EP4033514A1 - Beweglicher kontaktschwingungsdämpfer - Google Patents

Beweglicher kontaktschwingungsdämpfer Download PDF

Info

Publication number
EP4033514A1
EP4033514A1 EP22151091.0A EP22151091A EP4033514A1 EP 4033514 A1 EP4033514 A1 EP 4033514A1 EP 22151091 A EP22151091 A EP 22151091A EP 4033514 A1 EP4033514 A1 EP 4033514A1
Authority
EP
European Patent Office
Prior art keywords
push rod
contact
stop surface
moving contact
circuit 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
EP22151091.0A
Other languages
English (en)
French (fr)
Inventor
Bernd Spritzendorfer
Michael Ertl
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 EP4033514A1 publication Critical patent/EP4033514A1/de
Pending legal-status Critical Current

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Classifications

    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • the present disclosure relates to a trigger device according to the generic part of claim 1.
  • a trigger device comprising a simple push rod to push away a latch triggering a moving contact from a fixed contact in a circuit breaker in the event of a short circuit.
  • a trigger device comprising a simple push rod to push away a latch triggering a moving contact from a fixed contact in a circuit breaker in the event of a short circuit.
  • the aforementioned circuit breaker has the disadvantage, that after the trigger device got triggered and therefore said contacts are disconnected from each other, the moving contact may bounce back generating an electric arc and therefore eroding and physically damaging said contacts. As a result, the lifespan of the contacts is shortened and therefore the lifespan of the circuit breaker is shortened.
  • the trigger device fulfils the object and has the advantages that a safe operation of the circuit breaker is enabled and the lifespan of the moving contact and the fixed contact is prolonged.
  • the push rod comprises at least two different stop surfaces, whereby at least one first stop surface is adapted to contact a latch in order to trigger said latch of the circuit breaker and at least one second stop surface is adapted to contact a moving contact of the circuit breaker, a backward movement of the moving contact in direction of the fixed contact is prevented and said contacts can be disconnected safely from each other without damage inflicted by a bouncing moving contact.
  • the advantages of the trigger device comply with the advantages of the circuit breaker.
  • a circuit breaker 2 comprising a trigger device 1
  • the circuit breaker further comprising a moving contact 9 which contacts a fixed contact 10 in a closed position, a spring loaded latch 7 to disconnect said moving contact 9 from the fixed contact 10, whereby the first stop surface 6 is adapted to trigger said latch 7 to mechanically disconnect the moving contact 9 from the fixed contact 10 and the second stop surface 8 is adapted to contact said moving contact 9 to prevent a backward movement of the moving contact 9 in direction of said fixed contact 10.
  • the trigger device 1 fulfils the object and has the advantages that a safe operation of the circuit breaker 2 is enabled and the lifespan of the moving contact 9 and the fixed contact 10 is prolonged.
  • the push rod 3 comprises at least two different stop surfaces 6,8, whereby at least one first stop surface 6 is adapted to contact a latch 7 in order to trigger said latch 7 of the circuit breaker 2 and at least one second stop surface 8 is adapted to contact a moving contact 9 of the circuit breaker 2, a backward movement of the moving contact 9 in direction of the fixed contact 10 is prevented and said contacts 9,10 can be disconnected safely from each other without damage inflicted by a bouncing moving contact 9.
  • a circuit breaker 2 is an automatically operated electrical device which is designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit.
  • circuit breaker 2 may comprehensively refer to a miniature circuit breaker (MCB) or to a residual current circuit breaker with overcurrent protection (RCBO) or to an arc fault detection device (AFDD).
  • MBB miniature circuit breaker
  • RCBO residual current circuit breaker with overcurrent protection
  • AFDD arc fault detection device
  • the trip current for the circuit breaker 2 is approximately 10 times higher than the rated current. For example, if the rated current is 16 A, it can be preferred, that the trip current is approximately 160 A.
  • Said trigger device 1 comprises a movably guided push rod 3 which is particularly located in a push rod housing 4.
  • Said push rod housing 4 could comprise a bearing element.
  • a ferromagnetic anchor is attached to a rear end of the nonmagnetic push rod 3.
  • Said push rod 3 might be spring loaded.
  • a coil 5 is substantially wrapped around said push rod housing 4. In case of an overcurrent or short circuit, a magnetic field is formed via said coil 5 moving said ferromagnetic anchor and thus pushing said push rod 3 out of the push rod housing 4 to a defined extent.
  • the push rod 3 comprises at least two different stop surfaces 6, 8, whereby at least one first stop surface 6 is adapted to contact a latch 7 in order to trigger said latch 7 of the circuit breaker 2 and at least one second stop surface 8 is adapted to contact a moving contact 9 of the circuit breaker 2 to prevent a backward movement of the moving contact 9 in direction of a fixed contact 10.
  • Said circuit breaker 2 comprises said trigger device 1 and further a spring loaded moving contact 9 which contacts a fixed contact 10 in a closed position, and a latch 7 to mechanically disconnect said moving contact 9 from the fixed contact 10.
  • the push rod 3 has a movement direction predefined by the push rod housing 4 and that the at least one first stop surface 6 and the at least one second stop surface 8 are arranged staggered to each other in said movement direction.
  • said push rod 3 is linearly guided in the push rod housing 4.
  • the push rod 3 can be manufactured in an easy and compact way.
  • the second stop surface 8 is located at a protrusion, which, in particular, protrudes the centre of the first stop surface 6, which is exemplarily shown in figs. 6 and 7 .
  • the second stop surface 8 can easily be staggered from the first stop surface 6.
  • the first stop surface 6 is particularly annular and surrounding the protrusion. This feature is also exemplarily shown in figs. 6 and 7 .
  • the latch 7 has a gap for the penetration of the second stop surface 8.
  • the second stop surface 8 penetrates said gap and contacts the moving contact 9 to prevent the moving contact 9 from bouncing in the direction of the fixed contact 10.
  • the push rod 3 is pushed out of the push rod housing 4 due to electromagnetic forces.
  • the push rod 3 hits with its first stop surface 6 a latch 7, whereby said latch is loosened from its latching point and pushes away the moving contact 9 from the fixed contact 10 and thereby disconnecting said contacts 9, 10, which is exemplarily illustrated in Fig. 1 to 3 .
  • Said moving contact 9 is pushed against a stop within the frame of the circuit breaker 2 and may swing back towards the fixed contact 10, which is exemplarily illustrated in Fig. 4 .
  • Fig. 5 exemplarily illustrates the contacting of the moving contact 9 with the second stop surface 10 of the push rod 3.
  • the push rod 3 is held in its triggered position because the electromagnetic mechanism is still in operation because the emerging arc keeps the current still flowing through the coil.
  • the moving contact 9 swings towards the fixed contact 10 and contacts the second stop surface 10 of the push rod 3 keeping the contacts 9, 10 at a maximum distance from each other.
  • a feature X or an object Y is distinguished in several embodiments, unless otherwise defined by the disclosure of the invention.
  • a feature X or object Y with an ordering number word in a claim does not mean that an embodiment of the invention covered by this claim must have a further feature X or another object Y.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
EP22151091.0A 2021-01-20 2022-01-12 Beweglicher kontaktschwingungsdämpfer Pending EP4033514A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2100722.4A GB2602968A (en) 2021-01-20 2021-01-20 Moving contact oscillating damper

Publications (1)

Publication Number Publication Date
EP4033514A1 true EP4033514A1 (de) 2022-07-27

Family

ID=74678903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22151091.0A Pending EP4033514A1 (de) 2021-01-20 2022-01-12 Beweglicher kontaktschwingungsdämpfer

Country Status (2)

Country Link
EP (1) EP4033514A1 (de)
GB (1) GB2602968A (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2040573A (en) * 1979-02-07 1980-08-28 Wolff H W Improvements in electric circuit breakers
DE102004056279A1 (de) * 2004-11-22 2006-05-24 Abb Patent Gmbh Schaltgerät mit einem thermischen und elektromagnetischen Auslöser
DE102006037225A1 (de) * 2006-08-09 2008-02-14 Siemens Ag Schalt-Einheit
DE102006055936A1 (de) * 2006-11-27 2008-06-12 Siemens Ag Selektiver Leitungsschutzschalter
WO2009121696A1 (de) * 2008-04-02 2009-10-08 Siemens Aktiengesellschaft Auslösemechanismus
EP2680293A1 (de) * 2012-06-25 2014-01-01 Siemens Aktiengesellschaft Auslösemechanismus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5333253B2 (ja) * 2010-01-19 2013-11-06 三菱電機株式会社 回路遮断器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2040573A (en) * 1979-02-07 1980-08-28 Wolff H W Improvements in electric circuit breakers
DE102004056279A1 (de) * 2004-11-22 2006-05-24 Abb Patent Gmbh Schaltgerät mit einem thermischen und elektromagnetischen Auslöser
DE102006037225A1 (de) * 2006-08-09 2008-02-14 Siemens Ag Schalt-Einheit
DE102006055936A1 (de) * 2006-11-27 2008-06-12 Siemens Ag Selektiver Leitungsschutzschalter
WO2009121696A1 (de) * 2008-04-02 2009-10-08 Siemens Aktiengesellschaft Auslösemechanismus
EP2680293A1 (de) * 2012-06-25 2014-01-01 Siemens Aktiengesellschaft Auslösemechanismus

Also Published As

Publication number Publication date
GB2602968A (en) 2022-07-27
GB202100722D0 (en) 2021-03-03

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