EP3685471A1

EP3685471A1 - High-current connector comprising an insulating bush

Info

Publication number: EP3685471A1
Application number: EP18773929.7A
Authority: EP
Inventors: Stefan Schnieder
Original assignee: Harting Electric GmbH and Co KG
Current assignee: Harting Electric Stiftung and Co KG
Priority date: 2017-09-22
Filing date: 2018-09-06
Publication date: 2020-07-29
Anticipated expiration: 2038-09-06
Also published as: EP3685471B1; US10992080B2; KR20200049870A; KR102386790B1; WO2019057239A1; CN111133633B; CN111133633A; US20200266577A1

Abstract

According to the invention, the connection side (A) of a high-current connector (1) is provided with an insulating bush (4) which is used to maintain the required air gaps and leakage distances between current-conducting and earth-connected parts while allowing a compact installation space.

Description

High current connector with insulating sleeve Description

The invention is based on a high-current connector according to the preamble of the independent claim 1.

Connectors are basically required to reversibly connect electrical lines or connections. In general, connectors and mating connectors are used to provide an electrical and mechanical connection between two electrical conductors or an electrical conductor and a device or a

Installation.

In particular, high current connectors are needed to provide a particularly high electrical current of e.g. more than and including 100 amps (A), especially more than 200 amps inclusive, preferably more than 400 amps inclusive, and more particularly an electrical current greater than or equal to 600 amps and in some instances even up to 800 amps and greater than one to the high current connector belonging high current contact element, eg via a pin or a socket contact to transfer. The can

High current connector lead compared to their ground potential voltages that amount to several thousand volts (V), ie. at least 2000 V, in particular at least 3000 V, for example 4000 V and more, e.g. up to 4800 V or even more. The ground potential may be at least at a cable gland of the high-current connector and in particular on an at least partially metallic

Connector housings for shielding and / or grounding purposes.

The pin and / or socket contacts of the high current connectors may have an outer or inner diameter of more than 1 cm, eg at least 1, 5 cm, preferably at least 2 cm, more preferably at least 2.5 cm or in some cases even 3 cm and more. The

electrical conductor of high-current cables attached to such

High current contact elements can be connected

For example, a cross-sectional area of at least 70 mm ² , in particular at least 95 mm ² , preferably at least 120 mm ² , more preferably 150 mm ² , for example, 185 mm ² and more. As a rule, these are stranded conductors. Such a stranded conductor can be connected on the cable connection side to the respective connection region of a high current contact element, for example crimped on a crimp connection or screwed eg with an axial screw connection known from the prior art, in order to produce a reliable and low-resistance electrical contact.

Such high-current connectors are used for example in the railway sector. Also applications in power plants, transformer stations,

Industrial plants and high current distributions are common.

State of the art

DE 20 2006 003 204 U1 shows a connector which is designed as a plug or mounting housing. The connector consists of a connector housing, in which an insulating body is received with electrical contacts. The electrical contacts are provided for connecting electrical lines, which are guided on the back of the connector from the plug or mounting housing.

From DE 10 2010 014 982 A1 discloses a connector for electrically connecting a cable is known. The connector has a

Connector housing, in which a multi-part shielding element is arranged. The shield element serves the electrical Contacting a cable shield and electrically connecting the cable shield to the connector housing.

The document DE 10 2014 1 12 701 A1 describes a

High-current plug-in contact whose aluminum crimping area and its plugging area are made of copper, to electrical problems when connecting a high-current aluminum cable to a high-current copper cable or a high-current copper contact in the area of

To reduce material transfer. In this connection, implicitly, a shape and a function of a high-current connector / a high-current contact element will also be explained.

In the prior art, there is a general problem that in

High current connectors, in particular due to the often performed by them, mentioned above high voltages of e.g. up to 4800 V and more, often resulting in relatively large so-called "creepage distances and creepage distances." As a result of these clearances and creepage distances, unwanted short-circuits may occur between the live parts of the high-current connector and the parts of the high-current connector which are actually electrically isolated from them and have ground potential. by a so-called electrical "leakage current" flows and / or by it comes to voltage breakdowns such as flashovers.

The cause of these voltage breakthroughs / flashovers and leakage currents can be seen in addition to the said high electrical voltages, inter alia, in the electrical conductivity of the surfaces of insulators and the air, which are located between these parts. The basic problem of such creepage distances and clearances is well known to those skilled in the high current / high voltage engineering. The consequence of the high current connector is usually that the space of the high current connector must be sufficiently large to the necessary creepage distances and to avoid in this way the said flashovers and leakage currents.

A disadvantage of the known Hochstromsteckverbindern is the resulting, large footprint. On the one hand, this is necessary to maintain sufficiently large clearances and creepage distances. On the other hand, he contradicts the general desire for a compact design as possible of the high current connector. In practice, high-current connectors are in particular often required, which have the smallest possible height in the plugging direction.

The German Patent and Trademark Office has in the priority application for the present application, the following prior art research: EP 1 925 060 B1 and DE 20 201 1 101 574 U1.

task

The object of the invention is to be as compact as possible

Specify design for a high-current connector, through which the necessary clearance and creepage distances are maintained at the same time.

The object is solved by the features of independent claim 1.

Advantageous embodiments of the invention are specified in the subclaims.

A high current connector has a connector housing and a metal high current contact element. The high current connector has a plug side and a connection side. The high current contact element is arranged in the interior of the connector housing. The high current contact element has a plug-in area and a

Connection area to which an electrical conductor, in particular a Stranded conductor, a high-current electrical cable can be connected. The electrical high-current cable is by means of a cable attachment,

in particular a cable gland, attachable to the connection side of the high-current connector.

According to the invention, the high-current connector has an insulating sleeve fastened to its connection side or at least attachable. This insulating sleeve is characterized in that it has a hollow cylindrical portion at a first end, namely cable connection side. To one opposite, namely

Housing connection side, towards the end, enlarges

Inner diameter of the insulating sleeve, causing the insulating sleeve

Has a funnel-shaped attachment portion housing side.

In a preferred embodiment, the high-current cable described below is connected to the high-current connector or at least connectable.

The current-carrying electrical conductor of the high-current cable is surrounded by insulation. The electrical conductor is preferably made of cable strands, so that it is a stranded conductor and the insulation surrounding it is a strand insulation, which in the

Hereinafter also referred to as such.

The strand insulation of the high current cable is surrounded in the normal state by a braided shield, which in turn is covered by an outer sheath. The outer jacket is preferably made of a

formed insulating material or has at least one insulating outer layer. To connect to the high current contact of the high current connector, the high current cable first

"sheathed" on the housing side, ie the outer sheath is removed at the end of the high-current cable to be connected. The braid is then usually bent away from the end of the high-current cable to be connected by 180 ° and can in the cable attachment, in particular the cable gland, together with the other high-current cable on preferably at least partially metallic but possibly also electrically insulating

Connector housing attached, e.g. bolted, and possibly electrically connected to it.

The terminal end of the high current cable is ultimately stripped, i. the strand insulation is removed at the terminal end to allow the stranded conductor to be connected to the high current contact element.

Housing connection side, the insulating sleeve with its funnel-shaped mounting portion is attachable to the connector housing.

Preferably, the insulating sleeve can be inserted with its attachment portion in the connector housing. For this purpose, the insulating sleeve can engage, for example, in the high-current connector. Alternatively or additionally, the insulating sleeve can be inserted into a negative mold of the insulating sleeve, which is formed in the interior of the connector housing. Furthermore, a one-piece version of

Connector housing and insulating conceivable. Than are

Connector housing and insulating sleeve in a common

Process produced. Another possible embodiment consists in a snapping the insulating sleeve on the connector housing, preferably in conjunction with a rubber and / or

Plastic seal and / or a rubber and / or

Plastic overlap. Cable connection side is the insulating sleeve with its hollow cylindrical section on the high-current cable, in particular his

Strand insulation, can be pushed on.

The insulating sleeve is then in the stripped area of the

High current cable with its hollow cylindrical section on the

Strand insulation on and can be arranged at least in sections between the braid and the strand insulation. The inner diameter of the cable connection side, hollow cylindrical

Section of the insulating sleeve can for this purpose correspond to the outer diameter of the strand insulation of the high-current cable.

The high-current contact element is intended to transmit high electrical currents and, in particular, can also lead to particularly high electrical voltages. The high current contact element, in particular its connection region, is thus a live component of the high current connector. Another voltage-carrying part is the electrical conductor, in particular the stranded conductor, the

High power cable.

The cable attachment, in particular cable gland, of

High current connector and possibly the preferably at least partially electrically conductive connector housing, however, can lead ground potential. Another ground potential leading part is the screen, in particular the screen braid of the

High power cable.

Even if the connector housing is not electrically conductive, that is, for example, consists of an electrically insulating plastic, at least the cable attachment, in particular cable gland, and the screen attached thereto, for example, the braided shield on the High current connector connected electrical

Hochstromkabels, be regarded as a mass-leading part.

To assess the dielectric strength of the high-current connector, the following clearances and creepage distances between voltage-carrying and earth-carrying parts / components must therefore be particularly observed:

- An outer creepage distance

- an inner creepage distance

- an outer air gap, and

- a direct air route.

For economic reasons, it may be beneficial to the two

Creepage distances of the same size. Depending on other design factors and the two air gaps can be made the same size. Both have the reason that the electric current basically seeks the path of least resistance, one

Enlargement of each already larger air or creepage distance from the perspective of the dielectric strength so no special meaning.

To the outer creepage distance:

The outer creepage distance extends from the connection region of the high-current contact element via the outer region of the insulating sleeve to the braided shield and / or to the cable attachment, in particular

Cable gland, which is at ground potential, by e.g. is in electrical contact with the shield braid of the high current cable.

The outer creepage distance can be increased in an advantageous embodiment by the shape of a, on the funnel-shaped mounting portion formed on the outside, circumferential gradation. The gradation can be one or more, that is two, three, four, five or six or even have even more increases to extend the outer creepage distance.

By the said gradation finally increases the outer

Surface of the insulating sleeve and thus the distance that a leakage current on the outer surface of the insulating sleeve may have to cover, for. to get from the connection area of the high current contact element to the cable gland / screen braid. Advantageously, in a preferred embodiment, at least one, preferably two, of the increments associated with the gradation also serve to secure the insulating sleeve to the connector housing.

In a preferred embodiment, the gradation thus consists of at least one circumferential increase. Advantageously, the gradation has at least two circumferential elevations, namely a first elevation and a second elevation. In this case, the first elevation, which is arranged in the direction of the cable connection side of the insulating sleeve, is made higher than the second elevation, which is arranged in the direction of the device connection side of the insulating sleeve.

Between the two elevations exists a circumferential recess. As a result, the outer creepage distance is extended even further.

Alternatively or additionally, the gradation can also be from a

circumscribe deepening. In a particularly preferred

Embodiment, the connection side at least two, so two, three, four, five, six or more circumferential recesses, thereby further increasing the outer creepage distance of the current and at the same time to preserve the compact design of the connector housing at least or even to be able to reduce , In a preferred embodiment, there are two wells. In particular, is that depression, which tends towards the mating side of the Insulating sleeve is arranged, running deeper than the recess, which is arranged rather in the direction of the connection side of the insulating sleeve.

Furthermore, the at least one recess of the fastening of the insulating sleeve on the connector housing can also serve.

To the inner creepage distance:

The inner creepage runs within the insulating sleeve of

Connection region of the high current contact element by the

hollow cylindrical portion of the insulating sleeve to the braid of the high current cable and is thus influenced substantially by the length of the hollow cylindrical portion. An increase in the length of the hollow cylindrical section thus increases the length of the inner creepage distance, without affecting the geometric size of the

Hochstromsteckverbinders, in particular its connector housing, to act.

To the outer air route:

The funnel shape of the mounting portion of the insulating sleeve can serve to extend the outer air gap by, in simple words, the air gap in a detour around the

Fastening section leads around.

The outer air gap can therefore be increased by the shape of the funnel-shaped attachment portion. This can - depending on the specific design - in particular by using an at least partially made of plastic connector housing - are supported.

To the direct air route: The direct air gap runs along a straight-line connection line from the connection region of the high-current contact element to

Cable gland / the shield braid and traverses the material of the insulating sleeve.

As a result of the material thickness in a relevant region of the insulating sleeve, the direct air gap between the connection region and the cable gland can thus also be increased. A direct breakdown of the connection area to the cable gland can be prevented. The relevant area of the insulating sleeve lies on the direct connection line, which is from the connection area of the

High current contact element leads to the cable gland.

Strictly speaking, this is not exclusively a pure air gap, since its effective electrical length is determined not only by the air, but also by the plastic material, in particular its dielectric constant, and its material thickness in the relevant region of the insulating sleeve. The plastic material increases the effective electrical length of the direct air gap. For the sake of uniformity but the term "direct air gap" in the

Further used below.

The direct air plug can be of particular importance when the connector housing is at least partially made of an electrically insulating material, such as plastic. Furthermore, however, it may also be of importance for metallic connector housings if the cable fixture or the screen braid are arranged closer to the terminal region due to the design of the high-load connector than the high-current contact element at any grounded, metallic region of the connector housing. Finally, the connector housing, for example

Shielding purposes, at least partially made of an electrically conductive material, e.g. be formed of metal, in particular aluminum.

In particular, the connector housing may also be partially formed of metal and partially made of plastic. In a preferred

Embodiment, the housing may be made of metal, e.g. Aluminum, be formed and inside a plastic coating or an inner plastic cladding o.ä. respectively. The plastic usually serves to a direct electrical connection of the

Connector housing with live elements of the

High current connector safely excluded. To counter

Clearances, ie punctures or similar To be sufficiently effective, the plastic material would optionally have additionally sufficient strength.

If, as mentioned above, the cable attachment / cable gland / the shield braid is particularly close to the connection area of the high-current contact element, then the direct air gap is initially shorter than the path from high current contact element to possibly electrically conductive and grounded connector housing. In this case, the material thickness of the insulating sleeve in the relevant area is of particular importance, and the insulating sleeve thus increases in this case the direct air gap. Otherwise, measures could first be taken to reduce the air gap between the

High current contact element and the connector housing to

enlarge.

In order to support the compactness of the design, in particular in the plug-in direction, the connector housing is preferably an angled connector housing. This means that the mating side and the connection side are arranged at an angle, in particular a right angle, to one another. For space-saving Realization, the high-current contact element can be made in two parts and can thereby allow a rectangular connection area, which provides over a curved area, the particular advantage of a particularly large space savings.

The preferably metallic high-current contact element thus consists of a first part and a second part, which are connected to one another in the connection region. The first part has a plug-in area, which may have a contact pin or a contact socket. The second part is formed from a connection region, which in particular has a crimp or axial screw connection. One of the two parts, preferably the second part, may have a connection opening for the electrical and mechanical connection with the other, preferably the first, part. The respective other of the two parts, preferably the first part, has a connecting section which interacts mechanically and electrically with the connecting opening of the second part and preferably can be accommodated in a positive and non-positive manner therein.

For the said space saving so the said rectangular

The aim is to connect these two parts. The can in a less preferred embodiment by a screw and / or in a particularly preferred embodiment by a so-called

"Shrinking" done.

For screwing the connecting portion may have an external thread and the connecting opening has a matching internal thread, so that the connecting portion in the connection opening

can be screwed.

In the particularly preferred embodiment, however, the electrical and mechanical connection of the two parts is produced by said shrinking, that is to say by a shrink-on connection. The The technique of shrinking consists in that the part which has the connection opening, preferably the second part, is heated, whereby the connection opening expands. The other part, preferably this is the first part, is then, for example, with its connecting portion, in the

Connection opening introduced. Ideally, the

Connection opening and the connecting portion have a circular cross-section to interlock positively, so that the risk of tilting does not exist.

Then, the connection opening is reduced again by cooling (shrunk), so that the connection opening the

Connecting section positively and non-positively encloses. Thus, the angled contact - compared to a contact produced in the bending process with a corresponding bending radius - produced at right angles, whereby the space requirement of the high-current connector itself,

especially in the plug direction, reduced. The holding and contact force of this connection can - depending on the material thickness and

Material texture - in this way be particularly large and stable.

Said cable attachment, in particular cable gland, which holds the high-current cable to the connector housing serves

Of course, primarily the strain relief, so to relieve the connection of the stranded conductor to the terminal region of the high current contact element of mechanical stress in the form of tensile forces.

Furthermore, the cable attachment, in particular cable gland but possibly also the screen connection to a, at least partially metallic connector housing. On the other hand, for protective grounding, an additional protective earth contact ("protection earth Contact "/" PE contact ") may be provided, which will not be described here in detail.

Cable glands are known in the art. For example, DE 103 1 1 473 B3 discloses a cable gland in which the strain relief is combined with the seal. The cable attachment is mounted on the connection side of the high current connector and secures the high current cable to the connector housing. In addition, the cable attachment, in particular cable gland, for a ground connection of the shield braid to the high-current connector, in particular its connector housing, provide.

In a further preferred embodiment, the insulating sleeve on a rotation. The rotation can be a chamfer or a recess or a molding on the

Act on the connection side of the insulating sleeve. These different variants of the anti-rotation lock or hook with the

Connector housing or fit accordingly. Thus, a rotation of the insulating sleeve is prevented in the connector housing.

The insulating sleeve according to the invention thus sufficiently large clearance and creepage distances are ensured. At the same time, the entire high current connector is also compact, i. designed to save space and has in particular in the direction of insertion a

comparatively low height. Furthermore, the insulating sleeve has a simple and thus inexpensive to manufacture design.

embodiment

An embodiment of the invention is illustrated in the drawings and will be explained in more detail below. Show it: Fig. 1 is a perspective view of an insulating sleeve according to the invention;

Fig. 2 is a perspective view of a

High current connector with the insulating sleeve and a connected high current cable;

Fig. 3 is a sectional view of the high current connector with the

Insulating sleeve and the high-current cable.

The figures contain partially simplified, schematic representations. In part, for the same, but possibly not identical

Elements identical reference numerals used. Different views of the same elements could be scaled differently.

1 shows a perspective view of an insulating sleeve according to the invention 4. In this illustration, the right rear

Cable connection side K of the insulating sleeve 4 shown. In the region of its cable connection-side end, the insulating sleeve 4 has a

cylindrical section 4.3.

Opposite is in this representation left front the

Housing connection side G of the insulating sleeve 4 shown. In the region of its housing connection-side end, the insulating sleeve 4 has a

Inner radius, which increases towards the housing connection side end.

At an outer area of a funnel-shaped

Fixing section 4.4 are formed a gradation. The

Gradation is formed in this example of a first increase 4.1 1 and a second increase 4.12 and serves to an external

Creepage along the surface of the insulating sleeve 4 to enlarge.

In this case, the first increase 4.1 1 with respect to the second increase 4.12 is arranged in the direction of the cable connection side K of the insulating sleeve 4. The first increase 4.1 1 is performed higher than the second increase 4.12, which is relatively more in the direction of the housing connection side G of the insulating sleeve 4 is arranged. The two elevations 4.1 1, 4.12 can also serve to secure the insulating sleeve 4 to the connector housing 2.

Furthermore, the insulating sleeve 4 has on its housing connection side G a first anti-rotation lock 4.21 and a second anti-rotation lock 4.22. The first rotation 4.21 is an Anformung to the first increase 4.1 1, wherein the Anformung 4.21 points in the direction of the housing connection side G and thus between the two

Elevations 4.1 1, 4.12 is arranged. In the second anti-rotation 4.22 is a recess with a chamfer, which is arranged at the housing-side end of the insulating sleeve and has both an inner and an outer contour. Thus, in this example at least two types of anti-rotation locks 4.21, 4.22 are shown, however, the use of e.g. only the first

Anti-twist 4.21 or only the second anti-rotation 4.22 possible.

FIG. 2 shows a perspective view of a high current connector 1. The high current connector 1 has a plug side S and a connection side A. The plug side S and the connection side A are arranged at a right angle to each other.

The high current connector 1 thus has an angled

Connector housing 2 on. In the connector housing 2 is a

High current contact element 3 was added, which is hidden in this illustration by the connector housing 2 and therefore not visible. However, the high current contact element 3 is clearly visible in FIG. Terminal side A, the insulating sleeve 4 is attached to the connector housing 2, wherein in this illustration, only the hollow cylindrical section 4.3 and the first increase 4.1 1 of the insulating sleeve 4 can be seen.

Through the insulating sleeve 4 is a high-current cable 5 with his

stripped end led. In the stripped area, the insulating sleeve 4 is pushed with its hollow cylindrical section 4.3 under a braided shield 5.1 of the high-current cable 5. The braid 5.1 is in

Connection area bent back by 180 °. The high-current cable 5 can be attached to the connector housing 2 in this area for strain relief and possibly for ground connection by means of a cable attachment, not shown in the drawing, namely a cable gland.

Fig. 3 shows a sectional view of the previous arrangement.

In this illustration, the high current cable 5 is very easy to see in cross section. Inside, it has an electrical conductor in the form of a stranded conductor 5.0. Above this is the strand insulation 5.3, which is removed on the connection side, i. On the connection side, the high-current cable 5 is stripped. On the strand insulation is usually the screen in the form of a shield braid 5.1. Above it is the jacket 5.2. of the high-current cable 5. The high-current cable 5 is partially stripped on the connection side. The stripped area is larger than the stripped area. In the intermediate region formed thereby, the braided screen is exposed in a section and can be 180 ° from

Connection area are bent away, as shown in the drawing.

In this sectional view is still the two-part

High current contact element 3 of the high current connector 1 to see well.

For Hochstromkontaktelement 3 includes a plug-in 3.1 with a connecting section 3.1 1 and a plug contact 3.12, in this Case designed as a socket contact, that is provided with a contact socket. In another embodiment, the plug-in area 3.1 could be provided at this point in the same way with a pin contact, the plug contact 3.12 so be designed as a contact pin.

Furthermore, the high-current contact element 3 has a connection region 3.2, which is designed in this case in crimping. In a further embodiment, however, it may also be an axial screw connection. The connection area 3.2 has for connection to the plug-in area a circular connection opening 3.0 in which the cylindrical connection section 3.1 1 of the plug-in area 3.1 is held positively and non-positively. The stripped stranded conductor 5.0 of the high-current cable 5 is electrically conductively connected within the high-current connector 1 to the connection region 3.2 of the high-current contact element 3 for current transmission in the form of a crimping or an axial screw connection.

As already explained with reference to FIG. 1, the insulating sleeve 4 has at its funnel-shaped fastening section 4.4 a gradation in the form of two elevations 4.1 1, 4.12. Between the two elevations 4.1 1, 4.12 an unspecified recess is formed. In this position, an unspecified, inside circumferential Befestigungsanformung the connector housing 2 snaps into place and thus fixes the insulating sleeve 4 on the connector housing 2. The anti-rotation 4.21, 422 are not visible in this illustration.

It is easy to imagine that the air and creepage distances between the connection area 3.2 and the stranded conductor 5.0 on the one hand and the cable mesh 5.1 and the cable gland on the other side is extended by the insulating sleeve 4. Finally, the shortest external electrical path through the air leads from the connection region 3.2 past the funnel-shaped attachment section 4.4 to a clear one Detour to cable mesh 5.1. The direct air gap passes through the insulating sleeve and undergoes an effective electrical path extension through the plastic material according to the associated

Dielectric constants.

Also increases the outer creepage distance, which must undergo the gradation in the form of the two elevations 4.1 1 and 4.12, so a much larger path travels to get from the connection area 3.2 to the cable mesh 5.1.

Cable connection side is the insulating sleeve 4 is pushed with its hollow cylindrical section 4.3 on the strand insulation 5.3 and is at least partially disposed between the braid 5.1 and the strand insulation 5.3. As a result, the inner creepage distance between the stripped stranded conductor 5.0 and the screen braid 5.1 of

Hochstromkabels 5 enlarged. Finally, the leakage current can not flow directly from the terminal region of the high current contact element 3 to the braided shield, but it must first the cylindrical

Completing Forming 4.3 completely.

It is easy to see that the outer and inner creepage distances are about the same length. This makes sense, because the creepage would anyway seek the shortest path.

The same applies in principle to the inner and the (effective) direct air gap, wherein the material thickness of the insulating sleeve 4 in the relevant area can also be made somewhat stronger for reasons of stability. However, this can not be easily understood from the drawing, since the length of the effective direct air gap does not coincide with its geometric length.

In the present embodiment, the cable mesh 5.1 is also off For clarity reasons shown relatively far away from the connection area 3.2. If the connector housing 2 is a plastic housing, then nevertheless the distance between the

Connection area 3.2 and the cable braid 5.1, bent back by 180 °, are relevant for clearances and creepage distances. If, however, it is an at least partially metallic connector housing 2, then this distance may still be relevant for the direct air gap, provided that the effective air gap between the high current contact element 3 and electrically conductive areas of the connector housing 2 is greater.

Thus, a compact design of Hochstromteckverbinders 1 is made possible by the insulating sleeve 4 according to the invention. Finally, a comparable high-current connector would have without this insulating sleeve 4 to achieve correspondingly large creepage distances and significantly larger dimensions. Conversely, this means that the insulating sleeve 4, the dimensions of the connector 1 are particularly compact.

Although various aspects or features of the invention are shown in combination in the figures, it will be apparent to those skilled in the art, unless stated otherwise, that the combinations illustrated and discussed are not the only ones possible. In particular, corresponding units or feature complexes from different embodiments can be exchanged with one another. High current connector with an insulating sleeve

LIST OF REFERENCE NUMBERS

1 high current connector

2 connector housings

3 high current contact element

3.0 connection opening

3.1 Plug-in area

3.1 1 connection section

3.12 plug contact

3.2 Connection area

4 insulating sleeve

4.1 1 first increase

4.12 second increase

4.21 first rotation lock

4.22 second rotation lock

4.3 hollow cylindrical section

4.4 fixing section

5 high current cables

5.0 stranded wire

5.1 screen braid

5.2 coat

5.3 Strand insulation

K Cable connection side of the insulating sleeve

G Housing connection side of the insulating sleeve

S Plug-in side of the high-current connector

A connection side of the high current connector

Claims

High current connector with an insulating sleeve claims

1 . High current connector (1), comprising a

Connector housing (2) and a high-current contact element (3), wherein the high-current connector (1) has a plug side (S) and a connection side (A),

wherein the high current contact element (3) inside the

Connector housing (2) is arranged,

wherein the high current contact element (3) has a plug-in region (3.1) and a connection region (3.2),

wherein an electrical conductor (5.0) of a high-current cable (5) can be connected to the connection region (3.2),

wherein the high current cable (5) by means of a cable attachment to the connection side (A) of the high current connector (1) can be fastened, characterized in that

the high-current connector (1) has an insulating sleeve (4) fastened to its connection side or at least attachable with a hollow-cylindrical section (4.3) on the cable connection side and a funnel-shaped connection on the side of the connection

Attachment section (4.4) to comply with specified air and

Creepage distances.

2. high-current connector (1) according to claim 1, characterized

characterized in that on an outside of the

Fixing section (4.4) a circumferential gradation (4.1 1, 4.12) is formed.

3. high-current connector (1) according to one of the above

Claims, characterized in that the circumferential Gradation consists of at least one circumferential increase (4.1 1, 4.12).

4. high-current connector (1) according to one of the preceding

Claims, characterized in that the circumferential gradation (4.1) consists of at least one circumferential recess.

5. high-current connector (1) according to one of the preceding

Claims, wherein the hollow cylindrical portion (4.3) of the insulating sleeve (4) at least partially between a

Strand insulation (5.3) and a braided shield (5.1) of the

Hochstromkabels (5) can be introduced.

6. high-current connector (1) according to one of the above

Claims, characterized in that the cable attachment is designed as a cable gland.

7. high-current connector (1) according to one of the preceding

Claims, characterized in that the insulating sleeve (4) has at least one rotation (4.21, 4.22).

8. high-current connector (1) according to one of the preceding

Claims, characterized in that the insulating sleeve (4) consists of an electrically insulating plastic.

9. high-current connector (1) according to one of the preceding

Claims, characterized in that the

High current connector (1) is executed angled.

10. high current connector (1) according to one of the preceding claims, characterized in that the

High current contact element (3) is made in two parts.

1 1. High-current connector (1) according to claim 10, characterized

in that the high-current contact element (3) is formed from a plug-in region (3.1) and a connection region (3.2), both made of metal.

12. high-current connector (1) according to one of claims 10 to

1 1, characterized in that the plug-in area (3.1) and the connection area (3.2) are electrically and mechanically connected to each other by a screw connection or by a Aufschrumpfverbindung.

13. High current connector (1) according to any one of claims 1 to 1

12, characterized in that the plug-in area (3.1) and the connection area (3.2) are connected at right angles to each other.

14. High-current connector (1) according to one of the preceding claims, characterized in that the

Connector housing (2) is at least partially formed of an electrically insulating plastic.

15. High-current connector (1) according to one of the preceding claims, characterized in that the

Connector housing (2) at least partially made of an electrically conductive material.

16. High current connector (1) according to claim 15, characterized in that the connector housing (2) consists at least partially of metal.