CN104215877A - Combined CT (current transformer) polarity test device - Google Patents
Combined CT (current transformer) polarity test device Download PDFInfo
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- CN104215877A CN104215877A CN201410414663.8A CN201410414663A CN104215877A CN 104215877 A CN104215877 A CN 104215877A CN 201410414663 A CN201410414663 A CN 201410414663A CN 104215877 A CN104215877 A CN 104215877A
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Abstract
The invention discloses a combined CT (current transformer) polarity test device and solves the problem of long time being spent on tool preparation and wiring during the CT polarity test. The technical scheme includes that the combined CT polarity test device comprises a box body, a face plate, coiling mechanisms and wire clamping mechanisms, the face plate covers a face plate frame, the coiling mechanisms are arranged in the box body, each of a left side plate and a right side plate of the box body is provided with two wire clamping mechanisms, and the upper face of the face plate is provided with a first binding post, a secondary binding post, an ampere meter, a test button and a power switch. The combined CT polarity test device has the advantages that according to the actual state of the field work, the problem of long time spent on the tool preparation and the wiring is solved, and work efficiency of the CT polarity test; the special combined tool is developed, allowing two workers to easily implement the polarity test; labor intensity is reduced, only with two workers, the test is implemented within the same time of the conventional method with four workers, thus work efficiency is improved.
Description
Technical field
The present invention relates to a kind of current transformer polarity test device.
Background technology
Large for conventional polar experiment work difficulty, program is loaded down with trivial details, and efficiency is low, and job security is pessimistic, and the discharge of traditional experiment Work tool is in disorder, assembling and use inconvenience.By collecting related data and technology, according to the actual conditions of work on the spot, on the one hand by the repetition test to automatic takeup wheel, can accomplish that test wire acts freely, on the other hand the guidance panel of device is repeatedly revised, trying one's best, it is fast simple to operation to accomplish, finally by group member common, make great efforts have developed the combined type polarity test device meeting work on the spot practical operation needs.
" DL/T 727-2000 mutual inductor operating maintenance directive/guide " specifies: mutual inductor must check polar relationship before going into operation.My unit requires more strict: to secondary loop of mutual inductor change, draw to connect and all must check original polarity, does integral polarity test after completing change again.Along with Transfomer Substation Reconstruction, enlarging or capital construction increase year by year, the work of current transformer polarity test is very heavy.
In transformer station, current transformer arrangement wiring part is in the bottom of switch cubicle, conventional polar test needs personnel to roll up orlop at switch cubicle, lower layer space is narrow and small, grounding switch also in lower floor, if bring safety helmet, head can not lifted, bring very big hidden danger to personal safety, work difficulty is large, and program is loaded down with trivial details, efficiency is low, and job security is pessimistic.
The discharge of traditional experiment Work tool is in disorder, assembling and use inconvenience.For the 10kV current transformer at an interval, polarity test completes from preparing to terminate needs 4 skilled workers time of about 35 minutes, bothers time-consuming.For completing annual production task smoothly, our group of leader's instruction increases work efficiency, and is significantly shortened the CT polarity test time.
Group has carried out detail statistics the current transformer polarity test time to the 3-7 month in 2013 10 10kV outgoing line intervals.Each interval comprises A, B, C three-phase, often includes 3 groups of Secondary Winding mutually, and the polarity test at single interval completes the test job of 9 groups of Secondary Winding altogether, and the time used is as shown in the table:
Reached a conclusion by above data: the monospace current transformer polarity test average used time is 32.4 minutes, the shortest is 28 minutes.
Summary of the invention
In order to overcome, instrument in CT polarity test process prepares, connection charge time a difficult problem, the development one that proposes a solution conveniently test unit, therefore we for achieving the above object, the technical solution used in the present invention is:
A kind of combined type CT polarity test device, comprise box body, panel, winding mechanism, thread clamping mechanism, panel is fastened on panel frame, the inside of box body is provided with winding mechanism, the left plate of box body and right plate respectively install two thread clamping mechanisms, are provided with primary connection post, secondary connection post, reometer, test button, power switch above panel;
The inside of box body is provided with four winding mechanisms, winding mechanism comprises central shaft, riser, coreless rolls bobbin, reset reel, the two ends of central shaft are fixed on box plate by riser, coreless rolls bobbin and reset reel is socketed with outside central shaft, reset reel is connected to one end of coreless rolls bobbin, wind spring is equipped with in reset reel inside, wind spring innermost circle end is fixing on center shaft, wind spring outmost turns end is connected on reset mandrel interior wall, coreless rolls bobbin is wound with test wire, the test wire of two winding mechanisms in left side is a spiral, the test wire of two winding mechanisms on right side is secondary spiral, the end of test wire outside box body is connected with plug,
Both sides in box body respectively have two to test string holes, each test string holes is provided with thread clamping mechanism, thread clamping mechanism comprises ejector return pin, clamp, limiting plate, ejector return pin outside box body on cover have stage clip and be connected with the upper end of clamp inside box body, clamp is hinged on clamp axle, clamp axle is arranged on the installing plate of cabinet wall, and clamp end is pressed on test wire, and limiting plate is positioned at below test string holes;
The plug of a spiral is connected with the primary winding of mutual inductor, reometer is connected with the secondary coil of mutual inductor by secondary spiral, one time spiral terminals L1, L2 in box body are parallel with test indicating circuit, test indicating circuit is composed in series by resistance R2 and LED 2, power indicating circuit connect with test button K2 after entirety with test indicating circuit in parallel, power indicating circuit is in series by resistance R1 and LED 1, and power switch K1 is positioned at trunk roads and one end connects battery E.
Advantage of the present invention is: this device, according to the actual conditions of work on the spot, successfully solves wiring and instrument prepares time-consuming problem, improves the work efficiency of current transformer polarity test.Develop Special combined tools, two people's easy manipulation, can complete polarity test work.Intensity of workers reduces, and when the same time, the originally workload of 4 people, after using this device, 2 people easily complete, and greatly reduce working strength, improve work efficiency.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Fig. 2 is perspective view of the present invention.
Fig. 3 is inner structure schematic diagram of the present invention.
Fig. 4 is clamping-line structure schematic diagram of the present invention.
Fig. 5 is winding mechanism schematic diagram of the present invention.
In accompanying drawing: 1, box body; 2, ejector return pin; 3, plug; 4, primary connection post; 5, test button; 6, power switch; 7, secondary connection post; 8, oppositely indicate; 9, forward instruction; 10, panel; 11, reometer; 12, panel frame; 13, thread clamping mechanism; 14, reset reel; 15, hollow spool; 16, battery; 17, test wire; 18, clamp; 19, clamp axle; 20, clamp hook; 21, string holes is tested; 22, spacing hole; 23, wind spring; 24, central shaft; 25, baffle plate; 26 risers.
Embodiment
Embodiment
1, the present invention is provided with automatic takeup wheel.For easy tangled up and knotted problem during the solution manual folding and unfolding of test wire, devise automatic takeup wheel, realize the reasonable Arrangement of test wire in operation.
Box body 1 inside is provided with four winding mechanisms, and winding mechanism comprises central shaft 24, riser 26, coreless rolls bobbin 15, reset reel 14, and the two ends of central shaft 24 are fixed on box body 1 base plate by riser 26.Coreless rolls bobbin 15 and reset reel 14 is socketed with outside central shaft 24, reset reel 14 is connected to one end of coreless rolls bobbin 15, wind spring 23 is equipped with in reset reel 14 inside, wind spring 23 innermost circle end is fixed on central shaft 24, wind spring 23 outmost turns end is connected on reset reel 14 inwall, coreless rolls bobbin 15 is wound with test wire 17.Winding mechanism can realize the function of test wire automatic drawing back, and structure simply and very practical, achieves the reasonable Arrangement of wire, stops wire and is wound around, damages due to crushing.
One end that reset reel 14 is connected to coreless rolls bobbin 15 constitutes automatic takeup wheel, between automatic takeup wheel and central shaft 24, energy-stored spring and wind spring 23 is housed, and built-in test wire 17 is around in automatic takeup wheel race.During test, outwards extract wire out, take-up reel rotates, energy-stored spring stretching stored energy; During retraction, energy-stored spring releases energy, and drives automatic takeup wheel to rotate in the opposite direction, is automatically closed in take-up race by wire.
Automatic takeup wheel adopts stainless steel, and automatic takeup wheel is arranged in combined operation case.Control box panel there are four external plug in buttons and primary connection post 4 and secondary connection post 7, just in case test lead breaks down, extrapolation test wire can be facilitated, realize the connection with operating power.Primary connection post 4 is connected respectively at primary connection and secondary connection with the connection terminal of secondary connection post 7 in box body 1 inside.
2, the present invention needs to match suitable inner conductors.
Conventional test line external insulation skin depth is not fragile, tensile strength foot, economical and practical.Through on-the-spot test, automatic takeup wheel can complete the full-automatic folding and unfolding of test wire preferably.
Can not regain at any time under elastic force effect for the ease of test test wire, this device is provided with thread clamping mechanism 13 above each test string holes.Thread clamping mechanism comprises ejector return pin 2, clamp 18, limiting plate 22, ejector return pin 2 outside box body 1 on cover have stage clip and be connected with the upper end of clamp 18 inside box body 1, clamp 18 is hinged on clamp axle 19, clamp axle 19 is arranged on the installing plate of cabinet wall, clamp 18 end is pressed on test wire 17, and limiting plate 22 is positioned at below test string holes 21.Ejector return pin 2 has the effect of automatically reseting, and under normality, ejector return pin 2 draws clamp 18 to be clamped by test wire 17.After pressing ejector return pin 2, clamp 18 turns clockwise, and ejector return pin 2 drives clamp hook 20 upwards to lift, and has unclamped test wire.Therefore, pull out the test wire 17 of a segment length, stop pulling rear test wire 17 and automatically stop at any time; When pressing ejector return pin 2, test wire will twine back coreless rolls bobbin 15 automatically.
As shown in Figure 1, being described below of circuit.K switch 1 is total control switch and power switch 6, the switching of control operation power supply.When K1 closes, LED 1 power light is lighted, and shows that present battery E1 has electricity.Again by test button K2(test button 5) splitting or integrating, control the switching of a current transformer winding side power supply.When K2 closes, LED 2 output indicator is lighted, and shows that current flow mutual inductor winding is energized.LED 1, LED 2 are separately positioned in power switch 6, test button 5, and power switch 6, test button 5 have view window.Press test button 5, observe reometer indicator sense of rotation situation and judge the coil polarity of mutual inductor accordingly.After using the present invention, we added up the current transformer polarity test time at 8 10kV intervals June in 2013, as shown in the table:
The current transformer polarity test average used time of monospace is 13.9 minutes, and instrument prepares and wiring time consuming procedures found is better solved, and test period has had obvious shortening, achieves moving target smoothly.This device is equally applicable to the test of voltage transformer (VT), and test philosophy method is constant.
Advantage of the present invention is as follows.
1, combination tool cost is 1000 yuan/cover, reaches more than 20 years serviceable life.This instrument is time saving and energy saving, saves the time of power failure, thus decreases the economic loss of enterprise.
2, intensity of workers reduces, and when the same time, the originally workload of 3 people, after using this device, two people easily complete, and greatly reduce working strength, improve work efficiency.
Claims (1)
1. a combined type CT polarity test device, it is characterized in that: comprise box body (1), panel (10), winding mechanism, thread clamping mechanism (13), panel (10) is fastened on panel frame (12), the inside of box body (1) is provided with winding mechanism, the left plate of box body (1) and right plate respectively install two thread clamping mechanisms (13), and panel (10) is provided with primary connection post (4), secondary connection post (7), reometer (11), test button (5), power switch (6) above;
The inside of box body (1) is provided with four winding mechanisms, winding mechanism comprises central shaft (24), riser (26), coreless rolls bobbin (15), reset reel (14), the two ends of central shaft (24) are fixed on box body (1) base plate by riser (26), central shaft (24) outside is socketed with coreless rolls bobbin (15) and reset reel (14), reset reel (14) is connected to one end of coreless rolls bobbin (15), wind spring (23) is equipped with in reset reel (14) inside, wind spring (23) innermost circle end is fixed on central shaft (24), wind spring (23) outmost turns end is connected on reset reel (14) inwall, coreless rolls bobbin (15) is wound with test wire (17), the test wire (17) of two winding mechanisms in left side is a spiral, the test wire (17) of two winding mechanisms on right side is secondary spiral, test wire (17) is connected with plug (3) at the end in box body (1) outside,
Both sides in box body (1) respectively have two to test string holes (21), each test string holes (21) is provided with thread clamping mechanism (13), thread clamping mechanism (13) comprises ejector return pin (2), clamp (18), limiting plate (22), ejector return pin (2) cover on box body (1) outside has stage clip and is connected with the upper end of clamp (18) in box body (1) inner side, clamp (18) is hinged on clamp axle (19), clamp axle (19) is arranged on the installing plate of cabinet wall, clamp (18) end is pressed on test wire (17), limiting plate (22) is positioned at below test string holes (21),
The plug (3) of a spiral is connected with the primary winding of mutual inductor, reometer (11) is connected with the secondary coil of mutual inductor by secondary spiral, one time spiral terminals L1, L2 in box body (1) are parallel with test indicating circuit, test indicating circuit is composed in series by resistance R2 and LED 2, power indicating circuit connect with test button K2 after entirety with test indicating circuit in parallel, power indicating circuit is in series by resistance R1 and LED 1, and power switch K1 is positioned at trunk roads and one end connects battery E.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410414663.8A CN104215877B (en) | 2014-08-21 | Combination type CT polarity test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410414663.8A CN104215877B (en) | 2014-08-21 | Combination type CT polarity test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104215877A true CN104215877A (en) | 2014-12-17 |
| CN104215877B CN104215877B (en) | 2017-01-04 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749480A (en) * | 2015-03-08 | 2015-07-01 | 国家电网公司 | Whole-set secondary circuit polarity testing device used for relay protection |
| CN105575603A (en) * | 2016-01-15 | 2016-05-11 | 胡小青 | High-voltage instrument transformer for improving wire clamping strength |
| CN106093696A (en) * | 2016-06-13 | 2016-11-09 | 贵州电网有限责任公司贵阳供电局 | Outside transformer substation current transformer polarity indication device |
| CN107576885A (en) * | 2017-08-23 | 2018-01-12 | 国网山东省电力公司淄博供电公司 | Device for detecting polarity for metering transformer secondary circuit |
| CN107643505A (en) * | 2017-10-11 | 2018-01-30 | 国网宁夏电力公司吴忠供电公司 | 110kV current transformer integrated form polarity test devices |
| CN107677929A (en) * | 2017-07-14 | 2018-02-09 | 国网浙江省电力公司嘉兴供电公司 | A kind of mutual inductor polarity test system |
| CN108363495A (en) * | 2018-01-22 | 2018-08-03 | 杭州中沛电子有限公司 | Automatic sensing keyboard drawer |
| CN109444718A (en) * | 2018-12-04 | 2019-03-08 | 奥士康科技股份有限公司 | Short analytical equipment and analysis method in a kind of pcb board |
| CN112102692A (en) * | 2020-09-04 | 2020-12-18 | 广东电网有限责任公司 | Suspension type fault simulation training box |
| CN114325507A (en) * | 2022-03-17 | 2022-04-12 | 国网山东省电力公司安丘市供电公司 | CT polarity test device |
| CN115421080A (en) * | 2022-09-21 | 2022-12-02 | 国网山东省电力公司淄博供电公司 | Low-voltage current transformer wiring inspection tester |
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| JPS59121814A (en) * | 1982-12-28 | 1984-07-14 | Toshiba Corp | Bushing type current transformer |
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| CN202098933U (en) * | 2011-05-31 | 2012-01-04 | 杭州市电力局 | Automatic winding roll |
| CN103991345A (en) * | 2014-05-30 | 2014-08-20 | 宁波天益齿轴齿轮有限公司 | Tractor with cables fast to wind |
| CN204028279U (en) * | 2014-08-21 | 2014-12-17 | 国家电网公司 | Combined type CT polarity test device |
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| JPS59121814A (en) * | 1982-12-28 | 1984-07-14 | Toshiba Corp | Bushing type current transformer |
| JP2003189425A (en) * | 2001-12-17 | 2003-07-04 | Toshiba Corp | Apparatus for testing protection of power receiving and distributing facility system |
| CN201000975Y (en) * | 2006-12-22 | 2008-01-02 | 卢志铭 | Dual-pulling roller for receiving wires by pressing key |
| CN202098933U (en) * | 2011-05-31 | 2012-01-04 | 杭州市电力局 | Automatic winding roll |
| CN102259611A (en) * | 2011-07-14 | 2011-11-30 | 苏州华电电气股份有限公司 | Relay protection checking vehicle |
| CN103991345A (en) * | 2014-05-30 | 2014-08-20 | 宁波天益齿轴齿轮有限公司 | Tractor with cables fast to wind |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749480A (en) * | 2015-03-08 | 2015-07-01 | 国家电网公司 | Whole-set secondary circuit polarity testing device used for relay protection |
| CN104749480B (en) * | 2015-03-08 | 2017-06-30 | 国网山东省电力公司枣庄供电公司 | One kind is used for relay protection secondary circuit whole group polarity test device |
| CN105575603A (en) * | 2016-01-15 | 2016-05-11 | 胡小青 | High-voltage instrument transformer for improving wire clamping strength |
| CN106093696A (en) * | 2016-06-13 | 2016-11-09 | 贵州电网有限责任公司贵阳供电局 | Outside transformer substation current transformer polarity indication device |
| CN106093696B (en) * | 2016-06-13 | 2018-07-17 | 贵州电网有限责任公司贵阳供电局 | Outside transformer substation current transformer polarity indication device |
| CN107677929A (en) * | 2017-07-14 | 2018-02-09 | 国网浙江省电力公司嘉兴供电公司 | A kind of mutual inductor polarity test system |
| CN107576885A (en) * | 2017-08-23 | 2018-01-12 | 国网山东省电力公司淄博供电公司 | Device for detecting polarity for metering transformer secondary circuit |
| CN107576885B (en) * | 2017-08-23 | 2020-01-07 | 国网山东省电力公司淄博供电公司 | Polarity detection device for secondary circuit of metering transformer |
| CN107643505A (en) * | 2017-10-11 | 2018-01-30 | 国网宁夏电力公司吴忠供电公司 | 110kV current transformer integrated form polarity test devices |
| CN108363495A (en) * | 2018-01-22 | 2018-08-03 | 杭州中沛电子有限公司 | Automatic sensing keyboard drawer |
| CN109444718A (en) * | 2018-12-04 | 2019-03-08 | 奥士康科技股份有限公司 | Short analytical equipment and analysis method in a kind of pcb board |
| CN112102692A (en) * | 2020-09-04 | 2020-12-18 | 广东电网有限责任公司 | Suspension type fault simulation training box |
| CN114325507A (en) * | 2022-03-17 | 2022-04-12 | 国网山东省电力公司安丘市供电公司 | CT polarity test device |
| CN115421080A (en) * | 2022-09-21 | 2022-12-02 | 国网山东省电力公司淄博供电公司 | Low-voltage current transformer wiring inspection tester |
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