EP2037478A2 - Spool carrier and yoke of an electromagnetic actuator of a protective switching device, electromagnetic actuator and protective switching device - Google Patents

Abstract

The carrier (1) has a hollow cylindrical body (5) provided between a pair of end plates (11, 12) for accommodation of a coil. A set of projections (13) is provided respectively at front sides of the two end plates axially parallel to a longitudinal axis of the hollow cylindrical body of the coil carrier for fastening at a yoke (2). The projections are designed as cylindrical pins or as snatching noses. The projections are arranged coaxial to each other, and are arranged at side edges of the end plates. The carrier is made of plastic.

Description

The present invention relates to a coil carrier of an electromagnetic release of a protective switching device, comprising a first and a second end plate and a hollow cylindrical body provided between the end plates for receiving a coil. Furthermore, the invention relates to a yoke of an electromagnetic release of a protective switching device, comprising a U-shaped profile with a base member and two arranged on the base member legs and a respective recess in each leg for the passage of a plunger. Furthermore, the invention relates to an electromagnetic release of a protective switching device with a coil carrier and a yoke and a protective switching device.

Protection switching devices enable safe handling of electrical energy. In particular, the increased use of residual current (RCD) circuit breakers and circuit breakers, so-called circuit breakers, has contributed to increasing safety. Due to their compact design and high functionality, combined RCCBs offer new possibilities for a modern and comfortable electrical installation.

The electromagnetic actuator consists of a wound on a bobbin coil which accelerates a ram in its interior along the coil axis upon application of a voltage. The plunger causes an impulse on a switching mechanism. When removing the voltage of the plunger is through a spring pushed back to its original position. A yoke closes the magnetic circuit, thereby significantly increasing the power of the trigger.

Electromagnetic actuators are known in which the coil carrier is inserted into the yoke and held by a core which is caulked or welded to the yoke. The core also carries the plunger and the compression spring. At the side without core, the plunger is guided by the bobbin.

From the DE 197 21 591 A1 An electromagnetic short-circuit current release is known in which a ferromagnetic yoke surrounds a coil. The yoke carries on its underside an inside of a hollow cylindrical sleeve, which is wrapped by multilayer windings, guided core of ferromagnetic material. The yoke has on its top and on its underside each one arranged on the sleeve axis opening. Through the upper opening in the sleeve, also referred to as a coil carrier, slidably mounted anchor made of ferromagnetic material. At the anchor is held on the sleeve axis and guided by the lower opening of the yoke led pin made of insulating material. Anchor and pin form an impact armature guided against the moving contact when the short-circuit current release is triggered.

In an incomplete yoke, which has only two sides instead of three sides, it is possible to push the coil carrier in the axial direction on the core or, if no core is present, to stick in the yoke. The plunger is mounted on one side in the yoke and on the other side in the coil carrier.

In Fig. 1 an electromagnetic release is shown in which the bobbin 1 is inserted into an opening of the yoke 2. The plunger 3 is held supported on one side by the coil carrier 1 and on the other side by the yoke 2. To the hollow cylindrical body 5 of the bobbin 1, a coil 7 is wound. The plunger 3 has a compression spring 6 to push back the plunger 3 after removal of the voltage back to its original position. The bobbin 1 is inserted from the left into the yoke 2 during assembly to the yoke 2. The plunger 3 is then stored on the left in the coil carrier 1 and on the right in the yoke 2.

In the Fig. 2 is another known electromagnetic release is shown. The bobbin 1 is secured by the core 4 from slipping. The plunger 3 is mounted in the core 4 and in the coil carrier 1. The core 4 must be caulked outside before installing the plunger 3, so he does not fall out of the yoke 2. To the hollow cylindrical body 5 of the bobbin 1, a coil 7 is wound.

From the JP 2257604 A2 are a coil or a bobbin known, which engage by means directed towards the longitudinal axis of the bobbin projections in the groove of the yoke to fix the bobbin to the yoke. That is, the projections are arranged on the inside of a slotted guide on the bobbin and engage in grooves which are provided on the sides of the legs of the yoke, a. This type of attachment of the bobbin to the yoke has several disadvantages. Firstly, an additional spacer element between an end plate of the bobbin and a leg of the yoke must be inserted, otherwise a game between these two elements in the thickness of the projection, which is provided on the other end plate of the bobbin, would be present. On the other hand is disadvantageous that on one side of the bobbin only held by the plunger to the yoke. That is, the coil carrier touches with its inside the plunger, which leads to undesirable friction losses. Without the spacer, the projections or the slide guide would have to be resilient, which would lead to large tolerances or relative movements between the bobbin and the yoke.

A disadvantage of such known electromagnetic triggers is the complicated structure or complicated assembly of the elements of the electromagnetic release. The use of a core or a spacer means additional costs and increased installation costs. The plungers also partially contact the spool carrier in the prior art electromagnetic triggers, thereby resulting in friction loss.

The object of the invention is to provide a bobbin, which can be easily and safely fixed in a yoke without further additional elements, such as a core or a spacer element. Furthermore, a yoke, which allows a simple and secure attachment of such a bobbin, as well as an electromagnetic release or a protective switching device to be created, which / which can be constructed easily and safely from a few elements. In particular, the assembly of the bobbin to the yoke to be made possible without technical aids.

This object is achieved by a coil carrier having the features according to independent claim 1, by a yoke having the features according to independent claim 6, by an electromagnetic release with the features of the independent claim 9 and by a protective switching device with the features according to independent claim 10 solved. Further features and details of the invention will become apparent from the dependent claims, the description and the drawings. Features and details which are described in connection with the coil carrier are of course also in connection with the yoke, the electromagnetic release and the protective switching device, and in each case vice versa.

According to the first aspect of the invention, the object is achieved by a coil carrier of an electromagnetic release of a protective switching device comprising a first and a second end plate and a provided between the end plates hollow cylindrical body for receiving a coil, wherein at the end faces of the first and the second end plate axially parallel to Longitudinal axis of the hollow cylindrical body of the bobbin carrier is provided in each case at least one projection for attachment to a yoke, solved.

Such a coil carrier can be fastened in a yoke simply and safely without any additional additional elements, such as a core. Furthermore, the coil carrier can be attached to a corresponding yoke without much effort. In this case, it is not necessary to screw the coil carrier to the yoke, to weld, to solder or caulk. By the projections on the end faces of the first and the second end plate of the bobbin, the bobbin can be easily hooked into corresponding recesses of a yoke form fit. A form fit between the bobbin and the yoke is sufficient, since a final fixation of the bobbin on the yoke is carried by a two elements at least partially covering housing. Due to the special design of the bobbin This can be easily and quickly mounted to a corresponding yoke.

The bobbin has a first and a second end plate. Between the first and the second end plate, which are preferably arranged parallel to each other, a hollow cylindrical body for receiving a coil is provided. At the end faces of the first and the second end plate, the projections are arranged such that they extend axially parallel to the longitudinal axis of the hollow cylindrical body of the bobbin. The end faces represent in the light of the invention, the sides of the end plates, which are remote from the respective other end plate. That is, the projections form the outer end of the bobbin. As a result, the coil carrier can be hooked in a form-fitting manner in a corresponding yoke. After hanging the bobbin is firmly fixed in the yoke. The projections on the end faces of the end plates are simply inserted into corresponding recesses on the yoke, inserted or snapped. That is, the bobbin can be fixed to the yoke without further parts or elements. This means that no additional assembly tools, such as screw devices, welding devices, soldering devices, etc. are required. By a snapping behind the projections in their recesses of the bobbin sits without further fixation firmly in his yoke. This configuration of the bobbin saves in particular assembly time and thus costs.

A coil carrier is preferred, in which the at least one projection of the first and the at least one projection of the second end plate is designed as a pin, in particular as a cylindrical pin, or as snap lugs. That is, the pin represents a protruding from the end face of the end plate element. The pins can be variously be educated. So they can have a triangular, rectangular or oval cross-section. However, particularly preferably, the pins have a circular cross-section. The pins can be hollow inside, which saves material costs and weight. Preferably, the projections, ie the pins, are formed integrally with the corresponding end plate. But it is also conceivable that the projections are arranged by a non-positive or cohesive connection to the end plates. Thus, the projections may for example be glued or welded to the end faces of the end plates. A projection in the form of a snap-in nose represents another preferred variant of a projection. Snap-in lugs can not only be inserted into the depressions, but also engage behind the legs of the yoke, so that a particularly good hold of the coil carrier on the yoke can be realized.

Depending on the configuration of the yoke, the projections may be provided at different positions on the end faces of the end plates. However, a coil carrier is preferred in which the at least one projection of the first and the at least one projection of the second end plate are arranged coaxially with one another. This allows a simple hooking of the bobbin in the yoke, which has uniform recesses for receiving the projections. Thus, the yoke may have a U-shaped profile, wherein in each case one leg is provided at opposite ends of a base element. Are recesses provided on the end faces of the legs, the projections of the end plates of the bobbin can be easily inserted or inserted into these recesses, whereby a simple and secure fixation of the bobbin takes place at the yoke. The two legs of the yoke are preferably identical.

The projections of the first and second end plates may be provided at various positions on the end face of the end plates. A coil carrier is preferred in which the at least one projection of the first and the at least one projection of the second end plate are arranged on a side edge of the first and the second end plate. In particular, it is advantageous if at least two projections are provided on each end face of the first and the second end plate. This prevents possible rotation of the bobbin on the yoke. If the projections are provided on one side edge, the coil carrier can be securely hooked into the corresponding recesses of the yoke by snapping the projections onto the depressions of the yoke.

Further, a bobbin is preferred in which the at least one projection of the first and the at least one projection of the second end plate are each supported by a support member. As a result, the stability of the projections can be increased. The support element may for example be welded to a projection and to the corresponding end face. The support element may alternatively be formed integrally with the projection and the end face of an end plate. The support member is arranged on a projection such that it does not hinder the insertion of the projection into a recess of the yoke.

According to a second aspect of the invention, the object is achieved by a yoke of an electromagnetic release of a protective switching device comprising a U-shaped profile with a base member and two arranged on the base element legs, each having a recess in each leg for the passage of a plunger, wherein the End face of the first and the second leg of the yoke in each case at least one recess for the positive reception of the projections a bobbin according to the first aspect of the invention is provided solved.

Such a yoke enables the simple and secure mounting of a coil carrier of an electromagnetic release of a protective switching device having a first and a second end plate and provided between the end plates hollow cylindrical body for receiving a coil, wherein at the end faces of the first and second end plate axially parallel to At least one projection for attachment to the yoke is provided along the longitudinal axis of the hollow cylindrical body of the bobbin. In the light of the invention, the end faces of the first and the second leg of the yoke are the sides of the legs which are remote from the base element of the yoke. As a result, the coil carrier can be easily hung in the yoke. There are no other tools or tools needed to attach the bobbin to the yoke.

The legs are preferably perpendicular to the base member of the yoke. In some embodiments, it is also conceivable that the legs do not run at right angles to the base element.

Furthermore, a yoke is preferred in which the at least one recess of the first and the at least one recess of the second leg of the yoke have a semicircular base. Such a configuration of the depressions enables a good reception of the projections, in particular of the pins, of the end plates of the coil carrier. The pins can einliegen positively in the semicircular recess. In other preferred embodiments of the yoke, it can be provided that the base of the depressions, for example, tapers to a point. These are then tapered to receive Projections, ie of projections with an example triangular cross-section, suitable.

The depressions on the end faces of the yoke can always have the same width. Preferably, the recesses have a profile which widens at least in regions towards the end face of the legs of the yoke. Particularly preferably, these initially have a tapered, then widening course. That the projections on the coil carrier are pressed during assembly through a bottleneck and thereby secured against falling out. Before the constriction, the depression is funnel-shaped, so that the insertion of the projections of the bobbin can be simplified. This allows a more secure and faster attachment of the bobbin to the yoke. The coil carrier can be easily and safely snapped or inserted into the recesses of the yoke.

The yoke preferably has two recesses on each leg. In this way, a corresponding coil carrier with two projections on each end plate can be easily and securely fixed to the yoke. Due to the Hinterschnappung on the taper movement of the bobbin is then no longer possible.

In other preferred embodiments of the yoke, this may also have more than four depressions. The same applies to the coil carrier. This too can have more than four projections. The projections of a bobbin may also have different shapes. Thus, it is conceivable that a part of the projections are pin-shaped with a circular cross-section and part of the projections are pin-shaped with a polygonal cross-section. The same applies to the configuration of the recesses in the legs of the Yoke. These preferably have a form complementary to the configuration of the projections, so that the projections can be received by the recesses in a form-fitting manner.

According to a further aspect of the invention, the object is achieved by an electromagnetic release of a protective switching device, with a coil carrier and a yoke, wherein the coil carrier are formed according to the first aspect described above and the yoke according to the second aspect described above. Such an electromagnetic release can be mounted very easily. In other words, the coil carrier of the electromagnetic release can be connected to the yoke sparingly. There are no additional assembly tools necessary to make the connection. A tightening, welding, soldering or caulking of the yoke and the coil carrier is not necessary. Neither the yoke, i. the recesses of the yoke, nor the coil carrier, i. the projections of the bobbin, must be designed to be resilient in order to be connected to each other. It is also conceivable that the coil carrier sitting positively fit in the recesses of the yoke due to its own weight, so that a movement of the bobbin is no longer possible, especially if the bobbin is fixed by an already required housing element.

The yoke is a closed yoke due to its two legs. By using a closed yoke, a sufficient ram force can be generated. The bobbin is snapped or inserted directly into the yoke, with an insertion direction perpendicular or nearly vertical to the longitudinal axis of the trigger or the bobbin. The bobbin is thereby introduced with at least one projection on each of the two end plates in at least one recess on the end face of the yoke in this.

The bobbin is preferably formed of plastic, while the yoke is metallic. If a plurality of projections, in particular pins or snap-on lugs, provided on the end face of an end plate of the bobbin, results in a particularly accurate placement and a particularly secure hold of the bobbin on the yoke.

According to the last aspect of the invention, the object is achieved by a protective switching device with an electromagnetic release, wherein the electromagnetic release is designed as described above. The electromagnetic trigger preferably has a bobbin with a first and a second end plate and a provided between the end plates hollow cylindrical body for receiving a coil, wherein at the end faces of the first and second end plate axially parallel to the longitudinal axis of the hollow cylindrical body of the bobbin each having at least one projection is intended for attachment to a yoke. Furthermore, the electromagnetic release preferably has a yoke with a U-shaped profile, with a base element and two legs arranged on the base element, each having a recess in each leg for the passage of a plunger, wherein on the front side of the first and the second leg the yoke is provided in each case at least one recess for the positive reception of the projections of a previously described coil carrier.

Such a protective switching device can be, for example, a fault current (FI) circuit breaker or a circuit breaker (MCB). Furthermore, the protective switching device can be a combined RCCB. Under fault current circuit breaker in the light of the invention both mains voltage-independent residual current circuit breaker, so-called FI devices (FI, FI block, FI / LS) and mains voltage-dependent residual current circuit breakers, so-called differential current circuit breakers or DI devices (DI, DI block, LS / DI) understood.

Preferred is such a protective switching device, in which a plunger is provided, which is mounted on the legs of the U-shaped yoke. That is, the plunger is preferably not supported by the bobbin itself, but exclusively by the yoke. The plunger is mounted at two points in the parallel legs / flanks of the yoke. The inner diameter of the bobbin, i. the inside of the hollow cylindrical body of the bobbin, does not touch the plunger even at unfavorable tolerance position. As a result, friction losses are avoided. The plunger is arranged on the yoke, that it is secured against falling out only by a housing element. The yoke itself does not prevent the plunger from falling out.

Figur 1

einen elektromagnetischen Auslöser gemäß des Standes der Technik;

Figur 2

einen weiteren elektromagnetischen Auslöser gemäß des Standes der Technik;

Figur 3

eine Schnittdarstellung durch einen elektromagnetischen Auslöser;

Figur 4

eine perspektivische Darstellung eines in ein Joch eingehängten Spulenträgers;

Figur 5

eine perspektivische Darstellung eines fast in ein Joch eingehängten Spulenträgers;

Figur 6

eine perspektivische Darstellung eines in ein Joch montierten Spulenträgers;

Figur 7

eine perspektivische Darstellung eines Spulenträgers;

Figur 8

eine perspektivische Darstellung eines Jochs.

The invention will now be explained in more detail by means of embodiments with reference to the accompanying drawings.
Show it:

FIG. 1

an electromagnetic release according to the prior art;

FIG. 2

another electromagnetic trip device according to the prior art;

FIG. 3

a sectional view through an electromagnetic trigger;

FIG. 4

a perspective view of a suspended in a yoke coil carrier;

FIG. 5

a perspective view of an almost hung in a yoke coil carrier;

FIG. 6

a perspective view of a coil carrier mounted in a yoke;

FIG. 7

a perspective view of a bobbin;

FIG. 8

a perspective view of a yoke.

Fig. 3 shows a longitudinal section through an electromagnetic release 8 of a protective switching device. Within the U-shaped yoke 2, the bobbin 1 is arranged. The U-shaped yoke 2 has a base element 20 and in each case two legs 21, 22 arranged perpendicular to the base element 20. In the legs 21, 22 openings are provided in which a plunger 3 is mounted. In this embodiment, the plunger 3 is formed in two parts, wherein an outer plunger element 3b encloses an inner plunger element 3a. Further, a spring element 6 is provided, which returns the plunger 3 after elimination of a voltage in the starting position. The coil carrier 1 suspended in the U-shaped yoke 2 has a hollow cylindrical body 5 around which a coil 7 is wound. The bobbin 1 has at its ends in each case an end plate 11, 12, in which in this Fig. 3 not shown projections are provided, through which the bobbin 1 is attached to the yoke 2.

In the Fig. 4 and 6 a suspended in a yoke 2 bobbin 1 is shown. At the end faces of the legs 21, 22 of the yoke 2, two recesses 23 are provided in each case, which serve for the positive reception of the projections 13 of the end plates 11, 12 of the bobbin 1. The projections 13 are arranged on the end faces of the end plates 11, 12. The projections 13 are arranged axially parallel to the longitudinal axis of the bobbin 1. The projections 13 have a circular cross-section. The bases of the recesses 23 of the legs 21, 22 of the yoke 2 are semicircular, so that they can receive the circular projections 13 of the end plates 11, 12 positively. The recesses 23 have a first tapered to the end faces of the legs 21, 22, then widening shape. Through this funnel-shaped configuration, the projections 13 of the end plates 11, 12 can be very easily and safely inserted into the recesses 23. Due to the snapping of the projections 13 of the bobbin 1 to the taper of the recesses 23 of the yoke 2, the bobbin 1 sits securely in the recesses 23 on the yoke 2. This type of assembly of the bobbin 1 to the yoke 2 is particularly simple and quick to carry out because on the one hand no additional elements, such as a core or a spacer element, are required, on the other hand, the assembly is carried out without the aid of tools and aids, but only by compression by finger power.
The Fig. 5 shows the position of the bobbin 1 just before the positive reception in the yoke 2. The projections 13 are arranged on a side edge of the end plates 11, 12. To stabilize the projections 13, which have the form of pins, support elements 14 are provided. These are arranged on the projections 13 so that they are not hindering the insertion of the projections 13 in the recesses 23.

In the Fig. 7 a variant embodiment of a bobbin 1 is shown. At the ends of the hollow profile-shaped body 5 of the bobbin 1, a first 11 and a second end plate 12 are provided. The first 11 and the second end plate 12 are arranged parallel to each other. The projections 13 extend axially parallel to the longitudinal axis of the bobbin 1 and protrude from the end faces of the end plates 11, 12 out. To the hollow profile-shaped body 5, a coil, not shown, can be wound. In this case, at least one further separating plate 24 may be provided, which divides the outside of the hollow profile-shaped body 5 in at least two areas.

In the Fig. 8 is a possible embodiment of the yoke 2 shown as an example. At the end sides of the legs 21, 22, two recesses 23 are provided in each case, wherein these have a tapered toward the end face, then widening course. This is used for particularly easy insertion of the projections 13 of the end plates 11, 12 of the bobbin 1, as well as their Hinterschnappung behind the taper. The first end plate 11 has a smaller opening than the second end plate 12. The opening in the first end plate 11 serves to support the inner plunger element 3a, as in FIG Fig. 3 shown. The outer plunger element 3b is supported in the opening in the second end plate 12.

The electromagnetic release 8, which has a previously described coil support 1 and a previously described yoke 2, represents a very simple compact residual current release for a mains voltage-dependent protection device with combined protection function for line protection and residual current protection or a simple non-combined residual current device. The electromagnetic release 8 consists of a wound on the bobbin 1 coil 5, which accelerates the plunger 3a, 3b in its interior along the coil axis upon application of a voltage. The plunger 3a, 3b causes an impulse to a switching mechanism of the protective switching device. When removing the voltage of the plunger 3a, 3b is pushed back by the spring element 6 in its initial position. The yoke 2 closes the magnetic circuit, thereby significantly increasing the force of the electromagnetic actuator 8.

The plastic bobbin 1 can be fixed without additional parts in the metal yoke 2. This is done by simple and fast assembly operations, to which no further aids are needed. That the bobbin 1 is merely hung in the yoke, snapped or inserted. A screw, welding, soldering or caulking of the bobbin 1 to the yoke 2 is not required.

The coil support 1 according to the invention and the yoke 2 according to the invention make it possible to connect the coil support 1 of an electromagnetic release device 8 to the yoke 2 to save space. In order to produce a sufficient ram force, the yoke of the electromagnetic release is a closed yoke 2.

An advantage of such an electromagnetic release 8 is that the plunger 3 is mounted at two points in the parallel legs 21, 22 of the yoke 2 and not in the coil carrier 1. The inner diameter of the bobbin 1, i. the inside of the hollow profile-shaped body 5 of the bobbin support 1, the plunger 3 does not touch even at unfavorable tolerance position. As a result, friction losses are avoided.

The assembly of the bobbin 1 to the yoke 2 is simple, safe and does not require a core. Since the projections 13, in particular the snap-in lugs, are distributed over the entire coil carrier 1, a particularly accurate placement and a good hold of the coil carrier 1 in the yoke 2 result.

In particular, the mounting of a steel plunger 3 in a steel yoke 2 is particularly low friction and thereby ensures a maximum of ram force. In addition, the magnetic circuit thereby passes only through metal and not through the plastic bobbin 1, which would have a weakening of the ram force result.

LIST OF REFERENCE NUMBERS

1

coil carrier

2

yoke

3

tappet

3a, 3b

Inner or outer plunger element

4

core

5

hollow profile-shaped body of the bobbin

6

spring element

7

Kitchen sink

8th

electromagnetic trigger

11

first end plate

12

second end plate

13

head Start

14

support element

20

base element

21

first leg

22

second leg

23

deepening

24

separating element

Claims (12)

Coil carrier (1) of an electromagnetic release (8) of a protective switching device, comprising a first (11) and a second end plate (12) and a hollow cylindrical body (5) provided between the end plates (11, 12) for receiving a coil (7), characterized in that on the end faces of the first (11) and the second end plate (12) axially parallel to the longitudinal axis of the hollow cylindrical body (5) of the bobbin (1) at least one projection (13) for attachment to a yoke (2) is provided , Coil carrier (1) according to claim 1, characterized in that the at least one projection (13) of the first (11) and the at least one projection (13) of the second end plate (12) as a pin, in particular as a cylindrical pin, or as a snap-action nose formed is. Coil carrier (1) according to claim 1 or 2, characterized in that the at least one projection (13) of the first (11) and the at least one projection (13) of the second end plate (12) are arranged coaxially with one another. Coil carrier (1) according to one of claims 1 to 3, characterized in that the at least one projection (13) of the first (11) and the at least one projection (13) of the second end plate (12) on one side edge of the first (11). or the second end plate (12) are arranged. Coil carrier (1) according to one of claims 1 to 4, characterized in that the at least one projection (13) of the first (11) and the at least one projection (13) of the second end plate (12) each supported by a support member (14) is. Yoke (2) of an electromagnetic release (8) of a protective switching device, comprising a U-shaped profile with a base element (20) and two legs (21, 22) arranged on the base element (20), each having a recess in each leg (21 , 22) for the passage of a plunger (3), characterized in that on the end face of the first (21) and the second leg (22) of the yoke (2) each have at least one recess (23) for the positive reception of the projections (13) a spool carrier (1) according to one of claims 1 to 5 is provided. A yoke (2) according to claim 6, characterized in that the at least one recess (23) of the first (21) and the at least one recess (23) of the second leg (22) of the yoke (2) have a semicircular base. Yoke (2) according to claim 6 or 7, characterized in that the at least one recess (23) of the first (21) and the at least one recess (23) of the second leg (22) of the yoke (2) at least one towards the end have partially widening course. Electromagnetic trigger (8) of a protective switching device with a coil carrier (1) and a yoke (2), characterized in that the coil carrier (1) according to one of claims 1 to 5 and the yoke (2) according to one of claims 6 to 8 are. Protective switching device with an electromagnetic release (8), characterized in that the electromagnetic release (8) is designed according to claim 9. Protective switching device according to claim 10, characterized in that the coil carrier (1) is formed from plastic. Protective switching device according to claim 10 or 11, characterized in that a plunger (3) is provided which is mounted on the legs (21, 22) of the U-shaped yoke (2).

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