EP2811493A2 - Schaltungsschutzeinrichtung - Google Patents

Schaltungsschutzeinrichtung Download PDF

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Publication number
EP2811493A2
EP2811493A2 EP14170250.6A EP14170250A EP2811493A2 EP 2811493 A2 EP2811493 A2 EP 2811493A2 EP 14170250 A EP14170250 A EP 14170250A EP 2811493 A2 EP2811493 A2 EP 2811493A2
Authority
EP
European Patent Office
Prior art keywords
voltage
voltage sensitive
tubular
tubular sections
sensitive assembly
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.)
Withdrawn
Application number
EP14170250.6A
Other languages
English (en)
French (fr)
Other versions
EP2811493A3 (de
Inventor
Jerry L. Mosesian
Jean-Francois De Palma
Mark A. Radzim
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.)
Mersen USA Newburyport MA LLC
Original Assignee
Mersen USA Newburyport MA LLC
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
Priority claimed from US13/910,600 external-priority patent/US8810988B2/en
Application filed by Mersen USA Newburyport MA LLC filed Critical Mersen USA Newburyport MA LLC
Publication of EP2811493A2 publication Critical patent/EP2811493A2/de
Publication of EP2811493A3 publication Critical patent/EP2811493A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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 present invention relates generally to circuit protection devices and, more particularly, to a device that suppresses transient current/voltage surges.
  • a first terminal is electrically connected to the first surface of the voltage sensitive assembly and to the first conductive component.
  • a thermal element is electrically connected to the second surface of the voltage sensitive assembly.
  • the thermal element is an electrically conductive solid at room temperature and has a predetermined softening temperature.
  • a second terminal is electrically connected to the second conductive component.
  • the second terminal has a contact portion in electrical connection with the second surface of the voltage sensitive assembly. The voltage sensitive assembly senses the voltage drop between the first conductive element and the second conductive element.
  • the second portion of the one of the terminals extends over at least a portion of the non-conductive barrier and bends toward the thermal element so that the contact portion is held by the thermal element until the thermal element begins to soften.
  • the non-conductive barrier is biased toward the thermal element, but is constrained from movement toward the thermal element by contact with the second portion of the one of the terminals at a location that is spaced away from the contact portion, until the thermal element begins to soften.
  • a thermal element is electrically connected to the second surface of the voltage sensitive assembly.
  • the thermal element is an electrically conductive solid at room temperature and has a predetermined softening temperature.
  • a second terminal is formed of a spring metal having one end in electrical connection with the second surface of the voltage sensitive assembly and another end connected to the second conductive component.
  • the voltage sensitive assembly senses a voltage drop between the first conductive component and the second conductive component.
  • the second terminal is bent from a normal and relaxed configuration to be maintained in contact with the voltage sensitive assembly by the thermal element.
  • Receiver 16 is pivotally movable to housing 14 and is movable between an opened position, as shown in FIG. 1 , and a closed position, wherein the ends of a fuse or circuit protection device 10 are in electrical contact with contact blades 24, as will be better understood from a further reading of the present specification.
  • a voltage sensitive element (MOV) 52 Disposed within the casing is a voltage sensitive element (MOV) 52, having an outwardly facing, first surface 52a, and an inwardly facing, second surface 52b.
  • the voltage sensitive element (MOV) 52 is tubular in shape, wherein the cylindrical outer surface of the voltage sensitive element (MOV) 52 defines first surface 52a and the cylindrical inner surface of voltage sensitive element (MOV) 52 defines second surface 52b.
  • Voltage sensitive element (MOV) 52 is dimensioned to fit within casing 32.
  • Voltage sensitive element (MOV) 52 has an axial length slightly less than the axial length of casing 32, as shall be described in greater detail below.
  • a second terminal 74 is comprised of a base portion 76 and an arm portion 78.
  • base portion 76 has a flat, circular plate-like configuration and arm portion 78 has an elongated, flat, rectangular strip-like configuration.
  • arm portion 78 extends generally perpendicular from base portion 76.
  • Base portion 76 and arm portion 78 are preferably integrally formed from a rigid, electrically conductive, flat, plate-like or sheet-like material.
  • second terminal 74 i.e., base portion 76 and arm portion 78, is formed from a copper plate.
  • End caps 92, 94 are provided on the distal ends of casing 32 for locking first and second terminals within casing 32.
  • Each cap 92, 94 is dimensioned to enclose one end of casing 32.
  • each end cap 92, 94 is cup-shaped and has a circular base wall portion 96 and a cylindrical side wall portion 98.
  • Caps 92, 94 are attached to casing 32 by crimping the opened end of side wall portions 98 onto casing 32.
  • the open ends of side wall portions 98 of caps 92, 94 are crimped, such that the free edge of side wall portion 98 of each cap 92, 94 is forced into an annular recess 42 formed on outer surface 36 of casing 32.
  • thermal element 122 is a solder material that has a relatively low softening temperature or melting temperature.
  • a low melting temperature metal alloy or a polymer having a low softening temperature may be used.
  • Thermal element 122 is preferably a solid at room temperature (25°C) and a solid up to a temperature around 35°C.
  • thermal element 122 has a melting temperature or a softening temperature of between about 70°C and 140°C and, more preferably, has a melting temperature or softening temperature of between 90°C and about 100°C.
  • barrier element 132 is provided to be movable within casing 32. As shall be described in greater detail below, barrier element 132 is essentially an arc shield. More specifically, barrier element 132 is movable within second conductive lining 72. In the embodiment shown, barrier element 132 is generally a cup-shaped device having a flat circular base 132a with a cylindrical side wall 132b. Barrier element 132 defines a cylindrical inner cavity 132c. Cylindrical side wall 132b of barrier 132 is dimensioned such that barrier 132 is freely slidable within the opening defined by second conductive lining 72. Barrier element 132 is preferably integrally formed of an electrically insulating, non-conductive material, such as, by way of example and not limitation, a polymer material.
  • each circuit protection device 10 may have the same “rated nominal voltage,” in actuality, the "rated nominal voltage" of each of the MOVs within a circuit protection device 10 may vary between a V MIN and a V MAX . As a result, the current surge experienced by each circuit protection device 10 may not occur at the same instant, as shall hereinafter be described.
  • Circuit protection device 10 is a self-contained unit that is operable to suppress voltage spikes in a circuit and drop off-line when the voltage spike significantly exceeds the rated nominal voltage of the device to be protected thereby preventing catastrophic failure of the same.
  • FIG. 13 illustrates how the dimensions of a tubular section can further be modified to vary the operating conditions of the section.
  • FIG. 13 shows a voltage sensitive assembly 252C having a tubular section 294 that includes an inner portion 294a comprised of a varistor material and an outer portion 294b comprised of a conductive material.
  • the inner portion 294a of tubular section 294 is tubular in shape and has a wall thickness that is thinner than tubular sections 262, 264, 266, 268 heretofore described.
  • Outer portion 294b is tubular in shape and is dimensioned to maintain electrical contact with the inner surface of first conductive lining 62 of current protection device 10.
  • a tubular section 294 having a conductive outer portion 294b and an inner tubular portion 294a formed of a varistor material the voltage and current operating characteristics of tubular section 294 are significantly different as compared to tubular sections 262, 264, 266, 268 that are formed solely of MOV material.
  • a circuit protection device 10 as heretofore described may utilize tubular sections formed of like varistor material or may include tubular sections formed of different materials.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Thermistors And Varistors (AREA)
  • Fuses (AREA)
EP14170250.6A 2013-06-05 2014-05-28 Schaltungsschutzeinrichtung Withdrawn EP2811493A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/910,600 US8810988B2 (en) 2011-11-04 2013-06-05 Circuit protection device

Publications (2)

Publication Number Publication Date
EP2811493A2 true EP2811493A2 (de) 2014-12-10
EP2811493A3 EP2811493A3 (de) 2014-12-31

Family

ID=50932963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14170250.6A Withdrawn EP2811493A3 (de) 2013-06-05 2014-05-28 Schaltungsschutzeinrichtung

Country Status (5)

Country Link
EP (1) EP2811493A3 (de)
JP (1) JP5847236B2 (de)
KR (1) KR101634862B1 (de)
CN (1) CN104242283A (de)
CA (1) CA2851850C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016119202A1 (de) * 2016-10-10 2018-04-12 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzelement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105914112A (zh) * 2016-06-06 2016-08-31 易事特集团股份有限公司 制造多路并联均流电路的方法、多路并联均流电路、太阳能充放电控制器和光伏系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6040971A (en) 1998-06-08 2000-03-21 Martenson; Kenneth R. Circuit protection device
US6256183B1 (en) 1999-09-09 2001-07-03 Ferraz Shawmut Inc. Time delay fuse with mechanical overload device and indicator actuator

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4965936U (de) * 1972-09-20 1974-06-10
CH659550A5 (de) * 1983-03-21 1987-01-30 Bbc Brown Boveri & Cie Spannungsbegrenzende durchfuehrung.
JPS6324605A (ja) * 1986-07-17 1988-02-02 松下電器産業株式会社 避電器
JPH01233708A (ja) * 1988-03-15 1989-09-19 Matsushita Electric Ind Co Ltd サージ吸収器
NO167618C (no) * 1989-03-20 1991-11-20 Alcatel Stk As Overspenningsavleder for elektriske apparater.
US5210676A (en) * 1991-03-13 1993-05-11 Mashikian Matthew S Electrical protective device
FR2676857B1 (fr) * 1991-05-22 1994-04-08 Gec Alsthom Sa Dispositif d'insertion d'une varistance, incorpore dans un disjoncteur a haute tension.
DE4331215B4 (de) * 1992-09-28 2005-02-10 Epcos Ag Baugruppe zur Ableitung elektrischer Überspannungen
JPH08213211A (ja) * 1995-02-07 1996-08-20 Matsushita Electric Ind Co Ltd 避雷器
US5781394A (en) * 1997-03-10 1998-07-14 Fiskars Inc. Surge suppressing device
DE19813135A1 (de) * 1998-03-25 1999-09-30 Asea Brown Boveri Überspannungsableiter
FR2798784B1 (fr) * 1999-09-17 2002-01-11 Francois Girard Dispositif de protection contre les surtensions
US7433169B2 (en) * 2005-12-15 2008-10-07 Raycap Corporation Overvoltage protection devices including wafer of varistor material
DE102008029670B4 (de) * 2008-06-24 2016-10-20 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzelement
US8477468B2 (en) * 2011-11-04 2013-07-02 Mersen Usa Newburyport-Ma, Llc Circuit protection device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6040971A (en) 1998-06-08 2000-03-21 Martenson; Kenneth R. Circuit protection device
US6256183B1 (en) 1999-09-09 2001-07-03 Ferraz Shawmut Inc. Time delay fuse with mechanical overload device and indicator actuator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016119202A1 (de) * 2016-10-10 2018-04-12 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzelement
DE102016119202B4 (de) 2016-10-10 2019-12-05 Phoenix Contact Gmbh & Co. Kg Überspannungsschutzelement

Also Published As

Publication number Publication date
KR20140143096A (ko) 2014-12-15
CA2851850A1 (en) 2014-12-05
JP5847236B2 (ja) 2016-01-20
CN104242283A (zh) 2014-12-24
KR101634862B1 (ko) 2016-06-29
JP2014239640A (ja) 2014-12-18
EP2811493A3 (de) 2014-12-31
CA2851850C (en) 2015-10-20

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