EP2223321A1 - Commutateur automatique électrique - Google Patents

Commutateur automatique électrique

Info

Publication number
EP2223321A1
EP2223321A1 EP08863905A EP08863905A EP2223321A1 EP 2223321 A1 EP2223321 A1 EP 2223321A1 EP 08863905 A EP08863905 A EP 08863905A EP 08863905 A EP08863905 A EP 08863905A EP 2223321 A1 EP2223321 A1 EP 2223321A1
Authority
EP
European Patent Office
Prior art keywords
switch
contact
support
bridge
intended
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.)
Granted
Application number
EP08863905A
Other languages
German (de)
English (en)
Other versions
EP2223321B1 (fr
Inventor
Jozef Smrkolj
Stane Vidmar
Borut Drnovsek
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.)
ETI Elektroelement dd
Original Assignee
ETI Elektroelement dd
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 SI200700340A external-priority patent/SI22697B/sl
Priority claimed from SI200800246A external-priority patent/SI22899B/en
Application filed by ETI Elektroelement dd filed Critical ETI Elektroelement dd
Priority to SI200831502T priority Critical patent/SI2223321T1/sl
Publication of EP2223321A1 publication Critical patent/EP2223321A1/fr
Application granted granted Critical
Publication of EP2223321B1 publication Critical patent/EP2223321B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • 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
    • H01H71/1081—Modifications for selective or back-up protection; Correlation between feeder and branch 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • 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

Definitions

  • the subject of the present invention is a low-loss electric automatic switch intended for the protection of electrical installations.
  • the invention more specifically concerns a contact assembly.
  • the switch with a contact assembly of the invention is preferably intended as a switch corresponding to size 1 according to DIN 43880 and has a module width 18 mm and more and it has low own power loss and assures selectivity.
  • the technical problem solved by the invention is how to conceive such contact assembly in an automatic switch of this type that will provide for circuit interruption within prescribed time upon prescribed over-current or rather upon prescribed short-circuit current and that at prescribed number of repeats of such interruptions, whereby the structure of the contact assembly should also be adequate for large-series production or even mass production in compliance with all standards, on the basis of which such product may appear on the market and that for a market acceptable price.
  • the Slovene patent application P-2005 0 0358 discloses an electric automatic switch comprising a contact assembly.
  • This contact assembly is actuated by a striker pin comprised within a coil.
  • the striker pin hits toward the switch assembly and opens the main contact by preserving the contact of the secondary circuit closed.
  • a bimetal linked in series in the secondary circuit in the switch switches off the switch of the secondary circuit.
  • the velocity of contact switch-off in the switch assembly is very high in short-circuit current.
  • said switch reacts also when a short-cuircuit current occurs as a continuation of an over- current or independently due to defects in a protected circuit. All switch-off times of the protected circuit with said switch are standardised as to values of nominal current, over-current and short-circuit current, whereas the minimum number of perfect switches-off at prescribed various values is required.
  • a movable contact element is arranged between fixed contact elements with at least one spring. Due to potent butts of forces appearing during the operation of the electro-magnetic assembly, especially in case of short-circuit current, irregular interrupting of contacts appears, since a spring or springs cannot provide for the positioning of the movable contact element in this situation as foreseen or expected. Tests could not prove a sufficient number of repeats of switch-offs in case of over-current of the first contact only without the second contact opening simultaneously at least for a short moment.
  • the second contact opens in case of over-current, the principle of operation of the electric switch breaks down and unacceptable disturbances appear, namely an electric arc between the contact elements of the second contact, which is not adapted to extinguish the electric arc due to spacial limitations of the switch then the fact that due to irregular opening of the second contact the regular/planned operation of the entire electric switch breaks down.
  • the second contact makes it sure that upon the switch-off of the first contact a resistance and a bimetal are included in the circuit functioning as selectors.
  • the switch-off of the second contact must occur exclusively due to the bending of the bimetal after over-current with a prescribed value and period has occured and/or manual switch-off of the on/off button.
  • the first contact in which the appearance of an electric arc is to be expected upon opening is equipped with an extinguishing chamber.
  • the movable contact element is attached to the electrically unconductive element by a spring pressing it against the fixed contact elements of the second contact.
  • the second contact always remains closed due to a brisk butt of the striker pin on the movable contact element due to the action of the spring pushing the movable contact against the fixed contact elements of the second contact in direction of the butt of the striker pin.
  • the butt of the Strieker pin follows the direction of the force of the spring pushing the movable contact element against two fixed contact elements of the second contact, wherein the force of push of the movable contact element is direct proportional to the force of the butt of the striker pin thereon and thus to the over-current value size.
  • the opening of the second contact is prevented regardless of any opening of the first contact.
  • a further characteristic of the invention lies in the fact that upon appearance of short-circuit current when the striker pin opens the first and closely afterwards the second contact within a veiy short time period, both contact spots of the second contact get successively opened in order to prevent the appearance of the arc on the second contact, which justifies the structure of the second contact without an extinguishing chamber.
  • Fig. 1 shows a wiring diagramme of the switch of the invention
  • Fig. 2 shows a perspective and exploded view of a schematically shown switching assembly with a coil
  • Fig. 3 shows a schematic view of the switch of the invention in normal mode of a protected circuit
  • Fig. 4 shows a view of the switch of the invention in the mode of switch-off of the primary circuit in the switch upon appearance of over-current in the protected circuit
  • Fig. 5 shows a schematic view of the switch of the invention in the mode of complete switch-off of the protected circuit when over-current appears in the protected circuit for a longer time than allowed, or upon the appearance of short-circuit current in the protected circuit.
  • the electric automatic switch consists of a housing I 5 preferably any housing, meeting the standard and intended to be arranged on a busbar that is not shown on figures.
  • connection terminal 2 for a supply connection of the protected circuit not shown in figures together with electric devices included within this circuit.
  • connection terminal 3 preferably identical to the terminal 2 intended for discharge connection of the same protected circuit.
  • connection terminal 2 is linked via current conductor 8 with a fixed contact element 9 of the contact 5.
  • the second fixed contact element 10 of same contact 5 is connected via bus 11 to a resistance 12 and successively to a bimetal 13, which upon increased current flowing through therethrough triggers the electrically unconductive element 7 to pivot, wherein the movable contact element 6 is removable from both fixed contact elements 9 and 10 of the contact 5, which will be described in more detail in the continuation.
  • the bimetal 13 is further connected to the fixed contact element 16 of the contact 4.
  • the movable contact element 6 comprises a contact element 15 engaging with the fixed contact element 16, which is electrically connected with the coil 17 and the latter with the terminal 3.
  • the contact element 15, which is part of the movable contact element 6, and the fixed contact element 16 mutually form the contact 4. So there are two current branches between the terminals 2 and 3, i.e. a first branch via the contact 4 and the coil 17 and another branch via the contact 5, the resistance 12 and the bimetal 13 in parallel to each other.
  • the coil 17 houses a striker pin 18 that acts when over-current in the protected circuit appears, i.e. in the branch between the terminals 2 and 3 via the contact 4, by briskly pivoting the movable contact element 6 in a way to interrupt the contact 4 and yet to keep the contact 5 closed.
  • the entire electric current of the secured circuit is re-directed to the parallel branch from the terminal 2 via the contact 5, the resistor 12 and the bimetal 13 to the terminal 3.
  • a spring 17a preferably situated within the coil 17, returns the striker pin 18 to initial position.
  • the core 17b of said coil 17 further houses an element 17c, preferably a short-circuit ring of a non-magnetic material that assures permanent magnetic field at alternate current.
  • a circuit conductor 8 originating in the terminal 2 is formed at the opposite end as a convex fixed contact element 9 leaning against a support 19 that is preferably a constituent part of the housing 1.
  • the second fixed contact element 10 of the same terminal 5 is formed identically with the contact element 9 and leans against the same or reasonably similar support 19 co-axially with the contact element 9.
  • the electrically unconductive element 7 is rotatingly pivoted within the housing 1 by a bearing 20.
  • the element 7 is further linked to the housing 1 via a spring 21 holding the element 7 upon normal operation of the protected circuit together with the bimetal and a knob 29 in such position that the movable contact element arranged thereon is in simultaneous electric contact with the fixed contacts 9, 10 and 16.
  • a pivotable three-member element 32 In each mode of the switch as a whole the proper position of the electrically unconductive element 7 is determined by a pivotable three-member element 32.
  • One member 32a is intended to engage with the support 33 on the housing 1
  • a second member 32b engages with the bimetal 13
  • a third member 32c comprises a notch 32d, with which engages the Iever31 of the knob 29.
  • the member 32c rotates in a way to discharge the engagement of the lever 31 and the spring 21 can thus rotate the electrically unconductive element 7 in a way to cause both terminals 4 and 5 to open.
  • the notch 32d is formed in a self-locking way. If the three-member element 32 is not rotated in any way as described above, the engagement of the lever 31 with the notch 32b is not openable. A person may thus use the knob 29 to manually open both contacts 4 and 5 any time, thus completely separating the protected circuit from the mains network.
  • the movable contact element 6 is formed in the shape of a cross.
  • the upper extremity 26, as described above, serves to properly position the element 6 in each of its positions.
  • Cross members 30 of the element 6 are intended as complementary contact elements to fixed contact elements 9 and 10, wherein said contact elements form the contact 5.
  • the lower longest member 15 of the movable contact element 6 is intended as a complementary contact element to the fixed contact 16, which together form the contact 6.
  • an extinghishing chamber 31 intended for the neutralisation of electric arc upon the opening of the contact 4.
  • the slantingness of the contact surface 25a is provided with respect to the imaginary common surface of contact elements 9 and 10.
  • the slanted surface 25a is foreseen for the extremity 26 of the element 6 during the rotation of the element 7 (regardless of the cause of rotation: manual by the knob 29 or due to over-current causing bending of the bimetal 13) and during the rotation of the contact element 6 around fixed contact elements 9 and 10 to lean against the slanted surface 25a, wherein the spring 23 co-operates in a way that due to the slantingness of the surface 25a, successive opening appears, namely first of the fixed contact element 10 and the belonging member 30 of the element 6 and then of the fixed contact element 9 and of the second or belonging member 30 of the element 6.
  • the successiveness of opening ensures the absence of arc upon opening of these contact elements and thus the redundancy of an extinguishing chamber.
  • the switch of the invention functions as follows: the current of the protected circuit flows from the terminal 2 via closed contact 5 through the contact element 6, via closed contact 4 to the coil 17 and to the terminal 3. From the contact element 10 of the contact 5 the current also flows through the resistance 12 and the bimetal 13 to the terminal 3. Since the resistance 12 determines a considerably higher resistance of the branch of the contact 10 via bimetal 13 to the terminal 3 than that of the branch determined by the contact 4 and the coil 17, a relatively considerably higher current flows through said second branch.
  • the spring 21 can now freely turn the element 7 in order to open both contacts 4 and 5.
  • the protected circuit is totally interrupted.
  • the circuit can be closed anew only by the manual knob 29, with which an authorised person after a defect in the protected circuit was done away with, returns the element 7 to normal position, i.e. the element closes the contacts 4 and 5.
  • the switch of the invention is manufactured by known technological procedures. Since the switch of this type is subject to standards, adequate materials need to be used for individual elements in order to resist the prescribed mechanical and electric loads. A special attention is to be paid to the electrically unconductive element and to the contact element arranged thereon. The time interval after which the switch totally switches the protected circuit off is determined by the construction of the bimetal 13.

Landscapes

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

Abstract

L'invention porte sur un commutateur automatique électrique constitué d'un boîtier (1), dans lequel à une extrémité du boîtier (1) se trouve une borne de connexion (2) pour une connexion d'alimentation du circuit protégé et à l'extrémité opposée se trouve une borne de connexion (3) destinée à décharger la connexion du circuit protégé, un premier commutateur (4) étant prévu dans le boîtier (1) qui est électriquement connecté à une bobine (17) et à une borne (3), et un second commutateur (5), dans lequel un contact mobile (6) est commun pour lesdits deux commutateurs (4) et (5) et un contact (10) sur le côté de mise hors tension du commutateur (5) est connecté en série à une résistance (12) et également à des moyens (13), de préférence bimétallique, les moyens (13) étant connectés à la première borne de la bobine (17) comprenant un percuteur (18) qui ouvre le commutateur (4) selon l'aspect de la surintensité dans la bobine (17). Dans la zone des commutateurs (4) et (5) se trouve un support (7) du pont de contact (6), ledit support étant pivoté en rotation dans un palier (20) et simultanément ouvert vers un ressort (21) poussant le support (7) vers le commutateur (5) et sur le support (7), se trouve un dispositif de retenue (22) du pont à contact mobile (6), davantage dans son voisinage un support (25), sur lequel l'extrémité supérieure (26) du pont (6) s'appuie avec une force exercée par un ressort (23), un palier (27) pour la partie de déflexion des moyens (13) et un dispositif de préhension (28) du bouton (29) pour une mise sous tension/hors tension manuelle du commutateur, caractérisé par le fait que le pont à contact mobile (6) est formé sous la forme d'une croix, dont l'élément supérieur (30) est destiné à positionner correctement le pont (6) dans chaque mode de fonctionnement du commutateur et ses éléments croisés (30) sont destinés en tant que contacts complémentaires à des éléments de contact fixes (9) et (10) et au commutateur (5), et l'élément le plus long
EP08863905.9A 2007-12-24 2008-12-17 Commutateur automatique électrique Active EP2223321B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200831502T SI2223321T1 (sl) 2007-12-24 2008-12-17 Električno avtomatsko stikalo

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SI200700340A SI22697B (sl) 2007-12-24 2007-12-24 Električno avtomatsko stikalo
SI200800246A SI22899B (en) 2008-10-21 2008-10-21 Electric automatic switch
PCT/SI2008/000067 WO2009082358A1 (fr) 2007-12-24 2008-12-17 Commutateur automatique électrique

Publications (2)

Publication Number Publication Date
EP2223321A1 true EP2223321A1 (fr) 2010-09-01
EP2223321B1 EP2223321B1 (fr) 2015-07-01

Family

ID=40578377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08863905.9A Active EP2223321B1 (fr) 2007-12-24 2008-12-17 Commutateur automatique électrique

Country Status (3)

Country Link
EP (1) EP2223321B1 (fr)
SI (1) SI2223321T1 (fr)
WO (1) WO2009082358A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3049760A1 (fr) * 2016-04-04 2017-10-06 Hager-Electro Sas Appareil electrique de type disjoncteur

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SI2330611T1 (sl) * 2009-12-04 2012-08-31 Hager Electro S A S Soc Par Actions Simplifiee Selektivni odklopnik
CN204118012U (zh) * 2014-08-27 2015-01-21 浙江正泰电器股份有限公司 断路器的操作机构
KR20210069430A (ko) * 2019-12-03 2021-06-11 현대자동차주식회사 스위치

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10261994A1 (de) * 2002-01-30 2004-02-05 Abb Patent Gmbh Selektivschutzschalter und Verfahren zur selektiven Kurzschlussstromabschaltung
DE10211902A1 (de) * 2002-03-18 2003-10-02 Eti Elektroelement Dd Leitungsschutzschalter mit Fehlerstromabschaltung
JP4090850B2 (ja) * 2002-11-13 2008-05-28 三菱電機株式会社 回路遮断器
WO2006085829A1 (fr) * 2005-02-09 2006-08-17 Eti Elektroelement D.D. Interrupteur electrique automatique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009082358A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3049760A1 (fr) * 2016-04-04 2017-10-06 Hager-Electro Sas Appareil electrique de type disjoncteur
WO2017174901A1 (fr) * 2016-04-04 2017-10-12 Hager-Electro Sas Appareil electrique de type disjoncteur
CN109074995A (zh) * 2016-04-04 2018-12-21 海格电气有限公司 断路器类型的电气装置

Also Published As

Publication number Publication date
EP2223321B1 (fr) 2015-07-01
WO2009082358A1 (fr) 2009-07-02
SI2223321T1 (sl) 2015-10-30

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