EP1296340B1 - Cover for interconnecting clamps of a multiphase switching device - Google Patents
Cover for interconnecting clamps of a multiphase switching device Download PDFInfo
- Publication number
- EP1296340B1 EP1296340B1 EP01126643A EP01126643A EP1296340B1 EP 1296340 B1 EP1296340 B1 EP 1296340B1 EP 01126643 A EP01126643 A EP 01126643A EP 01126643 A EP01126643 A EP 01126643A EP 1296340 B1 EP1296340 B1 EP 1296340B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- terminal cover
- insulating case
- leading
- connecting terminals
- switching device
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
- H01H9/02—Bases, casings, or covers
- H01H9/0264—Protective covers for terminals
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- 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
- H01H73/20—Terminals; Connections
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- 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
- H01H2071/0242—Assembling parts of a circuit breaker by using snap mounting techniques
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/44—Means for preventing access to live contacts
- H01R13/447—Shutter or cover plate
Definitions
- the present invention relates to a terminal cover for the terminals of a polyphase electrical switching device with in a common housing for all phases insulating material of the switching device mounted electrical terminals, which are used for the attachment of electrical lines in the terminals, perpendicular to the lines of the surface of the Isolierstoffgeophuses are equipped with recesses accessible clamping screws.
- cover device for securing terminals of electrical installation devices.
- the cover device is approximately L-shaped in cross section. This cover is held with at least one behind projections or recesses on the installation device cross resilient nose on the installation device. This cover device serves as protection against contact for the terminals and does not increase the dielectric strength between the terminals of adjacent phases of the installation device.
- the object of the present invention is to propose a terminal cover for the terminals of a polyphase electrical switching device, which causes the increase of the dielectric strength between the terminals of adjacent phases of the switching device and so meets the requirements of the various standards, e.g. The US standard UL508, in terms of dielectric strength between adjacent terminals of an electrical switching device corresponds and is economically advantageous.
- Terminal cover closely abuts on its side facing the insulating material in the edge region of the leading to the terminal connection openings on the insulating housing with a negligible air gap that the terminal cover is provided on its surface facing away from the insulating material between the cap openings leading to the terminals with protruding, the necessary Kriechweg securing ribs.
- Various standards require testing the dielectric strength between the adjacent terminals of an electrical switching device.
- the terminal cover can be permanently attached to the finished switching device before connecting the electrical lines by snap connections.
- Various standards require that a terminal cover on the insulating housing must be permanently attached. This is achieved by the intended, non-releasable snap connections.
- the terminal cover advantageously has, on its side facing the insulating housing, at least one holding extension engaging behind the insulating housing and at least one snap-action nose engaging behind a projection of the insulating housing. This arrangement allows the permanent attachment of the terminal cover on the insulating material without screw, which is particularly advantageous for relatively small switching devices.
- the L-shaped terminal cover cap can be screwed in the region of the recesses leading to the terminals on the insulating housing and with the leg perpendicular thereto on the insulating housing with at least one be on the insulating housing engaging behind retaining stop and secured with at least one engaging on a projection of the insulating housing snap-action nose.
- the snap-on nose acting on the insulating housing secures the permanent attachment of the terminal cover cap to the insulating housing.
- the terminal cover cap may have separating recesses projecting into the cavity of the recesses leading to the terminals of adjacent phases.
- the dividing extensions engaging in the cavity of the recesses leading to the terminals serve as an electrical barrier and increase the limit of the minimum test voltage required for the switching device.
- FIG 1 a relatively small electrical switching device is shown in perspective.
- the switching device with switching contact pieces, contact actuating mechanism and terminals is housed in an insulating material 1.
- the unillustrated electrical lines can be inserted through the connection openings 5, 6, 7 to the terminals.
- the measures provided for fixing the electrical wires in the terminals, perpendicular to the lines clamping screws are accessible from the surface of the insulating housing 1 through the recesses 2, 3, 4.
- the leakage path between the terminals on the surface of the insulating material is insufficient to maintain the test voltage prescribed in various standards. That brings in the Figures 2, 3 and 4 shown terminal cover 8 remedy.
- FIGS. 2 and 3 show the terminal cover 8 from the side facing away from the insulating material 1 side.
- FIGS. 2 and 3 show the terminal cover 8 from the side facing away from the insulating material 1 side.
- the through the recesses 5, 6, 7 leading to the terminals not shown recesses 9, 10, 11 and between the well visible in Figure 4 cap openings 12, 13, 14 lying, multi-layered ribs 15, 16 are good recognizable.
- the two side ribs 17, 18 increase the creepage distance to the outer terminals of an adjacent switching device, not shown, and form the lateral termination of the terminal cover cap eighth
- the L-shaped, attached to the switching device terminal cover 8 extends with its one leg on the leading to the clamping screws recesses 2, 3, 4 and with the other leg on the connection terminals leading to the connection openings 5, 6, 7.
- Fig. 4 shows two retaining extensions 19, 20, which are introduced during assembly of the terminal cover 8 on the switching device in the mounted in the insulating housing 1 holding openings 21.
- the visible in Figure 4 snap-on nose 22 at the end of a groove lying projection 23 of the insulating 1 and ensures a permanent connection between the terminal cover 8 and the insulating 1.
- This permanent connection is prescribed in various standards ,
- the terminal cover 8 is located with the insulating housing 1 facing edge portions of the cap openings 9, 10, 11 at the edge regions of the connection openings 5, 6, 7 of the insulating material 1 closely. These tight around the connection openings 5, 6, 7 adjacent parts of the terminal cover 8 increase the electrical resistance between the terminals of the electrical device detectable, so that the required in the various provisions electrical resistance between the terminals of an electrical switching device using the terminal cover 8 is reached ,
- Trennfort systems 24 are formed on the terminal cover, which protrude into the existing in the insulating 1 recesses 5, 6, 7 and so contribute to Kriechwegverinrung.
- the Dividing extensions 24 may have different shapes and correspondingly protrude into only a part or the entire circumference of the recesses 5, 6, 7 in this.
- the terminal cover 32 shown in FIGS. 6, 7 and 8 is intended for a larger switching device.
- the basic arrangement is similar to what has been described previously for a smaller switching device.
- the most important difference between the two arrangements is that in this arrangement, the terminal cover 32 is secured to the insulating housing 25 not only by a snap connection but also by a screw connection.
- the insulating housing 25 in Fig.5 also encloses the switching contact pieces, the contact actuating mechanism and the terminals.
- the electrical lines, not shown, are inserted through the connection openings 29, 30, 31 to the terminals and clamped there with the accessible through the recesses 26, 27, 28 clamping screws. With the help of the terminal cover 32, the electrical strength between the terminals is increased even with this arrangement.
- FIG. 8 shows this terminal cover cap 32 from the side facing the insulating housing 25. 8 shows the cap openings 50, 51, 52 serving to supply the electrical lines to the terminals.
- the terminal cover cap 32 is shown from the side facing away from the insulating housing.
- the protruding ribs 36, 37 which serve to extend the creepage distance between adjacent terminals and thus to increase the electrical strength.
- the lateral end ribs 38,39 are also clearly visible.
- the L-shaped, attached to the switching device terminal cover 32 extends with its one leg on the connection terminals leading to the terminal openings 29, 30, 31. This leg is screwed when mounting the terminal cover 32 with the screws 40 on the insulating housing 25. This leg carries on its side facing the insulating material 25 side two retaining stops 41, 42, which in the assembly in the two on the insulating housing 25 integrally formed nips 43, 44 engage. When mounting the terminal cover 32 this is pressed after introduction of the retaining stops 41, 42 in the nips 43, 44 in the direction of arrow 49 on the Isolierstoffgepuruse 25 until the molded on the inside of the other leg of the L-shaped terminal cover 32 snap-in nose 45 behind the on End of a groove lying projection 46 engages. This snap connection secures the permanent connection between the terminal cover tape 32 and the insulating housing 25. To secure the terminal cover cap 32, the screws 40 which hold the terminal cover cap 32 on the insulating housing 25 serve.
- the Klemmabdeckkappe 32 is with the insulating material 25 facing edge portions of the cap openings 50, 51, 52 at the edge regions of the connection openings 29, 30, 31 of the insulating housing 25 close.
- the close-fitting Isolierstoffmaschine increase between the terminals of the electrical switching device, the electrical resistance in comparison with the electrical strength without terminal cover cap 32nd
- the provided with a positioning pin arm 47 of the terminal cover 32 serves only as an assembly aid.
- terminal cover caps 8 and 32 can be mounted on both connection sides of a symmetrically designed, electrical switching device.
Landscapes
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Motor Or Generator Frames (AREA)
- Breakers (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Klemmenabdeckkappe für die Anschlussklemmen eines mehrphasigen elektrischen Schaltgerätes mit in einem für alle Phasen gemeinsamen Isolierstoffgehäuse des Schaltgerätes untergebrachten elektrischen Anschlussklemmen, die mit für die Befestigung von elektrischen Leitungen in den Anschlussklemmen dienenden, senkrecht zu den Leitungen stehenden, von der Oberfläche des Isolierstoffgehäuses über Aussparungen zugänglichen Klemmschrauben ausgerüstet sind.The present invention relates to a terminal cover for the terminals of a polyphase electrical switching device with in a common housing for all phases insulating material of the switching device mounted electrical terminals, which are used for the attachment of electrical lines in the terminals, perpendicular to the lines of the surface of the Isolierstoffgehäuses are equipped with recesses accessible clamping screws.
Aus der EP-A1-0051755 ist eine Abdeckvorrichtung zur Sicherung von Anschlussklemmen von elektrischen Installationsgeräten bekannt. Die Abdeckvorrichtung ist im Querschnitt annähernd L-förmig. Diese Abdeckvorrichtung wird mit mindestens einer hinter Vorsprünge oder Ausnehmungen am Installationsgerät greifenden federnden Nase am Installationsgerät gehalten. Diese Abdeckvorrichtung dient als Berührungsschutz für die Anschlussklemmen und erhöht die Spannungsfestigkeit zwischen den Anschlussklemmen benachbarter Phasen des Installationsgerätes nicht.From EP-A1-0051755 a cover device for securing terminals of electrical installation devices is known. The cover device is approximately L-shaped in cross section. This cover is held with at least one behind projections or recesses on the installation device cross resilient nose on the installation device. This cover device serves as protection against contact for the terminals and does not increase the dielectric strength between the terminals of adjacent phases of the installation device.
Die Aufgabe der vorliegenden Erfindung ist es, eine Klemmenabdeckkappe für die Anschlussklemmen eines mehrphasigen elektrischen Schaltgerätes vorzuschlagen, die die Erhöhung der Spannungsfestigkeit zwischen den Anschlussklemmen benachbarter Phasen des Schaltgerätes bewirkt und so den Forderungen der verschiedenen Normen, z.B. der USA Norm UL508, in bezug auf die Spannungsfestigkeit zwischen benachbarten Anschlussklemmen eines elektrischen Schaltgerätes entspricht und wirtschaftlich vorteilhaft ist.The object of the present invention is to propose a terminal cover for the terminals of a polyphase electrical switching device, which causes the increase of the dielectric strength between the terminals of adjacent phases of the switching device and so meets the requirements of the various standards, e.g. The US standard UL508, in terms of dielectric strength between adjacent terminals of an electrical switching device corresponds and is economically advantageous.
Die gestellte Aufgabe ist dadurch gelöst, dass zur Sicherung der elektrischen Festigkeit zwischen den Anschlussklemmen benachbarter Phasen, die L-förmig ausgebildete, mit dem einen Schenkel sich über die zu den Klemmschrauben führenden Aussparungen und mit dem anderen Schenkel über die zu den Anschlussklemmen führenden Anschlussöffnungen erstreckende Klemmenabdeckkappe an ihrer dem Isolierstoffgehäuse zugekehrten Seite im Randbereich der zu den Anschlussklemmen führenden Anschlussöffnungen am Isolierstoffgehäuse mit einem vernachlässigbar kleinen Luftspalt eng anliegt, dass die Klemmenabdeckkappe an ihrer dem Isolierstoffgehäuse abgekehrten Oberfläche zwischen den zu den Anschlussklemmen führenden Kappenöffnungen mit vorstehenden, den erforderlichen Kriechweg sichernden Rippen versehen ist. Verschiedene Normen verlangen die Prüfung der Spannungsfestigkeit zwischen den benachbarten Anschlussklemmen eines elektrischen Schaltgerätes. Der üblicherweise vorhandene Kriechweg auf der Oberfläche des zwischen den Anschlussklemmen liegenden Isoliermaterials reicht in Ausnahmefällen nicht aus, die vorgeschriebene Prüfspannung zu halten. Dadurch, dass die Klemmenabdeckkappe an ihrer dem Isolierstoffgehäuse zugekehrten Seite im Randbereich der zu den Anschlussklemmen führenden Anschlussöffnungen am Isolierstoffgehäuse mit einem vernachlässigbar kleinen Luftspalt eng anliegt, entsteht eine Barriere, die eine von verschiedenen Vorschriften verlangte höhere Prüfspannung halten kann als die gleiche Strecke ohne anliegende Klemmenabdeckkappe. Diese Massnahme ermöglicht die Erhöhung der Spannungsfestigkeit zwischen benachbarten Anschlussklemmen, ohne dass durch Vergrösserung des Isolierstoffgehäuses der Kriechweg verlängert würde. An der dem Isolierstoffgehäuse abgekehrten Seite der Klemmenabdeckkappe ist für das Anbringen von Rippen genügend Platz vorhanden, so dass an dieser Seite der Kriechweg durch die zwischen den zu den Anschlussklemmen führenden Kappenöffnungen mit den angebrachten Rippen der Prüfspannung entsprechend vergrössert wird.The stated object is achieved in that for securing the electrical strength between the terminals of adjacent phases, the L-shaped, with one leg extending over the leading to the clamping screws recesses and with the other leg on the connection terminals leading to the connection openings extending Terminal cover closely abuts on its side facing the insulating material in the edge region of the leading to the terminal connection openings on the insulating housing with a negligible air gap that the terminal cover is provided on its surface facing away from the insulating material between the cap openings leading to the terminals with protruding, the necessary Kriechweg securing ribs. Various standards require testing the dielectric strength between the adjacent terminals of an electrical switching device. The usual existing creepage on the surface of lying between the terminals insulating material is not sufficient in exceptional cases, to keep the prescribed test voltage. The fact that the terminal cover on its side facing the insulating material in the edge region of leading to the terminal connection openings on Isolierstoffgehäuse with a negligibly small air gap fits tightly, creates a barrier that can hold a higher test voltage required by different regulations than the same route without fitting terminal cover , This measure makes it possible to increase the dielectric strength between adjacent terminals, without extending the creepage distance by increasing the size of the insulating material housing. On the side facing away from the Isolierstoffgehäuse Klemmabdeckkappe sufficient space is available for the attachment of ribs, so that on this side of the creepage distance is increased by the leading to the terminals cap openings with the attached ribs of the test voltage accordingly.
Die Klemmenabdeckkappe kann am fertigen Schaltgerät vor dem Anschluss der elektrischen Leitungen durch Schnappverbindungen unlösbar befestigt sein. Verschiedene Normen verlangen, dass eine Klemmenabdeckkappe am Isolierstoffgehäuse unlösbar befestigt werden muss. Dies wird durch die vorgesehenen, unlösbaren Schnappverbindungen erreicht.The terminal cover can be permanently attached to the finished switching device before connecting the electrical lines by snap connections. Various standards require that a terminal cover on the insulating housing must be permanently attached. This is achieved by the intended, non-releasable snap connections.
Die Klemmenabdeckkappe weist vorteilhafterweise an ihrer dem Isolierstoffgehäuse zugekehrten Seite mindestens einen im Isolierstoffgehäuse hintergreifenden Haltefortsatz und mindestens eine an einem Vorsprung des Isolierstoffgehäuses hintergreifende Schnappnase auf. Diese Anordnung ermöglicht die unlösbare Befestigung der Klemmenabdeckkappe am Isolierstoffgehäuse ohne Schraubverbindung, was insbesondere bei relativ kleinen Schaltgeräten vorteilhaft ist.The terminal cover advantageously has, on its side facing the insulating housing, at least one holding extension engaging behind the insulating housing and at least one snap-action nose engaging behind a projection of the insulating housing. This arrangement allows the permanent attachment of the terminal cover on the insulating material without screw, which is particularly advantageous for relatively small switching devices.
Die L-förmige Klemmenabdeckkappe kann im Bereich der zu den Anschlussklemmen führenden Aussparungen am Isolierstoffgehäuse angeschraubt und mit dem senkrecht dazu stehenden Schenkel am Isolierstoffgehäuse mit mindestens einem am Isolierstoffgehäuse hintergreifenden Halteanschlag und mit mindestens einer an einem Vorsprung des Isolierstoffgehäuses angreifenden Schnappnase befestigt sein. Die am Isolierstoffgehäuse angreifende Schnappnase sichert die unlösbare Befestigung der Klemmenabdeckkappe am Isolierstoffgehäuse.The L-shaped terminal cover cap can be screwed in the region of the recesses leading to the terminals on the insulating housing and with the leg perpendicular thereto on the insulating housing with at least one be on the insulating housing engaging behind retaining stop and secured with at least one engaging on a projection of the insulating housing snap-action nose. The snap-on nose acting on the insulating housing secures the permanent attachment of the terminal cover cap to the insulating housing.
Die Klemmenabdeckkappe kann in den Hohlraum der zu den Anschlussklemmen benachbarter Phasen führenden Aussparungen hineinragende Trennfortsätze aufweisen. Die in den Hohlraum der zu den Anschlussklemmen führenden Aussparungen eingreifenden Trennfortsätze dienen als elektrische Barriere und erhöhen die Grenze der für das Schaltgerät verlangte minimale Prüfspannung.The terminal cover cap may have separating recesses projecting into the cavity of the recesses leading to the terminals of adjacent phases. The dividing extensions engaging in the cavity of the recesses leading to the terminals serve as an electrical barrier and increase the limit of the minimum test voltage required for the switching device.
Im folgenden wird die Erfindung anhand der beiliegenden Zeichnungen näher beschrieben. Es zeigen:
- Fig.1
- die perspektivische Darstellung eines verhältnismässig kleinen elektrischen Schaltgerätes ohne Klemmenabdeckkappe,
- Fig.2
- eine dazu passende Klemmenabdeckkappe
- Fig.3
- die in Fig.2 gezeigte Klemmenabdeckkappe in einem anderen Masstab von der dem Schaltgerät abgekehrten Seite her gesehen und
- Fig.4
- von der dem Schaltgerät zugekehrten Seite her gesehen,
- Fig.5
- die perspektivische Darstellung eines verhältnismässig grossen elektrischen Schaltgerätes ohne Klemmenabdeckkappe und
- Fig.6
- eine Klemmenabdeckkappe dazu,
- Fig.7
- die in Fig.6 gezeigte Klemmenabdeckkappe in einem anderen Masstab von der dem Schaltgerät abgekehrten Seite her gesehen und
- Fig.8
- von der dem Schaltgerät zugekehrten Seite her gesehen.
- Fig.1
- the perspective view of a relatively small electrical switching device without terminal cover,
- Fig.2
- a matching terminal cover
- Figure 3
- the terminal cover shown in Figure 2 in another scale from the side facing away from the switching device and seen
- Figure 4
- from the side facing the switchgear,
- Figure 5
- the perspective view of a relatively large electrical switching device without terminal cover and
- Figure 6
- a terminal cover to
- Figure 7
- the terminal cover shown in Figure 6 in another scale from the side facing away from the switching device and seen
- Figure 8
- seen from the switching device side facing.
In Fig.1 ist ein verhältnismässig kleines elektrisches Schaltgerät perspektivisch dargestellt. Das Schaltgerät mit Schaltkontaktstücken, Kontaktbetätigungsmechanismus und Anschlussklemmen ist in einem Isolierstoffgehäuse 1 untergebracht. Die nicht dargestelleten elektrischen Leitungen können durch die Anschlussöffnungen 5, 6, 7 zu den Anschlussklemmen eingeführt werden. Die zur Befestigung der elektrischen Leitungen in den Anschlussklemmen vorgesehenen, senkrecht zu den Leitungen stehenden Klemmschrauben sind von der Oberfläche des Isolierstoffgehäuses 1 durch die Aussparungen 2, 3, 4 zugänglich. Für verschiedene Vorschriften reicht der zwischen den Anschlussklemmen auf der Oberfläche des Isoliermaterials vorhandene Kriechweg nicht aus, die in verschiedenen Normen vorgeschriebene Prüfspannung zu halten. Da bringt die in den Figuren 2, 3 und 4 gezeigte Klemmenabdeckkappe 8 Abhilfe.In Figure 1, a relatively small electrical switching device is shown in perspective. The switching device with switching contact pieces, contact actuating mechanism and terminals is housed in an
Um die Ausbildung der Klemmenabdeckkappe 8 in Einzelheiten zu zeigen, ist in den Figuren 2 und 3 die gleiche Klemmenabdeckkappe 8 in einem anderen Masstab dargestellt. Diese Figuren 2 und 3 zeigen die Klemmenabdeckkappe 8 von der dem Isolierstoffgehäuse 1 abgekehrten Seite her. In diesen Figuren sind die durch die Aussparungen 5, 6, 7 zu den nicht dargestellten Anschlussklemmen führenden Aussparungen 9, 10, 11 und die zwischen den in der Fig.4 gut sichtbaren Kappenöffnungen 12, 13, 14 liegenden, mehrschichtigen Rippen 15, 16 gut erkennbar. Die beiden Seitenrippen 17, 18 erhöhen den Kriechweg zu den äusseren Anschlussklemmen eines benachbarten, nicht dargestellten Schaltgerätes und bilden den seitlichen Abschluss der Klemmenabdeckkappe 8.In order to show in more detail the design of the
Die L-förmig ausgebildete, am Schaltgerät angebrachte Klemmenabdeckkappe 8 erstreckt sich mit ihrem einen Schenkel über die zu den Klemmschrauben führenden Aussparungen 2, 3, 4 und mit dem anderen Schenkel über die zu den Anschlussklemmen führenden Anschlussöffnungen 5, 6, 7. In Fig.4 erkennt man zwei Haltefortsätze 19, 20, die bei der Montage der Klemmenabdeckkappe 8 auf das Schaltgerät in die im Isolierstoffgehäuse 1 angebrachten Halteöffnungen 21 eingeführt werden. Am Ende der in Pfeilrichtung 48 erfolgten Einführbewegung greift die in Fig.4 sichtbare Schnappnase 22 am Ende einer Nut liegenden Vorsprung 23 des Isolierstoffgehäuses 1 an und sichert eine unlösbare Verbindung zwischen der Klemmenabdeckkappe 8 und dem Isolierstoffgehäuse 1. Diese unlösbare Verbindung ist in verschiedenen Normen vorgeschrieben.The L-shaped, attached to the switching
Die Klemmenabdeckkappe 8 liegt mit den dem Isolierstoffgehäuse 1 zugekehrten Randbereichen der Kappenöffnungen 9, 10, 11 an den Randbereichen der Anschlussöffnungen 5, 6, 7 des Isolierstoffgehäuses 1 eng an. Diese um den Anschlussöffnungen 5, 6, 7 eng anliegenden Teile der Klemmenabdeckkappe 8 erhöhen die elektrische Festigkeit zwischen den Anschlussklkemmen des elektrischen Gerätes nachweisbar, so dass die in den verschiedenen Vorschriften geforderte elektrische Festigkeit zwischen den Anschlussklemmen eines elektrischen Schaltgerätes mit Hilfe der Klemmenabdeckkappe 8 erreichbar ist.The
Um die Spannungsfestigkeit zwischen den im Isolierstoffgehäuse 1 liegenden Anschlussklemmen zu erhöhen, sind an der Klemmenabdeckkappe 8 Trennfortsätze 24 ausgebildet, die in die im Isolierstoffgehäuse 1 vorhandenen Aussparungen 5, 6, 7 hineinragen und so zur Kriechwegverlängerung beitragen. Die Trennfortsätze 24 können verschiedene Formen aufweisen und entsprechend nur an einem Teil oder am ganzen Umfang der Aussparungen 5, 6, 7 in diese hineinragen.In order to increase the dielectric strength between the lying in the insulating
Die in den Figuren 6, 7 und 8 dargestellte Klemmenabdeckkappe 32 ist für ein grösseres Schaltgerät vorgesehen. Die grundsätzliche Anordnung ist ähnlich wie vorher für ein kleineres Schaltgerät beschrieben worden ist. Der wesentlichste Unterschied zwischen den beiden Anordnungen besteht darin, dass bei dieser Anordnung die Klemmenabdeckkappe 32 am Isolierstoffgehäuse 25 nicht nur durch eine Schnappverbindung, sondern auch durch eine Schraubverbindung befestigt ist.The
Das Isolierstoffgehäuse 25 in Fig.5 umschliesst auch die Schaltkontaktstücke, das Kontaktbetätigungsmechanismus und die Anschlussklemmen. Die nicht dargestellten elektrischen Leitungen werden durch die Anschlussöffnungen 29, 30, 31 zu den Anschlussklemmen eingeführt und dort mit den durch die Aussparungen 26, 27, 28 zugänglichen Klemmschrauben festgeklemmt. Mit Hilfe der Klemmenabdeckkappe 32 wird auch bei dieser Anordnung die elektrische Festigkeit zwischen den Anschlussklemmen erhöht.The insulating
Auch bei dieser Anordnung besteht zwischen den in den beiden Figuren 6 und 7 dargestellten Klemmenabdeckkappen 32 nur ein masstäblicher Unterschied. Fig.8 zeigt diese Klemmenabdeckkappe 32 von der dem Isolierstoffgehäuse 25 zugekehrten Seite her. In dieser Figur 8 erkennt man die zu Zuführung der elektrischen Leitungen zu den Anschlussklemmen dienenden Kappenöffnungen 50, 51, 52. In den Figuren 6 und 7 ist die Klemmenabdeckkappe 32 von der dem Isolierstoffgehäuse abgekehrten Seite her dargestellt. In den Figuren 6, 7 erkennt man die vorstehenden Rippen 36, 37, die zur Verlängerung des Kriechweges zwischen benachbarten Anschlussklemmen und somit zur Erhöhung der elektrischen Festigkeit dienen. Die seitlichen Abschlussrippen 38,39 sind auch gut sichtbar.Also in this arrangement, there is only one masstäblicher difference between the
Die L-förmig ausgebildete, am Schaltgerät angebrachte Klemmenabdeckkappe 32 erstreckt sich mit ihrem einen Schenkel über die zu den Anschlussklemmen führenden Anschlussöffnungen 29, 30, 31. Dieser Schenkel wird bei der Montage der Klemmenabdeckkappe 32 mit den Schrauben 40 am Isolierstoffgehäuse 25 angeschraubt. Dieser Schenkel trägt an seiner dem Isolierstoffgehäuse 25 zugekehrten Seite zwei Halteanschläge 41, 42, die bei der Montage in die beiden am Isolierstoffgehäuse 25 angeformten Spälte 43, 44 eingreifen. Bei der Montage der Klemmenabdeckkappe 32 wird diese nach Einführung der Halteanschläge 41, 42 in die Spälte 43, 44 in Pfeilrichtung 49 auf das Isolierstoffgehäuse 25 gedrückt, bis die an der Innenseite des anderen Schenkels der L-förmigen Klemmenabdeckkappe 32 angeformte Schnappnase 45 hinter dem am Ende einer Nut liegenden Vorsprung 46 greift. Diese Schnappverbindung sichert die unlösbare Verbindung zwischen der Klemmenabdeckkape 32 und dem Isolierstoffgehäuse 25. Zur Sicherung der Klemmenabdeckkappe 32 dienen die Schrauben 40, die die Klemmenabdeckkappe 32 am Isolierstoffgehäuse 25 halten.The L-shaped, attached to the switching
Auch die Klemmenabdeckkappe 32 liegt mit den dem Isolierstoffgehäuse 25 zugekehrten Randbereichen der Kappenöffnungen 50, 51, 52 an den Randbereichen der Anschlussöffnungen 29, 30, 31 des Isolierstoffgehäuses 25 eng an. Die eng aneinanderliegenden Isolierstoffteile erhöhen zwischen den Anschlussklemmen des elektrischen Schaltgerätes die elektrische Festigkeit im Vergleich mit der elektrischen Festigkeit ohne Klemmenabdeckkappe 32.The
Der mit einem Positionierungsstift versehene Arm 47 der Klemmenabdeckkappe 32 dient nur als Montagehilfe.The provided with a
Ein weiterer Vorteil der beschriebenen Anordnungen besteht darin, dass die Klemmenabdeckkappen 8 und 32 an beiden Anschlusseiten eines symmetrisch ausgebildeten, elektrischen Schaltgerätes montiert werden können.A further advantage of the arrangements described is that the terminal cover caps 8 and 32 can be mounted on both connection sides of a symmetrically designed, electrical switching device.
Claims (5)
- Terminal cover (8, 32) for the connecting terminals of a multi-phase electric switching device with electrical connecting terminals accommodated in an insulating case (1, 25) of the switching device common to all of the phases and provided with terminal screws which serve to fix electric lines in the connecting terminals, are disposed perpendicularly to the lines and are accessible from the surface of the insulating case (1, 25) via recesses (2, 3, 4, 26, 27, 28), characterised in that, in order to ensure the electric strength between the connecting terminals of adjacent phases, the L-shaped terminal cover (8, 32) extending by means of one leg over the recesses (2, 3, 4, 26, 27, 28) leading to the terminal screws and by means of the other leg over the connecting openings (5, 6, 7, 29, 30, 31) leading to the connecting terminals bears snugly with a negligibly small gap against the edge region of the connecting openings (5, 6, 7, 29, 30, 31) leading to the connecting terminals on its side directed towards the insulating case (1, 25) and that the terminal cover (8, 32) is provided on its surface directed away from the insulating case (1, 25) between the openings (9, 10, 11, 50, 51, 52) leading to the connecting terminals with projecting ribs (15, 16, 36, 37) ensuring the required creep distance.
- Terminal cover according to claim 1, characterised in that the terminal cover (8, 32) is permanently mounted on the finished switching device by means of snap connections before the electric lines are connected.
- Terminal cover according to one of claims 1 to 2, characterised in that the terminal cover (8) is provided on its side directed towards the insulating case (1) with at least one retaining extension (19, 20) engaging behind the insulating case (1, 25) and at least one snap lug (22) engaging behind a projection (23) of the insulating case (1).
- Terminal cover according to one of claims 1 to 2, characterised in that the L-shaped terminal cover (32) is screwed on to the insulating case (25) in the region of the recesses (29, 30, 31) leading to the connecting terminals and is fixed to the insulating case (25) by means of the leg disposed perpendicularly thereto by means of at least one retaining stop (41, 42) engaging behind the insulating case (25) and by means of at least one snap lug (45) engaging a projection (46) of the insulating case (25).
- Terminal cover according to one of claims 1 to 4, characterised in that the terminal cover (8) has separating extensions (24) projecting into the cavity of the recesses (5, 6, 7) leading to the connecting terminals of adjacent phases.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH17592001 | 2001-09-24 | ||
| CH01759/01A CH695404A5 (en) | 2001-09-24 | 2001-09-24 | Terminal cover for the terminals of a multiphase electrical switching device. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1296340A1 EP1296340A1 (en) | 2003-03-26 |
| EP1296340B1 true EP1296340B1 (en) | 2007-03-07 |
Family
ID=4566168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01126643A Expired - Lifetime EP1296340B1 (en) | 2001-09-24 | 2001-11-08 | Cover for interconnecting clamps of a multiphase switching device |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6767242B2 (en) |
| EP (1) | EP1296340B1 (en) |
| JP (1) | JP2003178636A (en) |
| AT (1) | ATE356417T1 (en) |
| CH (1) | CH695404A5 (en) |
| DE (1) | DE50112163D1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4492210B2 (en) * | 2004-05-19 | 2010-06-30 | 富士電機機器制御株式会社 | Circuit breaker and terminal cover |
| US8169283B2 (en) * | 2010-03-03 | 2012-05-01 | Schneider Electric USA, Inc. | Circuit breaker trip unit support |
| DE102010032522A1 (en) * | 2010-07-28 | 2012-02-02 | Siemens Aktiengesellschaft | Clamping arrangement for a circuit breaker in spring-loaded technology |
| DE102011082191B4 (en) * | 2011-09-06 | 2021-06-24 | Siemens Aktiengesellschaft | Isolation device, circuit breaker and busbar assembly |
| JP5910243B2 (en) * | 2012-03-29 | 2016-04-27 | ブラザー工業株式会社 | Machine tool controller |
| CN103745886B (en) * | 2014-01-14 | 2015-11-25 | 德力西电气有限公司 | A kind of protective cover and shell mechanism increasing contactor insulation performance |
| JP6468067B2 (en) * | 2015-05-13 | 2019-02-13 | 三菱電機株式会社 | Terminal cover and switchgear |
| FR3039008B1 (en) * | 2015-07-16 | 2019-06-14 | Safran Electrical & Power | MULTI-CABLES CONNECTABLE ELECTRICAL CONNECTION DEVICE WITH PROTECTION AGAINST FOREIGN BODILY DAMAGE |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3042029A1 (en) * | 1980-11-07 | 1982-06-16 | Brown, Boveri & Cie Ag, 6800 Mannheim | COVER DEVICE FOR SECURING TERMINALS OF ELECTRICAL INSTALLATION EQUIPMENT |
| GB2099631B (en) * | 1981-04-15 | 1985-04-03 | Mitsubishi Electric Corp | Electric circuit breaker with a terminal cover |
| DE3536213A1 (en) * | 1985-10-10 | 1987-04-16 | Siemens Ag | Protection load interruptor circuit breaker |
| DE3608535C1 (en) * | 1986-03-14 | 1987-05-14 | Wieland Elek Sche Ind Gmbh F | Electrical terminal block having a name-plate support |
| AU5738094A (en) * | 1992-12-03 | 1994-06-22 | Communications Technology Corporation | Sealed insulation displacement terminal block |
| DE29505046U1 (en) * | 1995-03-24 | 1996-07-18 | Kloeckner Moeller Gmbh | Low-voltage switchgear with touch protection |
| US5831498A (en) * | 1997-04-30 | 1998-11-03 | Eaton Corporation | Molded case circuit breaker with adapter for use with ring lug terminations |
| JP3681576B2 (en) * | 1999-06-02 | 2005-08-10 | 矢崎総業株式会社 | Connector cover mounting structure |
| US6325675B1 (en) * | 2000-01-14 | 2001-12-04 | Ilsco Corporation | Electrical-connector insulating cover having a hinged access cover |
| US6238234B1 (en) * | 2000-02-26 | 2001-05-29 | Marconi Communications, Inc. | Terminal block with reduced dielectric material |
-
2001
- 2001-09-24 CH CH01759/01A patent/CH695404A5/en not_active IP Right Cessation
- 2001-11-08 AT AT01126643T patent/ATE356417T1/en not_active IP Right Cessation
- 2001-11-08 EP EP01126643A patent/EP1296340B1/en not_active Expired - Lifetime
- 2001-11-08 DE DE50112163T patent/DE50112163D1/en not_active Expired - Fee Related
-
2002
- 2002-09-12 US US10/242,501 patent/US6767242B2/en not_active Expired - Fee Related
- 2002-09-24 JP JP2002278190A patent/JP2003178636A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003178636A (en) | 2003-06-27 |
| EP1296340A1 (en) | 2003-03-26 |
| ATE356417T1 (en) | 2007-03-15 |
| US20030068923A1 (en) | 2003-04-10 |
| CH695404A5 (en) | 2006-04-28 |
| US6767242B2 (en) | 2004-07-27 |
| DE50112163D1 (en) | 2007-04-19 |
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