EP2561585B1 - Connection apparatus with variable electrical connection between conductor terminals - Google Patents

Description

The invention relates to a connection device for connecting electrical devices according to the preamble of claim 1.

For the commissioning of AC electric motors, it is known to operate them in star connection, so that the tightening torque and the starting power of the motor are reduced. Such a motor is switched to the delta circuit only after starting up.

In the star connection, the free ends of the phase phases of the three-phase motor are electrically connected to the outer conductors of an AC network. In the delta connection, however, the phases of the three-phase motor are connected in series, so that one end of a phase string is connected to the beginning of the next phase phase.

Against this background, it is of interest to provide a connection device in which the interconnection of the multiple connections is easily variable between at least two different states. It is also according to another aspect of interest to provide particularly advantageous multiple connections for such a terminal housing.

The solution to this problem is the object of the invention.

The invention solves this problem by the subject matter of claim 1.

Advantageous embodiments of the invention can be found in the dependent claims.

Fig. 1a

eine Draufsicht auf eine Anschlussvorrichtung in einer ersten Konfiguration;

Fig. 1b

eine Draufsicht auf die Anschlussvorrichtung aus Fig. 1 a in einer zweiten Konfiguration;

Fig. 2

eine Sprengansicht der Anschlussvorrichtung aus Fig. 1;

Fig. 3a,b

eine perspektivische Einzelansicht eines Gehäuseunterteils und eines Gehäuseoberteils der Anschlussvorrichtung aus Fig. 1ohne Metallbaugruppen;

Fig. 4

eine perspektivische Ansicht eines Konfiguriersteckers für die Anschlussvorrichtung aus Fig. 1;

Fig. 5

eine perspektivische Ansicht eines ersten Mehrfachanschlusses;

Fig. 6a-c

perspektivische Ansichten weiterer Mehrfachanschlüsse;

Fig. 7a-d

eine montierte Anschlussvorrichtung, die im Fall der Fig. 7a, b in Sternschaltung beschaltet ist, und im Fall der Fig. 7c, d in Dreieckschaltung.

The invention will be described in more detail below with reference to the drawing with reference to a preferred embodiment. Show it:

Fig. 1a

a plan view of a connection device in a first configuration;

Fig. 1b

a plan view of the connection device Fig. 1 a in a second configuration;

Fig. 2

an explosive view of the connection device Fig. 1 ;

Fig. 3a, b

an individual perspective view of a housing lower part and a housing upper part of the connection device Fig. 1 without metal assemblies;

Fig. 4

a perspective view of a Konfiguriersteckers for the connection device Fig. 1 ;

Fig. 5

a perspective view of a first multiple connection;

Fig. 6a-c

perspective views of further multiple connections;

Fig. 7a-d

a mounted connection device, which in the case of Fig. 7a, b is connected in star connection, and in the case of Fig. 7c, d in delta connection.

The connection device of Fig. 1 to 2 for connecting electrical devices, in particular of electric motors, to an AC system based on a housing 1, which has a housing lower part 2 and an upper housing part 3 which can be placed on the housing lower part 2 or a cover. Here, the housing 1 is a separate housing. The housing 1 can also be attached to another - higher - - housing or integrally formed with this (not shown here).

The lower housing part 2 has a bottom 4 and side walls 5 and intermediate walls 6, which define chambers 7 which are designed to receive three identical first multiple connections 8 and in each case one further second multiple connection 9, 10, 11. The second multiple connections 9, 10, 11 are designed differently. Fig. 1 shows the state with the first and second multiple terminals 8, 9, 10, 11 inserted in the housing 1.

The upper housing part 3 has a trough-like design. It is provided on its top wall 12 with insertion openings 13 for conductors and insertion openings 14 for knife contacts 26, 27 to be described in more detail.

The first and second multiple terminals 8 to 11 each have one or two first terminals provided as conductor terminals 15, 16, which are formed here as direct plug terminals (push-in), and the actual terminal of conductor ends or the like. Furthermore, they have at least one or more second connections connected thereto in a conductive manner, here contact tulips 17, 18, 19, which serve for inserting corresponding contacts, in this case blade contacts.

In an advantageous embodiment, the first multiple connections 8 each have two of the first conductor connections 15, 16 - that is, two direct connection connections - and one of the second connections - in other words one of the contact tulips 17 here.

The design of the first conductor terminals 15, 16 as a direct plug-in connections is particularly compact and the connection can be realized quickly and safely. In the following, the terms direct plug connection and first conductor connection 15, 16 are used synonymously. However, the first connections could also be formed in other connection technology - such as tension spring connections or as screw connections or the like.

Instead of the contact tulips 17 as second terminals and knife contacts or pin contacts could be provided. In this case, the corresponding connection contacts would then be formed on a configuration plug 23 to be described as contact tulips / sockets.

The direct plug connections 15, 16 preferably each have a clamping cage 20 and a preferably V-shaped clamping spring 21 with a free pressure clamping leg, which is held in the clamping cage 20 (see Fig. 5 and 6 ) and which serves to press a conductor against a busbar 22. This bus bar 22 is preferably a stamped / bent part and integrally connected to the one or the two or three second terminals 17. As a result, the direct connections 15, 16 and the second connections 17 of the first multiple connections 8 are connected to one another in an electrically conductive manner.

The first conductor connections 15, 16 of the first multiple connections 8 are therefore designed here as double connections. In this case, two clamping cages 21 and busbars 22 are provided, but the latter can also be the two ends of a single stamped and bent part, at the second ends of the one or more contact tulips 17, 18, 19 are formed.

A particularly advantageous configuration plug 23 serves to realize a conductive connection of one or more of the first and second multiple connections 8, 9, 10, 11 with one another. The configuration plug 23 can be plugged into the housing 1 both before the connection device is connected to conductors and after this connection.

The configuration plug 23 has an insulating body 24, on one side of which an optional hand grip 25 is formed.

At the side remote from the handle 25 of the Konfiguriersteckers finger-like projections 30 are provided, on which terminals 26, 27, 28 are arranged. Some of the terminals are formed as contact blades 26, 27, which are conductively connected together here.

The configuration plug 23 can be inserted into two positions which are different from each other by 180 ° in the insertion openings 14 and the contact tulips 17, 18, 19 underneath ( Fig. 1 a and 1 b). The wiring caused by the selected position can be recognized by an inscription on the housing upper part 3 and an arrow on the configuration plug 23.

The arrangement of the insertion openings 14 in the housing upper part 3 and the arrangement of the multiple connections 8, 9, 10, 11 in the housing lower part 2 is such that with the configuration plug 23 one or more of the first and / or the second multiple connections (here with W1, L3, V2 , L2, U1, L1 as well as V2, U2, W2), are conductively connected to one another in order to realize the respective desired circuit.

Namely, the first multiple terminals 8 for connecting and electrically connecting the terminal conductors L1, L2, L3 of an AC network to a first end of the phase strings U1, V1, W1 of a three-phase motor (not shown) are provided here. Furthermore, here the second multiple connections 9, 10, 11 are provided for connecting the second ends of the phase strands U2, V2, W2 of the three-phase motor.

In a first position of the configuration plug 23, in each case a second connection 17 of a first multiple connection 8 is electrically conductively connected to a second connection 17 of a second multiple connection 9, 10, 11, in each case one of the contact blades 26, 27 of the configuration plug 23 being inserted into the second connection 17 of the first multiple connection 8 and the other contact blade 26, 27 of the configuration plug 23 is inserted into the second connection 17 of the second multiple connection 9, 10, 11.

As a result, in the first position of the configuration plug 23, the direct connections 15, 16 of the first multiple connection 8 provided for the first ends of the phase strands U1, V1, W1 of the three-phase motor are provided with the direct connections 15 provided for the second ends of the phase strands U2, V2, W2 of the three-phase motor , 16 of the second multiple connection 9, 10, 11 connected. Therefore, a connected to the connecting device Three-phase motor in the first position of the Konfiguriersteckers 23 connected in a triangle. The Fig. 7c, d shows the connecting device in the first position, wherein the configuration plug 23 in the Fig. 7c only the contact blades 26, 27 are shown. It shows the Fig. 7d the cut DD through the Fig. 7c ,

In the second position of the Konfiguriersteckers 23, however, the second terminals 17 of the second multiple connections 9, 10, 11 are connected to each other by inserting the contact blades of the Konfiguriersteckers 23, so that the second ends U2, V2, W2 are electrically connected. In this second position of the connected to the connecting device three-phase motor is therefore connected in a star. The Fig. 7a, b shows the connecting device in the second position, wherein the configuration plug 23 in the Fig. 7a only the contact blades 26, 27 are shown. It shows the Fig. 7b the cut CC through the Fig. 7a ,

Since only two contact bridges between the second ends of the phase strands U2, V2, W2 of the three-phase motor are required for producing the star connection, namely one of W2 to V2 and another of V2 to U2, but three contact bridges are necessary for producing the delta connection, namely a first from U1 to U2, a second from V1 to V2 and a third from W1 to W2, the connection device is provided so that the unnecessary for the star connection third contact blades 26, 27 in the second position of the Konfiguriersteckers 23 though inserted into an insertion opening 14 but not be electrically connected.

For the above description of preferred embodiments, it should be noted that some preferred embodiments are described in detail below, but that the invention is not limited to these embodiments but can be configured as desired within the scope of the claims. In particular, terms such as "top", "bottom", "front" or "rear" are not restrictive but merely refer to the particular arrangement shown. In addition, if individual components are explained, these - unless otherwise mentioned - in principle also conceivable in multiple design. The scope of protection also includes functional reversals of the illustrated arrangements and methods as well as equivalent embodiments.

reference numeral

casing

1

Housing bottom

2

Housing top

3

ground

4

side walls

5

partitions

6

chambers

7

First multiple connections

8th

Second multiple connections

9, 10, 11

upper wall

12

insertion

13, 14

Direct plug-in connections

15, 16

Contact tulips

17, 18, 19

clamping cage

20

clamping spring

21

conductor rail

22

Konfigurierstecker

23

insulator

24

handle

25

connection

26, 27, 28

contact blade

26, 27

approaches

30

Claims (12)

1. A connection apparatus for connecting electrical devices, in particular electric motors, especially to an AC system, comprising a housing (1) with a lower housing part (2) and an upper housing part (3), wherein a plurality of multiple terminals (8, 9, 10, 11) are arranged in the housing (1), said multiple terminals respectively having at least one or two or more conductor terminals (15, 16) and second terminals (17, 18, 19) which are electrically conductively connected thereto, wherein the connection apparatus comprises a configuring plug (23) which is provided for conductively connecting individual or a plurality of the multiple terminals (8, 9, 10, 11) in at least two different positions for realising at least two different circuit types, characterized in that the conductor terminals (15, 16) are formed as direct plug-in terminals (push-in).
2. A connection apparatus according to claim 1, characterized in that the configuring plug can be applied from the outside to the housing (1) and comprises contacts which are formed for the engagement in one or a plurality of the second terminals (70, 18, 19) of individual or a plurality of the multiple terminals (8, 9, 10, 11).
3. A connection apparatus according to claim 1 or 2, characterized in that the contacts of the configuring plug (23) are contact blades (26, 27) and the second contacts of the multiple terminals (23 - 24) are corresponding tulip contacts (17, 18, 19).
4. A connection apparatus according to one or several of the preceding claims, characterized in that the direct plug-in terminals preferably each comprise a clamping cage (20) and a clamping spring (21) retained in the clamping cage and a busbar (22).
5. A connection apparatus according to one or several of the preceding claims, characterized in that two of the direct plug-in terminals are joined to a double terminal.
6. A connection apparatus according to one or several of the preceding claims, characterized in that the multiple terminals (15, 16) comprise first multiple terminals (8) and second multiple terminals (9, 10, 11), wherein the first multiple terminals (8) each comprise two conductor terminals (15, 16) and one of the second terminals (17).
7. A connection apparatus according to one or several of the preceding claims, characterized in that the first multiple terminals (8) are provided for connecting and electrically connecting the connecting conductors (L1, L2, L3) of an AC network to a first end of the phase conductors (U1, V1, W1) of a three-phase motor.
8. A connection apparatus according to claim 7, characterized in that the second multiple terminals (9, 10, 11) are provided for connecting the second ends of the phase conductors (U2, V2, W2) of the three-phase motor.
9. A connection apparatus according to one or several of the preceding claims, characterized in that insertion openings (13) are provided in the housing (1) for inserting the conductors into the conductor terminals and insertion openings (14) for inserting the contacts of the configuring plug (23).
10. A connection apparatus according to one or several of the preceding claims, characterized in that the configuring plug (23) can be inserted into the insertion openings (14) in two positions which differ from each other relatively by 180°.
11. A connection apparatus according to one or several of the preceding claims, characterized in that the arrangement of the insertion openings (14) in the upper housing part (3) and the arrangement of the multiple terminals (8, 9, 10, 11) in the lower housing part (2) is such that individual or a plurality of the first and/or second conductor terminals of the multiple terminals (designated W1, L3, V2, L2, U1, L1 and V2, U2, W2) are conductively connected to each other by the configuring plug (23).
12. A connection apparatus according to claim 9, characterized in that the conductive connection is such that during the connection of a device such as an AC electric motor a star connection can be realised in a first position and a delta connection in a second position of the configuring plug (23).

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