SI9620029A

SI9620029A - Line safety switch

Info

Publication number: SI9620029A
Application number: SI9620029A
Authority: SI
Inventors: Torsten Schlegel; Juergen Feuerhake; Ralf Schwager; Helmut Heindorf
Original assignee: Aeg Niederspannungstechnik Gmbh & Co.Kg
Priority date: 1995-02-03
Filing date: 1996-02-02
Publication date: 1998-02-28
Also published as: DE59609216D1; PL321260A1; ATE217731T1; DE19503530B4; HUP9800194A2; HU221487B; EP0807313B1; WO1996024150A1; EP0807313A1; HUP9800194A3; CZ241897A3; CZ286737B6; PL180036B1; DE19503530A1

Abstract

In the line switch housing (1) with only one normal pole width there are a thermally and magnetically protected external conductor pole (L) and an unprotected neutral conductor pole (N) to each of which is allocated a contact device (3 or 7). Both contact devices (3, 7) have contact levers (3.1 or 7.1) acting on fixed contacts (4.1 or 8.1), which are coupled via a slide (9) and controlled by a manually operable switching mechanism (2). In order in such a switch to retain the switching function and operating mode of the external conductor pole (L) and the same basic spatial arrangement as in an ordinary line safety switch and, in particular, to prevent the neutral conductor contacts (7.3, 8.1) from becoming welded together, both contact devices (3, 7) are fitted in the functional plane of the switching mechanism (2) one above the other with spatially separated bearings (pivots 3.2 or 7.2) for their contact levers (3.1, 7.1). Here, the contact device (7) for the neutral conductor pole (N) is arranged in the housing base (1.1) immediately adjacent the input terminal (8) region and coupled via the slide (9) to the contact lever (3.1) of the external conductor pole (L) partly positively and partly by adherence. At the same time the slide (9) is arranged virtually in the axial extension of the magnetic trigger (4) fitted with a solenoid (4,5) in such a way that, in the event of a short circuit, the solenoid (4,5) striking the contact lever (3.1) via an intermediate member (triggering lever 2.1 or 2.11) also strikes the contact lever (7.1) of the neutral conductor pole (N) in the same direction.

Description

AEG Niederspannungstechnik GmbH & Co.KGAEG Niederspannungstechnik GmbH & Co.KG

Zaščitni odklopnikCircuit breaker

Izum se nanaša na zaščitni odklopnik s tako termično kot magnetno ščitenim polom za priključitev vnanjega vodnika in z nezaščitenim polom za priključitev nevtralnega vodnika po uvodnem delu patentnega zahtevka 1.The invention relates to a circuit breaker with both a thermally and magnetically shielded terminal for connecting an external conductor and an unprotected terminal for connecting a neutral conductor according to the introductory part of claim 1.

Takšen zaščitni odklopnik je poznan iz spisa EP 0 599 800 Al. Pri tem stikalu sta po ena kontaktna priprava pola za priključitev vnanjega vodnika in pola za priključitev nevtralnega vodnika nameščeni znotraj skupnega okrova z običajno polovno širino v vzporednih ravninah druga poleg druge. Obe kontaktni pripravi sta druga od druge ločeni z zakrivljeno notranjo lupino, ki je nameščena v komori za gašenje električnega obloka pri polu za priključitev vnanjega vodnika. Zato je prostor pred pripravo za gašenje električnega obloka vsaj z ene strani znatno stisnjen. Obe kontaktni pripravi sta povezani druga z drugo preko premikalnega droga, ki je voden v notranji lupini in ki po svoji strani nosi pripadajoče stikalne mostičke na koaksialno nameščenih oseh. Pri sproženju stikalnega mehanizma se oba stikalna mostička, ki ju podpira stisnjena vzmet, zasučeta v istem smislu. Stikalna mostička, ki sta v principu neposredno povezana s pomočjo skupne osi, se predvsem pri stikalnih postopkih medsebojno zelo ovirata, tako da je zaščitna funkcija pola za priključitev vnanjega vodnika v celoti pod neugodnim vplivom.Such a circuit breaker is known from EP 0 599 800 Al. With this switch, each contact device for the pole for connecting the outer conductor and the pole for connecting the neutral conductor are located inside a common box with the usual half width in parallel planes side by side. The two contact devices are separated from each other by a curved inner shell, which is housed in an electric arc quenching chamber at the pole to connect the outer conductor. Therefore, the space is significantly compressed at least on one side prior to the preparation for extinguishing the arc. The two contact devices are connected to each other via a movable rod guided in the inner shell, which in turn carries the corresponding switch bridges on coaxially mounted axes. When the switching mechanism is actuated, the two switches, supported by a compressed spring, rotate in the same sense. The contact bridges, which are in principle directly connected by means of a common axis, are particularly interfering with each other in the switching process, so that the protective function of the pole for connecting the external conductor is completely under unfavorable influence.

Naloga izuma je, da se stvori zaščitni odklopnik uvodoma navedene vrste, tako da stikalna funkcija in način delovanja pola za priključitev vnanjega vodnika ostaneta nespremenjeno ohranjeni glede na normalni zaščitni odklopnik, prostorska razme2 stitev stikalnega mehanizma, sprožilnih organov in področja gasilne komore ostane le nebistveno okrnjena in se predvsem zanesljivo prepreči zvaritev tako kontakta vnanjega vodnika kot tudi kontakta nevtralnega vodnika.It is an object of the invention to provide a protective circuit breaker of the above mentioned type so that the switching function and mode of operation of the pole for connecting the external conductor remain unchanged with respect to the normal protective circuit breaker, the spatial arrangement of the switching mechanism, actuators and the area of the firebox remains substantially defective and, above all, the welding of both the external conductor contact and the neutral conductor contact is reliably prevented.

Ta naloga je rešena z zaščitnim odklopnikom z označujočimi značilnostmi patentnega zahtevka 1. Nadaljnji razvoj in prednostni izvedbeni primeri izuma so podani v odvisnih patentnih zahtevkih.This problem is solved by a circuit breaker with the characteristic features of claim 1. Further developments and preferred embodiments of the invention are given in the dependent claims.

Izum ima prednost, da zaščiteni pol za priključitev vnanjega vodnika deluje kot normalni zaščitni odklopnik in je stvorjen pretežno iz nespremenjenih delov takšnega stikala. Pri isti velikosti okrova je v to zgradbo dodatno integriran nezaščiten pol za priključitev nevtralnega vodnika varčno s prostorom in funkcijsko primerno. Hkrati je zagotovljeno, da pri postopku vključitve najprej sklene z lastno kontaktno vzmetjo kontakt nevtralnega vodnika samodejno in šele zatem kontakt vnanjega vodnika. V sklenjenem položaju kontakta nevtralnega vodnika je nadalje povezava preko sile s kontaktno pripravo pola za priključitev vnanjega vodnika popolnoma odpravljena. Njegov kontaktni vzvod se lahko torej končno prosto tako kot pri samem zaščitnem odklopniku zasuče v sklenjeni položaj.The invention has the advantage that a shielded terminal for connecting an external conductor acts as a normal protective circuit breaker and is created predominantly from unaltered parts of such a switch. With the same enclosure size, an unshielded pole is further integrated into this building to connect the neutral conductor with space-saving and functional fit. At the same time, it is ensured that during the start-up process, the contact of the neutral conductor is first concluded with its own contact spring automatically and then afterwards the contact of the external conductor. In the closed contact position of the neutral conductor, the connection through the force with the contact device of the pole for connection of the external conductor is completely eliminated. Its contact lever can then be freely rotated to its closed position, as with the circuit breaker itself.

Pri postopku odklapljanja bodisi zaradi preobremenitve, kratkega stika ali tudi ročno pa se odpre najprej kontakt vnanjega vodnika, pri čemer se njegov kontaktni vzvod najprej premika v smeri magnetnega sistema. Na ta način se v začetku odklopne faze prostostna stopnja med kontaktom vnanjega vodnika in kontaktom nevtralnega vodnika še poveča in kontaktni vzvod pola za priključitev vnanjega vodnika lahko odpre povsem brez vpliva pola za priključitev nevtralnega vodnika. Šele po prepotovanju vnaprej določene poti pri odpiranju kontakta vzpostavi premikalni drog povezavo preko sile s kontaktnim vzvodom pola za priključitev nevtralnega vodnika in ga odpre časovno po polu za priključitev vnanjega vodnika. Pri tem kontaktna vzmet premičnega kontakta nevtralnega vodnika zelo hitro zmanjša nasprotno silo glede na kontaktno vzmet kontakta vnanjega vodnika v neznatnem zaostanku. Ta efekt se doseže s pomočjo kontaktne vzmeti pola nevtralnega vodnika, ki je izoblikovana kot natezna vzmet, in s pomočjo posebno prednostno izbranih točk za njeno pritrditev. Na ta način se lahko natezna vzmet pri postopku odpiranja zasuče skoraj do mesta uležajenja premičnega kontakta nevtralnega vodnika v približno lego mrtve točke, tako da njen navor v smeri sklenitve zelo hitro doseže skoraj vrednost nič. Zato je tudi v razklenjenem položaju pola vnanjega vodnika in pola nevtralnega vodnika medsebojni vpliv zanemarljiv.During the disconnection process, either due to overload, short circuit or also manually, the contact of the external conductor is first opened, with its contact lever first moving in the direction of the magnetic system. In this way, at the beginning of the cut-off phase, the clearance between the external conductor contact and the neutral conductor contact is further increased and the contact lever of the external conductor connection pole can be opened completely without the influence of the neutral conductor connection pole. Only after traveling a predetermined path, when opening the contact, does the movable pole connect through force with the contact lever of the pole to connect the neutral conductor and open it temporarily after the pole to connect the external conductor. In doing so, the contact spring of the neutral contact of the neutral conductor very quickly reduces the counter force relative to the contact spring of the contact of the external conductor in a slight lag. This effect is achieved by means of a contact spring of a neutral conductor shaped like a tensile spring and by means of specially selected points for fixing it. In this way, the tensile spring during the opening procedure can be rotated almost to the point of contact of the neutral contact of the neutral conductor to the approximate position of the dead point, so that its torque in the direction of contraction very quickly reaches almost zero. Therefore, the interaction of the external conductor and the neutral conductor pole is negligible even in the open position.

Glavna prednost razmestitve po izumu pa se pokaže pri postopku odpiranja v primeru kratkega stika. Pri tem se po sprostitvi držalnega stikala udarec magnetnega jedra za pospešeno odpiranje kontakta vnanjega vodnika prenese neposredno na premikalni drog, ki je nameščen v istem smislu, tako da ta s časovno zamaknitvijo prav tako sunkovito deluje na kontakt nevtralnega vodnika v smeri odpiranja. Zvaritev kontakta nevtralnega vodnika se zato podobno kot pri kontaktu vnanjega vodnika zanesljivo prepreči z udarnim delovanjem magnetnega sprožnika.The main advantage of the arrangement according to the invention is, however, shown in the short-circuit opening procedure. In this case, after the release of the holding switch, the impact of the magnetic core to accelerate the opening of the contact of the external conductor is transferred directly to the displacement rod, which is positioned in the same sense, so that with a time delay it also strikingly acts on the contact of the neutral conductor in the opening direction. The welding of the neutral conductor contact is therefore reliably prevented by the magnetic actuator impact, as in the case of the external conductor contact.

Izvedbeni primer izuma je v nadaljnjem podrobneje pojasnjen s pomočjo risbe.An embodiment of the invention is further explained by way of drawing.

Sl. 1 poenostavljeno prikazuje zaščitni odklopnik s polom vnanjega vodnika in polom nevtralnega vodnika v njegovi funkcijski ravnini v izklopljenjem položaju, medtem ko sl. 2 podaja vklopljeni položaj zaščitnega odklopnika v istem načinu predstavitve.FIG. 1 shows, in simplified terms, a circuit breaker with an external conductor pole and a neutral conductor pole in its functional plane in the off position, while FIG. 2 specifies the on-off position of the circuit breaker in the same presentation mode.

Le delno odprto predstavljeni zaščitni odklopnik ima stikalni okrov 1, ki je le nakazan s svojimi vnanjimi obrisi in ki je na poznan način sestavljen iz dveh pollupin in je v ravnini risbe debel le nekako 18 mm, to se pravi, ima kot delitev običajno polovno širino. S svojimi vnanjimi obrisi normiranim meram, ki pripadajo zaščitnim odklopnikom, ustrezajoči okrov stikala sprejme v svoji notranjosti stikalni mehanizem 2, kontaktno pripravo 3 za zaščiteni pol L vnanjega vodnika, magnetni sprožnik 4, stikalno in gasilno komoro 5 kot tudi termični sprožnik 6. Prej navedeni moduli 2 do 6 pri tem v največji meri obstojijo iz obstoječih modulov normalnega enopolnega zaščitnega odklopnika in so tako po svoji razmestitvi kot tudi po svoji funkciji glede na takšno stikalo praktično nespremenjeni. Le v podnožju 1.1 okrova so v prej znanem področju priključnih sponk potrebne znatne spremembe pri notranjih obrisih okrova, da se po eni strani pridobi zadosten prostor za dvojno število sponk - po ena vhodna in izhodna sponka za pol vnanjega vodnika kot tudi pol nevtralnega vodnika - in se dodatno omogoči tudi v področju 1.2 vhodnih sponk namestitev kontaktne priprave 7 za pol N nevtralnega vodnika poleg za to potrebnih mehaničnih in električnih modulov.Only the partially open-circuit breaker has a switch box 1, which is only indicative of its outer contours, and which in a known manner consists of two poles and is only 18 mm thick in the plane of the drawing, that is to say, has a normal full width as a division. . With its external contours to the standard dimensions belonging to the circuit breakers, the corresponding switch housing accepts in its interior a switch mechanism 2, a contact device 3 for the shielded pole L of the external conductor, a magnetic trigger 4, a switch and a fire chamber 5, as well as a thermal trigger. modules 2 to 6 are largely made up of existing modules of a normal single-pole circuit breaker and are practically unchanged in terms of their location and function in relation to such a switch. Only at the base of the 1.1 casing are significant changes to the internal contours of the casing known in the previously known area of terminal blocks to provide sufficient space for double the number of terminals - one input and output terminals for half the outer conductor as well as half for the neutral conductor - and In addition, in the area of 1.2 input terminals, it is possible to install contact device 7 for the half N neutral conductor in addition to the necessary mechanical and electrical modules.

Kot brez nadaljnjega izhaja iz slik risbe, je kontaktna priprava 7, ki zadeva jedro izuma, za pol N nevtralnega vodnika nameščena stransko pod termičnim sprožnikom 6 v podnožju 1.1 okrova v neposredni soseščini pripadajoče vhodne sponke 8. Pri tem kontaktna priprava deluje v isti, vendar nekoliko po višini zamaknjeni ravnini premikanja - ustreza ravnini risbe - kot kontaktna priprava 3 za pol N vnanjega vodnika. Kontaktna priprava 7 obstoji v bistvu iz dvoročičnega kontaktnega vzvoda 7.1, ki je zasučen okoli glede na okrov stalne osi 7.2 in ki na svojem prostem koncu 7.11 vzvoda, ki leži nasproti samemu kontaktnemu mestu 7.3, sodeluje s premikalnim drogom 9, ki ga je treba še podrobneje opisati. Kontaktni vzvod 7.1 deluje pod vplivom svoje kontaktne vzmeti 7.4 na fiksen kontakt 8.1, ki je kot ukrivljen podaljšek povezan neposredno z vhodno sponko 8, ki po svoji strani s pomočjo škatle 8.2 za priključitev in priključnega vijaka 8.3 omogoča priključitev nevtralnega vodnika, ki ni prikazan. Izhajajoč iz kontaktnega voda 7.1, vodi po drugi strani le nakazana, električno dovolj izolirana povezava 7.6 prečno skozi okrov stikala do izhodne sponke pola nevtralnega vodnika, ki ni prikazana in ki je nameščena ležeče nasproti vhodni sponki 8 na zgornji strani.As is further apparent from the drawings, the contact device 7 concerning the core of the invention is positioned laterally below the thermal trigger 6 at the base 1.1 of the housing in the immediate neighborhood of the adjacent input terminal 8. For this, the contact device operates in the same, but slightly displaced displacement plane - corresponding to the drawing plane - as contact device 3 for the half N outer conductor. The contact device 7 consists essentially of a two-handed contact lever 7.1 which is rotated about with respect to the housing of the permanent axis 7.2 and which, at its free end 7.11, lying opposite the contact point 7.3 itself, cooperates with a movable bar 9, which is still to be describe in more detail. Contact lever 7.1 operates under the influence of its contact spring 7.4 on a fixed contact 8.1, which, as a curved extension, is connected directly to the input terminal 8, which in turn, by means of a connection box 8.2 and a connecting screw 8.3, allows the connection of a neutral conductor not shown. Starting from contact line 7.1, on the other hand, only the insulated, electrically insulated enough connection 7.6 crosses through the switch housing to the output terminal of the neutral conductor pole, which is not shown, and which is positioned opposite the input terminal 8 on the upper side.

Nadalje je v ravnini nad vhodno sponko 8 nameščena enako velika vhodna sponka ni prikazana - za pol vnanjega vodnika in je od te ločena s pomočjo vložnega dela 1.3 - nakazan z črtkasto-točkastimi linijami - v podnožju okrova. Od te sponke vodi električna povezava neposredno do baze termičnega sprožnika 6 - shematično je prikazan s pomočjo kratkega kosa gibkega vodnika 6.2 - in je nameščena zadosti izolirana od kontaktne priprave 7. Prav tako vodi od prostega konca 6.3 termičnega sprožnika, ki na način, ki je sam po sebi poznan, ni pa podrobneje predstavljen, povzroči sprožitev stikalnega mehanizma 3 v primeru nadtoka, gibek vodnik 6.4 do zasučnega kontaktnega vzvoda 3,1 kot del kontaktne priprave 3 zaščitenega pola vnanjega vodnika.Further, in the plane above the input terminal 8, an equally large input terminal is not shown - for a half-conductor conductor and separated from it by the insertion part 1.3 - indicated by dotted-dotted lines - at the base of the housing. From this clip, an electrical connection leads directly to the base of the thermal trigger 6 - it is shown schematically by means of a short piece of flexible conductor 6.2 - and is sufficiently insulated from the contact device 7. It also leads from the free end 6.3 of the thermal trigger, which in a manner that is known per se but not presented in detail, triggers switch mechanism 3 in case of overcurrent, flexible conductor 6.4 to rotary contact lever 3.1 as part of contact device 3 of the shielded outer conductor pole.

Kontaktni vzvod 3.1 pola za priključitev vnanjega vodnika je s svojo vzdolžno luknjo zasučno uležajen v osi 3.2, ki je stalna glede na okrov, in hkrati za majhno vrednost stransko premičen, da se poleg vzpostavitve kontaktnega pritiska lahko npr. izravnajo spremembe zaradi odžiga konca 3.3 na kontaktni strani. Na ta način kontaktni vzvod deluje na fiksni kontakt 4.1, kije preko takoimenovanega kontaktnega roga 4.2 vključen v kratkostični stremen 4.3 magnetnega sprožnika 4, ki po svoji strani v obliki okvirja obdaja ovoj 4.4. Od ovoja vodi tokovna pot pola za priključitev vnanjega vodnika neposredno do izhodne sponke - ni prikazana - na zgornji strani okrova stikala. Ovoj 4.4 obdaja magnetno jedro 4.5, ki vsaj v primeru kratkega stika zasuče le delno predstavljeni sprožilni vzvod v smislu nasproti urnemu kazalcu okoli osi 2.2, ki je stalna glede na okrov, in pri tem na način, ki je sam po sebi poznan sproži stikalni mehanizem 2 na njegovem kolenčastem vzvodu 2.3, tako da se kontaktni vzvod 3.1 lahko zasuče iz sklenjenega položaja, ki je prikazan na sl. 2, v razklenjeni položaj po sl. 1. To, v najkrajšem času odvijajoče se gibanje odpiranja kontaktnega vzvoda 3.1 je po eni strani povzročeno s kontaktno vzmetjo 3.4, ki levosučno prijema nad njegovim mestom uležajenja (os 3.2), predvsem pa s sprožnim vzvodom 2.1, ki ga pospeši magnetno jedro 4.5 in ki se po sprožitvi s svojim koncem 2.11 v obliki kladiva sunkovito premakne proti koncu 3.3 kontaktnega vzvoda na kontaktni strani in razpre kontaktno mesto pola za priključitev vnanjega vodnika.The contact lever 3.1 of the pole for connection of the outer conductor is pivotally mounted with its longitudinal hole in the axis 3.2, which is constant with respect to the housing, and at the same time it is laterally movable for a small value so that, in addition to the contact pressure, e.g. offset changes by firing the end 3.3 on the contact side. In this way, the contact lever acts on a fixed contact 4.1, which, via the so-called contact horn 4.2, is included in the short-circuited stirrup 4.3 of the magnetic actuator 4, which, in its turn, surrounds the shell 4.4. From the sheath, the current path of the pole to connect the external conductor directly to the output terminal - not shown - at the top of the switch housing. Envelope 4.4 is surrounded by a magnetic core 4.5 which, at least in the case of short circuits, rotates only the partially actuated actuator lever in a counter-clockwise direction about axis 2.2, which is constant with respect to the housing, thereby triggering a switch mechanism in a manner known per se. 2 on its cranked lever 2.3, so that contact lever 3.1 can be rotated from the closed position shown in FIG. 2, in the unlocked position of FIG. 1. This, in the shortest possible time, the moving movement of opening the contact lever 3.1 is, on the one hand, caused by the contact spring 3.4, which receives left-hand over its bearing position (axis 3.2), and in particular by the actuating lever 2.1, which is accelerated by the magnetic core 4.5 and which, when actuated by its end 2.11 in the form of a hammer, moves sharply towards the end 3.3 of the contact lever on the contact side and opens the contact point of the pole to connect the external conductor.

Natančno v višini tega konca 2.11 v obliki kladiva je kontaktni vzvod 3.1 opremljen z izvrtino 3.5, v katero premikalni drog 9 členkasto vprijema s tečajem 9.1. Premikalni drog je poleg tega stransko voden, npr. med shematično prikazanima prečkama 1.4 okrova, tako da se predvsem v področju kontaktnega vzvoda 7.1 ne more izmakniti. Za tema prečkama okrova je prosti konec premikalnega droga 9 opremljen z drsno ploskvijo 9.2, ki sodeluje s prostim koncem 7.11 kontaktnega vzvoda nevtralnega vodnika in katere način delovanja bo še podrobneje obravnavan. Predvsem v vklopljenem položaju (sl. 2) je premikalni drog tako nameščen in voden na prej opisani način, tako da ima njegova glavna os isto smer kot smer udarca magnetnega jedra 4.5. S tem se zagotovi, da gibanje magnetnega jedra preko konca 2.11 v obliki kladiva in sunkovito odpirajočega se kontaktnega vzvoda 3.1 učinkuje natančno v vzdolžni osi premikalnega droga 9 in ta prenese skoraj celoten učinek udarne kotve. S tem stoji ta sila na razpolago na drsni ploskvi 9.2, da pri postopku odpiranja, potem ko prepotuje kratko prosto pot (razdalja X na sl. 2), udari ob konec 7.11 vzvoda in kontaktni vzvod 7.1 zasuče okoli njegove osi 7.2 v izklopljeni položaj po sl. 1.Exactly at the height of this hammer-shaped end 2.11, the contact lever 3.1 is provided with a bore 3.5 into which the movable rod 9 articulates with the hinge 9.1. The displacement pole is also laterally guided, e.g. between the 1.4 bar frames shown schematically so that it cannot be displaced, especially in the area of contact lever 7.1. Behind these casing cross sections, the free end of the movable bar 9 is provided with a sliding surface 9.2 that cooperates with the free end of the neutral conductor contact lever 7.11 and the operating mode of which will be further discussed. Particularly in the on position (Fig. 2), the displacement pole is positioned and guided in the manner described above such that its main axis has the same direction as that of the magnetic core 4.5. This ensures that the movement of the magnetic core across the end 2.11 in the form of a hammer and a shock-opening contact lever 3.1 is effected precisely in the longitudinal axis of the displacement rod 9, which transfers almost the full effect of the impact angle. This force is thus made available on the sliding surface 9.2 to strike at the end 7.11 of the lever and rotate the lever 7.1 about its offset 7.2 in the opening process after traveling a short free path (distance X in Fig. 2). FIG. 1.

Ta postopek je podprt s kontaktno vzmetjo 3.4 pola za priključitev vnanjega vodnika, ki je znatno močnejša kot kontaktna vzmet 7.4 pola za priključitev nevtralnega vodnika. Ta je prav tako izoblikovana kot natezna vzmet in s svojim daljšim, rahlo zakrivljenim, kljukastim ušescem vprijema v oko 7.5 kontaktnega vzvoda nekako na sredini med osjo 7.2 in kontaktnim mestom 7.3, medtem ko njeno krajše ušesce vprijema preko krajevno stalnega sornika 1.5. Lega tega sornika 1.5 je pri tem prostorsko na ta način prirejena kontaktnemu vzvodu 7.1, da kontaktna vzmet 7.4 v vklopljenem položaju - sl. 2 - vleče na že učinkoviti sorazmerno kratki ročici vzvoda, medtem ko v izklopljeni legi - sl. 1 - ročica vzvoda doseže skoraj vrednost nič. Namišljena povezovalna linija med očesom 7.5 in sornikom 1.5, ki ustreza smeri delovanja kontaktne vzmeti 7.4, poteka zato v izklopljenem položaju kontaktnega vzvoda 7.1 le nekoliko pod oz. skoraj skozi sredino osi 7.2. To pomeni, da kontaktna vzmet 7.4 pri enaki napetosti vzmeti zelo hitro izgublja svojo nasprotno silo in v izklopljenem položaju izvaja le še neznaten levosučen navor na kontaktni vzvod, tako da se ta praktično nahaja v legi mrtve točke. Kontaktni vzvod 7.1 zato leži s svojim koncem 7.11 na drsni ploskvi 9.2 premikalnega droga 9 silosklepno, vendar brez znatnega učinkovanja sile na kontaktni vzvod 3.1 pola za priključitev vnanjega vodnika.This procedure is supported by the contact spring 3.4 of the pole for connecting the external conductor, which is significantly stronger than the contact spring 7.4 of the pole for connecting the neutral conductor. It is also designed as a tensile spring and with its longer, slightly curved, hooked eye, engages in the eye 7.5 of the contact lever in the middle between the axis 7.2 and the contact point 7.3, while its shorter eye is engaged by a locally fixed bolt 1.5. The position of this bolt 1.5 is thus spatially adapted to contact lever 7.1 such that the contact spring 7.4 is in the on position - FIG. 2 - draws on an already effective relatively short lever while in the off position - FIG. 1 - The lever arm reaches almost zero. The imaginary connecting line between eye 7.5 and bolt 1.5, which corresponds to the direction of action of the contact spring 7.4, therefore runs in the off position of the contact lever 7.1 only slightly below or. almost through the center of the axis 7.2. This means that with the same spring tension, contact spring 7.4 loses its counter force very quickly and exerts only a slight left-hand torque on the contact lever in the off position, so that it is practically in the dead center position. Contact lever 7.1 therefore lies with its end 7.11 on the sliding surface 9.2 of the pivot rod 9 in a silo, but without a significant effect of force on the contact lever 3.1 of the pole for connecting the external conductor.

Če se iz tega položaja zaščitni odklopnik ročno preko organa 2.4 za ročno upravljanje in preko v legi onstran mrtve točke nahajajočega se kolenčastega vzvoda 2.3 preklopi v sklenjeni položaj po sl. 2, se kontaktni vzvod 3.1 zasuče okoli svoje osi 3.2 in s seboj potegne premikalni drog 9 preko tečaja v smislu urnega kazalca. V isti smeri se premika na drsni ploskvi 9.2 nalegajoči konec 7.11 vzvoda pod učinkovanjem kontaktne vzmeti 7.4, katere zasučni navor na kontaktni vzvod 7.1 s premikanjem očesa 7.5 postaja postopno večji. Ko je pri tem poteku gibanja kontaktno mesto 7.3 doseglo fiksni kontakt 8.1, tam naleze, pri čemer kontaktna vzmet 7.4 sedaj razvije svojo največjo silo in sama doprinese kontaktni pritisk. Šele zatem doseže kontaktni vzvod 3.1 s svojim koncem 3.3 na strani kontakta fiksni kontakt 4.1 in sklene pol za priključitev vnanjega vodnika. To zaostajanje kontakta vnanjega vodnika je zagotovljeno preko proste poti med drsno ploskvijo 9.2 in koncem 7.11 kontaktnega vzvoda nevtralnega vodnika. Pri tem je pot X, ki je prikazana na sl. 2, merilo za prosto pot pri dokončno napetem stikalnem mehanizmu. Pri prvem dotiku konca 3.3 na kontaktni strani ob fiksni kontakt 4.1 je ta prosta pot še nekoliko večja, ker potem na sl. 2 razpoznavna razdalja med osjo 3.1 in vzdolžno luknjo vsebujočo polcilindrično steno, ki se nahaja pod njo in ki pri postopku vklapljanja deluje kot okrov ležaja, ni prisotna (sl. 1). Ta razdalja pa je pomembna, da se v vklopljenem položaju le na kontaktnem mestu in na kolenčastem vzvodu 2.3 oprti kot s kontaktno vzmetjo 3.4 vlečeni kontaktni vzvod 3.1 zanesljivo drži na osnovi toleranc in potrebne rezerve zaradi odžiga in se stikalni mehanizem preko organa 2.4 za ročno upravljanje lahko napne brez takoimenovanega blokirnega stikala.If, from this position, the protective circuit breaker is manually switched to the closed position according to FIG. 2.4 by means of the manual control body 2.4 and in position beyond the dead point of the locating crank lever 2.3. 2, the contact lever 3.1 rotates about its axis 3.2 and pulls the displacement rod 9 over the hinge in a clockwise direction. In the same direction, the contact end 7.11 of the lever moves on the sliding surface 9.2 under the action of the contact spring 7.4, whose rotational torque on the contact lever 7.1 becomes progressively larger with the movement of the eye 7.5. When contact point 7.3 has reached fixed contact 8.1 in this course of motion, it engages there, with contact spring 7.4 now developing its maximum force and contributing to the contact pressure itself. Only then does the contact lever 3.1 with its end 3.3 on the contact side reach a fixed contact 4.1 and contract the pole to connect the external conductor. This lag of the contact of the external conductor is ensured by the free path between the slide 9.2 and the end 7.11 of the neutral conductor contact lever. Here is the path X shown in FIG. 2, free path criterion for a fully-tensioned switch mechanism. When you first touch the end 3.3 on the contact side of the fixed contact 4.1, this free path is even larger, since then in FIG. 2, a distinguishable distance between the axis 3.1 and the longitudinal hole containing the semi-cylindrical wall below it, which acts as a bearing housing during the fitting process (Fig. 1). However, this distance is important so that, when the ignition is switched on, only the contact point and the crank lever 2.3 is supported as with the contact spring 3.4. The pulled contact lever 3.1 is firmly held on the basis of the tolerances and the necessary reserves due to annealing and the switch mechanism is operated via the manual control body 2.4. it can strain without a so-called blocking switch.

Obratno pa je ta prej omenjena večja prosta pot med drsno ploskvijo 9.2 in koncem 7.11 vzvoda na razpolago tudi pri odklopnem postopku, ker se po sprožitvi kolenčastega vzvoda 2.3 kontaktni vzvod 3.1 zasuče najprej v smislu , ki je nasproten urnemu kazalcu, okoli svojega konca 3.3 na strani kontakta, dokler se stena z vzdolžno luknjo ne nasloni na os 3.2. Pri kratkem stiku se sicer s koncem 2.11 v obliki kladiva nekako hkrati zadane kontaktni vzvod 3.1 v istem smislu sukanja, pri čemer ta gibanja vsekakor glede na hitrost odklopa preidejo druga v drugo. Zagotovljeno je vsaj, da konec 2.11 v obliki kladiva sprožilnega vzvoda dovolj pospeši kontaktni vzvod 3.1 in dovede do razklenitve kontakta, preden premikalni drog 9, potem ko je prepotovalConversely, the aforementioned larger free path between the slide 9.2 and the end 7.11 of the lever is also available during the cut-off process, since after triggering the crank lever 2.3, the contact lever 3.1 rotates first in a counter clockwise fashion around its end 3.3 at of the contact side until the wall with the longitudinal hole rests on the axis 3.2. In the case of a short circuit, the contact hammer 3.1 is somehow simultaneously given to the end 2.11 in the form of a hammer, in the same sense of rotation, and these movements in any case, depending on the speed of disconnection, pass into each other. It is at least ensured that the trigger lever end 2.11 accelerates the contact lever 3.1 sufficiently and causes the contact to be disengaged before the moving rod 9, after having traveled

Ί prosto X”, zadane ob kontaktni vzvod 7.1 pola za priključitev nevtralnega vodnika in ga potisne v odprti položaj (sl. 1).“Free X” given to the contact lever 7.1 of the terminal for connecting the neutral conductor and pushes it to the open position (Fig. 1).

Merilo za prosto pot in s tem nastavitev pravega stikalnega zaporedja pola za priključitev nevtralnega vodnika in pola za priključitev vnanjega vodnika se tudi pri odžigu kontaktov spremeni le neznatno, ker se z nasprotnim smislom sukanja obeh kontaktnih vzvodov 3.1 oz. 7.1 odžig kontaktov medsebojno izravna. Podobno velja za obe kontaktni vzmeti. Preden se pri razklenitvi kontaktnega vzvoda vnanjega vodnika napenjalna sila kontaktne vzmeti 3.1 znatno oslabi, se že predtem navor kontaktne vzmeti 7.4, ki se izvaja na kontaktni vzvod 7.1, zniža na najmanjšo vrednost. Na ta način potekajo stikalne funkcije zaščitenega pola za priključitev vnanjega vodnika v principu prav tako kot pri čistem zaščitnem odklopniku.The criterion for free travel and thus the setting of the right switching sequence of the pole for connecting the neutral conductor and the pole for connecting the external conductor changes only slightly when firing the contacts, since with the opposite sense of twisting of the two contact levers 3.1 or. 7.1 contact ignition is direct. The same applies to both contact springs. Before the tensioning of the contact wire of the outer conductor is relieved significantly when the contact wire of the outer conductor 3.1 is released, the torque of the contact spring 7.4, which is applied to the contact lever 7.1, has already been reduced to a minimum. In this way, the switching functions of the shielded pole are used to connect the external conductor in principle, just as with a pure protective circuit breaker.

ZaFor

AEG Niederspannungstechnik GmbH & Co. KG:AEG Niederspannungstechnik GmbH & Co. KG KG:

Claims

PATENT APPLICATIONS

1. A circuit breaker with a thermally as magnetically shielded terminal for connecting an external conductor and an unprotected terminal for connecting a neutral conductor, each having a contact device created from a fixed contact and a rotary contact lever, and the two contact devices are jointly located in the switch housing with only normal half width as well as mechanically coupled to each other and can be controlled by a manually operated switch mechanism, characterized in that both contact devices (3, 7) are arranged in this plane with respect to the functional plane of the switch mechanism (2) each other with spatially separated mounting points (axles 3.2 and 7.2, respectively) for their contact levers (3.1, 7.1), in order to load the contact levers (3.1, 7.1) coupled by means of a movable rod during the process of switching on and off the spring (9) semi-articulated and partly siloscale, each in the opposite sense of rotation around its ule sites (axes 3.2, 7.2) that the displacement pole (9) is located almost at the extension of the axis of the magnetic actuator (4) equipped with a movable anchor (magnetic core 4.5), that the direction of initiation of the displacement pole (9) coincides with the working direction of the displacement angle (magnetic core 4.5) in such a way that, in the case of a short circuit, the contact lever (7.1) of the pole (L) for connecting the neutral conductor in the direction of opening is indirectly hit by a movable angle (magnetic core 4.5), which jerks the contact lever (3.1) pole (L) for connecting the external conductor.

Protective circuit breaker according to claim 1, characterized in that the movable rod (9) is, on the one hand, movably mounted on the contact lever (3.1) of the pole (L) to connect the outer conductor between its bearing position (axis 3.2) and the contact point ( 3.3) of the outer conductor and, on the other hand, holds on the two-handed contact lever (7.1) of the pole (N) for connection of the neutral conductor at its free contact end of the lever (7.11), lying opposite to the place (7.3) for connecting the neutral conductor via the sliding surface (9.2) ).

Protective circuit breaker according to Claims 1 and 2, characterized in that the two contact levers (3.1, 7.1) are rotated thereon in the same sense by rotating the gripping contact springs (3.4, 7.4) in the process of switching on and off via the movable bar (9) at least part of the time they silently clash with one another.

Protective circuit breaker according to one of Claims 1 to 3, characterized in that the contact lever (7.1) of the pole (N) for connection of the neutral conductor is loaded only in the direction of contact by the tensile spring (contact springs 7.4) acting between its bearing points (axis 7.2) and its contact points (7.3).

Protective circuit breaker according to one of Claims 1 to 4, characterized in that a tensile spring (contact spring 7.4) acting on the contact lever (7.1) of the pole (N) for connection of the neutral conductor is secured between its two fixing points ( eye 7.5, bolt 1.5) to rotate its direction of operation near its bearing position (axis 7.2) with the opening contact lever (7.1) of the neutral conductor so that the torque acting on the open contact spring (7.4) goes lever (7.1) in the direction of contraction, towards zero.

Protective circuit breaker according to claims 1 to 4, characterized in that the contact lever (3.1) of the outer conductor during the first opening phase is not obstructed by any counter force of the contact lever (7.1) of the neutral conductor and acts as a normal one-pole protective circuit breaker.

Protective circuit breaker according to one of Claims 1 to 6, characterized in that the two contact levers (3.1, 7.1) are arranged facing each other between the respective fixed contacts (4.1 and 8.1 respectively) and are guided at each end (3.3) or 7.3) on the contact page in the same direction, and in the case of switching in the opposite rotation.

Circuit breaker according to one of Claims 1 to 7, characterized in that the occurring contact firing on the contact devices (3.7) of the pole (L) for connecting the external conductor and the pole (N) for connecting the neutral conductor are mutually balanced.

Protective circuit breaker according to one of claims 1 to 8, characterized in that the contact device (7) for the pole (N) for connection of the neutral conductor in the base (1.1) of the housing is located directly adjacent to the area of the input terminals (8).

Protective circuit breaker according to one of Claims 1 to 9, characterized in that the movable rod (9), which is contacted on the plug (9.1) by the contact lever (3.1) of the pole (L) for connecting the outer conductor, is open end (sliding surface 9.2) acting on the contact lever (7.1) of the pole (N) to connect the neutral conductor, secured only against the lateral displacement of the base (1.1) of the housing.

Protective circuit breaker according to one of Claims 1 to 10, characterized in that the shielded pole (L) for connecting the outer conductor is constructed with its essential components (modules 2, 3, 4, 5, 6) predominantly available, equal to designed functional parts of a normal circuit breaker that does not have a pole (N) to connect the neutral conductor.