DE102014118759B4 - Installation switching device with two connection terminals of different types on one side of the housing - Google Patents

Abstract

Service switching device (1, 1 '), which has a housing (2) with a front side (3), a narrow side (4) and a terminal connection space (5) on the narrow side (4); two connection terminals (6, 7, 8) of different terminal types for connecting two connection conductors (9) are accommodated in the terminal connection compartment (5); the terminal connection compartment (5) has a first terminal insertion opening (10), one in the terminal connection compartment (5) of the housing (2) a fixed first connection terminal (6) of the screwless spring-type terminal for connecting a first connection conductor is provided, with a first clamping spring (11) and a first spring-actuating lever that can be actuated from outside the housing (2) and pivotably connected to the housing (2) (12), with a support part (14) comprising a first clamping strip (13), the first clamping spring (11) having a contact leg (15), a clamping leg (16) with a clamping window comprising a clamping edge and a contact and clamping leg ( 15, 16) comprises curved spring back (17) connecting, and wherein the first clamping spring (11) cooperates with the first clamping strip (13) such that a first connection conductor inserted through the first terminal insertion opening (10) can be clamped between the rear side of the first clamping strip (13) and the clamping edge of the clamping window, and a second terminal insertion opening (18) is present in the terminal connection space (5) and the carrier part (14) a second clamping strip (19) to which a clamping frame (20, 20 ') of a second connecting terminal (7, 8) of a different type is coupled for connecting a second connecting conductor (9) introduced through the second terminal insertion opening (18); the first and the second terminal insertion opening (10, 18) are arranged one behind the other on a narrow side (4) and seen from the front side (3); the second connection terminal (8) is of the type of a spring-type terminal; the spring-type terminal (8) is a U or Ω -shaped second clamping spring (23) with a second clamping leg (24), a fastening leg (25) and a second clamping leg (24) with the fastening leg (25) verbi ndenden bend (26), and a second clamping frame (20 '), which has a recess for receiving a second connection conductor (9), wherein the fastening leg (25) is connected to a first end (27) of the second clamping frame (20') is, and the free spring end (28) of the second clamping leg (24) interacts with a second connecting conductor (9) in a clamping manner; and wherein there is a second spring actuation lever (30), which can be actuated from outside the housing (2) and is pivotably connected to the housing (2), for actuating the spring plug-in terminal (8).

Description

The invention is based on a service switching device which has a housing with a front side, a narrow side and a terminal connection space on the narrow side.

Such an installation switching device is, for example, a neutral conductor switching device for baying onto a phase switching device in an installation distribution.

In a low-voltage power distribution system, protective devices are used to protect against faulty line conditions, for example line circuit breakers. Miniature circuit breakers protect the lines they monitor in the event of overload currents and short-circuit currents. These protective devices also enable manual switch actuation for switching on or off under load or without load. When switching off manually under load, one speaks of disconnecting downstream system parts from the power supply. A circuit breaker can therefore be used for disconnection and protection. Such a switching device that protects a line can therefore also be referred to as a protected pole or a single-pole switching protective device. A switching device that protects and switches a phase line is also referred to as a phase switching device in connection with the present invention. A switching device that does not have the protective function but only the switching function is also referred to as a switching pole or a disconnector. A switching device that is used in a low-voltage power distribution without a protective function to disconnect the neutral conductor is referred to here as a neutral conductor switching device.

In three-phase low-voltage power distributions, 3-pole switching or 4-pole switching protective devices are usually used for protection and disconnection, depending on the requirements. For example, 3-pole circuit breakers for protecting the three phase conductors are known, which switch all 3 phase conductors of a three-phase power supply network practically simultaneously, both in the event of manual switching operation and in the event of a fault by automatic shutdown.

There are also 4-pole miniature circuit breakers that switch all 3 phase conductors and the associated neutral conductor of a three-phase power network with neutral conductor practically simultaneously, both in the event of manual switching operation and in the event of a fault by automatic shutdown. There are 4 protected poles. The protective function is not used in this application for the line circuit breaker that switches the neutral conductor, as it is not required for the neutral conductor. The switching device that switches the neutral conductor is also referred to as a neutral conductor switching device in connection with the present invention.

Another embodiment is the combination of a 3-pole circuit breaker with a so-called neutral conductor isolator. There are 3 protected poles with a switching neutral conductor pole without a protective function. This unit enables the neutral conductor to be disconnected accordingly.

If only a single-phase circuit is to be protected, it is known that a phase switching device for protecting and switching the phase line is combined with a neutral conductor switching device for disconnecting the neutral conductor.

For several years now, selective main line circuit breakers (SH switches, also simply called selective line circuit breakers) have been used as disconnectors and for selective overcurrent protection in main distributions, e.g. B. meter cabinets are used. Single-pole switching devices, which are assembled into a so-called 3-block, are often used - even in multi-phase circuits.

In a meter cabinet, the selective circuit breakers are arranged in front of the meter, i.e. between the building connection point with the connection fuse and the input terminals of the electricity meter.

In a low-voltage network implemented as a so-called TT system, the protective conductor connected to the electrically conductive housing of the equipment in the consumer system is separately connected to its own earth electrode. This is separated from the plant earth in the distribution network. At least one phase line L1, L2 or L3 and the neutral conductor N are fed to the individual equipment as an electrical consumer. Accordingly, in a building installation according to the TT system, a four-core main line runs from the building connection point to the electricity meter, with the three phases L1, L2, L3 and the neutral conductor N. Each of the phases L1, L2 and L3 is protected with a selective circuit breaker. The neutral conductor can be switched on and off with a neutral conductor isolator. With its output terminals, the electricity meter is connected via a four-wire line with the three phases L1, L2, L3 and the neutral conductor N to the circuit distributor, the sub-distribution to the individual circuits of the building. In the sub-distribution, the circuit distributor, it is divided into individual consumer circuits, with each consumer circuit comprising one of the phases L1, L2 or L3 as the forward conductor to the consumer and the neutral conductor N as the return conductor. The PE Conductor is laid as a single-core line from the circuit distributor to a main earthing rail of the building. Each consumer circuit is individually protected, for example with a line circuit breaker and / or a fault current circuit breaker.

If a short-circuit occurs between the phase and the neutral conductor in one of the downstream consumer circuits, a high short-circuit current flows, which flows on the meter input side via the selective circuit breaker assigned to the affected phase L1, L2 or L3 and the neutral conductor isolator. The selective circuit breaker is designed so that it does not interrupt the flow of current through the affected phase line on the meter input side for a certain period of time, the so-called selective time, in order to give the residual current circuit breaker assigned to the affected consumer line the opportunity to switch off the short circuit. Only if this does not happen within the preset selective time does the selective circuit breaker assigned to the affected phase line switch off the affected phase line on the meter input side. Then all consumer circuits downstream of this phase line are switched off, including those in which no short-circuit had occurred. During the selective time, the high short-circuit current flows both through the neutral conductor isolator and through the selective circuit breaker assigned to the phase concerned.

It is possible to use a neutral conductor switching device from a selective line circuit breaker, such as the one in the DE 10 2008 017 472 A1 is described, by removing the two thermal overcurrent releases in the main and secondary current path from the selective miniature circuit breaker. The other assemblies and the arrangement with the main and auxiliary current path are retained for use as a neutral conductor switching device.

A neutral conductor switch implemented in this way is connected on the access side, on its input side, via an access screw terminal with an access conductor or via a contact rail to busbars in the installation distributor. For the meter connection on the output side, the neutral conductor switched with the neutral conductor switch implemented in this way is connected to a screwless spring-loaded output terminal of the neutral conductor switch, which includes an externally operated terminal operating lever. A screwless spring-loaded output terminal with an actuating lever has the advantage of simple and time-saving connection of the neutral conductor and simple and time-saving operability. However, a screwless spring-loaded output terminal with an actuating lever is limited in terms of the cross-sectional size of the neutral conductor to be connected. If the selective line circuit breaker assigned to the neutral conductor switch is to be able to carry high currents, a correspondingly large conductor cross-section of the neutral conductor is also required, for example 16 mm ² . A neutral conductor with such a large conductor cross-section can be connected to a screwless spring-loaded output terminal with an actuating lever. In TT networks, however, a switched neutral conductor is also required for the system operator’s network, not just to supply the meter. It is therefore necessary to connect two neutral conductors with a large cross section to the neutral conductor switch on the output side. One of the two neutral conductors is used to supply the meter. The second neutral conductor is fed directly to the circuit distributor, bypassing the meter. For structural reasons, however, a second neutral conductor with a large cross-section cannot be connected to a screwless spring-loaded output terminal, also because the actuation force to be applied for the terminal actuation lever would then be too great for manual actuation and the spring actuation lever would have to be made so massive that it would would exceed the space required on or in the device. There is no space for a second screwless spring-loaded output terminal in the terminal receiving area of the neutral conductor switching device, since its geometric dimensions are limited by relevant known standards.

The DE 199 34 550 A1 describes a contact element with a combination of a screw terminal and a spring terminal. The contact element is intended for several, optionally different conductor cross-sections.

The DE 201 01 435 U1 describes an electrical device in which a connection for a single wire end piece and a connection for a busbar flag are provided on one narrow side. The connection for the busbar lug has an inclined piece acted upon by a spring, which can be pushed back by means of the lug by means of an actuating lever against the force of the spring for simple insertion of the busbar lug.

The DE 10 2010 033 112 A1 describes an electrical installation device that has a spring terminal and a screw terminal. Furthermore, the housing has a guide contour in order to guide the busbar in a mounting position when it is inserted into the spring terminal at a defined first angle relative to the housing.

The DE 299 16 001 U1 describes an installation switch with a connection point for a cross wiring and a conductor wire, with a screw terminal for the conductor wire and for the Cross wiring in the form of a busbar arrangement a plug-in terminal are provided. The plug-in terminal is closer to the fastening side than the screw terminal.

The DE 35 04 317 A1 describes a clamp for electrical conductors which has combined means for clamping by means of a clamping screw on the one hand and for clamping by means of a clamping spring on the other hand.

The DE 100 23 851 A1 describes a connection terminal with at least one receiving means for a base contact element for a screw connection, the use of both screw and clamping technology being possible. A module can have two clamp connections or a combination of a screw and a clamp connection.

The DE 10 2008 017 738 A1 describes an installation device with a screwless spring-loaded terminal and a spring actuating lever which can be actuated from outside the housing and through which a clamping window can release a clamping opening for inserting the connecting conductor.

The DE 20 2014 101 570 U1 describes a clamping spring with a first leg which has a main section having a window and a free end section which adjoins the main section and is angled to the main section. A secure and stable positioning of the clamping spring on a busbar can be achieved by means of the clamping spring and a contact unit having the clamping spring.

It is therefore the object of the present invention to improve a service switching device, which has a housing with a front side, a narrow side and a terminal connection space on the narrow side, so that two outgoing conductors with a large cross section can also be connected to the device. if the connection terminal used on the output side does not permit the connection of two connection conductors for structural reasons.

The object is achieved according to the invention by the surprising technical teaching found in contradiction to all previously known connection terminal arrangements in service switching devices that two connection terminals of different terminal types for connecting two connection conductors with a large cross section are accommodated in the terminal connection space. The advantage of the solution according to the invention is that a type of terminal can be selected for the second connection terminal which, with a reduced space requirement, enables a second connection conductor with a conductor cross-section as large as that of the first connection conductor.

In an exemplary advantageous embodiment of the invention, the terminal connection space has a first terminal insertion opening, a first connection terminal of the screwless spring-type terminal fixed in position in the terminal connection space of the housing for connecting a first connection conductor, with a clamping spring and one that can be actuated from outside the housing and with the Housing pivotably connected first spring actuating lever, with a carrier part comprising a first clamping strip, the clamping spring comprising a contact leg, a clamping leg with a clamping window comprising a clamping edge and a curved spring back connecting the contact and clamping legs, and wherein the clamping spring cooperates with the first clamping strip that a first connection conductor introduced through the first terminal insertion opening can be clamped between the rear side of the clamping strip and the clamping edge of the clamping window, and wherein in the terminal connection Closing space a second terminal insertion opening is present and the carrier part has a second clamping strip to which a clamping frame of a second connection terminal of a different type is coupled for connecting a second connection conductor inserted through the second terminal insertion opening.

The advantage of this is the low cost of modifying the existing neutral conductor isolator. The existing carrier part with the first clamping strip for the first screwless spring-loaded terminal with actuating lever is supplemented by a second clamping strip which is attached to the carrier part. The spatial arrangement of the first connection terminal remains unaffected.

According to an advantageous embodiment, the first and the second terminal insertion opening are arranged one behind the other on a narrow side and viewed from the front side. This is a space-saving solution, taking into account the limitation of the width of the neutral conductor switch due to existing standards and installation guidelines.

According to an advantageous embodiment of the invention, the second connection terminal is of the screw terminal type. In an advantageous manner, a screw terminal allows a neutral conductor with a large conductor cross-section to be securely connected while requiring little overall space.

According to an advantageous embodiment of the invention, the second connection terminal has a clamping screw and a first clamping frame, the second connection conductor between the first clamping frame and the second clamping strip can be clamped by means of the clamping screw. This is a type of screw terminal that is easy to implement, with a displaceably mounted clamping frame, on one narrow side of which there is an upper web with a threaded opening through which the clamping screw is guided. The clamping screw is supported on the upper side of the first clamping strip, and when the clamping screw is tightened it pulls the clamping frame upwards in the direction of the first clamping strip, so that the neutral conductor can be clamped between the lower web of the clamping frame and the underside of the first clamping strip .

According to an advantageous embodiment of the invention, the second connection terminal is of the type of a spring plug-in terminal. A spring-loaded terminal can also be designed in such a way that a neutral conductor with a large conductor cross-section can be safely connected if less space is required.

According to an advantageous embodiment of the invention, the spring plug-in terminal has a U-shaped or Ω-shaped clamping spring with a clamping leg, a fastening leg and a curved piece connecting the clamping leg to the fastening leg, and a second clamping frame which has a recess for receiving a second connection conductor, the Fastening leg is connected to a first end of the second clamping frame, and the free spring end of the clamping leg interacts with a second connection conductor in a clamping manner.

According to an advantageous embodiment of the invention, the longitudinal direction of the second clamping strip is oriented towards the second clamp insertion opening, and the second clamping frame is coupled to one end of the recess on the second clamping strip, the free spring end of the clamping leg with the second inserted into the recess , Connecting conductor this interacts clamping the second clamping strip. The coupling can take place in that the second clamping frame is positively or positively and cohesively connected to the second clamping strip, for example as welded or screwed, or also produced in one piece as a correspondingly shaped stamped and bent part.

According to an advantageous embodiment of the invention, the second clamping frame is oriented with its longitudinal direction perpendicular to the longitudinal direction of the second clamping strip. This is very space-saving. When the second connection conductor is inserted through the recess, it then automatically lies parallel to the second clamping strip and can easily and securely be pressed against the second clamping strip by the clamping end of the clamping spring without slipping.

According to an advantageous embodiment of the invention, there is a second spring actuation lever, which can be actuated from outside the housing and is pivotably connected to the housing, for actuating the spring plug-in terminal. This is advantageous if the second connection conductor is designed as a stranded conductor, for example, so that the spring-loaded terminal must be opened when inserting it, but the use of an additional tool to open the spring-loaded terminal should be avoided, and to remove a connection conductor plugged into the spring-loaded terminal without tools, be it a rigid conductor or a stranded conductor.

According to an advantageous embodiment of the invention, the pivoting direction of the second spring actuating lever when opening the spring plug-in terminal is oriented from the narrow side in the direction of the interior of the housing. This enables a space-saving arrangement in addition to the first operating lever already present for the first spring-loaded connection terminal.

Further advantageous refinements and improvements of the invention and further advantages can be found in the subclaims.

• Die Figuren und deren Beschreibung dienen dem besseren Verständnis des Gegenstandes der Erfindung. Baugruppen, Teile, Gegenstände oder Teile von Baugruppen oder Gegenständen, die im Wesentlichen gleich oder ähnlich sind oder eine gleiche oder ähnliche Funktion haben, können mit denselben Bezugszeichen versehen sein. Die Figuren zeigen Ausführungsformen der Erfindung in einer schematischen und exemplarischen Weise.

Character description:

• The figures and their description serve for a better understanding of the subject matter of the invention. Assemblies, parts, objects or parts of assemblies or objects that are essentially the same or similar or have the same or similar function can be provided with the same reference symbols. The figures show embodiments of the invention in a schematic and exemplary manner.

• 1 als Beispiel für ein erfindungsgemäßes Installationsschaltgerät ein aus einem selektiven Leitungsschutzschalter abgeleitetes Neutralleiter-Schaltgerät ,
• 2 eine perspektivische Ansicht auf die Abgangsseite des Installationsschaltgerätes nach 1, in einer Ausführungsform nach dem Stand der Technik mit einer zweiten Abgangsklemme vom Typ Schraubklemme,
• 3 eine frontale Aufsicht auf die Abgangsseite des Installationsschaltgerätes nach 2,
• 4 eine Einsicht in den abgangsseitigen Klemmenaufnahmeraum des Installationsschaltgerätes nach 3,
• 5 eine perspektivische Ansicht auf die Abgangsseite des Installationsschaltgerätes nach 1, in einer erfindungsgemäßen Ausführungsform mit einer zweiten Abgangsklemme vom Typ Federsteckklemme,
• 6 eine frontale Einsicht in den abgangsseitigen Klemmenaufnahmeraum des
• Installationsschaltgerätes nach 5,
• 7 eine perspektivische Einsicht in den abgangsseitigen Klemmenaufnahmeraum des Installationsschaltgerätes nach 5,
• 8 ein schematisches Blockschaltbild des Installationsschaltgerätes nach 1.

Show it:

• 1 as an example of an installation switching device according to the invention, a neutral conductor switching device derived from a selective line circuit breaker,
• 2 a perspective view of the output side of the service switching device according to 1 , in an embodiment according to the prior art with a second output terminal of the screw terminal type,
• 3 a front view of the exit side of the service switchgear 2 ,
• 4th an insight into the terminal receiving space of the service switching device on the output side 3 ,
• 5 a perspective view of the output side of the service switching device according to 1 , in an embodiment according to the invention with a second output terminal of the spring-loaded terminal type,
• 6th a front view of the terminal receiving area of the
• Installation switchgear 5 ,
• 7th a perspective view of the terminal receiving space of the service switching device on the output side 5 ,
• 8th a schematic block diagram of the service switching device according to 1 .

In the figures, elements or assemblies that are the same or have the same effect are denoted by the same reference numbers.

For the use of selective line circuit breakers in power distribution networks, there are applications for switching and disconnecting the N conductor. For this purpose, 1-pole switching selective miniature circuit breakers are combined with a neutral conductor switching device. The neutral conductor switching device is an unprotected pole without a release, the switching mechanism of which is coupled in a special way with a protected pole (or 3 protected poles).

The 1 shows such a neutral conductor switching device 1 . This in 1 shown housing 2 of the device 1 des corresponds to that which is used with a selective line circuit breaker sold as a product by the applicant. The 8th shows a schematic block diagram of the service switching device according to 1 . The housing shape in 2 is simplified compared to that in FIG 1 shown shape of the housing 2 . Because of the schematic representation in 8th compared to 1 will be in 8th the same reference numbers are used as in 1 , but with an apostrophe.

The device 1 or. 1' has a housing 2 or. 2 ' made of insulating material, with a front 3 , one narrow side 4th and on the narrow side 4th a terminal compartment, see reference number 5 ' in 8th . In the terminal connection area 5 are two connection terminals 6 ' , 7 ' different terminal types for connecting two connecting conductors.

The neutral conductor switching device 1 after 1 or. 1' after 8th is derived from a selective circuit breaker, among other things by omitting the two thermal overcurrent releases inside, see below.

It'll now follow the scheme 8th explained. On a front 3 ' of the insulating housing 2 ' there is a switch handle 22 ' for manual switching on and off. At the in the 8th narrow side shown on the left 4 ' there are two first connection terminals 6 ' , 7 ' . Both are electrically connected to each other. They enable the connection of two neutral conductor connection conductors. At the in the 8th narrow side shown on the right 4a ' there is a connection terminal 6a ' (or 6a in 1 ) for the connection of a neutral conductor connection conductor.

If the neutral conductor switching device is used as intended, according to 1 or. 8th the device is connected to the connection terminal 6a` or 6a via an access conductor on the input side. The connection terminal 6a or. 6a ' is therefore also referred to below as an access terminal 6a or access clamp 6a ' designated.

At the connection terminals 6 ' , 7 ' or. 6th , 7th the device or the neutral conductor that is routed through the device and is switchable in the device is connected on the output side to the meter or, bypassing the meter, directly to the neutral conductor in the downstream consumer system. The connection terminals 6 ' , 7 ' or. 6th , 7th , 8th (see the 2 to 7th ) are therefore also referred to below as output terminals. Between the access clamp 6a ' and the output terminals 6 ' , 7 ' is a main current path leading through the device 31 educated. In the main current path 31 there is a main contact point 32 which is designed so that the main current path 31 at the main contact point 32 can be opened and closed. The main current path 31 includes only the main contact point 32 and a magnetic release connected in series with a striking coil 33 , but not other elements such as a thermal release. The beating coil 33 has a striker in a known manner, which is driven out of the coil in a known manner in the event of a high short-circuit current, and the main contact point 32 hits. The striker is indicated by the dashed line with the reference number 35 functionally represented.

There is a bypass path in the device 34 present that has a bypass resistor 36 for current limitation and a secondary contact point 37 to interrupt the bypass flow path as well 34 includes.

A short-circuit current is divided in the time before the striking coil responds 33 and the opening of the main contact point 32 on into a partial flow through the main flow path 31 and a partial flow through the secondary flow path 34 . This means that not all of the short-circuit current flows through the main contact point 32 what the thermal load the main contact point 32 and, for example, welding the contacts at the main contact point 32 counteracts. The current in the main current path 31 is due to the ohmic resistance of the beater coil 33 limited. The current in the bypass path 34 is caused by the bypass resistance 36 limited.

When opening the main contact point 32 in the event of a short circuit, a switching arc occurs. In order to delete this quickly, is located in the device 1 , 1' , the main contact point 32 assigned to an arc extinguishing device. How such a system is constructed and how it works is basically known in switchgear technology. Therefore, such an arc extinguishing device is not shown here in the figures either.

It is also a rear derailleur 38 available. The rear derailleur 38 is designed so that a mechanical coupling with the switch handle 22 ' , the main and the secondary contact point 32 , 37 and one to the neutral conductor switching device 1' Lined up phase switching device (not shown) is enabled. The mechanical couplings mentioned are in the 1 shown schematically by dashed active connection lines without reference numerals. The person skilled in the art is familiar with ways to actually implement them.

The bypass path 34 runs parallel only to the main contact point 32 . The beating coil 33 is in series with the one from the bypass path 34 and main contact point 32 formed parallel connection. This can reduce the ohmic resistance of the beating coil 33 the short-circuit current in the main current path 31 limit, and the bypass resistance 36 can the current in the bypass path 34 limit.

Here in the 1 or. 8th a variant is shown in which the housing 2 ' a mounting side 31 ' which is designed so that the housing can be put on 2 ' on one or more busbars, one busbar is an example 40 shown, is made possible. The neutral conductor switching device 1 , 1' has an electrical connection with the access terminal 6a , 6a ' connected power busbar 41 that are inside the device, near the mounting side 39 , 39 ' , is arranged. On the for attachment to the busbar 41 provided point protrudes from the power rail 41 attached clamp assembly 42 on the fastening side 39 , 39 ' out of the case 2 , 2 ' out. The clamping arrangement 42 , 42 ' is designed so that a mechanical stop and an electrical connection of the busbar 40 and thus the neutral conductor switching device 1 , 1' with the busbar 41 , 41 ' is made possible.

At the in 1 and 8th The so-called busbar variant of a neutral conductor switching device shown on the basis of a selective circuit breaker is therefore via an access terminal 6a ' , 6a or a clamp arrangement 42 , 42 ' with the neutral conductor busbar 40 the device is connected on the access side. For the meter connection on the output side, the is through the neutral conductor switching device 1 , 1' guided and switchable neutral conductor to a first output terminal 6 ' , 6th connected. This is here as a screwless spring-loaded terminal with an actuating lever 12th (please refer 1 to 7th ) executed. Details of the screwless spring clamp terminal, known in principle, as used here, are in the DE 10 2008 017 738 A1 described. In the case of a TT network, a switched neutral conductor is also required for the system operator's network. For applications with high currents, for example 80 A or 100 A, the outgoing conductors must have a large conductor cross-section, for example 16mm ² . Two such conductors with a large cross-section do not fit into the screwless spring-loaded terminal with operating lever used here. Therefore, according to the invention, it is here in the terminal connection space 5 a second output terminal 7 ' , 7th intended. For a second screwless spring-loaded terminal that has the same structure as the first output terminal 6 ' , 6th there is no space in the housing. The housing widths are determined by the standard in multiples of so-called module widths, one module width corresponds to 25 mm. The module width must not increase when the second output terminal is installed. Therefore, according to the invention, a type of terminal is used as the second output terminal which is different from the screwless spring-loaded terminal of the first output terminal 6 ' , 6th .

It will now be the 2 to 7th considered. The terminal connection area 5 has a first clamp insertion opening 10 . You can see it in the upper part of the terminal connection area 5 , near the front 3 , one in the terminal compartment 5 first connection terminal fixed in position 6th of the screwless spring-loaded terminal type for connecting a first connecting conductor. This has a first clamping spring 11 and one from outside the housing 2 operable and with the housing 2 at a storage location 43 pivotally connected first spring actuating lever 12th .

In the terminal connection area 5 there is also a support part 14th made of metal. This has a first clamping strip 13 in the upper part of the terminal receiving area 5 . The first clamp spring 11 , the clamping spring of the spring-loaded terminal, has a contact leg 15th , a clamp leg 16 with a clamping window encompassing a clamping edge and a contact and clamping leg 15th , 16 connecting curved spring back 17th . The first clamp spring 11 works with the first Clamping strips 13 together so that one through the first clamp insertion opening 10 introduced first connection conductor between the back of the first clamping strip 13 and the clamping edge of the clamping window can be clamped. In addition, the contact leg is located 15th the first clamping spring on the first clamping strip 13 on. When the operating lever 12th is pivoted counterclockwise, upward, from the locking position shown in the figures, it presses with its actuating extension 44 on the back of the feather 17th and with it the first clamp leg 16 downward. This releases the terminal window, as in the above DE 10 2008 017 738 A1 described.

In the lower part of the terminal compartment 5 is a second clamp insertion opening 18th available. On the carrier part 14th is a second clamping strip 19th appropriate. For this purpose, there is an approximately L-shaped extension part on the first clamping strip 13 attached, one leg of which extends down into the second part of the terminal receiving space, and the second leg to the right, to the second output terminal 18th is bent down and the outer free end of the second clamping strip 19th forms.

With the second clamping strip 19th is a clamp frame 20th , 20 ' a second output terminal 7th , 8th of another type coupled for connection of one through the second clamp insertion opening 18th introduced second connection conductor 9 .

The first and second clamp insertion openings 10 , 18th are therefore on the narrow side on the exit side 4th and from the front 3 arranged one behind the other as seen.

In the 2 to 4th an embodiment is shown in which the second connection terminal 7th is of the screw terminal type. It has a clamping screw 21st and a first clamp frame 20th , wherein the second connection conductor between the first clamping frame 20th and the second clamping strip 19th by means of the clamping screw 30th can be clamped. This is an easy-to-implement type of screw terminal, with a sliding clamp frame 20th , on one narrow side of which there is an upper web with a threaded opening through which the clamping screw 21st is led. The clamping screw 21st rests on the top of the first clamping strip 13 and when tightening the clamping screw 21st this pulls the first clamping frame 20th up towards the first clamping strip 13 to, so that between the lower web of the first clamping frame 20th and the underside of the first clamping strip 13 the neutral conductor can be clamped.

In the 5 to 7th an embodiment is shown in which the second connecting terminal 8th is of the type of a spring-loaded terminal. The spring clip 8th has a U- or Ω-shaped second clamping spring 23 with a second clamp leg 24 , a mounting leg 25th and one the second clamping leg 24 with the mounting leg 25th connecting bow piece 26th . It also has a second clamp frame 20 ' , which has a recess for receiving a second connection conductor 9 having. The fastening leg 25th the second clamping spring 23 is with a first ending 27 of the second clamping frame 20 ' connected, here either welded on or formed in one piece as a stamped and bent part or fastened in some other manner known in principle.

The free end of the spring 28 of the second clamp leg 24 works with a second connection conductor 9 clamping these together. This is the second clamping strip 19th with its direction of longitudinal extent onto the second terminal insertion opening 18th oriented towards, and the second clamping frame 20 ' is with an end 29 the recess on the second clamping strip 19th coupled. The coupling can be done in different ways. For example, it can be a fixed connection, form-fitting or force-fitting. The second clamp frame 20 ' is with its longitudinal direction perpendicular to the longitudinal direction of the second clamping strip 19th oriented. A conductor end piece inserted through the second clamp insertion opening is passed through the recess in the second clamp frame 20 ' plugged. The free end of the spring 28 of the second clamp leg 24 then acts with the second connection conductor introduced into the recess 9 so that it is on the second clamping strip 19th stuck.

In order to be able to open the spring-loaded terminal without having to use a tool, one is from outside the housing 2 operable and with the housing 2 on a bearing axis 46 pivotally connected second spring actuating lever 30th available. The pivoting direction of the second spring actuating lever 30th when opening the spring-loaded terminal 8th is from the narrow side 4th out towards the inside of the case 2 oriented towards. When the second spring operating lever 30th is pivoted in the direction of the interior of the housing, then it presses with its actuating extension 47 the second clamp leg 24 down, and the free end of the spring 28 gives the connection conductor 9 free so that it can be pulled out.

The spring clip 8th and the second spring operating lever 30th are so narrow that they are half a module width of the housing 2 fit in. This means they can be attached in the housing below and next to the first spring-loaded terminal 6. This means that two separate output terminals are implemented for the connection of one output conductor each with a large cross-section, without the housing having to be made wider.

List of reference symbols

1

Service switchgear

1'

Service switchgear

2

casing

3

rear front

4th

Narrow side

4 '

Narrow side

4a

Narrow side

4a '

Narrow side

5

Terminal connection area

6th

first connection terminal, type spring-loaded terminal; first output terminal

6 '

first connection terminal, type spring-loaded terminal; first output terminal

6a

Access clamp

6a '

Access clamp

7th

second connection terminal, screw terminal type; second output terminal

7 '

second connection terminal, screw terminal type; second output terminal

8th

second connection terminal, spring-loaded terminal type; second output terminal

9

Connection conductor

10

first terminal connection opening

11

first clamp spring

12

first spring actuation lever

13

first clamping strip

14th

Carrier part

15th

Contact leg

16

Clamp leg

17th

Spring back

18th

second clamp insertion opening

19th

second clamping strip

20th

first clamp frame

20 '

second clamping frame

21st

Clamping screw

22nd

Switch handle

22 '

Switch handle

23

second clamping spring

24

second clamp leg

25th

Mounting leg

26th

Elbow piece

27

first end of the second clamping frame

28

free spring end

29

End of the recess

30th

second spring actuation lever

31

Main current path

32

Main contact point

33

Striking coil, magnetic trigger

34

Shunt path

35

Striker

36

Bypass resistance

37

Secondary contact point

38

Rear derailleur

39

Mounting side

39 '

Mounting side

40

Busbar,

41

Busbar

42

Terminal arrangement

42 '

Terminal arrangement

43

Depository

44

Actuation process

45

L-shaped extension part

46

Bearing axis

47

Actuation process

Claims (4)

Service switching device (1, 1 '), which has a housing (2) with a front side (3), a narrow side (4) and a terminal connection space (5) on the narrow side (4); wherein two connection terminals (6, 7, 8) of different terminal types for connecting two connection conductors (9) are accommodated in the terminal connection space (5); the terminal connection space (5) has a first terminal insertion opening (10), a first connection terminal (6) of the screwless spring-type terminal, which is fixed in position in the terminal connection space (5) of the housing (2), is provided for connecting a first connection conductor, with a first clamping spring ( 11) and one from outside the housing (2) actuatable and connected to the housing (2) pivotally connected first spring actuating lever (12), with a first clamping strip (13) comprising carrier part (14), the first clamping spring (11) having a contact leg (15), a clamping leg (16) with a clamping window comprising a clamping edge and a system - and clamping legs (15, 16) connecting curved spring back (17), and wherein the first clamping spring (11) cooperates with the first clamping strip (13) such that a first connection conductor inserted through the first terminal insertion opening (10) between the rear side of the first clamping strip (13) and the clamping edge of the clamping window can be clamped, and wherein a second terminal insertion opening (18) is present in the terminal connection space (5) and the carrier part (14) has a second clamping strip (19) with which a clamping frame (20, 20 ') of a second connecting terminal (7, 8) of a different type is coupled for connection of a second terminal inserted through the second terminal insertion opening (18) final conductor (9); the first and the second terminal insertion opening (10, 18) are arranged one behind the other on a narrow side (4) and viewed from the front side (3); the second connecting terminal (8) is of the type of a spring-loaded terminal; the spring clip (8) has a U-shaped or Ω-shaped second clamping spring (23) with a second clamping leg (24), a fastening leg (25) and a curved piece (26) connecting the second clamping leg (24) to the fastening leg (25) , and a second clamping frame (20 ') which has a recess for receiving a second connection conductor (9), wherein the fastening leg (25) is connected to a first end (27) of the second clamping frame (20'), and the free spring end (28) of the second clamping leg (24) interacts with a second connection conductor (9) in a clamping manner; and wherein a second spring actuation lever (30), which can be actuated from outside the housing (2) and is pivotably connected to the housing (2), is provided for actuating the spring plug-in terminal (8). Installation switchgear (1) Claim 1 , characterized in that the second clamping strip (19) is oriented with its longitudinal extension direction towards the second clamp insertion opening (18), and that the second clamping frame (20 ') is coupled to one end (29) of the recess on the second clamping strip (19) is, wherein the free spring end (28) of the second clamping leg (24) interacts with the second connection conductor (9) inserted into the recess in a clamping manner on the second clamping strip (19). Installation switchgear (1) Claim 1 or 2 , characterized in that the second clamping frame (20 ') is oriented with its longitudinal direction perpendicular to the longitudinal direction of the second clamping strip (19). Installation switching device (1) according to one of the Claims 1 to 3 , characterized in that the pivoting direction of the second spring actuating lever (30) when opening the spring plug-in terminal (8) is oriented from the narrow side (4) in the direction of the interior of the housing (2).

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