring apparatus place, and as numerical value meets ratio error requirement, this current transformer ratio and secondary circuit wiring are correct; As numerical value meets ratio error requirement, this current transformer ratio and secondary circuit wiring are correct.
The invention has the beneficial effects as follows: the correctness that can simultaneously check threephase current transformer secondary circuit polarity, no-load voltage ratio and two your circuit connections, work efficiency and quality inspection have been improved, find early the problem existing in current transformer and secondary circuit, guaranteed that electrical equipment reliably puts into operation.
Accompanying drawing explanation
Fig. 1 is wiring diagram of the present invention.
Embodiment
As shown in Figure 1, step of the present invention is as follows:
1, in the whole secondary loop current situations of current transformer band, monospace current transformer side earthing isolator closes, three-phase current generator A, B, C three-phase current are added in respectively to current transformer isolating switch side A, B, the C place at this interval, N phase ground connection, three-phase current is by threephase current transformer, current conditions in loop while simulating equipment actual motion;
2, testing crew is checked each Current Transformer Secondary current values at protection, measurement or measuring apparatus place, and as numerical value meets ratio error requirement, this current transformer ratio and secondary circuit wiring are correct; As numerical value meets ratio error requirement, this current transformer ratio and secondary circuit wiring are correct.
Claims (1)
1. the test method of monospace current transformer, is characterized in that step is as follows:
(1), in the whole secondary loop current situations of current transformer band, monospace current transformer side earthing isolator closes, three-phase current generator A, B, C three-phase current are added in respectively to current transformer isolating switch side A, B, the C place at this interval, N phase ground connection, three-phase current is by threephase current transformer, current conditions in loop while simulating equipment actual motion;
(2) testing crew is checked each Current Transformer Secondary current values at protection, measurement or measuring apparatus place, and as numerical value meets ratio error requirement, this current transformer ratio and secondary circuit wiring are correct; As numerical value meets ratio error requirement, this current transformer ratio and secondary circuit wiring are correct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310627941.3A CN103616657A (en) | 2013-12-02 | 2013-12-02 | Method for testing single-interval current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310627941.3A CN103616657A (en) | 2013-12-02 | 2013-12-02 | Method for testing single-interval current transformer |
Publications (1)
| Publication Number | Publication Date |
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| CN103616657A true CN103616657A (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310627941.3A Pending CN103616657A (en) | 2013-12-02 | 2013-12-02 | Method for testing single-interval current transformer |
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| CN (1) | CN103616657A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501660A (en) * | 2016-11-22 | 2017-03-15 | 国家电网公司东北分部 | Using control two-way current phase and the method for amplitude measurement tranformer protection vector |
| CN110736954A (en) * | 2019-12-06 | 2020-01-31 | 国网江苏省电力有限公司南通供电分公司 | mutual inductor inspection method based on inspection signal injection |
Citations (5)
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|---|---|---|---|---|
| CN101655544A (en) * | 2008-08-20 | 2010-02-24 | 武汉华瑞测控科技有限公司 | Device for measuring and checking errors of digital mutual inductor |
| CN202133724U (en) * | 2011-04-28 | 2012-02-01 | 大连互感器有限公司 | Error test device of zero sequence voltage transformers |
| CN102540001A (en) * | 2012-02-16 | 2012-07-04 | 云南电网公司 | Method of checking alternating current loop of a 500kV transformer substation through carrying out simulated through-type three-phase short circuit |
| CN102608485A (en) * | 2012-03-23 | 2012-07-25 | 云南电网公司 | Detection method for zero-sequence current loops of transformer substations |
| CN102928803A (en) * | 2012-10-18 | 2013-02-13 | 中国电力科学研究院 | Electronic transformer checking device based on synchronization pulse output power supply |
-
2013
- 2013-12-02 CN CN201310627941.3A patent/CN103616657A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101655544A (en) * | 2008-08-20 | 2010-02-24 | 武汉华瑞测控科技有限公司 | Device for measuring and checking errors of digital mutual inductor |
| CN202133724U (en) * | 2011-04-28 | 2012-02-01 | 大连互感器有限公司 | Error test device of zero sequence voltage transformers |
| CN102540001A (en) * | 2012-02-16 | 2012-07-04 | 云南电网公司 | Method of checking alternating current loop of a 500kV transformer substation through carrying out simulated through-type three-phase short circuit |
| CN102608485A (en) * | 2012-03-23 | 2012-07-25 | 云南电网公司 | Detection method for zero-sequence current loops of transformer substations |
| CN102928803A (en) * | 2012-10-18 | 2013-02-13 | 中国电力科学研究院 | Electronic transformer checking device based on synchronization pulse output power supply |
Non-Patent Citations (1)
| Title |
|---|
| 周宝忠 等: "改进的电流互感器试验方法", 《东北电力技术》, no. 5, 20 May 2013 (2013-05-20), pages 38 - 40 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501660A (en) * | 2016-11-22 | 2017-03-15 | 国家电网公司东北分部 | Using control two-way current phase and the method for amplitude measurement tranformer protection vector |
| CN106501660B (en) * | 2016-11-22 | 2019-04-12 | 国家电网公司东北分部 | Utilize the method for control two-way current phase and amplitude measurement tranformer protection vector |
| CN110736954A (en) * | 2019-12-06 | 2020-01-31 | 国网江苏省电力有限公司南通供电分公司 | mutual inductor inspection method based on inspection signal injection |
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Application publication date: 20140305 |
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| RJ01 | Rejection of invention patent application after publication |