CN102944700B - A kind of current transformer characteristic test secondary wiring device - Google Patents
A kind of current transformer characteristic test secondary wiring device Download PDFInfo
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- CN102944700B CN102944700B CN201210422230.8A CN201210422230A CN102944700B CN 102944700 B CN102944700 B CN 102944700B CN 201210422230 A CN201210422230 A CN 201210422230A CN 102944700 B CN102944700 B CN 102944700B
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Abstract
The present invention relates to a kind of current transformer characteristic test secondary wiring device, belong to electric system detection field.The present invention is connected with connection terminal by double-point double-throw switch one end, the other end can be placed in testing terminal or short-circuited terminal, connection terminal is connected with the wire of the extraction of the secondary winding of current transformer, short-circuited terminal ground connection, achieve and do not need wiring can complete switching between " connect test " and " short circuit grounding " two states, greatly reduce and connect thread-changing frequency, simplify test job, simultaneously because double-point double-throw switch can only be one of " connecting test " and " short circuit grounding " two states, so eliminate the potential safety hazard of mutual inductor second open circuit.
Description
Technical field
The present invention relates to a kind of current transformer characteristic test secondary wiring device, belong to electric system detection field.
Background technology
The mode of connection of existing measuring current mutual inductor ratio, volt-ampere, polarity has very large drawback, has had a strong impact on our test efficiency and test mass.When carrying out current transformer characteristic testing experiment, be only connected with tested current transformer one group time pole winding during tester work, and in real work, tested device secondary winding can reach six groups at most.Tester will be tested successively to each group pole winding.When to wherein a certain armature winding energising, other non-tested secondary winding must use shorting stub short circuit in addition.
Such as: when testing 1S, the necessary short circuit of each secondary winding of 2S, 3S, 4S, 5S, 6S, during test 2S, each secondary winding of 1S, 3S, 4S, 5S, 6S must short circuit.So often testing one group of secondary winding must above operation repeatedly.Work together abnormal loaded down with trivial details; Above-mentioned wiring repeatedly at the construction field (site), increases intensity of workers, inefficiency; And, the secondary output line of test apparatus, due to the too high as easy as rolling off a log damage of Reusability frequency and broken string, add the labour intensity of staff, reduce test efficiency, wiring can cause test wire terminal place tired repeatedly simultaneously, causes damage, broken string etc. that Current Transformer Secondary may be caused to open by mistake the potential safety hazard on road.Current Transformer Secondary can be made like this to open a way, be very easy to the tested high-tension apparatus of damage.Potential safety hazard is brought to safety in production.
Chinese invention patent " current transformer polarity tester of neutral point of transformer " (application number: CN200910172240.9) a kind of transformer neutral point current transformer tester, there are four connection terminals this tester inside, a pointer direct current electric current milliammeter A, a test button, there are four test wires outside.Tester of the present invention accurately can check the polarity of transformer neutral point TA Secondary Winding, mistake access when avoiding wiring; Improve transformer reliability of operation, ensure the stable operation of electric system.But the problem of this invention also unresolved frequent wiring.
Summary of the invention:
For the deficiency of background technology, the present invention is connected with connection terminal by double-point double-throw switch one end, the other end can be placed in testing terminal or short-circuited terminal, connection terminal is connected with the wire of the extraction of the secondary winding of current transformer, short-circuited terminal ground connection, achieve and do not need wiring can complete " connecting test ", switching between " short circuit grounding " two states, greatly reduce and connect thread-changing frequency, simplify test job, simultaneously because double-point double-throw switch can only be one of " connecting test " and " short circuit grounding " two states, so eliminate the potential safety hazard of mutual inductor second open circuit.
Technical scheme of the present invention is:
A kind of current transformer characteristic test secondary wiring device, comprise connection terminal, testing terminal, short-circuited terminal and double-point double-throw switch, double-point double-throw switch one end is connected with connection terminal, the other end can be placed in testing terminal or short-circuited terminal, it is characterized in that: connection terminal is connected with the wire of the extraction of the secondary winding of current transformer, short-circuited terminal ground connection.Its beneficial effect is: termination alleviates the labour intensity of test connection, improve test efficiency, reduce and connect thread-changing frequency, thus extend the life-span of connection terminal and test line, evaded the potential safety hazard because the breakdown of test line brings largely; Can connection times be reduced simultaneously, avoid maloperation.
Current transformer characteristic test secondary wiring device as above, is characterized in that: described connection terminal, testing terminal, short-circuited terminal and double-point double-throw switch are respectively N couple, and wherein N is greater than 1.Its beneficial effect is: can test N current transformer simultaneously.
Current transformer characteristic as above test secondary wiring device, is characterized in that: described connection terminal, testing terminal, short-circuited terminal and double-point double-throw switch are respectively 6 right.Its beneficial effect is: can test 6 current transformers simultaneously, meets the requirement of most of current transformer test.
Current transformer characteristic test secondary wiring device as above, is characterized in that: described connection terminal two ends shunt voltage table.Its beneficial effect is: can monitor the tested winding voltage value in process of the test at any time.
Current transformer characteristic test secondary wiring device as above, is characterized in that: described connection terminal two ends series current table.Its beneficial effect is: can monitor the tested winding current values in process of the test at any time.
Accompanying drawing illustrates:
Fig. 1 simplex winding double-pole double-throw switch circuit schematic diagram;
Fig. 2 termination circuit theory diagrams;
Fig. 3 current transformer characteristic test secondary wiring device panel arranges sketch.
Embodiment
For realizing the function of the switching between " connecting test " and " short circuit grounding " two states.For the double-point double-throw switch that each winding is equipped with, as shown in Figure 1: the intermediate terminal of switch is " connection terminal ", wire S1, S2 of the extraction of the secondary winding of current transformer is connected.
When double-point double-throw switch is placed in " testing terminal " shelves, namely corresponding mutual inductor Secondary Winding is connected with tester, enters mutual inductor attribute testing test mode; " testing terminal " is connected with the measurement port of Testing Instrument for Volt-ampere Characteristic; When double-point double-throw switch is placed in " short-circuited terminal " shelves, then the Secondary Winding short circuit ground connection be access in.And by the termination earthing of casing.Be in non-tested state, guarantee the danger not producing mutual inductor second open circuit.
For the testing requirement of the current transformer of many group Secondary Winding, in conjunction with the double-point double-throw switch of simplex winding, N(N can be greater than 1) group single current mutual inductor characteristic test secondary wiring device as shown in Figure 1 carries out composite design, and Fig. 2 is the situation that 6 groups of current transformer characteristics test secondary wiring devices carry out combining.
By controlling the state of double-point double-throw switch K1-K6 corresponding to each secondary terminals, " testing terminal " shelves and " short-circuited terminal " shelves can be selected respectively, reaching tested winding access tester, the object of non-tested winding short circuit ground connection.
As shown in Figure 3, current transformer characteristic test secondary wiring device panel arranges sketch.By changing on off state corresponding to each winding, realize the switching of each winding " input is logical " and " short circuit is led to ", by corresponding winding access tester test port during " input is logical " state, by corresponding winding short circuit ground connection during " short circuit is led to " state.The panel of termination also has " voltage table ", " reometer " connection terminal, respectively in parallel with " instrument secondary input terminal ", connect, by access corresponding instrument, the tested winding voltage current value at any time in supervision process of the test.Experiment power supply, by the power switch access tester on termination panel, when abnormal reading appears in monitoring reometer, voltage table, can, immediately by the power switch deenergization on panel, prevent from burning out tested winding.During work, the two ends of current transformer 6 Secondary Winding are connected on termination " 1S1-1S2 " respectively, " 2S1-2S2 ", " 3S1-3S2 ", " 4S1-4S2 ", " 5S1-5S2 ", " on " 6S1-6S2 " connection terminal; be adjusted to by switch corresponding for tested winding " input is logical ", other switches are positioned at " short circuit is led to ".Voltage table, the reometer of corresponding range is accessed respectively at voltage table, reometer terminal." instrument secondary output terminals " is connected to tester test connection port, call through test power supply, and operational testing instrument can carry out mutual inductor Secondary Winding attribute testing.After completing current winding test, only the switch when front winding need being adjusted to " short circuit is led to " shelves, by waiting that the switch trying winding is adjusted to " input is logical " shelves, namely completing thread-changing process.When selection makes, employ and can bear the two of big current and put switch, to meet the demand of tester Secondary Winding up to 10A test current.Secondary terminals binding post selects 16A can insert type, is convenient to the connection with mutual inductor and tester.Panel adopts the location of epoxy resins insulation plate carrying all parts.Outer version adopts wear-resisting aluminium alloy steel plate attractive in appearance, and namely safety turn increases serviceable life.
Claims (1)
1. a current transformer characteristic test secondary wiring device, comprise connection terminal, testing terminal, short-circuited terminal and double-point double-throw switch, double-point double-throw switch one end is connected with connection terminal, the other end can be placed in testing terminal or short-circuited terminal, it is characterized in that: connection terminal is connected with the wire (S1, S2) of the extraction of the secondary winding of current transformer, short-circuited terminal ground connection;
Described connection terminal two ends shunt voltage table;
Described connection terminal two ends series current table;
Tested winding access testing terminal, non-tested winding access short-circuited terminal, be adjusted to by switch corresponding for tested winding " input is logical ", non-tested winding switch is positioned at " short circuit is led to ".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210422230.8A CN102944700B (en) | 2012-10-30 | 2012-10-30 | A kind of current transformer characteristic test secondary wiring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210422230.8A CN102944700B (en) | 2012-10-30 | 2012-10-30 | A kind of current transformer characteristic test secondary wiring device |
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| Publication Number | Publication Date |
|---|---|
| CN102944700A CN102944700A (en) | 2013-02-27 |
| CN102944700B true CN102944700B (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210422230.8A Expired - Fee Related CN102944700B (en) | 2012-10-30 | 2012-10-30 | A kind of current transformer characteristic test secondary wiring device |
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| CN103869168A (en) * | 2014-03-14 | 2014-06-18 | 云南电力试验研究院（集团）有限公司电力研究院 | Detecting and diagnosing method for secondary circuit of current transformer for electric power |
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| CN104898016A (en) * | 2015-06-26 | 2015-09-09 | 国家电网公司 | Device for checking secondary circuit and polarity of current transformer |
| CN109001586B (en) * | 2016-01-18 | 2020-07-17 | 无锡市埃克威电气有限公司 | Polarity detection method for current transformer |
| CN105510863A (en) * | 2016-01-20 | 2016-04-20 | 国网上海市电力公司 | Short-circuiting system and short-circuiting method of secondary terminal of mutual inductor |
| CN108572344A (en) * | 2017-03-10 | 2018-09-25 | 恩智浦美国有限公司 | Detect the device and method of Current Transformer Secondary side disconnecting |
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| CN111398869B (en) * | 2020-03-31 | 2022-12-09 | 贵州电网有限责任公司 | Mutual inductor handover test device and test method thereof |
| CN111398644B (en) * | 2020-03-31 | 2022-07-01 | 贵州电网有限责任公司 | Mutual inductor handover test switching device and switching method thereof |
| CN112798835A (en) * | 2020-12-28 | 2021-05-14 | 广东电网有限责任公司中山供电局 | Uninterrupted meter replacing device |
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| EP2416167A1 (en) * | 2009-02-28 | 2012-02-08 | Zhejiang Guangtian Transformer Co., Ltd | Improved turn-to-turn short circuit detection device of transformer via differential voltage |
| CN202204913U (en) * | 2011-09-09 | 2012-04-25 | 中国航天科工集团第三研究院第八三五八研究所 | Non-plug circuit board testing device |
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| CN202330690U (en) * | 2011-11-09 | 2012-07-11 | 重庆博森电气（集团）有限公司 | Secondary conversion circuit for detection of current transformer |
| CN203011948U (en) * | 2012-10-30 | 2013-06-19 | 武汉华源电力工程有限责任公司 | Current transformer characteristic test secondary connection device |
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2012
- 2012-10-30 CN CN201210422230.8A patent/CN102944700B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5396172A (en) * | 1993-07-20 | 1995-03-07 | Ontario Hydro | Transformer fault analyzer |
| CN2837857Y (en) * | 2005-10-27 | 2006-11-15 | 比亚迪股份有限公司 | Transformer winding tester |
| EP2416167A1 (en) * | 2009-02-28 | 2012-02-08 | Zhejiang Guangtian Transformer Co., Ltd | Improved turn-to-turn short circuit detection device of transformer via differential voltage |
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| CN203011948U (en) * | 2012-10-30 | 2013-06-19 | 武汉华源电力工程有限责任公司 | Current transformer characteristic test secondary connection device |
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| CN102944700A (en) | 2013-02-27 |
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Effective date of registration: 20151203 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: WUHAN POWER SUPPLY COMPANY OF STATE GRID HUBEI ELECTRIC POWER Co. Patentee after: POWER TRANSMISSION AND TRANSFORMATION ENGINEERING BRANCH OF WUHAN HUAYUAN ELECTRIC POWER GROUP CO.,LTD. Address before: 430051 Hanyang Road, Hubei, Wuhan, No. 545 Patentee before: Wuhan Huayuan Electric Power Engineering Co.,Ltd. |
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Granted publication date: 20151118 Termination date: 20211030 |