Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
  • H01R25/16—Rails or bus-bars provided with a plurality of discrete connecting locations for counterparts
  • H01R25/161—Details
  • H01R25/162—Electrical connections between or with rails or bus-bars

Definitions

• the present invention relates to a prefabricated electrical connection device for connection to a busbar.
• connection devices Is commonly used for the distribution of electrical energy, distribution cabinets containing busbars associated with the respective phases and to which the user devices are connected or providing the protections of the divisional circuits.
• Known connection devices have the drawback that they require long periods of time for connection to a user device and that they entail a high wiring cost.
• this prefabricated electrical connection device for connection to a set of bars extending parallel to each other, is characterized in that the parallel bars between them, separated by air intervals are located one behind the other, in a direction perpendicular to the planes of the bars, intermediate connecting members each provided with an insulating external sheath, are fixed respectively to the bars and extend forward , perpendicular to these bars, the bars are pierced with aligned holes through which extend the intermediate connection members fixed, at their rear ends, to the bars situated behind the first bar, so that the front end of 1 conne- intermediate xion fixed to the first bar, and the anterior ends of the intermediate connecting members fixed to the other bars from the second are found to be all located in front of the first bar, in the same plane perpendicular to the bars.
• the perforations of the bars are of such a dimension that the value of the admissible intensity is only slightly affected by this passage.
• the anterior ends of the intermediate connection members are advantageously killed in the same plane parallel to the planes of the bars. 5
• the invention also relates to the devices for protection against short-circuit currents cooked in particular in electrical energy distribution installations.
• the user devices are generally connected to the connection cabinets containing busbars associated with the respective phases of the network, by means of protection devices.
• the protection devices of the divisional circuits 5 are calculated to ensure protection against short-circuit overcurrents generated in the network, for example as a result of an accidental short-circuit caused by the breakdown of a user device. , by assimilating the 0 current paths in the connections of the distribution cabinet to short circuits devoid of any impedance.
• protective devices such as circuit breakers must be designed to withstand very large currents, which requires a corresponding dimensioning of the elements which constitute them, in particular conductors and movable members, arc extinguishing means and the like.
• the electrical connection device of the type defined above in addition to being of a particularly simple construction compared to known connection devices and also simplifies the connection operations between the network and the devices. users, has a surprising property.
• connection device when connected between the network and a user device, performs the function of short-circuit current limiter.
• the invention * * therefore also relates to an electrical connection device of the type defined above, characterized in that it constitutes an overcurrent limiter.
• FIG. 1 is a profile view of a connection device electric busbar following the invention.
• Figure 2 is a partial elevational view of the connection device of Fig 1, the bars being devoid of the intermediate connection members.
• Figure 3 is a cross-sectional view, on a larger scale, of a connector of the steep type.
• Figure 4 is an elevational view of the con- nector of figure 3.
• FIG. 5 is a plan view of the connector of FIG. 4.
• FIG. 6 is an electrical diagram showing the function of overcurrent limiter of the electrical connection device according to the invention.
• the electrical connection device according to the invention which is shown in FIGS. 1 and 2 is intended to supply electrical current to any user device which can be connected to a set of vertical bars in any number, for example the number of three in the example described, namely bars 1, 2 and 3.
• the bars separated by air gaps extend parallel to one another and they are arranged one behind the other, bar 1 being the anterior bar of the succession of bars.
• the electrical connection of the bars 1, 2, 3 with any electrical user device, not shown, is effected by means of respective intermediate connection members 4, 5 and 6 which extend horizontally, that is to say per ⁇ perpendicular to the planes of bars 1, 2 and 3.
• Each intermediate connection member 4, 5, 6 is fixed, at its rear end, to the corresponding bar 1, 2, 3, by means of a screw 7.
• This screw 7 passes through a hole 8, of small diameter, drilled in the bar and it is screwed dan a thread pre ⁇ seen in the rear end of an internal tube 9 does not ⁇ an electrically conductive material, for example brass, of the intermediate connection member.
• This conductive tube 9 is covered with a barrel of insulating material 11 which constitutes a protective sheath.
• each of the connecting members intermediate 4, 5, 6 carries, at its front end, a connection member 12, of any known type, which provides the electrical connection directly upstream of the user device.
• the first intermediate connection member 12 of any known type, which provides the electrical connection directly upstream of the user device.
• the second intermediate connection member 5 which is integral with the second bar 2 and which is located under the first intermediate connection member 4, also extends forward and passes through a hole 13 drilled in the first anterior bar 1 below the hole 8 for fixing the first intermediate connection member 4.
• This hole 13 has a
• the second intermediate connection member 5 has a length greater than that of the first intermediate connection member 4, the distance between the first two bars 1,2 so that its front end, that is to say its connecting member 12 is located in the vertical plane parallel to the bars 1, 2, 3 passing through the connecting member front 12 of the first intermediate connection member 4.
• the third intermediate connecting member 6 which is the lowest, is fixed, at its rear end, to the third bar 3, by means of a screw 7 passing through a hole 8, and it s' extends through the first and second bars 1 and 2, passing through holes 13 horizontally aligned with one another and with the hole 8 drilled in the third bar 3.
• the third intermediate connection member 6 has a length greater than that of the two xth intermediate member 5 of the distance between the second and third bars 2,3, so that its front connecting member 12 is located below the connecting members 12 of the other two 5 intermediate connecting members 4 and 5 which are find above him.
• FIGS 3 to 5 illustrate a form of e-
• This connector is suitable for relatively low intensities, up to approximately 60 am ⁇ .
• This connector is made up of a brass 0- watch 14 of substantially omega shape, au ⁇ which a hardened steel clip 15 ensures its pinching effect and gives it its quality of contact.
• This latch 14 is engaged by pinching on a bar 16 of rectangular cross section.
• the connector is
• the connector also comprises an overmolded external part 18 which has an upper surface 19 admitting a racking-in shock.
• the conductors 1, 2 and 3 have several series of holes 8, 13 so that the electrical connection device allows connection to the conductors in the form of bars 1 to 3 as many user devices as the conductors 1 to 3 comprise series of holes.
• the conductors 1 to 3 all similar to the conductor 1, from a conductor bar, made of copper for example in which are drilled holes 8 of small diameter and holes 13 of larger diameter so that a hole 8 of small diameter succeed two holes 13 of larger diameter and to cut the conductors 1 to 3 in the bar so that the first series of holes located at the upper end of the first conductor 1 is formed of a hole 8 of small diameter followed by two holes 13, of larger diameter, the corresponding series of holes of the second conductor 2 being formed of a hole 13 of larger diameter followed by a hole 8 of small diameter and of a hole 13 of larger diameter and the corresponding series of holes of the third bar 3 being formed of two holes 13 of larger diameter followed by a hole 8 of small diameter
• connection device it is thus possible to use a standard bar for the three conductors 1 to 3, which further simplifies the manufacture of the connection device of the invention. Furthermore, such an arrangement makes it possible to connect user devices on either side of the connection device, which can be useful for the installation of the equipment to be supplied.
• the conductors 1, 2 and 3 are bare and arranged at distances such that their mu ⁇ tual insulation is ensured by the air without it being necessary to interpose between conductors of separating elements made of insulating material.
• connection device according to the invention has good mechanical resistance, in particular to the elec ⁇ trodynamic forces in comparison with the connection devices of conventional construction.
• Figure 6 there is shown the electrical diagram of a supply circuit of a user device connected to the network via an electrical connection device according to the in ⁇ ventaon.
• the electrical connection device 20 according to the invention is connected to the three-phase network as described with reference to FIGS. 1 and 2.
• a user device 21 is connected to the connection device via a circuit breaker 22.
• the Applicants have found that the device of the invention has a high impedance in the event of a short circuit caused on the user device .
• connection device 20 was up to four times less than the short-circuit current of which the circuit would be the seat if a conventional electrical distribution device was used.
• connection device of the invention which manifests itself during the appearance of transient phenomena such as the production of a short circuit caused by the appearance of an operating anomaly in the user device 21.
• This increased impedance of the electrical connection device according to the invention is due to the original construction of this device, and probably caused by the crossings between the connection bars with the network and the intermediate connection members which pass through them.
• connection device which has just been described opens very interesting prospects in the field of the reduction of the dimensions of the protection device to be inserted in the circuit of use between the connection device and the electrical load (s) connected to the mains through it.
• the electrical connection device according to the invention provides a significant limitation of the short-circuit currents makes it possible to place between the device and the loads a protection device of reduced power and consequently of a lesser cost, which makes it possible to considerably reduce the cost price of the supply installations.

Landscapes

• Connections Arranged To Contact A Plurality Of Conductors (AREA)
• Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Applications Claiming Priority (4)

Publications (2)

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ID=26224649

Family Applications (1)

Country Status (4)

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• 1986
  • 1986-07-31 US US07/044,941 patent/US4815985A/en not_active Expired - Fee Related
  • 1986-07-31 DE DE8686904840T patent/DE3686249T2/de not_active Expired - Fee Related
  • 1986-07-31 EP EP86904840A patent/EP0231310B1/de not_active Expired - Lifetime
  • 1986-07-31 WO PCT/FR1986/000272 patent/WO1987000979A1/fr active IP Right Grant

Non-Patent Citations (1)

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