CN103236381B - A kind of type of resistance to surge Thermal Cutoffs - Google Patents
A kind of type of resistance to surge Thermal Cutoffs Download PDFInfo
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- CN103236381B CN103236381B CN201310058492.5A CN201310058492A CN103236381B CN 103236381 B CN103236381 B CN 103236381B CN 201310058492 A CN201310058492 A CN 201310058492A CN 103236381 B CN103236381 B CN 103236381B
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- hitching post
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Abstract
The present invention relates to a kind of type of resistance to surge Thermal Cutoffs, comprise thick copper sheet, scale copper, locating piece, first hitching post, second hitching post, first pin, second pin, spring, temperature sensing bars, shell and cover plate, described thick copper sheet is fixed on described enclosure, affixed first pin of described thick copper sheet, affixed second pin of described scale copper, described temperature sensing bars is connected between described thick copper sheet and scale copper, the side that described thick copper sheet is relative to scale copper is respectively fitted with the first corresponding hitching post and the second hitching post, described spring is extruded and is installed between the first hitching post and the second hitching post, potting resin is filled in described enclosure.This type of resistance to surge Thermal Cutoffs has certain through-current capability, can bear the impact of certain surge current; Have again excellent induced environment temperature simultaneously and cut off the breaking capacity of operating current, its operation principle and working method novel, rational in infrastructure, security performance is good.
Description
Technical field
The present invention relates to a kind of fuse, the especially a kind of type of resistance to surge Thermal Cutoffs.
Background technology
At present due to the maximum surge current tolerance of existing alloy-type temperature fuse and operating current breaking capacity limited, be usually less than the maximum surge current tolerance of lightning protection device; Having large surge impact to come temporarily, Thermal Cutoffs will disconnect in advance, inhibits the surge absoption ability of lightning protection device, therefore cannot realize the normal surging prevention to place system.And alloy-type temperature fuse is under inrush current shock, the distance that in fusing process, B alloy wire disconnects is started from scratch increase, and can produce certain electric arc, the size of arc energy is directly proportional to the size of electric current, voltage in loop; Under the impact of surge current, electric arc will produce Thermal Cutoffs and destroy or cause and cannot normally disconnect, and even cause fire.
Secondly, due to starlike reed and the silver-plated pin pier nose of organic type Thermal Cutoffs, there is certain contact resistance in starlike reed and silver-plated copper shell, after inrush current shock, electric current welding phenomena may occur, cause permanent short; Under big current surge impact, because of the structure and material problem of organic type Thermal Cutoffs, easily burst.The maximum rated current of organic type Thermal Cutoffs is 16A, and rated voltage is 250V, cannot bear larger surge current.
Therefore, develop and aly can bear certain surge current, have again the fuse of enough operating current breaking capacity to be the object of our the present invention research.
Summary of the invention
The invention reside in and provide one can bear certain surge current, the one type of the resistance to surge Thermal Cutoffs of enough operating current breaking capacity can be had again.
Technical scheme provided by the invention is as follows:
A kind of type of resistance to surge Thermal Cutoffs, comprise thick copper sheet, scale copper, locating piece, first hitching post, second hitching post, first pin, second pin, spring, temperature sensing bars, shell and cover plate, described thick copper sheet is fixed on described enclosure, affixed first pin of described thick copper sheet, affixed second pin of described scale copper, described temperature sensing bars is connected between described thick copper sheet and scale copper, the side that described thick copper sheet is relative to scale copper is respectively fitted with the first corresponding hitching post and the second hitching post, described spring is extruded and is installed between the first hitching post and the second hitching post, potting resin is filled in described enclosure.
The position that described cover plate contacts with the first pin and the second pin, cover plate and shell seam crossing have all watered sealing resin.
Described thick copper sheet is fixed in described enclosure by described locating piece.
The fusing point of described potting resin is more than or equal to 50 DEG C.
Described temperature sensing bars fusing-off temperature scope is 60-230 DEG C.
The invention has the advantages that:
This type of resistance to surge Thermal Cutoffs and piezo-resistance are often connected on the passage that surge current enters, be connected to the power input of protected equipment, when having surge current in circuit, the low-resistance linearisation of piezo-resistance progressively aggravates, the pernicious increase of leakage current and concentrate flow into weak spot, weak spot material melts, after forming the short circuit hole of 1k about Ω, the electric current that surge continues promotion one larger pours into short dot, and form high heat, at this moment circuit just has ablaze danger; Now, the type of resistance to surge Thermal Cutoffs induced environment temperature, when temperature is greater than 50 DEG C, potting resin melts, and when temperature rises to set action temperature, temperature sensing bars starts to melt; When the pulling force that temperature sensing bars can bear is less than spring force, under the effect of spring force, scale copper and the second hitching post depart from original position, and circuit is cut off, and avoids the ignition of circuit.Now, enclosure is full of non-conductive liquid underfill resin solution, so cannot form electric arc, avoids producing Thermal Cutoffs destroying or causing and cannot normally disconnect, even causes the possibility of fire.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is stereoscopic figure of the present invention.
Fig. 3 is the mode of connection of typical single-phase surging prevention.
Fig. 4 is the mode of connection of typical three-phase surging prevention.
Fig. 5 is the standard impulse voltage 1.2/50us oscillogram in surge impact of the present invention experiment.
Fig. 6 is the standard impulse current 8/20us oscillogram in surge impact of the present invention experiment.
Embodiment
A kind of preferred embodiment of the present invention:
With reference to figure 1, Fig. 2, a kind of type of resistance to surge Thermal Cutoffs, comprise thick copper sheet 1, scale copper 2, locating piece 3, first hitching post 4, second hitching post 5, first pin 6, second pin 7, spring 8, temperature sensing bars 9, shell 10 and cover plate 11, described thick copper sheet 1 is fixed in the inside of described shell 10 by a positioning block 3, affixed first pin 6 of described thick copper sheet 1, affixed second pin 7 of described scale copper 2, described temperature sensing bars 9 is connected between described thick copper sheet 1 and scale copper 2, the side that described thick copper sheet 1 is relative to scale copper 2 is respectively fitted with the first corresponding hitching post 4 and the second hitching post 5, described temperature sensing bars 9 is connected between described first hitching post 4 and the second hitching post 5, described spring 8 is extruded and is installed between the first hitching post 4 and the second hitching post 5, potting resin (mark) is filled in described shell 10 inside, the fusing point of described potting resin is more than or equal to 50 DEG C, the fusing-off temperature scope of described temperature sensing bars 9 is 60-230 DEG C.
Sealing resin (mark) has all been watered with shell 10 seam crossing in the position that described cover plate 11 contacts with the first pin 6 and the second pin 7, described cover plate 11, good to ensure its sealing.
With reference to figure 3, Fig. 4, this type of resistance to surge Thermal Cutoffs TCO and piezo-resistance VSR are often connected on the passage that surge current enters, and are connected to the power input of protected equipment, when having surge current in circuit, the low-resistance linearisation of piezo-resistance VSR progressively aggravates, the pernicious increase of leakage current and concentrate flow into weak spot, weak spot material melts, after forming the short circuit hole of 1k about Ω, the electric current that surge continues promotion one larger pours into short dot, and form high heat, at this moment circuit just has ablaze danger; Now, the type of resistance to surge Thermal Cutoffs TCO induced environment temperature, when temperature is greater than 50 DEG C, its potting resin melts; When temperature rises to set action temperature, temperature sensing bars starts to melt; When the pulling force that temperature sensing bars 9 can bear is less than spring 8 elastic force, under the elastic force effect of spring 8, scale copper 2 and the second hitching post 5 depart from original position, and circuit is cut off, and avoids the ignition of circuit.Now, enclosure is full of non-conductive liquid underfill resin solution, so cannot form electric arc, avoids destroying producing Thermal Cutoffs or causing and cannot normally disconnect, even causes the possibility of fire.
For confirming that its performance safety is reliable, meeting the national standard that surge experiment is relevant, this type of resistance to surge Thermal Cutoffs being carried out to the surge impact laboratory test of authorized by state.
As shown in Figure 5, the standard impulse current 8/20us oscillogram in surge impact experiment as shown in Figure 6 for standard impulse voltage 1.2/50us waveform in surge impact experiment.Its detailed surge impact voltage tester data are as shown in table 1, and surge impact testing current data are as shown in table 2.
table 1: surge impact voltage tester data
table 2: surge impact testing current data
In sum, this type of resistance to surge Thermal Cutoffs has certain through-current capability, can bear the impact of certain surge current; Have again excellent induced environment temperature simultaneously and cut off the breaking capacity of operating current, its operation principle and working method novel, rational in infrastructure, security performance is good.
Above are only a specific embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (3)
1. the type of a resistance to surge Thermal Cutoffs, comprise thick copper sheet, scale copper, locating piece, first hitching post, second hitching post, first pin, second pin, spring, temperature sensing bars, shell and cover plate, it is characterized in that: described thick copper sheet is fixed on described enclosure, affixed first pin of described thick copper sheet, affixed second pin of described scale copper, described temperature sensing bars is connected between described thick copper sheet and scale copper, the side that described thick copper sheet is relative to scale copper is respectively fitted with the first corresponding hitching post and the second hitching post, described spring is extruded and is installed between the first hitching post and the second hitching post, potting resin is filled in described enclosure, the fusing point of described potting resin is more than or equal to 50 DEG C, described temperature sensing bars fusing-off temperature scope is 60-230 DEG C.
2. the one type of resistance to surge Thermal Cutoffs according to claim 1, is characterized in that: the position that described cover plate contacts with the first pin and the second pin, cover plate and shell seam crossing have all watered sealing resin.
3. the one type of resistance to surge Thermal Cutoffs according to claim 1, is characterized in that: described thick copper sheet is fixed in described enclosure by described locating piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310058492.5A CN103236381B (en) | 2013-02-25 | 2013-02-25 | A kind of type of resistance to surge Thermal Cutoffs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310058492.5A CN103236381B (en) | 2013-02-25 | 2013-02-25 | A kind of type of resistance to surge Thermal Cutoffs |
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| Publication Number | Publication Date |
|---|---|
| CN103236381A CN103236381A (en) | 2013-08-07 |
| CN103236381B true CN103236381B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310058492.5A Active CN103236381B (en) | 2013-02-25 | 2013-02-25 | A kind of type of resistance to surge Thermal Cutoffs |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110648886A (en) * | 2019-09-21 | 2020-01-03 | 天宇匹克电子(惠州)有限公司 | Small thermal fuse link with double insulators |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1826780A1 (en) * | 2004-12-13 | 2007-08-29 | Zhonghou Xu | Varistor with an alloy-type temperature fuse |
| CN101764005A (en) * | 2010-01-05 | 2010-06-30 | 中达电通股份有限公司 | Alarm type thermal fuse-link |
| CN101847858A (en) * | 2010-05-20 | 2010-09-29 | 曾献昌 | Lightning-protection fuse with reliable alarm and overvoltage surge protection device thereof |
| CN102456996A (en) * | 2011-04-12 | 2012-05-16 | 厦门赛尔特电子有限公司 | Lightning-protecting module for lightning-protecting socket |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0614096A2 (en) * | 2005-08-04 | 2011-03-09 | Tyco Electronics Raychem Kk | electrical composite element |
| CN103503255A (en) * | 2011-02-10 | 2014-01-08 | 凤凰通讯发展及制造股份有限公司 | Pluggable surge protection system |
-
2013
- 2013-02-25 CN CN201310058492.5A patent/CN103236381B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1826780A1 (en) * | 2004-12-13 | 2007-08-29 | Zhonghou Xu | Varistor with an alloy-type temperature fuse |
| CN101764005A (en) * | 2010-01-05 | 2010-06-30 | 中达电通股份有限公司 | Alarm type thermal fuse-link |
| CN101847858A (en) * | 2010-05-20 | 2010-09-29 | 曾献昌 | Lightning-protection fuse with reliable alarm and overvoltage surge protection device thereof |
| CN102456996A (en) * | 2011-04-12 | 2012-05-16 | 厦门赛尔特电子有限公司 | Lightning-protecting module for lightning-protecting socket |
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| Publication number | Publication date |
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| CN103236381A (en) | 2013-08-07 |
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Address after: No.6, Hongjian Road, jiaomei Town, Taiwan investment zone, Zhangzhou City, Fujian Province, 363000 Patentee after: Zhangzhou Yabao Electronics Co.,Ltd. Address before: 363107 Hongjian Industrial Zone, Longchi Development Zone, Zhangzhou City, Fujian Province Patentee before: ZHANGZHOU YABAO ELECTRONIC Co.,Ltd. |
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