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EP2267850B1 - Elément de protection contre les surtensions - Google Patents

Elément de protection contre les surtensions Download PDF

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Publication number
EP2267850B1
EP2267850B1 EP10006445.0A EP10006445A EP2267850B1 EP 2267850 B1 EP2267850 B1 EP 2267850B1 EP 10006445 A EP10006445 A EP 10006445A EP 2267850 B1 EP2267850 B1 EP 2267850B1
Authority
EP
European Patent Office
Prior art keywords
overvoltage
limiting component
overvoltage protection
protection element
housing
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.)
Not-in-force
Application number
EP10006445.0A
Other languages
German (de)
English (en)
Other versions
EP2267850A2 (fr
EP2267850A3 (fr
Inventor
Christina Stohlmeyer
Andreas Metzger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Phoenix Contact GmbH and Co KG
Original Assignee
Phoenix Contact GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Phoenix Contact GmbH and Co KG filed Critical Phoenix Contact GmbH and Co KG
Publication of EP2267850A2 publication Critical patent/EP2267850A2/fr
Publication of EP2267850A3 publication Critical patent/EP2267850A3/fr
Application granted granted Critical
Publication of EP2267850B1 publication Critical patent/EP2267850B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01T1/12—Means structurally associated with spark gap for recording operation thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
    • 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
    • H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure

Definitions

  • the invention relates to an overvoltage protection element having a housing, with at least one overvoltage limiting component arranged in the housing, in particular a varistor, and with two connection elements for electrically connecting the overvoltage protection element to the current or signal path to be protected, with at least one spring element and with a thermally disconnecting element Connection which disconnects when the temperature of the overvoltage limiting component exceeds a predetermined limit temperature, wherein in the normal state of the overvoltage protection element, the connection elements are in each case in electrically conductive contact with one pole of the overvoltage limiting component.
  • an overvoltage protection element which has a thermal separation device for monitoring the state of a varistor.
  • the first connection element is connected via a flexible conductor to a rigid separation element whose end remote from the flexible conductor is connected via a solder joint to a connection lug provided on the varistor.
  • the other connection element is connected via a flexible conductor fixed to the varistor or a terminal lug on the varistor.
  • the separator is urged by a spring system with a force that causes the separator to move linearly upon separation of the solder joint from the terminal lug so that the varistor is electrically disconnected under thermal overload.
  • a remote signaling contact is simultaneously actuated during the separation of the solder connection, so that a remote monitoring of the state of the overvoltage protection element is possible.
  • an overvoltage protection element in which the monitoring of the state of a varistor according to the principle of a temperature switch, so that when overheating of the varistor a provided between the varistor and a separator solder joint is separated, resulting in an electrical separation of the varistor.
  • the DE 695 03 743 T2 discloses an overvoltage protection element with two varistors, which has two separating means, which can individually separate the varistors at their end of life.
  • the separating means each have a resilient separating tongue, wherein the first end of the separating tongue firmly connected to the first terminal and the second end of the separating tongue is attached in the normal state of the overvoltage protection element via a solder joint to a connecting tongue on the varistor. If there is an inadmissible heating of the varistor, this leads to a melting of the solder joint.
  • the separation tongue Since the separation tongue is deflected in the soldered state (normal state of the overvoltage protection element) from its rest position and thus biased, the free end of the separation tongue springs when softening the solder joint of the connecting tongue of the varistor, whereby the varistor is electrically disconnected.
  • the separation tongue In order to ensure the required insulation and tracking resistance and to erase an emerging when opening the separation point arc, it is necessary that when pivoting the separation tongue as large a distance between the second end of the separation tongue and the connection tongue of the overvoltage limiting component is achieved.
  • the US 2007/0217111 A1 discloses an overvoltage protection element having a solder joint having a thermally isolating connection, which serves in the normal state of the overvoltage protection element of the electrical connection between a connection element and a pole of the varistor.
  • the solder joint is arranged between one end of a resilient separating element and a contact portion of the varistor, so that the solder joint is always loaded by the spring force of the deflected from its rest position separating element with a shear stress.
  • the overvoltage protection element known from this publication it is also necessary in the case of the overvoltage protection element known from this publication to erase the arc arising when the separation point is opened, so that the greatest possible distance between the end of the separation element and the contact section of the varistor is achieved during springback of the separation element.
  • the known overvoltage protection elements are generally designed as a "protective plug", which together with a device lower part form an overvoltage protection device.
  • a surge protection device which is intended to protect, for example, the phase-leading conductors L1, L2, L3 and the neutral conductor N and possibly also the earth conductor PE, corresponding terminals for the individual conductors are provided in the known surge protection devices on the device base.
  • the connection elements are designed as plug pins in the overvoltage protection element, which are arranged in the lower device part corresponding, connected to the terminals sockets, so that the overvoltage protection element can be easily plugged onto the device base.
  • overvoltage protection devices In such overvoltage protection devices, the installation and assembly by plugging the surge protection elements is very simple and time-saving feasible.
  • overvoltage protection devices partly still have a changeover contact as a signal transmitter for remote signaling of the status of at least one overvoltage protection element and an optical status indication in the individual overvoltage protection elements.
  • the status display indicates whether the overvoltage-limiting component arranged in the overvoltage protection element is still functional or not.
  • varistors are used as overvoltage limiting component, although it is also possible to use gas-filled surge arresters, spark gaps or diodes depending on the intended use of the overvoltage protection element.
  • thermal separation devices which are based on the melting of a solder joint, have to fulfill several tasks.
  • a secure and good electrical connection between the first connection element and the overvoltage limiting component must be ensured.
  • the separation point must ensure a safe separation of the overvoltage limiting component as well as a permanent insulation resistance and tracking resistance.
  • the problem is, however, that the solder joint is permanently loaded with a shear stress due to the spring force of the spring element or deflected from its rest position separating tongue in the normal state of the overvoltage protection element.
  • the present invention is therefore based on the object to provide an initially described overvoltage protection element, in which the aforementioned disadvantages are avoided. It should be ensured both a safe and good electrical connection in the normal state and a safe separation of a defective overvoltage limiting device. In addition, the highest possible insulation and tracking resistance should be achieved even with the smallest possible size of the overvoltage protection element.
  • overvoltage protection element characterized in that the overvoltage limiting component is rotatably mounted in the housing, wherein in the normal state of the overvoltage protection element at least one pole of the overvoltage limiting component is connected via a plug connection with a connection element.
  • at least one spring element is arranged between the housing and the overvoltage limiting component in such a way that the overvoltage limiting component is rotated by the spring element during thermal overload so that at least one pole is no longer in electrically conductive contact with the associated connection element.
  • the two poles of overvoltage limiting component are in the normal state of the overvoltage protection element against the spring force of the spring element in electrically conductive contact with the connection elements, a thermally disconnecting connection is arranged between the overvoltage limiting component and the housing.
  • the overvoltage protection element prevents this connection between the overvoltage limiting component and the housing rotation of the overvoltage limiting component, so that the connection elements are in each case in electrically conductive contact with one pole of the overvoltage limiting component.
  • the solder joint which serves in the normal state of the overvoltage protection element of the electrical connection between the first connection element and a pole of the overvoltage limiting component, is always loaded by the spring force of a spring element with a shear stress, resulting in a deterioration of can lead electrical connection is the connection in the overvoltage protection element according to the invention not loaded by a spring force between the connection elements and the poles of the overvoltage limiting component.
  • the fixation of the overvoltage limiting component in the contact position takes place in the overvoltage protection element according to the invention by the thermally disconnecting compound which is formed between the tibernapssbegrenzenden device and the housing.
  • the spring force of the spring element thus does not interfere in the normal state of the overvoltage protection element at the electrical connection points of the overvoltage limiting component but at the separately formed connection between the component and the housing.
  • a spring element can be used both a compression spring and a tension spring.
  • a compression spring and a tension spring can be used.
  • the thermally disconnecting connection between the overvoltage limiting component and the housing is realized by a retaining element arranged in the housing, which prevents rotation of the overvoltage limiting component in the normal state of the overvoltage protection element.
  • the retaining element is made of a material which melts when the temperature of the overvoltage limiting component exceeds a predetermined limit temperature.
  • the arrangement of the retaining element in direct contact with or in the immediate vicinity of the overvoltage limiting component is thereby ensured that a heating of the overvoltage limiting component also leads to a heating of the retaining element, so that the retaining element melts upon reaching the predetermined limit temperature.
  • This then causes the rotatably mounted overvoltage limiting component is rotated by the spring element, whereby the realized between at least one pole and a connection element plug connection is disconnected, causing an electrical separation of the overvoltage limiting component.
  • a suitably suitable plastic which melts from a temperature of about 110 ° C to 130 ° C.
  • polyethylene preferably low Density Polyethylene (LDPE) or High Density Polyethylene (HDPE) as well as Polycarbonate (PC).
  • LDPE low Density Polyethylene
  • HDPE High Density Polyethylene
  • PC Polycarbonate
  • other materials in particular other plastics, conceivable for the realization of the retaining element.
  • a plurality of retaining elements, in particular two retaining elements may be arranged between the housing and the surge-limiting component.
  • the second pole is also connected via a plug connection to the second connection element, wherein both poles are electrically conductively connected in each case to a connection lug.
  • the connecting lugs are preferably designed as plug pins, which are inserted in the normal state of the overvoltage protection element in the form of a plug, in particular as a tulip-shaped contact forks, connecting elements. It is particularly easy to produce a shock current carrying electrical connection between the terminal lugs and the connection elements.
  • a plug connection is formed only between one pole of the overvoltage limiting component and a connection element, wherein this pole is also electrically connected to a terminal lug.
  • the terminal tab is preferably formed as a pin, in which case the connection element is formed on the side facing the terminal lug as a female connector.
  • the second pole of the overvoltage limiting component is not electrically connected in this embodiment via a plug connection but via a rotary connection with the second connection element.
  • the second pole of the overvoltage limiting component is connected to a pivot pin and the associated second connection element on the pivot side facing the side with a corresponding pivot bearing.
  • the formation of a rotary connection between the second pole of the overvoltage limiting component and the second connection element makes it possible for thermal overloading of the overvoltage limiting component to be rotated by the spring element.
  • only one pole is separated from the connection element, while the other pole is still connected to the connection element via the rotary connection.
  • the overvoltage protection element In order to ensure a high insulation and creeping current resistance and a at the opening of the separation point, i. When disconnecting the connector between the at least one pole and the at least one connection element to extinguish arcing, the greatest possible distance between the pole or the poles and the associated connection element must be achieved. For this purpose, however, it is not necessary in the overvoltage protection element according to the invention that its dimensions are increased, since the desired spacing can be achieved by a correspondingly wide rotation of the overvoltage-limiting component.
  • the overvoltage protection element according to the invention is advantageously designed as a "protective plug" so that it forms an overvoltage protection device together with a corresponding device lower part.
  • the lower device part has a telecommunications contact for remote notification of the state of the overvoltage protection element.
  • a release pin is provided which protrudes through an opening in the bottom of the housing. The release pin may be connected to the overvoltage limiting component such that it is displaced when disconnecting the electrical contact between at least one pole of the overvoltage limiting component and a connection element with the overvoltage limiting component, whereby the arranged in the device lower part telecommunications contact is actuated.
  • the figures show an overvoltage protection element 1 with a housing 2, wherein a surge-limiting component 3 is arranged in the housing 2.
  • the overvoltage limiting device is a varistor 3;
  • a gas-filled Gönapsabieiter as surge limiting Component 3 can be used.
  • Trained as a protective plug overvoltage protection element 1 has two connecting elements 4, 5 designed as sockets, which can be plugged onto corresponding connector pins of a device lower part, not shown here.
  • the two poles of the varistor 3 are each connected to a connecting lug 6, 7, wherein in the normal state of the overvoltage protection element 1, the varistor 3 is connected via the two connecting lugs 6, 7 with the two connecting elements 4, 5.
  • the connection between the two terminal lugs 6, 7 and the two connecting elements 4.5 follows in each case via a shock current carrying plug-in connection 8, 9, including the ends of the connecting elements 4, 5 which are designed as plug pins 6, 7 as tulip-shaped contact sockets 10, 11 are formed.
  • a spring element 12 and a retaining element 13 are still arranged in the housing 2.
  • the spring element 12 is in this case arranged between the housing 2 and the varistor 3 or the connecting lug 6 of the varistor 3, that the varistor 3 is rotated by the spring element 12 in case of thermal overload, that the two connecting lugs 6, 7 from the contact bushings 10th 11, so that the two poles of the varistor 3 are no longer in electrically conductive contact with the associated connection elements 4, 5; the varistor 3 is electrically isolated.
  • the retaining element 13 prevents that the varistor 3 is already rotated in the normal state of the overvoltage protection element 1 due to the spring force of the spring element 12. By the retaining element 13 thus rotation of the varistor 3 is prevented, as long as the varistor 3 has not exceeded a certain limit temperature. Due to the arrangement of the retaining element 13 with direct contact with the varistor 3, a heating of the varistor 3 also leads to a heating of the preferably made of plastic retaining element 13.
  • the retaining element 13 is designed so that it reaches the limit temperature, usually between about 110 ° C and 130 ° C, melts, so that the Varistor 3 is no longer held by the retaining element 13 in its position but due to the spring force of the spring element 12 is rotated.
  • the overvoltage protection element 1 once in the normal state ( Fig. 2 ) and once with electrically separated varistor 3 ( Fig. 3 ), the varistor 3 is rotated by the spring element 12 in the clockwise direction in the illustrated exemplary embodiments in such a way that the two connection lugs 6, 7 are pulled out of the contact bushes 10, 11.
  • the separated state of the varistor 3 in which the tension spring 12 is relaxed, the distance between the terminal lugs 6, 7 and the associated contact sockets 10, 11 is so large that an eventual disconnection of the connector 8, 9 evtl, resulting arc is interrupted.
  • the two terminal lugs 6, 7 are both arranged on the outer periphery 14 of the varistor 3, whereby its production, in particular the Enveloping process of the varistor 3 with an insulating sheath simplified.
  • a very flat construction of the varistor 3 and thus of the overvoltage protection element 1 is achievable overall.
  • a plurality of bearing rollers 18 are arranged in the housing 2 such that the varistor 3 are rotated by the spring element 12 with low frictional resistance can, when the retaining element 13 is melted and thus no longer counteracts the spring force of the spring element 12.
  • an optical state indicator 19 is provided, which is applied as a paint or colored film directly on the outer circumference 14 of the varistor 3.
  • a viewing window 21 is formed, through which, depending on the rotational position of the varistor 3, a different colored portion of the status display 19 is visible.
  • the housing 2 is formed in two parts, namely a cup-shaped, cup-shaped first housing part 22 and a lid formed as a second housing part 23 has.
  • the varistor 3 the connecting elements 4, 5, the spring element 12, the retaining element 13 and the bearing rollers 18 are arranged, while the second housing part 23 serves only to close the housing 2.
  • the assembly of the overvoltage protection element according to the invention can be done simply by first the bearing rollers 18 and the varistor 3 and the connection elements 4, 5 are inserted into the first housing part 22, the spring element 12 is initially only with its one end to the terminal lug 6 of the varistor Thereafter, the varistor 3 is rotated in the housing 2 such that the terminal lug 6 - in the embodiment according to 4 and 5 - or the two terminal lugs 6, 7 - in the Aus colburungsbeispiel according to the FIGS. 2 and 3 - Between the female contact 10 and the female contacts 10 and 11 are inserted. Subsequently, the retaining element 13 is inserted into a receptacle 24 provided for this purpose in the housing part 22, whereby the varistor 3 is locked in its position. Thereafter, the spring element 12 is stretched and mounted on a likewise formed in the housing part 22 fastening pin 25 with its second end. Finally, the lid 23 is connected to the housing part 22, whereby the housing 2 is closed.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuses (AREA)
  • Thermistors And Varistors (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Claims (12)

  1. Elément de protection contre les surtensions comportant un boîtier (2), comportant au moins un composant limiteur de surtension (3) disposé dans le boîtier (2), notamment une varistance, comportant deux éléments de connexion (4, 5) destinés à connecter électriquement l'élément de protection contre les surtensions (1) au trajet de courant ou de signal à protéger, comportant au moins un élément à ressort (12) et comportant une liaison interruptible thermiquement qui est interrompue lorsque la température du composant limiteur de surtension (3) dépasse une température limite prédéterminée, dans lequel, dans l'état normal de l'élément de protection contre les surtensions (1), les éléments de connexion (4, 5) sont respectivement en contact électriquement conducteur avec un pôle du composant limiteur de surtension (3),
    caractérisé
    en ce que le composant limiteur de surtension (3) est disposé de manière à pouvoir tourner dans le boîtier (2),
    en ce que, dans l'état normal de l'élément de protection contre les surtensions (1), au moins un pôle du composant limiteur de surtension (3) est relié par l'intermédiaire d'une fiche de raccordement (8, 9) à un élément de connexion (4, 5),
    en ce qu'au moins un élément à ressort (12) est disposé entre le boîtier (2) et le composant limiteur de surtension (3) de manière à ce que, lors d'une surcharge thermique du composant limiteur de surtension (3), celui-ci soit mis en rotation par l'élément à ressort (12) de telle manière qu'au moins un pôle du composant limiteur de surtension (3) soit en contact électriquement conducteur avec l'élément de connexion (4, 5) associé, et
    en ce que la liaison interruptible thermiquement est disposée entre le composant limiteur de surtension (3) et le boîtier (2).
  2. Elément de protection contre les surtensions selon la revendication 1, caractérisé en ce qu'au moins un élément de support (13) est disposé dans le boîtier (2), lequel l'élément de support, dans l'état normal de l'élément de protection contre les surtensions (1) empêche une rotation du composant limiteur de surtension (3) due à la force de rappel de l'élément à ressort (12), dans lequel l'élément de support (13) est constitué d'un matériau qui ne fond que lorsque la température du composant limiteur de surtension (3) s'abaisse en dessous d'une température limite prédéterminée.
  3. élément de protection contre les surtensions selon la revendication 2, caractérisé en ce que l'élément de support (13) est constitué d'une matière plastique qui fond à une température supérieure à 110°C à 130°C, notamment d'un polyéthylène (PE), et de préférence d'un polyéthylène basse densité (LDPE) ou d'un polyéthylène haute densité (HDPE), ou de polycarbonate (PC).
  4. Elément de protection contre les surtensions selon l'une quelconque des revendication 1 à 3, caractérisé en ce que les deux pôles du composant limiteur de surtension (3) sont respectivement reliés de manière électriquement conductrice à une cosse de connexion (6, 7), et en ce que, dans l'état normal de l'élément de protection contre les surtensions (1), les deux pôles du composant limiteur de surtension (3) sont respectivement reliés par l'intermédiaire d'une fiche de raccordement (8, 9) à un élément de connexion (4, 5), dans lequel les cosses de connexion (6, 7) sont de préférence réalisées sous la forme de connecteurs mâles, et en ce que les éléments de connexion (4, 5) sont de préférence réalisés sous la forme de connecteurs femelles correspondants.
  5. Elément de protection contre les surtensions selon la revendication 4, caractérisé en ce que le composant limiteur de surtension (3) est réalisé sous forme de disque et en ce que les deux cosses de connexion (6, 7) sont disposées à deux positions du composant limiteur de surtension (3) qui sont décalées l'une par rapport à l'autre de 90°, notamment à sa périphérie extérieure (14).
  6. Elément de protection contre les surtensions selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'un premier pôle du composant limiteur de surtension (3) est relié de manière électriquement conductrice à une cosse de connexion (6) qui, dans l'état normal du composant de protection contre les surtensions (1) est reliée par l'intermédiaire d'une fiche de raccordement (8) au premier élément de connexion (4), et en ce que l'autre pôle est relié par l'intermédiaire d'un raccord tournant (15) au second élément de connexion (5).
  7. Elément de protection contre les surtensions selon la revendication 6, caractérisé en ce que le second pôle du composant limiteur de surtension (3) est relié à un pivot (16) et en ce que le second élément de connexion (5) associé est relié à une monture tournante (17).
  8. Elément de protection contre les surtensions selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'une pluralité de galets de roulement (18) sont disposés dans le boîtier (2).
  9. Elément de protection contre les surtensions selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il est prévu un indicateur optique d'état (19) et en ce qu'une fenêtre d'inspection (21) est ménagée dans la face supérieure (20) du boîtier (2).
  10. Elément de protection contre les surtensions selon la revendication 9, caractérisé en ce que l'indicateur optique d'état (19) est agencé sous la forme d'une couleur ou d'une feuille colorée sur le composant limiteur de surtension (3), notamment sur sa périphérie extérieure (14).
  11. Elément de protection contre les surtensions selon l'une quelconque des revendications 1 à 10, caractérisé en ce qu'il est prévu une goupille de déclenchement de préférence chargée par ressort pour actionner un contact de télécommunication faisant saillie à travers une ouverture ménagée dans la face inférieure du boîtier (2).
  12. Elément de protection contre les surtensions selon l'une quelconque des revendications 2 à 11, caractérisé en ce que le boîtier (2) est réalisé en deux parties, une partie du boîtier (22) recevant de préférence le composant limiteur de surtension (3), les éléments de connexion (4, 5), l'élément à ressort (12) et l'élément de support (13) et l'autre partie de boîtier (23) étant réalisée sous la forme d'un couvercle.
EP10006445.0A 2009-06-25 2010-06-22 Elément de protection contre les surtensions Not-in-force EP2267850B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009030629A DE102009030629A1 (de) 2009-06-25 2009-06-25 Überspannungsschutzelement

Publications (3)

Publication Number Publication Date
EP2267850A2 EP2267850A2 (fr) 2010-12-29
EP2267850A3 EP2267850A3 (fr) 2013-05-15
EP2267850B1 true EP2267850B1 (fr) 2014-12-03

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EP10006445.0A Not-in-force EP2267850B1 (fr) 2009-06-25 2010-06-22 Elément de protection contre les surtensions

Country Status (4)

Country Link
US (1) US8482896B2 (fr)
EP (1) EP2267850B1 (fr)
CN (1) CN101938110B (fr)
DE (1) DE102009030629A1 (fr)

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CZ301709B6 (cs) * 2005-05-04 2010-06-02 Kiwa Spol. S R. O. Prepetová ochrana
CN100533605C (zh) * 2006-03-03 2009-08-26 隆科电子(惠阳)有限公司 具有超温脱离机构和压敏电阻器的总成

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US20100328829A1 (en) 2010-12-30
US8482896B2 (en) 2013-07-09
EP2267850A2 (fr) 2010-12-29
DE102009030629A1 (de) 2010-12-30
CN101938110A (zh) 2011-01-05
CN101938110B (zh) 2015-04-01
EP2267850A3 (fr) 2013-05-15

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