WO2024107051A1 - Protecteur de connexion de câble extérieur - Google Patents

Protecteur de connexion de câble extérieur Download PDF

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Publication number
WO2024107051A1
WO2024107051A1 PCT/NL2023/050605 NL2023050605W WO2024107051A1 WO 2024107051 A1 WO2024107051 A1 WO 2024107051A1 NL 2023050605 W NL2023050605 W NL 2023050605W WO 2024107051 A1 WO2024107051 A1 WO 2024107051A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
cable
housing
outdoor
cable connection
Prior art date
Application number
PCT/NL2023/050605
Other languages
English (en)
Inventor
Marco Peter Hubertus DEUZINGS
Original Assignee
Marciso B.V.
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 Marciso B.V. filed Critical Marciso B.V.
Publication of WO2024107051A1 publication Critical patent/WO2024107051A1/fr

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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
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
    • H02G15/113—Boxes split longitudinally in main cable direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/639—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
    • H01R13/6392—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap for extension cord
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5202—Sealing means between parts of housing or between housing part and a wall, e.g. sealing rings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5213—Covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/527—Flameproof cases

Definitions

  • the present disclosure concerns an outdoor cable connection protector for an electrical installation.
  • the disclosure also relates to an electrical installation comprising such outdoor cable connection protector, to the use of the outdoor cable connection protector, and to a method of protecting a connection of at least two cables with an outdoor cable connection protector.
  • Electrical installations generally include numerous electrical connections where cables are designed to make electrical contact and transfer a signal or power from one cable to another. Such cable connections must be reliable and safe for adequate operation of the electrical installation. Various cable connection protectors have therefore been developed to maintain the electrical connection in its intended state.
  • each solar panel requires direct current connections that are critical to the operation of the solar panel yet positioned at locations that are difficult to reach and thereby may present in increased risk of human error. Wrongly installed connections present an increased risk of electrical fault and thereby pose a fire hazard.
  • connectors used to connect cables of e.g. solar panels may be water proof to a certain degree, corrosion can still occur when connectors are exposed to water (in particular repeatedly and/or over longer periods of time). This corrosion of connectors gives rise to contact resistance in the connector. The heat caused by such contact resistance can cause a fire, in particular when the connector is (again) dry. Even when the connector is still wet, laying in water puddles or even submerged, a risk of electrocution presents itself. Cabling should be installed in such a way that it is prevented from laying in water. However, most fires involving photovoltaic installations in the Netherlands have been reported to be caused by badly connected connectors. In part, this may be caused by cross-mating of connectors in which different types are connected to each other. Different types of connectors do not always fit, though these are sometimes forced into a connection anyway.
  • the disclosure according to a first aspect provides an outdoor cable connection protector for an electrical installation, said outdoor cable connection protector comprising:
  • a housing defining an interior configured to accommodate a connection of at least two cables, having at least one cable entry into the interior for the at least two cables, and comprising a first section and a second section, wherein the first section and the second section are moveable from an opened state for arranging the connection in the interior to a closed state in which the first section and the second section are placed on each other to enclose the connection in the interior of the housing;
  • an intumescent material arranged in the interior of the housing and configured to expand into the interior of the housing when heated by an electrical fault in the connection.
  • the outdoor cable connection protector shields a connection arranged in its interior from outside deteriorating influences and protects the environment from potential consequences of electrical fault in said connection.
  • the housing can house the connection in the interior (i.e. the interior space defined by the housing) to protect the connection against impact. Installation is facilitated as the first section and a second section are closeable onto each other from the opened state in which the connection can be placed into the interior to the closed state enclosing the connection, so that e.g. risk of human error is reduced.
  • the seal prevents ingress of water, which could otherwise cause corrosion of the connection and/or short circuiting.
  • the intumescent material protects the electrical installation from electrical faults such as a short-circuit, open circuit or electrical arc, which could not only ruin the connection, but even cause a fire to spread to other components of the electrical installation or any other combustible material that happens to be nearby.
  • the intumescent material may readily expand upon heating by electrical fault in the connection (or indeed electrical fault in the cables of the connection) to prevent sparks or flames, or smother any flames that have arisen, by expelling oxygen from the interior.
  • the seal also prevents deterioration of the intumescent material by e.g. water that could otherwise seep into the interior of the housing.
  • the outdoor cable connection protector provides improved protection of not only to a connector inside the housing, but also the electrical installation and the direct environment outside the housing.
  • the outdoor cable connection protector may be applied in an electrical installation comprising at least two cables, wherein the at least two cables are connected to each other at their respective cable ends and the outdoor cable connection protector is arranged over the connection.
  • the electrical installation may in particular be formed by an outdoor electrical installation, preferably a photovoltaic installation.
  • the disclosure relates to an electrical installation comprising at least two cables, a connection of the at least two cables at their respective cable ends and an outdoor cable connection protector according to the present disclosure arranged over the connection.
  • the electrical installation may be an outdoor electrical installation, preferably a photovoltaic installation.
  • a method of protecting a connection of at least two cables comprising providing an outdoor cable connection protector according to the present disclosure in the opened state, arranging the connection with the at least two cables inside the opened outdoor cable connection protector, and closing the first and second sections of the housing around the connection, the at least two cables passing through the one or more than one cable entry of the outdoor cable connection protector.
  • the method may in particular be applied to outdoor electrical connections. Further, the outdoor cable connection protector may be selected to have an appropriate number of cable entries for the at least two cables of the connection.
  • a fourth aspect of the disclosure relates to the use of an intumescent material in an outdoor cable connection protector for an electrical installation.
  • FIG. 1 shows elements of the outdoor cable connection protector prior to assembly
  • FIG. 2 shows an exterior view of the outdoor cable connection protector in the closed state
  • FIG. 3 shows a cross-section at the height of a cable entry through the outdoor cable connection protector in the closed state
  • FIG. 4 shows an end view of the cross-section of FIG. 3
  • FIG. 5 shows a cross-section at the height of a coupling mechanism in the form of a snap lock through the outdoor cable connection protector in the closed state
  • FIG. 6 shows an end view of the cross-section of FIG. 5
  • FIG. 7 shows the outdoor cable connection protector in the opened state
  • FIG. 8 shows a cross-section at the height of the cable entry through the outdoor cable connection protector in the opened state
  • FIG. 9 shows an end view of the cross-section of FIG. 8
  • FIG. 10 shows a cross-section at the height of the coupling mechanism through the outdoor cable connection protector in the opened state
  • FIG. 11 shows an end view of the cross-section of FIG. 10
  • FIG. 12 shows a photograph of a housing section of an outdoor cable connection protector in its opened state prior to an arc test
  • FIG. 13A-13C show photographs of outdoor cable connection protectors in the opened state after performing the arc test.
  • FIG. 1 to 11 show an outdoor cable connection protector 1 for an electrical installation.
  • the outdoor cable connection protector 1 comprises a housing 2 having a first section 3 and a second section 4 that are closeable onto each other from an opened state (FIG. 7 - 11) into a closed state (FIG. 2 - 6) to enclose a connection of at least two cables in an interior of the housing 2 and provide at least one cable entry 5 into the interior for the at least two cables, a seal 6 configured to prevent ingress of water into the interior of the housing 2 in the closed state of the housing 2, and an intumescent material 7 configured to expand into the interior of the housing 2 when heated by electrical fault in the connection.
  • the intumescent material 7 may in particular be arranged in the interior of the housing 2, which interior may be variously shaped, for example with a smooth interior surface as in the illustrated example, though an undulated interior surface, e.g. with pockets or slots in which the intumescent material 7 is arranged, is also contemplated.
  • the housing 2 defines the interior which is configured to accommodate the connection of the at least two cables. Further, the housing 2 has at least one cable entry 5 for the at least two cables passing from an exterior of the housing 2 into the interior.
  • the housing 2 comprises the first section 3 and a second section 4, wherein the first section 3 and the second section 4 are moveable from the opened state for arranging the connection in the interior to a closed state in which the first section 3 and the second section 4 are placed on each other to enclose the connection in the interior of the housing 2.
  • FIG. 1 indicates with dashed lines how two cables 30 and their connection, e.g. in the form of a connector 31, can be arranged in the illustrated outdoor cable connection protector 1. It is readily observed that the outdoor cable connection protector 1 of the illustrated embodiment is only an example that can be adapted to another number of cables or connector types.
  • the outdoor cable connection protector 1 provides improved fire safety for electrical installations, in particular outdoor electrical installations such as photovoltaic installations, which may be arranged on a rooftop, as a floating installation or at other locations that are not readily accessible.
  • connection in this context refers to an electrical or electronic connection and the cables are electrical or electronic cables.
  • Such connection may be formed by directly joining two cables or by a separate element that indirectly couples the cables or brings the cables into physical contact.
  • cables or cable wires can be twisted, soldered or welded together and thereby define a connection.
  • the use of the outdoor cable connection protector 1 is, however, not limited to this application as optical or electro-optical connections and cables can also be used.
  • the combination of an enclosing housing 2 with a seal 6 and an intumescent material 7 configured to expand into the interior of the housing 2 upon heating by electrical fault in the connection provides improved reduction in fire hazard associated with outdoor electrical connections.
  • the intumescent material 7 is protected from ingress of water by means of the housing 2 and the seal 6 so that deterioration of the intumescent material 7 is prevented.
  • Intumescent expansion smothers any spark or fire that could arise in the interior of the housing 2 due to e.g. electrical arc or shirt-circuit with a connection arranged inside the housing 2.
  • Combustible materials of the connection may catch fire, including cable coverings.
  • the outdoor cable connection protector 1 may prevent spreading of a fire from the connector and may even prevent a fire from starting as the intumescent material 7 expands into the interior of the housing 2 as soon as a spark or the like reaches it, even before it can start a fire.
  • One cable entry 5 may be provided for each of the at least two cables of the connection. Alternatively, one or more of the cable entries 5 may be configured to receive multiple cables therethrough.
  • the at least one cable entry 5 may be formed by a recess 8 in an edge 9 of at least one of the first section 3 and the second section 4.
  • the edge 9 is in particular part of the closing surface 15 described below.
  • the first section 3 and the second section 4 in the closed state jointly define the at least one cable entry 5 therebetween.
  • both the first section 3 and the second section 4 comprise the recess 8 for the cable entry 5.
  • the recesses 8 of the first and second sections 3,4 are aligned to jointly define the cable entry 5.
  • the outdoor cable connection protector 1 may comprise at least two cable entries 5.
  • the at least one cable entry 5 may comprise at least two cable entries 5 with a cable entry 5 at each opposite end 10 of the housing 2.
  • the housing 2 may be elongate.
  • a cable entry 5 may be arranged at each end 10 of the housing 2, in particular when the housing 2 is elongate.
  • the illustrated example shows an elongate housing 2 with one cable entry 5 at each longitudinal end 10 of the elongated housing 2.
  • the housing 2 may comprise a coupling mechanism 11 configured to couple the first and second sections 3,4 in the closed state.
  • the coupling mechanism 11 may be releasable to allow opening of the housing 2 from the closed state to the opened state, for example by means of a screw, push button or the like.
  • the coupling mechanism 11 comprises at least one snap lock 12, for example as the illustrated example.
  • Multiple snap locks 12 can be arranged on the first and second sections 3,4 with one section 3,4 having a hook 13 and the other having a ridge 14 to engage the hook 13 and thereby couple said sections 3,4 in the closed state.
  • the hook 13 and ridge 14 jointly forming the snap lock 12 may be arranged at each side of the housing 2.
  • the first section 3 may be pivotally coupled to the second section 4, preferably at one or more than one side of the housing 2 from which cable entries 5 are absent.
  • the coupling mechanism 11 may include a hinge (not illustrated) to enable pivotal coupling between the first and second sections 3,4.
  • the side of the sections 3,4 at which such hinge is arranged may not include a cable entry 5, while the sides of the sections that can be taken apart, may include cable entries 5 for ease of placing the connection with its cables into the interior of the housing 2.
  • the first section 3 may be identical to the second section 4. An example of this configuration is shown in the illustrated example.
  • the housing 2 may comprise or be formed of only two sections, preferably two identical sections.
  • the housing 2 may be made of a polymeric composition, preferably comprising at least one of a polyamide, an aramid, a polypropylene.
  • the first and second sections 3,4 of the housing 2 may be made of said composition.
  • a polymeric composition is preferred for ease of manufacturing the housing 2.
  • the polymeric composition may be selected to be waterproof, to provide sufficient strength to the housing 2, e.g. withstand external pressures during use of the outdoor cable connection protector 1, and to provide sufficient resistance to heat to prevent melting thereof in normal use cases, e.g. externally due to outdoor conditions and internally due to current running through the cables 30 and the connection 31 and electrical fault therein.
  • the polymeric composition may further comprises a glass fiber.
  • construction materials for the housing 2 and/or the first and second sections 3,4 include polyamide glass fiber composite, polyamide (in particular aramide) or polypropylene.
  • the housing 2, or rather the sections 3,4 of the housing 2 can be made of a metal, alloy or ceramic.
  • the seal 6 is preferably arranged between the first section 3 and the section 4 when in the closed state.
  • the seal 6 is positioned in the first section 3 when in the opened state and between the first and second sections 3,4 when in the closes state of the housing 2.
  • the seal 6 may be formed by a separate sealing element.
  • the seal 6 may be formed monolithic with the housing 2, preferably with at least one of the sections 3,4 of the housing 2.
  • the seal 6 is preferably arranged along a closing surface 15 of at least one of the first section 3 and the second section 4. In the closed state, the seal 6 may be arranged between the sections, in particular along respective closing surfaces 15 of the first and second sections 3,4 of the housing 2.
  • the closing surface 15 may comprise a groove 16 in which the sealing element 6 is arranged.
  • Said groove 16 may also run across the cable entries 5 or the recesses 6 and preferably runs all along the closing surface 15 of the first and/or second section 3,4 to fully circumscribe the interior of the housing 2.
  • each of the first section 3 and the second section 4 comprises the groove 16 to receive the seal 6 therein. An example of this configuration is illustrated.
  • the seal 6 preferably comprises a cable clamping portion 17 arranged at or in at least one of the one or more than one cable entry 5 and configured to receive at least one cable in a holding space 18 of the clamping portion 17.
  • the cable clamping portion 17 may be configured to clamp and/or surround the at least one cable when the sections 3,4 of the housing 2 are closed onto their closing surfaces 15.
  • the seal 6 may in particular comprise such cable clamping portion 17 in addition to being arranged on at least one of the closing surfaces 15 of the sections 3,4 of the housing 2.
  • the seal 6, in particular when implemented as a separate sealing element comprises a cable clamping portion 17 for each cable entry 5 of the housing 5.
  • the cable clamping portion 17 is configured to clamp the at least one cable once received through the cable clamping portion 17 of the seal 6.
  • the cable clamping portion 17 aids in preventing ingress of water into the housing 2 along cables running from an exterior of the housing 2 into its interior.
  • the cable clamping portion 17 may be deformable from a release state into a clamping state upon closing of the first and second sections 3,4 from the opened state to the closed state.
  • the clamping portion 17 may be configured to:
  • an inlay channel 19 may be provided in the clamping portion 17 of the seal 6 to enable transverse entry of the at least one cable into the holding space 18 of the cable clamping portion 17.
  • Transverse in this context means transverse in relation to a longitudinal direction of the holding space 18 which allows passing a cable through the clamping portion 17 from an exterior of the housing 2 into the interior of the housing 2.
  • the inlay channel 19 is preferably open in the opened state of the housing 2 while it is closed in the closed state of the housing 2, thereby clamping or locking the cable inside the holding space 18 of the cable clamping portion 17 of the seal 6.
  • the housing 2 or it sections 3,4 may correspondingly be configured to close the inlay channel 19 by deformation such as bending or compression of the cable clamping portion 17.
  • the inlay channel 19 makes it possible to lay the cable(s) into the cable clamping portion 17 without decoupling any connectors that are too large to pass through the holding space 18.
  • the cable clamping portion 17 may comprises at least one protrusion 20 configured to protrude from the first section 3 onto the second section 4 in order to be deformed and/or bent by the second section 4 upon closing the housing 2 to surround the at least one cable received through the cable clamping portion 17.
  • the at least one protrusion 20 may close the inlay channel 19 in the clamping state while it may leave the inlay channel 19 open in the release state.
  • the at least one protrusion 20 may surround the at least one cable received through the holding space 18 of the cable clamping portion 17.
  • the protrusions 20 may comprise matching surfaces 21 at their distal ends 22 to come into contact when the housing 2 is closed and thereby seal the cable clamping portion 17 around the at least one cable passing therethrough.
  • the second section 4 may in particular comprise an abutment surface 23 configured to deform and/or bend the at least one protrusion 20 in the closed state.
  • the housing 2, or at least one section 3,4 thereof, may comprises the abutment surface 23 defined by a curved surface configured to engage the protrusion 20 of the cable clamping portion 17 to deform it into clamping the at least one cable end passing through the cable clamping portion 17 when the housing 2 is closed, i.e. the sections 3,4 are closed onto their closing surfaces 15. It is observed that the abutment surface 23 is in fact the groove 16 at the cable entry 5 when the first and second sections 3,4 are identical, such as is the case in the illustrated example.
  • the at least one protrusion 17 may comprise a guiding surface 24 configured to facilitate entry into the second section 4 and preferably arranged at a distal end 22 of the at least one protrusion 20.
  • the guiding surface 24 may be provided in the form of a chamfer at an exterior side of the cable clamping portion 17 facing away from the holding space 18 for the at least one cable.
  • the cable clamping portion 17 may comprise two protrusions 20, in particular be U-shaped in the release state.
  • the protrusions or legs 20 of such U-shaped clamping portion 17 may be straight or inwardly curved in the release state and preferably do not make contact, i.e. the distal ends of the protrusions 20 are spaced apart to enable transverse entry of a cable therein.
  • the cable clamping portion 17 may be O-shaped in the clamping state.
  • the protrusions 20 or leg of the U-shape may protrude from a section (e.g. the first section 3) of the housing 2 into an opposing section (e.g.
  • the protrusions 20 or legs of the U-shaped cable clamping portion 17 of the illustrated example are closed to an O-shape when the sections 3,4 of the housing 2 engage, i.e. are closed onto their closing surfaces 15.
  • the housing sections 3,4 are configured to deform the cable clamping portion 17 of the seal 6 to fully surround the cable when the housing sections 3,4 are closed onto their closing surfaces 15, while the cable clamping portion 17 of the seal 6 may enable transverse entry of cables therein when the sections 3,4 are opened.
  • a cable connection protector 1 comprising:
  • a housing 2 having a first section 3 and a second section 4 that are closeable onto each other from an opened state into a closed state to enclose a connection of at least two cables in an interior of the housing 2 and provide at least one cable entry 5 into the interior for the at least two cables;
  • a seal 6 configured to prevent ingress of water into the interior of the housing 2 in the closed state of the housing 2, wherein the seal comprises a cable clamping portion 17 arranged at or in at least one of the one or more than one cable entry 5 and configured to receive at least one cable in a holding space 18 of the clamping portion 17.
  • the seal 6, or at least the cable clamping portion 17 thereof, may be made of a resilient material, in particular an elastomeric composition.
  • the elastomeric composition may comprise at least one of a thermoplastic elastomer (TPE), a natural rubber, a synthetic rubber, a silicone, a polyurethane.
  • TPE thermoplastic elastomer
  • a combination of materials is also considered for the seal 6 and/or the clamping portion 17, for example as a two-component system for injection molding.
  • a two-component polyurethane system can be used for producing the seal.
  • two liquid streams are combined, an isocyanate stream and a polyol stream, which result in a polyurethane material, that is optionally foamed to some extent.
  • the liquid streams can be combined in or onto the closing surface 17 (e.g. the groove 16) of at least one of the first and second sections 3, 4 of the housing 2 and there cure into a polyurethane seal 6.
  • a nozzle of an application machine can apply (a mixture of) the two components as an elongated portion or bead into the groove 16 of either or both of the first and second sections 3, 4.
  • the polyol stream may comprise a foaming agent to cause expansion of the polyurethane system as it cures and forms the seal 6 of the outdoor cable connection protector 1.
  • Foamed polyurethane is preferred as it is more compliant or flexible to mitigate unevenness in mating surfaces, at least compared to non-foamed polyurethane of the same hardness.
  • the exterior surface of the polyurethane seal 6 is not sticky after curing so that the housing 2 can still be opened and closed.
  • the clamping portion 17 is optional and, when present, may also be made of the same material, though it could also be made of a different material, or it may be omitted.
  • the intumescent material 7 may be arranged in the interior of the housing 2 in various ways.
  • the intumescent material 7 may be arranged along an interior surface of the housing 2, preferably as an interior lining of at least one of the first section 3 and the second section 4.
  • the intumescent material 7 may be arranged in patches, strips or as a contiguous layer.
  • the intumescent material 7 may be arranged at the flat heads and/or the curved side of such cylindrical shape.
  • the intumescent material 7 is arranged as a hollow half-cylinder in each of the first and second sections 3, 4, thereby lining the interior of the housing 2 and may even include the flat ends 10 of the roughly cylindrical interior space.
  • the intumescent material 7 may be arranged on an interior surface of each of the first section 3 and the second section 4 (contiguously or in patches).
  • the intumescent material 7 may fully surround the connection, at least transversely seen from a longitudinal direction of the cables or the housing 2.
  • the intumescent material 7 may be shaped to match a shape of an interior surface of at least one, preferably both, of the first section 3 and the second section 4.
  • the intumescent material 7 may also be shaped with a recess at the at least one cable entry 5 into the interior of the housing 2, to thereby leave the at least one cable entry 5 free from intumescent material 7. This facilitates installation of the connection and its cables in the outdoor cable connection protector 1.
  • the intumescent material 7 is shaped as a hollow cylinder for each section 3,4 having a recess matching each cable entry 5.
  • the intumescent material 7 may comprises an intumescent composition comprising at least one of sodium silicate, graphite.
  • the intumescent composition may further comprise additives such as glues and binders.
  • glues and binders In general, the intumescent material 7 is not combustible though the seal 6 and the sections 3,4 of the housing may in fact be combustible or melt if these would not be protected by the intumescent material 7.
  • the intumescent material 7 is preferably configured to at least partly fill the interior of the housing 2 by intumescent expansion.
  • the sections 3,4 of the housing 2 in the closed state may define such interior hollow space.
  • Intumescent expansion relates to expansion upon heating at or above an activation temperature of the intumescent material 7.
  • the intumescent material 7 may expand locally to smother an electrical fault in the connection inside the outdoor cable connection protector 1, while the remaining intumescent material 7 is yet capable of intumescent expansion and smothering any additional heat sources.
  • FIG. 12 shows a photograph of a section 3 of the housing 2 of an outdoor cable connection protector 1 with the housing 2 in the opened state.
  • the section 3 is made of polyamide and a sheet of graphitic intumescent material 7 is applied to its interior surface.
  • a mesh structure is seen on the inside exposed to the interior space of the housing 2.
  • the seal 6 comprises two cable clamping portions 17 to receive cables. Tests were conducted using the illustrated design of the outdoor cable connection protector 1, the intumescent material 7 being arranged as a layer of intumescent graphite of about 2 mm in both sections 3, 4 of the housing 2. When the housing 2 was closed, the two layers of intumescent material 7 roughly formed a cylindrical surface, the interior ends 10 of the housing 2 being free from intumescent material 7.
  • FIG. 13A-13C shows photographs of the tested outdoor cable connection protectors 1 in their opened state, after the test was performed in the closed state.
  • Various polymeric materials were tested for the sections 3, 4 of the housings 2 of the outdoor cable connection protectors 1 and comprised polyamide in FIG. 13 A, polypropylene in FIG. 13B and glass-fiber reinforced polyamide in FIG. 13C.
  • a temperature sensor 40 was arranged in the interior of the housing 2 as illustrated, with its wire passing through one of the cable clamping portions 17, to record the interior temperature during the test.
  • the test was conducted as follows. Two cables 30 in the form of metal bars were placed in the housing 2 with a gap 50 between the ends of the cables 30, the housing 2 was then brought in the closed state and an arc was generated between the cables 30 inside the housing 2 for up to 4 minutes. The temperature in the interior of the housing 2 rose to about 280°C while the exterior of the housing 2 was no warmer than 98°C throughout each test. The temperature of the arc itself is known to rise to well into a few thousand degrees Celsius.
  • the intumescent material 7 had swollen locally over an extend of about 2 cm around the position of the arc (the interior being about 12 cm in length).
  • the expanded intumescent material 70 can be identified in the photographs as having a foamed or powdered appearance.
  • the outdoor cable connection protector 1 of each test had successfully prevented the arc from causing a fire or even melting the sections 3,4 of the housing 2.

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Abstract

La présente invention concerne un protecteur de connexion de câble extérieur pour une installation électrique, comprenant un boîtier délimitant un intérieur configuré pour recevoir une connexion d'au moins deux câbles, ayant au moins une entrée de câble dans l'intérieur pour ces câbles, et comprenant une première section et une seconde section, la première section et la seconde section pouvant être déplacées d'un état ouvert pour disposer la connexion à l'intérieur à un état fermé dans lequel la première section et la seconde section sont placées l'une sur l'autre pour enfermer la connexion à l'intérieur du boîtier, un joint configuré pour empêcher la pénétration d'eau à l'intérieur du boîtier lorsqu'il est à l'état fermé, et un matériau intumescent disposé à l'intérieur du boîtier et configuré pour se dilater à l'intérieur du boîtier lorsqu'il est chauffé par une défaillance électrique dans la connexion.
PCT/NL2023/050605 2022-11-16 2023-11-16 Protecteur de connexion de câble extérieur WO2024107051A1 (fr)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29804203U1 (de) * 1998-03-10 1998-05-07 Schulte, Günter, 59757 Arnsberg Schutzabdeckung für brandgefährdete elektrische Installationen
US7285725B1 (en) * 2005-03-22 2007-10-23 Rick Saman Weatherproof and restraining apparatus for electrical plugs
KR101578057B1 (ko) * 2014-10-02 2015-12-16 주식회사 희원정보통신 케이블 커넥터용 방수캡
GB2531598A (en) * 2014-10-24 2016-04-27 Intumescent Systems Ltd Fire proofed Acoustic Liners for electrical socket boxes
US20160339281A1 (en) * 2013-07-03 2016-11-24 Hilti Aktiengesellschaft Intumescent fire protection insert and assembly with intumescent fire protection insert
DE102018005772A1 (de) * 2018-07-21 2020-01-23 TKW Elektrotechnische Spezialkabel, Leitungen & Zubehör e.K. Sicherheitsbox mit Befestigungsmitteln
WO2023281066A1 (fr) * 2021-07-08 2023-01-12 Viridian Solar Limited Enceinte anti-incendie

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29804203U1 (de) * 1998-03-10 1998-05-07 Schulte, Günter, 59757 Arnsberg Schutzabdeckung für brandgefährdete elektrische Installationen
US7285725B1 (en) * 2005-03-22 2007-10-23 Rick Saman Weatherproof and restraining apparatus for electrical plugs
US20160339281A1 (en) * 2013-07-03 2016-11-24 Hilti Aktiengesellschaft Intumescent fire protection insert and assembly with intumescent fire protection insert
KR101578057B1 (ko) * 2014-10-02 2015-12-16 주식회사 희원정보통신 케이블 커넥터용 방수캡
GB2531598A (en) * 2014-10-24 2016-04-27 Intumescent Systems Ltd Fire proofed Acoustic Liners for electrical socket boxes
DE102018005772A1 (de) * 2018-07-21 2020-01-23 TKW Elektrotechnische Spezialkabel, Leitungen & Zubehör e.K. Sicherheitsbox mit Befestigungsmitteln
WO2023281066A1 (fr) * 2021-07-08 2023-01-12 Viridian Solar Limited Enceinte anti-incendie

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