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
- Publication number
- 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
- cable core
- electrically connected
- transformer winding
- tap
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- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 28
- 230000005611 electricity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model discloses an on-off detection apparatus for a secondary cable core of a current transformer and helps to solve problems that a conventional measuring device is time-consuming and is liable to go wrong during detection. The on-off detection apparatus comprises a current transformer winding (1), a first cable core (4) and a second cable core (5). A first tap (2) of the current transformer winding is electrically connected with an introducing end of the first cable core (4). The first tap (2) of the current transformer winding is connected with the ground successively through a first coupling resistor (9), a first indicating lamp (10) and a first dry cell (11). A second tap (3) of the current transformer winding is electrically connected with an introducing end of the second cable core (5). A fixed end (8) of a disconnection switch is connected with the ground successively through a second coupling resistor (12), a second indicating lamp (13) and a second dry cell (14). A movable end (7) of the disconnection switch is movably connected with the two introducing ends of the two cable cores. According to the on-off detection apparatus, new methods are provided for on-off detection of a core of a wiring cable of a conventional current transformer.
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 |
Country Status (1)
| Country | Link |
|---|---|
| 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 |
Granted publication date: 20130703 Termination date: 20181127 |
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| CF01 | Termination of patent right due to non-payment of annual fee |