EP3358594B1 - Disjoncteur à un seul étage - Google Patents

Disjoncteur à un seul étage Download PDF

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Publication number
EP3358594B1
EP3358594B1 EP18154732.4A EP18154732A EP3358594B1 EP 3358594 B1 EP3358594 B1 EP 3358594B1 EP 18154732 A EP18154732 A EP 18154732A EP 3358594 B1 EP3358594 B1 EP 3358594B1
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EP
European Patent Office
Prior art keywords
contact
assembly
circuit breaker
circuit board
stage circuit
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.)
Active
Application number
EP18154732.4A
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German (de)
English (en)
Other versions
EP3358594A1 (fr
Inventor
Chang Chun Hu
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP3358594A1 publication Critical patent/EP3358594A1/fr
Application granted granted Critical
Publication of EP3358594B1 publication Critical patent/EP3358594B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • 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
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms
    • 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
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
    • 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
    • H01H9/50—Means for detecting the presence of an arc or discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H2083/201—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other abnormal electrical condition being an arc fault

Definitions

  • the present invention relates to a low-voltage circuit breaker, and in particular to a single-stage circuit breaker.
  • An arc fault detection circuit breaker referred to as AFDD (arc fault detection device) for short, is also an electric line protection device, and the main function thereof is to detect and identify a dangerous grounding arc fault, a parallel arc fault and a series arc fault, and to drive an action of a device for disconnecting the current in a timely manner, so as to prevent the occurrence of electrical fire.
  • AFDD arc fault detection device
  • the advantages of small size and strong function are achieved, and a leakage current protection function is integrated, so that automatic monitoring and protection of fault arc and leakage current are achieved, effectively guaranteeing the safety of low-voltage power distribution lines and electrical equipment as well as people.
  • a PCBA board may be damaged when an over-voltage of the AFDD circuit breaker is greater than 400 v (e.g., in a 500 VDC insulation resistance test).
  • one end of the PCBA board is directly connected to a left-side terminal so that the PCBA board is always in an energized state, regardless of whether a main loop of the circuit breaker is in a switched-on or switched-off state.
  • An object of the present invention is to provide a single-stage circuit breaker, which can make a circuit board assembly obtain a relatively safe electrical isolation so as to effectively improve the safety and reliability of the entire circuit breaker.
  • the present invention provides a single-stage circuit breaker according to claim 1.
  • the circuit board assembly comprises a first circuit board and a second circuit board, wherein the first circuit board is accommodated in the first accommodation chamber, and the second circuit board is accommodated in the second accommodation chamber.
  • one end of the auxiliary contact assembly is electrically connected to the second circuit board, and the other end of the auxiliary contact assembly can be disconnected from or connected to the second contact assembly, so as to make the circuit board assembly obtain a safe electrical isolation.
  • the auxiliary contact assembly comprises a first contact member, with one end thereof being capable of being bent and deformed under a contact pressure of a movable contact in the second contact assembly and forming a reset force; and a second contact member, with one end thereof being electrically connected to the first contact member and the other end thereof being electrically connected to the second circuit board.
  • the movable contact comprises a first arc-shaped contact end portion and a second long strip-shaped contact end portion, wherein the second contact end portion also has a predetermined bending angle, so that the loop current can be switched off or on more safely and reliably, so as to prevent the generation of a poor arc.
  • one end of the first contact member has a bent contact matching portion for engaging with the first contact end portion in a matching manner, in order to enhance the stability of connection and disconnection of the circuit.
  • an N-pole main switch for controlling an N-pole main loop can be formed between a stationary contact and the movable contact in the second contact assembly, and an auxiliary switch for controlling a loop of the circuit board assembly can be formed between the first contact member and the movable contact.
  • the N-pole main switch when the single-stage circuit breaker is switched from an ON state to an OFF state, the N-pole main switch is switched off first, and then the auxiliary switch is switched off; and when the single-stage circuit breaker is switched from the OFF state to the ON state, the auxiliary switch is switched on first, and then the N-pole main switch is switched on, in order to protect the auxiliary contact from being damaged due to large arc ablation, thereby improving the electrical safety.
  • the first contact member is made of an elastic metal wire and the second contact member is made of a conductive wire, and one of end portions of the second contact member is welded or crimped to the first contact member, in order to enhance the stability of an electrical contact between the movable contact and the first contact member.
  • the contact matching portion is substantially U-shaped to further ensure the reliability of the electrical contact.
  • a single-stage circuit breaker has a shell, the shell further comprising a first housing, a second housing, and a mounting housing located between the first housing and the second housing.
  • a first accommodation chamber is formed between the first housing and the mounting housing, and a second accommodation chamber is formed between the second housing and the mounting housing.
  • a first current path is formed in the first accommodation chamber.
  • a second current path is formed in the second accommodation chamber.
  • the single-stage circuit breaker further comprises an electromagnetic trip device 13, a first contact assembly 16, a first execution assembly 11, an arc fault and leakage trip device 23, a second contact assembly 26, a second execution assembly 21, a circuit board assembly 18, and an auxiliary contact assembly 50.
  • the first execution assembly 11 and the second execution assembly 21 move simultaneously with an operating handle 32 via a common driving member 31.
  • the single-stage circuit breaker of the present application also has an arc extinguishing device 15, wherein the arc extinguishing device 15 is accommodated between the electromagnetic protection device 13 and the first contact assembly 16.
  • the single-stage circuit breaker of the present application also has a thermal protection and arc fault detection device 17, wherein the thermal protection and arc fault detection device 17 is arranged near the arc extinguishing device 15 and located in the first accommodation chamber.
  • the single-stage circuit breaker further comprises a multi-function button module 12 arranged at a side portion of the shell for state displaying and function testing of the single-stage circuit breaker.
  • the first contact assembly 16 and the first execution assembly 11 are used for cooperating with the electromagnetic trip device 13 and located in the first accommodation chamber.
  • the arc fault and leakage trip device 23 is arranged in the second accommodation chamber.
  • the second contact assembly 26 and the second execution assembly 21 are used for cooperating with the arc fault and leakage trip device 23 and located in the second accommodation chamber.
  • the circuit board assembly 18 is used for arc fault handling and leakage protection.
  • the auxiliary contact assembly 50 is arranged inside the second accommodation chamber for effecting safe electrical isolation of the circuit board assembly.
  • the circuit board assembly 18 comprises a first circuit board 181 and a second circuit board 182, wherein the first circuit board 181 is accommodated in the first accommodation chamber, and the second circuit board 182 is accommodated in the second accommodation chamber.
  • the first circuit board 181 and the second circuit board 182 are arranged in parallel to each other by means of a pin connection and at least partially overlap in a vertical direction.
  • the first circuit board 181 and the second circuit board 182 may be connected together via a flexible board.
  • the first circuit board 181 and the second circuit board 182 may be integrated as a whole.
  • the first execution assembly 11 and the second execution assembly 21 can be respectively actuated by the action of the handle 32, and then the first contact assembly 16 and the second contact assembly 26 are respectively actuated.
  • an L-pole main switch K1 formed between a movable contact and a stationary contact in the first contact assembly 16 serves to control the connection and disconnection of an L-pole main loop.
  • An N-pole main switch K2 formed between a stationary contact 28 and a movable contact 27 in the second contact assembly 26 serves to control the connection and disconnection of an N-pole main loop.
  • auxiliary contact assembly 50 is electrically connected to the second circuit board 182, and the other end of the auxiliary contact assembly 50 can be disconnected from or connected to the second contact assembly 26.
  • the presence of the auxiliary contact assembly 50 is equivalent to the addition of an auxiliary switch K3 between the circuit board assembly 18 and a right-side wiring terminal. This allows a current loop on the board assembly 18 to be independent of the L-pole main loop and the N-pole main loop, respectively.
  • the circuit breaker is in an ON state
  • the L-pole main switch K1 and the N-pole main switch K2 are in a switched-on state
  • the auxiliary switch K3 is also in a switched-on state, and the circuit breaker works normally.
  • the circuit board assembly 18 when the circuit breaker is in an OFF state, the L-pole main switch K1 and the N-pole main switch K2 are in a switched-off state, and the auxiliary switch K3 is also in a switched-off state, so that the circuit board assembly 18 is electrically isolated dually. Therefore, by controlling the switching on/off of the auxiliary switch K3, the circuit board assembly 18 can be safely electrically isolated and the circuit board assembly 18 can be effectively prevented from being always in an energized state, so as to effectively reduce the risk of damaging the circuit board assembly 18 by over-voltage breakdown, thereby improving the safety and reliability of the entire circuit breaker.
  • the auxiliary contact assembly 50 comprises a first contact member 51 and a second contact member 52.
  • One end of the first contact member 51 can be bent and deformed under a contact pressure of the movable contact 27 in the second contact assembly 26 and form a reset force.
  • One end of the second contact member 52 is electrically connected to the first contact member 51, and the other end of the second contact member 52 is electrically connected to the second circuit board 182.
  • an N-pole main switch K2 for controlling an N-pole main loop can be formed between a stationary contact 28 and the movable contact 27 in the second contact assembly 26, and an auxiliary switch K3 for controlling a loop of the circuit board assembly 18 can be formed between the first contact member 51 and the movable contact 27.
  • the N-pole main switch K2 is switched off first, and then the auxiliary switch K3 is switched off.
  • the auxiliary switch K3 is switched on first, and then the N-pole main switch K2 is switched on, thereby improving the electrical safety.
  • the movable contact 27 comprises a first contact end portion 271 and a second contact end portion 272.
  • the first contact end portion 271 is in the shape of a circular arc with a gentle transition.
  • the second contact end portion 272 is in the shape of a long strip, and the second contact end portion 272 also has a predetermined bending angle.
  • the above-mentioned design can make the second contact end portion 272 of the movable contact 27 better match the stationary contact 28, so that the main loop current can be switched off or on safely and reliably to minimize the generation of arcs as much as possible.
  • the contact matching portion 511 is bent for engaging with the first contact end portion 271 in a matching manner.
  • a contact surface of the first contact end portion 271 is of a circular arc shape, it is possible to facilitate steady and smooth sliding of the contact matching portion 511 on the first contact end portion 271 to ensure a more stable electrical contact therebetween, so that the loop current can be switched off or on stably and reliably, so as to prevent the generation of a poor arc.
  • the contact matching portion 511 is substantially U-shaped, and the above-mentioned design can ensure that the contact matching portion 511 has a sufficiently large contact area and contact pressure to make same better come into electrical contact with the first contact end portion 271.
  • the N-pole structure of the circuit breaker is shown.
  • the N-pole structure may be accessed from a left-side terminal 29 shown in Fig. 5 (for example, the terminals 2 and 4 in Fig. 4 serve as the left-side terminal).
  • the stationary contact 28 and the movable contact 27 in the second contact assembly 26 are turned off, the auxiliary switch K3 and the N-pole main switch K2 are both in a switched-on state, and the loop current for the circuit board assembly passes through the left-side terminal 29, the stationary contact 28, the movable contact 27, the first contact member 51, the second contact member 52, and the second circuit board 182 successively.
  • the structure may also be accessed selectively from a right-side terminal 24 (for example, the terminals 1 and 3 in Fig. 4 serve as the right-side terminal).
  • the loop current for the circuit board assembly passes through the right-side terminal 24, the conductive wire, the movable contact 27, the first contact member 51, the second contact member 52 and the second circuit board 182 successively.
  • the first contact member 51 is made of an elastic metal wire. Since the elastic metal wire has an elastic reset force, the first contact member 51 can be bent and deformed after being subjected to a contact force from the movable contact 27, so as to reserve enough elastic force to ensure the stability of an electrical contact between the movable contact 27 and the first contact member 51 when the auxiliary switch K3 is in a switched-on state.
  • the second contact member 52 is made of a conductive wire, and one of end portions of the second contact member 52 is welded or crimped to the first contact member 51.
  • the L-pole main switch K1 When the operating handle 32 of the single-stage circuit breaker starts to operate and the circuit breaker is switched from an ON state to an OFF state, the L-pole main switch K1 is switched off before the N-pole main switch K2 is switched off, the L-pole main switch K1 generates a large number of arcs while being switched off, and these arcs are extinguished gradually under the action of the arc extinguishing device 15, so that the arcs have gradually decreased or are even almost completely extinguished when the N-pole main switch K2 is switched off.
  • the N-pole main switch K2 is switched off slightly earlier than the auxiliary switch K3, and at the same time, the residual arcs are then divided into two paths, thereby further facilitating the quick extinction of the arcs, and further effectively reducing the risk of contact damage due to arc ablation. Therefore, it is not necessary to select and use special contact materials and structural designs for the auxiliary contact assembly, for example, it is not necessary to use a special plating layer, tungsten or carbon material, which greatly reduces the production cost. In this case, no current flows through the circuit board assembly, and the current loop of the circuit board assembly is switched off.
  • circuit board assembly Since the circuit board assembly is always in a safe voltage range, the possibility of over-voltage breakdown is prevented and the service life of the circuit board assembly is further prolonged. Since the design of the present application can enable the circuit board components to be at a relatively safe voltage level, there is no need to use a circuit board with specific specifications to meet the reliability of the product thereof, and a commonly configured circuit board assembly can be used to meet safety performance requirements and thus greatly reduces the cost of the entire product. It is to be noted that the above-mentioned design of the present application can be applied to a variety of compact circuit breakers and therefore has a wide range of applicability.

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

Claims (10)

  1. Disjoncteur à un seul étage, comprenant
    une première chambre de réception dans laquelle est formé un premier trajet de courant ;
    une seconde chambre de réception dans laquelle est formé un second trajet de courant ;
    un dispositif de déclenchement électromagnétique (13) disposé dans la première chambre de réception ;
    un premier ensemble de contact (16) et un premier ensemble d'exécution (11) utilisés pour coopérer avec le dispositif de déclenchement électromagnétique (13) et situés dans la première chambre de réception ;
    un dispositif de déclenchement en cas de défaut d'arc et de fuite (23) disposé dans la seconde chambre de réception ;
    un second ensemble de contact (26) et un second ensemble d'exécution (21) utilisés pour coopérer avec le dispositif de déclenchement en cas de défaut d'arc et de fuite (23) et situés dans la seconde chambre de réception ;
    dans lequel le premier ensemble d'exécution (11), le second ensemble d'exécution (21), le premier ensemble de contact (16) et le second ensemble de contact (26) peuvent être actionnés respectivement par l'actionnement d'un manche (32), pour commuter le disjoncteur dans un état enclenché ou dans un état désenclenché ;
    un ensemble de carte de circuit (18) pour la prise en charge des défauts d'arc et la protection contre les fuites ; et
    un ensemble de contacts auxiliaire (50) disposé à l'intérieur de la seconde chambre de réception pour réaliser une isolation électrique sûre de l'ensemble de carte de circuit.
  2. Disjoncteur à un seul étage selon la revendication 1, dans lequel l'ensemble de carte de circuit (18) comprend une première carte de circuit (181) et une seconde carte de circuit (182),
    dans lequel la première carte de circuit (181) est reçue dans la première chambre de réception, et la seconde carte de circuit (182) est reçue dans la seconde chambre de réception.
  3. Disjoncteur à un seul étage selon la revendication 2, dans lequel une extrémité de l'ensemble de contact auxiliaire (50) est connectée électriquement à la seconde carte de circuit (182), et l'autre extrémité de l'ensemble de contacts auxiliaire (50) peut être déconnectée du second ensemble de contact (26) ou connectée à celui-ci.
  4. Disjoncteur à un seul étage selon la revendication 1, dans lequel l'ensemble de contacts auxiliaire (50) comprend
    un premier élément de contact (51), dont une extrémité peut être fléchie et déformée sous une pression de contact d'un contact mobile (27) dans le second ensemble de contact (26) et formant une force de rappel ; et
    un second élément de contact (52), dont une extrémité est connectée électriquement au premier élément de contact (51) et l'autre extrémité est connectée électriquement à la seconde carte de circuit (182).
  5. Disjoncteur à un seul étage selon la revendication 4,
    dans lequel le contact mobile (27) comprend une première partie d'extrémité de contact en forme d'arc (271) et une seconde partie d'extrémité de contact en forme de longue bande (272), dans lequel la seconde partie d'extrémité de contact (272) présente également un angle de fléchissement prédéterminé.
  6. Disjoncteur à un seul étage selon la revendication 5, dans lequel une extrémité du premier élément de contact (51) comporte une partie homologue de contact fléchie (511) destinée à s'accoupler avec la première partie d'extrémité de contact (271) de manière homologue.
  7. Disjoncteur à un seul étage selon la revendication 4, dans lequel un commutateur principal à N pôles (K2) pour commander une boucle principale à N pôles peut être formé entre un contact fixe (28) et le contact mobile (27) dans le second ensemble de contact (26), et un commutateur auxiliaire (K3) pour commander une boucle de l'ensemble de carte de circuit (18) peut être formé entre le premier élément de contact (51) et le contact mobile (27) .
  8. Disjoncteur à un seul étage selon la revendication 7, dans lequel quand le disjoncteur à un seul étage est commuté d'un état enclenché à un état désenclenché, le commutateur principal à N pôles (K2) est désactivé en premier, avant le commutateur externe (K3) ; et quand le disjoncteur à un seul étage est commuté de l'état désenclenché à l'état enclenché, le commutateur auxiliaire (K3) est activé en premier, avant le commutateur principal à N pôles (K2).
  9. Disjoncteur à un seul étage selon la revendication 4, dans lequel le premier élément de contact (51) est réalisé dans un fil métallique élastique et le premier élément de contact (52) est réalisé dans un fil conducteur, et une des parties d'extrémité du premier élément de contact (52) est soudée ou sertie sur le premier élément de contact (51).
  10. Disjoncteur à un seul étage selon la revendication 6, dans lequel la partie homologue de contact (511) a sensiblement une forme de U.
EP18154732.4A 2017-02-04 2018-02-01 Disjoncteur à un seul étage Active EP3358594B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710064313.7A CN108400072B (zh) 2017-02-04 2017-02-04 单级断路器

Publications (2)

Publication Number Publication Date
EP3358594A1 EP3358594A1 (fr) 2018-08-08
EP3358594B1 true EP3358594B1 (fr) 2020-04-01

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ID=61132326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18154732.4A Active EP3358594B1 (fr) 2017-02-04 2018-02-01 Disjoncteur à un seul étage

Country Status (2)

Country Link
EP (1) EP3358594B1 (fr)
CN (1) CN108400072B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202019001746U1 (de) 2019-04-17 2019-05-20 Siemens Aktiengesellschaft Kompakt-Schutzschaltgerät
DE102021204530A1 (de) 2021-05-05 2022-11-10 Siemens Aktiengesellschaft Schalter mit Störlichtbogenerkennung
CN114420495B (zh) * 2022-03-29 2022-07-01 深圳市脉联电子有限公司 一种电弧隔离防尘结构及断路器

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Publication number Priority date Publication date Assignee Title
CN201181681Y (zh) * 2008-04-14 2009-01-14 上海益而益电器制造有限公司 脱扣装置和带有这种装置的漏电保护插座
CN101877474A (zh) * 2010-06-04 2010-11-03 中国人民解放军海军海防工程技术管理室 一种智能型电弧故障断路器
US9899160B2 (en) * 2013-08-19 2018-02-20 Siemens Industry, Inc. Low-profile electronic circuit breakers, systems, and methods
US9214309B2 (en) * 2013-09-11 2015-12-15 Siemens Industry, Inc. Two-pole circuit breaker with trip bar apparatus and methods
CN205069532U (zh) * 2015-10-23 2016-03-02 天津天地通自动化设备有限公司 便于安装的断路器

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
CN108400072B (zh) 2020-01-03
EP3358594A1 (fr) 2018-08-08
CN108400072A (zh) 2018-08-14

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