CN103812098B - Second open circuit protector of current mutual inductor - Google Patents
Second open circuit protector of current mutual inductor Download PDFInfo
- Publication number
- CN103812098B CN103812098B CN201210449719.4A CN201210449719A CN103812098B CN 103812098 B CN103812098 B CN 103812098B CN 201210449719 A CN201210449719 A CN 201210449719A CN 103812098 B CN103812098 B CN 103812098B
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- transformer
- normally closed
- hole
- mutual inductor
- open circuit
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Abstract
The present invention provides a kind of second open circuit protector of current mutual inductor; including insulation upper cover, PCB panel and insulation lower cover; face terminals, normally closed normal open switch, display lamp and transformer terminal it is welded with on described PCB panel; described face terminals connects load; described transformer terminal connects transformer, and when normally closed normal open switch is in normally off, transformer is directly connected with load; when normally closed normal open switch is in normally open, transformer two ends are connected.The present invention is simple to operate, only need to use normally closed normal open switch, is turned at current transformer two ends, after confirming that current transformer two ends have been turned on, just safely current transformer can be carried out patching operations.
Description
Technical field
The present invention relates to power domain, particularly relate to the protection device of a kind of high-low pressure current transformer.
Background technology
Current transformer is a kind of wide variety of electrical equipment, may act on and detects the electic protection of electric current in alternating current circuit and use.Its principle is that big electric current is converted to small area analysis to scale, then the small area analysis that regulation ratio is changed is supplied to various metering, relay protection and automaton use.Electrical secondary system is isolated by it with high voltage installation in the process, so that it is guaranteed that the person and equipment safety.Current transformer be in operation secondary side do not allow open circuit; once secondary side open circuit; very high voltage will be produced, jeopardize personal safety, impact metering, protection device and the operation of electronic load; secondary insulating is caused to puncture; and making current transformer magnetic circuit supersaturation, iron core generates heat, and burns out current transformer; it is also possible to initiation fire, causes a serious accident.Though having many kinds of measures to avoid the generation of open circuit accident at present, such as power operation, or transformer is pulled down the modes such as wiring again, but power equipment is in operation and power-off and the complexity pulled down by transformer can not limit to these measures and all can not well implement.
Therefore a kind of problem for protecting the person and equipment second open circuit protector of current mutual inductor safe, the most succinct but also reliable to need solution in becoming current industry badly is designed.
Summary of the invention
It is an object of the invention to provide a kind of second open circuit protector of current mutual inductor.
Correspondingly; a kind of second open circuit protector of current mutual inductor of the present invention; including insulation upper cover, PCB panel and insulation lower cover; being welded with face terminals, normally closed normal open switch, display lamp and transformer terminal on described PCB panel, described face terminals connects load, and described transformer terminal connects current transformer; when normally closed normal open switch is in normally off; current transformer is directly connected with load, and when normally closed normal open switch is in normally open, current transformer two ends are connected；Being covered with cavity and some support columns within the cavity under described insulation, support column is provided with screw thread, and the bottom of insulation lower cover is provided with the guide-track groove for installing.
As a further improvement on the present invention, described insulation covers it is provided with switch resigning hole, display lamp resigning hole, face terminals installing hole and transformer terminal mounting hole.
As a further improvement on the present invention, described insulation being covered with wiring hole, described insulation upper cover passes through wiring hole screw locking at support column.
As a further improvement on the present invention, described PCB panel is provided with hole, location, and described PCB panel is by positioning hole screw locking at support column.
The invention has the beneficial effects as follows: simple to operate, only need to use normally closed normal open switch, current transformer two ends are turned on, after confirming that current transformer two ends have been turned on, just safely current transformer can be carried out patching operations.
Accompanying drawing explanation
Fig. 1 show the three-dimensional exploded view of an embodiment of the present invention second open circuit protector of current mutual inductor；
Fig. 2 A show the circuit theory diagrams that normally closed normal open switch is under normally off；
Fig. 2 B show the circuit theory diagrams that normally closed normal open switch is under normally open.
Detailed description of the invention
Describe the present invention below with reference to detailed description of the invention shown in the drawings.But these embodiments are not limiting as the present invention, structure, method or conversion functionally that those of ordinary skill in the art is made according to these embodiments are all contained in protection scope of the present invention.
As shown in Figure 1, Figure 2 shown in A, Fig. 2 B, an embodiment of the present invention second open circuit protector of current mutual inductor includes insulate upper cover 1, PCB panel 2 and insulation lower cover 3.
Insulation upper cover 1 sidewall is provided with some wiring holes 11, and top is provided with switch resigning hole 12, display lamp resigning hole 13, face terminals installing hole 14 and transformer terminal mounting hole 15.Insulation lower cover 3 includes cavity 31 and is positioned at some support columns 32 of cavity 31, and support column 32 is provided with screw thread, and the bottom of insulation lower cover 3 is provided with the guide-track groove (not shown) for installing.Face terminals 21, normally closed normal open switch 22, display lamp 23 and transformer terminal 24 it is welded with, it addition, the side of PCB panel 2 is provided with hole, some location 25 above PCB panel 2.
When specifically installing, first face terminals 21, normally closed normal open switch 22, display lamp 23 and transformer terminal 24 are welded on PCB panel 2, then PCB panel 2 is put into the cavity 31 of insulation lower cover 3, it is locked on the support column 32 in insulation lower cover 3 by the screw 4 of the hole, some location 25 on PCB panel 2, thus realizes fixing PCB panel 2；Then insulation upper cover 1 is placed on insulation lower cover 3, it is locked on the support column 32 in insulation lower cover 3 by the screw 4 of the some wiring holes 11 on insulation upper cover 1, thus realize fixing insulation upper cover 1, now, face terminals 21 is installed on face terminals installing hole 14, transformer terminal 24 is installed on transformer terminal mounting hole 15, and normally closed normal open switch 22 is positioned at switch resigning hole 12, and display lamp 23 is positioned at display lamp resigning hole 13；Finally this protection device is installed on DIN35mm standard rail (not shown), thus realizes this protection device is fixed.
During concrete operations, load being accessed face terminals 21, current transformer accesses transformer terminal 24, by operating the defencive function that normally closed normal open switch 22 realizes avoiding Current Transformer Secondary side to open a way.When switch is kept closed and turns on current transformer S1 end, then transformer is directly connected with load, and transformer keeps normal work.When operator need to change current transformer or change circuit, then toggle switch or when being controlled switching toggle by automaton, then switch and transformer S1 and S2 two ends are connected, thus avoid transformer to open a way phenomenon, can safely transformer be operated.
Second open circuit protector of current mutual inductor of the present invention has the advantages that
The most simple to operate, only need to use normally closed normal open switch, current transformer two ends S1 Yu S2 is turned on, after confirming that current transformer two ends have been turned on, just safely current transformer can be carried out patching operations, it is achieved the second open circuit of current transformer is protected；
2. can accomplish energising time can normal operating, satisfied load does not allow the job requirement of power operation；Simple for structure reliably, greatly reduce manufacturing cost；
3. can be widely applied to single-phase, threephase load, it is possible to be applied to list, multichannel loading；
4. between current transformer and normally closed normal open switch, it is provided with display lamp, whether is had been turned on by display lamp light confirmation current transformer two ends, thus allow operator can see running status more intuitively, after guaranteeing that on off state is correct, then current transformer is carried out patching operations.
It is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should be using description as an entirety, technical scheme in each embodiment can also form, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that.
The a series of detailed description of those listed above is only for illustrating of the feasibility embodiment of the present invention; they also are not used to limit the scope of the invention, and all equivalent implementations or changes made without departing from skill of the present invention spirit should be included within the scope of the present invention.
Claims (4)
1. a second open circuit protector of current mutual inductor; it is characterized in that: include insulate upper cover, PCB panel and insulation lower cover; face terminals, normally closed normal open switch, display lamp and transformer terminal it is welded with on described PCB panel; described face terminals connects load; described transformer terminal connects current transformer, and when normally closed normal open switch is in normally off, current transformer is directly connected with load; when normally closed normal open switch is in normally open, current transformer two ends are connected；Being covered with cavity and some support columns within the cavity under described insulation, support column is provided with screw thread, and the bottom of insulation lower cover is provided with the guide-track groove for installing.
Second open circuit protector of current mutual inductor the most according to claim 1, it is characterised in that: cover in described insulation and be provided with switch resigning hole, display lamp resigning hole, face terminals installing hole and transformer terminal mounting hole.
Second open circuit protector of current mutual inductor the most according to claim 2, it is characterised in that: being covered with wiring hole in described insulation, described insulation upper cover passes through wiring hole screw locking at support column.
Second open circuit protector of current mutual inductor the most according to claim 3, it is characterised in that: described PCB panel is provided with hole, location, and described PCB panel is by positioning hole screw locking at support column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210449719.4A CN103812098B (en) | 2012-11-12 | 2012-11-12 | Second open circuit protector of current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210449719.4A CN103812098B (en) | 2012-11-12 | 2012-11-12 | Second open circuit protector of current mutual inductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103812098A CN103812098A (en) | 2014-05-21 |
| CN103812098B true CN103812098B (en) | 2016-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210449719.4A Expired - Fee Related CN103812098B (en) | 2012-11-12 | 2012-11-12 | Second open circuit protector of current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103812098B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510863A (en) * | 2016-01-20 | 2016-04-20 | 国网上海市电力公司 | Short-circuiting system and short-circuiting method of secondary terminal of mutual inductor |
| CN105510679A (en) * | 2016-01-21 | 2016-04-20 | 江苏省电力公司电力科学研究院 | High-reliability and high-precision current measuring method and device |
| CN110716075A (en) * | 2019-10-10 | 2020-01-21 | 西安科技大学 | Current transformer array switching circuit and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2279725Y (en) * | 1994-10-16 | 1998-04-22 | 陆秀根 | Emergency protector for current transformer |
| CN201142567Y (en) * | 2007-12-13 | 2008-10-29 | 广州霍斯通电气有限公司 | Secondary side open circuit protecting equipment of current mutual inductor |
| WO2009047748A2 (en) * | 2007-10-11 | 2009-04-16 | Israel Electric Corporation | Open circuit in secondary winding protection for current transformers |
| JP2010154631A (en) * | 2008-12-25 | 2010-07-08 | Chugoku Electric Power Co Inc:The | Device for preventing opening of secondary circuit in current transformer for measuring instrument |
| CN101840776A (en) * | 2010-05-31 | 2010-09-22 | 中国西电电气股份有限公司 | Secondary open-circuit over-voltage protection device of current mutual inductor |
| CN202872359U (en) * | 2012-11-12 | 2013-04-10 | 苏州工业园区新宏博通讯科技有限公司 | Secondary open circuit protector of current transformer |
-
2012
- 2012-11-12 CN CN201210449719.4A patent/CN103812098B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2279725Y (en) * | 1994-10-16 | 1998-04-22 | 陆秀根 | Emergency protector for current transformer |
| WO2009047748A2 (en) * | 2007-10-11 | 2009-04-16 | Israel Electric Corporation | Open circuit in secondary winding protection for current transformers |
| CN201142567Y (en) * | 2007-12-13 | 2008-10-29 | 广州霍斯通电气有限公司 | Secondary side open circuit protecting equipment of current mutual inductor |
| JP2010154631A (en) * | 2008-12-25 | 2010-07-08 | Chugoku Electric Power Co Inc:The | Device for preventing opening of secondary circuit in current transformer for measuring instrument |
| CN101840776A (en) * | 2010-05-31 | 2010-09-22 | 中国西电电气股份有限公司 | Secondary open-circuit over-voltage protection device of current mutual inductor |
| CN202872359U (en) * | 2012-11-12 | 2013-04-10 | 苏州工业园区新宏博通讯科技有限公司 | Secondary open circuit protector of current transformer |
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| Publication number | Publication date |
|---|---|
| CN103812098A (en) | 2014-05-21 |
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Address after: 215126 Suzhou City Industrial Park, Suzhou, Su Sheng Tung Road, Hong Kong Street, No. 88 Applicant after: SUZHOU NEWHONGBO INTELLIGENT TECHNOLOGY CO., LTD. Address before: 215126 Suzhou City Industrial Park, Suzhou, Su Sheng Tung Road, Hong Kong Street, No. 88 Applicant before: Suzhou Industrial Prak New Hongbo Communication Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20201112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |