CN104715913A - Sampling device for pincer-shaped resistive current transformer - Google Patents
Sampling device for pincer-shaped resistive current transformer Download PDFInfo
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- CN104715913A CN104715913A CN201510136048.XA CN201510136048A CN104715913A CN 104715913 A CN104715913 A CN 104715913A CN 201510136048 A CN201510136048 A CN 201510136048A CN 104715913 A CN104715913 A CN 104715913A
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Abstract
The invention discloses a sampling device for a pincer-shaped resistive current transformer. The sampling device comprises a first iron core, a first coil wound around the outer wall of the first iron core, a second iron core arranged in parallel to the first iron core to form double iron cores, a second coil wound around the outer wall of the second iron core, and a third coil wound around the outer walls of the double iron cores, wherein the forward dotted terminal of the first coil, the forward dotted terminal of the third coil and the reverse dotted terminal of the second coil are connected; the reverse dotted terminal of the first coil, the reverse dotted terminal of the third coil and the forward dotted terminal of the second coil are connected. The sampling device is suitable for a portable electrification detector of the resistive leakage current of a pincer-shaped intelligent lightning arrester, the sampling device can be used without power failure, the effects of signal reliability and high anti-jamming capacity are achieved, and therefore interference generated in the electrification test process of the lightning arrester in a station is reduced and even eliminated.
Description
Technical field
The present invention relates to a kind of sampler of current transformer, refer in particular to a kind of sampler being applicable to pincerlike current in resistance property instrument transformer.
Background technology
Metal oxide arrester (MOV) because of its superior overvoltage protection characteristic be in transformer station, apply maximum lightning arresters.But the fault of lightning arrester may cause it to explode, influential system safe operation, therefore strict effective detection and periodic preventative test must be carried out to operating lightning arrester.Due to lightning arrester prerun (particularly main transformer three side lightning arrester) main equipment of must stopping transport, the operational reliability of equipment can be reduced, and the main equipment because the restriction of operational mode cannot be stopped transport sometimes, cause lightning arrester cannot prerun on time, therefore the uninterrupted power test of lightning arrester seems particularly important.
Although take multiple technologies measure for many years, all do not reach desirable monitoring effect.Along with further developing of power industry, again power grid security reliability service is had higher requirement, owing to being subject to the restriction of many-sided condition, resistive leakage current product so far for on-line monitoring lightning arrester is less, and the good product of performance is less, and great majority concentrate stranded following several large technical bottleneck to be difficult to break through: 1, lack the change of effective high_voltage isolation and send mode, cannot improve safe class and the antijamming capability of product; 2, lack effective Obtaining Accurate reference point means, certainty of measurement and the stability of monitor cannot be improved; 3, lack effective Accurate Analysis computational methods, the precision of product, speed and sensitivity cannot be improved; 4, lack effective transfer of data communication scheme, measurement data and the parameter of monitor cannot be transmitted in time.
At present, in standing, lightning arrester all needs to carry out lightning arrester live-line test before annual plum rain season, whether exceeded standard by the resistive component measured in tail end leakage current, judge whether lightning arrester body insulation meets service conditions, can ensure that safety spends plum rains many thunders seasons.Owing to all there is obvious interference at test process at present, therefore, the portable live detection instrument developing the resistive leakage current of intelligent pincerlike lightning arrester has practical significance to above-mentioned work.
Summary of the invention
The object of this invention is to provide a kind of sampler of pincerlike current in resistance property instrument transformer, have the use that do not have a power failure, signal is reliable, the effect that antijamming capability is strong.
For achieving the above object, technical scheme of the present invention is to provide a kind of sampler of pincerlike current in resistance property instrument transformer, comprises: the first iron core; First coil, it is wound on the outer wall of the first described iron core; Second iron core, itself and the first iron core laid out in parallel form double-iron core; Second coil, it is wound on the outer wall of the second described iron core; Tertiary coil, it is wound on the outer wall of described double-iron core; Wherein, the forward Same Name of Ends of the first described coil, the forward Same Name of Ends of tertiary coil are connected with the reverse Same Name of Ends of the second coil; The reverse Same Name of Ends of the first described coil, the reverse Same Name of Ends of tertiary coil are connected with the forward Same Name of Ends of the second coil.
The first described iron core is all identical with the structure and material of the second iron core.
The first described coil is wound on the first iron core clockwise.
The first described coil is wound on 250 circles on the first iron core.
The second described coil is wound on the second iron core counterclockwise.
The second described coil winding 250 circles on the second iron core.
Described tertiary coil is wound on double-iron core clockwise.
Described tertiary coil is wound on 500 circles on double-iron core.
The sampler of pincerlike current in resistance property instrument transformer provided by the present invention, be applicable to the portable live detection instrument of the resistive leakage current of intelligent pincerlike lightning arrester, reach the use that do not have a power failure, signal is reliable, the effect that antijamming capability is strong, thus reduce interference when even eliminating that in station, lightning arrester carries out live testing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the sampler of pincerlike current in resistance property instrument transformer in the present invention.
Embodiment
Below in conjunction with Fig. 1, describe a preferred embodiment of the present invention in detail.
As shown in Figure 1, be the sampler of pincerlike current in resistance property instrument transformer provided by the present invention, adopt double-iron core instrument transformer structure, it comprises: the first iron core 1; First coil 3, it is wound on the outer wall of the first described iron core 1; Second iron core 2, itself and the first iron core 1 laid out in parallel form double-iron core; Second coil 4, it is wound on the outer wall of the second described iron core 2; Tertiary coil 5, it is wound on the outer wall of described double-iron core; Wherein, the described forward Same Name of Ends of the first coil 3, the forward Same Name of Ends of tertiary coil 5 are connected with the reverse Same Name of Ends of the second coil 4; The described reverse Same Name of Ends of the first coil 3, the reverse Same Name of Ends of tertiary coil 5 are connected with the forward Same Name of Ends of the second coil 4.
The first described iron core 1 is all identical with the structure and material of the second iron core 2.
The first described coil 3 is wound on the first iron core 1 clockwise.
The first described coil 3 is wound on 250 circles on the first iron core 1.
The second described coil 4 is wound on the second iron core 2 counterclockwise.
The second described coil 4 is wound on 250 circles on the second iron core 2.
Described tertiary coil 5 is wound on double-iron core clockwise.
Described tertiary coil 5 is wound on 500 circles on double-iron core.
The sampler of pincerlike current in resistance property instrument transformer provided by the present invention, be applicable to the portable live detection instrument of the resistive leakage current of intelligent pincerlike lightning arrester, reach the use that do not have a power failure, signal is reliable, the effect that antijamming capability is strong, thus reduce interference when even eliminating that in station, lightning arrester carries out live testing.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
1. a sampler for pincerlike current in resistance property instrument transformer, is characterized in that, comprise:
First iron core (1);
First coil (3), it is wound on the outer wall of described the first iron core (1);
Second iron core (2), itself and the first iron core (1) laid out in parallel form double-iron core;
Second coil (4), it is wound on the outer wall of described the second iron core (2);
Tertiary coil (5), it is wound on the outer wall of described double-iron core;
Wherein, the forward Same Name of Ends of described the first coil (3), the forward Same Name of Ends of tertiary coil (5) are connected with the reverse Same Name of Ends of the second coil (4); The reverse Same Name of Ends of described the first coil (3), the reverse Same Name of Ends of tertiary coil (5) are connected with the forward Same Name of Ends of the second coil (4).
2. the sampler of pincerlike current in resistance property instrument transformer as claimed in claim 1, is characterized in that, described the first iron core (1) is all identical with the structure and material of the second iron core (2).
3. the sampler of pincerlike current in resistance property instrument transformer as claimed in claim 2, is characterized in that, described the first coil (3) is wound on the first iron core (1) clockwise.
4. the sampler of pincerlike current in resistance property instrument transformer as claimed in claim 3, is characterized in that, described the first coil (3) is wound on upper 250 circles of the first iron core (1).
5. the sampler of pincerlike current in resistance property instrument transformer as claimed in claim 2, is characterized in that, described the second coil (4) is wound on the second iron core (2) counterclockwise.
6. the sampler of pincerlike current in resistance property instrument transformer as claimed in claim 5, is characterized in that, described the second coil (4) is wound on upper 250 circles of the second iron core (2).
7. the sampler of pincerlike current in resistance property instrument transformer as claimed in claim 2, is characterized in that, described tertiary coil (5) is wound on double-iron core clockwise.
8. the sampler of pincerlike current in resistance property instrument transformer as claimed in claim 7, is characterized in that, described tertiary coil (5) is wound on 500 circles on double-iron core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510136048.XA CN104715913B (en) | 2015-03-26 | 2015-03-26 | Pincerlike current in resistance property transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510136048.XA CN104715913B (en) | 2015-03-26 | 2015-03-26 | Pincerlike current in resistance property transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104715913A true CN104715913A (en) | 2015-06-17 |
| CN104715913B CN104715913B (en) | 2016-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510136048.XA Active CN104715913B (en) | 2015-03-26 | 2015-03-26 | Pincerlike current in resistance property transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505490A (en) * | 2017-09-08 | 2017-12-22 | 广东电网有限责任公司东莞供电局 | It is a kind of to run the method that current transformer is installed at arrester ground downlead |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB742513A (en) * | 1953-09-09 | 1955-12-30 | Harry Howe | Improvements in and relating to voltage stabilisation devices for a.c. circuits |
| CN2107705U (en) * | 1990-12-29 | 1992-06-17 | 章志桐 | Double-division type current transformer |
| CN102401853A (en) * | 2011-11-28 | 2012-04-04 | 河北工业大学 | Double-shaft fluxgate current sensor |
-
2015
- 2015-03-26 CN CN201510136048.XA patent/CN104715913B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB742513A (en) * | 1953-09-09 | 1955-12-30 | Harry Howe | Improvements in and relating to voltage stabilisation devices for a.c. circuits |
| CN2107705U (en) * | 1990-12-29 | 1992-06-17 | 章志桐 | Double-division type current transformer |
| CN102401853A (en) * | 2011-11-28 | 2012-04-04 | 河北工业大学 | Double-shaft fluxgate current sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505490A (en) * | 2017-09-08 | 2017-12-22 | 广东电网有限责任公司东莞供电局 | It is a kind of to run the method that current transformer is installed at arrester ground downlead |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104715913B (en) | 2016-11-16 |
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