DE3309110A1 - THROTTLE OR TRANSFORMER, ESPECIALLY AS A CONTROL UNIT FOR GAS DISCHARGE LAMPS - Google Patents

Abstract

1. A choke or transformer, especially for use in series-connected appliances for gas discharge lamps, with a plate pack (5) constituted by a core (6) and a jacket (7) and composed of plate laminae, the winding of which pack is on the core (6) and insulated therefrom and from the jacket (7), while on each side upon the winding parts (winding overhangs (1a, 2a)) protruding on both sides beyond the plate pack (5) there is set a one-piece insulating material moulding (8) which comprise a tongue (9) pushed into the interspace between the core (6) and the protruding winding parts and an outer wall (10) lying before the protruding winding parts and connected with the tongue (9) by an upper wall part (11), and openings defined by this outer wall (10) and the adjacent end wall of the plate pack (5) are covered by cover parts connected with the plate pack - for example formed wholly or partially by an assembly bar - and/or by side walls (12) of the insulating material mouldings (8), characterized in that in the case of a winding of at least two coils (1, 2) fitted into one another, that is lying in one winding plane, the insulating material mouldings (8) comprise partitions (16) connected with the upper wall part (11), extending between the winding overhangs (1a, 2a) of two adjacent coils (1, 2), extending in the region between the tongue (9) and the outer wall (8) approximately parallel to the tongue (9) and insulating these winding overhangs (1a, 2a) from one another (Figures 1-4).

Description

Schwa b e GmbH & Co. KG Electrotechnical Factory, Wasenstrasse 25, 7067 Urbach

Choke or transformer, in particular as a ballast for gas discharge lamps

The invention relates to a choke or a transformer, in particular as a ballast for gas discharge lamps, with a core and a Coating consisting of sheet metal lamellas, as well as with one placed on the core and against this and the jacket insulated winding, on the winding heads each independent Molded insulating parts are placed laterally, one in the space between the core and the each end winding have an inserted tongue and an outer wall in front of the end winding, openings through which are bounded by the outer wall and the adjacent end wall of the laminated core connected to the laminated core, optionally formed entirely or partially by a mounting rail Cover parts and / or molded parts by side walls of the Isolierstof are covered.

In a known from DE-PS 22 44 158 throttle of this type are on the winding heads in the form an insulated coil formed winding, pushed-on molded insulating material as one-piece, formed on the laminated core adjacent insulating housing, which with the respective adjacent

Front wall of the laminated core delimit a lower opening through a with the laminated core connected mounting rail is covered. This insulating housing result in an essential Simplifying the insulation of the winding, because after winding the coil on the in areas their legs simply put on a coil insulated by means of a foil cover the wire ends of the coil to connection devices present on the insulating material housings connected before the whole thing is placed on the core.

With so-called symmetrical chokes or with transformers, their winding consists of several If there is coils, the end windings must also be isolated from one another. These are this known insulating housing is not set up, which means that own separate Intermediate layers or the like. Would have to be provided, the assembly of which an additional considerable Would require effort.

A perfect insulation of the winding heads of the individual coils against each other is at a choke or a transformer guaranteed, as it is from DE-PS 2161 635 is known. The individual elongated winding coils are made of plastic bestchcMide trough-like housing inserted, which is characterized by a lid-like closure part Plastic are sealed. Such

However, housings are expensive and relatively complex to assemble.

The object of the invention is therefore to provide a choke or a transformer of the initially mentioned to create the type mentioned, in the case of one consisting of several coils Winding a perfect insulation of the winding heads of the individual coils against each other is guaranteed without the production time of the Choke or the transformer would be increased, while at the same time a perfect insulation the winding heads is also guaranteed to the outside.

To solve this problem, the reactor or the transformer according to the invention is the Arrangement made such that with a winding consisting of at least two coils Molded insulating parts each at least one between the end windings of two adjacent ones Have coils protruding and isolating these from one another partition.

The partition wall of the molded insulating parts ensures that the molded insulating parts are pushed on at the same time a perfect insulation of the winding heads of the individual coils is made against each other. There is no need for separate inserts between the winding heads in the form of pressboard strips or the like,

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to be inserted, which would have to be done in the context of additional operations through which the Manufacturing time would be increased. Ensure the tongue and the outer wall of the insulating molded parts perfect insulation both against the core of the laminated core and to the outside to, with the remaining spaces between the outer wall and the laminated core through the Mounting rail or other parts connected to the laminated core that are already present, e.g. a sheet metal jacket, can be covered.

In one embodiment, the partition can be in the area between the tongue and the outer wall be arranged to run approximately parallel to the tongue, the associated with it both coils are plugged into one another. This results in a very space-saving and also Arrangement of the coils favorable in terms of production and insulation.

The molded insulating part can be in one piece, with the partition wall on one of the tongue with the outer wall connecting the upper wall part is formed. To also at the transition points to ensure perfect insulation of the winding heads to the straight side parts of the coil, it can be useful that the intermediate wall, the winding head of the inner coil with laterally encompassing two legs, with one is formed approximately U-shaped cross-sectional shape. In addition, the insulating material part can be designed like a knppcn with Seiton walls formed on the outer wall, which against

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the adjacent end wall of the laminated core are supported. As already mentioned, however, depending on the respective design of the laminated core, dispensing with on the outer wall of the Molded insulating material molded-on side walls between the outer wall and the adjacent one The end wall of the laminated core remains free, which are then firmly connected to the laminated core Parts are covered, so that the winding head is insulated laterally safe to touch.

In the case of a winding consisting of several coils, there are also larger coils corresponding to the number of coils Number of connecting wire ends of the coils present, which lead to connection devices accessible from the outside need to be guided. An insulation of these wire ends by means of attached insulating tubes or the like. is very laborious. Such a separate insulation of the wire ends can can be avoided in a simple manner if the respective molded insulating part is on its upper side having grooves or recesses running approximately at right angles to the outer wall, in the elongated metallic connection elements are used, while those with these connection elements connected wire ends of the coils through in the area of the top of the insulating molded part provided openings are performed. There can be one for each wire end of each coil own separate opening be provided. Is the molded insulating part with a cross-section U-shaped profiled partition provided, so

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can be adjacent, possibly open-edged each opening through one of the legs of the associated U-shaped profiled partition wall formed web be separated.

The above-described embodiments of the insulating molded parts are in the Usually in one piece. For certain chokes or transformers, however, multi-piece Isolation elements for the winding heads can be used with advantage. For example on the described insulating molded part made of insulating material that Isolierstofformteil be pushed at least partially encompassing the cover cap about the side cover of the winding heads causes. It is particularly useful to when the cap has connection devices for the wire ends of the coils and between at least one wall of the molded insulating part and an associated wall of the cover cap the connection devices leading isolated channels for the individual wire ends of the coils are trained. This means that the wire ends need after the molded insulating parts have been attached only to be inserted into the channels, whereupon the cover cap is attached, with which a perfect insulation of the connecting wires is guaranteed without any additional ones of their own Isolation measures would be required.

The channels can with advantage between the outer wall of the insulating molded part and a

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at a distance from the front wall of the cap and arranged by on the outer and / or webs formed on the front wall can be separated from one another. However, there are also embodiments conceivable in which the channels between associated and adjacent side walls the Isolierstofformteiles and the cap are provided.

For certain core shapes, it is advisable for the coils of the winding not to be inside one another but rather to be arranged one above the other. In this case, the arrangement can be made such that on each side of the laminated core has its own molded insulating material attached to each coil is and that the Isolierstofformteile of the individual coils on each side of the laminated core are interconnected to form the partition. This results in particularly simple ones Conditions when the molded insulating parts assigned to one another are plugged into one another and the partition wall through an upper transverse wall of the respectively inserted molded insulating material is formed.

Here, too, the assembly of the winding head insulation is particularly simple because only the individual Molded insulating parts successively on the winding heads of the coils lying one above the other be attached and then plugged into each other.

Each of the molded insulating parts can have its own tongue and thus the insulation of the

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assigned winding head take over against the core. In principle, however, execution forms mc; η conceivable where only for example the outermost molded insulating part has a tongue that holds all winding heads lying one on top of the other, of the coils isolated from the core.

To make assembly easier and to ensure perfect insulation of the winding heads It is advantageous if the interlocking molded insulating parts assigned to one another, the Shaped parts have guide parts that hold together in the correct position.

Finally, in this embodiment of the molded insulating parts, too, it is advantageous if channels for the individual wire ends of the coils are formed between adjacent wall parts of the molded insulating parts, which ducts are on the outside
lead at least one of the insulating molded parts arranged connection devices for the wire ends. The wire ends are connected to the terminal devices before the winding is applied to the core. The production can optionally be made easier by the fact that each molded insulating part has its own connection devices, which means that the individual coils of the winding are initially each connected. their own winding head insulation and can be connected with their wire ends to the associated connection devices. The so far prefabricated ton coils are then simply qosoüzt on top of each other, with the molded insulating parts

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their winding head insulation are plugged into one another in the manner already described. Then the whole thing is applied to the core of the sheet metal package. Additional developments of the throttle or the
Transformers are the subject of further subclaims.

In the drawing are exemplary embodiments of the subject of the invention shown. Show it:

1 shows a choke or a transformer according to the invention in a perspective view with a schematic illustration of the laminated core, partially cut open,

Fig. 2 shows the choke or the transformer according to FIG. 1, sectioned along the line II-II of the
Fig. 1 in a side view and in a partial representation,

3 shows a choke or a transformer according to the invention in a second embodiment, in a perspective view with the omission of the laminated core and below Illustration of one of the winding head insulation in the disassembled state,

A shows the choke or the transformer according to FIG. 3, sectioned along the line IV-IV of the
Fig. 3 in a side view and in a partial representation,

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Fief./S nine. Choke or a transformer according to '■ -. : '■■ the invention in a third embodiment, in a perspective partial representation with a schematic illustration of the laminated core

F'iq \ f cUe choke or the transformer according to Fig. 5, sectioned along the line VI-VI of FIG. 5 in a side view and in a Partial representation,

7 shows a choke or a transformer according to the invention in a fourth embodiment, sectioned along the line VII-VII of Fig. 9, in a side view and in detail,

FIG. 8 shows an end winding insulation of the choke or the transformer according to FIG. 7, in perspective Representation, and '

FIG. 9 shows the end winding insulation according to FIG. 8, in a plan view of its underside.

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In Figs. 1, 2 is a symmetrical series reactor shown, the winding of which consists of two separate coils 1, 2, which can be seen in FIG Way a .instantly rectangular shape au.fv'Piisen and the one in the two figures illustrated manner are arranged nested. The two coils 1, 2 are in the range their coil sides at 3, 4 individually each with a non-illustrated insulating film enveloped and by this groove insulation both against each other and against that indicated schematically at 5 Laminated core isolated.

The laminated core 5 is composed of individual sheet metal lamellas and consists of a T-shaped core 6 and a U-shaped jacket associated therewith 7. In principle, however, other sheet metal cuts, for example an E / I cut, are also conceivable.

On the end face protruding over the laminated core 5, nested winding heads 1a, 2a of the two Souls 1, 2 are each independent molded insulating material 8 on both sides of the laminated core 5 laterally placed, which are cap-like in the embodiment shown. Every molded part made of insulating material 8 has a tongue 9 and 9 inserted between the core 6 and the inner winding head 2a an outer wall 10 lying in front of the outer end winding 1a, the tongue 9 and the outer wall 10 through an upper wall 11 are connected to one another, to which two side walls 12 adjoin, which at 13 with a strip-like widening against the adjacent end wall of the laminated core 5 are supported.

The side walls 12 with the strip-like widenings 13 can also be omitted in a modified embodiment, which is also the case for the upper wall 11

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except for one connecting the tongue 9 to the outer wall 10 Steg applies. The tongue 9, the wall thickness of which is generally greater than that of the outer wall, can also be used 10, as shown, of solid design or in individual fingers next to each other. It is only essential that the tongue touches the winding head 2a in the distance from the end wall of the laminated core 5 holds.

In the embodiment shown in the figures, the winding heads 1a, 2a are laterally through the Side walls 12 and the top wall 11 covered. These walls can be shown in dashed lines in FIG Way down to be extended up to a mounting rail 14, which from the outer wall 10, the lower opening 15 delimited by the side walls 12 and the end face of the laminated core 5 closes. But there are also use cases where this lower opening 15 can remain open or where the side cover - with the elimination of the side walls 12 and optionally the top wall 11, for example is carried out by a sheet metal jacket connected to the laminated core 5.

The molded insulating material has in the area between its outer wall 10 and the tongue 9 one between the winding heads 1a, 2a of the adjacent one Coils 1, 2 protruding partition 16 which is formed on the upper wall 11 and approximately parallel to the Tongue 9 and the outer wall 10 runs. The partition wall 16 is the winding head 2a of the inner coil 2 with two legs 17 encompassing, formed with an approximately U-shaped cross-sectional shape, so that the winding head insulation up to the. The area of the straight coil sides 3, 4 is sufficient and flawlessly the existing slot insulation on the coil sides is connected.

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The molded insulating part 8 has on its upper side, in the area of the upper wall 11 at right angles to the outer wall 10 extending groove-like recesses 18, are inserted into the metallic connection tabs 19, each with a connection eyelet 20 for a wire end one of the two coils 1, 2 are provided. These wire ends, one of which is indicated at 21 in FIG is through openings provided in the area of the upper wall 11 of the molded insulating material part 8 22 out, the arrangement being made such that for each wire end 21 each of the two Coils 1, 2 each have their own separate opening 22 is provided. The open-edged openings 22 are in 1 in each case by one of the legs 17 of the U-shaped profile Partition 16 formed web separated from each other.

In the described embodiment (Fig. 1, 2) the winding head insulation explained is in one piece on both sides of the laminated core 5. at the embodiment according to FIGS. 3, 4 is on the insulating molded part 8 on both coil sides in each case a cover cap 24 made of insulating material pushed on, which is a substantially box-like Has a shape with a front wall 25, two side walls 26 and an upper top wall 27. At the side walls 26 are formed with guide strips 28 which engage behind the molded insulating part 8, as can be seen from FIG.

Between the outer wall 10 of the molded insulating material 8 and the adjacent front wall 27 of the cap 24, parallel channels 29 are formed which are separated from one another by webs 30 formed on the outer wall 10. Run in the channels 29

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the wire ends 21 of the two coils 1, 2, so that they are perfectly against each other when the cover cap 24 is pushed on and are insulated from the winding heads 1a, 2a. The channels 29 lead to the front wall 27 of the cap 26 provided connection devices 32 for the wire ends 21. The connection devices 32 each consist of molded onto the front wall 27, Tubes 33 slit at the bottom, to the slot of which an open-edged insertion slot 34 adjoins and can be placed on the metallic crimp sleeves, not shown, with which the in the Tube 33 inserted wire ends 21 crimped to produce a proper electrical connection can be.

In the further embodiment shown in FIGS the two coils 1, 2, their coil sides 3, 4 in turn with the conventional, off an enveloping insulating film existing groove insulation are provided, one on top of the other arranged so that their two winding heads are superimposed in the manner shown in FIG emerge from the face of the laminated core 5. The insulation of the winding heads 1a, 2a is designed in this case so that on each winding head 1a, 2a on each side of the laminated core 5 its own molded insulating material 8a, 8b is attached. Each molded insulating material 8a, 8b has its own tongue 9a, 9b and an outer wall 10a, 10b running parallel to it, which with the tongue 9a or 9b is connected by an upper wall 11a or 11b. In addition, are shown in the Embodiment on the outer wall 10a and 10b of the two molded insulating parts 8a, 8b side walls 12a, 12b, but embodiments are also conceivable in which these side walls 12a,

12b and / or part of the upper wall 11a or 11b is omitted. It would also be conceivable that only one of the molded insulating material parts 8a or 8b is formed in the aforementioned manner, or else the molded insulating material part 8b has no outer wall TOb.

The two molded insulating parts 8a, 8b are thereby connected to one another that they are plugged into one another in the manner shown in the figures, wherein the upper wall 11b of the inserted molded insulating material part 8b is the partition between the two Forms winding heads 1a, 2a.

The outer wall 10a of the outer insulating material forrateile 8a has a rectangular / open-edged recess 40 into which the outer wall 10b of the inner molded insulating part 8b is inserted with a raised part (FIG. 5), the connection devices 32 in the form of the slotted tubes 33 and the insertion slots 34 for the wire ends of the associated Has coil 2. Corresponding connection devices 32 for the connecting wire ends of the outer molded part made of insulating material 8a associated coil 1 are adjacent to the outer wall 10a of the molded insulating part 8a provided.

So that each insulating molded part 8a, 8b on the associated coil 2 or 1 are placed on their own, whereupon the pre-assembly of the coil by connection their wire ends at the associated connection devices 32 takes place. The coils pre-assembled in this way will be then superimposed in such a way that their insulating molded parts 8b are inserted into the molded insulating material 8a of the respective adjacent coil, the molded insulating material parts 8a, 8b in the correct position by means of guide parts indicated at 4 1 are held against each other so that the

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The whole forms a solid unit, which can then be applied to the core as a whole.

The embodiment shown in FIGS. 7 to 9 corresponds essentially to that according to the Fig. 5.6. Identical parts are therefore provided with the same reference numerals, so that in this respect no further explanation is required.

The inner molded insulating part 8b has a / tongue 9c, rectangular in cross section, which extends on both sides of the upper wall 11b and is designed in the form of a profile tube open on both sides, the cavity of which at 50 is indicated. The attached outer molded insulating material 8a has a shape a profile pin 51 provided guide element which is attached to its upper Wall 11a is formed at the rear and its external dimensions correspond to the internal dimensions of the tubular Tongue 9c correspond. In the assembled state, the profile pin 51 protrudes in the FIG visible way in the hollow tongue 9c, with which the two Isolierstofformteile 8a, 8b perfectly are led against each other. Here, the inner molded insulating part 8b - based on FIG. 7 in the vertical direction - slightly shorter than the interior of the outer molded insulating part it corresponds to 8a, so that it can be displaced to a limited extent in the outer molded insulating part 8a. Thus, through the length of the profile pin 51 engaging in the hollow tongue 9c, the Always get guidance between the two molded insulating parts 8a, 8b. This mobility of the inner Isolierstof molded parts 8b

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compared to the outer molded insulating material part 8a, it allows the same molded insulating material parts also the superimposed winding heads of different sized bobbins are perfect to isolate.

Between the outer wall 10a of the outer Isolierstof molded part 8a and the outer wall 10b of the inner Isolierstofformteiles 8b are - similar to the embodiment of FIG. 3 parallel Channels 29 are formed which are isolated from one another by webs 30 molded onto the outer wall 10b. In the canals 29 again run the connecting wires (not shown) for the wire ends of the two coils 1a, 2a to connecting devices 32 in the form of slotted Tubes 33, where insertion slots 34 (Fig. 8) for the wire ends of the coils 1a, 2a are assigned.

On the outer molded insulating part 8a there is also an insulating material Cover cap 24a pushed on, which exposes the small tubes 3 3 in the region of their front wall 27a leaves and a substantially L-shaped projection 53 that extends at right angles carries, which is designed in the manner of a channel. The nose 53 overlaps in the FIG as can be seen, a clamp element 54 arranged on the mounting rail 14, which is designed, for example, as a luster terminal and is fixed by it on the mounting rail 14. The cap 24a is on claws 55, from

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which cine is shown in Fig. 7, and in corresponding recesses on the upper Wall 11a of the outer molded insulating part 8a engage, latched with the outer molded insulating part 8a. This is between each other adjacent walls of the outer Isolierstof molded part 8a and the cover cap 24a a gap 55 is left free, which is formed with two in the profile pin 51 through cylindrical bores 56 in connection. These bores 56 and the Gap 55 allow the electrical leads 57 of an indicated at 58 and in the cavity 50 of the tongue 9c housed temperature-sensitive element 58 on all sides protected to the clamping element 54 or another suitable connecting device to lead outside. The temperature sensitive element 58 may be a micro fuse or a Be microswitches when a certain maximum winding temperature is exceeded speak to.

The cover cap 24a can also have additional spacing or guide devices, which cooperate with corresponding parts of the outer molded insulating part 8a, to ensure that the two parts are correctly positioned in relation to one another. For similar reasons, this is outer molded insulating part 8a in the region of its side walls with guide strips 28,

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similar to Fig. 3, formed, which has a channel-like guide for the side walls of the Form inserted inner molded insulating material 8b, as can be seen, for example, from FIG is.

The devices described can also be designed as small transformers. Also are Embodiments are conceivable in which more than two coils are present, with adjacent ones in each case Coils in the manner described through a partition in the area of the winding heads are isolated from each other.

The temperature-sensitive element 58 receiving In the embodiment according to FIG. 7, cavity 50 is laterally enclosed by the walls of the tubular tongue 9c. There are, as can be seen from Fig. 3, but embodiments are also conceivable in which this cavity 50 is channel-like, i.e. open on one side, so that in this cavity housed temperature-sensitive element 58 directly on the laminated core 5 is present.

Claims (3)

-I ".--- -; jvSua ι iu Patentanwälte Dipl.-Ing.W. Scherrmann Dr.-Ing.R. RO; 7300 Esslingen (Neckar). Webergasse 3. Postlach March 14, 1983 s.Vh. '. 'm, «,., *« PA 1 3 rÜal Tel ,, 07256610 sn TeHgrinmi Piltntschi Esslingtnnickir patent claims 1.; Choke or transformer, especially as a ballast for gas discharge lamps, with a core and a jacket consisting of Laminated laminated core, as well as with a stacked on the core and. Gegen this and the jacket insulated winding, on whose winding heads each independent insulating material Moldings are placed on the side, one in the space between the core and the each end winding have an inserted tongue and an outer wall in front of the end winding, being limited by the outer wall and the adjacent end wall of the laminated core Openings through connected to the laminated core, possibly completely or partially through a Mounting rail formed cover parts and / or covered by side walls of the insulating molded parts are, characterized in that one consists of at least two coils (1,2) Winding the molded insulating parts (8,8a, 8b) at least one protruding between the winding heads (1a, 2a) of two adjacent coils (1,2) and this separating wall (16) which insulates from one another. exhibit. 2. choke or transformer according to claim 1, characterized characterized in that the partition (16) in the area between the tongue (9) and the outer wall (8) is arranged approximately parallel to the tongue (9) extend and that are assigned to the two coils (1,2) plugged into each other. 3. choke or transformer according to claim 2, characterized in that the molded insulating part (8) is in one piece and the partition (16) on one of the tongue (9) with the outer wall (8) connecting upper wall part (11) is integrally formed. 4. choke or transformer according to claim 2 or 3, characterized in that the partition (16) the winding head (2a) of the inner coil (2) with two legs (17) on the side is formed encompassing with an approximately U-shaped cross-sectional shape. 5. choke or transformer according to claim 3, characterized in that the molded insulating part (8) designed like a cap with side walls (12) molded onto the outer wall (10) is, which are supported against the adjacent end wall of the laminated core (5). 6. choke or transformer according to one of claims 2 to 5, characterized in that the molded insulating part (8) on its upper side approximately at right angles to the outer wall (10) having extending grooves or recesses (18) into the elongated metallic connecting elements (19) are used and those with these connection elements (19) connected Wire ends (21) of the coils (1,2) through in the area of the top of the molded insulating part (8) provided openings (22) are guided. 7. choke or transformer according to claim 6, characterized in that for each end of the wire (21) each coil (1, 2) has its own separate opening (22). 8 .. choke or transformer according to claims 4 and 7, characterized in that adjacent, optionally open-edged openings (22) each through one of the legs (17) of the associated U-shaped profiled partition (16) formed web are separated. 9. choke or transformer according to one of claims 2 to 8, characterized in that on the insulating molded part (8) an insulating material, the insulating molded part (8) at least partially encompassing cover cap (24) is pushed. 10. choke or transformer according to claim 9, characterized in that the cover cap (24) has connection devices (32) for the wire ends (21) of the coils (1,2) and that between at least one wall of the molded insulating part (8) and an associated wall of the cap (24) to the connection devices (32) leading insulated channels (29) for the individual wire ends (21) of the coils (1,2) are trained. 11. choke or transformer according to claim 10, characterized in that the channels (29) between the outer wall (10) of the molded insulating part (8) and a spaced-apart front wall (27) of the cap (24) and arranged on the outer and / or Front wall molded webs (30) are separated from one another. 12. choke or transformer according to claim 1, characterized in that the coils (1,2) are arranged one above the other and on each side of the laminated core (5) of each coil (1,2) is assigned its own plugged-on molded insulating material (8a, 8b) and that the Molded insulating material (8a, 8b) of the individual coils (1,2) on each side of the laminated core (5) are interconnected to form the partition. 13. choke or transformer according to claim 12, characterized in that the one another associated molded insulating parts (8a, 8b) are inserted into one another and the partition through an upper transverse wall (11b) of the respective inserted molded insulating material (8b) is formed. 14. choke or transformer according to claim 13, characterized in that each of the. Molded insulating parts (8a, 8b) has its own tongue (9a, 9b). 15. choke or transformer according to claim 13 or 14, characterized in that the one inside the other plugged insulating molded parts (8a, 8b) each other associated guide parts (41) that hold the molded parts together in the correct position exhibit. 16. choke or transformer according to one of claims 13 to 15, characterized in that the inserted molded insulating part (8b) in the other molded insulating part (8a) is longitudinally displaceable to a limited extent is. 17. choke or transformer according to one of claims 13 to 16, characterized in that the inserted Molded insulating material (8b) has a tongue extending on both sides of the upper transverse wall (11b). 18. choke or transformer according to one of claims 13 to 17, characterized in that the tongue (9c) is hollow and on the outer insulating molded part (8a) a guide element (51) engaging in the cavity (50) of the tongue (9c) is arranged. 19. choke or transformer according to one of claims 13 to 19, characterized in that on the outer molded insulating part (8a) a molded insulating material part (8a) at least partially encompassing cover cap (24a) is attached, which acts as a cover for electrical connecting wires (57) is formed. 20. Choke or transformer according to .Ansprüche 9 or 19, characterized in that the cover cap (24, 24a) has a protruding cover nose (53) for electrical connection wires (57) on its front side. 21. choke or transformer according to claim 20, characterized in that the cover nose (53) is designed as an approximately L-shaped channel. 22. choke or transformer according to claim 9 or 19, characterized in that the Cover cap (24, 24a) and the adjacent molded insulating part (8, 8a) with one another are locked. 23. Choke or transformer after one of the The preceding claims, characterized in that the tongue (9, 9a, 9b, 9c) has an optionally channel-like cavity (50) in which a temperature-sensitive element (58) is arranged.