EP2212977A1 - Overvoltage arrester having thermal overload protection - Google Patents
Overvoltage arrester having thermal overload protectionInfo
- Publication number
- EP2212977A1 EP2212977A1 EP08852515A EP08852515A EP2212977A1 EP 2212977 A1 EP2212977 A1 EP 2212977A1 EP 08852515 A EP08852515 A EP 08852515A EP 08852515 A EP08852515 A EP 08852515A EP 2212977 A1 EP2212977 A1 EP 2212977A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- surge arrester
- ventilation channel
- melting
- electrodes
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/15—Details of spark gaps for protection against excessive pressure
Definitions
- the invention relates to a Studentsnapssabieiter with thermal overload protection and its use and a method for protecting a surge arrester before thermal overload.
- An object to be solved is to provide a thermal overload protection for a surge arrester and a method that safely and easily protect the surge arrester from thermal overload.
- the surge arrester has at least two electrodes, wherein at least one of the electrodes has a
- the surge arrester may be both a two- and a three-electrode arrester, at least one of the outer electrodes being provided with a ventilation channel.
- the electrodes may be formed as opposing pin electrodes.
- an electrode may be designed as a tube electrode into which protrudes a pin electrode.
- the electrodes of the surge arrester are connected together by means of a tubular insulator, preferably a ceramic cylinder, to form a surge arrester.
- the interior of the surge arrester is gas-tight against the environment. Inside the surge arrester there is a gas.
- arcing occurs when a certain threshold voltage is exceeded.
- the arc is maintained by the feeding current as long as the electrical conditions for the arc are met.
- the arc creates thermal stress on the surge arrester which must not exceed specified values for the surge arrester and its installation environment.
- the surge arrester is thermally stressed during a load with direct or alternating voltages or with direct or alternating currents. Especially with Blitzcid. Surge currents, the surge arrester is thermally stressed.
- the fuser is configured to melt when heated.
- the ventilation channel serves to connect the interior of the surge arrester to an outside area of the surge arrester. When the melting element melts, the atmosphere of the outer region, generally air, passes via the ventilation channel into the interior of the surge arrester and extinguishes the arc. This will break the circuit.
- the ventilation channel is arranged in a pin electrode.
- the ventilation channel is arranged in an outer electrode or a tube electrode. Due to the inflow of air into the interior of the surge arrester it is prevented that a thermal overloading leads to an inadmissibly high heating of the surge arrester. By inadmissibly high
- Heating causes the danger that the surge arrester will catch fire. Overheating of the surge arrester is intentionally prevented by the air supply, since a separation from the circuit takes place when the air flows in.
- the ventilation duct is preferably closed in one embodiment at its end of the electrode facing the outer region of the overvoltage element by means of a melting element.
- the melting element has the properties of a low-melting solder.
- the fusible element has the properties of a brazing alloy.
- the melting element is formed so that upon heating of the surge arrester, the fuse element has holes through which the air passes into the interior of the surge arrester.
- the electrodes of the surge arrester have such a large distance that a flashover voltage in air is higher than the predetermined ignition voltage of the surge arrester. In the case of incoming air, no further sparking can therefore occur with the applied voltage, as a result of which the danger of inadmissibly high heating of the surge arrester can be virtually prevented.
- the Ignition voltage of the ventilated Studentsnapssabieiters thus has a significantly higher value compared to the applied voltage.
- the ventilation channel is closed with a low-melting solder.
- the solder thus forms a Lotpfropfen.
- the surge arrester is closed gas-tight in the functional normal state.
- the melting element is preferably set up in such a way that the melting element melts and releases the ventilation channel at least so far that the surge arrester is ventilated from outside by means of air supply. The melting temperature of the fusible element allows the temperature at which the surge absorber is vented to be determined and thus separated from the circuit.
- a cover disk is arranged on the outside of the melting element.
- the melting element is in this embodiment preferably between the outer end of the ventilation channel and the cover.
- the cover is preferably made of copper. However, the cover may also consist of another, preferably heat-resistant, material.
- the cover is mounted in such a way that the functional state of the surge arrester is indicated by the cover. In preferably lying arrangement of the surge arrester, it is thus possible that is indicated by the cover, whether the surge arrester is already ventilated or not. In unventilated, and thus functional state of the surge arrester, the cover is on the fuse. In case of inadmissible heating, the melting element melts, whereby the cover disc detaches from the melting element and in particular by the weight of the cover disc releases from its original position. The cover either falls completely off the electrode or at least moves away from its original position.
- a mechanical spring is arranged on the cover.
- the spring is arranged in such a way that the cover disk is released from the melting element or from the original position by the force of the spring and pressed onto a contact element located in the vicinity. Through the contact of the Cover with the contact element, an electrical contact is closed and generates an electrical signal. This electrical signal can be used for further processing, for example, to display the functional state of the surge arrester.
- the surge arrester is used in a telecommunication device, for example a telecommunication network.
- a telecommunication device for example a telecommunication network.
- Surge arrester is not limited in its use to telecommunications networks and can also be used in any other electrical circuit in which high voltages must be dissipated by means of a surge arrester.
- the surge arrester is suitable for lightning protection applications in which the surge arrester is or can be at mains voltage at least at times.
- the surge arrester is particularly suitable in the field of network protection, i. in the power supply of buildings (230 V mains), to be used against lightning surges and surges.
- a load that lasts longer in the event of a fault for example when a mains current is transmitted via a telecommunications network or a network
- the surge absorber may become excessively hot, possibly resulting in a high voltage Fire would result.
- a surge arrester as described above, this excessive heating is prevented since, when the surge arrester is vented, there is disconnection from the circuit and the surge arrester cools.
- a cover plate is released from its original position when the melting element melts.
- the cover disc thus preferably moves away from its original position on the outside of the electrode.
- the cover plate is melted during melting of the fusible element
- FIG. 1 shows an electrode of a surge arrester with a ventilation channel, which is closed with a melting element
- FIG. 2 shows an electrode of a surge absorber with a cover disc resting on the
- Melting element is located above the ventilation channel
- FIG. 3 shows a schematic sketch of a
- FIG. 4 shows a schematic sketch of an electrode of a surge arrester, in which the
- Cover is provided with a mechanical spring.
- FIG. 1 shows a cross-section of a first embodiment of an electrode 1 of a surge arrester.
- the electrode 1 preferably has a ventilation channel 2 which connects the interior of a surge arrester to the external environment.
- the ventilation channel 2 is preferably provided at its outer end with a melting element 3, which closes the surge arrester gas-tight.
- the melting element can be used as a solder plug be educated.
- the ventilation channel 2 is preferably arranged such that the end face of the electrode 1 in the interior region of the surge arrester has a homogeneous electrode end face. Between the inner faces of the electrodes 1 of a surge arrester, the formation of the spark gap.
- first bore which leads transversely through the electrode 1 and is open at both ends to the interior of the electrode 1.
- a perpendicular to the first bore arranged second bore forms together with the first bore the ventilation channel 2.
- At the outer end of the second bore of the ventilation channel 2 is sealed gas-tight with a fusible element 3.
- the ventilation duct 2 can have any shape which is suitable for connecting the environment of the surge arrester to the interior, so that air can reach the interior of the surge arrester.
- the ventilation channel preferably does not terminate in the region of the inner end face of the electrode 1.
- FIG. 2 shows a further embodiment of the electrode 1 of a surge arrester in cross section.
- the ventilation channel 2 is closed at the outer end with a melting element 3 and a cover 4 gas-tight.
- the cover 4 is fixed by the fusible element 3 in its position. In the event of an excessively high heating of the surge arrester, the melting element 3 melts, as a result of which the cover plate 4 is released from the melting element 3. In the case of horizontal installation of the surge arrester, the cover plate 4 would detach from the fusible element 3 in the event of melting of the fusible element 3 and slip or even fall off completely. The position of the cover 4 thus serves as an indicator of whether the Matternapssabieiter is ventilated or is still intact. If the surge arrester is intact, the cover 4 is in its original position on the fusible element 3. If the surge arrester is vented and thus unusable, the cover 4 is at least removed from its original position, or the cover 4 has completely cleared away from it.
- FIG. 3 shows a schematic sketch of a 2-electrode surge arrester.
- the surge arrester has two electrodes 1, of which at least one of the two electrodes 1 has a ventilation channel 2.
- the ventilation channel is sealed gas-tight with a fusible element 3.
- a tubular cylinder 5 is arranged as an insulator, which together with the two electrodes 1 forms the actual surge arrester.
- the cylinder 5 is preferably formed of a ceramic material. Together with the two electrodes 1, the cylinder 5 forms a gas-tight closed interior of the surge arrester.
- the distance between the two electrodes 1 of the surge arrester is so large that a flashover voltage between the two electrodes 1 in air is higher than the predetermined ignition voltage of the surge arrester.
- FIG. 4 shows an electrode 1 of a further embodiment of the surge arrester in cross section.
- the ventilation duct 2 of the electrode 1 is provided with a Fused 3 gas-tight.
- a cover 4 is arranged on the fusible element 3, that between the electrode 1 and the cover 4, a spring 6 is arranged.
- the cover 4 is fixed by the fusible element 3.
- the melting element 3 melts.
- the cover 4 is released from the fusible element 3 and is pressed by the spring 6 on a contact element 7, which is arranged on the end face of the surge arrester.
- a signal is triggered by the contact element, which is forwarded via a signal line 8 to an evaluation device, which is not shown in this figure.
- the signal of the contact element 7 is thus suitable, the
- Melting element is closed, wherein the center electrode has direct contact to the outside. Furthermore, it is also possible to choose the shape and shape of the ventilation duct otherwise than shown.
- the surge arrester is not limited to the number of schematically illustrated elements. The description of the objects and methods disclosed herein is not limited to the individual specific embodiments. Rather, the features of the individual embodiments, as far as technically feasible, can be combined as desired.
Landscapes
- Fuses (AREA)
- Thermistors And Varistors (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007056183.2A DE102007056183B4 (en) | 2007-11-21 | 2007-11-21 | Surge arrester with thermal overload protection, use of a surge arrester and method for protecting a surge arrester |
PCT/EP2008/065233 WO2009065750A1 (en) | 2007-11-21 | 2008-11-10 | Overvoltage arrester having thermal overload protection |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2212977A1 true EP2212977A1 (en) | 2010-08-04 |
EP2212977B1 EP2212977B1 (en) | 2011-06-22 |
Family
ID=40297937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08852515A Not-in-force EP2212977B1 (en) | 2007-11-21 | 2008-11-10 | Overvoltage arrester having thermal overload protection |
Country Status (8)
Country | Link |
---|---|
US (1) | US8395876B2 (en) |
EP (1) | EP2212977B1 (en) |
JP (1) | JP2011504281A (en) |
KR (1) | KR20100094531A (en) |
CN (1) | CN101868889B (en) |
AT (1) | ATE514211T1 (en) |
DE (1) | DE102007056183B4 (en) |
WO (1) | WO2009065750A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105374653A (en) | 2015-12-04 | 2016-03-02 | 深圳市槟城电子有限公司 | Gas discharge tube |
CN105610049B (en) * | 2016-02-25 | 2024-05-17 | 深圳市槟城电子股份有限公司 | Gas discharge tube |
CN105680435A (en) * | 2016-03-23 | 2016-06-15 | 深圳市槟城电子有限公司 | Surge protection device and gas discharge tube therefor |
CN106329316B (en) * | 2016-11-07 | 2018-03-02 | 深圳市瑞隆源电子有限公司 | A kind of open loop failure mode discharge tube |
CN109755932A (en) * | 2017-11-06 | 2019-05-14 | 东莞市阿甘半导体有限公司 | A kind of AC power source surge protective device and electronic equipment |
CN117081023B (en) * | 2023-08-21 | 2024-02-06 | 济南雷盾电子技术有限公司 | Maintenance-free charging pile power lightning protection device |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1389142A (en) * | 1973-05-31 | 1975-04-03 | Comtelco Uk Ltd | Electrical surge arrestor |
US4015228A (en) * | 1974-06-10 | 1977-03-29 | Matsushita Electric Industrial Co., Ltd. | Surge absorber |
GB1564224A (en) | 1976-07-02 | 1980-04-02 | M O Valve Co Ltd | Excess voltage arresters |
US4212047A (en) * | 1976-08-31 | 1980-07-08 | Tii Corporation | Fail-safe/surge arrester systems |
US4150414A (en) * | 1977-11-14 | 1979-04-17 | Tii Corporation | Air gap short circuiting device for gas tube arrester |
US4755824A (en) * | 1983-12-23 | 1988-07-05 | Eyring Research Institute, Inc. | Hardened coupling device and method |
JPH01163923A (en) * | 1987-12-19 | 1989-06-28 | Ngk Insulators Ltd | Lightening insulator |
DE3835921C2 (en) * | 1988-10-18 | 1996-10-02 | Siemens Ag | Surge arrester with air gap |
DD279120A1 (en) * | 1988-12-28 | 1990-05-23 | Energieversorgung Ingbetrieb | PRESSURE RELIEF DEVICE FOR OVERVOLTAGE ARRESTER IN MEDIUM VOLTAGE SYSTEMS |
DE4118738C1 (en) * | 1991-06-05 | 1992-12-24 | Krone Ag, 1000 Berlin, De | |
DE19845889B4 (en) * | 1998-10-06 | 2007-03-01 | Dehn + Söhne GmbH + Co KG | The spark gap arrangement |
US6930871B2 (en) * | 1999-11-19 | 2005-08-16 | Citel | Lightning arrester device for low-voltage network |
DE10059534C1 (en) | 2000-11-30 | 2002-06-27 | Epcos Ag | Electrical component, arrangement of the component and method for producing the arrangement |
DE10134752B4 (en) * | 2001-07-17 | 2005-01-27 | Epcos Ag | Surge arresters |
DE10162916A1 (en) * | 2001-12-20 | 2003-07-10 | Epcos Ag | Spring clip, surge arrester with the spring clip and arrangement of a surge arrester |
DE102004006988B4 (en) * | 2003-11-28 | 2014-02-06 | Dehn + Söhne Gmbh + Co. Kg | Spark-gap overvoltage protection device comprising at least two main electrodes located in a pressure-tight housing |
DE102004025912A1 (en) * | 2004-05-27 | 2005-12-22 | Epcos Ag | Surge arresters |
DE102008022794A1 (en) * | 2008-01-31 | 2009-08-06 | Epcos Ag | Electrical protection component with short-circuit device |
-
2007
- 2007-11-21 DE DE102007056183.2A patent/DE102007056183B4/en active Active
-
2008
- 2008-11-10 CN CN200880118100.7A patent/CN101868889B/en not_active Expired - Fee Related
- 2008-11-10 EP EP08852515A patent/EP2212977B1/en not_active Not-in-force
- 2008-11-10 JP JP2010534442A patent/JP2011504281A/en not_active Withdrawn
- 2008-11-10 KR KR1020107013736A patent/KR20100094531A/en not_active Application Discontinuation
- 2008-11-10 AT AT08852515T patent/ATE514211T1/en active
- 2008-11-10 WO PCT/EP2008/065233 patent/WO2009065750A1/en active Application Filing
-
2010
- 2010-05-17 US US12/781,224 patent/US8395876B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2009065750A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2212977B1 (en) | 2011-06-22 |
KR20100094531A (en) | 2010-08-26 |
DE102007056183A1 (en) | 2009-06-04 |
DE102007056183B4 (en) | 2020-01-30 |
ATE514211T1 (en) | 2011-07-15 |
CN101868889B (en) | 2014-06-04 |
US20100265627A1 (en) | 2010-10-21 |
JP2011504281A (en) | 2011-02-03 |
WO2009065750A1 (en) | 2009-05-28 |
CN101868889A (en) | 2010-10-20 |
US8395876B2 (en) | 2013-03-12 |
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