CN203103939U - Secondary overvoltage protector for current transformer - Google Patents
Secondary overvoltage protector for current transformer Download PDFInfo
- Publication number
- CN203103939U CN203103939U CN 201220720976 CN201220720976U CN203103939U CN 203103939 U CN203103939 U CN 203103939U CN 201220720976 CN201220720976 CN 201220720976 CN 201220720976 U CN201220720976 U CN 201220720976U CN 203103939 U CN203103939 U CN 203103939U
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- current transformer
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- secondary overvoltage
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- signal processing
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Abstract
The utility model discloses a secondary overvoltage protector for a current transformer, which relates to the technical field of protection for current transformers. The secondary overvoltage protector is characterized by comprising an input end, a signal processing end electrically connected to the rear side of the input end, a single chip electrically connected to the rear side of the signal processing end, as well as a troubleshooting end, a remote reset end and a relay output control end connected with the single chip. The secondary overvoltage protector disclosed by the utility model is reasonable in design, good in protection effect for the secondary overvoltage of the current transformer, safe and reliable, and convenient to use.
Description
Technical field:
The utility model relates to current transformer resist technology field, specifically is the Current Transformer Secondary overvoltage protection device.
Background technology:
The current transformer principle is according to electromagnetic induction principle.Current transformer is made up of the iron core and the winding of closure.The current transformer of secondary winding Y-connection has three phase connection terminal A, B and C, and a public terminal N.In the prior art, secondary winding in current transformer and loop thereof the open circuit that in a single day is in operation will produce the overvoltage of thousands of volts even volts up to ten thousand.This works the mischief not only for the insulation of electrical secondary system, also can make the too drastic and scaling loss of instrument transformer, even the life security that jeopardizes the operations staff.
The utility model content:
Technical problem to be solved in the utility model is to provide a kind of overvoltage that produces when being used for limiting second open circuit specially, and has manually or the Current Transformer Secondary overvoltage protection device of auto-reset function after having action connection point output, automatic luminous demonstration, automatic blocking differential protection, action.
Technical problem to be solved in the utility model adopts following technical scheme to realize:
The Current Transformer Secondary overvoltage protection device; it is characterized in that: comprise input; be connected electrically in the signal processing end of input rear side, electrically connect the single-chip microcomputer at signal processing end rear side, the fault that also comprises that is connected with single-chip microcomputer is got rid of end, remote reset end and relay output control.
Described input comprises A, B, C and N binding post, and A, B and C are phase terminal, and N is public terminal, and A, B, C and a N constitute the input of one group of secondary winding in current transformer.
Described signal processing end is electrically connected with the input of two groups of secondary winding in current transformer.
Described relay output control comprises the output of reporting to the police, indicator light output and control output.
The utility model is applicable to the current transformer of secondary winding Y-connection, A, B, the C that binding post A, the B of protector, C and public terminal N are directly connected to secondary winding in current transformer mutually with secondary neutral N on.If only with A, B(or an A) phase winding, then C(or B, C) mutually can not wiring, can not influence the operate as normal of protector.
The utility model mainly is made of the nonlinear resistance that approaches desirable protective feature.The cross-over connection of Current Transformer Secondary overvoltage protection device is in the secondary winding in current transformer two ends, and leakage current is minimum when normally moving, and is the above high-impedance state of 100M Ω; The voltage that produces during the secondary loop of mutual inductor open circuit is higher than normal working voltage far away, and this moment, the Current Transformer Secondary overvoltage protection device moved rapidly, was the low resistive state of approximate short circuit, effectively over-voltage.
The beneficial effects of the utility model are: the utility model is reasonable in design, and the Current Transformer Secondary overvoltage protection is effective, and is safe and reliable, easy to use.
Description of drawings:
Fig. 1 is the utility model embodiment one schematic diagram.
Fig. 2 is the utility model embodiment two schematic diagrames.
Embodiment:
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Specific embodiment one
As shown in Figure 1; the Current Transformer Secondary overvoltage protection device comprises input, is connected electrically in the signal processing end of input rear side; electrically connect 8 single-chip microcomputers at signal processing end rear side, the fault that also comprises that is connected with single-chip microcomputer is got rid of end, remote reset end and relay output control.Input comprises A, B, C and N binding post, and A, B and C are phase terminal, and N is public terminal, and A, B, C and a N constitute the input of one group of secondary winding in current transformer.The signal processing end is electrically connected with the input of two groups of secondary winding in current transformer.Relay output control comprises the output of reporting to the police, indicator light output and control output.
Present embodiment has the input of four groups of secondary winding in current transformer; two signal processing ends; the utility model can provide protection to 12 road secondary loop of mutual inductor; when open circuit, produce voltage; pass through processing of circuit; can allow single-chip microcomputer receive coherent signal, and the mutually required indicator light light on and off of control.And, have or not the output of source contact signal when any one the road or a few road when breaking down.After fault is got rid of,, single-chip microcomputer is restarted, normal operation input work again after the ifs circuit reinstatement attitude by hand-reset button or remote reset.
Specific embodiment two
As described in Figure 2; the operation principle of present embodiment and the course of work are consistent with specific embodiment one; but include only the input of two groups of secondary winding in current transformer at present embodiment, a signal processing end can provide protection to 6 road secondary loop of mutual inductor.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. Current Transformer Secondary overvoltage protection device; it is characterized in that: comprise input; be connected electrically in the signal processing end of input rear side, electrically connect the single-chip microcomputer at signal processing end rear side, the fault that also comprises that is connected with single-chip microcomputer is got rid of end, remote reset end and relay output control.
2. Current Transformer Secondary overvoltage protection device according to claim 1; it is characterized in that: described input comprises A, B, C and N binding post; A, B and C are phase terminal, and N is public terminal, and A, B, C and a N constitute the input of one group of secondary winding in current transformer.
3. Current Transformer Secondary overvoltage protection device according to claim 2 is characterized in that: described signal processing end is electrically connected with the input of two groups of secondary winding in current transformer.
4. Current Transformer Secondary overvoltage protection device according to claim 1 is characterized in that: described relay output control comprises the output of reporting to the police, indicator light output and control output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220720976 CN203103939U (en) | 2012-12-24 | 2012-12-24 | Secondary overvoltage protector for current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220720976 CN203103939U (en) | 2012-12-24 | 2012-12-24 | Secondary overvoltage protector for current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203103939U true CN203103939U (en) | 2013-07-31 |
Family
ID=48855316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220720976 Expired - Lifetime CN203103939U (en) | 2012-12-24 | 2012-12-24 | Secondary overvoltage protector for current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203103939U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044648A (en) * | 2015-08-13 | 2015-11-11 | 国家电网公司 | AVR single-chip microcomputer current transformer secondary anti-open-circuit system |
| CN107171306A (en) * | 2017-07-01 | 2017-09-15 | 合肥东玖电气有限公司 | A kind of Current Transformer Secondary dypass voltage protector |
| CN107171286A (en) * | 2017-07-01 | 2017-09-15 | 合肥东玖电气有限公司 | A kind of Current Transformer Secondary side overvoltage protection |
| CN108075461A (en) * | 2017-07-01 | 2018-05-25 | 合肥东玖电气有限公司 | A kind of Current Transformer Secondary side overvoltage protection |
-
2012
- 2012-12-24 CN CN 201220720976 patent/CN203103939U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044648A (en) * | 2015-08-13 | 2015-11-11 | 国家电网公司 | AVR single-chip microcomputer current transformer secondary anti-open-circuit system |
| CN107171306A (en) * | 2017-07-01 | 2017-09-15 | 合肥东玖电气有限公司 | A kind of Current Transformer Secondary dypass voltage protector |
| CN107171286A (en) * | 2017-07-01 | 2017-09-15 | 合肥东玖电气有限公司 | A kind of Current Transformer Secondary side overvoltage protection |
| CN108075461A (en) * | 2017-07-01 | 2018-05-25 | 合肥东玖电气有限公司 | A kind of Current Transformer Secondary side overvoltage protection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210108 Address after: 231100 Shuangfeng Road North 28, Shuangfeng Economic Development Zone, Changfeng County, Hefei, Anhui Patentee after: ANHUI HEKAI ELECTRICAL TECHNOLOGY Co.,Ltd. Address before: 201515 room 206, East Building, 80 Qianfu Road, Jinshanwei Town, Jinshan District, Shanghai Patentee before: SHANGHAI ZHONGFEI POWER EQUIPMENT Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |