CN101840776A - Secondary open-circuit over-voltage protection device of current mutual inductor - Google Patents
Secondary open-circuit over-voltage protection device of current mutual inductor Download PDFInfo
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- CN101840776A CN101840776A CN 201010187225 CN201010187225A CN101840776A CN 101840776 A CN101840776 A CN 101840776A CN 201010187225 CN201010187225 CN 201010187225 CN 201010187225 A CN201010187225 A CN 201010187225A CN 101840776 A CN101840776 A CN 101840776A
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- box body
- insulation box
- protection device
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- mutual inductor
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Abstract
The invention relates to a protection device of a current mutual inductor, and discloses a secondary open-circuit over-voltage protection device of a current mutual inductor, which comprises an insulation box body, an upper and a lower electrodes which are arranged on the upper and the lower bottom surfaces of the insulation box body, and a flat electrode which is arranged in the middle of the insulation box body, wherein the flat electrode is arranged between the upper and the lower electrodes; the flat electrode is led out of the insulation box body to be grounded, and the upper and the lower electrodes are respectively led out of the insulation box body through an upper and a lower terminals to be electrically connected with a secondary leading wire of the current mutual indictor, and the upper and the lower terminals are respectively connected with the insulation box body through threads.
Description
Technical field
The present invention relates to protector of current mutual inductor, particularly a kind of secondary open-circuit over-voltage protection device of current mutual inductor.
Background technology
At present, secondary open-circuit over-voltage protection device of current mutual inductor, one has two kinds of forms: a kind of electronic circuit that utilizes is realized open-circuit-protection, need external power supply, circuit is realized complicated, and the reliability of protection is subjected to the influence of the power supply degree of reliability, and the breaking point of this protective device when secondary circuit failure be in the Current Transformer Secondary outlet terminal near during the position, secondary circuit after just can only the protective current instrument transformer, protective current instrument transformer itself reliably; Another kind then utilizes air gap and discharge tube to realize the protection of Current Transformer Secondary open-circuit over-voltage, and overvoltage numerical value is non-adjustable.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of secondary open-circuit over-voltage protection device of current mutual inductor is provided, it is simple in structure, be convenient to install, and does not need accessory power supply, and overvoltage numerical value is easy to adjust.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A kind of secondary open-circuit over-voltage protection device of current mutual inductor is characterized in that, comprises the insulation box body, is arranged on the upper and lower electrode of the upper and lower bottom surface of insulation box body, and is arranged on the plate electrode in the middle of the insulation box body, and plate electrode is between upper and lower electrode; Plate electrode is drawn insulation box body ground connection, and upper and lower electrode is drawn the secondary lead wires that the insulation box body is electrically connected current transformer by upper and lower binding post respectively, and upper and lower binding post respectively with the insulation box body by being threaded.
Further improvement of the present invention is: described upper and lower electrode all adopts needle electrode.
A sidewall of described insulation box body is provided with the line ball chamber, level is communicated with the fairlead in line ball chamber and the screw hole in vertical connection line ball chamber; Described plate electrode level stretches into the line ball chamber, and the screw hole internal thread is connected with clamping screw, and the clamping screw bottom is provided with tension disc, and tension disc is over against the end of plate electrode.Of the present invention further the improvement is: another sidewall of described insulation box body is outside equipped with the guide-track groove that is used to install.
The present invention is in the insulation box body, the upper and lower bottom surface of insulation box body is provided with upper and lower electrode, in the middle of the insulation box body plate electrode is set, plate electrode is between upper and lower electrode, plate electrode is drawn insulation box body ground connection, upper and lower electrode is drawn the secondary lead wires that the insulation box body is electrically connected current transformer by upper and lower binding post respectively, and upper and lower binding post respectively with the insulation box body by being threaded, can conveniently regulate the discharging gap of they and plate electrode by upper and lower binding post, and then reach and set the purpose that overvoltage numerical value gets.
In addition, a sidewall of insulation box body is provided with the line ball chamber, the level that are used for plate electrode and is communicated with the fairlead in line ball chamber and the screw hole in vertical connection line ball chamber, the plate electrode level stretches into the line ball chamber, the screw hole internal thread is connected with clamping screw, the clamping screw bottom is provided with tension disc, tension disc makes things convenient for the lead-in wire of plate electrode to connect over against the end of plate electrode.Another sidewall of insulation box body is outside equipped with the guide-track groove that is used to install, and makes things convenient for the actual installation of this device.
In sum, the present invention is simple in structure, be convenient to install, and do not need accessory power supply, and overvoltage numerical value is easy to adjust.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further details.
Fig. 1 is the structural representation of a kind of secondary open-circuit over-voltage protection device of current mutual inductor of the present invention; Among the figure: 1, insulation box body; 2, plate electrode; 3, go up binding post; 4, top electrode; 5, following binding post; 6, bottom electrode; 7, line ball chamber; 8, clamping screw; 9, tension disc; 10, fairlead; 11, guide-track groove; 12, guide rail.
Embodiment
With reference to Fig. 1, be a kind of secondary open-circuit over-voltage protection device of current mutual inductor of the present invention.The upper and lower underrun upper and lower binding post 3,5 that is threaded at insulation box body 1, the inner of upper and lower binding post 3,5 is provided with upper and lower electrode 4,6, upper and lower electrode 4,6 all adopts needle electrode, and the outer end of upper and lower binding post 3,5 is electrically connected the secondary terminal of current transformer respectively by the mode of nut line ball.In the middle of the insulation box body 1 plate electrode 2 is set, plate electrode 2 is between upper and lower electrode 4,6.
The right side wall of insulation box body 1 is provided with line ball chamber 7, level is communicated with the fairlead 10 in line ball chamber 7 and the screw hole in vertical connection line ball chamber, plate electrode 2 levels stretch into line ball chamber 7, the screw hole internal thread connects clamping screw 8, clamping screw 8 bottoms are provided with tension disc 9, tension disc 9 is over against the end of plate electrode 2, the end that goes between is crimped between tension disc 9 and the plate electrode 2, and the other end is drawn insulation box body 1 ground connection by fairlead 10.The right side wall of insulation box body 1 is outside equipped with the guide-track groove 11 that is used to install, and the guide rail 12 in guide-track groove 11 and the power distribution cabinet cooperatively interacts.
The overall structure of this practicality example is simple, be convenient to install, and do not need accessory power supply, and overvoltage numerical value is easy to adjust.
Claims (4)
1. secondary open-circuit over-voltage protection device of current mutual inductor, it is characterized in that, comprise the insulation box body, be arranged on the upper and lower electrode of the upper and lower bottom surface of insulation box body, and being arranged on the middle plate electrode of insulation box body, plate electrode is between upper and lower electrode; Plate electrode is drawn insulation box body ground connection, and upper and lower electrode is drawn the secondary lead wires that the insulation box body is electrically connected current transformer by upper and lower binding post respectively, and upper and lower binding post respectively with the insulation box body by being threaded.
2. secondary open-circuit over-voltage protection device of current mutual inductor according to claim 1 is characterized in that, described upper and lower electrode all adopts needle electrode.
3. secondary open-circuit over-voltage protection device of current mutual inductor according to claim 1 is characterized in that, a sidewall of described insulation box body is provided with the line ball chamber, level is communicated with the fairlead in line ball chamber and the screw hole in vertical connection line ball chamber; Described plate electrode level stretches into the line ball chamber, and the screw hole internal thread is connected with clamping screw, and the clamping screw bottom is provided with tension disc, and tension disc is over against the end of plate electrode.
4. secondary open-circuit over-voltage protection device of current mutual inductor according to claim 3 is characterized in that, another sidewall of described insulation box body is outside equipped with the guide-track groove that is used to install.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101872254A CN101840776B (en) | 2010-05-31 | 2010-05-31 | Secondary open-circuit over-voltage protection device of current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101872254A CN101840776B (en) | 2010-05-31 | 2010-05-31 | Secondary open-circuit over-voltage protection device of current mutual inductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101840776A true CN101840776A (en) | 2010-09-22 |
| CN101840776B CN101840776B (en) | 2012-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101872254A Active CN101840776B (en) | 2010-05-31 | 2010-05-31 | Secondary open-circuit over-voltage protection device of current mutual inductor |
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| Country | Link |
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| CN (1) | CN101840776B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916421A (en) * | 2012-10-22 | 2013-02-06 | 深圳供电局有限公司 | Transformer protection mechanism |
| CN103812098A (en) * | 2012-11-12 | 2014-05-21 | 苏州工业园区新宏博通讯科技有限公司 | Current transformer secondary open circuit protection device |
| CN105575637A (en) * | 2015-12-23 | 2016-05-11 | 四方继保（武汉）软件有限公司 | Gas insulated switchgear (GIS) electronic type voltage transformer with suspension plate electrode structure |
| CN108736460A (en) * | 2018-07-25 | 2018-11-02 | 安徽硕日光电科技有限公司 | A kind of current mutual inductor overvoltage protector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01270730A (en) * | 1988-04-20 | 1989-10-30 | Matsushita Electric Ind Co Ltd | Surge absorber |
| DE29624468U1 (en) * | 1996-02-10 | 2004-01-15 | Dehn + Söhne GmbH + Co KG | Arc-current extinction characteristics control method e.g. for spark-gap devices of overvoltage diverters - has interior volume of device housing matched to size of arc current to provide short-term increase in internal pressure as a result of arc |
| CN1933268A (en) * | 2006-09-06 | 2007-03-21 | 中国电力科学研究院 | Controllable gap for protecting transformer neutral point |
-
2010
- 2010-05-31 CN CN2010101872254A patent/CN101840776B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01270730A (en) * | 1988-04-20 | 1989-10-30 | Matsushita Electric Ind Co Ltd | Surge absorber |
| DE29624468U1 (en) * | 1996-02-10 | 2004-01-15 | Dehn + Söhne GmbH + Co KG | Arc-current extinction characteristics control method e.g. for spark-gap devices of overvoltage diverters - has interior volume of device housing matched to size of arc current to provide short-term increase in internal pressure as a result of arc |
| CN1933268A (en) * | 2006-09-06 | 2007-03-21 | 中国电力科学研究院 | Controllable gap for protecting transformer neutral point |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916421A (en) * | 2012-10-22 | 2013-02-06 | 深圳供电局有限公司 | Transformer protection mechanism |
| CN102916421B (en) * | 2012-10-22 | 2014-11-26 | 深圳供电局有限公司 | Transformer protection mechanism |
| CN103812098A (en) * | 2012-11-12 | 2014-05-21 | 苏州工业园区新宏博通讯科技有限公司 | Current transformer secondary open circuit protection device |
| CN103812098B (en) * | 2012-11-12 | 2016-08-03 | 苏州新宏博智能科技股份有限公司 | Second open circuit protector of current mutual inductor |
| CN105575637A (en) * | 2015-12-23 | 2016-05-11 | 四方继保（武汉）软件有限公司 | Gas insulated switchgear (GIS) electronic type voltage transformer with suspension plate electrode structure |
| CN105575637B (en) * | 2015-12-23 | 2017-11-24 | 四方继保（武汉）软件有限公司 | A kind of GIS electronic type voltage transformers of suspension plate electrode structures |
| CN108736460A (en) * | 2018-07-25 | 2018-11-02 | 安徽硕日光电科技有限公司 | A kind of current mutual inductor overvoltage protector |
| CN108736460B (en) * | 2018-07-25 | 2023-11-24 | 合肥森岑汽车用品有限公司 | Overvoltage protector for current transformer |
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| Publication number | Publication date |
|---|---|
| CN101840776B (en) | 2012-05-23 |
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