EP1296340A1 - Cover for interconnecting clamps of a multiphase switching device - Google Patents

Cover for interconnecting clamps of a multiphase switching device Download PDF

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Publication number
EP1296340A1
EP1296340A1 EP01126643A EP01126643A EP1296340A1 EP 1296340 A1 EP1296340 A1 EP 1296340A1 EP 01126643 A EP01126643 A EP 01126643A EP 01126643 A EP01126643 A EP 01126643A EP 1296340 A1 EP1296340 A1 EP 1296340A1
Authority
EP
European Patent Office
Prior art keywords
terminal cover
insulating material
cover cap
material housing
leading
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01126643A
Other languages
German (de)
French (fr)
Other versions
EP1296340B1 (en
Inventor
Willy Feller
Hans-Jürgen Dr. Haars
Patrik Kalt
Sandro Liberto
Hans Dr. Weichert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rockwell Automation Switzerland GmbH
Original Assignee
Rockwell Automation AG
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Filing date
Publication date
Application filed by Rockwell Automation AG filed Critical Rockwell Automation AG
Publication of EP1296340A1 publication Critical patent/EP1296340A1/en
Application granted granted Critical
Publication of EP1296340B1 publication Critical patent/EP1296340B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • 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 connection terminals of a multi-phase electrical switching device with in one for all Phases common electrical housing of the switchgear housed electrical Terminals that are used for fastening electrical cables in the connection terminals, which are perpendicular to the cables, accessible from the surface of the insulating material housing via recesses Clamping screws are equipped.
  • EP-A1-0051755 describes a cover device for securing connection terminals known from electrical installation devices.
  • the covering device is approximately L-shaped in cross-section.
  • This cover device is with at least one behind protrusions or recesses on the installation device gripping resilient nose held on the installation device.
  • This cover device serves as protection against contact for the connection terminals and increases the Dielectric strength between the terminals of adjacent phases of the Installation device not.
  • the object of the present invention is to provide a terminal cover for propose the connection terminals of a multi-phase electrical switching device, which increase the dielectric strength between the terminals neighboring phases of the switching device and thus the requirements of different standards, e.g. the USA standard UL508, in terms of dielectric strength between adjacent terminals of an electrical switching device corresponds and is economically advantageous.
  • a terminal cover for propose the connection terminals of a multi-phase electrical switching device, which increase the dielectric strength between the terminals neighboring phases of the switching device and thus the requirements of different standards, e.g. the USA standard UL508, in terms of dielectric strength between adjacent terminals of an electrical switching device corresponds and is economically advantageous.
  • the task is solved in that for securing the electrical Strength between the terminals of adjacent phases, the L-shaped trained, with one leg over the clamp screws leading recesses and with the other leg over to the connection terminals leading terminal openings extending terminal cover on their side facing the insulating material housing in the edge area of the with the connection openings on the insulating housing a negligibly small air gap is tight that the terminal cover on their surface facing away from the insulating housing between the the cap openings leading the connection terminals with protruding, the required Ribs securing creepage is provided.
  • Different norms require testing of the dielectric strength between the neighboring ones Terminals of an electrical switching device.
  • the terminal cover cap can be connected to the finished switching device before connecting the electrical lines can be permanently attached by snap connections.
  • Various Standards require that a terminal cover on the insulating housing must be permanently attached. This is provided by the unsolvable snap connections achieved.
  • the terminal cover cap advantageously has the insulating material housing on it facing side at least one in the insulating housing behind Holding extension and at least one on a projection of the insulating housing snapping nose. This arrangement enables the permanent attachment of the terminal cover to the insulating housing without Screw connection, which is particularly advantageous for relatively small switching devices is.
  • the L-shaped terminal cover cap can be in the area of the connection terminals leading recesses screwed to the insulating housing and with the perpendicular to the leg on the insulating housing with at least one on the insulating housing behind the stop and with at least one attached to a projection of the insulating housing engaging snap nose his.
  • the snap nose that engages the insulating material housing secures the non-detachable Fastening the terminal cover cap to the insulating housing.
  • the terminal cover cap can be inserted into the cavity of the connection terminals have recesses protruding from adjacent phases leading recesses.
  • the recesses in the cavity leading to the connection terminals engaging separation processes 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 in perspective shown.
  • the switchgear with switch contact pieces, contact actuation mechanism and terminals is housed in an insulating housing 1.
  • the electrical lines, not shown, can pass through the connection openings 5, 6, 7 to the connection terminals.
  • the for Attachment of the electrical cables provided in the connection terminals Clamping screws perpendicular to the cables are from the surface of the insulating housing 1 accessible through the cutouts 2, 3, 4.
  • For between the connection terminals on the The surface of the insulating material does not have a creepage distance that is different To maintain the prescribed test voltage. Since it brings in 2, 3 and 4 shown terminal cover 8 remedy.
  • FIGS. 2 and 3 show the terminal cover cap 8 from the side facing away from the insulating material housing 1.
  • FIGS. 2 and 3 show the terminal cover cap 8 from the side facing away from the insulating material housing 1.
  • FIGS. 2 and 3 show the terminal cover cap 8 from the side facing away from the insulating material housing 1.
  • FIGS. 2 and 3 show the terminal cover cap 8 from the side facing away from the insulating material housing 1.
  • FIGS. 2 and 3 show the terminal cover cap 8 from the side facing away from the insulating material housing 1.
  • FIGS. 2 and 3 show the terminal cover cap 8 from the side facing away from the insulating material housing 1.
  • FIGS. 2 and 3 show the terminal cover cap 8 from the side facing away from the insulating material housing 1.
  • FIGS. 2 and 3 show the terminal cover cap 8 from the side facing away from the insulating material housing 1.
  • FIGS. 2 and 3 show the terminal cover cap 8 from the side facing away from the insulating material housing 1.
  • FIGS. 2 and 3 show the terminal cover cap
  • the L-shaped terminal cover cap 8 attached to the switching device extends with one leg over the to the clamping screws leading recesses 2, 3, 4 and with the other leg over to the Terminals leading connection openings 5, 6, 7.
  • Fig.4 you can see two holding extensions 19, 20, which when mounting the terminal cover 8 on the switching device into the holding openings 21 made in the insulating material housing 1 be introduced.
  • At the end of the insertion movement in the direction of arrow 48 grips the snap nose 22 visible in FIG. 4 lying at the end of a groove Projection 23 of the insulating material housing 1 and ensures a permanent connection between the terminal cover 8 and the insulating housing 1.
  • This Inseparable connection is prescribed in various standards.
  • the terminal cover 8 lies with the insulating material housing 1 facing Edge areas of the cap openings 9, 10, 11 at the edge areas of the connection openings 5, 6, 7 of the insulating housing 1 closely. This around Connection openings 5, 6, 7 closely fitting parts of the terminal cover 8 increase the electrical strength between the terminals of the electrical Device detectable, so that in the different regulations required electrical strength between the terminals of an electrical Switching device is accessible using the terminal cover 8.
  • the Partition extensions 24 can have different shapes and accordingly only on part or all of the circumference of the recesses 5, 6, 7 in this protrude.
  • the terminal cover cap 32 shown in FIGS. 6, 7 and 8 is for a larger switching device provided.
  • the basic arrangement is similar to has previously been described for a smaller switching device.
  • the most essential The difference between the two arrangements is that this one Arrangement not only the terminal cover cap 32 on the insulating housing 25 fastened by a snap connection, but also by a screw connection is.
  • the insulating material housing 25 in FIG. 5 also encloses the switch contact pieces, the contact operating mechanism and the terminals.
  • the not shown electrical lines are through the connection openings 29, 30, 31 introduced to the connection terminals and there with the through the recesses 26, 27, 28 accessible clamping screws clamped.
  • Terminal cover cap 32 With the help of Terminal cover cap 32 is also the electrical strength in this arrangement between the terminals increased.
  • terminal cover caps 32 In this arrangement, too, there is between those in FIGS. 6 and 7 shown terminal cover caps 32 only a scale difference.
  • Figure 8 shows this terminal cover cap 32 of the insulator housing 25 facing Page ago. This figure 8 shows the feed to the electrical cables to the cap openings serving the connection terminals 50, 51, 52.
  • the terminal cover 32 is of the Insulated housing opposite side shown.
  • Figures 6, 7 one recognizes the protruding ribs 36, 37, which extend the creepage distance between adjacent terminals and thus to increase the serve electrical strength.
  • the side end ribs 38,39 are too clearly visible.
  • the L-shaped terminal cover cap attached to the switchgear 32 extends with its one leg over to the connection terminals leading connection openings 29, 30, 31. This leg is during assembly the terminal cover cap 32 with the screws 40 on the insulating housing 25 screwed. This leg carries on its facing the insulating housing 25 Side two holding stops 41, 42, which are installed in the two engage on the molded housing 25 formed gaps 43, 44. During installation the terminal cover cap 32 becomes this after the insertion of the holding stops 41, 42 into the gaps 43, 44 in the direction of arrow 49 on the insulating housing 25 pressed until the on the inside of the other leg of the L-shaped terminal cap 32 molded snap 45 behind the am End of a groove lying projection 46 engages. This snap connection secures the inseparable connection between the terminal cover cap 32 and the insulating housing 25. The screws are used to secure the terminal cover cap 32 40, which hold the terminal cover cap 32 on the insulating housing 25.
  • the terminal cover cap 32 also lies with the insulating material housing 25 facing edge areas of the cap openings 50, 51, 52 at the edge areas the connection openings 29, 30, 31 of the insulating housing 25 closely.
  • the closely spaced insulating material parts increase between the connection terminals of the electrical switching device in comparison to the electrical strength with electrical strength without terminal cover cap 32.
  • the arm 47 of the terminal cap provided with a positioning pin 32 only serves as an assembly aid.
  • Terminal cover caps 8 and 32 on both connection sides of a symmetrical trained electrical switching device can be installed.

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Motor Or Generator Frames (AREA)
  • Breakers (AREA)

Abstract

The terminal cover cap (8) has protruding fins (15,16) ensuring the required creep distance and ensuring the required electric strength between the terminals of adjacent phases arranged on its surface facing away from an insulating housing (1) of a switch and located between cap openings (9-11) leading to connection terminals.

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 connection terminals of a multi-phase electrical switching device with in one for all Phases common electrical housing of the switchgear housed electrical Terminals that are used for fastening electrical cables in the connection terminals, which are perpendicular to the cables, accessible from the surface of the insulating material housing via recesses Clamping screws are equipped.

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.EP-A1-0051755 describes a cover device for securing connection terminals known from electrical installation devices. The covering device is approximately L-shaped in cross-section. This cover device is with at least one behind protrusions or recesses on the installation device gripping resilient nose held on the installation device. This cover device serves as protection against contact for the connection terminals and increases the Dielectric strength between the terminals of adjacent phases of the Installation device not.

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 provide a terminal cover for propose the connection terminals of a multi-phase electrical switching device, which increase the dielectric strength between the terminals neighboring phases of the switching device and thus the requirements of different standards, e.g. the USA 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 task is solved in that for securing the electrical Strength between the terminals of adjacent phases, the L-shaped trained, with one leg over the clamp screws leading recesses and with the other leg over to the connection terminals leading terminal openings extending terminal cover on their side facing the insulating material housing in the edge area of the with the connection openings on the insulating housing a negligibly small air gap is tight that the terminal cover on their surface facing away from the insulating housing between the the cap openings leading the connection terminals with protruding, the required Ribs securing creepage is provided. Different norms require testing of the dielectric strength between the neighboring ones Terminals of an electrical switching device. The usual one Creepage distance on the surface of the between the connection terminals In exceptional cases, lying insulation material is not sufficient, the prescribed Maintain test voltage. The fact that the terminal cover cap on her the side facing the insulating material housing in the edge area of the connection terminals leading connection openings on the insulating material housing with a negligible a small air gap creates a barrier that is one of different test regulations can hold higher test voltage than that same route without the terminal cover cap attached. This measure enables increasing the dielectric strength between adjacent terminals, without increasing the creepage distance by enlarging the insulating material housing would be extended. On the side of the terminal cover facing away from the insulating housing there is enough space for attaching ribs, so that on this side the creepage distance through the between the to the connection terminals leading cap openings with the attached ribs of the test voltage is increased 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 cap can be connected to the finished switching device before connecting the electrical lines can be permanently attached by snap connections. Various Standards require that a terminal cover on the insulating housing must be permanently attached. This is provided by the unsolvable snap connections achieved.

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 cap advantageously has the insulating material housing on it facing side at least one in the insulating housing behind Holding extension and at least one on a projection of the insulating housing snapping nose. This arrangement enables the permanent attachment of the terminal cover to the insulating housing without Screw connection, which is particularly advantageous for relatively small switching devices is.

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 in the area of the connection terminals leading recesses screwed to the insulating housing and with the perpendicular to the leg on the insulating housing with at least one on the insulating housing behind the stop and with at least one attached to a projection of the insulating housing engaging snap nose his. The snap nose that engages the insulating material housing secures the non-detachable Fastening 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 can be inserted into the cavity of the connection terminals have recesses protruding from adjacent phases leading recesses. The recesses in the cavity leading to the connection terminals engaging separation processes 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.
The invention is described in more detail below with reference to the accompanying drawings. Show it:
Fig.1
the perspective view of a relatively small electrical switching device without terminal cover,
Fig.2
a matching terminal cover cap
Figure 3
the terminal cover shown in Fig.2 seen in a different scale from the side facing away from the switching device and
Figure 4
seen 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 cap,
Figure 7
the terminal cover cap shown in FIG. 6 seen in a different scale from the side facing away from the switching device and
Figure 8
seen from the side facing the switching device.

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 Fig.1 a relatively small electrical switching device is in perspective shown. The switchgear with switch contact pieces, contact actuation mechanism and terminals is housed in an insulating housing 1. The electrical lines, not shown, can pass through the connection openings 5, 6, 7 to the connection terminals. The for Attachment of the electrical cables provided in the connection terminals Clamping screws perpendicular to the cables are from the surface of the insulating housing 1 accessible through the cutouts 2, 3, 4. For between the connection terminals on the The surface of the insulating material does not have a creepage distance that is different To maintain the prescribed test voltage. Since it brings in 2, 3 and 4 shown terminal cover 8 remedy.

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.To show the design of the terminal cover 8 in detail, in Figures 2 and 3, the same terminal cover 8 in another Scale shown. These FIGS. 2 and 3 show the terminal cover cap 8 from the side facing away from the insulating material housing 1. In these figures are through the recesses 5, 6, 7 to the terminals, not shown leading recesses 9, 10, 11 and between the good in Fig.4 visible cap openings 12, 13, 14 lying, multilayer ribs 15, 16 good to see. 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 end of the terminal cover cap 8.

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 terminal cover cap 8 attached to the switching device extends with one leg over the to the clamping screws leading recesses 2, 3, 4 and with the other leg over to the Terminals leading connection openings 5, 6, 7. In Fig.4 you can see two holding extensions 19, 20, which when mounting the terminal cover 8 on the switching device into the holding openings 21 made in the insulating material housing 1 be introduced. At the end of the insertion movement in the direction of arrow 48 grips the snap nose 22 visible in FIG. 4 lying at the end of a groove Projection 23 of the insulating material housing 1 and ensures a permanent connection between the terminal cover 8 and the insulating housing 1. This Inseparable connection is prescribed in various standards.

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 terminal cover 8 lies with the insulating material housing 1 facing Edge areas of the cap openings 9, 10, 11 at the edge areas of the connection openings 5, 6, 7 of the insulating housing 1 closely. This around Connection openings 5, 6, 7 closely fitting parts of the terminal cover 8 increase the electrical strength between the terminals of the electrical Device detectable, so that in the different regulations required electrical strength between the terminals of an electrical Switching device is accessible using the terminal cover 8.

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.To the dielectric strength between those in the insulating housing 1 To increase the connection terminals, there are 8 separation extensions on the terminal cover cap 24 formed in the recesses in the insulating housing 1 5, 6, 7 protrude and thus contribute to the extension of the creepage distance. The Partition extensions 24 can have different shapes and accordingly only on part or all of the circumference of the recesses 5, 6, 7 in this protrude.

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 terminal cover cap 32 shown in FIGS. 6, 7 and 8 is for a larger switching device provided. The basic arrangement is similar to has previously been described for a smaller switching device. The most essential The difference between the two arrangements is that this one Arrangement not only the terminal cover cap 32 on the insulating housing 25 fastened by a snap connection, but also by a screw connection is.

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 material housing 25 in FIG. 5 also encloses the switch contact pieces, the contact operating mechanism and the terminals. The not shown electrical lines are through the connection openings 29, 30, 31 introduced to the connection terminals and there with the through the recesses 26, 27, 28 accessible clamping screws clamped. With the help of Terminal cover cap 32 is also the electrical strength in this arrangement between the terminals increased.

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.In this arrangement, too, there is between those in FIGS. 6 and 7 shown terminal cover caps 32 only a scale difference. Figure 8 shows this terminal cover cap 32 of the insulator housing 25 facing Page ago. This figure 8 shows the feed to the electrical cables to the cap openings serving the connection terminals 50, 51, 52. In Figures 6 and 7, the terminal cover 32 is of the Insulated housing opposite side shown. In Figures 6, 7 one recognizes the protruding ribs 36, 37, which extend the creepage distance between adjacent terminals and thus to increase the serve electrical strength. The side end ribs 38,39 are too clearly visible.

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 terminal cover cap attached to the switchgear 32 extends with its one leg over to the connection terminals leading connection openings 29, 30, 31. This leg is during assembly the terminal cover cap 32 with the screws 40 on the insulating housing 25 screwed. This leg carries on its facing the insulating housing 25 Side two holding stops 41, 42, which are installed in the two engage on the molded housing 25 formed gaps 43, 44. During installation the terminal cover cap 32 becomes this after the insertion of the holding stops 41, 42 into the gaps 43, 44 in the direction of arrow 49 on the insulating housing 25 pressed until the on the inside of the other leg of the L-shaped terminal cap 32 molded snap 45 behind the am End of a groove lying projection 46 engages. This snap connection secures the inseparable connection between the terminal cover cap 32 and the insulating housing 25. The screws are used to secure the terminal cover cap 32 40, which hold the terminal cover cap 32 on the insulating housing 25.

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 terminal cover cap 32 also lies with the insulating material housing 25 facing edge areas of the cap openings 50, 51, 52 at the edge areas the connection openings 29, 30, 31 of the insulating housing 25 closely. The closely spaced insulating material parts increase between the connection terminals of the electrical switching device in comparison to the electrical strength with electrical strength without terminal cover cap 32.

Der mit einem Positionierungsstift versehene Arm 47 der Klemmenabdeckkappe 32 dient nur als Montagehilfe.The arm 47 of the terminal cap provided with a positioning pin 32 only serves as an assembly aid.

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.Another advantage of the arrangements described is that the Terminal cover caps 8 and 32 on both connection sides of a symmetrical trained electrical switching device can be installed.

Claims (5)

Klemmenabdeckkappe (8, 32) für die Anschlussklemmen eines mehrphasigen elektrischesn Schaltgerätes mit in einem für alle Phasen gemeinsamen Isolierstoffgehäuse (1, 25) 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 (1, 25) über Aussparungen (2, 3, 4, 26, 27, 28) zugänglichen Klemmschrauben ausgerüstet sind, dadurch gekennzeichnet, 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 (2, 3, 4, 26, 27, 28) und mit dem anderen Schenkel über die zu den Anschlussklemmen führenden Anschlussöffnungen (5, 6, 7, 29, 30, 31) erstreckende Klemmenabdeckkappe (8, 32) an ihrer dem Isoliestoffgehäuse (1, 25) zugekehrten Seite im Randbereich der zu den Anschlussklemmen führenden Anschlussöffnungen (5, 6, 7, 29, 30, 31) mit einem vernachlässigbar kleinen Luftspalt eng anliegt, dass die Klemmenabdeckkappe (8, 32) an ihrer dem Isolierstoffgehäuse (1, 25) abgekehrten Oberfläche zwischen den zu den Anschlussklemmen führenden Kappenöffnungen (9, 10, 11, 50, 51, 52) mit vorstehenden, den erforderlichen Kriechweg sicherden Rippen (15, 16, 36, 37) versehen ist.Terminal cover cap (8, 32) for the connection terminals of a multi-phase electrical switching device with electrical connection terminals housed in an insulating material housing (1, 25) of the switching device which is common to all phases and which are used for fastening electrical lines in the connection terminals and are perpendicular to the lines , from the surface of the insulating housing (1, 25) via recesses (2, 3, 4, 26, 27, 28) accessible clamping screws, characterized in that to ensure the electrical strength between the terminals of adjacent phases, the L-shaped trained, with one leg over the recesses leading to the clamping screws (2, 3, 4, 26, 27, 28) and with the other leg over the connection openings leading to the connecting terminals (5, 6, 7, 29, 30, 31) extending terminal cover (8, 32) on its side facing the insulating material housing (1, 25) in the edge region of the connection openings (5, 6, 7, 29, 30, 31) leading to the connection terminals with a negligibly small air gap that the terminal cover (8, 32) faces away from the insulating material housing (1, 25) between the surface of the connection terminals leading cap openings (9, 10, 11, 50, 51, 52) is provided with protruding ribs (15, 16, 36, 37) securing the necessary creepage distance. Klemmenabdeckkappe nach Anspruch 1, dadurch gekennzeichnet, dass die Klemmenabdeckkappe (8, 32) am fertigen Schaltgerät vor dem Anschluss der elektrischen Leitungen durch Schnappverbindungen unlösbar angebracht ist.Terminal cover cap according to claim 1, characterized in that the terminal cover cap (8, 32) is attached to the finished switching device before the electrical lines are connected by snap connections. Klemmenabdeckkappe nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die Klemmenabdeckkappe (8) an ihrer dem Isolierstoffgehäuse (1) zugekehrten Seite mindestens einen im Isolierstoffgehäuse (1) hintergreifende Haltefortsatz (19, 20) und mindestens eine an einem Vorsprung (23) des Isolierstoffgehäuses (1) hintergreifende Schnappnase (22) aufweist.Terminal cover cap according to one of claims 1 to 2, characterized in that the terminal cover cap (8) on its side facing the insulating material housing (1) has at least one holding extension (19, 20) engaging behind the insulating material housing (1) and at least one on a projection (23) of the insulating material housing (1) engaging behind snap nose (22). Klemmenabdeckkappe nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die L-förmige Klemmenabdeckkappe (32) im Bereich der zu den Anschlussklemmen führenden Aussparungen (29, 30, 31) am Isolierstoffgehäuse (25) angeschraubt und mit dem senkrecht dazu stehenden Schenkel am Isolierstoffgehäuse (25) mit mindestens einem am Isolierstoffgehäuse (25) hintergreifenden Halteanschlag (41, 42) und mit mindestens einer an einem Vorsprung (46) des Isolierstoffgehäuses (25) angreifenden Schnappnase (45) befestigt ist.Terminal cover cap according to one of claims 1 to 2, characterized in that the L-shaped terminal cover cap (32) is screwed to the insulating material housing (25) in the region of the cutouts (29, 30, 31) leading to the connection terminals and with the leg perpendicular to it Insulating material housing (25) is fastened with at least one retaining stop (41, 42) engaging behind the insulating material housing (25) and with at least one snap nose (45) engaging on a projection (46) of the insulating material housing (25). Klemmenabdeckkappe nach einem der Ansprüche 1 bis 4, dadurch gekennzechnet, dass die Klemmenabdeckkappe (8) in den Hohlraum der zu den Anschlussklemmen benachbarter Phasen führenden Aussparungen (5, 6, 7) hineinragende Trennfortsätze (24) aufweist.Terminal cover cap according to one of claims 1 to 4, characterized in that the terminal cover cap (8) has separating extensions (24) projecting into the cavity of the cutouts (5, 6, 7) leading to the connecting terminals of adjacent phases.
EP01126643A 2001-09-24 2001-11-08 Cover for interconnecting clamps of a multiphase switching device Expired - Lifetime EP1296340B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01759/01A CH695404A5 (en) 2001-09-24 2001-09-24 Terminal cover for the terminals of a multiphase electrical switching device.
CH17592001 2001-09-24

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EP1296340A1 true EP1296340A1 (en) 2003-03-26
EP1296340B1 EP1296340B1 (en) 2007-03-07

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EP01126643A Expired - Lifetime EP1296340B1 (en) 2001-09-24 2001-11-08 Cover for interconnecting clamps of a multiphase switching device

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US (1) US6767242B2 (en)
EP (1) EP1296340B1 (en)
JP (1) JP2003178636A (en)
AT (1) ATE356417T1 (en)
CH (1) CH695404A5 (en)
DE (1) DE50112163D1 (en)

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FR2870636A1 (en) * 2004-05-19 2005-11-25 Fuji Elec Fa Components & Sys CIRCUIT BREAKER AND TERMINAL COVER
WO2012013442A1 (en) * 2010-07-28 2012-02-02 Siemens Aktiengesellschaft Terminal assembly for a power switch in tension spring technology
DE102011082191A1 (en) * 2011-09-06 2013-03-07 Siemens Aktiengesellschaft Insulation device for electrical insulation of electrical terminal of e.g. circuit breaking switch, has insulation cap formed with base body over hinge such that cap is movable relative to base body to enable access to screw if necessary
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US8169283B2 (en) * 2010-03-03 2012-05-01 Schneider Electric USA, Inc. Circuit breaker trip unit support
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

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FR2870636A1 (en) * 2004-05-19 2005-11-25 Fuji Elec Fa Components & Sys CIRCUIT BREAKER AND TERMINAL COVER
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WO2012013442A1 (en) * 2010-07-28 2012-02-02 Siemens Aktiengesellschaft Terminal assembly for a power switch in tension spring technology
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DE102011082191A1 (en) * 2011-09-06 2013-03-07 Siemens Aktiengesellschaft Insulation device for electrical insulation of electrical terminal of e.g. circuit breaking switch, has insulation cap formed with base body over hinge such that cap is movable relative to base body to enable access to screw if necessary
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Also Published As

Publication number Publication date
CH695404A5 (en) 2006-04-28
JP2003178636A (en) 2003-06-27
ATE356417T1 (en) 2007-03-15
US6767242B2 (en) 2004-07-27
EP1296340B1 (en) 2007-03-07
US20030068923A1 (en) 2003-04-10
DE50112163D1 (en) 2007-04-19

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