CN203037783U - On-off detection apparatus for secondary cable core of current transformer - Google Patents
On-off detection apparatus for secondary cable core of current transformer Download PDFInfo
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- CN203037783U CN203037783U CN 201220635398 CN201220635398U CN203037783U CN 203037783 U CN203037783 U CN 203037783U CN 201220635398 CN201220635398 CN 201220635398 CN 201220635398 U CN201220635398 U CN 201220635398U CN 203037783 U CN203037783 U CN 203037783U
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- current transformer
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- electrically connected
- transformer winding
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Abstract
本实用新型公开了一种电流互感器二次电缆线芯通断检测装置，解决了现有测量装置存在的检测费时和容易出错的问题。包括电流互感器绕组（1）、第一电缆线芯（4）和第二电缆线芯（5），电流互感器绕组第一抽头（2）与第一电缆线芯（4）的引入端电连接，电流互感器绕组第一抽头（2）依次通过第一匹配电阻（9）、第一指示灯（10）和第一干电池（11）接地，电流互感器绕组第二抽头（3）与第二电缆线芯（5）的引入端电连接，铡刀开关的固定端（8）依次通过第二匹配电阻（12）、第二指示灯（13）和第二干电池（14）接地，铡刀开关的活动端（7）与两电缆线芯的引出端活动连接。本实用新型为现有电流互感器接线电缆的线芯通断检测提供了新的手段。
The utility model discloses an on-off detection device for a secondary cable core of a current transformer, which solves the problems of time-consuming detection and error-prone problems existing in the existing measuring device. Including the current transformer winding (1), the first cable core (4) and the second cable core (5), the first tap (2) of the current transformer winding and the lead-in end of the first cable core (4) are electrically connected connection, the first tap (2) of the current transformer winding is grounded sequentially through the first matching resistor (9), the first indicator light (10) and the first dry battery (11), and the second tap (3) of the current transformer winding is connected to the first The lead-in ends of the two cable cores (5) are electrically connected, the fixed end (8) of the guillotine switch is grounded sequentially through the second matching resistor (12), the second indicator light (13) and the second dry battery (14), and the guillotine switch The movable end (7) is movably connected with the lead-out ends of the two cable cores. The utility model provides a new means for the on-off detection of the wire core of the current transformer wiring cable.
Description
Technical field
The utility model relates to a kind of cable core switching detection device, particularly a kind of device that current transformer terminal connections case is carried out the break-make detection to the core of the connection cable between the isolating switch convergence control cabinet.
Background technology
At present, because the electronic current mutual inductor technology is still immature, the traditional type current transformer is still adopted in the collection of the used secondary current of electric grid relay protection device.In electric grid relay protection device and loop debug process thereof, because the existence of traditional type current transformer is just inevitable for itself and secondary cable wiring correctness inspection work.Existing method to the inspection of Current Transformer Secondary cable core wiring correctness is, one end of two examination lamps is connected to top and the terminal of cable core to be checked respectively, other end ground connection illustrates the loop connection if the examination lamp is bright, verify that namely core connection to be checked is intact.Because the resistance of current transformer winding is less, be generally several ohm, when checking the current transformer winding to the secondary core break-make of current transformer terminal box, intersect for fear of cable core, mutual inductor core winding terminal must be opened, disconnect with the mutual inductor winding is inner.In the debugging scene, the core winding terminal to be checked of current transformer adopts the wound form fixed form for fixing reliable more.If core winding terminal to be checked is opened, must the core of opening be marked, carry out the line inspection then, after the wired examination of institute is finished, must the core of opening be recovered according to mark.Whole process is very time-consuming loaded down with trivial details, and makes mistakes easily.Because current transformer is installed on overhead very high place, and the debugging technique personnel must use of seat belts or use crane in the high-altitude long working, the danger of examination process is increased in addition.
Summary of the invention
The utility model provides a kind of Current Transformer Secondary cable core switching detection device, the problem that has solved the time-consuming loaded down with trivial details of existing measurement mechanism existence and made mistakes easily.
The utility model overcomes the above problems by following scheme:
A kind of Current Transformer Secondary cable core switching detection device, comprise the current transformer winding, first cable core and second cable core, first tap of current transformer winding is electrically connected with the leading-in end of first cable core, first tap of current transformer winding is electrically connected with an end of first pilot lamp by first build-out resistor, the other end of first pilot lamp is connected with the negative electricity of first dry cell, the plus earth of first dry cell, second tap of current transformer winding is electrically connected with the leading-in end of second cable core, the stiff end of chopper switch is electrically connected with an end of second pilot lamp by second build-out resistor, the other end of second pilot lamp is electrically connected with the positive pole of second dry cell, the minus earth of second dry cell, the movable end of chopper switch is electrically connected with the exit of first cable core or is electrically connected with the exit of second cable core.
The resistance of the resistance of first build-out resistor and second build-out resistor is 3-20 ohm.
The utility model is simple in structure, and processing ease is for a kind of new means and the method for providing is provided the core break-make that has the current transformer connection cable now.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
A kind of Current Transformer Secondary cable core switching detection device, comprise current transformer winding 1, first cable core 4 and second cable core 5, first tap 2 of current transformer winding is electrically connected with the leading-in end of first cable core 4, first tap 2 of current transformer winding is electrically connected with an end of first pilot lamp 10 by first build-out resistor 9, the other end of first pilot lamp 10 is connected with the negative electricity of first dry cell 11, the plus earth of first dry cell 11, second tap 3 of current transformer winding is electrically connected with the leading-in end of second cable core 5, the stiff end 8 of chopper switch is electrically connected with an end of second pilot lamp 13 by second build-out resistor 12, the other end of second pilot lamp 13 is electrically connected with the positive pole of second dry cell 14, the minus earth of second dry cell 14, the movable end 7 of chopper switch is electrically connected with the exit 6 of first cable core 4 or is electrically connected with the exit 6 of second cable core 5.
The resistance of the resistance of first build-out resistor 9 and second build-out resistor 12 is 3-20 ohm.
Principle of the present utility model is: because the winding of different transformation ratio current transformer has different resistance values, when measuring current mutual inductor secondary cable core break-make, in two examination lamp branch roads, seal in first build-out resistor 9 and second build-out resistor 12 respectively according to current transformer ratio, win pilot lamp 10 and second pilot lamp 13 can normally be lighted without the current transformer winding time, can not light then trying lamp through the current transformer winding.First build-out resistor 9 and second build-out resistor 12 can be according to the different resistance values of no-load voltage ratio (as 600/5,1200/5,2500/1,12000/5 etc.) coupling of current transformer.In the practical operation, in the examination lamp resistance can be set and switch shelves, each shelves can be by 3-20 ohm configuration adjustable resistance, and every grade is being fixed on a certain resistance value through after the actual verification.When checking other non-current transformer loops, resistance value can be switched to 0 ohm.
Concrete test process is: the movable end 7 with the chopper switch is electrically connected with the exit 6 of first cable core 4 earlier, and in the loop when at this moment first pilot lamp 10 and second pilot lamp 13 are in without the current transformer winding, two pilot lamp are lighted.When the movable end 7 of chopper switch being got to when being electrically connected with the exit 6 of second cable core 5, in loop when at this moment first pilot lamp 10 and second pilot lamp 13 are in through the current transformer winding, make two pilot lamp not lighted owing to seal in the resistance of current transformer winding.Illustrate that first cable core 4 leads to, otherwise illustrate that first cable core 4 breaks.
Claims (2)
1. Current Transformer Secondary cable core switching detection device, comprise current transformer winding (1), first cable core (4) and second cable core (5), it is characterized in that, current transformer winding first tap (2) is electrically connected with the leading-in end of first cable core (4), current transformer winding first tap (2) is electrically connected with an end of first pilot lamp (10) by first build-out resistor (9), the other end of first pilot lamp (10) is connected with the negative electricity of first dry cell (11), the plus earth of first dry cell (11), current transformer winding second tap (3) is electrically connected with the leading-in end of second cable core (5), the stiff end of chopper switch (8) is electrically connected with an end of second pilot lamp (13) by second build-out resistor (12), the other end of second pilot lamp (13) is electrically connected with the positive pole of second dry cell (14), the minus earth of second dry cell (14), the movable end of chopper switch (7) is electrically connected with the exit (6) of first cable core (4) or is electrically connected with the exit (6) of second cable core (5).
2. a kind of Current Transformer Secondary cable core switching detection device according to claim 1 is characterized in that, the resistance of the resistance of first build-out resistor (9) and second build-out resistor (12) is 3-20 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220635398 CN203037783U (en) | 2012-11-27 | 2012-11-27 | On-off detection apparatus for secondary cable core of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220635398 CN203037783U (en) | 2012-11-27 | 2012-11-27 | On-off detection apparatus for secondary cable core of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203037783U true CN203037783U (en) | 2013-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220635398 Expired - Fee Related CN203037783U (en) | 2012-11-27 | 2012-11-27 | On-off detection apparatus for secondary cable core of current transformer |
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| Country | Link |
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| CN (1) | CN203037783U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592561A (en) * | 2013-11-19 | 2014-02-19 | 国家电网公司 | Device for detecting current mutual inductor secondary wiring |
| CN106569085A (en) * | 2016-10-27 | 2017-04-19 | 国网内蒙古东部电力有限公司电力科学研究院 | Current transformer secondary circuit cable checking method |
| CN112180292A (en) * | 2020-09-30 | 2021-01-05 | 中国核动力研究设计院 | System and method for detecting on-off of cables between nuclear power plant reactor control system cabinets |
-
2012
- 2012-11-27 CN CN 201220635398 patent/CN203037783U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592561A (en) * | 2013-11-19 | 2014-02-19 | 国家电网公司 | Device for detecting current mutual inductor secondary wiring |
| CN103592561B (en) * | 2013-11-19 | 2016-04-27 | 国家电网公司 | Secondary wiring of current mutual inductor testing fixture |
| CN106569085A (en) * | 2016-10-27 | 2017-04-19 | 国网内蒙古东部电力有限公司电力科学研究院 | Current transformer secondary circuit cable checking method |
| CN112180292A (en) * | 2020-09-30 | 2021-01-05 | 中国核动力研究设计院 | System and method for detecting on-off of cables between nuclear power plant reactor control system cabinets |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20130703 Termination date: 20181127 |