DE8126777U1 - Circuit breaker - Google Patents

Description

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SIEMENS AKTIENGESELLSCHAFT Our mark Berlin and Munich VPA 81 G 4 O h O DE

Belt protection switch

The innovation relates to a miniature circuit breaker, the latch of which is connected to the armature of a magnetic release is latched directly, in that the anchor forms a support for the pawl at the latching point, and the one between this armature and its yoke as a functional part of a thermal release on a bimetal Heating coil carries. Such magnetic releases are also known as rail magnets.

During shutdown processes, a high voltage drop can occur on the heating coil of the bimetal for the thermal release occur that lead to overlaps to the Verklinkungsstel-Ie can lead to the anchor. During the rollover there is then a parallel to the intended current path of the switch Current path that destroys sensitive components during the flashover. This problem is typical of thermal release, the bimetal of which has a heating coil, which means that it is indirectly heated.

25th

The innovation is based on the task of a circuit breaker with directly latched magnetic release and indirectly heated thermal release, in which flashovers at the latch point are avoided.

The solution to the problem described is that the support at the notch with a molded piece

No 2 Council / 08.09.1981

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is covered from insulating material. Because of the potential separation at the unlatching point, it is also possible in the event of a fault no arc between the armature forming the support and the pawl during the unlatching process to be pulled. You can therefore use the advantages of the directly latched magnetic release without any worries. With indirect latched switches such high voltages, which could lead to flashovers, can generally not occur due to the design principle. However, ter are more complex. You need more components for the indirect latching. With such well-known Plastic parts have also been used at the latching point for the mechanical sequence of switches to influence the unlocking.

1S

The molded piece made of insulating material, according to the innovation, can be arranged in a recess of the armature. To do this, it can be pressed in cold or you can inject warm.

20th

According to one embodiment, the molded piece made of insulating material can also be provided with snap-on tabs that are attached to the notch over the wall of the anchor. Such a fitting can be snapped onto the anchor wall, for which one can also provide locking bulges in a manner known per se.

The innovation is to be explained in more detail with reference to exemplary embodiments shown roughly schematically in the drawing will:

In Fig. 1, a circuit breaker with direct latching is shown, partially broken, illustrated.

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In Fig. 2 is a combined indirectly heated thermal and a magnetic release for the circuit breaker reproduced in perspective.

In Fig. 3 is an embodiment of the Verklinkungsstel-Ie reproduced in sectional view. In FIG. 4, the latching point according to FIG. 3 is in Top view, but without a latch, shown. In Fig. S is another embodiment in the Representation according to FIG. 3 reproduced. (^ In Fig. 6 is the plan view of the latching point shown according to FIG.

In Fig. 7 is a further embodiment of the latching point reproduced.

In FIG. 8, the top view of the latching point according to FIG. 7 is shown.

The circuit breaker 1 according to FIG. 1 has a pawl 2, which is connected to the armature 3 at the latching point forms a support for the pawl 2. Between the armature 3 and its yoke 5 according to FIG. 2 is a functional part a thermal release on a bimetal 6 a / heating coil 7 is arranged. When the anchor 3 by the Effect of the magnetic field of the current flowing in the yoke 5 is attracted, the pawl 2 can at the latching point 4 are released.

The support at the notch 4 is covered with a molded piece 8 made of insulating material, as it is particularly can be clearly seen from FIGS. 3 and 4. The shaped piece 8 is arranged in a recess 9 of the armature 3. The shaped piece 8 according to this first exemplary embodiment can be pressed into the recess 9 while cold

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or you can also inject it warm. In Figures 5 and 6 is another embodiment for a molded piece 8 reproduced in the manner of FIGS. 3 and 4.

According to FIGS. 7 and 8, the molded piece 8 made of insulating material can also be provided with snap-on lugs 10 and 11 which grip over the wall of the armature 3 at the latching point. The snap tab 10 is thinner and tapered and is therefore particularly flexible. With a latching bead 12, it can latch into an associated recess in the anchor () 3. The snap tab 11 then serves more as a reference base.

The shaped piece 8 can enclose a spring-hard metal shaped piece which is exposed at the latching point. That Metal fitting is then with the exception of the latching surface even encased by insulating material. This creates a metal cladding for high latch pressure with simultaneous galvanic separation of the components at risk of flashover.

4 claims for protection
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if. summary

* Line circuit breaker

The invention relates to a line circuit breaker, . its pawl (2) with the armature (3) of a solenoid release

I is directly latched by the anchor (3D on

1 of the latching point (4) a support for the latch

I (2) forms, and between this anchor (3) and his

^ Yoke (5) as a functional part of a thermal release I carries a heating coil on a bimetal. After the

1: invention is provided that the support at the latching point (4) is covered with a molded piece (8) made of insulating material.

Fig. 1

Claims (4)

- 5 - VPA 8t 6 4 O 4 O OE protection claims 1. Circuit breaker, its pawl (2) with the armature C3) of a magnetic release is latched directly by placing the armature (3) on the latching point (4) for the pawl (2) forms, and between this anchor CSD and its yoke (5) as a functional part of a thermal Trigger carries a heating coil on a bimetal, characterized in that the support is covered at the latching point (4) with a molded piece (8) made of insulating material. 2. Circuit breaker according to claim 1, characterized characterized in that the molded piece (8) made of insulating material is arranged in a recess (9) of the armature (3) is. 3. Circuit breaker according to claim 1, characterized characterized in that the molded piece (8) made of insulating material is provided with snap tabs (10, 11), which reach over the wall of the anchor (3) at the notch. 4. Circuit breaker according to claim 1, characterized characterized in that the shaped piece (8) encloses a spring-hard metal shaped piece, which at the ver ~ · Klinkungsstelle is exposed.