CN101083165B - Lightning arrester with thermal excitation dropper - Google Patents
Lightning arrester with thermal excitation dropper Download PDFInfo
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- CN101083165B CN101083165B CN2007100153191A CN200710015319A CN101083165B CN 101083165 B CN101083165 B CN 101083165B CN 2007100153191 A CN2007100153191 A CN 2007100153191A CN 200710015319 A CN200710015319 A CN 200710015319A CN 101083165 B CN101083165 B CN 101083165B
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- thermal excitation
- lightning arrester
- heating wire
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- thermal
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Abstract
The invention relates to a lightning conductor which carries the thermal excitation type abscission implement, belongs to the arrester and its abscission implement domain. It is composed of the arrester, the thermal exciter and abscission implement. The inferior extremity of the arrester connects with the superior extremity of the thermal exciter; the inferior extremity of thermal exciter connects with the superior extremity of the abscission implement. The arrester connects with the out-circled electric heating wire of normally open contact and the bimetallic strip in the thermal exciter; the normally open contact connects with the abscission implement, the inferior extremity of the abscission implement and the inferior extremity of the electric heating wire both connect with the earth line. The thermal exciter is composed of outer covering, superior connecting fitting, inferior connecting fitting, earth line connection bullion, strip conductor, the normally open contact, bimetallic strip and out-circled electric heating wire. The normally open contact, bimetallic strip and out-circled electric heating wire all install in the thermal excitation crustaceous atrium. When the electrical network has happened the thunder stroke voltage, the thunder current through the electric heating wire joins to the ground, no longer induces the abscission implement detonation. Once the arrester had short circuit damaged, the short-circuit current caused the heating wire to detonate the abscission implement, prevented the electrical network high pressure earth accident.
Description
(1) technical field
The present invention relates to lightning arrester and dropping device thereof, also relate to piezo-resistance and thermal relay, particularly is a kind of lightning arrester that has the thermal excitation dropper device.
(2) background technology
The lightning arrester that 6～10KV transmission line is at present commonly used is based on that the principle design of piezo-resistance forms.Its upper end is electrically connected with the three-phase high-voltage of dihedral connection, and its lower end is connected with ground wire.At no thunder and lightning weather, the piezo-resistance resistance of lightning arrester is very big, is open-circuit condition; If moment thunderbolt voltage takes place on the thunderstorm weather electrical network, the piezo-resistance resistance of lightning arrester is zero, moment thunder-strike current go into ground at a terrific speed, thereby protect grid equipment to exempt from thunderbolt.If yet lightning arrester is bad, does not only have the lightning protection effect, also high voltage short circuit earth fault might take place.In order to address this problem, people's device that comes off of a thermal-explosion type in the series connection below lightning arrester, in case the lightning arrester short circuit damages, short circuit current will make the device that comes off form open circuit at instantaneous explosion, prevents that the high-voltage earthing accident from taking place.But, cause new problem therefrom, when thunderbolt voltage takes place, equally also can ignite the device that comes off, will frequently change the device that comes off.Patent documentation by retrieval, wherein three pieces of Chinese patent patent No.s are CN01228711.3, CN96206715.6, CN94243689.X can be used as weak relevant documents of the present invention, but its architectural feature and operation principle has significant difference.
(3) summary of the invention
Purpose of the present invention just is to innovate development, a kind of unusual lightning arrester that has the thermal excitation dropper device is provided.Have only when the lightning arrester short circuit damages, the heat that short circuit current produces can be ignited the device that comes off indirectly, prevents that electrical network high-voltage earthing accident from taking place; When thunderbolt voltage takes place when, moment thunder-strike current go into ground through bypass, the device that no longer causes coming off explodes and comes off, still can operate as normal.Can normally take shelter from the thunder, save a large amount of manpower and materials again.
Above-mentioned purpose is realized by following technical proposals:
The lightning arrester that has the thermal excitation dropper device comprises lightning arrester, thermal excitation device and device three parts that come off, and it is characterized in that three parts all have a style of one's own, and independently shell is respectively arranged, and electric component places within the shell.Three's mutual position concerns that the lower end of lightning arrester is connected with the upper end of thermal excitation device, and the lower end of thermal excitation device is connected with the upper end of the device that comes off.Three's electrical connection is, the lower end of lightning arrester is connected around heating wire with normally opened contact, the outer of bimetal leaf in the thermal excitation device, and normally opened contact is connected with the upper end of the device that comes off again, and the lower end of the device that comes off and the lower end of heating wire all are connected with ground wire.The thermal excitation device is made up of around heating wire outside reaching shell, upper connector, following connector, ground wire connection metal derby, strip conductor, normally opened contact, bimetal leaf.Upper connector is contained in the top of shell, and following connector is contained in the bottom of shell, and ground wire connects metal derby and is contained on the shell, normally opened contact, bimetal leaf and the outer inner chamber that all is contained in shell around heating wire.
Upper connector and following connector in the above-mentioned lightning arrester that has a thermal excitation dropper device all adopt engage thread and shell to assemble the epoxy resin sealing of its outer end.
Ground wire in the above-mentioned lightning arrester that has a thermal excitation dropper device connects the side that metal derby is embedded in shell, and fixes with binding agent.The upper end of strip conductor is connected metal derby and connects with ground wire, the lower end is connected with the ground wire screw rod of the device bottom that comes off, and the property-line nut is fixed.
Normally opened contact in the above-mentioned lightning arrester that has a thermal excitation dropper device is similar to the normally opened contact in the thermal relay, controlled by bimetal leaf, and it is then closed to be heated.
Heating wire resistance value in the above-mentioned lightning arrester that has a thermal excitation dropper device is 2 Ω ± 5%, and its upper end is connected with upper connector, and its lower end is connected the metal derby connection with ground wire.
The lightning arrester that has the thermal excitation dropper device that manufactures according to technique scheme, owing to increased the thermal excitation device, heating wire wherein plays shunting action, so when thunderbolt voltage takes place electrical network, moment, lightning current was through heating wire and no longer through coming off device, the device that no longer causes coming off blast.In case the lightning arrester short circuit damages, short circuit current is gone into ground through heating wire, electrothermal wire heating and bi-metal plate deformed promotes the closed conduction of normally opened contact, the device that causes coming off blast and ground wire disconnection.Both had normal lightning protection function, and overcome above-mentioned tradition again and come off device whenever the shortcoming that has thunderbolt voltage to demolish.It is simple in structure, and cost is low, and the structure that need not change the former lightning arrester and the device that comes off gets final product supporting installing and using, and has better economic benefit and social benefit.
(4) description of drawings
Accompanying drawing 1 is an overall structure partial schematic sectional view of the present invention.
Accompanying drawing 2 is circuit diagrams of the present invention.
(5) embodiment
Embodiment of accompanying drawings:
Among Fig. 1, the 1st, lightning arrester, the 2nd, the following connector of lightning arrester, the 3rd, the upper connector of thermal excitation device, the 4th, normally opened contact, the 5th, the shell of thermal excitation device, the 6th, the following connector of thermal excitation device, the 7th, the upper connector of the device that comes off, the 8th, the device that comes off, the 9th, ground wire nut, the 10th, the device grounding screw rod comes off, the 11st, bimetal leaf and outer around heating wire, the 12nd, ground wire connects metal derby, the 13rd, strip conductor.
By shown in Figure 1, have the lightning arrester of thermal excitation dropper device, draw together lightning arrester 1, thermal excitation device 5 and device 8 three parts that come off, it is characterized in that three parts all have a style of one's own, independently shell is respectively arranged, electric component places within the shell.The lower end of lightning arrester 1 is connected with the upper end of thermal excitation device 5, and the lower end of thermal excitation device 5 is connected with the upper end of the device 8 that comes off.
By shown in Figure 2, its electrical connection is, the normally opened contact 4 in the lower end of lightning arrester 1 and the thermal excitation device, bimetal leaf and be connected outward around heating wire 11, and normally opened contact 4 is connected with the upper end of the device 8 that comes off again.The come off lower end of device 8 and the lower end of heating wire 11 all is connected with ground wire.
By shown in Figure 1, the thermal excitation device is made up of around heating wire 11 outside reaching shell 5, upper connector 3, following connector 6, ground wire connection metal derby 12, strip conductor 13, normally opened contact 4, bimetal leaf.Upper connector 3 is contained in the top of shell 5, and following connector 6 is contained in the bottom of shell 5, and ground wire connects metal derby 12 and is contained on the shell 5, normally opened contact 4, bimetal leaf and the outer inner chamber that is contained in shell 5 around heating wire 11.Strip conductor 13 upper ends are connected metal derby 12 and connect with ground wire, the lower end is connected with the ground wire screw rod 10 of device 8 bottoms that come off, and property-line nut 9 is fixing.
Operation principle of the present invention is: as shown in Figure 2, the upper end of lightning arrester 1 is connected with a certain of 6～10KV electrical network, and the grounding screw rod 10 and heating wire 11 lower ends of device 8 lower ends that come off all are connected with ground wire.When thunderbolt voltage took place, the lightning arrester made from piezo-resistance 1 was by high impedance vanishing impedance, and instantaneous thunder-strike current is gone into ground through the heating wire 11 of 2 Ω, has both reached lightning-arrest purpose, and the feasible again device 8 that comes off is safe and sound.In case lightning arrester 1 short circuit damages, short circuit current also goes into ground through 2 Ω heating wire 11.The about 5A of this electric current makes heating wire 11 quick heating ups, and the bimetal leaf temperature distortion promotes normally opened contact 4 closed conductions, and the electric cap blast in the device 8 that causes coming off disconnects ground wire, prevents because of lightning arrester 1 short circuit initiation electrical network high-voltage earthing accident.
Claims (5)
1. lightning arrester that has the thermal excitation dropper device, comprise lightning arrester (1), thermal excitation device (5) and device (8) three parts that come off, it is characterized in that three parts all have a style of one's own, independently shell is respectively arranged, electric component places within the shell, the lower end of lightning arrester (1) is connected with the upper end of thermal excitation device (5), and the lower end of thermal excitation device (5) is connected with the upper end of the device that comes off (8); Its electrical connection is, the lower end of lightning arrester (1) is connected around heating wire (11) with normally opened contact (4), the outer of bimetal leaf in the thermal excitation device, normally opened contact (4) is connected with the upper end of the device that comes off (8) again, and the lower end of the lower end of the device that comes off (8) and heating wire (11) all is connected with ground wire; The thermal excitation device is made up of around heating wire (11) outside reaching shell (5), upper connector (3), following connector (6), ground wire connection metal derby (12), strip conductor (13), normally opened contact (4), bimetal leaf, upper connector (3) is contained in the top of shell (5), following connector (6) is contained in the bottom of shell (5), ground wire connects metal derby (12) and is contained on the shell (5), normally opened contact (4), bimetal leaf and the outer inner chamber that all is contained in shell (5) around heating wire (11).
2. the lightning arrester that has the thermal excitation dropper device according to claim 1 is characterized in that upper connector (3) and following connector (6) in the thermal excitation device, all adopts engage thread and shell (5) assembling, the epoxy resin sealing of its outer end.
3. the lightning arrester that has the thermal excitation dropper device according to claim 1, it is characterized in that the ground wire in the thermal excitation device connects the side that metal derby (12) is embedded in shell (5), and fix with binding agent, the upper end of strip conductor (13) is connected metal derby (12) and connects with ground wire, the lower end is connected with the ground wire screw rod (10) of the device that comes off (8) bottom, and property-line nut (9) is fixing.
4. the lightning arrester that has the thermal excitation dropper device according to claim 1 is characterized in that normally opened contact (4) in the thermal excitation device is similar to the normally opened contact in the thermal relay, controlled by bimetal leaf, and it is then closed to be heated.
5. the lightning arrester that has the thermal excitation dropper device according to claim 1 is characterized in that heating wire (11) resistance value in the thermal excitation device is 2 Ω ± 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100153191A CN101083165B (en) | 2007-06-26 | 2007-06-26 | Lightning arrester with thermal excitation dropper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100153191A CN101083165B (en) | 2007-06-26 | 2007-06-26 | Lightning arrester with thermal excitation dropper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101083165A CN101083165A (en) | 2007-12-05 |
| CN101083165B true CN101083165B (en) | 2010-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100153191A Expired - Fee Related CN101083165B (en) | 2007-06-26 | 2007-06-26 | Lightning arrester with thermal excitation dropper |
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| CN (1) | CN101083165B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107316724B (en) * | 2017-06-14 | 2018-10-12 | 温州益坤电气有限公司 | Alternating current-direct current voltage limiter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6795290B2 (en) * | 2001-07-17 | 2004-09-21 | Epcos Ag | Surge arrestor |
| CN2755769Y (en) * | 2004-12-25 | 2006-02-01 | 中国石化集团胜利石油管理局电力管理总公司 | Vacuum arc chuted D.C. contactor |
| CN2896300Y (en) * | 2006-05-11 | 2007-05-02 | 中国石化集团胜利石油管理局电力管理总公司 | Passive thunder-and-lightning counter tester |
| CN2909504Y (en) * | 2006-05-27 | 2007-06-06 | 中国石化集团胜利石油管理局电力管理总公司 | Simple high-tension circuit breaker analog device |
| CN201051613Y (en) * | 2007-06-26 | 2008-04-23 | 中国石化集团胜利石油管理局电力管理总公司 | Heat activated arrester falling device |
-
2007
- 2007-06-26 CN CN2007100153191A patent/CN101083165B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6795290B2 (en) * | 2001-07-17 | 2004-09-21 | Epcos Ag | Surge arrestor |
| CN2755769Y (en) * | 2004-12-25 | 2006-02-01 | 中国石化集团胜利石油管理局电力管理总公司 | Vacuum arc chuted D.C. contactor |
| CN2896300Y (en) * | 2006-05-11 | 2007-05-02 | 中国石化集团胜利石油管理局电力管理总公司 | Passive thunder-and-lightning counter tester |
| CN2909504Y (en) * | 2006-05-27 | 2007-06-06 | 中国石化集团胜利石油管理局电力管理总公司 | Simple high-tension circuit breaker analog device |
| CN201051613Y (en) * | 2007-06-26 | 2008-04-23 | 中国石化集团胜利石油管理局电力管理总公司 | Heat activated arrester falling device |
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| Publication number | Publication date |
|---|---|
| CN101083165A (en) | 2007-12-05 |
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Granted publication date: 20100804 Termination date: 20110626 |