ES2303268T3 - CASE. - Google Patents

Abstract

The invention relates to a housing (20) for a magnet assembly (1), e.g. for housing a preferably annular magnetic core (2) of a differential current converter in a residual-current circuit breaker. According to the invention, the housing (20) consists of several parts and is configured from an insulation material. At least two conductive contacts (5) for connecting the ends (6) of at least one conductor loop (3), such as e.g. a secondary winding and/or a tertiary winding (4) of the differential current converter are configured on the housing. To improve the automated production of residual-current circuit breakers, the conductive contacts are configured as connecting conductors (8) of at least one electronic component.

Description

Case.

The invention relates to a transformer of differential current for a fault current switch, comprising a magnetic core, preferably toroidal, at minus a conductive loop, such as a secondary coil and / or tertiary coil, and a multi-piece housing manufactured in isolating material.

Magnetic devices are part of the differential current transformers as used in default power switches. Here the magnetic core or its housing are wrapped by a primary coils, attached, in its application to a fault current switch, to terminals of connection and contacts of a combiner. Secondary coil and / or tertiary coil disposed on the magnetic core or on its housing is attached to components or electronic modules located Inside the switch According to the usual construction forms of the fault current switches of this type, the union with the default power switch modules takes place by means of the cables used for the coils themselves, so general relatively thin and ductile, because in this way it they can apply a large number of windings without magnetically loading said core. For other part, when using thin wires can be kept at a level under the mass, dimensions and costs of a switch fault current

In such an embodiment of the union between the secondary coil and / or the tertiary coil and the modules a fault current switch, the fact that, due to the small diameter and the high ductility of the wires used, said union causes problems in the case of automated manufacturing The ends of the thin wires of This type does not constitute, for an automatic production machine, a defined position due to its insufficient formal stability. A deviation, although scarce, from the actual position of the end of a wire with respect to the previously programmed position prevents that the automatic production machine finds the end of the wire, which makes a secondary coil joint and / or impossible of the tertiary coil with the modules of a switch fault current Therefore, the secondary coil connection and / or of the tertiary coil with the modules takes place manually to the greatest extent possible. This results in high costs and high failure rates.

From patent EP 650 172 A a known magnetic core casing device with a two casing parts according to the preamble of claim 1, wherein they are provided, in the housing in two parts, holes for the primary drivers The different housing covers they have plug connections, made as through holes gaps in which the primary conductors are introduced. Of this mode, and by effect of the screen elements arranged in the front sides of the housing, insulation can be guaranteed among the primary drivers, without themselves having to be isolated

US Patent 2,290,680 A describes a coil toroidal for telephone applications, in which it is planned, for a toroidal magnetic core, a housing formed by halves of covers made of insulating material. This case carries pivots with connecting contacts for wire ends coil wrapped around this housing.

On the other hand, patent AT 395 492 B describes an electric coil for filter applications and for mounting of printed circuit boards, consisting of a coil body with winding, where at the base of the coil core are interlocking the connection cables of an electrical component, connected in turn to the winding connection cables.

The object of the invention is therefore a housing for magnetic devices, for example for differential current transformers for circuit breakers fault current of the type mentioned at the beginning, with which can avoid the mentioned disadvantages, and that allows an improvement of the automatic manufacturing of current switches default.

According to the invention this is achieved from so that at least two contacts are configured in the housing conductors, in which the ends of the loop are connected conductor, and so that the conductor contacts are configured as connection conductors of at least one component electronic.

In this way the automatic machine of manufacturing has defined endpoints, which can be reached by said machine with the correct accuracy. So you can achieve a high degree of manufacturing automation default power switches, which in turn allows reduce manufacturing costs and scrap rates. With the use of a component contacted in any case by the secondary coil and / or by the tertiary coil can be dispensed with special contacts, thereby manufacturing costs and Manufacturing time can be further reduced.

In the development of the invention it can be provided at least one clamp for the electronic component, at least one, preferably on at least one outer surface of the housing. In this way you can place the component, at least one, directly in the magnetic core housing, and therefore the most possible close to the secondary coil wires and / or the tertiary coil that is about contact, so the wires starting from the coil have a minimum length.

In this context it can be foreseen, as development of the invention, that the fastener, at least one, be configured in the housing forming a single piece. This allows a Simple and economical manufacturing of the housing and the clamping.

According to another embodiment of the invention it can be provided that the fastener includes at least two fasteners partials arranged on different covers of the housing. With two partial fasteners can be defined more accurately the component position, at least one.

In turn, according to another embodiment of the invention, it can be provided that the fasteners have at least one auxiliary driving element, preferably a bevel. Of this mode you can enter the component, at least one, more Simple in fastening. This is also an advantage if They use automatic manufacturing machines.

A variant of the invention may consist of that the clamp is intended for electronic components preferably wired axially or radially, as per example resistors, capacitors or diodes. Especially those capacitors and diodes are common as placed components in contiguity with the secondary coil and / or the tertiary coil in default current switches, for example, for circuits rectifiers and energy accumulators.

In a subsequent configuration of the invention it can be provided that the fastener is designed for several electronic components, preferably two, attached to a junction of components. In this way the components used in a interconnection of circuits with the same connection points are can also be arranged together, whereby the components Functional do not separate. This advantageously affects the length of the signal paths, and therefore on the vulnerability to disturbances.

In the development of the invention it can be provided that the connection leads of the component union are united at its ends. In this way it is easily configured a union of both mechanical and conductive components electrically

Another possible embodiment may consist of providing at least one screen element, preferably in the form of a plate, and in particular configured in One piece This allows the shielding of the coil secondary and / or tertiary coil and components electronic conductors of the primary coil. For other part of the screen element, at least one, can serve as a stop or as a defined end for the secondary coil and / or the coil tertiary and for an electronic component.

According to another configuration of the invention, it can provide that the clamp remains immobilized in conductors of connection of the electronic component, at least one, and / or of the union of components. In this way they can be introduced into fasteners identical eventual components with external dimensions different. On the other hand, with two partial fasteners arranged each in a constructively equal housing cover this Simplifies the design of the support. Since the position of the connecting conductors is decisive for subsequent contact of the components, their position can be established from this mode with great accuracy.

In this context it can be foreseen, as development of the invention, that the clamp be an extension in Tooth shape with a seat. A fastener designed in this way It has high stability.

As a development of the invention, it can be provided that the restraint includes at least one stop device, in particular a ratchet hook. In this way the component, when minus one, it can be immobilized simply and tightly.

According to another embodiment of the invention it can be provided that the electronic component, at least one, wired axially or radially, be placed basically in parallel to the outer surface of the housing, made basically as a cylinder liner. Thus the extremes of the connecting conductors are as close as possible to the ends of the secondary coil and / or the tertiary coil, and They can thus be contacted by a short route.

A variant of the invention may consist of that the connecting conductors form a tightening zone that Cooperate with restraint. In this way the components can be dispose of the device in a simple and safe way magnetic.

In the subsequent configuration of the invention, you can expect that at least one of the partial fasteners present a U-shaped base body, comprising the branches and a crossbar that joins them. In this way a fastener of a simple and stable design.

According to a new configuration of the invention, you can expect the U-shaped base body branches to be formed by the screen-shaped screen elements. Of this mode already existing components or modules have a use multiple, thereby reducing the overall manufacturing expense of the housing and / or fastening.

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According to another embodiment of the invention it can be provided that, in parallel with at least one branch, on the outer side of the U-shaped base body an element of tightening and / or driving, preferably plate-shaped and in particular manufactured in a single piece with the housing, where the branch and the clamping and / or driving element form a zone of tightening and / or driving to hold and / or drive the connecting conductors of at least one electronic component. From this way the position of the connecting conductors of at least one Electronic component can be determined accurately. In addition to this mode can be interlocked the electronic component, at least one, if necessary in their connecting conductors.

Also according to another embodiment of the invention, it can be provided that the cross member of the base body in U shape is configured as a flat plate, manufactured preferably in a single piece with the housing. The crossbar in plate shape forms a secure stop for the electronic component, at least one.

A variant of the invention may consist of that the crossbar is arranged parallel to the cover surface and / or to the outer edge of the cylinder liner. This way you can ensure that the electronic component, at least one, is placed parallel to the cover surface and / or the outer edge of the cylinder shirt. This simplifies the machine settings Automatic component assembly.

In another configuration of the invention it is possible to provide that the crossbars of two partial fasteners, which together they form a support, are in parallel with each other and / or With a seating area. In this way they can be accommodated Secure parallel housings of most components electronic

In the development of the invention it can be provided that the seating area is provided for the accommodation of at least an electronic component, preferably of a junction of components. In this way a housing can be arranged electronic component or a union of components.

Another possible embodiment may consist of the component connection conductors electronic, at least one, wired axially or radially, is place parallel to the outer surface of the housing, basically done as a cylinder liner. In this way the ends of the connecting conductors are contiguous with the ends of the secondary coil and / or the tertiary coil, and so they can be contacted by a short route.

A variant of the invention may consist of place an electronic component on the fastener, at least one, preferably a union of components, for which it is placed by above the clamp a secondary coil and / or a tertiary coil of the differential current transformer. This way you can secure the electronic component, at least one, easily in position by means of a device provided in any case in the magnetic device, specifically by means of the coil secondary and / or tertiary coil.

The invention is described in greater detail. referring to the attached drawings, in which they represent especially preferred embodiments. In them It can be seen:

Figure 1 a first embodiment of a housing according to the invention in exploded view;

Figure 2 a housing according to Figure 1 in horizontal projection;

Figure 3 a housing according to figure 1 in elevation side;

Figure 4 a housing according to Figure 1 in axonometric representation;

Figure 5 another axonometric representation of a housing according to figure 1;

Figure 6 a second embodiment of a housing according to the invention in exploded view;

Figure 7 a housing according to Figure 6 in axonometric representation;

Figure 8 another axonometric representation of a housing according to figure 6; Y

Figure 9 another axonometric representation of a housing according to figure 6.

Figures 1 to 9 show different views of Especially preferred embodiments of a housing 20 for a magnetic device 1, for example for housing a magnetic core 2, preferably toroidal, of a transformer differential current of a fault current switch, where the housing 20 is made of several pieces and material insulation, and at least two contacts are configured in the housing conductors 5 for connecting the ends 6 of at least one conductor loop 3, such as a secondary coil and / or a tertiary coil 4 of the differential current transformer, and where the conductive contacts 5 are configured as connection conductors 8 of at least one electronic component 9.

Magnetic devices 1 are used in current transformers of electrical switching devices, especially in fault current switches. Include a magnetic core 2, constituted, in the embodiments preferred, by a 2 toroidal magnetic core with section rectangular cross. The magnetic core 2 is wrapped, during mounting the current transformer in a switch fault current, with primary coils, connected to the terminals of input or output and contacts of a combiner. The reels primary envelop the cross section of the magnetic core 2, typically only between once and once and a half. The number of primary coils corresponds to the number of conductors of the network to be protected, usually two or four.

To the extent that the output current is not corresponds to the input current a voltage is induced by the difference existing in the secondary coil 4, and the switch of Default current trips. A tertiary coil that in your case available is used for surge recognition brief transients, caused for example by lightning, and prevents, before the appearance of the transient brief surges of this type, the trip by mistake of the power switch of default.

The secondary coil and / or the tertiary coil 4 it can be placed both directly on the magnetic core 2, in in which case at least one hole should be provided in the housing for the exit of the wires 7, or, as represented in the Figures 2 to 5, and 7 to 9, on the housing 20. It can also be provided one of the conductive loops 3, or one of the coils, in the core magnetic 2 and one in the housing 20.

The magnetic core 2 is provided, especially for protection against mechanical load, of a housing 20 made of an insulating material, preferably plastic.

The magnetic core 2, or the cross section of the magnetic core 2, is wrapped or rolled by a loop conductor 3, preferably a secondary coil and / or a coil tertiary 4. Said coil may be placed directly on the magnetic core 2 or on the housing 20. Since the coil secondary and / or tertiary coil 4 are usually manufactured from an extremely thin wire 7, and consequently flexible, the ends 6 of the coils or of the conductor loop 7 They pose a problem for automatic manufacturing machines, because some wires 7, so thin and not very rigid, that separate from a coil, are difficult to grasp or contact for automatic manufacturing machines. Therefore, it is planned to unite the ends 6 of the secondary coil and / or of the tertiary coil 4, directly in the area of the housing 20, to the contacts 5 conductors, which are built rigid and solid and have a defined length, so that these constitute endpoints defined that can be contacted, as planned, by a Automatic manufacturing machine, and do not deform excessively when the automatic machine accesses them.

It is planned that the conductive contacts 5 are manufactured as connecting leads 8 of a component electronic 9, at least one, thereby connecting the conductors 8 comply, in component 9 available in any case in the default power switch, in addition to your tasks functional, its additional objective of serving as contact for ends 6 of the secondary coil and / or the tertiary coil 4.

The housing 20 of the embodiments preferred of a magnetic device according to the invention is divided into two, with an equal construction of both decks of casing 21. However, all other designs can be used of a housing 20 for a magnetic device 1. With the same design of the two covers 21 of the housing these can be manufacture with a single tool, which allows reducing housing manufacturing costs 20.

Each cover 21 of the housing of the shapes of preferred embodiment has an outer jacket surface of the cylinder 22 and an inner sleeve surface of the cylinder 23, as well as a cover surface, bringing the outer surface of cylinder liner 22 and the inner surface of liner cylinder 23 are limited on one side by the cover surface 24, and on the other side they form an outer edge of the cylinder liner 25 and an inner edge of the cylinder sleeve 26. The three surfaces form an interior space 27, intended for the magnetic core housing 2. On the outer side 28 of the outer surface of cylinder sleeve 22 facing the interior space 27 there is at least one fastener 29 or fastener partial 30, at least one screen element 31 and at least one connecting element 32, all preferably manufactured in a single piece

The connecting elements 32 are made preferably as diametrically opposed connecting elements 32. Any number of joining elements 32 can be provided. preferred embodiment two elements of joining first 33 and two joining elements second 34 opposite diametrically to the first joining elements 33, and placed in the outer side 28 of the outer surface of the cylinder liner 22 such that, when two decks are pressed against each other of housing 21 equal in the position shown in figure 1 and in figure 6, that is, in one position relative to the other that it gathers the interior spaces 27 of the two decks 21 of the housing forming a common interior space, the connecting elements first 33 interact with the joining elements second 34 retaining these. So, in the embodiments preferred it is provided that the first joining elements 33 include projections 35 in the form of pivots, that the elements of junction seconds 34 have housing holes 36 diametrically opposed, although slightly thinner, and that first joining elements 33 and the second joining elements 34 be placed in contiguity with the outer edge of the shirt of the cylinder 25. Other connecting elements 32 can be provided, for example a bayonet closure.

In the preferred embodiments of the housing 20 is provided that said housing includes elements of screen 31, preferably two, preferably constructed in plate shape. The screen elements 31 are arranged in both covers 21 of the housing such that in the housing 20 already mounted form a continuous screen element. The elements of screen 31, preferably two, also serve as a stop for a conductor loop disposed on the housing 20, such as a coil secondary and / or a tertiary coil 4.

In the housing 20, preferably in at least one of the outer surfaces 45 of the housing is arranged at less a fastener 29 for the electronic component 9, at least one. In preferred embodiments, the fastener 29 is formed by two partial fasteners 30, each fastener being placed partial 30 in a cover 21 of the housing.

In preferred embodiments the clamping 29 is intended for electronic components 10 wired axially or radially, such as resistors, capacitors or diodes 16. Especially capacitors and diodes 16, as components 9, 10 closest to the secondary coil and / or to the Tertiary coil 4, are common in current switches defect, for example for rectifier circuits and accumulators of Energy. The diodes 16 also contact, in a parallel arrangement counterpolar as depicted in figures 2 to 5 and 7 to 9, preferably with tertiary coil 4, intended for detection of short transient processes.

The following is described in greater detail, according to figures 1 to 5, a first embodiment of a housing 20 according to the invention.

The fastener 29, or the partial fasteners 30, it is placed, in a first preferred embodiment, of such so that the electronic component 10, at least one, wired in axial or radial direction, it is located parallel to the surface of outer shell 45, basically constructed as a cylinder liner 22

Partial fasteners 30 are configured preferably as an extension 37 in the form of a tooth, with a seat 38. The tooth-shaped extension 37 has a basically rectangular cross section, protrudes from the outer jacket surface of cylinder 22 perpendicular to the same, and its specific position depends on the external dimensions of the electronic components 9, 10 to be housed. In the first preferred embodiment the partial fasteners 30 they are arranged, as can be seen in figures 1 to 5, such that they have a distance from the outer edge 25 of the cylinder liner surface, distance that is at least greater than half the length of the component housing electronic 9, 10 to be housed.

Partial fasteners 30 have bevels 39, which facilitate the accommodation of electronic components 9, 10 in the fasteners 29. In the first embodiment the 30 tooth-shaped partial fasteners feature two bevels 39, which in turn have a common edge 40. One of the two beveled 39 is continued in a detention device 41, in particular a ratchet hook 42. Here you can provide any another stopping device 41 in addition to the ratchet hook 42 and / or instead of it.

The stop device 41 may serve to immobilize both the housing of an electronic component 9, 10 and the connection conductors 8 of an electronic component 9, 10, as in the first preferred embodiment.

In the first preferred embodiment the clamping 29 is provided for the accommodation of several components electronics 9, 10, preferably two, attached to a junction of components 11. Preferably two electronic components 9, 10 are conductively linked to each other at the ends 12 of their connection conductors 8, preferably by direct welding or indirect, for which the connecting conductors 8 form a tightening zone 15 that collaborates with clamping 29. Said zone may be formed, as in the first embodiment preferred, represented in figures 1 to 5, by two conductors of connection 8, where connection conductors 8 have a double bending 13. However, the tightening zone 15 may be also configured as a tightening zone 15 in narrowing, if for example, the connection conductors 8 do not have double bend 13.

The clamp 29, or the double clamp 30, is available here within the tightening zone 15, and the device stop 41 ensures the union of components 11 against the position changes The retention force is generated by the spring effect of the connecting conductors 8 of the electronic components 9, 10 attached to the union of components 11. Therefore the fastener 29, or the partial fasteners 30, presents in the seating area 38 its narrowest width 44, greater than the distance 14 between two connecting conductors 8 that together they form a tightening zone 15. In this way it is possible to ensure a secure fixation of the component joint 11.

To the extent that, for an application, no electronic components 9, 10 are connected directly to a secondary coil or a tertiary coil 4, it they can also incorporate 29 wires properly flexed or zero ohm jumpers and, if a connection is not desired by the way, the corresponding plastic parts with contacts final conductors

The following describes in greater detail a second preferred embodiment of a housing according to the invention 20 according to figures 6 to 9.

The basic structure of the housing 20 is identical to the first preferred embodiment, above described, of a housing 20 according to the invention. The first and the second preferred embodiment of the housing 20 is distinguish only in relation to the design of the fastener 29, or of partial fasteners 30, and in relation to the arrangement preferred of the component connecting conductors 8 electronic 9, at least one, or the union of components 11.

In the second preferred embodiment described the partial fasteners 30, at least one, have a U-shaped base body 50, which includes branches 51 and a crossbar 52 linking said branches. It is preferably provided that the partial fastener 30 is manufactured in an insulating material and is configure in one piece with housing 20.

The branches 51 of the U-shaped base body 50 they are preferably formed by the screen elements 31 in plate shape, which here does not run to the outer surface of cylinder liner 22, but only to crossbar 52 of the U-shaped base body 50. Screen elements 31 in plate form run preferably here parallel to the outer surface 45 of the housing, designed basically as cylinder liner 22. Branches 51 preferably extend leaving the outer surface 45 of the housing at least until they protrude from the electronic component 9, at least one.

The two branches 51 of the shaped base body 50 of U are preferably joined by a crossbar 52, designed as flat plate It is also possible to provide, instead of the crossbar 52, a number of pivot-shaped projections. The crossbar 52 is arranged preferably parallel to the cover surface 24 and / or the edge outside of the sleeve of the cylinder 25, keeping parallel between yes, in the preferred embodiment of the housing 20, the surfaces of cover 24 and the outer edge of the cylinder sleeve 25.

The cross member 52 preferably protrudes from the outer surface 45 of the housing such that it protrudes from the electronic component 9, at least one, with which the cross member 52, as can be seen in figures 6 to 9, it protrudes from the arms 51. It can be provided that the crossbar 52 and the arms 51 are not build forming a constructive unity, but each one by separated.

It can be provided, parallel to at least one arm 51, on the outer side of the U-shaped base body 50, preferably in the form of a plate and in particular manufactured in a single piece with housing 20, placing an element of tightening and / or driving 53, whereby the branch 51 and the element of tightening and / or driving 53 form a tightening zone and / or conduction 54 for interlocking and / or conduction of connecting conductors 8 of an electronic component 9, at least one.

In the especially preferred embodiment, the second preferred embodiment of a housing 20 according to The invention presents, in parallel with each branch 51, an element of tightening and / or driving 53 of this type. In this way a way of embodiment of this type presents, as seen in figures 6 to 9, a tightening and / or driving zone 54 on both sides of the branches 51 of the U-shaped base body 50.

Preferably a fastener 30 of the second preferred embodiment of a housing 20 according to the invention is formed by two partial fasteners 30, arranged in different housing covers 21. The crossbars 52 of the two partial fasteners 30 are preferably arranged here in parallel with each other, and form a seating area 55, provided for housing at least one electronic component 9 or a joint of components 11. As already stated , in the case of the electronic components 9 preferably provided for placement in the fastener 29 of a housing 20 according to the invention, these are diodes and capacitors, although any other type of known electronic components 9 can be provided. It is a known fact that electronic components 9, with identical electrical characteristics, may be available in the most varied forms of construction. Figures 6 to 9 exemplify the placement of a joint 11 of components 10 wired axially in a second preferred embodiment of a housing 20 according to the invention. However, it is possible to provide for the placement in the fastening of other wired components 9, for example radially wired components or components with lenticular shaped housings. Corresponding to the shape of the housing of the electrical components 9 that is intended to be housed, the proper adaptation of the design of the seating area 55 can be provided. Thus, for example, with the planned placement of components 9 with lenticular shaped housings, it can dispense with the crossbar 52, whereby the components 9 would be stopped at the ends of the
arms 51.

It can be provided that the connecting conductors 8 of the electronic component 10, at least one, wired in the direction axial or radial, basically placed parallel to the surface outer shell 45, basically constructed as a shirt cylinder 22. The connection conductors 8 are arranged preferably so that they are also substantially in parallel with each other. In the embodiment especially preferred placement of the ends 12 of the assembly of the connecting conductors 8 in contiguity with a surface of cover 24.

It can be expected that electronic components 9 arranged in the clamp 29 are fixed by tightening the connecting conductors 8 in the tightening and / or driving zone 54. However, it can also be provided that the tightening zone and / or of conduction 54 is only for the conduction of connecting conductors 8. Regardless of this, it is anticipated preferably the placement of a secondary coil and / or a tertiary coil 4 of the differential current transformer by above the components 8 arranged in the clamp 29, or by above the union of components 11. The secondary coil and / or tertiary coil 4 thus ensures components 9 or the union of components 11 against detachment of the fastener 29. On the other hand, this ensures the shortest possible union of the secondary coil and / or of the tertiary coil 4 with the ends 12 of the connecting conductors 8.

The combination of some or of all the features of the preferred embodiments, first and second, of a housing 20 according to the invention.

Any combination of All published features. You can also provide the omission of any of the published features.

Claims (23)

1. Differential current transformer for a fault current switch, comprising a magnetic core (2), preferably toroidal, at least one conductive loop (3), such as a secondary coil and / or tertiary coil (4), and a multi-piece housing (20) made of insulating material, characterized in that at least two conductive contacts (5) are configured in the housing (20), in which the ends (6) of the conductive loop (3) are connected, and because the conductive contacts (5) are configured as connection conductors (8) of at least one electronic component (9). 2. Differential current transformer according to claim 1, characterized in that at least one clamp (29) is provided for at least one electronic component (9), preferably on at least one outer surface (45) of the housing. 3. Differential current transformer according to claim 2, characterized in that the fastener (29), at least one, is manufactured in a single piece with the housing (20). 4. Differential current transformer according to one of claims 1 to 3, wherein the housing (20) includes two covers (21) of the housing, preferably of equal construction, characterized in that the fastener (29) includes at least two partial fasteners ( 30) arranged in covers (21) different from the housing. 5. Differential current transformer according to one of claims 2 to 4, characterized in that the fasteners (29) have at least one auxiliary conductive element (46), preferably a bevel (39). 6. Differential current transformer according to one of claims 2 to 5, characterized in that the clamp (29) is provided for electronic components (10) preferably wired axially or radially, such as resistors, capacitors or diodes (16). 7. Differential current transformer according to one of claims 2 to 6, characterized in that the clamp (29) is provided for several electronic components (9), preferably two, connected to a union of components (11). 8. Differential current transformer according to claim 7, characterized in that the connecting conductors (8) of the component union (11) are connected at their ends (12). 9. Differential current transformer according to one of claims 1 to 8, characterized in that at least one screen element (31) is provided, preferably in the form of a plate, and in particular configured in a single piece. 10. Differential current transformer according to one of claims 2 to 9, characterized in that the clamp (29) is immobilized in connecting conductors (8) of the electronic component (9), at least one, and / or of the connection of components (11). 11. Differential current transformer according to one of claims 2 to 10, characterized in that the clamp (29) is a tooth-shaped extension (37) with a seat (38). 12. Differential current transformer according to one of claims 2 to 11, characterized in that the fastener (29) includes at least one stop device (41), in particular a ratchet hook (42). 13. Differential current transformer according to one of claims 6 to 12, characterized in that the electronic component (10), at least one, wired axially or radially, is basically placed parallel to the outer surface (45) of the housing , basically made as a cylinder liner (22). 14. Differential current transformer according to one of claims 8 to 13, characterized in that the connecting conductors (8) form a tightening zone (15) that cooperates with the fastener (29). 15. Differential current transformer according to one of claims 2 to 9, characterized in that at least one of the partial fasteners (30) has a U-shaped base body (50), comprising the branches (51) and a crossbar ( 52) that unites them. 16. Differential current transformer according to claim 15, characterized in that the branches (51) of the U-shaped base body (50) are formed by the plate-shaped display elements (31). 17. Differential current transformer according to claim 16, characterized in that, in parallel with at least one branch (51), a clamping element and / / is provided on the outer side of the U-shaped base body (50). or driving (53), preferably in the form of a plate and in particular manufactured in a single piece with the housing, where the branch (51) and the clamping and / or driving element (53) form a tightening zone and / or conduction (54) to hold and / or drive the connecting conductors (8) of at least one electronic component (9). 18. Differential current transformer according to one of claims 15 to 17, characterized in that the cross member (52) of the U-shaped base body (50) is configured as a flat plate, preferably manufactured in a single piece with the housing ( twenty). 19. Differential current transformer according to one of claims 15 to 18, wherein the housing covers have cover surfaces (24) and outer edges of the cylinder liner (25), characterized in that the cross member (52) is arranged in parallel to the cover surface (24) and / or the outer edge of the cylinder sleeve (25). 20. Differential current transformer according to one of claims 15 to 19, characterized in that the crossbars (52) of two partial fasteners (30), which together form a fastener (29), are parallel to each other and / or with an area seating (55). 21. Differential current transformer according to claim 20, characterized in that the seating area (55) is provided for the housing of at least one electronic component (9), preferably of a union of components (11). 22. Differential current transformer according to one of claims 15 to 21, characterized in that the connecting conductors (8) of the electronic component (10), at least one, wired axially or radially, are basically placed parallel to the surface outside of the housing (45), basically made as a cylinder liner (22). 23. Differential current transformer according to one of claims 15 to 22, characterized in that in the clamp (29) an electronic component (9) is placed, at least one, preferably a union of components (11), for which it is placed above the clamp (29) a secondary coil and / or a tertiary coil (4) of the differential current transformer.