EP2826103A1

EP2826103A1 - Electric wall feedthrough for solar installations

Info

Publication number: EP2826103A1
Application number: EP13709191.4A
Authority: EP
Inventors: Mehmet Sagdic
Original assignee: Phoenix Contact GmbH and Co KG
Current assignee: Phoenix Contact GmbH and Co KG
Priority date: 2012-03-15
Filing date: 2013-03-12
Publication date: 2015-01-21
Also published as: AU2013231335A1; US20150047898A1; WO2013135698A1; JP2015513779A; DE202012013480U1; CN104205512A; CN104205512B; AU2013231335B2; JP6010142B2; US9413148B2; DE102012005043A1

Abstract

The invention relates to a wall feedthrough (1, 2), which is pluggable on one side, for connecting a voltage-conducting conductor (135) of a solar generator to a terminal housing, comprising: a two-part connector housing (102, 202) with a front housing part (104, 204) and an insert part (106) which can be moved together with an electric terminal element (114, 214) as one unit relative to the front housing part. The terminal element is pluggable on one side (118, 218) and has a spring clamp (120, 220) on the other side. The spring clamp is surrounded by a body casing (110, 210) of the front housing part in the closed state, and the clamping device (120, 220) is pulled out of the body casing (110, 210) in the open state so as to be openable and closable. For this purpose, the insert part has an exposed handle portion (150) for the user.

Description

Electric wall duct for solar systems

description

Field of the invention

The invention relates to a unilaterally pluggable electrical wall feedthrough for connecting a live cable of a solar generator to a connection housing, in particular to a junction box of the solar system, which should be compatible in particular with existing connector systems for solar systems.

Background of the invention

Solar modules are typically connected to strings, so-called strings, connected in series and depending on the size of the

Solar generator turn several strands are connected in parallel. The power cabling of the solar modules must meet a number of requirements for this purpose. On the one hand, phase voltages of currently up to 1000 volts are common and currents in the ampere range. Furthermore, the

Connecting cable at least partially outdoors, so that certain requirements to be met by the waterproofness. The applicant has developed for this purpose a connector system under the brand SUNCLIX®, which provided

Requirements fulfilled in an outstanding way. The

SUNCLIX® connector system includes single-pole electrical connectors with a metal contact element suitable for the necessary in the solar sector electrical voltages and currents is designed.

For solar systems, wall feedthroughs for electrical feed through a housing wall of a connection housing, e.g. one

Generator junction box housing needed. Thus, it may be desirable to install a connector directly into a wall of the connection housing, so that the mating connector can be plugged directly into the housing.

From DE 10 2011 112 283 this is a double-sided pluggable single-pole electrical wall bushing for

Wiring of solar systems described. Such

Feedthroughs may e.g. be used for generator junction boxes. Such a double-sided pluggable

Wall bushing is very easy for the user to use. However, this also represents a relative

complex solution, which also has a high

Requires space within the connection housing, on the other hand, by the advantages of the two-sided

Plug connection is not always balanced. In DE 10 2010 034 881 is a wall mountable

described electrical connector with a multi-part housing. Although this connector is suitable for a variety of application fields, e.g. the simplicity of operation and compatibility for certain

Applications in solar technology can be further improved.

Due to the great cost pressure, it is further

desirable, on the one hand, the production, storage and To keep the logistics costs of a connector system for photovoltaic systems as low as possible, and on the other hand, the installation in the wiring of

Solar systems flexible, but still easy and

failsafe design.

General description of the invention

It is therefore an object of the invention to provide an electrical wall feedthrough for connecting a live cable of a solar generator to a connection housing, in particular to a terminal box of the solar system, which is easy to use and requires a small footprint. Another aspect of the job is to be free

ready-to-fit wall bushing to provide to which a conductor on the inside of the housing in the installed state can be easily and reversibly connected and disconnected again.

Another aspect of the object is to provide such a wall bushing, which with as few new components in an existing

Connector system can be integrated.

Another aspect of the object is to provide such a wall bushing, which is a high

Contact reliability and good protection against moisture ingress into the connector housing.

The object of the invention is solved by the subject matter of the independent claims. Advantageous developments of the invention are defined in the subclaims. According to the invention, a unipolar plug-in single-wall feedthrough for connecting a live cable of a solar generator to a connection housing, in particular a connection box, is provided. The wall feedthrough comprises an insulating

Connector housing with an external stop or

Stop collar and a fastening portion, e.g. a threaded section. The connector housing is connected to a separate cooperating with the mounting portion

Fastener mounted in an opening in a wall of the terminal box housing, e.g. by screwing a fastening nut with the threaded portion of

Connector housing, wherein the wall of the

Terminal box housing between the stop and the

Clamping element is clamped.

The connector housing is further formed at least in two parts. The connector housing includes, as a first part, a front housing part facing outward with respect to the terminal box housing and having a front side part

Connector section, in the form of a housing plug pin or a housing plug socket, with a fuselage sleeve for

Inserting in an opening of the wall of the connection housing or the terminal box housing and with the between the plug portion and the mounting portion of the

Hull sleeve arranged stop collar, the

Connector housing with the stop collar on the one hand and the fastener on the other hand set in the opening, in particular screwed. The connector housing comprises as a second part of a plastic insert part, which in the preferably one-piece front housing part whose rearward the plug portion opposite axial end is inserted.

Within the connector housing axially extends a metal electrical connection element, which comprises a front metal plug-in contact and a rear clamping device for a stripped conductor end. With the rear clamping device, in particular in the form of a spring-loaded terminal, the stripped conductor end can be reversibly and non-destructively released and again

be connected. The stripped conductor end is by means of the connecting element, which in the

built-in state through the opening across the

Housing wall extends through, electrically with the

Metal plug contact connected when the conductor end is clamped in the clamping device to the installed and mated state of the conductor in the

Terminal box housing with a mating connector outside the terminal box housing to electrically

connect .

The electrical connection element is within the

preferably one-piece plastic insert

fixed, e.g. locked. The insert part becomes

guided longitudinally displaceable in the fuselage sleeve, so that the insert part together with the specified therein

electrical connection element as a unit between an inserted into the fuselage sleeve closed state of the connector housing and a solid open state of the connector housing reversibly inserted and

is extendable. In the closed state of the connector housing, the clamping device is surrounded by the front housing part or its rear body shell, so that it is completely housed and the metal plug contact is located in the front-side plug portion of the front housing part, mated with a complementary metal plug contact of the complementary mating connector to be able to.

When opening the connector housing, the insert with the connection element fixed therein a piece far, typically a few inches, to the rear of the

Front housing part pulled out. In the opened state of the connector housing, therefore, the metal plug contact is at least partially pulled out of the plug portion to the rear and the clamping device is out of

Fuselage sleeve pulled out so far that they through the

User can be opened and closed. at

Use of a spring clamp is this at least as far pulled out of the fuselage sleeve, that the

Clamping spring can be opened and closed by the user.

For connecting the rear stripped conductor end in the open state, therefore, the conductor end in the clamping device, which in particular as

Spring terminal is formed, introduced from behind, then closed the clamping device and

Subsequently, the insert part inserted into the front housing part in the direction of the connector portion to close the connector housing. The wall bushing can therefore be freely assembled by the user. The

Spring terminal may optionally be configured such that the stripped conductor end not only in the open, but also in the closed spring terminal

can be introduced. This is often called

Direct plug technique called. Such

Spring terminal with direct plug technique is e.g. described in DE 10 2008 061 268, which hereby by

Reference is incorporated. The insertion of the insert in the front housing part and pulling out of the

Front housing part can be reversible in the installed in the opening of the wall of the terminal box housing state.

The wall bushing accordingly has a connector at one of the two axial ends and a spring-loaded terminal clasped in the connector housing at the other axial end.

The wall bushing can therefore be advantageously reversibly separated and reconnected on both sides on the outside of the terminal box housing by means of the connector and on the inside of the

Terminal box housing by means of the spring clamp, which can be pulled out of the front housing part, both in the installed state.

In an advantageous manner, furthermore, a short design can be achieved, so that the space requirement in the

Terminal box housing is relatively low. Nevertheless, the wall bushing is very easy to use by the user, freely assembled and reliable contact.

In addition, due to the short design both on the junction box inside and on the inside Terminal box housing outside the lever forces on the screwed in the opening wall bushing relatively low. Finally, the wall bushing can be integrated compatible with an existing solar connector system and some components can be taken over from the existing connector system or just need

to be slightly modified.

Preferably, the connection element tapers between the clamping device and the metal plug contact and the front housing part has a complementary taper of the inner channel, in which the connection element is displaced axially. In the closed state of the

The connector housing closes the terminal relatively watertightly with the front housing part by engagement of the tapered portions. Further

Preferably, the connecting element is stamped from sheet metal and hollow and it is used as a shock protection a plastic plug in the hollow male

Plugged in metal plug.

Preferably, the fuselage sleeve at its the

Plug portion of the front housing part axially

opposite end to a rear sleeve portion, so that the fixing portion between the

Sleeve portion and the stop collar is arranged. In the closed state, the rear is

Clamping device preferably at least partially enclosed by the rear sleeve portion. Advantageously, this can be the greater part of the overall length of the wall duct in the closed state on the Inside the terminal box housing are located. In other words, the axial length of the

Fixing portion, the sleeve portion and a grip portion of the insert part together greater than or equal to the length of the plug portion or greater than or equal to the total length of that connector portion, which in the installed state on the outside of the

Housing wall protrudes. As a result, relatively large leverage forces can be absorbed on the outer connector.

Preferably, the insert part in the region of

Clamping device on a central portion which has a substantially U-shaped cross-section and is radially open after at least one side. The

Clamping device is further preferably formed as a with respect to the connector housing radially actuated spring force terminal of a holding frame and a pivotally mounted in the holding frame clamping spring. The

Spring terminal, more specifically its holding frame

Preferably set in the central portion, such that the clamping spring exposed by the radially open side of the U-shaped cross-section for actuation, that the

Spring terminal can be reversibly opened and closed by the user when the connector housing is in the open state.

As a result, the clamping device for the user

especially easy to use, even if the

Wall bushing is screwed in the opening of the terminal box housing. According to a preferred embodiment, the

Clamping spring and the holding frame of the spring terminal on each other complementary locking means, by means of which the clamping spring in the closed state of

Spring terminal is latched to the holding frame, whereby a high contact reliability of the clamping device is ensured.

In the closed state of the spring force terminal and the connector housing, the clamping spring is preferably

in addition to the latch still so tightly enclosed by the holding frame of the fuselage sleeve, that the fuselage sleeve prevents the clamping spring from popping up. As a result, the contact reliability can be further increased and the size can be kept small.

In particular, the clamping spring has an actuating leg for finger actuation by a user

Clamping leg for clamping the stripped conductor end to a busbar of the holding frame and a

Knee section which connects the actuating leg with the clamping leg, on. The clamping spring is further preferably pivotally mounted in the holding frame in the region of the knee section. The actuating leg is locked in the closed state with the holding frame, e.g. by lateral locking projections on the actuating limb, which engage under latching hooks on the holding frame. The actuating leg and the clamping leg have from the pivot axis in the direction of the connector portion (forward) and the actuating arm is in the closed

State of the fuselage sleeve thereby secured against cracking, that the actuating leg on the inside of the fuselage sleeve, preferably axially in the region of Threaded section, applied. Preferably, the

Clamping leg so elastically resilient designed that even in the closed state of the spring terminal, the stripped conductor end from behind under springs of the

Clamping leg can be inserted

(Direct plug-in technology), whereby a high level of operating comfort is achieved by different operating options.

According to an advantageous embodiment of the invention, the insert part has a at its rear end

(which is axially opposite the male portion of the connector housing) has a rearward handle portion at which the user can grasp and insert the insert into the body sleeve and pull it out of the body sleeve. For this purpose, the grip section preferably has an at least partially encircling outer reefing.

As a result, the insertion and withdrawal of the

Insert in or out of the front housing part

facilitated .

The integrally formed with the plastic insert part handle portion forms in particular the rear end of the wall bushing and is exposed even in the closed state of the connector housing. In other words can be dispensed with a rear union nut.

Preferably, in the closed state of the connector housing, the handle portion is axially adjacent to the sleeve portion of the body sleeve. Possibly. the grip portion and the sleeve portion abut each other directly, so that the rear end of the fuselage sleeve forms a stop for the handle portion when inserted. The outer diameter of the handle portion, in particular the corrugation should be chosen to be smaller than or equal to the diameter of the mounting portion of the fuselage sleeve, so that the connector housing with the inserted into the front housing part insert as a preassembled unit

together through the opening in the wall of the

Terminal box housing can be inserted. Preferably, the grip portion or the outer diameter of the corrugation in the closed state of the runs

Connector housing externally flush with the sleeve portion of the fuselage.

This has the advantage that the front housing part and the insert part can already be assembled at the factory and delivered to the customer as a preconfigured contiguous assembly and / or mounted as such.

Preferably, the handle portion at its the

Plug portion of the front housing part axially

opposite (rear) end of an inner

Insertion funnel for the conductor end, which tapers in the direction of the clamping device. As a result, the introduction of the stripped conductor end can be facilitated. In order to guide the insert well during insertion and withdrawal, extends at least one retaining tab from the rear end of the fuselage sleeve axially to the rear and slides when moving the insert in the fuselage sleeve on a sliding surface of the insert along.

Preferably, the corrugation of the handle portion is interrupted on the sliding surface and in the closed

State, the retaining tab extends axially into the Corrugation into it. As a result, the length can be small

being held.

The insert is in the closed state of

Connector housing with the front housing part locked.

As a result, an unintentional withdrawal of the

Insert part from the front housing part prevents, for example, without still an additional screw connection is necessary. For this purpose, preferably, the at least one retaining tab on an opening, which in the closed state on a rear locking projection in the sliding surface

locks. Further preferably, at least one

Retaining tab on an opening, which in the open state on a front in the sliding surface

arranged latching projection engages. As a result, both the open and the closed state are secured against unintentional displacement of the insert relative to the front housing part, since only the locking must be solved or overcome.

According to a preferred embodiment of the invention, at least two radially opposite retaining tabs extend axially from the rear end of the fuselage sleeve to the rear, which on displacement of the insert part in the fuselage sleeve on two radially opposite

Slide the sliding surfaces of the insert along. Of these, however, only one of the sliding surfaces on a rear locking projection.

This allows the user to lock in the

closed state of the connector housing, for example with a tool, such as a screwdriver with a single Release handle, thereby releasing the latch

is relieved.

The direction designations "front" / "front side" resp.

"Rear" / "rearward" refer to the longitudinal axis of the wall duct which, when installed, is transverse to the wall of the junction box housing. "Front" or "front" refers to the side with the connector section, typically on the outside of the junction box housing is arranged and "rear" or "rearward" on the connector portion axially

opposite side of the wall duct, where the

Clamping device is arranged and which itself

typically on the inside of the

Terminal box housing is located.

In the following the invention is based on

Embodiments and explained in more detail with reference to the figures, wherein the same and similar elements are partially provided with the same reference numerals and the features of the various embodiments can be combined.

Brief description of the figures

Show it:

Fig. La to lj a wall bushing according to the invention with female plug contact in the open state

different views as follows:

1a perspective view from obliquely behind right, Fig. Lb perspective view obliquely from the rear left, Fig. Lc view from below,

Fig. Ld side view from the right, Fig. Le top view,

Fig. Lf side view from the left,

1 g shows a section along the line A-A in FIG.

Fig. Lh view from the rear,

Fig. Ii view from the front,

Fig. Ij section along the line B-B in Fig. Ii,

Fig. 2j a section corresponding to Fig. Lj with

closed spring clamp and inserted conductor,

Fig. 3j is a section corresponding to Fig. 2j, but with

Fig. 4a is a perspective view obliquely from behind

to the right of one to Fig. 1-3 complementary

Wall bushing with male plug contact, Fig. 4d, the wall bushing of Fig. 4a in side view from the right,

Fig. 4j is a longitudinal section corresponding to Fig. 3j, but

through the wall bushing according to Fig. 4a and

Fig. 4d,

5a is a perspective view obliquely rear right of the front housing part of the wall bushing of Fig. 4a with mounting nut,

6a to 6f, the insert for the wall bushing of FIG. 4 with fixed male connection element in different views as follows:

Fig. 6a perspective view of obliquely behind

right , 6b perspective view of obliquely front left,

6c view from below,

6d side view from the right,

Fig. 6e top view,

6f side view from the left,

Fig. 7 is an illustration of a terminal box housing with a plurality of built-in invention

Wall penetrations.

Detailed description of the invention

Figures la to lj show an inventive

Wall bushing 1 with a female plug contact. The wall bushing 1 has a two-part connector housing 102, which consists of a front housing part 104 with a front-side connector portion and a rear

Insert 106 exists, which is inserted into the front housing part 104 from the rear and in the front housing part along a longitudinal axis 3 of the wall bushing (axially) is displaceable. The one-piece front housing part 104 has a front-side plug portion 144 and a rear fuselage sleeve 110 and one between the

Plug portion 144 and the fuselage sleeve 110 arranged

Stop collar 107 on. The hull sleeve 110 is in a subsequent to the rear of the stop collar 107

External thread and a subsequent behind the threaded portion 108 sleeve portion 112 divided. Accordingly, the body shell consists essentially of the

Threaded portion 108 and the smooth sleeve portion 112, which extends the threaded portion to the rear. Fig. Lj shows the wall duct with open

Connector housing and open spring clamp. The

Connection element 114 is latched by means of two latching hooks 116 of the insert part 106 in the insert part 106 and thus fixed and fixed. The connection element 114 consists of a front-side plug contact 118 and a

rückwärtigen spring terminal 120. The holding frame 122 of the spring-loaded terminal is integrally stamped and formed with the plug contact 118, wherein the holding frame in

Essentially U-shaped and the plug contact are hollow. The clamping spring 124 is pivotable about a

transversely mounted pivot axis 125 in the holding frame 122 and has an actuating leg 126, a clamping leg 128 and the two legs 126, 128 connecting knee section 130.

The stop collar 107 has an annular rear stop surface 107a. The wall bushing 1 is inserted into the opening 134 of the housing wall 131 with the insert part 106 and the body sleeve 110 and subsequently fastened with the fastening nut 132. In this installed state, the wall 131 is clamped between the abutment surface 107a of the stop collar 107 and the fastening nut 132 in order to fix the wall passage in the opening 134 in the wall 131. The wall bushing 1 is sealed with a ring seal 133 around the fuselage sleeve 110 between the stop collar 107 and the fastening nut 132. For this purpose, the threaded portion 108 extends from the rear almost to the stop surface 107 a of the stop collar 107th

Referring to Fig. 2j, the stripped conductor end 136 is inserted from the rear into the spring force terminal 120 and the user can clamp the spring 124 from above through the radial opening 138 of the U-shaped central portion 140 of the insert 106, for example, with a finger pressure

close, wherein the clamping spring 124 is locked in the holding frame 122. Subsequently, the insert 106 of the

Inserted user with the connection element 114 defined therein in the channel 142 in the front housing part 104, at the same time the plug-in contact 118 is automatically inserted into the front-side connector portion 144. The integrally molded plastic insert 106 forms a unit with the connector 114 defined therein, which as a whole is relative to the front housing 104

is moved. When inserting the insert 106 into the front housing part 104 from the open to the

closed state of the connector housing 102, the spring clamp 120 shifts from a position behind and outside the fuselage sleeve 110 in the fuselage sleeve in this example, at least partially into the threaded portion 108. In the closed state of the connector housing 102, the spring clamp 120 extends axially until in the threaded portion 108, more specifically, the spring clamp 120 is axially in a position within the sleeve portion 112 and the threaded portion 108. Fig. 3j shows the retracted state of the insert 106, ie the closed state of the connector housing 102 in which a non-illustrated mating connector with the wall bushing 1 can be connected. The

Connection element 114 has between the plug contact 118 and the spring terminal 120 a Verjüngungsstelle 146, which tapers forwardly and is arranged in the closed state of the connector housing 102 in the Verjüngungsstelle 148 of the front housing part 104. To insert the insert 106 into the channel 142 extending axially through the front housing 104, the insert 106 has a rear handle portion 150 adjacent to the central portion 140. The handle portion 150 has a substantially

round cylindrical shape. The diameter of the grip portion 150 is larger than that of the inner diameter of the channel 142 in the front housing part 104, so that the grip part 150 can not slip into the front housing part 104.

Furthermore, the handle portion 150 has on its outer circumference an at least partially circular around the longitudinal axis 3 encircling the handle surface 151 with an interrupted circulating circumferential reefing 152. Thus, the user in the open and closed state of the

Connector housing grip the handle portion 150 with your thumb and forefinger to insert the insert 106 into the channel 142 of the front housing part 104 and pull out again. Both is possible in the installed state in the wall opening 134, possibly even if the mating connector, not shown, is attached. Of the

Users can therefore at any time the insert or insert 106 again pulled out of the front housing part 104 until the spring terminal 120 is released and the

Spring terminal 120 in this open state of the

Open connector housing 102 again to release the conductor end 136 again. Thus, a conductor end 136 can be connected and disconnected almost indefinitely, or the conductor 135 can be freely assembled, reversibly

be connected and replaced at any time.

The fastening nut 132 is relatively short in the axial direction. The fastening nut 132 has an axial Length, which is shorter than the length of the hull sleeve 110, measured from the stop collar 107 to the rear end 104 a of the front housing part 104, is. In the shown

Embodiment, the length of the

Mounting nut 132 only about a quarter of the length of the fuselage sleeve 110, measured from the stop collar 107 to the rear end 104 a of the front housing part. The

Fixing nut and the threaded portion 108 are in the closed state of the connector housing 102 axially in the front region of the spring terminal 120th

In particular, the fastening nut 132 does not extend to the rear in the installed state

Handle portion 150 and especially not on the rear end 150 a of the handle portion 150 addition, so that the

Handle portion 150 remains freely accessible to the user. The fastening nut 132 or the fastening element is merely an ordinary nut and in particular no hat-shaped cap part with internal thread. The

Fastener therefore does not have the particular

Function to close the connector housing 102 backward.

The grip portion 150 has a front stopper 153, which in the closed state of

Connector housing 102 on the back 110 a of the fuselage sleeve 110 rests. The handle portion 150 of the insert 106 thus protrudes both in the open and in the

closed state of the connector housing 102 out of the front housing part 104 and out of the fuselage sleeve 110, so is free to be grasped by the user can. Accordingly, the insert 106 will not be completely in the closed state even in the

Connector housing 102 included. Consequently, the

Handle surface 151 of the handle portion 150 in the open and closed state of the

Connector housing 102 freely accessible to the user tangible, especially tangible from two radially opposite sides.

Referring again to FIGS. 1a and 1b, FIG

Actuating legs 126 of the clamping spring 124 two lateral locking tabs 154, which under latching hook 156 of

Latch lateral flanks 158 of the support frame 122. This locking can by means of a in the

Actuating leg 126 stamped opening 160th

be levered so that the spring clamp terminal can be reversibly closed and reopened by the user.

Referring again to Fig. 3j, the

Actuating leg 126 of the clamping spring 124 in addition to the latching with the support frame 122 in the closed state of the connector housing 102 by contact with the

Inside 142 a of the channel 142 secured against cracking.

The outer diameter of the handle portion 150 and the transverse corrugation 152 is approximately equal to the

Outside diameter of the sleeve portion 112 to the insertion of the preassembled connector housing 102 in the

Wall opening 134 to facilitate. In other words, the sleeve portion 112 extends outwardly substantially flush with the handle portion 150. For ease of insertion of the conductor end 136, the handle portion 150 has a rearward inner

Insertion funnel 162, which tapers from back to front. The insertion funnel 162 is rigid and needs no clamping function to fulfill. The clamping of the conductor 135 within the terminal box housing takes place

exclusively with the spring-loaded terminal 120, which clamps the stripped conductor end 136 against the busbar 123 of the holding frame 122. The conductor 135 is therefore loose in the insertion funnel 162.

Referring again to FIGS. 1 d and 1 f, FIG

Front housing part 104 rearward directly on the

Sleeve section 112 to the rear subsequent retaining tabs 164a, b. The retaining tabs 164a, b slide during

Moving the insert 106 on sliding surfaces

166a, b on both sides of the insert 106. The sliding surfaces 166a, b extend axially at least over the

Center section 140 and into the corrugation 152 inside, which is interrupted for this purpose on the sliding surfaces 166a, b. Both retaining tabs 164a, b each have a latching opening 168a, b. The sliding surfaces 166a, b have front side locking projections 176a, b, which in the

open state of the connector housing (Fig. La to lj) in the openings 168a, b of the retaining tabs 164a, b engage. However, only one of the two sliding surfaces exhibits

166a, b, in this example the left sliding surface 166b seen from the rear, has a rear locking projection 170b which, in the closed state of the connector housing, snaps into the opening 168b of the left retaining tab 164b when the connector housing 102 is closed. The only one-sided locking in the closed state can be solved in an advantageous manner with just a hand. For this purpose, the insert 106 behind the rear

Locking projection 170b a recess or groove 172b for

Inserting a screwdriver and levering the Locking between the opening 168b and the rear

Latching projection 170b on.

FIGS. 4a, 4d and 4j show a complementary one

Wall bushing 2 with a connection element 214 with male plug contact 218. The formed of sheet metal plug contact 218 is closed with a plastic plug 219, which serves as a contact protection. Incidentally, the male wall bushing 2 is corresponding to the

built female wall bushing 1, wherein

corresponding parts are provided with reference numerals, which instead of the 10 Oer numbers have 20 Oer numbers and the one and ten digits are the same. Fig. 5a shows the front housing part 204 of the male

Wall duct 2.

FIGS. 6a to 6f show the insert part 106 with a male connection element 214 fixed therein. The internal geometry of the channel 142, 242 is both

Wall bushings 1, 2 as far as they cooperates with the insert 106 is formed the same, so that the same

Plastic insert 106 for both the male

Connection element 214 and the male wall bushing 2 and for the female connection element 114 and the female wall bushing 1 can be used. So there is only one sort of insert 106 for both

Wall bushings 1 and 2 (male and female)

manufactured and kept, thereby reducing costs

can be saved.

The insert 106 further includes a front

Holding portion 173 with two radially opposite front cantilever and resilient guide tabs 174 which continue the two sliding surfaces 166a, b forward and guide the insert 106 in the channel 142 of the front housing 104. The front locking projections 176a, b are arranged on the outer sides of the guide plates 174 and lock when pulling the insert 106 into latching openings 168a, b of the front housing part 104 in order to prevent complete withdrawal of the insert 106. In the illustrated example, the front locking projections 176a, b latch in the openings 168a, 168b of the retaining tabs 164a, 164b, whereby a particularly short design can be achieved.

The insert 106 thus consists of three sections, the front holding section 173, which also in the open

State remains in the front housing part 104, which can be inserted into the front housing part 104 and out of the

Front housing part 104 extractable center section 140 and the not in the front housing part 104 insertable handle portion 150. The three sections are made in one piece from plastic.

Referring again to FIGS. 3j, 4j, in the installed and closed state of the connector housing, the rear part (which is in the installed state on the inner side 4a of the terminal box housing 4) includes

Threaded portion 108, 208, the sleeve portion 112, 212 and the handle portion 150 longer than the plug portion 144, 244 on the outside 4 b of the terminal box housing 4. Further, the clamping device 120 is in the closed state of the connector housing 102, at least for the most part at the rear of the stop collar 7 and the installed state on the inside of the 4a Terminal box housing 4 (Figure 7). The plug portion 144, 244 has between the stop collar 107, 207 and the housing plug pin 105 and the Gehäusesteckbuchse 205 still an outer polygonal geometry 180, 280 to the front housing part 104, for example, with an open-end wrench

Locking the fastening nut 132, 232 rotatably hold.

The insert 106 includes a front

Guide portion 178 with the two guide tabs 174, a central portion 140 having a substantially U-shaped cross-section for accessing the clamping spring 124 and the rear substantially cylindrical handle portion 150, which are integrally molded as a part.

The plug contact 118, 218 protrudes - essentially

completely - from the rear end 106a of the

Insert part 106 and the rear end 150a of the

Handle portion 150 opposite front end 106 b of the insert part 106 out to be inserted into the plug portion 144 and 244 can.

The self-supporting suspended guide tabs 174 form a forward portion 184 of the sliding surface and extend the sliding surfaces 166a, b forwardly. The forward portion 184 of the sliding surface is separated from the associated sliding surface 166a, b by a narrow gap 182, respectively. Otherwise, the displacement of the insert 106 relative to the front housing part 104 by the

Retaining tabs 164a, b on the one hand and the sliding surfaces 166a, b including the front part 184 out to a good linear guide over the entire

Displacement of the insert 106 in the Front housing part 104 from the open to the

closed state of the connector housing 102 to

accomplish. Fig. 7 shows schematically the installation of several

Wall bushings according to the invention in the wall 131 of a terminal box housing 4.

It will be apparent to those skilled in the art that the above-described embodiments are to be read by way of example, and that the invention is not limited thereto, but that it can be varied in many ways without departing from the scope of the claims. Further, regardless of whether they are in the specification, claims, figures or otherwise disclosed, the features also individually define essential components of the invention, even when described together with other features.

Claims

Single-sided plug-in wall feed-through (1, 2) for

Connecting a live conductor (135) of a solar generator to a connection housing

full :

an insulating connector housing (102, 202) with a stop (107, 207) and a

Fixing portion (108, 208),

an electrical connection element (114, 214) extending axially within the connector housing and

a fastening element (132, 232),

wherein the connector housing at least two parts

i) a front housing part (104, 204) with a front-side connector portion (144, 244) in the form of a housing plug pin or a

A housing plug socket, a trunk sleeve (110, 210) for insertion into an opening (134) of a wall (131) of the connection housing and the stop, wherein the

Connector housing with the stop on the one hand and the fastener on the other hand in the opening

is definable and

ii) an inserted into the front housing part (104, 204) at the rear of the plug portion (144, 244) opposite axial end

Insert part (106) is formed,

wherein the electrical connection element (114, 214) has a front-side plug contact (118, 218) and a rear clamping device (120, 220) for a

Conductor end includes to electrically connect the conductor end (136) to the plug contact when the conductor end is clamped in the clamping device, wherein the electrical connection element (114, 214) within the insert (106) is fixed and the insert is longitudinally displaceably guided in the fuselage sleeve (110, 210), so that the insert part (106) together with the therein electrical

Connection element (114, 214) between a in the

Fuselage sleeve inserted closed state of the connector housing and an extended open state of the connector housing (102, 202) is reversibly inserted and retractable,

such that in the closed state the clamping device (120, 220) is surrounded by the body sleeve (110, 210) and the plug contact (118, 218) is in the plug portion (144, 244) mating with a mating male contact of a mating connector to be able to, and

so that in the open state of

Plug contact (118, 218) at least partially pulled out of the plug portion (144, 244) and the clamping device (120, 220) is pulled out of the fuselage sleeve (110, 210) in order to be able to be opened and closed. 2. Wall bushing (1, 2) according to claim 1, wherein the

Hull sleeve (110, 210) at its the plug portion (144, 244) of the front housing part axially

opposite end has a sleeve portion (112, 212), so that the fastening portion (108, 208) between the sleeve portion (112, 212) and the

Stop (107, 207) is arranged and in the

closed state of the sleeve section the

rearward clamping device (120, 220) at least partially encloses.

Wall bushing (1, 2) according to one of the preceding claims, wherein the insert part (106) in the region of the clamping device (120, 220) has a central portion (140) with a substantially U-shaped cross section, wherein the clamping device as a with respect Connector housing radially actuated spring terminal from a holding frame (122, 222) and a pivotally mounted in the holding frame clamping spring (124, 224) is formed, wherein the holding frame is fixed in the central portion and the clamping spring radially through the radially open side of the U-shaped cross-section is exposed and the spring terminal is reversible to open and close when the

Connector housing (102, 202) is in the open state.

Wall bushing (1, 2) according to claim 3,

wherein the clamping spring (124, 224) and the holding frame (122, 222) of the spring-loaded terminal to each other

complementary locking means (154, 254, 156, 256)

have, by means of which the clamping spring in

closed state of the spring terminal is latched to the holding frame.

Wall bushing (1, 2) according to claim 4,

wherein in the closed state of the spring-loaded terminal and the connector housing, the clamping spring (124, 224) in addition to the latching with the holding frame of the fuselage sleeve (110, 210) is so closely enclosed that the fuselage sleeve a popping of the clamping spring prevented.

Wall bushing (1, 2) according to claim 3, 4 or 5, wherein the clamping spring (124, 224) a

An actuating leg (126, 226) for finger actuation by a user, a clamping leg (128, 228) for clamping the stripped conductor end (136) to a bus bar (123, 223) of the support frame (122, 222) and a knee section (130, 230) which the

Connecting actuating leg with the clamping leg, wherein the clamping spring in the region of

Knee section is pivotally mounted in the holding frame, the actuating leg in the closed

Condition is locked to the holding frame, the

Actuating leg and the clamping leg of the pivot axis (125, 225) in the direction of

Plug portion (144, 244) point and the

Actuating leg in the closed state of the fuselage sleeve (110, 210) is secured against cracking.

A grommet (1, 2) according to any one of the preceding claims, wherein the insert member (106) has a grip portion (150) at its rear end axially opposed to the plug portion (144, 244) of the connector housing, at which the user inserts the insert (106) for insertion into the fuselage sleeve (110, 210) and pulling out of the fuselage sleeve can hold.

Wall bushing (1, 2) according to claim 7,

wherein the handle portion (150) at least partially having circumferential outer Riffeiung (152).

9. wall bushing (1, 2) according to claim 7 or 8,

wherein the handle portion (150) in the closed state of the connector housing (102, 202) to the sleeve portion (112, 212) of the fuselage sleeve is axially adjacent and the outer diameter of the handle portion (150) is less than or equal to the diameter of the attachment portion of the fuselage sleeve.

10. Wall duct (1, 2) according to claim 7, 8 or 9,

wherein the handle portion (150) in the closed state of the connector housing (102, 202) to the sleeve portion (112, 212) of the fuselage sleeve is axially adjacent and the outer diameter of the handle portion (150) is greater than the inner diameter of the sleeve portion (112, 212) ,

11. Wall bushing (1, 2) according to one of claims 7 to 10, wherein the handle portion (150) in the closed

State of the connector housing outwardly flush with the sleeve portion (112, 212) of the fuselage sleeve extends.

12. Wall duct (1, 2) according to one of the preceding

Claims, wherein the handle portion (150) at its the

Plug portion (144, 244) of the front housing part axially opposite end has an inner insertion funnel (162) for the conductor end (136), which tapers in the direction of the clamping device (120, 220).

13. Wall bushing (1, 2) according to one of the preceding

Claims, wherein at least one retaining tab

(164a, b, 264a, b) from the rear end of the fuselage sleeve (110, 210) extends axially rearwardly, which slides upon sliding of the insert part in the fuselage sleeve on a sliding surface (166a, b) of the insert part (106) along.

14. Wall duct (1, 2) according to claim 13,

wherein the corrugation (152) of the handle portion (150) is interrupted at the sliding surface and in the closed state, the retaining tab extends axially into the corrugation.

15. Wall duct (1, 2) according to claim 13 or 14,

wherein the at least one retaining tab an opening

(168b, 268b) which, in the closed state of the connector housing (102, 202), is latched on a rear detent projection (170b) in the sliding surface (166b).

16 wall duct (1, 2) according to claim 15,

wherein at least one opening (168a, b) in the

Retaining tabs in the open state of the

Connector housing (102, 202) on at least one in the sliding surface (166 a, b) arranged front

Locking projection (176a, b) is engaged.

17. Wall bushing (1, 2) according to one of the preceding

Claims, wherein at least two radially

opposing retaining tabs (164a, b, 264a, b) extend axially rearwardly from the rearward end of the body sleeve (110, 210), which upon displacement of the

Insert insert (106) in the fuselage sleeve on two radially opposite sliding surfaces (166a, b, 266a, b) of the insert slide along, but only on one of the sliding surfaces is a rear locking projection (170b) is present.