DE1690137B2 - ELECTRIC CIRCUIT BREAKER, ESPECIALLY LOW VOLTAGE CIRCUIT BREAKER - Google Patents

Description

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The F i g. 1 and 2 show a fixed switching device. If the molded part 26 is produced by casting, see FIG

piece 1. the two symmetrically designed components 27. 27 'during the casting process in

contact parts 2. 2 ', which are anchored with mutual ab- the molded part,

stood on a bolt 12 pivoted. Another form of a movable contact piece

are. The contact parts 2, 2 'have an angled 5, the F i g show. 5 and 6. That shown in these figures

Shape with legs 3. 4 and 3 '. 4 'on. that in the truncated contact piece 40 consists of a molded part

fen angles are to each other, as F i g. 2 times. The 41st formed as well as the molded part 26 and

Ends of the legs 4. 4 'carry supports 5. 5' can be made from. In the molded part 41 are boar

wuiframhaitigem contact material, z. B. a. In general, symmetrically formed components 42, 42 'are made

ram-copper composite. These editions are made of ferrous material, which over the

With the contact parts 2, 2 ', for example molded part 41, protruding webs 43, 43' can be used as guide

be connected by brazing. edges for arcs and angled legs

On the mutually facing sides of the contact 44, 44 ', which are attached to a contact pad 45

parts 2.2 'are made of a ferrous alloy, e.g. B. made of tungsten-containing contact material flush

a stainless steel, existing components 6. 6 '15 close.

attached, their Steee 7. 7 'over the contact- In contrast to the iron parts previously described 2. 2 'protrude and guide edges for the components in question run the webs 43. 43' of the Schallen gebildeve form arcs. Furthermore, components 42, 42 'are not spaced apart from one another zen the components 6, 6 'in opposite directions parallel to each other, but are at an acute angle lines angled Schenkei 8,8 ', which are arranged flush 20 such that:, 1 upper end 46 of the adjoin the supports S, 5 ', as shown in FIG clearly shows. The legs 8,8 'form the see them is in place. The webs 43, 43 'of the Metal parts on which the arc from the contact components 42, 42 'are placed symmetrically in that way transgresses. angles that their ends touch or only

The contact parts 2, 2 'are independent of one another and are at a small distance from one another, such as

which can be pivoted against spring force on a support F i g. 5 shows particularly clearly

piece 10 arranged. In a breakthrough in this In the contact system of a self-switch, both

The support piece engages the contact parts 2, 2 'with, for example, a contact piece according to FIGS. 1 and 2 as

zen one, of which in Fig. 2 the extension 11 fixed contact piece and a contact piece after

chelt is shown. Through holes in the ground. 3 and 4 as a movable contact

Select approaches and can be turned through further holes. Does that serve in Figs. 5 and 6 shown

the support piece 10 extends a bolt 12, the set contact piece as a movable contact piece, so

compared to the contact parts 2, 2 'by means of an insulating it is advisable to have a fixed contact piece

socket 19 is isolated. The legs 4,4 'each carry correspondingly shaped components made of ferrous

a Boize.i 13, which can be used through an opening 14 in the 35 material. On the other hand you can too

Support piece 10 reaches through. On each of the bolts 13 two identical contact pieces as shown in FIG

acts via an insulating pressure piece 15 one and 4 or 5 and 6 as fixed and movable

Helical spring 16, which cooperate against a leg 17 switching pieces,

of the support piece 10 is supported. By means of the screw, the co-workers are at rest

16, the contact parts 2, 2 'are 40 contact pieces with the supports made of woiframhaltigem in the idle state

with the ends of their legs 7,7 'to a contact material to one another, in known

impact 18 of the support piece 10 created. The two ways one in the drive system of the automatic switch

Contact parts 2, 2 'are the desired contact pressure on the bolt 12 or the existing spring

Isolation bushing 19 can be pivoted independently, as that delivers. According to this contact pressure, the

Pressure piece 15 between the spring 16 and the BoI 45 helical spring 16 (Fig. 1) pushed through. When leaving

zen 13 acts as a rocker. lifting of the moving contact piece from the stationary

The support piece 10 can with its surface 20 on the contact piece is between the contact pads

a current conductor is put on and ignited with this by an arc, if a sufficient one

suitable means, e.g. B screws, to be connected. Electricity flows. The base points of this arc are

With the described contact piece 1, the contact piece 25 shown in 50 because of the fact that it is rapidly moving away from the contact pads in FIGS. The switching 44 'of the components, so that the contact pads 25 also consist of a molded part 26 which can withstand very high short-circuit currents, for example as a cast or hot-pressed part made of brass or copper can be made. In the form- 55 of the arc are claimed. The overriding part 26 are components 27, 27 'made of iron, the th of the base points of the arc on the contact pads adjoining the described components 6, 6' (Fig. 1 and 2) (which agree and which are also arranged in such a way) The angled trough of the components made of ferrous webs 30, material protruding beyond the molded part 26, happens particularly well when no 30 'leading edges for arcing are formed. In the Go air gap or only thin metallic foreign layers, the components 27, 27 'are provided with angled between the named parts, celt legs 31, 3Γ, which are from the angled legs of the ferrous flush to a support 32 made of tungsten In the case of components, the base points of the arc contact material "form the metal parts attached to it

The lower end 33 of the molded part 26 is made 65 is favored by a mechanically smooth transition,

formed that it can by means of suitable connecting elements, such as on the basis of the embodiments

ments, e.g. B. Smraub, described on the shift lever, best by summarizing the

Circuit breaker can be attached. metal parts adjoining the contact pads

can be achieved with the webs forming the leading edges to form common components.

The arc is elongated by running along the arc roots on the webs. A suitable extinguishing chamber can interact with the contact pieces described, into which the Arc crosses from the upper ends of the contact pieces.

When the contact pieces are closed, the spring 16 (FIG. 2) is again in accordance with the contact pressure pushed through. This leads to a rolling movement between the contact pads, whereby foreign layers are destroyed. This reduces the transition resistance between the contact pieces. Ie independent pivotability of the contact parts 2, 2 on the bolt 12 and the insulating sleeve 19 guaranteed an even distribution of the contact pressure on the two supports 5.5 '. It can also a further subdivision de:

ίο switching piece 1 can be made.

1 sheet of drawings

Claims (5)

1 2 lay remains and they are destroyed. The reason for patent claims - the control of the arc is to be seen in it. "'that tungsten has a high emission of electrons. As a result, the foot points on the con- 1.Electric circuit breaker, especially j clock requirements, because there is a large on-low-voltage circuit breaker, with is formed by the number of load carriers. a drive mechanism relative to each other, on the other hand, it is known. Arc switchable Arcing contact pieces that are arranged over pieces with two spaced apart Contact parts of the contact pieces protruding. th webs to provide the leading edges for the Form leading edges for the arc forming io arc. This creates a lateral separation have, thereby marked- wandering of the arc roots avoided (interprets, that both interacting switches see patent specification 482 116). pieces (25) with a per se known edition The invention is concerned with an electrical (32) made of tungsten-containing contact material, circuit breakers, in particular a low chip and that in addition to the supports (32) on 15 nuigs circuit breakers. by a drive the desired direction of travel of the electric arc mechanism that can be moved relative to one another corresponding side has a ferrous contact piece that is connected to the contact parts of the hooked material existing metal part (31) contact pieces protruding, leading edges for the is arranged on which the webs (30, 30 ') have arc-forming webs. According to the tapping. 20 finding are both interacting contact pieces 2. Circuit breaker according to claim 1, characterized with a known support made of tungsten halide, that in each case a contact material is provided to the contact tigers, and next to the support (32) of a contact piece (25) is on the one of the desired direction of travel of the of the metal part (31) and a guide channel arc corresponding side from one forming web (30) to a common structural iron-containing material part of existing metal part (27) are combined (Figs. 3 and 4). arranged, to which the webs connect. 3. Circuit breaker according to claim 2, characterized in that it has been shown that the base points of a characterized in that two components (27, 27 ') parallel arc on the one next to the contact pads anallel are arranged to one another, the symmetrically ordered ferrous metal parts willingly trically bevelled to opposite sides, step over 30 and then taken over by the webs Legs (31, 31 ') which form metal parts are possessed. In this way, the high level of burn-off. strength of tungsten-containing contact materials for 4. Circuit breaker according to claim 2, thereby utilizing both interacting contact pieces characterized in that as a guide, two edges are, because the arc base points through the bezum End of a contact piece (40) in the pointed 35 special arrangement and nature of the metal angle mutually extending webs (43, 43 ') parts are quickly set in motion. of components (42, 42 ') are used, the further, according to In the context of the invention can each be an beveled on the inside and connect to the contact pad of a switching piece (45) adjoining legs (44, 44 ') have a metal part and one that forms a guide edge Zen. 40 web be combined to form a common component. 5. Circuit breaker according to claim 1, characterized in that for the arcing base points this is unmarked that the components (27, 27 '; 42, broken path created so that the base point 42') made of a ferrous alloy with high migration is not hindered.
Heat of fusion, in particular a rust-free one. Expediently, there can be two stainless steel on the contact pieces. 45 such components are arranged parallel to one another be that have beveled legs on opposite sides, through which the to the contact Supports subsequent metal parts are formed. In another advantageous embodiment 50 can be two leading edges for the arc towards the end of each contact piece at an acute angle The contact pieces of electrical circuit breakers, mutually arranged webs of components are used, as they are, for example, in low-voltage distributors - the other, inwardly angled legs have treatment systems are used, graze through the zen. These legs also connect to the switch on high temperatures that occur with high currents. doors of the arc are heavily used. The components can be made from both magnetizable The edge on the contact pieces limits the housing as well as those made of non-magnetizable iron alloys ability and also the amount of current that can be produced with the. They have also proven to be advantageous Contact pieces can be switched off. rustproof stainless steels with a high melting heat Although there are materials known that compared to 60 sen. high temperatures, such as those occurring in arcing. The invention is described below with reference to the in ten, are relatively stable. These include the embodiments shown in the figures. For example, tungsten and tungsten-containing contacts are explained. materials. In the circuit breakers of the aforementioned Die F i g. 1 and 2 show a fixed switching Art, however, it has been shown that the use of 65 pieces in two views. Tungsten-containing contact pads on each of the two. Two embodiments of movable switching co-operating mechanisms Contact pieces to difficulty pieces are shown in FIGS. 3 and 4 or 5 and 6 shown leads because the arc hits this contact.