WO2023038556A1 - Mécanisme à deux leviers multifonction amélioré et simplifié, et disjoncteur miniature amélioré - Google Patents

Mécanisme à deux leviers multifonction amélioré et simplifié, et disjoncteur miniature amélioré Download PDF

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Publication number
WO2023038556A1
WO2023038556A1 PCT/SA2021/050014 SA2021050014W WO2023038556A1 WO 2023038556 A1 WO2023038556 A1 WO 2023038556A1 SA 2021050014 W SA2021050014 W SA 2021050014W WO 2023038556 A1 WO2023038556 A1 WO 2023038556A1
Authority
WO
WIPO (PCT)
Prior art keywords
lever
tripping
circuit breaker
thermal
trip
Prior art date
Application number
PCT/SA2021/050014
Other languages
English (en)
Inventor
Abdulsalam ALMUTLAQ
Original Assignee
Alfanar Company
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 Alfanar Company filed Critical Alfanar Company
Priority to PCT/SA2021/050014 priority Critical patent/WO2023038556A1/fr
Priority to CN202180102170.9A priority patent/CN117916842A/zh
Publication of WO2023038556A1 publication Critical patent/WO2023038556A1/fr

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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
    • 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

Definitions

  • the invention pertains to an improved & simplified multi-function Miniature Circuit Breaker having only Two-lever-assembly & other features.
  • the two-lever mechanism enables mechanical ON-OFF with trip-free feature, true contact position, sort circuit indication test button mechanism verification, auto-resetting, thermal tripping, magnetic tripping, multipole coupling and auxiliaries/accessories coupling.
  • a conventional miniature circuit breaker comprises a pair of contacts located in a main current path between a line terminal for connecting to a power supply and a load terminal for connecting to a load to be powered by the power supply.
  • the conventional miniature circuit breaker further includes a mechanism by which the miniature circuit breaker can be operated and gets signal from thermal and magnetic releases for the circuit protection during abnormal conditions or faults.
  • These mechanisms are typically complex in nature as they have to provide many functions while operating with optimum forces with the least tripping force and optimum contact pressure. At the same time, higher velocity is required to break the arc faster during short-circuit.
  • a conventional mechanism involves: a manual operating handle coupled to a connecting rod at one end and at the other end, connected to a jump-knuckle.
  • the jump-knuckle is connected to the tripping lever which gets signals from the thermal and magnetic release in case of fault, resulting in automatic tripping of the mechanism, independently from the handle, known as trip-free feature...
  • the moving contact is mounted on Contact support lever and rotates along-with the Contact support lever.
  • a device of this kind wherein a jump-knuckle lever is constituted with a hole designed to engage directly with the connecting rod end.
  • a mechanism of this kind is a "watchmechanism", making it difficult to manufacture, involving 3 or more levers making it time- consuming to assemble.
  • the object of the invention consists a miniature circuit breaker mechanism comprising minimum number of components making it easy to manufacture and assemble while operating with optimum forces,
  • the invention pertains to an improved & simplified operating mechanism of a miniature circuit breaker having only Two-lever-assembly.
  • the two-lever mechanism enables mechanical ON- OFF positions which is the main function to determine and to control the breaker whether to make it in a close(ON) or open(OFF) with trip-free feature.
  • the trip-free feature ensures positive tripping in the case of fault even if the handle is forcefully held in ON position (closed loopJ.Also, a true contact position indication is inbuilt in the 2-lever mechanism, where it will show the status of the loop inside the breaker irrespective of the handle position weather its ON or OFF.
  • the improved 2-lever-mechanism has also the thermal tripping feature which is covering one of the main functions to provide protection during over-load fault condition as well as the magnetic tripping which will efficiently receive the signal from the magnetic in any short-circuit faults.
  • the improved 2-lever-mechanism has the ability to connect a multipole coupling as well as the auxiliaries/accessories coupling features. The beauty of the improved two lever mechanism is that, along with multiple features it is easy for manufacturing and assembly coupled with the optimum forces, minimum trip-force and optimum contact pressure. , while clearing the fault quickly through the figure -like profile.
  • An object of the present invention is to provide an improved simplified mechanism device for a miniature circuit breaker and miniature circuit breaker comprising the same.
  • the current prior art is an improvement over Patent Publication No. 1049778 & IN201917047208. Multiple profiles have been added to the 2-lever mechanism to achieve multiple functions and features, while making it easy for manufacturing, assembly and optimum forces.
  • This prior-art also has a claim that is improvement over prior-art EP1703533A2.
  • the short-circuit feature is achieved using only 2 components ensuring ease of assembly whereas EP1703533A2 uses 3 components.
  • Figure 1 illustrates a miniature circuit breaker in accordance with aspects of the invention detailing the components which are the handle spring (1), handle (2), connect rod (3), contact support spring (4), contact support lever (5), mechanism spring(6), base [7], moving contact sub-assembiy(8), moving contact spring (9), tripping lever(lO), holding spring(ll), and thermal slider(12) , short circuit indication(13)&(14)
  • Figure 2 illustrates components of the 2-lever mechanism and the associated components when the miniature circuit breaker is in open loop position (OFF).
  • Figure 3 illustrates components of the 2-lever mechanism and the associated components when the miniature circuit breaker is in closed loop position (ON).
  • Figure 4 illustrates components of the 2-lever mechanism and the associated components when the miniature circuit breaker in at trip-free position, while the ON-OFF operation the two lever allows the mechanism to have a trip-free feature along with resetting.
  • Figure 5 illustrates the auxiliaries coupling position with the 2-lever mechanism component.
  • Figure 6 illustrates the multipole-coupling position with the 2-lever mechanism component.
  • FIG. 7 illustrates the simplified 2-lever assembly
  • Figure 8 illustrates aspects of the invention detailing to one of the components of the simplified 2-lever mechanism which is the contact support lever, as it shown in figure (1) that contact support will be assembled on the base (7) by the mechanism pin (6) through the center of contact support (5.2) which is also the mechanism pivot center, the radial rotation of the contact support lever(5) controlled by the handle (2) and through connect rod(3).
  • the rotation of the contact support lever(5) has a stopper in the base(7) which makes the mechanism stops positively on the mating surface in the contact support (5.1). also shown the shaft (5.3) projected on the contact support lever for the moving contact sub-assembly (8) from the top, making it easy for automatic assembly.
  • the bottom side of contact support lever will have the opening spring (4) assembled at the center surface of the contact support (5.5) and Socked by 2-arm, one arm stopped at the top of contact support center (5.7) and other arm stopped at the bottom center of the contact support (5.6), Once assembled in the base (7), one arm of the spring resting on (5.7), will rest on the base stopper, last but not the least, the top surface in the contact support lever (5.11) act as indication feature with green (OFF) and red (ON indication.
  • Figure 9 Illustrates aspects of the invention detailing the other component of the simplified 2-levers which is the tripping lever(lO), as it shown in figure (1) tripping Iever(10) assembly at the top of the contact support lever(5) by the mechanism pin (6) through the center (10.4), which is also the mechanism pivot center and locked by the holding spring(ll) which has 2- arms, one arm will be stopped by tripping lever spring stopper(10.6) and other arm stopped by the spring stopper at contact support lever (5.10).
  • the magnetic and thermal fault signals occurs in the back wall of the tripping lever (10.8) and thermal slider slot (10.5) respectively.
  • Figure 11 illustrates aspects of the invention of the din-rail holder added with a sliding feature.
  • This feature enables easy replacement/maintenance of the MCB when stacked along with other MCBs in the panel, especially when the panel is wired.
  • the sliding feature enables, the MCB to slide 'when un-screwed from the busbar panel and as a result it can be removed without having to remove the other MCBs.
  • This invention provides a miniature circuit breaker shown in figure (1) having a simplified 2- lever mechanism (5&10) that efficiently obtain multiple functions in 1 assembly which contains only two levers.
  • the simplified 2-lever mechanism enables mechanical ON-OFF operation with trip-free feature, true contact position, ON-OFF indication, auto-resetting, thermal tripping, magnetic tripping, multipole coupling and auxiliaries /accessories coupling.
  • a miniature circuit breaker figure (1) is provided with 2-lever assembly (7) to obtain the functions/features.
  • the miniature circuit breaker (1) comprises a housing or casing, optionally provided in two connectable halves, and the breaker assembly provides a main current path between the input terminal and the output terminal. Housing or casings are generally plastic and include appropriate mounting and insulation elements.
  • the miniature circuit breaker assembly includes mechanical mechanism shown in figure (7), operatively connected to a hanclle(2), connect rod(3), contact support lever(5), tripping lever(lO) and moving contact sub-assembly (8).
  • the handle assembly is movable between a normal and abnormal or fault position (indicative of the circuit being tripped] and includes the operator or handle (2) and associated handle spring (1).
  • the handle assembly is connected to the contact support lever(5) and tripping lever(lO) by the connect rod (4]
  • the handle spring (1) is configured to bring the handle(2) to the OFF position when the miniature circuit breaker (1) is tripped as illustrated in figures (1) and (2)
  • the 2-lever assembly shown in figure(7) will be controlled by the connect rod(3), and held by holding spring(ll) to join the 2-lever in one rotation path, whenever the miniature circuit breaker at ON position shown in figure(2) the 2-lever assembly will be rotated in a certain angle that will allow the moving contact to be contacting with the magnetic assembly to make the current passing though, Under abnormal /fault condition, magnetic will release the tripping lever by pushing the backwall of the tripping lever [10.8] as a result, the trip lever is configured to transform the linear force that coming from magnetic assembly to rotary force to open the mechanism, when the opening mechanism is activated, the finger like profile (10.1) in the tripping lever pushing the connect rod [3] quickly to release the mechanism and trip the breaker, the contact support lever (5) rotates counterclockwise along with the moving contact sub-assembly (8)
  • the contact support lever (5] includes an opening spring [4] that will be assembled at surface of the contact support (5.5) toward the back-side as illustrated in figure(8)
  • the opening spring (4) along with the 2-lever mechanism, stores the energy while in ON-OFF condition & during the fault condition, facilitates separation of the contacts by providing the required opening velocity for rotating the moving contact sub-assembly (8) during TRIP operation.
  • a test button (15) is coupled with the 2-lever mechanism to achieve a unique functionality of "trip-verification" This function is useful to verify the healthiness of the tripping mechanism. Such verification can be used during the routine testing as well as during installations/maintenance.
  • the access of the test button is such that it is very easy to test the healthiness of the tripping mechanism even when the MCB is stacked in the electric distribution panel.
  • a short circuit trip indication (13)&(14) where both assembled in base(7) to provide dear identification about the fault condition. It becomes very tricky for a skilled person to identify if the MCB was tripped or it was switched off. To distinguish this condition, a short-circuit trip indication (13) & (14) is added in the improved 2-lever mechanism.
  • a signal will be sent from the thermal sub-assembly (8) to tripping lever (10.5), through the thermal slider rod (12), the trip lever is configured to transform the linear force that is coming from the thermal slider rod(12) to a rotary force acting on thermal slider slot (10.5), the thermal element(13) will rotate clockwise direction and forcibly pushing the thermal slider, the thermal slider will transform the rotary force coming from the thermal element(13) to a linear force as a result the tripping lever will move Counterclockwise to open the mechanism, when the opening mechanism is activated, as we explained previously, finger like feature (10.1) pushing the connect rod (3) to release the mechanism and trip the breaker. Having such metal thermal slider/rod will have robust calibration as well as less possibility of melting of the plastic coming in contact with heater element
  • an Auxiliaries -coupling can be connected through tripping lever Auxiliaries slot (10.3) as it’s shown in figure (5) as well as multipole-coupling which also can be connected through multipole slot (10.7) as it is shown in figure(6).

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

L'invention concerne un mécanisme d'actionnement amélioré et simplifié d'un disjoncteur miniature présentant uniquement un ensemble à deux leviers. Le mécanisme à deux leviers permet à des positions MARCHE-ARRÊT du mécanisme qui est la fonction principale de déterminer et de commander le disjoncteur dans un état fermé (MARCHE) ou ouvert (ARRÊT) présentant une caractéristique sans déclenchement.
PCT/SA2021/050014 2021-09-07 2021-09-07 Mécanisme à deux leviers multifonction amélioré et simplifié, et disjoncteur miniature amélioré WO2023038556A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/SA2021/050014 WO2023038556A1 (fr) 2021-09-07 2021-09-07 Mécanisme à deux leviers multifonction amélioré et simplifié, et disjoncteur miniature amélioré
CN202180102170.9A CN117916842A (zh) 2021-09-07 2021-09-07 改进和简化的多功能二杆机构以及改进微型断路器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SA2021/050014 WO2023038556A1 (fr) 2021-09-07 2021-09-07 Mécanisme à deux leviers multifonction amélioré et simplifié, et disjoncteur miniature amélioré

Publications (1)

Publication Number Publication Date
WO2023038556A1 true WO2023038556A1 (fr) 2023-03-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SA2021/050014 WO2023038556A1 (fr) 2021-09-07 2021-09-07 Mécanisme à deux leviers multifonction amélioré et simplifié, et disjoncteur miniature amélioré

Country Status (2)

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CN (1) CN117916842A (fr)
WO (1) WO2023038556A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916691A2 (fr) * 2006-10-23 2008-04-30 Gewiss S.P.A. Réinitialisation automatique et dispositif de test automatique spécialement pour disjoncteurs fonctionnant au courant résiduel et similaire
EP2061061A1 (fr) * 2006-08-17 2009-05-20 Zhejiang Zhiming Electric Imp. & Exp. Co., Ltd. Disjoncteur de fuite à la terre
US20090256660A1 (en) * 2008-04-15 2009-10-15 Triplicane Gopikrishnan Babu Readiness for closing indicator for circuit breakers
CN205211679U (zh) * 2015-12-23 2016-05-04 温州东极电气有限公司 一种断路器的操作机构
WO2018212687A1 (fr) * 2017-05-15 2018-11-22 Alfanar Comapny Dispositif de déclenchement instantané pour disjoncteur miniature et disjoncteur miniature le comprenant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2061061A1 (fr) * 2006-08-17 2009-05-20 Zhejiang Zhiming Electric Imp. & Exp. Co., Ltd. Disjoncteur de fuite à la terre
EP1916691A2 (fr) * 2006-10-23 2008-04-30 Gewiss S.P.A. Réinitialisation automatique et dispositif de test automatique spécialement pour disjoncteurs fonctionnant au courant résiduel et similaire
US20090256660A1 (en) * 2008-04-15 2009-10-15 Triplicane Gopikrishnan Babu Readiness for closing indicator for circuit breakers
CN205211679U (zh) * 2015-12-23 2016-05-04 温州东极电气有限公司 一种断路器的操作机构
WO2018212687A1 (fr) * 2017-05-15 2018-11-22 Alfanar Comapny Dispositif de déclenchement instantané pour disjoncteur miniature et disjoncteur miniature le comprenant

Also Published As

Publication number Publication date
CN117916842A (zh) 2024-04-19

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