WO2017130118A1 - Encased busbar system with an improved heat dissipation - Google Patents

Encased busbar system with an improved heat dissipation Download PDF

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Publication number
WO2017130118A1
WO2017130118A1 PCT/IB2017/050393 IB2017050393W WO2017130118A1 WO 2017130118 A1 WO2017130118 A1 WO 2017130118A1 IB 2017050393 W IB2017050393 W IB 2017050393W WO 2017130118 A1 WO2017130118 A1 WO 2017130118A1
Authority
WO
WIPO (PCT)
Prior art keywords
busbar
conductors
group
casing
busbar conductors
Prior art date
Application number
PCT/IB2017/050393
Other languages
French (fr)
Inventor
Costantino Passera
Fabrizio Fabrizi
Original Assignee
Bticino S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bticino S.P.A. filed Critical Bticino S.P.A.
Priority to RU2018130006A priority Critical patent/RU2018130006A/en
Priority to EP17710387.6A priority patent/EP3408906A1/en
Publication of WO2017130118A1 publication Critical patent/WO2017130118A1/en

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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
    • H02G5/10—Cooling
    • 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
    • H02G5/005—Laminated bus-bars
    • 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

Definitions

  • the present invention concerns a busbar.
  • the present invention relates to a thermally efficient busbar.
  • busbar conductors for power distribution is known in the art.
  • Busbars are used for power distribution in industrial or service-sector buildings, in which significant load currents are designed to be carried, e.g. from a few hundreds to a few thousands of Amperes. Such high currents require conductors with large section surfaces to decrease conductor resistance.
  • the advantage achieved by reducing conductor resistance consists in reduced voltage drop and Joule effect losses. Joule effect losses cause undesired heating of conductors, exposing conductors and structures in contact therewith to fire and damage risks. Conductor heating also causes a further increase of their electric resistance, which will worsen the above described hazards.
  • Busbars may have clamping means for holding all the busbar elements close together with an appropriate contact pressure to provide the structural rigidity required to maintain the conductors in their seats even under high forces, such as in case of short-circuit.
  • the two groups of busbar conductors are contained in an enclosure and are separated by a spacer located within the enclosure.
  • the clamping means firmly retain the busbar conductors within the enclosure.
  • busbar conductor manufacturers produce conductor segments of preset lengths, in order to provide easily handleable conductors, adapted to be installed in different types of buildings.
  • the particular bar shape allows a more efficient utilization of the conducting material in use. Furthermore, the bar shape may be efficient in dissipation of the heat generated by Joule effect. Therefore, when an electric load is applied to a busbar as described above, the temperature of the busbar considerably increases.
  • certain enclosures are known in the art to be equipped with heat dissipation elements, such as fins disposed outside the enclosure.
  • busbars have a plurality of fins on the exterior of the casing, which do not ensure efficient dissipation of the heat generated by the bars.
  • the Applicant realized that it would be desirable to provide a busbar that is more efficient in dissipating the heat generated by busbar conductors, even in the case of double busbars.
  • the object of the present invention is to provide a busbar that is more efficient in dissipating heat as compared with prior art busbars.
  • a further object of the present invention is to provide a particular structural arrangement of a single- or double-busbar that allows effective dissipation of the heat generated by Joule effect during electrical power transmission.
  • a busbar can be provided ensuring improved dissipation of the heat generated by busbar conductors within the enclosure.
  • FIG. 1 shows a perspective view of a first embodiment of a busbar of the invention
  • FIG. 2 shows a perspective view of a longitudinal section of the busbar of Figure 1;
  • FIG. 3 shows a cross-sectional view of the busbar of Figure 1;
  • FIG. 4 shows a side view of the busbar section of Figure 2;
  • FIG. 5 shows a perspective view of a second embodiment of a busbar of the invention
  • FIG. 6 shows a perspective view of a longitudinal section of the busbar of Figure 5;
  • FIG. 7 shows a cross-sectional view of the busbar of Figure 5;
  • FIG. 8 shows a side view of the busbar section of Figure 6;
  • busbar as shown in the accompanying figures shall be deemed to be schematically illustrated, not necessarily drawn to scale, and not necessarily representing the actual proportions of its parts.
  • the busbar comprises at least one group of busbar conductors 8 and an outer casing 1 containing the group of busbar conductors 8.
  • the casing 1 has vertical side walls, 2, 3 which extend longitudinally parallel to the group of busbar conductors 8 and transversely at least as far as the transverse extent of the group of busbar conductors 8.
  • the vertical side walls 2 and 3 are opposite and parallel to each other.
  • the vertical walls 2 and 3 are folded at right angles at the upper and lower ends, thereby forming a series of transverse walls 4, 5, 6 and 7.
  • each side wall 2, 3 is formed as a C-shaped plate comprising a flat base which contacts the group of busbar conductors 8 and two transverse walls 4, 5, 6 and 7 respectively projecting out of the lower and upper edges of the base away from the group of busbar conductors 8. More preferably, the two transverse walls 4, 5, 6 and 7 project out of the lower and upper edges of each base to form a right angle therewith. Therefore, each side wall has a respective lower transverse wall 4, 6 and a respective upper transverse wall 5, 7, which are both orthogonal to its flat base.
  • a group of busbar conductors is interposed between the two side walls 2 and 3 and consists, for example, of four bars made of an electrically conductive material, which are electrically insulated from each other in a conventional manner for a three-phase and neutral configuration.
  • the busbar comprises at least one element 9, 21, 22 made of a thermally conductive material interposed between and held in tight contact with at least two contiguous busbar conductors B, C of the group of busbar conductors 8.
  • Each element 9, 21, 22 extends longitudinally as far as the conductors B, C of the group of busbar conductors 8 and has two ends 10, 11, 23, 27 opposite each other transversely to the longitudinal extent of the element 9, 21, 22.
  • each element 9, 21, 22 made of a thermally conductive material is formed as a plate and extends longitudinally and transversely as far as the busbar conductors of the group of busbar conductors 8.
  • the casing 1 comprises at least one heat dissipating element 12, 13, 24, 28 connected, preferably directly connected, to a respective one of the two ends 10, 11,
  • each heat-dissipating element 12, 13, 24, 28 of the casing 1 is formed as a plate and extends longitudinally as far as the group of busbar conductors 8.
  • each heat dissipating element is formed as a plate and extends longitudinally as far as the group of busbar conductors 8.
  • each heat dissipating element 12, 13, 24, 28 of the casing 1 has folded portions 14, 15, 16, 17, 25, 26, 29, 30 at each of its two longitudinal free edges through which it is crimped to at least one of the side walls 2, 3 of the casing 1, thereby forming a right angle therewith.
  • the element 9 is metallically connected at its opposite ends 10 and 11 to respective plate-like elements 12 and 13 which extend parallel to the transverse walls 4, 5, 6 and 7 of the casing 1 of the busbar, and is crimped to such walls by folded end portions 14, 15, 16 and 17.
  • These folded portions also ensure that the side walls 1 and 2 of the casing 1 are tightly clamped against the busbar conductors and the element 9 positioned therebetween.
  • the assembly comprising the element 9 and the plate-like elements 12 and 13 metallically connected with its opposite ends 10 and 11, is embodied as a single, one-piece element. More preferably, such one-piece element comprising the assembly of the element 9 and the plate-like elements 12 and 13 is obtained by extrusion of a metal material, such as aluminum.
  • the heat generated by Joule effect within the busbar conductor is absorbed by the element 9 made of a thermally conductive material and is transferred therefrom mainly by conduction to the plate-like elements 12 and 13 which will dissipate it outside the casing 1.
  • the aforementioned element 9 made of a thermally conductive material is positioned between the phase bars B and C because this is the position with the highest heat generation by Joule effect in the busbar conductor. Nevertheless it may be also positioned at a different pair of bars as required by the construction.
  • the casing 1 comprises two heat dissipating elements 12, 13, 24, 28.
  • each heat dissipating element 12, 13, 24, 28 are crimped to two respective lower 4, 6 or upper 5, 7 transverse walls 4, 5, 6 and 7 of the two side walls 2, 3.
  • the folded portions 14, 15 of the upper dissipating element 12 are crimped to the upper transverse walls 5, 7 of the two side walls 2, 3 respectively.
  • FIG. 5 to 8 which illustrate a second embodiment of the invention
  • a first group 18 of busbar conductors and a second group 19 of busbar conductors are shown between the walls 2 and 3, these groups being vertically arranged one above the other and being vertically separated by a spacer 20.
  • the busbar comprises a spacer 20
  • the group of busbar conductors 8 comprises first 18 and second 19 groups of busbar conductors arranged vertically one above the other and separated by the spacer 20.
  • the first 18 and second 19 groups of busbar conductors, and the spacer 20 that separates them, are placed within the casing.
  • the sidewalls 2 and 3 of the casing extend parallel to the busbar conductors of each group 18 and 19 of conductors and vertically at the least to the same extent as the vertical extent of such superimposed groups with the addition of that of the spacer 20 interposed between the groups.
  • both groups of bus conductors 18, 19 are configured for a three-phase busbar in which the phases and the neutral are designated, like in the above-described embodiment, by the same letters A, B, C and N.
  • the double busbar comprises a first element 21 made of a thermally conductive material which is interposed between at least two contiguous busbar conductors of the first group 18 of busbar conductors, and a second element 22 made of a thermally conductive material which is interposed between at least two contiguous busbar conductors of the second group 19 of busbar conductors.
  • each group of conductors 18, 19 comprises an element made of a thermally conductive material 21, 22 between the phase bars B and C.
  • each element 21, 22 made of a thermally conductive material is directly connected to a respective heat dissipating element 24, 28 at one end 23, 24 that is distal to the spacer 20 located between the first 18 and second 19 groups of busbar conductors.
  • the element 21 has its end 23 distal to the spacer 20 mechanically connected to a plate-like element 24 which extends parallel to the walls 5 and 7 of the casing 1 and is crimped thereto by means of the folded end portions 25 and 26.
  • the element 21 will absorb the heat generated by Joule effect within the first group of busbar conductors 18, whereas the plate-like element 24 will dissipate it outside the casing 1.
  • the single or double busbar comprises clamping members 14, 15, 16, 17, 31 for holding the conductors of the group of busbar conductors 8, 18, 18 in clamped and side-by-side relationship within the casing 1 between the side walls 2, 3.
  • clamping means such as bolts may be used to fasten the plates 2, 3 of the casing together, e.g. at their outer lateral edges.
  • the clamping members 14, 15, 16, 17, 31 extend through the casing 1 and more preferably also through the spacer 20 to hold the conductors of the group of busbar conductors 8, 18, 19 in clamped and side- by-side relationship within the casing 1 between the side walls 2, 3.
  • the busbar conductors of the groups 18 and 19 and the plate-like elements 21 and 22 are clamped between the side walls 2 and 3 of the casing 1 also by a conventional threaded rod 31, whose head 32 engages against the plate 33, and the nut 34 engages against a second plate 35.

Landscapes

  • Installation Of Bus-Bars (AREA)
  • Connection Or Junction Boxes (AREA)

Abstract

The present invention relates to a busbar enclosed in a casing (1), for transmission of electrical power with a multiplicity of current intensity values. The busbar comprises at least one thermally conductive material (9) positioned between at least two contiguous busbar conductors (B, C), in close contact therebetween, at least one of the vertically opposite ends (10, 11) of the element being connected with a respective heat dissipating element (12, 13) of the casing (1).

Description

ENCASED BUSBAR SYSTEM WITH AN IMPROVED HEAT DISSIPATION
DESCRIPTION
FIELD OF THE INVENTION
The present invention concerns a busbar.
Particularly, the present invention relates to a thermally efficient busbar.
Discussion of the related art
The manufacturing of busbar conductors for power distribution is known in the art.
Busbars are used for power distribution in industrial or service-sector buildings, in which significant load currents are designed to be carried, e.g. from a few hundreds to a few thousands of Amperes. Such high currents require conductors with large section surfaces to decrease conductor resistance. The advantage achieved by reducing conductor resistance consists in reduced voltage drop and Joule effect losses. Joule effect losses cause undesired heating of conductors, exposing conductors and structures in contact therewith to fire and damage risks. Conductor heating also causes a further increase of their electric resistance, which will worsen the above described hazards.
Busbars may have clamping means for holding all the busbar elements close together with an appropriate contact pressure to provide the structural rigidity required to maintain the conductors in their seats even under high forces, such as in case of short-circuit.
In particular, in double busbars, the two groups of busbar conductors are contained in an enclosure and are separated by a spacer located within the enclosure. The clamping means firmly retain the busbar conductors within the enclosure.
It shall be noted that busbar conductor manufacturers produce conductor segments of preset lengths, in order to provide easily handleable conductors, adapted to be installed in different types of buildings.
As mentioned above, the particular bar shape allows a more efficient utilization of the conducting material in use. Furthermore, the bar shape may be efficient in dissipation of the heat generated by Joule effect. Therefore, when an electric load is applied to a busbar as described above, the temperature of the busbar considerably increases. In order to dissipate the heat generated by the conductors within a single busbar, certain enclosures are known in the art to be equipped with heat dissipation elements, such as fins disposed outside the enclosure.
Prior art problem
In the prior art, busbars have a plurality of fins on the exterior of the casing, which do not ensure efficient dissipation of the heat generated by the bars. In this respect, the Applicant realized that it would be desirable to provide a busbar that is more efficient in dissipating the heat generated by busbar conductors, even in the case of double busbars.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a busbar that is more efficient in dissipating heat as compared with prior art busbars.
A further object of the present invention is to provide a particular structural arrangement of a single- or double-busbar that allows effective dissipation of the heat generated by Joule effect during electrical power transmission.
The aforementioned technical purpose and objects are substantially fulfilled by a busbar that comprises the technical features as disclosed in one or more of the accompanying claims. Advantages of the invention
In one embodiment, a busbar can be provided ensuring improved dissipation of the heat generated by busbar conductors within the enclosure.
BRIEF DESCRIPTION OF THE DBA WINGS
The characteristics and advantages of the invention will appear from the following detailed description of a few preferred practical embodiments thereof, which are illustrated without limitation in the annexed drawings, in which:
- Figure 1 shows a perspective view of a first embodiment of a busbar of the invention;
- Figure 2 shows a perspective view of a longitudinal section of the busbar of Figure 1;
- Figure 3 shows a cross-sectional view of the busbar of Figure 1;
- Figure 4 shows a side view of the busbar section of Figure 2;
- Figure 5 shows a perspective view of a second embodiment of a busbar of the invention;
- Figure 6 shows a perspective view of a longitudinal section of the busbar of Figure 5;
- Figure 7 shows a cross-sectional view of the busbar of Figure 5;
- Figure 8 shows a side view of the busbar section of Figure 6;
The busbar as shown in the accompanying figures shall be deemed to be schematically illustrated, not necessarily drawn to scale, and not necessarily representing the actual proportions of its parts.
DETAILED DESCBIBTION
Even when this is not expressly stated, the individual features as described with reference to the particular embodiments shall be intended as auxiliary to and/or interchangeable with other features described with reference to other exemplary embodiments.
Referring to Figures 1 to 4, the busbar comprises at least one group of busbar conductors 8 and an outer casing 1 containing the group of busbar conductors 8. The casing 1 has vertical side walls, 2, 3 which extend longitudinally parallel to the group of busbar conductors 8 and transversely at least as far as the transverse extent of the group of busbar conductors 8. According to a preferred embodiment, the vertical side walls 2 and 3 are opposite and parallel to each other. Preferably, the vertical walls 2 and 3 are folded at right angles at the upper and lower ends, thereby forming a series of transverse walls 4, 5, 6 and 7. In the preferred embodiment of the invention, each side wall 2, 3 is formed as a C-shaped plate comprising a flat base which contacts the group of busbar conductors 8 and two transverse walls 4, 5, 6 and 7 respectively projecting out of the lower and upper edges of the base away from the group of busbar conductors 8. More preferably, the two transverse walls 4, 5, 6 and 7 project out of the lower and upper edges of each base to form a right angle therewith. Therefore, each side wall has a respective lower transverse wall 4, 6 and a respective upper transverse wall 5, 7, which are both orthogonal to its flat base.
According to a first embodiment of the invention, a group of busbar conductors, generally referenced 8, is interposed between the two side walls 2 and 3 and consists, for example, of four bars made of an electrically conductive material, which are electrically insulated from each other in a conventional manner for a three-phase and neutral configuration.
In the accompanying figures, the bars are designated as A, B and C for the phases and N for the neutral.
Furthermore, the busbar comprises at least one element 9, 21, 22 made of a thermally conductive material interposed between and held in tight contact with at least two contiguous busbar conductors B, C of the group of busbar conductors 8. Each element 9, 21, 22 extends longitudinally as far as the conductors B, C of the group of busbar conductors 8 and has two ends 10, 11, 23, 27 opposite each other transversely to the longitudinal extent of the element 9, 21, 22.
According to a preferred embodiment of the invention, each element 9, 21, 22 made of a thermally conductive material is formed as a plate and extends longitudinally and transversely as far as the busbar conductors of the group of busbar conductors 8.
Also, the casing 1 comprises at least one heat dissipating element 12, 13, 24, 28 connected, preferably directly connected, to a respective one of the two ends 10, 11,
23, 27 of the element 9, 21, 22.
According to a preferred arrangement of the invention, each heat-dissipating element 12, 13, 24, 28 of the casing 1 is formed as a plate and extends longitudinally as far as the group of busbar conductors 8. Preferably, each heat dissipating element
12, 13, 24, 28 of the casing 1 extends transversely at least as far as the group of busbar conductors 8.
According to a further preferred embodiment of the invention, each heat dissipating element 12, 13, 24, 28 of the casing 1 has folded portions 14, 15, 16, 17, 25, 26, 29, 30 at each of its two longitudinal free edges through which it is crimped to at least one of the side walls 2, 3 of the casing 1, thereby forming a right angle therewith. Thus, the element 9 is metallically connected at its opposite ends 10 and 11 to respective plate-like elements 12 and 13 which extend parallel to the transverse walls 4, 5, 6 and 7 of the casing 1 of the busbar, and is crimped to such walls by folded end portions 14, 15, 16 and 17. These folded portions also ensure that the side walls 1 and 2 of the casing 1 are tightly clamped against the busbar conductors and the element 9 positioned therebetween. Preferably, the assembly comprising the element 9 and the plate-like elements 12 and 13 metallically connected with its opposite ends 10 and 11, is embodied as a single, one-piece element. More preferably, such one-piece element comprising the assembly of the element 9 and the plate-like elements 12 and 13 is obtained by extrusion of a metal material, such as aluminum.
Advantageously, the heat generated by Joule effect within the busbar conductor is absorbed by the element 9 made of a thermally conductive material and is transferred therefrom mainly by conduction to the plate-like elements 12 and 13 which will dissipate it outside the casing 1.
Preferably, the aforementioned element 9 made of a thermally conductive material is positioned between the phase bars B and C because this is the position with the highest heat generation by Joule effect in the busbar conductor. Nevertheless it may be also positioned at a different pair of bars as required by the construction.
Preferably, the casing 1 comprises two heat dissipating elements 12, 13, 24, 28.
The folded portions 14, 15, 16, 17, 25, 26, 29, 30 of each heat dissipating element 12, 13, 24, 28 are crimped to two respective lower 4, 6 or upper 5, 7 transverse walls 4, 5, 6 and 7 of the two side walls 2, 3. For instance, the folded portions 14, 15 of the upper dissipating element 12 are crimped to the upper transverse walls 5, 7 of the two side walls 2, 3 respectively.
Reference will be made below to an exemplary embodiment concerning the particular case of a double busbar 1. Referring to Figures 5 to 8, which illustrate a second embodiment of the invention, a first group 18 of busbar conductors and a second group 19 of busbar conductors are shown between the walls 2 and 3, these groups being vertically arranged one above the other and being vertically separated by a spacer 20. More in detail, the busbar comprises a spacer 20, whereas the group of busbar conductors 8 comprises first 18 and second 19 groups of busbar conductors arranged vertically one above the other and separated by the spacer 20. The first 18 and second 19 groups of busbar conductors, and the spacer 20 that separates them, are placed within the casing. Particularly the sidewalls 2 and 3 of the casing extend parallel to the busbar conductors of each group 18 and 19 of conductors and vertically at the least to the same extent as the vertical extent of such superimposed groups with the addition of that of the spacer 20 interposed between the groups.
Preferably, both groups of bus conductors 18, 19 are configured for a three-phase busbar in which the phases and the neutral are designated, like in the above-described embodiment, by the same letters A, B, C and N.
Also, the double busbar comprises a first element 21 made of a thermally conductive material which is interposed between at least two contiguous busbar conductors of the first group 18 of busbar conductors, and a second element 22 made of a thermally conductive material which is interposed between at least two contiguous busbar conductors of the second group 19 of busbar conductors. In other words, each group of conductors 18, 19 comprises an element made of a thermally conductive material 21, 22 between the phase bars B and C.
Preferably, each element 21, 22 made of a thermally conductive material is directly connected to a respective heat dissipating element 24, 28 at one end 23, 24 that is distal to the spacer 20 located between the first 18 and second 19 groups of busbar conductors. Preferably, the element 21 has its end 23 distal to the spacer 20 mechanically connected to a plate-like element 24 which extends parallel to the walls 5 and 7 of the casing 1 and is crimped thereto by means of the folded end portions 25 and 26. Advantageously, the element 21 will absorb the heat generated by Joule effect within the first group of busbar conductors 18, whereas the plate-like element 24 will dissipate it outside the casing 1. Concerning the element 22 interposed between the bars of the second group of busbar conductors 19, its end 27 distal to the spacer 20 is metallically connected with a respective plate-like element 28 which extends parallel to the transverse sides 4 and 6 of the casing 1 and is crimped thereto by means of the folded end portions 29 and 30.
According to a preferred embodiment, the single or double busbar comprises clamping members 14, 15, 16, 17, 31 for holding the conductors of the group of busbar conductors 8, 18, 18 in clamped and side-by-side relationship within the casing 1 between the side walls 2, 3. For example, clamping means such as bolts may be used to fasten the plates 2, 3 of the casing together, e.g. at their outer lateral edges.
Preferably, in double busbars (Figs. 5 to 8), the clamping members 14, 15, 16, 17, 31 extend through the casing 1 and more preferably also through the spacer 20 to hold the conductors of the group of busbar conductors 8, 18, 19 in clamped and side- by-side relationship within the casing 1 between the side walls 2, 3. In the embodiment of Figures 5 to 8, the busbar conductors of the groups 18 and 19 and the plate-like elements 21 and 22 are clamped between the side walls 2 and 3 of the casing 1 also by a conventional threaded rod 31, whose head 32 engages against the plate 33, and the nut 34 engages against a second plate 35.
Those skilled in the art will obviously appreciate that a number of changes and variants as described above may be made to fulfill particular requirements, without departure from the scope of the invention, as defined in the following claims.

Claims

1. A busbar (1) comprising:
- at least one group of busbar conductors (8, 18, 19),
- an outer casing (1) containing said group of busbar conductors (8, 18, 19) and having side walls (2, 3) extending longitudinally parallel to said group of busbar conductors
(8, 18 19) and transversely at least as far as the transverse extent of said group of busbar conductors (8, 18, 19),
characterized in that it comprises:
- at least one element (9, 21, 22) made of a thermally conductive material interposed between and held in tight contact with at least two contiguous busbar conductors (B,
C) of said group of busbar conductors (8, 18, 19), said at least one element (9, 21, 22) extending longitudinally as far as said group of busbar conductors (8, 18, 19) and having two ends (10, 11, 23, 27) opposite each other transversely to the longitudinal extent of said element (9, 21, 22),
and in that
- said casing (1) comprises at least one heat dissipating element (12, 13, 24, 28) connected to a respective one of said two ends (10, 11, 23, 27).
2. A busbar as claimed in claim 1, wherein said at least one element (9, 21, 22) made of a thermally conductive material is formed as a plate and extends longitudinally and transversely as far as the busbar conductors of said group of busbar conductors (8, 18, 19).
3. A busbar as claimed in claim 1, wherein each heat dissipating element (12, 13, 24, 28) of said casing (1) is formed as a plate and extends longitudinally as far as said group of busbar conductors (8, 18, 19).
4. A busbar as claimed in claim 3, wherein each heat dissipating element (12, 13, 24, 28) of said casing (1) has folded portions (14, 15, 16, 17, 25, 26, 29, 30) at each of its two longitudinal free edges through which it is crimped to at least one of said side walls (2, 3) of said casing (1), thereby forming a right angle therewith.
5. A busbar as claimed in claim 4 wherein
- said casing (1) has two side walls (2, 3), each side wall (2, 3) being formed as a C- shaped plate and comprising a flat base which contacts said group of busbar conductors (8, 18, 19) and two transverse walls (4, 5, 6 and 7) respectively projecting out of the lower and upper edges of said base away from said group of busbar conductors (8, 18, 19).
6. A busbar as claimed in claim 5 wherein
- said two transverse walls (4, 5, 6 and 7) project out of the lower and upper edges of each base thereby forming a right angle therewith.
7. A busbar as claimed in claim 5 or 6, wherein
- said casing (1) comprises two heat dissipating elements (12, 13, 24, 28),
- said folded portions (14, 15, 16, 17, 25, 26, 29, 30) of each heat dissipating element (12, 13, 24, 28) are crimped to two respective lower (4, 6) or upper (5, 7) transverse walls (4, 5, 6 and 7) of said two side walls (2, 3).
8. A busbar as claimed in any of the preceding claims, comprising a spacer (20), wherein
- said group of busbar conductors (8, 18, 19) comprises a first (18) and a second (19) group of busbar conductors arranged vertically one above the other and separated by said spacer (20), said first (18) and second (19) groups of busbar conductors and said spacer (20) being placed within said casing (1), - said busbar comprises a first element (21) made of a thermally conductive material which is interposed between at least two contiguous busbar conductors of said first group (18) of busbar conductors, and a second element (22) made of a thermally conductive material which is interposed between at least two contiguous busbar conductors of said second group (19) of busbar conductors.
9. A busbar as claimed in claim 8, wherein each element (21, 22) made of a thermally conductive material is directly connected to a respective heat dissipating element (24, 28) at one end (23, 24) that is distal to said spacer (20) located between said first (18) and second (19) groups of busbar conductors.
10. A busbar as claimed in claim 8 or 9, comprising
- clamping members (14, 15, 16, 17 31) for holding the conductors of said group of busbar conductors (8, 18, 19) in clamped and side-by-side relationship within said casing (1) between said side walls (, 3), wherein said clamping members (14, 15, 16, 17, 31) extend through said casing (1) and said spacer (20) to hold the conductors of said group of busbar conductors (8, 18, 19) in clamped and side-by-side relationship within said casing (1) between said side walls (2, 3).
PCT/IB2017/050393 2016-01-26 2017-01-25 Encased busbar system with an improved heat dissipation WO2017130118A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
RU2018130006A RU2018130006A (en) 2016-01-26 2017-01-25 POSITIONED BUSBAR SYSTEM WITH IMPROVED HEAT SLEEVE
EP17710387.6A EP3408906A1 (en) 2016-01-26 2017-01-25 Encased busbar system with an improved heat dissipation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUB2016A000060A ITUB20160060A1 (en) 2016-01-26 2016-01-26 Barred duct
IT102016000007771 2016-01-26

Publications (1)

Publication Number Publication Date
WO2017130118A1 true WO2017130118A1 (en) 2017-08-03

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PCT/IB2017/050393 WO2017130118A1 (en) 2016-01-26 2017-01-25 Encased busbar system with an improved heat dissipation

Country Status (4)

Country Link
EP (1) EP3408906A1 (en)
IT (1) ITUB20160060A1 (en)
RU (1) RU2018130006A (en)
WO (1) WO2017130118A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109245003A (en) * 2018-11-02 2019-01-18 青岛大地母线科技有限公司 A kind of high-efficient heat-dissipating bus duct
CN109510142A (en) * 2018-12-13 2019-03-22 镇江易拓电气有限公司 Bus duct

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US3347975A (en) * 1966-04-14 1967-10-17 Westinghouse Electric Corp Bus duct having heat dissipating parts
US3384702A (en) * 1966-08-05 1968-05-21 Gen Electric Electric power busway with novel housing construction
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CN201122823Y (en) * 2007-11-30 2008-09-24 江苏天源华威电气集团有限公司 Sealing type bus
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CN109245003A (en) * 2018-11-02 2019-01-18 青岛大地母线科技有限公司 A kind of high-efficient heat-dissipating bus duct
CN109245003B (en) * 2018-11-02 2024-04-09 青岛东山集团母线智造有限公司 High-efficient heat dissipation formula bus duct
CN109510142A (en) * 2018-12-13 2019-03-22 镇江易拓电气有限公司 Bus duct
CN109510142B (en) * 2018-12-13 2019-09-13 镇江易拓电气有限公司 Bus duct

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