CN103236381A - Surge-resistant type thermal fuse wire - Google Patents
Surge-resistant type thermal fuse wire Download PDFInfo
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- CN103236381A CN103236381A CN2013100584925A CN201310058492A CN103236381A CN 103236381 A CN103236381 A CN 103236381A CN 2013100584925 A CN2013100584925 A CN 2013100584925A CN 201310058492 A CN201310058492 A CN 201310058492A CN 103236381 A CN103236381 A CN 103236381A
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Abstract
The invention relates to a surge-resistant type thermal fuse wire comprising a thick copper piece, a thin copper piece, a positioning block, a first pin, a second pin, a first lead pin, a second lead pin, a spring, a temperature-sensing strip, a casing and a cover board. The thick copper piece fixed inside the casing is fixedly connected with the fist lead pin, and the thin copper piece is fixedly connected with the second lead pin; the temperature-sensing strip is connected between the thick copper strip and the thin copper strip; the first pin and the second pin are respectively assembled on one side of the thick copper piece opposite to the thin copper piece; the spring is mounted between the first pin and the second pin in an extrusion manner; and the inside of the casing is injected with mold resin. The surge-resistant type thermal fuse wire has certain through-current capacities to bear impact of certain surge current, has breaking capacity to sense environment temperature and cutoff working current, has novel working principle and working mode, and has reasonable structure and good safety performance.
Description
Technical field
The present invention relates to a kind of fuse, the especially a kind of type of anti-surge Thermal Cutoffs.
Background technology
Because maximum surge current tolerance and the operating current breaking capacity of existing alloy-type temperature fuse are limited, be usually less than the maximum surge current tolerance of lightning protection device at present; Having big surge impact to come temporarily, Thermal Cutoffs will disconnect in advance, has suppressed the surge absorbability of lightning protection device, therefore can't realize the normal anti-surge protection to the place system.And alloy-type temperature fuse is under surge current impacts, and the distance that the alloy silk disconnects in the fusing process increase of starting from scratch can produce certain electric arc, and the size of electric current, voltage is directly proportional in the size of arc energy and the loop; Under the impact of surge current, electric arc will produce Thermal Cutoffs and destroy or cause and can't normally disconnect, even cause fire.
Secondly, because starlike reed and the silver-plated pin pier nose of organic substance type Thermal Cutoffs, there are certain contact resistance in starlike reed and silver-plated copper shell, after surge current impacts the electric current welding phenomena may take place, and cause permanent short; Under big current surge impacted, explosion easily took place in the structure and material problem because of organic substance type Thermal Cutoffs.The maximum rated current of organic substance type Thermal Cutoffs is 16A, and rated voltage is 250V, can't bear bigger surge current.
Therefore, develop and aly can bear certain surge current, the fuse that enough operating current breaking capacity are arranged again is the purpose of our the present invention research.
Summary of the invention
The invention reside in provides a kind of and can bear certain surge current, and a kind of type of anti-surge Thermal Cutoffs of enough operating current breaking capacity can be arranged again.
Technical scheme provided by the invention is as follows:
A kind of type of anti-surge Thermal Cutoffs, comprise thick copper sheet, scale copper, locating piece, first hitching post, second hitching post, first pin, second pin, spring, the temperature-sensitive bar, 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-sensitive bar is connected between described thick copper sheet and the scale copper, the side that described thick copper sheet is relative with scale copper is respectively fitted with corresponding first hitching post and second hitching post, described spring is extruded and is installed between first hitching post and second hitching post, fills with potting resin in described enclosure.
Described cover plate and first pin and the contacted position of second pin, cover plate and shell seam crossing have all watered and have sealed 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 ℃.
Described temperature-sensitive bar fusing-off temperature scope is 60-230 ℃.
The invention has the advantages that:
This type of anti-surge Thermal Cutoffs and piezo-resistance often are connected on the passage that surge current enters, be connected to the power input of protected equipment, surge current is arranged in circuit, the low-resistance linearisation of piezo-resistance progressively aggravates, the pernicious increase of leakage current and the concentrated weak spot that flows into, and the weak spot material melts, after forming the short circuit hole about 1k Ω, surge continues to promote a bigger electric current and pours into short dot, forms high heat, and at this moment circuit just has ablaze danger; At this moment, the type of anti-surge Thermal Cutoffs induced environment temperature, when temperature during greater than 50 ℃, potting resin melts, and when temperature rises to when setting operating temperature, the temperature-sensitive bar begins to melt; The pulling force that can bear when the temperature-sensitive bar is during less than spring force, and under the effect of spring force, scale copper and second hitching post depart from original position, and circuit is cut off, avoided circuit fire burns.At this moment, enclosure is full of non-conductive liquid potting resin solution, so can't form electric arc, avoids Thermal Cutoffs produce is destroyed or causes and can't normally disconnect, even causes the possibility of fire.
Description of drawings
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 anti-surge protection.
Fig. 4 is the mode of connection of the anti-surge protection of typical three-phase.
Fig. 5 is the standard surge voltage 1.2/50us oscillogram in the surge impact experiment of the present invention.
Fig. 6 is the standard impulse current 8/20us oscillogram in the surge impact experiment of the present invention.
Embodiment
A kind of preferred embodiment of the present invention:
With reference to figure 1, Fig. 2, a kind of type of anti-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-sensitive bar 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, described thick copper sheet 1 affixed first pin 6, described scale copper 2 affixed second pins 7, described temperature-sensitive bar 9 is connected between described thick copper sheet 1 and the scale copper 2, described thick copper sheet 1 and scale copper 2 relative sides are respectively fitted with corresponding first hitching post 4 and second hitching post 5, described temperature-sensitive bar 9 is connected between described first hitching post 4 and second hitching post 5, described spring 8 is extruded and is installed between first hitching post 4 and second hitching post 5, fill with potting resin (not sign) in described shell 10 inside, the fusing point of described potting resin is more than or equal to 50 ℃, and the fusing-off temperature scope of described temperature-sensitive bar 9 is 60-230 ℃.
Described cover plate 11 and first pin 6 and second pin, 7 contacted positions, described cover plate 11 have all watered with shell 10 seam crossings and sealed resin (not sign), and be good to guarantee its sealing.
With reference to figure 3, Fig. 4, this type of anti-surge Thermal Cutoffs TCO and piezo-resistance VSR often are connected on the passage that surge current enters, and are connected to the power input of protected equipment, surge current is arranged in circuit, the low-resistance linearisation of piezo-resistance VSR progressively aggravates, the pernicious increase of leakage current and the concentrated weak spot that flows into, and the weak spot material melts, after forming the short circuit hole about 1k Ω, surge continues to promote a bigger electric current and pours into short dot, forms high heat, and at this moment circuit just has ablaze danger; At this moment, the type of anti-surge Thermal Cutoffs TCO induced environment temperature, when temperature during greater than 50 ℃, its potting resin melts; When temperature rose to the setting operating temperature, the temperature-sensitive bar began to melt; The pulling force that can bear when temperature-sensitive bar 9 is during less than spring 8 elastic force, and under the elastic force effect of spring 8, scale copper 2 and second hitching post 5 depart from original position, and circuit is cut off, avoided circuit fire burns.At this moment, enclosure is full of non-conductive liquid potting resin solution, so can't form electric arc, avoids generation destroys or causes and can't normally disconnect to Thermal Cutoffs, even causes the possibility of fire.
Safe and reliable for confirming its performance, meet the relevant national standard of surge experiment, this type of anti-surge Thermal Cutoffs is carried out the surge impact laboratory tests of authorized by state.
Standard surge voltage 1.2/50us waveform in the surge impact experiment as shown in Figure 5, the standard impulse current 8/20us oscillogram in the surge impact experiment is as shown in Figure 6.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 anti-surge Thermal Cutoffs has certain through-current capability, can bear the impact of certain surge current; Excellent induced environment temperature is arranged again simultaneously and cut off the breaking capacity of operating current, its operation principle and working method novelty, rational in infrastructure, security performance is good.
Above-mentioned only is a specific embodiment of the present invention, and all equalizations of doing according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (5)
1. the type of anti-surge Thermal Cutoffs, comprise thick copper sheet, scale copper, locating piece, first hitching post, second hitching post, first pin, second pin, spring, the temperature-sensitive bar, 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-sensitive bar is connected between described thick copper sheet and the scale copper, the side that described thick copper sheet is relative with scale copper is respectively fitted with corresponding first hitching post and second hitching post, described spring is extruded and is installed between first hitching post and second hitching post, fills with potting resin in described enclosure.
2. a kind of type of anti-surge Thermal Cutoffs according to claim 1, it is characterized in that: described cover plate and first pin and the contacted position of second pin, cover plate and shell seam crossing have all watered and have sealed resin.
3. a kind of type of anti-surge Thermal Cutoffs according to claim 1, it is characterized in that: described thick copper sheet is fixed in described enclosure by described locating piece.
4. a kind of type of anti-surge Thermal Cutoffs according to claim 1, it is characterized in that: the fusing point of described potting resin is more than or equal to 50 ℃.
5. a kind of type of anti-surge Thermal Cutoffs according to claim 1, it is characterized in that: described temperature-sensitive bar fusing-off temperature scope is 60-230 ℃.
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 true CN103236381A (en) | 2013-08-07 |
| CN103236381B 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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Cited By (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 (6)
| 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 |
| US20100328832A1 (en) * | 2005-08-04 | 2010-12-30 | Takashi Hasunuma | Electrical Composite Element |
| 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 |
| US20120206848A1 (en) * | 2011-02-10 | 2012-08-16 | Phoenix Contact Development & Manufacturing, Inc. | Pluggable surge protection system |
-
2013
- 2013-02-25 CN CN201310058492.5A patent/CN103236381B/en active Active
Patent Citations (6)
| 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 |
| US20100328832A1 (en) * | 2005-08-04 | 2010-12-30 | Takashi Hasunuma | Electrical Composite Element |
| 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 |
| US20120206848A1 (en) * | 2011-02-10 | 2012-08-16 | Phoenix Contact Development & Manufacturing, Inc. | Pluggable surge protection system |
| 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 |
Cited By (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 |
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| Publication number | Publication date |
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| CN103236381B (en) | 2016-01-20 |
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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. |