CA2812963A1 - Busbar trunking unit and busbar trunking system comprising a busbar trunking unit - Google Patents
Busbar trunking unit and busbar trunking system comprising a busbar trunking unit Download PDFInfo
- Publication number
- CA2812963A1 CA2812963A1 CA2812963A CA2812963A CA2812963A1 CA 2812963 A1 CA2812963 A1 CA 2812963A1 CA 2812963 A CA2812963 A CA 2812963A CA 2812963 A CA2812963 A CA 2812963A CA 2812963 A1 CA2812963 A1 CA 2812963A1
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- Prior art keywords
- busbar
- profiled elements
- busbars
- busbar trunking
- unit
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/002—Joints between bus-bars for compensating thermal expansion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/007—Butt joining of bus-bars by means of a common bolt, e.g. splice joint
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/16—Earthing arrangements
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- Installation Of Bus-Bars (AREA)
- Distribution Board (AREA)
Abstract
The invention relates to busbar trunking unit (102; 202) for a busbar trunking system (101), comprising busbars (104; 204) which are elongated in a longitudinal direction (103; 203), are arranged flat next to one another in the busbar housing (105; 205) and are encased by a busbar housing (105; 205), each busbar (104; 204) comprising a first recess (160; 260) on a first end and a second recess (161; 261) on a second end, wherein the recesses (160, 161; 260, 261) serve in each case for receiving a bolt (152) of a single-bolt connection via which the busbars (104; 204) can be connected in an electrically conductive and mechanical manner to associated busbars of adjacent busbar trunking units of the busbar trunking system. According to the invention, the busbar housing (105; 205) comprises two lateral profiled elements (112, 122, 113, 123; 212, 213) and two covering profiled elements (111, 121; 211, 221), wherein the lateral profiled elements (112, 122, 113, 123; 212, 213) have openings (162; 262) for actuating the single-bolt terminals and wherein a first of the covering profiled elements (111; 211) protrudes the first ends of the busbars and the second of the covering profiled elements (121; 221) protrudes the second ends of the busbars (104; 204). In order to design the busbar trunking unit in a more cost-effective and secure manner, it is provided that the lateral profiled elements (112, 122, 113, 123; 212, 213) and the covering profiled elements (111, 121; 211, 221) are made of an electrically conductive material and are electrically connected to one another such that they form a current path that can be used as a PE conductor.
Description
ft Description Busbar trunking unit and busbar trunking system comprising a busbar trunking unit The invention relates to a busbar trunking unit for a busbar trunking system comprising busbars which are elongated in a longitudinal direction, are encased by a busbar housing, and are arranged flat next to one another in the busbar housing, each of the busbars having a first recess at a first end and a second recess at a second end, wherein the recesses serve in each case for receiving a bolt of a single-bolt connection via which the busbars can be connected in an electrically conductive and mechanical manner to associated busbars of adjacent busbar trunking units of the busbar trunking system, wherein the busbar housing has two lateral profiled elements and two covering profiled elements, wherein the lateral profiled elements have openings for actuating the single-bolt terminals and wherein a first of the covering profiled elements projects beyond the first ends of the busbars and the second of the covering profiled elements projects beyond the second ends of the busbars.
The invention further relates to a busbar trunking system comprising at least one busbar trunking unit of said type as part of a daisychained busbar configuration formed from busbar trunking units coupled to one another by their front face.
When a daisychained busbar configuration of an in particular air-insulated busbar trunking system is constructed by coupling preassembled generic busbar trunking units to one another by their front face, it is necessary to provide a PE
1.
The invention further relates to a busbar trunking system comprising at least one busbar trunking unit of said type as part of a daisychained busbar configuration formed from busbar trunking units coupled to one another by their front face.
When a daisychained busbar configuration of an in particular air-insulated busbar trunking system is constructed by coupling preassembled generic busbar trunking units to one another by their front face, it is necessary to provide a PE
1.
conductor. PE conductors known from practice in the prior art are formed in the case of such generic busbar trunking units in that on the one hand an extra busbar is provided which is connected to the busbar housing by way of CU straps in order to carry "single-pole short-circuit to ground (PE)" short-circuit currents in the case of faults. In this case the housing parts had to be specially prepared in order to create defined current transition points.
A generic busbar trunking unit known from practice is shown in Figures 1 and 2.
Starting from a busbar trunking unit having the features of the preamble of claim 1, the object underlying the invention is to design the busbar trunking unit in a more cost-effective, safe and reliable manner.
This object is achieved by means of a generic busbar trunking unit, wherein the lateral profiled elements and the covering profiled elements are made of current-conducting material and are connected in an electrically conductive manner in such a way that they form a current path which can be used as a PE
conductor.
Advantageous embodiments of the novel busbar trunking unit are disclosed in claims 2 to 4.
In this arrangement, in order to establish their electrically conductive connection, the two partial sheaths preferably form mutually associated electrical contact surfaces which are held under contact force directly against one another in an electrically conductive manner.
a Preferably a first of the two sections of each of the busbars is displaceable in the longitudinal direction and is held fixedly in place transversely to the longitudinal direction in a first of the two partial sheaths of the busbar trunking unit and the second of the sections of each of the busbars is displaceable in the longitudinal direction and is held fixedly in place transversely to the longitudinal direction in the second of the two partial sheaths of the busbar trunking unit, wherein the two sections on the one hand and the two partial sheaths on the other hand are in each case captively connected to one another.
First fixing means are preferably provided for mutual fixing of the two partial sheaths of the busbar housing, which fixing means engage through slotted holes of the first of the two partial sheaths and associated fixing holes of the second of the two partial sheaths.
A further preferred embodiment of the novel busbar trunking unit provides that in order to establish the current-conducting connection the sections overlap at their front faces facing toward one another, wherein a second fixing means can be provided for mutual fixing of the sections, which fixing means engages through mutually associated slotted holes of the busbars in the overlap zone, as is already known from busbars which serve for driving rail vehicles (US 5,224,575 A, DE 196 09 006 C2).
In order to facilitate the assembly and installation of the busbar trunking unitand the adjustment of the length of the busbar housing it is furthermore advantageously provided to furnish each of the two partial sheaths with handles.
The invention is described hereinbelow with reference to the following figures, in which:
Figures 1 and 2 show a busbar trunking system known from practice comprising a busbar trunking unit in the form of an expansion unit, Figure 3 shows a busbar trunking system comprising a busbar trunking unit according to the invention in a perspective view with busbar and busbar housing, Figures 4, 11 and 12 show three different sectional views of the busbar trunking unit according to Figure 3, Figures 5 to 9 show individual parts of the busbar housing, Figure 10 shows two sections of one of the busbars with connecting means in an exploded view, and Figures 13 to 15 show the busbar trunking unit partially in an exploded view, with the busbars and the busbar housing being independently adjusted to different lengths in each case.
ft Figures 1 and 2 show a busbar trunking system 1 known from practice comprising a busbar trunking unit 2 in the form of an expansion unit which is part of a busbar daisychain of the busbar trunking system. In a longitudinal direction 3, the expansion unit 2 has elongated busbars 4 which are encased by a busbar housing 5 and are arranged flat next to one another in the busbar housing 5. With said known busbar trunking unit, each of the busbars 4 consists of two separate sections 4a, 4b which are embodied as rigid profiled elements and are connected to one another in series in an electrically conductive manner in the longitudinal direction 3, wherein the sections 4a, 4b can be displaced independently of one another in the busbar housing 5 in the longitudinal direction and are held fixedly in place transversely to the longitudinal direction 3. Supporting and retaining devices 7, as already known from the publication EP 0 530 521 Bl, serve for that purpose.
The two sections 4a, 4b of each of the busbars 4 are in each case connected to one another in an electrically conductive manner by means of a flexible conductor strip 6, the two ends of the conductor strip being welded to the front faces of the two sections 4a, 4b facing toward one another.
Figures 3 and 4 show a busbar trunking system 101 according to the invention comprising a busbar trunking unit 102 according to the invention. The busbar trunking unit 102 according to the invention also has busbars 104 which are elongated in a longitudinal direction 103, form a conductor rail pack and are arranged, enclosed by a busbar housing 105, flat next to one another in the busbar housing 105. Furthermore, in this case too, each of the busbars 104 consists of two separate sections 104a, 104b which are embodied as rigid profiled elements and are connected to one another in series in an electrically conductive manner in the longitudinal direction 103. Here too, the sections 104a, 104b can be displaced independently of one another in the busbar housing 105 in the longitudinal direction 103 and are held fixedly in place transversely to the longitudinal direction 103 by means of supporting and retaining devices 107 in the manner known from the publication EP 0 530 521 Bl. The two sections are - as will be shown hereinafter - connected to one another in a captive but releasable manner.
The busbar housing 105 consists of two partial sheaths 105a and 105b, which engage in one another in a telescope-like manner and which are slidable, telescope-like, into one another continuously to different depths in order to change the length of the busbar housing 105.
In this case a first 105a of the two partial sheaths is formed by nine housing parts 111 to 119. The second partial sheath is formed by five housing parts 121 to 125. Several of the housing parts in each case are common parts which are shown again individually in Figures 5 to 9.
Thus, the housing parts designated by 111 and 121 in Figures 3 and 4 are embodied according to Figure 5 as first covering profiled elements 130 bent into a U shape, each forming an end-side flange. Each of said end-side flanges serves to connect to a further busbar trunking unit of the busbar daisychain and for this purpose has first fixing holes 131.
According to Figure 6, the housing parts designated by 112, 113, 122 and 123 in Figures 3 and 4 are first lateral profiled elements 132 bent into a W shape. These have second fixing holes 133 for connecting to a further busbar trunking unit of the busbar daisychain, as well as third 134 and fourth 135 fixing holes.
According to Figure 7, the housing parts designated by 114, 115, 124 and 125 in Figures 3 and 4 are flat ventilation grilles 136 having fifth fixing holes 137. In this case the fourth 135 and fifth 137 fixing holes serve for connecting the first lateral profiled elements 132 to the ventilation grilles 136.
The housing parts designated by 116 and 117 and 118 and 119 in Figures 3 and 4 form a further flange overlapping and connecting the ventilation grilles and the first lateral profiled elements and fulfilling the function of guiding the second partial sheath 105b in the first partial sheath 105a in a telescope-like manner. For this purpose the housing parts 116 and 117, which according to Figure 8 form W-shaped second lateral profiled elements 138, and the housing parts 118 and 119, which according to Figure 9 form U-shaped second covering profiled elements 141, each have slotted holes 140 and 143 respectively on opposite sides, in which holes, according to Figure 3, first fixing means 150 in the form of fixing screws are guided. The two partial sheaths 105a, 105b are captively connected to one another by means of the fixing screws, because said fixing means engage through the slotted holes 140, 143 of the first of the two partial sheaths 105a and the associated fixing holes 134 of the second 105b of the two partial sheaths.
The two partial sheaths 105a, 105b are each made of a current-conducting material - in particular galvanized steel or aluminum - and are connected to one another in an electrically conductive manner in such a way that they form a current path which can be used as a PE conductor. In order to establish the electrically conductive connection the two partial sheaths 105a, 105b in this case form contact pairs composed of mutually associated electrical contact surfaces which are held under contact force directly against one another in an electrically conductive manner.
In this arrangement said contact surfaces are embodied on the U-shaped first covering profiled elements 130, the W-shaped first lateral profiled elements 132, the W-shaped second lateral profiled elements 138 and the U-shaped second covering profiled elements 141 in the manner shown in Figures 5 and 6 and 8 and 9.
Thus, according to Figure 5, the inward-facing surfaces of the first covering profiled elements 130 provided with the fixing holes 131 form the first 130a and 130b of the contact surfaces, and, according to Figure 9, the inward-facing surfaces of the second covering profiled elements 141 provided with the fixing holes 142 and the slotted holes 143 form the second 141a and 141b of the contact surfaces. For this purpose the said surfaces forming the first and second of the contact surfaces are kept metallically bare, while the remaining surfaces of the covering profiled elements 130 and 141 formed from current-conducting material - in particular made of galvanized steel or aluminum - are additionally provided with a color coating.
Furthermore, according to Figure 6, sections of the outward-facing surfaces of the first lateral profiled elements 132 provided with the fixing holes 133 and 134 form the third 132a to 132d of the contact surfaces. In addition, according to Figure 8, the sides of the second lateral profiled elements 138 provided with the fixing holes 139 and the slotted holes 140 form the fourth 138a to 138d of the contact surfaces with their inward- and outward-facing surfaces. In this case too the said surfaces forming the third and fourth of the contact surfaces are kept metallically bare, while the remaining surfaces of the lateral profiled elements 132 and 138 formed from current-conducting material - in particular made of galvanized steel or aluminum - are additionally provided with a color coating.
Thus, the housing parts 122 and 116 and 123 and 117 are metallically bare in overlapping areas and are connected in an electrically conductive manner via contact pairs accordingly formed from the contact surfaces 132a, 132b, 138a and 138b.
In addition, however, the housing parts 116, 118; 116, 119;
117, 118; 117, 119 are also metallically bare in their overlapping area and are connected in an electrically conductive manner via contact pairs accordingly formed from the contact surfaces 138c, 138d, 141a and 141b.
Furthermore, the housing parts 112 and 116 and 113 and 117 are metallically bare in overlapping areas and are connected in an electrically conductive manner via contact pairs accordingly formed from the contact surfaces 132a, 132b, 138a and 138b.
The fixing means (in this case screwed connections) designated by 150 serve to press the mutually associated surfaces of the bare contact surfaces 130a, 130b, 132a to 132d, 138a to 138d and 141, 142 onto one another and to establish a conductive connection capable of carrying current.
The conductive connection is implemented in such a way that short-circuit currents in the fault situation "single-pole short-circuit to ground (PE)" can also be conducted by the busbar housing 105. Toward that end the contact surfaces are dimensioned large enough that even at the maximum length of the busbar housing 105 the contact surfaces of each of the housing part pairs resulting due to the electrical connection of the individual housing parts in total form an overlap in each case of at least 450mm2 per kA short-circuit current. The busbar housing 105 can therefore be used as a PE conductor.
According to Figure 10, the section 104b of the busbars is stepped at its end facing toward the section 104a and the two sections are arranged overlapping at their front faces facing toward one another in order to establish a current-conducting connection.
According to Figure 11, two of the supporting and retaining devices 107 which carry the first sections 104a of the busbars are in each case braced against the W-shaped first lateral profiled elements 132 of the first partial sheath 105a. Two more of the supporting and retaining devices 107 which carry the second sections of the busbars are in each case braced against the W-shaped first lateral profiled elements 132 of the second partial sheath 105b. In this way the first 104a of the two sections of each of the busbars can be displaced in the longitudinal direction 103 and is held fixedly in place transversely to the longitudinal direction in the first 105a of the two partial sheaths of the busbar trunking unit and the second 104b of the sections of each of the busbars can be displaced in the longitudinal direction 103 and is held fixedly in place transversely to the longitudinal direction in the second 105b of the two partial sheaths of the busbar trunking unit.
According to Figure 11, a second fixing means 151 in the form of a single bolt connection known from the publication DE 42 25 837 C2 is provided for the mutual fixing of the sections 104a and 104b, a bolt 152 of said single bolt connection engaging through mutually associated slotted holes 153, 154 of the sections 104a, 104b in the overlap zone. The busbar housing 105 and the conductor rail pack formed from the busbars 104 are simultaneously connected captively to one another mechanically by means of said single bolt connection.
According to Figures 13 to 15, in the busbar trunking unit according to the invention the length Li of the busbars 104 formed from the sections 104a and 104b (the length Li of the conductor rail pack) and the length L2 of the busbar housing 105 formed from the partial sheaths 105a and 105b are freely (continuously) adjustable independently of one another over a large length range in each case (of in particular up to 60mm in each case). Accordingly, Figure 13 shows the busbar trunking unit in a first end position in which both the length Li of the busbars 104 and the length L2 of the busbar housing 105 are set to their shortest value. Figure 14 shows a middle position in which the lengths Li and L2 are set to intermediate values, and Figure 15 shows a second end position *
in which both the length Li of the busbars 104 and the length L2 of the busbar housing 105 are set to their longest value.
By means of the busbar trunking unit 102 according to the invention it is possible to compensate for tolerances occurring at the installation site during the assembly and installation of a daisychained busbar configuration of a busbar trunking system in a simple, time- and cost-saving manner. Assembly and manufacturing tolerances as well as preliminary configuration inaccuracies can be compensated for by simple on-site assembly and installation of the busbar trunking unit according to the invention. Time-consuming retrofitting of adapter pieces - as was previously required in practice - is no longer necessary. At the same time the technical features of the busbar trunking system in terms of current-carrying capacity, short-circuit resistance, PE
connection, IP protection class, or the freedom of movement of the conductor rail pack with respect to the busbar housing in the event of linear thermal expansion are advantageously maintained. It is also important that the external contours of the adjustable busbar trunking unit 102 according to the invention are very similar to the external contours of the rest of the busbar daisychain and therefore can be integrated visually into the busbar trunking system in an optimum manner.
Special planning rules for the configuration of the busbar trunking system are not to be taken into account in this case.
To facilitate installation of the busbar trunking unit 102 in the busbar daisychain of the busbar trunking system 101 and to adjust the length of the busbar housing 105, the two partial sheaths 105a and 105b are each provided with two handles 155.
Figures 16 and 17 show a further busbar trunking unit 202 of the busbar trunking system 101 having busbars 204 which are elongated in a longitudinal direction 203, are encased by a busbar housing 205, and are arranged flat next to one another in the busbar housing 205. Each of the busbars 204 has a first recess 260 at a first end and a second recess 261 at a second end, each of the recesses 260, 261 serving for receiving a bolt 152 of a single-bolt connection via which the busbars 204 can be connected in an electrically conductive and mechanical manner to associated busbars of adjacent busbar trunking units of the busbar trunking system.
The busbar housing 205 has two lateral profiled elements 212, 213 and two covering profiled elements 211, 221, the lateral profiled elements 212, 213 having openings 162; 262 for actuating the single-bolt terminals and a first of the covering profiled elements 211 projecting beyond the first ends of the busbars and the second of the covering profiled elements 221 projecting beyond the second ends of the busbars 204.
The lateral profiled elements 212, 213 and the covering profiled elements 211, 221 are made of current-conducting material and are connected in an electrically conductive manner in such a way that they form a current path which can be used as a PE conductor.
In order to establish their electrical connection the lateral profiled elements 212, 213 and the covering profiled elements 211, 221 form mutually associated electrical contact surfaces which are held under contact force directly against one another in an electrically conductive manner. Accordingly, the covering profiled elements 211 and 221 are provided with contact surfaces 211a, 211b and 221a, 221b respectively on their inward-facing sides in the same way as the covering profiled elements 130 and the lateral profiled elements 212, 213 are provided with contact surfaces 212a, 212b and 213a, 213b respectively in the same way as the lateral profiled elements 132.
One 221 of the covering profiled elements is connected to the lateral profiled elements 212, 213 by means of rivet nuts 263.
With their internal thread, said rivet nuts 263 form fixing means which serve for mounting the busbar trunking unit to associated support elements.
In this case too the conductive connection is implemented in such a way that short-circuit currents in the fault situation "single-pole short-circuit to ground (PE)" can also be conducted by the busbar housing 205. Toward that end, the contact surfaces are dimensioned large enough in this case too that even at the maximum length of the busbar housing 205 the contact surfaces of each of the housing part pairs resulting due to the electrical connection of the individual housing parts in total form an overlap in each case of at least 450=2 per kA short-circuit current. Accordingly, the busbar housing 205 can likewise be used as a PE conductor.
In the illustrated busbar trunking units 102; 202 according to the invention, a PE connection is therefore realized by way of the existing housing parts. Consequently, a PE conductor embodied as a separate rail, an additional connecting strap for connecting the separate rail to the busbar housing, and a special preparation of the housing parts are no longer necessary. Overall, therefore, the busbar trunking units according to the invention are cheaper and easier to assemble and install. The covering profiled elements (111, 121; 211, 221) establish both the mechanical and the electrical connection (PE) to the lateral profiled elements (112, 122, 113, 123; 212, 213).
Using only three busbars for the external conductors it is possible to realize busbar trunking systems for IT networks (L1, L2, L3, PE) or TN-S networks without N (L1, L2, L3, PE).
It is furthermore possible, using only four busbars for the external conductors and the neutral conductor, to realize busbar trunking systems for TN-S networks (L1, L2, L3, N, PE) and TT networks with protective grounding conductor (L1, L2, L3, N, PE).
By introducing rivet nuts it is no longer necessary to provide additional fixing elements. Moreover, the covering profiled element 221 and the lateral profiled elements 212, 213 are captively connected to one another by means of the rivet nuts 263. This increases ease of assembly and installation.
The functions of the mechanical and electrical connection of the lateral profiled elements 112, 122, 113, 123; 212, 213 to the covering profiled elements 111, 121; 211, 221 are combined according to the invention, with the result that not only is assembly/installation simplified, but safety is also increased, for the otherwise usual additional electrical connection cannot be forgotten here. The large overlaps of the contact surfaces associated with one another ensure a long-term stable electrical connection.
A generic busbar trunking unit known from practice is shown in Figures 1 and 2.
Starting from a busbar trunking unit having the features of the preamble of claim 1, the object underlying the invention is to design the busbar trunking unit in a more cost-effective, safe and reliable manner.
This object is achieved by means of a generic busbar trunking unit, wherein the lateral profiled elements and the covering profiled elements are made of current-conducting material and are connected in an electrically conductive manner in such a way that they form a current path which can be used as a PE
conductor.
Advantageous embodiments of the novel busbar trunking unit are disclosed in claims 2 to 4.
In this arrangement, in order to establish their electrically conductive connection, the two partial sheaths preferably form mutually associated electrical contact surfaces which are held under contact force directly against one another in an electrically conductive manner.
a Preferably a first of the two sections of each of the busbars is displaceable in the longitudinal direction and is held fixedly in place transversely to the longitudinal direction in a first of the two partial sheaths of the busbar trunking unit and the second of the sections of each of the busbars is displaceable in the longitudinal direction and is held fixedly in place transversely to the longitudinal direction in the second of the two partial sheaths of the busbar trunking unit, wherein the two sections on the one hand and the two partial sheaths on the other hand are in each case captively connected to one another.
First fixing means are preferably provided for mutual fixing of the two partial sheaths of the busbar housing, which fixing means engage through slotted holes of the first of the two partial sheaths and associated fixing holes of the second of the two partial sheaths.
A further preferred embodiment of the novel busbar trunking unit provides that in order to establish the current-conducting connection the sections overlap at their front faces facing toward one another, wherein a second fixing means can be provided for mutual fixing of the sections, which fixing means engages through mutually associated slotted holes of the busbars in the overlap zone, as is already known from busbars which serve for driving rail vehicles (US 5,224,575 A, DE 196 09 006 C2).
In order to facilitate the assembly and installation of the busbar trunking unitand the adjustment of the length of the busbar housing it is furthermore advantageously provided to furnish each of the two partial sheaths with handles.
The invention is described hereinbelow with reference to the following figures, in which:
Figures 1 and 2 show a busbar trunking system known from practice comprising a busbar trunking unit in the form of an expansion unit, Figure 3 shows a busbar trunking system comprising a busbar trunking unit according to the invention in a perspective view with busbar and busbar housing, Figures 4, 11 and 12 show three different sectional views of the busbar trunking unit according to Figure 3, Figures 5 to 9 show individual parts of the busbar housing, Figure 10 shows two sections of one of the busbars with connecting means in an exploded view, and Figures 13 to 15 show the busbar trunking unit partially in an exploded view, with the busbars and the busbar housing being independently adjusted to different lengths in each case.
ft Figures 1 and 2 show a busbar trunking system 1 known from practice comprising a busbar trunking unit 2 in the form of an expansion unit which is part of a busbar daisychain of the busbar trunking system. In a longitudinal direction 3, the expansion unit 2 has elongated busbars 4 which are encased by a busbar housing 5 and are arranged flat next to one another in the busbar housing 5. With said known busbar trunking unit, each of the busbars 4 consists of two separate sections 4a, 4b which are embodied as rigid profiled elements and are connected to one another in series in an electrically conductive manner in the longitudinal direction 3, wherein the sections 4a, 4b can be displaced independently of one another in the busbar housing 5 in the longitudinal direction and are held fixedly in place transversely to the longitudinal direction 3. Supporting and retaining devices 7, as already known from the publication EP 0 530 521 Bl, serve for that purpose.
The two sections 4a, 4b of each of the busbars 4 are in each case connected to one another in an electrically conductive manner by means of a flexible conductor strip 6, the two ends of the conductor strip being welded to the front faces of the two sections 4a, 4b facing toward one another.
Figures 3 and 4 show a busbar trunking system 101 according to the invention comprising a busbar trunking unit 102 according to the invention. The busbar trunking unit 102 according to the invention also has busbars 104 which are elongated in a longitudinal direction 103, form a conductor rail pack and are arranged, enclosed by a busbar housing 105, flat next to one another in the busbar housing 105. Furthermore, in this case too, each of the busbars 104 consists of two separate sections 104a, 104b which are embodied as rigid profiled elements and are connected to one another in series in an electrically conductive manner in the longitudinal direction 103. Here too, the sections 104a, 104b can be displaced independently of one another in the busbar housing 105 in the longitudinal direction 103 and are held fixedly in place transversely to the longitudinal direction 103 by means of supporting and retaining devices 107 in the manner known from the publication EP 0 530 521 Bl. The two sections are - as will be shown hereinafter - connected to one another in a captive but releasable manner.
The busbar housing 105 consists of two partial sheaths 105a and 105b, which engage in one another in a telescope-like manner and which are slidable, telescope-like, into one another continuously to different depths in order to change the length of the busbar housing 105.
In this case a first 105a of the two partial sheaths is formed by nine housing parts 111 to 119. The second partial sheath is formed by five housing parts 121 to 125. Several of the housing parts in each case are common parts which are shown again individually in Figures 5 to 9.
Thus, the housing parts designated by 111 and 121 in Figures 3 and 4 are embodied according to Figure 5 as first covering profiled elements 130 bent into a U shape, each forming an end-side flange. Each of said end-side flanges serves to connect to a further busbar trunking unit of the busbar daisychain and for this purpose has first fixing holes 131.
According to Figure 6, the housing parts designated by 112, 113, 122 and 123 in Figures 3 and 4 are first lateral profiled elements 132 bent into a W shape. These have second fixing holes 133 for connecting to a further busbar trunking unit of the busbar daisychain, as well as third 134 and fourth 135 fixing holes.
According to Figure 7, the housing parts designated by 114, 115, 124 and 125 in Figures 3 and 4 are flat ventilation grilles 136 having fifth fixing holes 137. In this case the fourth 135 and fifth 137 fixing holes serve for connecting the first lateral profiled elements 132 to the ventilation grilles 136.
The housing parts designated by 116 and 117 and 118 and 119 in Figures 3 and 4 form a further flange overlapping and connecting the ventilation grilles and the first lateral profiled elements and fulfilling the function of guiding the second partial sheath 105b in the first partial sheath 105a in a telescope-like manner. For this purpose the housing parts 116 and 117, which according to Figure 8 form W-shaped second lateral profiled elements 138, and the housing parts 118 and 119, which according to Figure 9 form U-shaped second covering profiled elements 141, each have slotted holes 140 and 143 respectively on opposite sides, in which holes, according to Figure 3, first fixing means 150 in the form of fixing screws are guided. The two partial sheaths 105a, 105b are captively connected to one another by means of the fixing screws, because said fixing means engage through the slotted holes 140, 143 of the first of the two partial sheaths 105a and the associated fixing holes 134 of the second 105b of the two partial sheaths.
The two partial sheaths 105a, 105b are each made of a current-conducting material - in particular galvanized steel or aluminum - and are connected to one another in an electrically conductive manner in such a way that they form a current path which can be used as a PE conductor. In order to establish the electrically conductive connection the two partial sheaths 105a, 105b in this case form contact pairs composed of mutually associated electrical contact surfaces which are held under contact force directly against one another in an electrically conductive manner.
In this arrangement said contact surfaces are embodied on the U-shaped first covering profiled elements 130, the W-shaped first lateral profiled elements 132, the W-shaped second lateral profiled elements 138 and the U-shaped second covering profiled elements 141 in the manner shown in Figures 5 and 6 and 8 and 9.
Thus, according to Figure 5, the inward-facing surfaces of the first covering profiled elements 130 provided with the fixing holes 131 form the first 130a and 130b of the contact surfaces, and, according to Figure 9, the inward-facing surfaces of the second covering profiled elements 141 provided with the fixing holes 142 and the slotted holes 143 form the second 141a and 141b of the contact surfaces. For this purpose the said surfaces forming the first and second of the contact surfaces are kept metallically bare, while the remaining surfaces of the covering profiled elements 130 and 141 formed from current-conducting material - in particular made of galvanized steel or aluminum - are additionally provided with a color coating.
Furthermore, according to Figure 6, sections of the outward-facing surfaces of the first lateral profiled elements 132 provided with the fixing holes 133 and 134 form the third 132a to 132d of the contact surfaces. In addition, according to Figure 8, the sides of the second lateral profiled elements 138 provided with the fixing holes 139 and the slotted holes 140 form the fourth 138a to 138d of the contact surfaces with their inward- and outward-facing surfaces. In this case too the said surfaces forming the third and fourth of the contact surfaces are kept metallically bare, while the remaining surfaces of the lateral profiled elements 132 and 138 formed from current-conducting material - in particular made of galvanized steel or aluminum - are additionally provided with a color coating.
Thus, the housing parts 122 and 116 and 123 and 117 are metallically bare in overlapping areas and are connected in an electrically conductive manner via contact pairs accordingly formed from the contact surfaces 132a, 132b, 138a and 138b.
In addition, however, the housing parts 116, 118; 116, 119;
117, 118; 117, 119 are also metallically bare in their overlapping area and are connected in an electrically conductive manner via contact pairs accordingly formed from the contact surfaces 138c, 138d, 141a and 141b.
Furthermore, the housing parts 112 and 116 and 113 and 117 are metallically bare in overlapping areas and are connected in an electrically conductive manner via contact pairs accordingly formed from the contact surfaces 132a, 132b, 138a and 138b.
The fixing means (in this case screwed connections) designated by 150 serve to press the mutually associated surfaces of the bare contact surfaces 130a, 130b, 132a to 132d, 138a to 138d and 141, 142 onto one another and to establish a conductive connection capable of carrying current.
The conductive connection is implemented in such a way that short-circuit currents in the fault situation "single-pole short-circuit to ground (PE)" can also be conducted by the busbar housing 105. Toward that end the contact surfaces are dimensioned large enough that even at the maximum length of the busbar housing 105 the contact surfaces of each of the housing part pairs resulting due to the electrical connection of the individual housing parts in total form an overlap in each case of at least 450mm2 per kA short-circuit current. The busbar housing 105 can therefore be used as a PE conductor.
According to Figure 10, the section 104b of the busbars is stepped at its end facing toward the section 104a and the two sections are arranged overlapping at their front faces facing toward one another in order to establish a current-conducting connection.
According to Figure 11, two of the supporting and retaining devices 107 which carry the first sections 104a of the busbars are in each case braced against the W-shaped first lateral profiled elements 132 of the first partial sheath 105a. Two more of the supporting and retaining devices 107 which carry the second sections of the busbars are in each case braced against the W-shaped first lateral profiled elements 132 of the second partial sheath 105b. In this way the first 104a of the two sections of each of the busbars can be displaced in the longitudinal direction 103 and is held fixedly in place transversely to the longitudinal direction in the first 105a of the two partial sheaths of the busbar trunking unit and the second 104b of the sections of each of the busbars can be displaced in the longitudinal direction 103 and is held fixedly in place transversely to the longitudinal direction in the second 105b of the two partial sheaths of the busbar trunking unit.
According to Figure 11, a second fixing means 151 in the form of a single bolt connection known from the publication DE 42 25 837 C2 is provided for the mutual fixing of the sections 104a and 104b, a bolt 152 of said single bolt connection engaging through mutually associated slotted holes 153, 154 of the sections 104a, 104b in the overlap zone. The busbar housing 105 and the conductor rail pack formed from the busbars 104 are simultaneously connected captively to one another mechanically by means of said single bolt connection.
According to Figures 13 to 15, in the busbar trunking unit according to the invention the length Li of the busbars 104 formed from the sections 104a and 104b (the length Li of the conductor rail pack) and the length L2 of the busbar housing 105 formed from the partial sheaths 105a and 105b are freely (continuously) adjustable independently of one another over a large length range in each case (of in particular up to 60mm in each case). Accordingly, Figure 13 shows the busbar trunking unit in a first end position in which both the length Li of the busbars 104 and the length L2 of the busbar housing 105 are set to their shortest value. Figure 14 shows a middle position in which the lengths Li and L2 are set to intermediate values, and Figure 15 shows a second end position *
in which both the length Li of the busbars 104 and the length L2 of the busbar housing 105 are set to their longest value.
By means of the busbar trunking unit 102 according to the invention it is possible to compensate for tolerances occurring at the installation site during the assembly and installation of a daisychained busbar configuration of a busbar trunking system in a simple, time- and cost-saving manner. Assembly and manufacturing tolerances as well as preliminary configuration inaccuracies can be compensated for by simple on-site assembly and installation of the busbar trunking unit according to the invention. Time-consuming retrofitting of adapter pieces - as was previously required in practice - is no longer necessary. At the same time the technical features of the busbar trunking system in terms of current-carrying capacity, short-circuit resistance, PE
connection, IP protection class, or the freedom of movement of the conductor rail pack with respect to the busbar housing in the event of linear thermal expansion are advantageously maintained. It is also important that the external contours of the adjustable busbar trunking unit 102 according to the invention are very similar to the external contours of the rest of the busbar daisychain and therefore can be integrated visually into the busbar trunking system in an optimum manner.
Special planning rules for the configuration of the busbar trunking system are not to be taken into account in this case.
To facilitate installation of the busbar trunking unit 102 in the busbar daisychain of the busbar trunking system 101 and to adjust the length of the busbar housing 105, the two partial sheaths 105a and 105b are each provided with two handles 155.
Figures 16 and 17 show a further busbar trunking unit 202 of the busbar trunking system 101 having busbars 204 which are elongated in a longitudinal direction 203, are encased by a busbar housing 205, and are arranged flat next to one another in the busbar housing 205. Each of the busbars 204 has a first recess 260 at a first end and a second recess 261 at a second end, each of the recesses 260, 261 serving for receiving a bolt 152 of a single-bolt connection via which the busbars 204 can be connected in an electrically conductive and mechanical manner to associated busbars of adjacent busbar trunking units of the busbar trunking system.
The busbar housing 205 has two lateral profiled elements 212, 213 and two covering profiled elements 211, 221, the lateral profiled elements 212, 213 having openings 162; 262 for actuating the single-bolt terminals and a first of the covering profiled elements 211 projecting beyond the first ends of the busbars and the second of the covering profiled elements 221 projecting beyond the second ends of the busbars 204.
The lateral profiled elements 212, 213 and the covering profiled elements 211, 221 are made of current-conducting material and are connected in an electrically conductive manner in such a way that they form a current path which can be used as a PE conductor.
In order to establish their electrical connection the lateral profiled elements 212, 213 and the covering profiled elements 211, 221 form mutually associated electrical contact surfaces which are held under contact force directly against one another in an electrically conductive manner. Accordingly, the covering profiled elements 211 and 221 are provided with contact surfaces 211a, 211b and 221a, 221b respectively on their inward-facing sides in the same way as the covering profiled elements 130 and the lateral profiled elements 212, 213 are provided with contact surfaces 212a, 212b and 213a, 213b respectively in the same way as the lateral profiled elements 132.
One 221 of the covering profiled elements is connected to the lateral profiled elements 212, 213 by means of rivet nuts 263.
With their internal thread, said rivet nuts 263 form fixing means which serve for mounting the busbar trunking unit to associated support elements.
In this case too the conductive connection is implemented in such a way that short-circuit currents in the fault situation "single-pole short-circuit to ground (PE)" can also be conducted by the busbar housing 205. Toward that end, the contact surfaces are dimensioned large enough in this case too that even at the maximum length of the busbar housing 205 the contact surfaces of each of the housing part pairs resulting due to the electrical connection of the individual housing parts in total form an overlap in each case of at least 450=2 per kA short-circuit current. Accordingly, the busbar housing 205 can likewise be used as a PE conductor.
In the illustrated busbar trunking units 102; 202 according to the invention, a PE connection is therefore realized by way of the existing housing parts. Consequently, a PE conductor embodied as a separate rail, an additional connecting strap for connecting the separate rail to the busbar housing, and a special preparation of the housing parts are no longer necessary. Overall, therefore, the busbar trunking units according to the invention are cheaper and easier to assemble and install. The covering profiled elements (111, 121; 211, 221) establish both the mechanical and the electrical connection (PE) to the lateral profiled elements (112, 122, 113, 123; 212, 213).
Using only three busbars for the external conductors it is possible to realize busbar trunking systems for IT networks (L1, L2, L3, PE) or TN-S networks without N (L1, L2, L3, PE).
It is furthermore possible, using only four busbars for the external conductors and the neutral conductor, to realize busbar trunking systems for TN-S networks (L1, L2, L3, N, PE) and TT networks with protective grounding conductor (L1, L2, L3, N, PE).
By introducing rivet nuts it is no longer necessary to provide additional fixing elements. Moreover, the covering profiled element 221 and the lateral profiled elements 212, 213 are captively connected to one another by means of the rivet nuts 263. This increases ease of assembly and installation.
The functions of the mechanical and electrical connection of the lateral profiled elements 112, 122, 113, 123; 212, 213 to the covering profiled elements 111, 121; 211, 221 are combined according to the invention, with the result that not only is assembly/installation simplified, but safety is also increased, for the otherwise usual additional electrical connection cannot be forgotten here. The large overlaps of the contact surfaces associated with one another ensure a long-term stable electrical connection.
Claims (5)
1. A busbar trunking unit (102; 202) for a busbar trunking system (101) comprising busbars (104; 204) which are elongated in a longitudinal direction (103; 203), are encased by a busbar housing (105; 205), and are arranged flat next to one another in the busbar housing (105; 205), wherein each of the busbars (104; 204) has a first recess (160; 260) at a first end and a second recess (161; 261) at a second end, the recesses (160, 161; 260, 261) serving in each case for receiving a bolt (152) of a single-bolt connection via which the busbars (104; 204) can be connected in an electrically conductive and mechanical manner to associated busbars of adjacent busbar trunking units of the busbar trunking system, wherein the busbar housing (105; 205) has two lateral profiled elements (112, 122, 113, 123; 212, 213) and two covering profiled elements (111, 121; 211, 221), the lateral profiled elements (112, 122, 113, 123; 212, 213) having openings (162; 262) for actuating the single-bolt terminals and a first of the covering profiled elements (111; 211) projecting beyond the first ends of the busbars and the second of the covering profiled elements (121; 221) projecting beyond the second ends of the busbars (104;
204), characterized in that the lateral profiled elements (112, 122, 113, 123; 212, 213) and the covering profiled elements (111, 121; 211, 221) are made of current-conducting material and are connected in an electrically conductive manner in such a way that they form a current path which can be used as a PE
conductor.
204), characterized in that the lateral profiled elements (112, 122, 113, 123; 212, 213) and the covering profiled elements (111, 121; 211, 221) are made of current-conducting material and are connected in an electrically conductive manner in such a way that they form a current path which can be used as a PE
conductor.
2. The busbar trunking unit (102; 202) as claimed in claim 1, characterized in that in order to establish their electrical connection the lateral profiled elements (112, 122, 113, 123; 212, 213) and the covering profiled elements (111, 121; 211, 221) form mutually associated electrical contact surfaces which are held under contact force directly against one another in an electrically conductive manner.
3. The busbar trunking unit (202) as claimed in one of claims 1 or 2, characterized in that one (221) of the covering profiled elements is connected to the lateral profiled elements (212, 213) by means of rivet nuts (263).
4. The busbar trunking unit (202) as claimed in claim 3, characterized in that the rivet nuts (263) form fixing means which serve for mounting the busbar trunking unit to associated support elements.
5. A busbar trunking system (101) comprising busbar trunking units (102; 202) which are coupled to one another by their front face in order to form a busbar daisychain, characterized in that at least one (102; 202) of the busbar trunking units is embodied as claimed in one of claims 1 to 4.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010045946A DE102010045946A1 (en) | 2010-09-21 | 2010-09-21 | Rail box and busbar trunking system with a rail box |
| DE102010045946.1 | 2010-09-21 | ||
| PCT/EP2011/064312 WO2012038167A1 (en) | 2010-09-21 | 2011-08-19 | Busbar trunking unit and busbar trunking system comprising a busbar trunking unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2812963A1 true CA2812963A1 (en) | 2012-03-29 |
Family
ID=44534393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2812963A Abandoned CA2812963A1 (en) | 2010-09-21 | 2011-08-19 | Busbar trunking unit and busbar trunking system comprising a busbar trunking unit |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2593998B1 (en) |
| CN (1) | CN203481745U (en) |
| CA (1) | CA2812963A1 (en) |
| DE (1) | DE102010045946A1 (en) |
| WO (1) | WO2012038167A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013218508A1 (en) * | 2013-09-16 | 2015-03-19 | Siemens Aktiengesellschaft | Device for connecting a first busbar to a second busbar |
| CN104269780B (en) * | 2014-09-11 | 2018-04-20 | 安徽宏源电力建设投资有限公司 | A kind of adjustable-type cable duct construction cover board |
| US10355426B2 (en) | 2017-05-30 | 2019-07-16 | Constellation Innovation, Llc | Electrical tap box engagement system and assembly |
| EP4176500A4 (en) * | 2020-07-06 | 2024-06-05 | Starline Holdings, LLC | Systems and methods for dust and liquid protected continuous access busway trunking systems |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3571488A (en) * | 1969-04-11 | 1971-03-16 | Federal Pacific Electric Co | Enclosed bus duct |
| US3647937A (en) * | 1970-10-02 | 1972-03-07 | Square D Co | Weatherproof bus duct joint structure having selectively removable parts |
| US4213003A (en) * | 1978-02-15 | 1980-07-15 | Carlson Elmer T | Bus conduit electrical distribution system |
| DE9110388U1 (en) | 1991-08-22 | 1992-12-17 | Klöckner-Moeller GmbH, 5300 Bonn | Support and holding device for busbars in busbar distributors |
| US5224575A (en) | 1991-12-17 | 1993-07-06 | Inesscon Inc. | Power conductor rail expansion joint |
| DE4225837C2 (en) | 1992-08-05 | 2003-05-22 | Moeller Gmbh | Connecting device for busbars in low-voltage rail systems for distributing electrical energy and method for adjusting the connecting device |
| US5785542A (en) * | 1996-02-15 | 1998-07-28 | Qbc, Inc. | Electrical distribution system having an improved bus coupler |
| DE19609006C2 (en) | 1996-02-28 | 1998-07-02 | Alusuisse Lonza Services Ag | System of at least two composite profiles as busbars |
| DE69800794D1 (en) * | 1998-02-04 | 2001-06-21 | Zucchini S P A | Prefabricated part of a busbar duct |
| DE102009032619A1 (en) * | 2009-07-07 | 2011-01-13 | Siemens Aktiengesellschaft | Rail box for rail distribution system, has bus bars elongated in longitudinal direction, and rail housing having two partial coats |
-
2010
- 2010-09-21 DE DE102010045946A patent/DE102010045946A1/en not_active Withdrawn
-
2011
- 2011-08-19 CA CA2812963A patent/CA2812963A1/en not_active Abandoned
- 2011-08-19 CN CN201190000751.3U patent/CN203481745U/en not_active Expired - Fee Related
- 2011-08-19 EP EP11749799.0A patent/EP2593998B1/en not_active Not-in-force
- 2011-08-19 WO PCT/EP2011/064312 patent/WO2012038167A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN203481745U (en) | 2014-03-12 |
| DE102010045946A1 (en) | 2012-03-22 |
| EP2593998B1 (en) | 2017-11-01 |
| EP2593998A1 (en) | 2013-05-22 |
| WO2012038167A1 (en) | 2012-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20160627 |
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| FZDE | Dead |
Effective date: 20190709 |