Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/08—Terminals; Connections
  • H01H71/082—Connections between juxtaposed circuit breakers

Definitions

• the invention relates to a modular device according to the preamble of claim 1.
• Such a modular device designed as a circuit breaker is known from EP 0 552 113 B1.
• the problem with the stringing together of such devices is that the air insulation distance between the exposed conductive parts of adjacent terminals must be maintained in the open area of the busbar connection.
• the size, in particular the width, of the terminals used is then measured. This in turn has a major influence on the dimensions of the modular device, in particular the internal structure.
• the invention is based on the object of providing a modular installation device with a clamp, in which, while maintaining the required air insulation distance, an insulation capacity which is optimized compared to the prior art is provided in an enlarged receiving space.
• a modular installation device with a housing and a clamp arranged therein with a clamping screw, pressure piece and clamping frame, a connection-side first recess for the transverse reception of a busbar housing and clamping frame penetrates, and the insulation distance between the outer edge of the clamping frame inside the housing and the outside of the adjacent closed housing side is smaller than the air insulation distance between the outer edge of the clamping frame in the region of the recess and the outside of the adjacent housing side.
• the clamping frame has a constriction in the region of the recess.
• the clamping frame can also be expanded in the closed area. This makes it easy to increase the terminal space by a few%.
• the width of the clamping frame can be reduced in the area of the constriction by approximately 0.2 to 3 mm, in particular by 0.5 to 1.5 mm, especially by approximately 1.2 mm.
• the constriction can be a recess, e.g. Milled or pressed-in, be designed. This provides a strong clamping frame with a stepless receiving space, which is also very stable. Alternatively, the constriction can be designed as an installation or deformation. This provides a material-saving clamping frame with a large holding space.
• the side wall thickness of the housing can be greater in the region of the recess than that in the closed region of the housing. This provides good insulation protection in the transition area, especially in the creepage distance area.
• the rail mounted device ter as line protection scarf ⁇ or fault current circuit breaker is designed.
• FIG. 1 shows a circuit breaker in an external view
• FIG. 2 shows a longitudinal section through the circuit breaker according to FIG. 1 in the region of a connection terminal
• FIGS. 6 to 8 different views of the edition according to FIGS. 2 to 5 and FIG. 9 a longitudinal section through a clamp.
• the built-in device 1 shows a built-in device 1, in particular a circuit breaker or a residual current circuit breaker, in a three-dimensional external view.
• the built-in device 1 can contain any functions or internals.
• the design of the terminals or connection terminals contained is essential to the present idea, essentially only one of two being described below by way of example.
• a manual control knob 5 is arranged on the front face of the housing 3.
• the housing 3 has a recess 7 with which the device can be mounted on a holding rail, e.g. a top-hat rail that can be snapped on.
• the reference number 4 designates fastening means, not described in any more detail, which permit non-positive fastening to the top-hat rail. These are generally known in the prior art.
• the built-in device 1 On its front and rear, the built-in device 1 has openings through which a terminal (not shown in more detail in this illustration) is accessible, via which an external circuit or circuit can be connected to the built-in device 1.
• the clamping screw of the clamp is accessible via a first opening 9.
• the connection opening 11 serves to insert one or more connection wires into the connection space of the terminal.
• the clamp used in the present case is accessible via a further opening, so that a so-called "SD clamp" is formed.
• the clamp shows the se 3 and the clamping frame 21 transversely penetrating first recess 13. Via this first recess 13, a plurality of modular installation devices can be connected to one another transversely by a common busbar. In principle, such a busbar connection from the
• EP 0 552 113 known.
• an insulating cover 15 is shown, which serves as protection against contact for live parts of the terminal.
• the clamp 17 has a clamping screw 19, by means of which a clamping frame 21 is connected to one another so that it can be displaced relative to a pressure piece 23.
• the clamping frame 21 is penetrated by the first recess 13 on its two opposite side walls 22 for receiving the busbar already mentioned above.
• the clamp 17 is generally constructed in the manner of an elevator clamp.
• the pressure piece optionally has clamp feet 27 on both sides, which are provided for forming a vibration protection device.
• the housing 3 has namely in its upper region (in the region of the pressure piece 23), starting in the region of the bevels 29, a narrowed interior.
• the spring-like clamping feet 27 thus allow the pressure piece 23 to be jammed in the upper region of the housing.
• the clamping frame 21 has a connection point 35 on the bottom.
• the clamping frame 21 is made of a band-shaped, in particular metallic, material.
• the connection point is preferably designed as a clinch or clamp connection.
• connection point 35 is covered by a support 37 which is arranged on the inside of the clamping frame 21. As can be seen in FIG. 2, there is an intermediate space 39 between the support 37 and the connection point 35.
• the support 37 thus does not touch the connection point 35 of the clamping frame 21.
• the support 37 rather spans the connection point 35 like a bridge.
• clamping frame 21 and support 37 apply equally and analogously to FIGS. 3 to 7.
• FIG. 3 shows the clamping frame 21 with the support 37 in a front view looking into the receiving space 31.
• the flange 43 on the head side has a thread on the inside for receiving the Clamping screw 19.
• the support 37 can optionally overlap the front and possibly also the back of the clamping frame base 45 in the manner of an apron.
• incisions 49 are provided on the side.
• two sheets 51 are formed which engage in a bent manner below the clamping frame base 45. See in particular also the bottom view according to FIG. 5. In this way, the support 37 is firmly held on the clamping frame 21.
• connection technology used here as an example.
• the two ends of the clamping frame 21 engage in clinching or engagement technology.
• the first end 53 has a hammer head-like configuration and the second end 55 has a matching opening.
• the two ends 53 and 54 are firmly connected to each other in the pulling direction.
• this connection can also be made by other methods known in the art, e.g. a crimped or welded connection.
• the clamping frame 21 and the support 37 are partly shown in section. It can be seen that there is a distance A between the support 37 and the clamping frame base 45 in the region of the connection point 35.
• This preferably has a thickness or a dimension of 0.1 mm to 2.0 mm, in particular 0.2 mm.
• the support 37 has a support foot 57 on the underside of this underside, in particular at its four outer corners.
• the height of the support feet 57 is such that the described distance a is achieved.
• more than four support feet or, if necessary, a strip can also be provided on the edge.
• the embodiment shown here is preferably chosen because it can be implemented as a simple stamped part.
• the support feet 57 ensure that a longitudinally occurring force is as direct as possible is introduced into the side walls of the clamping frame 21. A load on the connection point 35 is thus prevented.
• an arch-like configuration of the support 37 is also possible without feet.
• the clamping frame 21, as shown at its upper corners, can have a predetermined bending radius R on the inner edges of its clamping frame base. If the support feet 57 come to rest in the region of the radius, an outwardly acting force can possibly also be generated, as a result of which a tensile load is exerted on the connection point 35. The connection point 35 is thus stabilized and solidified. Of course, this only applies in the case of a non-positive connection of the two ends 53 and 55.
• FIG 6 to 8 show the configurations of the support 37 in detail.
• the spatial view according to FIG 8 gives an impression of the edition.
• the support is designed without incisions 49 and tabs 51.
• the wedge-like elevations 41a rising towards the side walls are designed as an impression or shape of the support 37.
• the support 37 has a profile 59 in the manner of grooves or grooves. This prevents inserted wires or busbars from slipping out - regardless of the direction of insertion. This has for along introduced wires and cross milled ⁇ put busbars. In the rear of the Profileie ⁇ tion is 59 continued, so that the effect is given only for longitudinally inserted wires here.
• the wedge-like elevations 41a which can also be described as cone-section-like, are also clearly visible in the spatial representation.
• the support 37 has rear grips 61 so that it is held in the clamping frame 21 both from the front and from the rear.
• the contacting surface opposite the support 37 can be imprinted on the surface of the support 37.
• the opposing elevations thus mesh with one another in a tooth-like manner. It is essential that there is good electrical contact with mechanical strength for inserted wires or cables.
• the first recess 13 can have a hook-like elevation 63 on the edge (FIG. 4). This makes it possible to claw into a flat busbar. When using a round busbar in the manner of a rod, this is virtually encompassed by the elevation 63. It is no longer possible to simply roll it out.
• the intermediate piece 33 has a trough 65 on the support side, which likewise enables a round busbar to be gripped in connection with the elevation 63.
• the intermediate piece 33 shown serves on the one hand to connect the terminal 17 to an electrical circuit within the housing 3. For this purpose it has a connecting lug 67. In this drawing, only one receiving space 31 is shown. By opening the clamp 17 wide, the intermediate piece 33 can be arranged in the center, so that, according to FIG. 2, a two-part receiving space is formed.
• the intermediate piece 33 has an extension 69 on the bottom of the clamping frame. This serves on the pressure piece 23, and thus acting on the clamping screw 19 transverse forces ⁇ trap. Without this extension 69, a wedge or rotation of the pressure piece 23 would take place when a round busbar was inserted, which in turn would result in a transverse loading of the clamping screw 19 and the plastic parts surrounding it, in particular its fastening in the housing 3. In the present case, these transverse forces are intercepted directly over a short distance and supported on the clamping frame 21.
• the intermediate piece 33 is constructed in two parts. On the one hand, it comprises an angled lower part 71.
• Another aspect of the new built-in device 1 is the dielectric strength in the area of the first recess 13. In principle, it is desirable to make the clamping space or receiving space 31 as large as possible. On the other hand, if such devices are lined up, a predetermined air insulation distance between exposed metal parts of adjacent devices must be provided. This applies in particular to the area of the first recess 13, in which live parts are close to one another in the case of built-in appliances.
• the clamping frame .21 is made thinner at the edge in the area of the first recess 13 than in other areas. If necessary, the housing 3 can be made thicker in this area, adapted to the clamping frame 21. See in particular FIGS. 2 to 5, in which the design of the clamping frame 21 is shown. Inside the device, namely where there is sufficient insulation, the housing wall is made thinner. Accordingly, the clamping frame 21 has a thicker wall thickness in this area. In this way it is achieved that with a large receiving space and high tensile strength of the clamping frame 21 - due to a fundamentally strong material design in the open connection area for busbars - there is a correct - relatively large - clear distance.
• this configuration of the clamping frame 21 can also be achieved in that, starting from a thin material thickness of the clamping frame 21, the latter is widened in the closed area of the housing 3, that is to say it is bent outwards, so that it has two clear widths.
• the clamping frame 21 it is provided that, starting from a uniform material thickness of the clamping frame 21, the latter has second recesses 73 on the outside in the region of the first recess 13. If the clamping frame 21 is thinned by a few tenths of a mm, the desired dielectric strength can thus be achieved.
• the constriction or thinning of the clamping frame 21 can be produced by milling or pressing the wall and is approximately 0.5 to 3 mm, in particular approximately 1.2 mm.
• the insulation distance I between the outer edge of the clamping frame 21 within the housing 3 and the outer edge of the adjacent closed housing side is smaller than the air insulation distance L between the outer edge of the clamping frame 21 in the region of the first recess 13 and the outside of the adjacent housing side.
• the design of the clamping frame 21 in the other closed area of the housing 3 can also be viewed as widening or reinforcement. It is essential that the clamping frame 21 is designed for mechanical stability on the interior side and is adapted to the corresponding electrical values in the open edge area in combination with the wall of the housing 3. In principle, it is also conceivable that the Clamping frame 21 is made of two sub-frames of different widths, so that the insulation effect described above is given.

Landscapes

• Connections Arranged To Contact A Plurality Of Conductors (AREA)
• Installation Of Bus-Bars (AREA)
• Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
• Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
• Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
• Clamps And Clips (AREA)

Applications Claiming Priority (3)

Publications (2)

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Family Applications (1)

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• 2000
  • 2000-04-13 DE DE10018351A patent/DE10018351C2/de not_active Expired - Fee Related
• 2001
  • 2001-04-05 ES ES01931414T patent/ES2276789T3/es not_active Expired - Lifetime
  • 2001-04-05 WO PCT/DE2001/001337 patent/WO2001080267A1/fr active IP Right Grant
  • 2001-04-05 EP EP01931414A patent/EP1273021B1/fr not_active Expired - Lifetime
  • 2001-04-05 US US10/257,447 patent/US6769938B2/en not_active Expired - Fee Related
  • 2001-04-05 AT AT01931414T patent/ATE352856T1/de not_active IP Right Cessation
  • 2001-04-05 DE DE50111958T patent/DE50111958D1/de not_active Expired - Lifetime

Non-Patent Citations (1)

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