DK158423B

DK158423B - ELECTRICAL CONNECTOR

Info

Publication number: DK158423B
Application number: DK494184A
Authority: DK
Inventors: Sven Bachler; Mats Johansson
Original assignee: Asea Ab
Priority date: 1983-10-18
Filing date: 1984-10-16
Publication date: 1990-05-14
Also published as: SE8305723L; SE8305723D0; NL8403139A; DK494184D0; FI844089A0; GB2149577B; GB8426242D0; DK158423C; GB2149577A; FI844089L; FI77743B; DK494184A; FI77743C; SE439559B

Description

DK 158423 BDK 158423 B

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Den foreliggende opfindelse angår et en- eller flerpolet elektrisk koblingsapparat, fortrinsvis en belastningsafbryder eller sikkerhedsafbryder for lavspænding af den art, som i hver pol har to på et afbryderstel i afstand fra hinanden anbragte faste kontakt-5 elementer og to aflange i hovedsagen parallelle bevægelige kontaktelementer, der er indrettet til i det elektriske koblingsapparats til kobl i ngssti1 ling under indvirkning af kontakttryksfjedre at presses mod de faste kontaktelementer på modsatte sider af disse.BACKGROUND OF THE INVENTION The present invention relates to a single or multiple pole electrical coupler, preferably a low voltage load switch or safety switch of the kind having two fixed contact elements and two elongate, substantially parallel, movable contact elements on each switch frame. , which is arranged to be pressed against the fixed contact elements on opposite sides thereof in the electrical coupling device for coupling in the actuating position under the influence of contact pressure springs.

Til- og frakobling tilvejebringes ved hjælp af et mellem de bevæge-10 lige kontaktelementer forskydeligt kileformet organ, der sammen med kontakttryksfjedrene er anbragt på en mellem to endesti 11 i nger lineært forskydelig kontaktfører. De bevægelige kontaktelementer er styret i afbryderstellet på en sådan måde, at de under kontaktførerens forskydning bevæger sig i hovedsagen vinkelret på kontaktføre-15 rens forskydningsretning.Coupling and disconnection is provided by means of a wedge-shaped member displaceable between the movable contact elements which, together with the contact pressure springs, is arranged on a linearly displaceable contact guide between two end stages 11. The movable contact members are controlled in the switch frame in such a way that during the displacement of the contact driver they move substantially perpendicular to the displacement direction of the contact driver.

En afbryderkonstruktion af den ovenfor nævnte art er kendt fra svensk fremlæggelsesskrift nr. 426.995. Ved den kendte konstruktion er de bevægelige kontaktelementer påvirket af kraften fra kontakttryksfjedrene under hele manøvreforløbet ved til- og frakobling.A switch construction of the kind mentioned above is known from Swedish Patent Specification No. 426,995. In the known construction, the movable contact elements are influenced by the force of the contact pressure springs during the entire maneuvering process when switching on and off.

20 Dette medfører en stor friktionsmodstand under kontaktelementernes bevægelse langs kileorganet, hvilket igen medfører, at afbryderen skal forsynes med et kraftigt manøvreorgan, som bliver pladskrævende og kostbart. Desuden udsættes kileorganet og andre detaljer i det bevægelige kontaktorgan derved for en relativt stor slitage.This results in a large frictional resistance during the movement of the contact elements along the wedge member, which in turn causes the switch to be equipped with a powerful maneuvering device which becomes space consuming and expensive. In addition, the wedge member and other details of the moving contact member are thereby subjected to a relatively large wear.

25 Formålet med den foreliggende opfindelse er at videreudvikle den ovennævnte kendte konstruktion, således at den nødvendige energimængde til til- og frakobling bliver væsentligt lavere, hvilket indebærer, at man kan klare sig med et mindre og billigere manøvreorgan. Dette opnås ifølge opfindelsen ved en konstruktion, 30 som har de i krav 1 angivne kendetegn. Ved en sådan konstruktion kan man ved afbrydertilkobling udøve kontakttrykket, først når dette virkelig behøves, nemlig i tilkoblingsforløbets slutfase. Derved reduceres den nødvendige manøvreenergi, og man kan klare sig med et mindre og billigere manøvreorgan. Eftersom kontaktbevægelsen under 35 tilkoblingsforløbets første del desuden sker på det nærmeste friktionsfrit, opnås en hurtigere kontaktacceleration, hvilket giver distinkt kontaktslutning med mindre risiko for kontaktsvejsning ved tilkobling mod kortslutning. Afbryderens slutteevne bliver derved højere.The object of the present invention is to further develop the aforementioned known construction so that the required amount of energy for switching on and off is substantially lower, which means that one can cope with a smaller and cheaper maneuvering means. This is achieved in accordance with the invention by a structure having the characteristics of claim 1. In such a construction, the switching pressure can be exerted only when this is really needed, namely in the final phase of the switching process. This reduces the required maneuvering energy and can be done with a smaller and cheaper maneuvering means. Furthermore, since the contact movement during the first part of the connection process occurs at the nearest friction-free, a faster contact acceleration is achieved, which gives distinct contact closure with less risk of contact welding when connected to short circuit. The end capability of the switch thereby becomes higher.

22

DK 158423BDK 158423B

Opfindelsen skal herefter forklares nærmere under henvisning til tegningen, hvor fig. 1 i et planbi Ilede viser den centrale del af en udførelsesform for en belastningsafbryder ifølge 5 opfindelsen i frakoblingsstillingen med afbryderstellets overdel fjernet, fig. 2 skematisk et billede i retning af pilen II (fig. 1) af afbryderens kontaktsystem og kontaktfører og fig. 3a-3c i billeder fra siden i retning af pilen III (fig. 1) 10 kontaktsystemet og kontaktføreren i frakoblingssti 11 i ngen (fig. 3a) i en mellemstilling under et tilkoblingsforløb (fig. 3b) og i tilkoblingsstillingen (fig. 3c).The invention will now be explained in more detail with reference to the drawing, in which fig. 1 in a plan view, the central part of an embodiment of a load switch according to the invention shows in the switch-off position with the top of the switch frame removed; FIG. 2 is a diagrammatic view in the direction of arrow II (fig. 1) of the switch's contact system and contact guide; and fig. 3a-3c in side views in the direction of arrow III (Fig. 1) 10 the contact system and the contact guide in the disconnection path 11 in the second (Fig. 3a) in an intermediate position during a switching process (Fig. 3b) and in the switching position (Fig. 3c) .

Den belastningsafbryder, som tegningen viser en del af, er med 15 undtagelse af det bevægelige kontaktorgan udført i princippet på samme måde som den i svensk fremlæggelsesskrift nr. 425.995 beskrevne afbryder.With the exception of the movable contact means, the load switch of which the drawing shows part is made in principle in the same way as the switch described in Swedish Patent Specification No. 425,995.

Afbryderen har et af isolerende materiale udført stel 11, i hvilket to i afstand fra hinanden anbragte faste kontaktelementer 20 21,22 er fastgjort. Afstanden mellem de faste kontaktelementer 21,22 slås der bro over af to parallelle bevægelige kontaktelementer 31,32, der i afbryderens ti 1 kobl ingssti11 ing ved påvirkning af hver sin kontakttryksfjeder 41,42 presses mod de faste kontaktelementer 21,22 på hver sin side af disse.The switch has an insulating material frame 11, in which two fixed contact elements 20, 21, 22 are spaced apart. The distance between the fixed contact elements 21,22 is bridged by two parallel movable contact elements 31,32 which are pressed into the switching position of the switch 10 by actuating each contact pressure spring 41,42 against the fixed contact elements 21,22 on each side. of these.

25 De dele af de faste og bevægelige kontaktelementer, som udfører slutte- og brydefunktionerne, er udformet med kontakttunger henholdsvis 23 og 33, som rager ind i afbryderpolens to brydekamre 12,13.The parts of the fixed and movable contact elements which perform the closing and switching functions are formed with contact tongues 23 and 33 respectively, which project into the two switching chambers 12,13 of the switch pole.

De bevægelige kontaktelementer 31,32 er fastgjort i en kon-30 taktfører 51 i form af en rektangulær plade, der er forskydelig i en rende 14 i afbryderstellet 11. Kontaktføreren 51 har en gennemgående åbning 52, hvis ene side dannes af et i kontaktførerens forskydningsretning orienteret kileformet organ 53. De bevægelige kontaktelementer strækker sig gennem åbningen 52, hvor de i afbryderens 35 frakoblingsstilling ligger på hver sin side af det kileformede organ.The movable contact members 31, 32 are secured to a contact guide 51 in the form of a rectangular plate which is displaceable in a channel 14 in the switch frame 11. The contact guide 51 has a through opening 52, one side of which is formed by a displacement direction of the contact driver. oriented wedge-shaped member 53. The movable contact members extend through aperture 52 where, in the disengaging position of the switch 35, they are located on either side of the wedge-shaped member.

Mellem hvert af de bevægelige kontaktelementer 31,32 og den tilhørende kontakttryksfjeder henholdsvis 41 og 42 er der anbragt en styreplade henholdsvis 61 og 62. Styrepladerne er bevægelige i en 3Between each of the movable contact elements 31,32 and the associated contact pressure spring 41 and 42, respectively, a guide plate 61 and 62 are respectively placed. The control plates are movable in a 3

DK 158423BDK 158423B

slids 54 i kontaktføreren 51 og er udført med et rektangulært hul 63, i hvilket den tilhørende kontakttryksfjeder ligger. Kontakttryksfjedrene udgøres af skruefjedre, som er indspændt mellem en kant af hullet 63 og et med en styretap 55 forsynet støttepunkt i 5 kontaktføreren 51.slot 54 in the contact guide 51 and is provided with a rectangular hole 63 in which the associated contact pressure spring lies. The contact pressure springs are comprised of coil springs which are clamped between an edge of the hole 63 and a supporting point 55 provided with a guide pin 55 in the contact guide 51.

På sin mod det tilhørende bevægelige kontaktelement vendende kantflade er hver styreplade udformet med to hæle 64,65, der i afbryderens ti 1 kobl i ngssti11 i ng ligger på hver sin side af kontaktelementets midterparti.On its edge surface facing the associated movable contact element, each guide plate is formed with two heels 64,65, which in each switch of the switch 1 in the angular path lie on each side of the middle part of the contact element.

10 I afbryderens frakobl ingssti11 ing (fig. 3a) støder styrepla derne 61, 62 med deres hæl 64 mod det kileformede organ 53's ægparti, hvorved der mellem kileorganet og den respektive styreplade dannes en spalte 70, hvis bredde er større end tykkelsen af kontaktelementets midterparti.10 In the switch-off position of the switch (Fig. 3a), the control plates 61, 62 with their heel 64 abut against the egg portion of the wedge-shaped member 53, thereby forming a gap 70, the width of which is greater than the thickness of the middle portion of the contact element. .

15 Ved tilkobling af afbryderen fra den i fig. 3a viste frakob lingsstilling forskydes kontaktføreren 51 i retning A ved hjælp af et ikke vist manøvreorgan, hvorved det kileformede organ 53 trækkes nedad fra sin stilling mellem de bevægelige kontaktelementer 31,32.15 When switching on the switch from the one in fig. 3a, the contact driver 51 is displaced in the direction A by means of an actuator not shown, whereby the wedge-shaped member 53 is pulled downward from its position between the movable contact elements 31,32.

Disse kontaktelementer er styret såvel i spor 56 i kontaktføreren 51 20 som i spor 15 i afbryderstellet, hvorved de vil bevæge sig vinkelret på kontaktførerens forskydningsretning. Under den første del af tilkoblingsbevægelsen påvirkes de bevægelige kontaktelementer ikke af kontakttryksfjedrene, hvorved kontaktbevægelsen sker på det nærmeste friktionsfrit. Fjedrene 41,42 med deres styreplader 61,62 25 bevæger sig ikke i forhold til kontaktføreren under denne del af tilkoblingen. I den i fig. 3b viste mellemstilling støder kontaktelementernes midterparti mod styrepladernes hæle 64 og skubber pladerne ned fra kileorganet 53. Kraften fra fjedrene 41,42 bliver derefter påtrykt de bevægelige kontaktelementer over styrepladerne, 30 som fikseres mod kontaktelementerne, ved at pladernes hæle 64,65 rager ned på begge sider af det respektive kontaktelement. Kontaktslutningen sker ved spidsen af kontakttungerne 23,33, hvorefter de bevægelige kontaktelementer ruller på de faste kontaktelementer til den i fig. 3c viste endestilling.These contact elements are controlled both in grooves 56 in the contact guide 51 20 and in groove 15 in the switch frame, whereby they will move perpendicular to the displacement direction of the contact driver. During the first part of the coupling movement, the moving contact elements are not affected by the contact pressure springs, whereby the contact movement occurs at the nearest friction-free. The springs 41,42 with their guide plates 61.62 25 do not move relative to the contact guide during this part of the connection. In the embodiment shown in FIG. 3b, the middle portion of the contact elements abuts the heels 64 of the control plates and pushes the plates down from the wedge member 53. The force from the springs 41,42 is then applied to the movable contact elements over the control plates 30 which are fixed to the contact elements by the heels of the plates 64,65 projecting down on both sides of the respective contact element. The contact closure occurs at the tip of the contact tongs 23,33, after which the movable contact elements roll on the fixed contact elements to the one shown in FIG. 3c.

35 Ved frakobling af afbryderen forskydes kontaktføreren 51 i modsat retning, hvorved dens kileformede organ 53 føres ind mellem de bevægelige kontaktelementer 31,32 og presser disse fra hinanden mod virkningen af fjedrene 41,42. Kontaktelementerne 31,32 vil derved dreje således, at kontakttungerne 33 ruller på de faste35 When switching off the switch, the contact guide 51 is displaced in the opposite direction, whereby its wedge-shaped member 53 is inserted between the movable contact members 31,32 and pushes them apart against the action of the springs 41,42. The contact elements 31, 32 will thereby rotate so that the contact tongues 33 roll on the fasteners

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4 kontaktelementers kontakttunger 23. Kontaktåbningen vil derved ske ved spidsen af kontakttungerne, hvorved man opnår, at de kontaktflader, som fører den normale belastningsstrøm, ikke udsættes for lysbuebrandskader. Under frakoblingsbevægelsen presses de bevægelige 5 kontaktelementer mod styrepladernes hæle 65, hvorved styrepladerne trækkes op til deres hvilestilling på kileorganet 53, hvorved de bevægelige kontaktelementer frikobles fra kontakttryksfjedrene.4 contact tongues of the contact elements 23. The contact opening will thereby occur at the tip of the contact tongues, thereby ensuring that the contact surfaces which carry the normal load current are not exposed to arc burns. During the disengagement movement, the moving contact elements are pressed against the heels 65 of the control plates, thereby pulling the control plates up to their resting position on the wedge member 53, whereby the movable contact elements are released from the contact pressure springs.

10 15 20 25 30 3510 15 20 25 30 35

Claims

An electrical coupling device containing two fixed contact elements (21, 22) 5 arranged on a switching frame (11) and two elongate substantially parallel movable contact elements (31, 32) arranged in the actuating position of the electrical coupling device of contact pressure springs (41, 42) being pressed against the fixed contact elements (21, 22) on opposite sides thereof, where connection and disconnection is provided by means of a wedge-shaped member (8) displaceable between the movable contact elements (31, 32). , which together with the contact pressure springs (41, 42) are arranged on a linearly displaceable contact guide (51) between two end stages 11 and the movable contact elements (31, 32) are controlled in the switch frame (11) in such a way that during the displacement of the contact driver 15 (51), they move substantially perpendicular to the displacement direction of the contact driver, characterized in that between each of the movable contact elements (31, 32) and a corresponding contact pressure spring (41, 42) is provided with a control means (61) fixed in the contact guide (51), which is designed so that, when the electrical coupling device is switched on, the associated moving contact element is displaced from a rest position in which the movable contact element is free coupling from the associated contact pressure spring to a working position in which the movable contact element is connected and actuated by the contact pressure spring via the control means.

Electric coupler according to claim 1, characterized in that the control means (61) is formed with a heel (64) which in said whimpering rests against the egg portion of the wedge means (53), so that between the wedge means and the control means is formed. a slot (70) 30 with free movement of the movable contact member (31) arranged to be pressed against the heel (64) towards the end of a coupling movement and to displace the control member (61) from the rest position.

Electric coupler according to claim 2, characterized in that the control means is formed with a second heel (65), which is arranged so that the contact element is pressed against this second heel by disconnecting the electric coupler and pulls the control means (61) up to its resting position on the wedge member (53).

4. An electrical coupler according to claim 1,2 or 3, know an oak net in that the control means (61.62) is made of a plate DK 158423B.

Electrical coupling device according to any one of the preceding claims, characterized in that the contact pressure springs (41, 42) are constituted by screw springs.

Electrical coupler according to any one of the preceding claims, characterized in that the control means (61, 62) has a recess (63) for the associated contact pressure spring (41, 42) which with one end supports the recess (63) ) one edge surface and with its other end towards a supporting point (10) provided with a guide pin (55) in the contact guide (51). 15 20 25 1 35