EP2947672A1 - Disjoncteur de protection avec mécanisme de déclenchement à bascule - Google Patents

Disjoncteur de protection avec mécanisme de déclenchement à bascule Download PDF

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Publication number
EP2947672A1
EP2947672A1 EP14001876.3A EP14001876A EP2947672A1 EP 2947672 A1 EP2947672 A1 EP 2947672A1 EP 14001876 A EP14001876 A EP 14001876A EP 2947672 A1 EP2947672 A1 EP 2947672A1
Authority
EP
European Patent Office
Prior art keywords
arm
force
spring
lever
pole bridge
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Withdrawn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
EP14001876.3A
Other languages
German (de)
English (en)
Inventor
Marko RODE
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.)
Nela Razvojni Center za Elektroindustrijo in Elektroniko doo
Original Assignee
Nela Razvojni Center za Elektroindustrijo in Elektroniko doo
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 Nela Razvojni Center za Elektroindustrijo in Elektroniko doo filed Critical Nela Razvojni Center za Elektroindustrijo in Elektroniko doo
Publication of EP2947672A1 publication Critical patent/EP2947672A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
    • H01H73/38—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by lever
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • 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
    • H01H71/505—Latching devices between operating and release 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

Definitions

  • the present invention relates to a protective circuit breaker with a toggle trip mechanism, wherein the mechanism and the design of the contacts allow its basic function to be performed, which is to say, the contacts to be switched on and off by means of a manually operated lever and switched off in the presence of a disturbance in the electrical circuit, say, of a current differential between the phase and the neutral conductor.
  • the invention disclosed herein pertains to classes H01H71/10, H01H71/52 of the international patent classification.
  • the technical problem adequately solved by the mechanism of the proposed design is to provide a configuration allowing, in the event of a disturbance in the electrical circuit, disconnections to be consistent and less dependent on external factors. Said mechanism also enables the electrical circuit to be manually switched on and off.
  • the mechanism of the present invention meets the requirements of a quick and reliable disconnection of the electrical circuit when an irregularity is encountered in the said electrical circuit, while ensuring an immediate disconnection should there be a fault current already present when the circuit is being switched on (free tripping).
  • the mechanism according to the invention is composed of a lever 1, pivotally secured in the mechanism enclosure and having a cylindrical support whereon a tension spring 15 is attached, a journaled wheel 18 being mounted on a second cylindrical support.
  • the spring 15 serves as an energy store, expanding from the beginning of activation up to the moment when the lever 1 tips over.
  • the energy stored in the spring 15 connects a contact 10 with a contact 13 and compresses a contact spring 11.
  • a pole bridge 9 is journaled within the mechanism enclosure and serves as support for the contact/s 10, holding an arbitrary number thereof, in most cases two or four.
  • the contact 10 is movably secured to the pole bridge 9 and biased by the spring 11, which is partially compressed, urging the contact 10 against the pole bridge 9 with a force 12.
  • the spring 11 serves to cushion the contacts when they impact and to ensure with the force 12 that the contacts 10 and 13 make good connection when closed.
  • the loaded spring 15 is attached with its upper end to the lever 1, and with its lower end to a shaft 25, which penetrates an arm 19.
  • the arm 19 is pivotally anchored to the enclosure, so that one end thereof, specifically its point of connection with the shaft 25, is pulled upwardly by a force 14 of the loaded spring 15, while the other end thereof, specifically its point of connection with an arm 6, transmits the force 14 to the pivotally fixed arm 6.
  • the arm 6 is pivotally connected to an arm 5 and exerts a force 7 at a distance b below the point of connection of the pole bridge 9 and the arm 5.
  • the distance b represents the distance between the vector of the force 7 and the joint of the pole bridge 9 and the arm 5.
  • the force 7 thus keeps the pole bridge 9 in a switched-on state, the latter, in turn, compressing the contact spring 11.
  • the force 7 acts on an arm 3, which is pivotally connected to the arm 5 and to an arm 2, resulting in a closing force 4 being applied at a distance a above the pivotable anchor of the arm 2.
  • the closing force 4 starts acting as soon as the contacts 10 and 13 are brought together, pushing the arm 2 towards a rest 21, which is part of the mechanism enclosure.
  • the arm 2 is prevented from pivoting, whereby the prerequisite for the arm 5 to be retained is met and the mechanism remains switched on.
  • the same state is also established when there is an external disturbance, such as vibration. Minor force impulses which would add up in a mechanism with a conventional locking engagement, leading to the engagement creeping and eventually to the breaker tripping, are automatically canceled with the mechanism of the invention.
  • a relay In the presence of a fault condition in the electrical circuit a relay is triggered, pushing an arm 16 with a force 20, so that it rotates about its pivot in the enclosure and via the associated torque transfers a force 27 to the arm 2, making it rotate about its pivotable anchor within the enclosure, whereby the application point of the force 4 is displaced below the pivotable anchor of the arm 2 within the enclosure - the distance a being the distance between the vector of the force 4 and the pivotable anchor of the arm 2, which distance increases, leading to a further rotary movement of the arm 2 away from the rest 21.
  • the arm 5 thus loses support and flips over its pivot within the pole bridge 9.
  • the journaled wheel 18 loses support, releasing the lever 1, which is pivoted by a force 14, exerted so long as the spring 15 is contracting.
  • the lever 1 assumes the intermediate position between on and off (TRIP), clearly signalizing a fault current.
  • the breaker is reset for a new activation cycle by pushing the lever 1 with a force 24 into a switched-off state.
  • a shaft 25 abuts against the lever 1, which pushes it with a force 23, pivoting the arm 19, which moves the arms 6, 5, 3 by means of a torsion spring force 22, whereby the arm 2 is pivoted to abut against the rest 21.
  • the mechanism thus assumes its initial state.
  • the spring 15 is slightly loaded, keeping the arm 1 in a switched-off state.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Breakers (AREA)
EP14001876.3A 2014-05-23 2014-05-29 Disjoncteur de protection avec mécanisme de déclenchement à bascule Withdrawn EP2947672A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SI201400194A SI24728A (sl) 2014-05-23 2014-05-23 Zaščitno stikalo s klecnim mehanizmom proženja

Publications (1)

Publication Number Publication Date
EP2947672A1 true EP2947672A1 (fr) 2015-11-25

Family

ID=51014146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14001876.3A Withdrawn EP2947672A1 (fr) 2014-05-23 2014-05-29 Disjoncteur de protection avec mécanisme de déclenchement à bascule

Country Status (2)

Country Link
EP (1) EP2947672A1 (fr)
SI (1) SI24728A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113963966A (zh) * 2020-07-20 2022-01-21 上海良信电器股份有限公司 一种分闸开关和远程断路器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3242286A (en) * 1962-12-24 1966-03-22 Heinemann Electric Co Circuit breaker linkage having a toggle link of variable length
US4679018A (en) 1986-01-15 1987-07-07 Westinghouse Electric Corp. Circuit breaker with shock resistant latch trip mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3242286A (en) * 1962-12-24 1966-03-22 Heinemann Electric Co Circuit breaker linkage having a toggle link of variable length
US4679018A (en) 1986-01-15 1987-07-07 Westinghouse Electric Corp. Circuit breaker with shock resistant latch trip mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113963966A (zh) * 2020-07-20 2022-01-21 上海良信电器股份有限公司 一种分闸开关和远程断路器

Also Published As

Publication number Publication date
SI24728A (sl) 2015-11-30

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