CN103278735A - Multi-function loop tester of three-phase transformer CT (Current Transformer) - Google Patents
Multi-function loop tester of three-phase transformer CT (Current Transformer) Download PDFInfo
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- CN103278735A CN103278735A CN2013101513128A CN201310151312A CN103278735A CN 103278735 A CN103278735 A CN 103278735A CN 2013101513128 A CN2013101513128 A CN 2013101513128A CN 201310151312 A CN201310151312 A CN 201310151312A CN 103278735 A CN103278735 A CN 103278735A
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Abstract
The invention relates to a multi-function loop tester of a three-phase transformer CT (Current Transformer). The multi-function loop tester comprises a primary-side test terminal and a secondary-side test terminal, wherein the primary-side test terminal and the secondary-side test terminal are respectively connected to the primary side and the secondary side of the three-phase transformer, and the primary-side test terminal is electrically connected with the secondary-side test terminal. The primary-side test terminal is composed of a primary-side polarity test module, a primary-side switcher and a three-phase current inductor. The secondary-side test terminal is composed of test terminal blocks, a secondary-side switcher and a secondary-side polarity test module, and the number of the test terminal blocks is six, and the test terminal blocks are respectively connected with the secondary-side switcher. The multi-function loop tester concentrates front and rear switch cabinet working equipment of a polarity test and a loop resistance test into a set of devices in front of a switch cabinet, workers after the switch cabinet are only responsible for the wiring work of a primary three-phase CT and do not need to cooperate with worker before the switch cabinet to operate, and the working strength is reduced.
Description
Technical field
The invention belongs to relay protection test apparatus field, especially a kind of Multifunctional three-phase transformer CT loop-around test instrument.
Background technology
In order to which whether the polarity for verifying CT secondary circuits is correct, the polarity test work of bis- bulk loops of CT is carried out generally before protective relaying device puts into operation.Test job is common with two groups of staff to be completed, one of which personnel are responsible for the wiring of CT primary sides and the break-make work of dc source after switch cubicle, another a group of people is responsible for the wiring of CT secondary circuits and the reading for the pointer for observing test instrumentation before switch cubicle, and the correctness that CT secondary circuits are just playing polarity is judged with counter by observing just rising for pointer.
After the completion of CT polarity tests, switch cubicle previous group personnel need to check whether CT secondary circuits other parts have connected reliability, after inspection is errorless, disconnect the link plate of CT testing terminals, using instrument for measuring DC resistance to resistance is tested on the disk of CT secondary circuits, under disk, test event include three-phase between and ground wire six loop-around tests, judge whether loop resistance qualified according to reading, whether CT secondary circuits are complete, and connection is reliable.
Need to test each phase CT secondary circuit in above-mentioned detection process, therefore the wiring repeated on the secondary circuits of CT mono- is needed to work, intricate operation is repeated, and the measurement place of the primary circuit and secondary circuit due to CT is not often in same place, generally require to propaganda directed to communicate or linked up by intercom in work, the problem of existence information exchange is inaccurate, easily influences job schedule and work quality.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art part, there is provided a kind of Multifunctional three-phase transformer CT loop-around test instrument for testing CT polarity tests and CT loop resistances.
The technical solution adopted by the present invention is：
A kind of Multifunctional three-phase transformer CT loop-around test instrument, including a side test terminal and secondary side test terminal, side test terminal and secondary side test terminal are connected in the primary side and secondary side of three-phase transformer respectively, Electricity Federation between side test terminal and secondary side test terminal, wherein：
Side test terminal is made up of primary side polarity test module, primary side switch and three-phase current inductor；
Secondary side test terminal is by test connection terminal, secondary side switch and secondary side polarity test module, and test connection terminal is six and coupled respectively with secondary side switch.
Moreover, being connected with dc source on the secondary side switch.
Moreover, the secondary side test terminal also includes D.C. resistance test module.
Moreover, also integrally disposed in the secondary side test terminal have data read module and storage medium, data read module is used to couple display screen, and storage medium is used to recording and/or exporting test data.
Moreover, the coupling method of above-mentioned Multifunctional three-phase transformer CT loop-around tests instrument test loop polarity is：
(1) the primary side test module input couples with the primary side of three-phase transformer, primary side test module output end couples with the input of primary side switch, input of the primary side switch respectively with three-phase current inductor couples, primary side switch can be turned on separately with each three-phase current inductor, and the output end of three-phase current inductor is coupled by cable with secondary side test terminal respectively；
(2) the output end of the three-phase current inductor is coupled with three test connection terminals respectively by cable, the other three test connection terminal is coupled by threephase cable with secondary side test module input respectively, and the connection of secondary side test module input couples with the secondary side output end of three-phase transformer.
Moreover, the coupling method of above-mentioned Multifunctional three-phase transformer CT loop-around tests instrument test loop D.C. resistance is：
Input of the six test connection terminals of the secondary side test terminal respectively with D.C. resistance test module couples, respectively formed disk on and disk under loop, the output end of D.C. resistance test module couples with the secondary side of three-phase transformer, and dc source is connected on secondary side switch.
Moreover, the conducting of the primary side switch and the input of three-phase current inductor is controlled using wireless remote control technology.
Advantages and positive effects of the present invention are：
1st, this multi-functional loop-around test instrument focuses on the front-rear switch cabinet working equipment that polarity test and loop resistance are tested in one before switch cubicle group of device, personnel are only responsible for three-phase CT wiring work after switch cubicle, without carrying out compounding practice, the working strength of reduction with personnel before switch cubicle；The communication number of times of two groups of personnel is reduced, the accuracy of single work is improved, improves operating efficiency and working effect.
2nd, this multi-functional loop-around test instrument includes a side test terminal and secondary side test terminal, it is located at the primary side and secondary side of three-phase transformer respectively, the conducting of primary side switch and the input of three-phase current inductor is controlled using wireless remote control technology, highly versatile, is suitable for the condition of work of most of indoor and outdoor equipment.
3rd, originally multi-functional loop-around test instrument is also integrally disposed data read module and storage medium, can store test data, test data be analyzed and generated test report after convenient experiment, value-added content of product is which thereby enhanced, with good promotional value.
Brief description of the drawings
Fig. 1 is the side test terminal and the connection schematic diagram of secondary side test terminal in the present invention；
Fig. 2 couples schematic diagram for secondary side test terminal and three-phase transformer secondary side in the present invention.
Embodiment
Below in conjunction with the accompanying drawings and the invention will be further described by specific embodiment, following examples are descriptive, are not limited, it is impossible to limit protection scope of the present invention with this.
A kind of Multifunctional three-phase transformer CT loop-around test instrument, including a side test terminal and secondary side test terminal, side test terminal is located at the primary side of three-phase transformer, secondary side test terminal is located at the secondary side of three-phase transformer, Electricity Federation between side test terminal and secondary side test terminal, thus personnel are only responsible for three-phase CT wiring work after switch cubicle, without carrying out compounding practice with personnel before switch cubicle, the test of CT loop polarities can be tested after side test terminal and the connection of secondary side test terminal, its connecting mode is：
Side test terminal is made up of primary side polarity test module, primary side switch and three-phase current inductor 1, primary side test module input couples with the primary side of three-phase transformer, primary side test module output end couples with the input of primary side switch, input of the primary side switch respectively with three-phase current inductor couples, primary side switch can be turned on separately with each three-phase current inductor, and the output end of three-phase current inductor is coupled by cable 2 with secondary side test terminal respectively；
Secondary side test terminal includes test connection terminal 3, secondary side switch, threephase cable, secondary side polarity test module and dc source, test connection terminal is six and coupled respectively with secondary side switch, the output end of three-phase current inductor is coupled with three test connection terminals respectively by cable, the other three test connection terminal is coupled by threephase cable with secondary side test module input respectively, the connection of secondary side test module input couples with the secondary side output end of three-phase transformer, and dc source is connected with secondary side switch.
Secondary side test terminal can test CT loops D.C. resistance, and its connecting mode is：
Secondary side test terminal also includes D.C. resistance test module, input of the six test connection terminals of secondary side test terminal respectively with D.C. resistance test module couples, respectively formed disk on and disk under loop, the output end of D.C. resistance test module couples with the secondary side of three-phase transformer, and dc source is connected on secondary side switch.
In the present embodiment, the conducting of primary side switch and the input of three-phase current inductor is controlled using wireless remote control technology, and because wireless remote control technology is prior art, therefore it will not go into details in the present invention.
It is also integrally disposed in secondary side test terminal to have data read module and storage medium in the present embodiment（Not shown in accompanying drawing）, data read module is for coupling display screen, and storage medium is for recording and/or exporting test data.
Claims (7)
1. a kind of Multifunctional three-phase transformer CT loop-around test instrument, it is characterised in that：Including a side test terminal and secondary side test terminal, a side test terminal and secondary side test terminal are connected in the primary side and secondary side of three-phase transformer respectively, Electricity Federation between a side test terminal and secondary side test terminal, wherein：
Side test terminal is made up of primary side polarity test module, primary side switch and three-phase current inductor；
Secondary side test terminal is tried by test connection terminal, secondary side switch and secondary side polarity test module, is tested binding post for six and is coupled respectively with secondary side switch.
2. Multifunctional three-phase transformer CT loop-around test instrument according to claim 1, it is characterised in that：Dc source is connected with the secondary side switch.
3. Multifunctional three-phase transformer CT loop-around test instrument according to claim 1, it is characterised in that：The secondary side test terminal also includes D.C. resistance test module.
4. Multifunctional three-phase transformer CT loop-around test instrument according to claim 1, it is characterised in that：Also integrally disposed in the secondary side test terminal to have data read module and storage medium, data read module is used to couple display screen, and storage medium is used to recording and/or exporting test data.
5. a kind of coupling method of Multifunctional three-phase transformer CT loop-around tests instrument test loop polarity as claimed in claim 1, it is characterised in that：Its step is：
(1) the primary side test module input couples with the primary side of three-phase transformer, primary side test module output end couples with the input of primary side switch, input of the primary side switch respectively with three-phase current inductor couples, primary side switch can be turned on separately with each three-phase current inductor, and the output end of three-phase current inductor is coupled by cable with secondary side test terminal respectively；
(2) the output end of the three-phase current inductor is coupled with three test connection terminals respectively by cable, the other three test connection terminal is coupled by threephase cable with secondary side test module input respectively, and the connection of secondary side test module input couples with the secondary side output end of three-phase transformer.
6. a kind of coupling method of Multifunctional three-phase transformer CT loop-around tests instrument test loop D.C. resistance as claimed in claim 3, it is characterised in that：Input of the six test connection terminals of the secondary side test terminal respectively with D.C. resistance test module couples, respectively loop on formation disk and under disk, and the output end of D.C. resistance test module couples with the secondary side of three-phase transformer.
7. a kind of coupling method of Multifunctional three-phase transformer CT loop-around tests instrument test loop polarity according to claim 5, it is characterised in that：The conducting of the primary side switch and the input of three-phase current inductor is controlled using wireless remote control technology.
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| CN201310151312.8A CN103278735B (en) | 2013-04-27 | 2013-04-27 | Multifunctional three-phase transformer CT loop-around test instrument |
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| CN201310151312.8A CN103278735B (en) | 2013-04-27 | 2013-04-27 | Multifunctional three-phase transformer CT loop-around test instrument |
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| CN103278735B CN103278735B (en) | 2015-09-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035061A (en) * | 2014-05-30 | 2014-09-10 | 国家电网公司 | Voltage transformer fault simulation practical training device |
| CN110764042A (en) * | 2019-12-03 | 2020-02-07 | 天津送变电工程有限公司 | Polarity tester for secondary circuit of remote multifunctional mutual inductor |
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| JPS5624588A (en) * | 1979-08-03 | 1981-03-09 | Toshiba Corp | Polarity detector for current transformer |
| JPH08122387A (en) * | 1994-10-20 | 1996-05-17 | Toshiba Corp | Method and apparatus for testing polarity of current transformer |
| JP2004069303A (en) * | 2002-08-01 | 2004-03-04 | Kawamura Electric Inc | Polarity inspecting apparatus of current transformer |
| CN101251569A (en) * | 2008-04-01 | 2008-08-27 | 山东电力研究院 | Method for testing electric secondary AC loop |
| CN102095991A (en) * | 2009-12-15 | 2011-06-15 | 西安爱邦电气有限公司 | CT (Current Transformer) loop wiring inspection and judgment method of double-winding conventional transformer |
| CN102096014A (en) * | 2009-12-15 | 2011-06-15 | 西安爱邦电气有限公司 | Method for analyzing wiring correctness of CT return circuit of four-winding autotransformer |
| CN202486254U (en) * | 2012-03-14 | 2012-10-10 | 山西省电力公司电力科学研究院 | Secondary circuit detection system of current mutual inductor |
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2013
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| JPS5624588A (en) * | 1979-08-03 | 1981-03-09 | Toshiba Corp | Polarity detector for current transformer |
| JPH08122387A (en) * | 1994-10-20 | 1996-05-17 | Toshiba Corp | Method and apparatus for testing polarity of current transformer |
| JP2004069303A (en) * | 2002-08-01 | 2004-03-04 | Kawamura Electric Inc | Polarity inspecting apparatus of current transformer |
| CN101251569A (en) * | 2008-04-01 | 2008-08-27 | 山东电力研究院 | Method for testing electric secondary AC loop |
| CN102095991A (en) * | 2009-12-15 | 2011-06-15 | 西安爱邦电气有限公司 | CT (Current Transformer) loop wiring inspection and judgment method of double-winding conventional transformer |
| CN102096014A (en) * | 2009-12-15 | 2011-06-15 | 西安爱邦电气有限公司 | Method for analyzing wiring correctness of CT return circuit of four-winding autotransformer |
| CN202486254U (en) * | 2012-03-14 | 2012-10-10 | 山西省电力公司电力科学研究院 | Secondary circuit detection system of current mutual inductor |
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| 王婷婷等: "检查电流互感器二次回路的新方法探讨", 《水电站设计》, vol. 28, no. 3, 30 September 2012 (2012-09-30), pages 78 - 79 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035061A (en) * | 2014-05-30 | 2014-09-10 | 国家电网公司 | Voltage transformer fault simulation practical training device |
| CN110764042A (en) * | 2019-12-03 | 2020-02-07 | 天津送变电工程有限公司 | Polarity tester for secondary circuit of remote multifunctional mutual inductor |
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| CN103278735B (en) | 2015-09-02 |
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