Untitled record

BBG BROWN BOVERl SHAREHOLDING

Mannheim April 14, 1988

Mp. No. 523/88 2iPT / P4-Ft / Ht

description

Explosion-proof electrical installation device

The invention relates to an explosion-proof electrical installation device according to the preamble of claim 1.

To form an explosion-proof line circuit breaker a non-explosion protected circuit breaker is inserted into a cup-shaped housing and therein after making the electrical connections to flameproof and Zünddurchschlagssicher executed bushings within the housing closed by a support plate is attached to the free edge of the housing, the then subsequently cast by casting resin. The operation of the circuit breaker from the outside is done either via a back and forth sliding actuator or via an operating crank, according to known

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Leifeüngsödhutasuhaitem. Multi-pole line contactors have not yet been installed in a pressure-tight encapsulated housing, because the coupling of the switching toggle of the side-by-side lined circuit breaker poles contains certain difficulties. Although it has become known to accommodate a multi-pole circuit breaker in a flameproof enclosure along with other installation equipment and thereby to operate the multipolar circuit breaker from the outside too; the connection of the switch knob, which takes place by means of a U-shaped, all switching knob detecting and all switching knob overlapping rail, could only be operated by means of an immediately above the circuit breaker arranged, designed as a hand crank actuator. The hand crank had inside the housing a fork-like gripper, which detected the U-shaped rail And in this way caused the operation of the circuit breaker. An explosion-proof circuit breaker that is designed as a multipole circuit breaker and can be operated from the outside, as a normal commercial circuit breaker, insofar, as the actuator performs a pivoting movement about an axis corresponding to the axis of the switch knob of the circuit breaker or the circuit breaker poles , is not yet known. This is due to the fact that a suitable rigid coupling of the switching poles with an operation that is also easy to assemble, is not yet known.

The object of the invention is therefore to perform a multi-pole circuit breaker explosion-proof, the operation of the explosion-proof

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Duct circuit breaker from outside the housing in the same direction as the normal operation of a commercially available, not explosion-proof circuit breaker. Of course, the invention should also | be applicable to residual current circuit breakers and combinations of circuit breakers and residual current circuit breakers or differential circuit breakers.

This object is achieved by the characterizing features of claim 1.

So according to the invention to use individual couplings, which are put over the switch knob, which individual couplings on the coupling rod? hold the end of the switch knob. This cup; plungsstange then interacts with the crank-type actuator, with the circuit breaker can be operated from the outside.

Under certain circumstances, there is a risk that the coupling rod is not sufficient to operate all switch poles simultaneously. For this purpose, each coupling piece according to the characterizing features of claim 1 has a U-shaped portion into which a stiffening rail, the all coupling pieces on;

bridges, is used. At least by the connection f or combined use of the stiffening rail and I of the coupling rod is an absolutely rigid coupling Ü · the switch knob of the individual switch poles to the short- '·

achieved f similar actuator. \

There are two options for fixing the coupling pieces. On the one hand, the fact is exploited that the side surfaces of the Sägehzeebel, parallel to

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Mp.-Nr. 523/88 ·· '·· · ■ 4 "" 14 April 1988

whose pivot axis run, grooves, then the coupling pieces can be locked according to the characterizing features of claim 5 via the grooves on the individual control knobs. In other switching devices in which the switching knob have bores which extend parallel to the pivot axis, the coupling pieces may be formed as specified in claim 6; The fixation of the coupling pieces is then carried out by pressing or clamping fit of the pin in the bore, as indicated in the claim 7.

If a residual current component is to be encapsulated explosion-proof together with the circuit breakers, then two sliding bolts are provided according to the characterizing features of claims 9 to 13, with which on the one hand the test button of the fault current component and the other mounted on the fault current component switching knob for resetting the fault current component according to its Trigger can be actuated.

Further advantageous embodiments and improvements can be found in the further subclaims.

Reference to the drawing, in which some embodiments of the invention are shown, the invention and further advantageous refinements and improvements and other advantages will be explained and described in detail.

It shows:

1 is a sectional view through an explosion-proof circuit breaker, cut parallel to the line connecting the terminals of a circuit breaker /

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FIG. 2 shows a sectional view according to section line II-II of FIG. 1,

FIG. 3 shows a sectional view through a circuit breaker with fault current component, similar to the sectional view according to FIG. 1,

FIG. 4 shows a sectional view through an installation device according to FIG. 3, similar to the sectional view of FIG. 2,

FIG. 5 shows a sectional view according to the section line VV of FIG. 4,

Figure 6 shows a further embodiment of the invention, and ⁿ Similar to the sections according to Figures 1 and 2 bziv. 3 and 4, and

Figure 8 sectional views of the switch knob with up to 10 coupling piece.

Referring now to Figure 1:

The explosion-proof electrical installation device is a multi-pole circuit breaker 10 with three circuit breaker poles 10/1, 10/2 and 10/3. The circuit breaker 10 is housed in a housing 11 having a cup-shaped housing part 12 and a housing closure 13. The cup-shaped housing part 12 has four side walls 14 and a Napfbodenwand 15, which has a central cap 16 and on both sides each have a circular arc-shaped portion 17 and 18 whose outer radius is determined by the circular motion of a crank-type actuator for the circuit breaker 10.

Mp.-Nr. 523/88 6 '* ** 14th April 1988

Each of the circuit breaker poles 10/1, 10/2 and 10/3 has a switch knob 20/1, 20/2 and 20/3, which are covered by a coupling piece 21/1, 21/2 and 21/3, which coupling piece in Figure 8 is shown in more detail in section.

Referring now to Figure 8:

From the end face of the circuit breaker 10 of the switch knob 20 protrudes, both of which, approximately parallel to the pivot axis of the switch knob 20 extending side surfaces 22 and 23 each have a groove 24 and 25, which grooves 24 and 25 are also parallel to the pivot axis of the switch knob 20. The coupling piece 21 is U-shaped with two U - legs 26 and 27, on whose inner surfaces each have a bar 28 and 29 is provided which are adapted and adapted to reach into the grooves 25 and 24. The one of the two legs 26, which is shown on the left in the drawing, has on its outer surface a dovetail-shaped recess 30, which receives a stiffening rail 31. The inner bottom of the coupling piece between the two legs 26 and 27 forms with the end face 32 a free space 33 which receives a coupling rod 34. In Figure 2 can be seen the coupling rod 34, which projects beyond the three switch poles 10/1, 10/2 and 10/3 to one side, here the right side, clearly and engages in a receptacle 35, depending on a bolt el 36 is attached, which is passed through a bushing 37 which is inserted in the side wall 14 of the housing, flameproof and flameproof rotatable. At the outside end of the bolt 36 is a lever arm 18, the free end of the section

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17 protruding, with ah its free end across it And the section 17, a Sdhältgriff 39 is attached, the free end is bent and with his Abkröpfühg 40 in a located between the section 17 and the attachment 16 recess 41 engages whereby a guide of the operating handle 39 is effected. All of these components 35 to 40 form the actuating device 19. The upper surface of the attachment is used for 2UITi Bsfsstigsn vsn type nbsssichnung and the like,

In the circuit breaker 10 terminal lugs 42 and 43 are used, which are connected to non-illustrated terminals on the circuit breaker 10. These connection lugs 42 and 4? are each connected to the inner end of a feedthrough bolt 44 and 45, here screwed by means of screws 46 and 47 thereto; the bushing bolts 44 and 45 are parallel to the side walls 14 and that the number of switch poles 10/1, 10/2, and 10/3 corresponding bushing pins 44 and 45 are present. The outer end of the bushing bolts is provided with clamping screws 48 and 48, to which leads can be attached.

The circuit breaker 10 is located at its lower end on a support plate 50 which are formed against an inner circumferential shoulder 51 on the Innenwandüng the Seitenwänae 14; the remaining area between the support plate 50 and the free Endfand the side wall 14 is poured with casting resin 52.

The embodiment according to FIG. 3 is virtually identical to that of FIG. Differences exist insofar as the housing 11 for receiving a

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Fault-current circuit 60 is equipped with conductive suction oils 61/1 and 61/2,

With reference to FIG. 5:

One recognizes the attachment 16 and the Pehlerstrombauteil 60 together with a switch knob 62, on the switching ^ knob 62 aufgestzt the coupling piece 21, which leads Kuppiuncjsstsncjs 34 and ip.it your switch knob 52-connects. The cap 16 has a perpendicular to the lower support plate 50 extending bore 63 which performs a sliding bolt 64 ignition resistant, which has a mushroom head 65 at its located outside of the cap 16 end and a print head 66 at its end located inside. By operating the sliding bolt 24 in Pfeilrichtüng P arranged below the sliding bolt 64 Prüftastknopf (not shown in detail) of the fault current component can be actuated. Perpendicular to the orientation of the sliding bolt 64, a further sliding bolt 67 is provided in the attachment 16, which is likewise inserted into the housing in such a way that it can be fended off by an opening 68. The further sliding bolt has at its outer end a mushroom head corresponding mushroom head 69; At its located in the interior of the housing end of the sliding pin 67 has a transverse pin 70 which projects into the path of movement of the switch knob 62 with Küpplungsstück 21 and at this end has a bevel 71. This further Schiebebc-izen 69 is used to actuate the switch knob 62 in the direction of arrow B and it is acted upon by a tension spring 72 constantly in the direction of arrow E. The tension spring 72 is hinged on the one hand to a screwed into the housing screw 73 and the other on the transverse pin 70, so that the inclined surface

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71 always in contact with the coupling piece 21 * If due to a Fehleräüslösüng the switch knob 62 extends into the position shown in Figure 5, therein the Schaltkriebel 62 by means of the further¹ beboizeris 67 again be switched back into the azo release position or pushed back, the switch knob 62 is pivoted in Pfeilridhtung B.

Since the two Lsitungs-Bchutzschalterpole 61/2 and 61/1 are coupled via the coupling rod 34 · must be pivoted to turn on both the further sliding pin 67 and flie actuator 19.

From Figure 4 it is apparent that the coupling rod Ab-Bchnitte has different cross-section, namely in the area within the Küpplungsstückes a smaller cross-section and between the two peel poles 61/1 and 61/2 has a larger diameter 6er 34/1; this area serves to keep the coupling rod in the correct position in the assembled state. If several switch poles are present, then the coupling rod also has the number of spaces between the switch poles corresponding areas with a larger cross-section.

The support plate 50 is fastened to the housing 11 by means of screw connections 74.

Figures 6 and 7 show a similar embodiment as Figures 3 to 5. The following is different:

On the end face of the circuit breaker 10, an approximately Z-förmigsr attachment 80 is fixed by means of a rivet 81. This essay 80 contributes

Mp.-Nr. 523/80 · "* '· ··'^! ifi * "14, April 1988

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SGhältei? 82 And in the dovetail-shaped ÄUgäpai'ünc 30 the Küpplüngsstückes 21 is a bending spring 83 ein-

which, when the switch knob 22 in Pfeilridh-

Is pivoted B, with the pin 84 of the micro-

age 82 gets in touch; that by closing

the micro switch 82 generated electrical signal is passed through a terminal 85 to the outside. To these

Ö'le through an Anöchlußleiter to the line 87 to the micro switch is hindurdhgeführt, which lead is electrically conductively connected to a U-shaped flag 88 in the interior of a molded with resin 89 recess 90. The outer end of the terminal lug 88

then carries the clamping screw 85. With this signal is?! the switching position of the switch in the interior of the housing 11 to the outside electrically displayed.

From Figure 6 it can be seen that the actuating device 19 can also be arranged on the opposite side as shown in Figures 1 and 2. There is no difference to bonuses.

Figures 9 and 10 show two different embodiments of the coupling piece. While the coupling piece 21 with the strips 28 and 29 in the grooves 24 and 25 and reverse engages, although the coupling piece 95 has two legs 96 and 97, wherein the leg 96 includes the recess 30 for receiving the stiffening rail 31; at one end, however, the gap between the two legs 96 and 97 is covered by an end wall 98 to which a stitching pin 99 of different height is formed; the free end of the spigot is in its cross section opposite the

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rejuvenated endwsndseitigen end. This piercing pin 99 engages in a rectangular opening or hole 100 in the switch knob 101 of a circuit breaker 102 and the portion of the spigot 99 with a larger diameter clamped within the aperture 100. On the outer wall of the end wall 98, a pin 103 is formed, in the receptacle 35 of the actuator 19 can intervene.