EP4533507A1 - Dispositif de protection contre les surtensions comportant une protection intégrée améliorée contre les surchauffes - Google Patents

Dispositif de protection contre les surtensions comportant une protection intégrée améliorée contre les surchauffes

Info

Publication number
EP4533507A1
EP4533507A1 EP23729298.2A EP23729298A EP4533507A1 EP 4533507 A1 EP4533507 A1 EP 4533507A1 EP 23729298 A EP23729298 A EP 23729298A EP 4533507 A1 EP4533507 A1 EP 4533507A1
Authority
EP
European Patent Office
Prior art keywords
contact
bimetal
protection device
overvoltage protection
breaker
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.)
Pending
Application number
EP23729298.2A
Other languages
German (de)
English (en)
Inventor
Robert IEREB
Simon ZEMAN
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.)
Eaton Intelligent Power Ltd
Original Assignee
Eaton Intelligent Power Ltd
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 Eaton Intelligent Power Ltd filed Critical Eaton Intelligent Power Ltd
Publication of EP4533507A1 publication Critical patent/EP4533507A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • 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; Arresters
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/002—Thermally-actuated switches combined with protective means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/047—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • 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

Definitions

  • the fixed contact is soldered to the movable contact in the original cold state of the overvoltage protection device with integrated overtemperature protection.
  • fast operation of the bimetal contact breaker is provided or supported because the contact pair of the bimetal contact breaker is kept close for a long time by the non-liquefied solder joint.
  • bending stress is generated in the same without a factual shape change.
  • the temperature of the solder joint reaches a critical point, the same liquefies and causes a discharge of the bending stress within the bimetal bar and a sudden shape change and movement of its movable end.
  • the fixed end of the bimetal bar is welded to one of the terminals if the fixed contact is formed by the contact tab or if the fixed contact is mounted to the contact tab or is welded to a contact tab of the varistor.
  • the spark gap comprises a contact tab, which forms the fixed contact or which the fixed contact of the bimetal contact breaker or the fixed end of the bimetal bar is mounted to or a parallel connection of the varistor and the spark gap comprises a common contact tab, which forms the fixed contact of the bimetal contact breaker or which the fixed contact or the fixed end of the bimetal bar is mounted to.
  • the fixed contact is soldered to the the movable contact and the fixed end of the bimetal bar is welded to one of the terminals or to a contact tab of the varistor depending on where the movable contact is located in a first step.
  • the bimetal bar is bent by a part of the housing.
  • the overvoltage protection device with integrated overtemperature protection can comprise a latching element, which holds the bimetal bar in its open position once the bimetal contact breaker opens.
  • the bimetal bar can move from its closed position to its open position when it is heated, but it cannot move back when it cools down again.
  • the latching element in particular may be made of an elastic material like elastic plastic or may be spring loaded.
  • the blocking element is “irreversibly” moved between the fixed contact and the movable contact when the bimetal contact breaker opens. It is also to be noted that manual intervention, which is not intended by design, like disassembling or destroying the housing of the overvoltage protection device with integrated overtemperature protection, is not considered as manual intervention in the aforementioned sense.
  • Fig. 1 shows an oblique view of a first example of an overvoltage protection device with integrated overtemperature protection in its operational state
  • Fig. 2 shows the overvoltage protection device with integrated overtemperature protection of Fig. 1 in its defective state
  • Fig. 9 shows an oblique view of an overvoltage protection device with integrated overtemperature protection with a rotating blocking element in its operational state
  • Fig. 12 shows a circuit diagram of an embodiment with a spark gap.
  • the fixed end E1 of the bimetal bar 8a is welded to the terminal 5. In this way, unintentional separation from the bimetal bar 8a from the terminal 5 can be avoided when the bimetal bar 8 is heated up.
  • the fixed end E1 of the bimetal bar 8a can be welded to the contact tab of the varistor 3, and the fixed contact 7 can be arranged on or formed by the terminal 5.
  • the movable contact 9 is soldered to the fixed contact 7 on the terminal 5, in another embodiment it is not.
  • the bimetal bar 8a is held in its preloaded position.
  • the fixed contact 7 is soldered to the the movable contact 9 and the fixed end E1 of the bimetal bar 8a is welded to the terminal 5 in a first step.
  • the bimetal bar 8a is bent by a part of the housing 8a.
  • Figs. 3 and 4 show a further embodiment of an overvoltage protection device with integrated overtemperature protection 1 b, which is similar to the overvoltage protection device with integrated overtemperature protection 1a of Figs. 1 and 2.
  • Fig. 3 shows the overvoltage protection device with integrated overtemperature protection 1 b in the original cold state ready for operation and Fig. 4 in its defective state.
  • the overvoltage protection device with integrated overtemperature protection 1b comprises an opening or window 13 in its housing 2
  • further on the overvoltage protection device with integrated overtemperature protection 1b comprises an optical indicator 14a.
  • the blocking element 16a is spring loaded and forced between the fixed contact 7 and the movable contact 9 by the spring 17, which is connected to the blocking element 16a via the connecting strip 18.
  • the blocking element 16a is pulled between the fixed contact 7 and the movable contact 9 and impedes reclosing of the bimetal contact breaker 4d.
  • the blocking element 16a keeps the bimetal contact breaker 4d open even when the bimetal bar 8 cools down again after opening. Moreover, no manual intervention to unlock the overvoltage protection device with integrated overtemperature protection 1d is rendered possible in this embodiment. Accordingly, the blocking element 16a is “irreversibly” moved between the fixed contact 7 and the movable contact 9 when the bimetal contact breaker 4d opens.
  • the arrangement of the spring 17 and the use of the connecting strip 18 is not mandatory, but the spring 17 can also directly be mounted to the blocking element 16a and can be built into the housing 3 vertically.
  • Fig. 11 shows a detailed view of a preferred embodiment.
  • the bimetal bar 8f comprises a notch 20 and the blocking element 16c comprises a nose 21 .
  • the nose 21 engages with the notch 20 and impedes a back rotation of the blocking element 16c and thus a reclosing of the bimetal contact breaker 4f.
  • Fig. 11 in detail also shows an optical indicator 14c on the top of the blocking element 16c. Similar to other optical indicators disclosed before, the optical indicator 14c may comprise symbols and/or colors on its top side, which indicate the operational state of the overvoltage protection device with integrated overtemperature protection 1f through the window 13. Again, the blocking element 16c forms a combined blocking and indicator element.
  • thermosensitive contact breaker I bimetal contact breaker

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

Un dispositif de protection contre les surtensions comportant une protection intégrée contre les surchauffes (1a..1f) est divulgué, qui comprend un boîtier (2), une varistance (3) disposée dans le boîtier (2), un disjoncteur thermosensible (4, 4a..4f) qui est disposé dans le boîtier (2) et qui est électriquement connecté en série avec la varistance (3), et deux bornes (5, 6) faisant saillie à travers le boîtier (2), qui sont électriquement connectées à la connexion en série de la varistance (3) et du disjoncteur thermosensible (4, 4a..4f). Le disjoncteur thermosensible (4, 4a..4f) se présente sous la forme d'un disjoncteur bimétallique.
EP23729298.2A 2022-05-26 2023-05-25 Dispositif de protection contre les surtensions comportant une protection intégrée améliorée contre les surchauffes Pending EP4533507A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2207786.1A GB2619066A (en) 2022-05-26 2022-05-26 Overvoltage protection device with improved integrated overtemperature protection
PCT/EP2023/025246 WO2023227248A1 (fr) 2022-05-26 2023-05-25 Dispositif de protection contre les surtensions comportant une protection intégrée améliorée contre les surchauffes

Publications (1)

Publication Number Publication Date
EP4533507A1 true EP4533507A1 (fr) 2025-04-09

Family

ID=82324088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23729298.2A Pending EP4533507A1 (fr) 2022-05-26 2023-05-25 Dispositif de protection contre les surtensions comportant une protection intégrée améliorée contre les surchauffes

Country Status (4)

Country Link
EP (1) EP4533507A1 (fr)
CN (1) CN119256384A (fr)
GB (1) GB2619066A (fr)
WO (1) WO2023227248A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119361374A (zh) * 2024-11-28 2025-01-24 佛山市高明欧一电子制造有限公司 一种过热止复保护器

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1664977U (de) * 1952-07-25 1953-10-15 Siemens Ag Einrichtung an ueberspannungsableitern.
US3805022A (en) * 1972-10-10 1974-04-16 Texas Instruments Inc Semiconducting threshold heaters
US4168514A (en) * 1977-12-16 1979-09-18 General Electric Company Combination circuit breaker-lightning arrestor
JPH0775453B2 (ja) * 1991-03-22 1995-08-09 三菱マテリアル株式会社 通信回線用サージ吸収器
AT406207B (de) * 1997-09-30 2000-03-27 Felten & Guilleaume Ag Oester Steckbarer überspannungsableiter
FR2848353B1 (fr) * 2002-12-10 2005-06-17 Soule Protection Surtensions Dispositif de protection contre des surtensions
FR2897989B1 (fr) * 2006-02-24 2008-05-09 Soule Prot Surtensions Sa Dispositif de protection contre les surtensions avec systeme de visualisation simplifie et procede de fabrication correspondant
DE102006036598A1 (de) * 2006-04-26 2007-10-31 Dehn + Söhne Gmbh + Co. Kg Verfahren zur Dimensionierung einer Abtrennvorrichtung für Überspannungsableiter
DE102008049472A1 (de) * 2007-10-16 2009-09-10 Dehn + Söhne Gmbh + Co. Kg Überspannungsableiter mit mindestens einem Ableitelement, insbesondere einem Varistor, sowie mit einer Abtrennvorrichtung
FR2925216B1 (fr) * 2007-12-18 2010-04-23 Abb France Dispositif de protection contre les surtensions comportant un auxiliaire de deconnexion
GB2546492A (en) * 2016-01-19 2017-07-26 Mpe Ip Ltd Varistors

Also Published As

Publication number Publication date
CN119256384A (zh) 2025-01-03
GB202207786D0 (en) 2022-07-13
WO2023227248A1 (fr) 2023-11-30
GB2619066A (en) 2023-11-29

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