EP1826795A1 - Vorrichtung zum Schutz gegen Überspannungen mit vereinfachtem Anzeigesystem und entsprechendes Herstellungsverfahren - Google Patents

Vorrichtung zum Schutz gegen Überspannungen mit vereinfachtem Anzeigesystem und entsprechendes Herstellungsverfahren Download PDF

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Publication number
EP1826795A1
EP1826795A1 EP07356026A EP07356026A EP1826795A1 EP 1826795 A1 EP1826795 A1 EP 1826795A1 EP 07356026 A EP07356026 A EP 07356026A EP 07356026 A EP07356026 A EP 07356026A EP 1826795 A1 EP1826795 A1 EP 1826795A1
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EP
European Patent Office
Prior art keywords
configuration
disconnection
mobile
disconnecting
movable
Prior art date
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Granted
Application number
EP07356026A
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English (en)
French (fr)
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EP1826795B1 (de
Inventor
Alain Reneé Robert Lagnoux
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ABB France SAS
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ABB France SAS
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Publication date
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Publication of EP1826795A1 publication Critical patent/EP1826795A1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/04—Means for indicating condition of the switching device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H01H2037/762—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts
    • H01H2037/763—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts the spring being a blade spring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/10—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess voltage, e.g. for lightning protection

Definitions

  • the present invention relates to the general technical field of devices for protecting electrical installations and equipment against electrical overvoltages, in particular transient, and in particular due to lightning.
  • the present invention relates more particularly to a device for protecting an electrical installation against overvoltages, comprising at least one protection component intended to be connected to said electrical installation, a disconnection means capable of passing from a closure configuration in which the protection component is connected to the electrical installation to an opening configuration in which said protection component is disconnected from said electrical installation, as well as to a signaling means capable of indicating the configuration in which said electrical means is located.
  • disconnection, the disconnection means and the signaling means respectively comprising a movable disconnection element and a mobile signaling element, the mobile disconnection element being able to move, during the transition from the closed configuration to the configuration of opening, according to a rotational movement following a first trajectory.
  • the present invention also relates to a method of manufacturing a device for protecting an electrical installation against overvoltages, said device comprising at least one protection component intended to be connected to said electrical installation, a disconnection means able to pass from a closure configuration in which the component of protection is connected to the electrical installation to an opening configuration in which said protection component is disconnected from said electrical installation, and a signaling means capable of indicating the configuration in which said disconnection means is located, the disconnecting means and the signaling means respectively comprising a movable disconnection element and a mobile signaling element, the mobile disconnection element being able to move, during the transition from the closed configuration to the opening configuration, according to a rotational movement following a first path.
  • protection devices usually comprise one or more overvoltage protection components, such as for example a varistor or a spark gap.
  • overvoltage protection components have two terminals for their connection to the installation to be protected.
  • the protection component or components When the protection component or components are exposed to voltages higher than a predetermined threshold value, they are able to discharge the fault current to ground while limiting the overvoltage to a value compatible with the carrying capacity of the installation and the equipment connected to it.
  • Such components and devices are generally referred to as “ surge protectors " or even as “surge arresters ".
  • the protection components are likely to be subject to significant heating up which can cause serious damage to the installation and present risks for the user, for example by triggering a fire.
  • overvoltage protection devices are generally provided with thermal disconnection means for isolating the protective component of the electrical installation to be protected in case of excessive heating thereof.
  • thermal disconnection means for isolating the protective component of the electrical installation to be protected in case of excessive heating thereof.
  • the thermal disconnection means comprise an element which is sensitive to the heat generated by the protective component, such as a fusible solder, and which, in normal operation, keeps in contact with one of the terminals of said protection component.
  • a conductive disconnection element such as a metal spring blade. Said disconnection element is in turn prestressed towards an open position in which it is separated from said terminal, so that when the heat-sensitive element releases the disconnection element under the effect of a significant heating of the protection component, said disconnection element moves and opens the circuit.
  • the thermal disconnection means When the thermal disconnection means is tripped, it isolates the protection component of the electrical installation to be protected, so that said protection component is unable to discharge fault currents and no longer fulfills its requirements. protection function vis-à-vis said electrical installation.
  • a visual signaling means which, when the thermal disconnection means is tripped, causes a control, such as a surface colored in red, to appear opposite a window situated on the apparent face. a housing in which is mounted the protection component.
  • a disconnecting means using a flexible leaf spring a signal cursor mounted in translation relative to one of the faces of the housing containing the protection component, said cursor being located at least partially on the path taken by the free end of the blade comes out when the latter bends.
  • the free end of the spring blade can interfere with the cursor so as to exert a force on the latter and propel the latter in translation along a path substantially tangential to his.
  • the devices of the prior art sometimes encounter problems of reliability of disconnection due to the resistance that can oppose the signal cursor against the opening of the disconnection means.
  • the slider is subjected to friction forces that oppose its movement, or may be trapped by jamming or jamming at the housing, which has the effect of hindering, slowing or even blocking prematurely moving the disconnecting blade.
  • a severe failure of the signaling means it is likely to prevent the effective disconnection of a faulty component and consequently to lead to a dangerous heating thereof, or even to an implementation. short circuit of the installation.
  • the kinematic connection between the disconnection blade and the signaling slider of the devices of the prior art is often achieved by means of a straight linear connection at which an edge or a small surface element of the disconnection blade bears against a small surface element of the cursor.
  • the small extent of the connection exposes the latter to an unexpected disengagement phenomenon, especially when the device is subjected to vibrations or shocks, such dislocation leading to the rupture of the connection and consequently to random or erroneous signaling. not reflecting the actual state of the device.
  • the fineness of such a connection makes it particularly sensitive to dispersions manufacturing dimensions of the elements that constitute it, which requires to observe binding provisions during manufacture and / or assembly.
  • the objects assigned to the invention are therefore intended to remedy the various disadvantages listed above and to propose a new device for protecting an electrical installation against overvoltages whose signaling means are particularly simple and reliable design.
  • Another object of the invention is to provide an overvoltage protection device whose safety in case of failure of the protection component is particularly reliable.
  • Another object of the invention is to provide a new surge protection device whose manufacture is particularly simple and inexpensive.
  • Another object of the invention is to propose a novel method of manufacturing a surge protection device which is particularly simple and inexpensive.
  • a protection device of an electrical installation against overvoltages comprising at least one protection component intended to be connected to said electrical installation, a disconnection means able to pass a closure configuration in which the protection component is connected to the electrical installation to an opening configuration in which said protection component is disconnected from said electrical installation, and a signaling means capable of indicating the configuration in which is said disconnecting means, the disconnecting means and the signaling means respectively comprising a movable disconnection element and a movable signaling element, the movable disconnection element being able to move, during the passage of the closing configuration to the opening configuration, according to a rotational movement in accordance a first path, characterized in that, during the transition from the closure configuration to the opening configuration, said movable disconnection element cooperates with the mobile signaling element to drive the latter in rotation along a second distinct path of the first trajectory.
  • the objects assigned to the invention are also achieved by means of a method of manufacturing a device for protecting an electrical installation against overvoltages, said device comprising at least one protection component intended to be connected to said electrical installation, a disconnection means adapted to pass from a closure configuration in which the protection component is connected to the electrical installation to an opening configuration in which said protection component is disconnected from said electrical installation, and a signaling means capable of indicating the configuration in which said disconnecting means is located, the disconnection means and the signaling means respectively comprising a mobile disconnection element and a mobile signaling element, the mobile disconnection element being able to move, when passing from the closed configuration to the conf opening aperture, according to a rotational movement following a first path, characterized in that it comprises an arrangement step (a) during which the movable disconnecting element is arranged relative to the mobile element of signaling such that, during the transition from the closure configuration to the opening configuration, said movable disconnection element cooperates with the mobile signaling element to drive the latter in rotation along a second path distinct from the first path.
  • the protection device 1 against overvoltages according to the invention is intended to be connected bypass (or "parallel ”) on an electrical installation to be protected.
  • electrical installation refers to any type of device or network powered electrically and likely to experience voltage disturbances, including transient overvoltages due to lightning.
  • the protective device 1 of an electrical installation against overvoltages can therefore advantageously constitute a surge arrester.
  • the protection device 1 according to the invention is advantageously intended to be disposed between a phase of the installation to be protected and the earth. It is also conceivable, without departing from the scope of the invention, that the device 1, instead of being connected bypass between a phase and the earth, is connected between the neutral and the earth, between the phase and the neutral, or between two phases (case of differential protection).
  • the protection device 1 comprises at least one protection component 2 intended to be electrically connected to said electrical installation in order to protect it against overvoltages, in particular transients.
  • each protection component 2 against overvoltages is formed by a varistor, it being understood that the use of a varistor is only indicated by way of example and does not constitute any a limitation of the invention.
  • the overvoltage protection component according to the invention is, when exposed to voltages greater than a predetermined threshold value, able to discharge the fault current to earth while clipping the surge to a value compatible with the holding of the installation.
  • said varistor is in the form of a substantially flat rectangular parallelepiped and provided with two supply terminals 15, 16.
  • the protection device 1 also comprises a disconnection means 3 adapted to ensure the electrical disconnection of the varistor 2 of the electrical installation, in particular in the event of failure of said varistor 2. More specifically, the disconnecting means 3 is preferably thermoelectric. -sensitive and able to be triggered under the effect of the heat generated during an excessive heating of the protection component 2.
  • the disconnection means 3 is able to pass from a closure configuration in which the protection component 2 is connected to the electrical installation to an opening configuration in which the protection component 2 is disconnected from said electrical installation.
  • the expression "closure configuration" designates the state of the protection device 1 in which the varistor 2 is electrically connected to the electrical installation to be protected, that is to say in which the power supply circuit of the varistor 2 is closed.
  • the expression "closure configuration” can indifferently apply to the protection device 1 as a whole, by means of disconnection 3, or to any other constituent element of the device 1 , when they are in the state that corresponds to the situation where the varistor 2 is connected to the electrical installation to be protected, that is to say when the disconnection means is in the closed configuration.
  • open configuration designates a state of the device 1 in which the varistor 2 is isolated from the electrical installation to be protected, that is to say in which the supply circuit of said varistor 2 is open.
  • the expression "opening configuration” can equally apply to the device as a whole, by means of disconnection 3 or to any other constituent element of said device 1 when these ci are in the state corresponding to the situation in which the disconnecting means is in its opening configuration.
  • the disconnecting means 3 comprises a movable disconnection element 4 which is able to move, during the transition from the closed configuration to the opening configuration, in a rotational movement following a first trajectory.
  • the movable disconnection element 4 is preferably prestressed by a biasing means which exerts on said movable disconnecting element a force which tends to return it towards its opening configuration.
  • the rotational displacement of the movable disconnection element 4 is substantially in a plane parallel to one of the main extension faces of the varistor 2.
  • the path of said movable disconnection element 4 can be substantially inscribed within the limits defined by the contours of the varistor 2 projected in the plane of said trajectory.
  • the arrangement of the movable disconnection element 4 is particularly capable of efficiently exploiting the available space and limiting the total size of the device 1.
  • the protection device 1 also comprises a signaling means 5 which is capable of indicating the configuration in which is the means of disconnection 3. More particularly, the signaling means is intended to inform the user by indicating whether the protection device 1 is in the closed configuration or in the open configuration.
  • the device 1 comprises an insulating housing 6 within which the protective component 2 is mounted, and which can also contain the disconnecting means 3 and the signaling means 5.
  • Said housing 6 can for example example be formed of a hollow body surmounted by a lid or two substantially symmetrical cheeks joined at the sagittal plane of the housing.
  • the device 1 may also comprise two conductive elements respectively forming a first connection pad 7 and a second connection pad 8, said pads being preferably housed in the housing 6 so that they allow the connection of the device 1 to the electrical installation to be protected.
  • the signaling means comprises a visual indicator 10 which is able to be positioned facing a viewing window 11 formed in the housing 6.
  • the signaling means may have a first colored surface element in FIG. green next to the viewing window 11 when the protection device 1 is in the closed configuration and presenting a second red-colored surface element vis-à-vis the window 11, replacing the green element, when the protection device is in the open configuration.
  • the signaling means is not necessarily limited to visual signaling and may comprise, for example, other elements capable of providing a remote signal, in particular electrical signal, such as mini-switches, without departing from the scope of the present invention. .
  • the signaling means 5 comprises a mobile signaling element 12 capable of making a rotational movement during the transition from the closed configuration to the opening configuration.
  • the use of a rotational movement for example by implementing an adjustable sliding pivot connection, makes it possible to simplify the guiding of said mobile signaling element, to eliminate the risks of jamming by jamming and to limit the resistance to displacement due to friction.
  • the mobile disconnection element 4 and the mobile signaling element 12 will be located vis-à-vis the same face of the varistor 2 and their trajectories will be substantially coplanar.
  • it will be advantageously possible to optimize the size of the device 1.
  • the movable disconnection element and the mobile signaling element are arranged such that, during the transition from the closed configuration to the opening configuration, said movable element disconnector 4 cooperates with said mobile signaling element 12 to drive the latter in rotation along a path distinct from the first path followed by said mobile disconnection element 4.
  • the term “cooperates” denotes the fact that the movable disconnection element 4 is capable of transferring motive power to the mobile signaling element 12, in particular during the transition from the closure configuration to the configuration of the device. opening, to drive it in rotation. More particularly, the mobile disconnection element 4 is capable of transmitting a force, in particular a motor torque, towards the mobile element of signaling 12, said force being capable of causing a movement of said mobile signaling element.
  • the mobile disconnection element 4 and the mobile signaling element 12 preferably have a common energy source formed by the biasing means which acts on said mobile disconnection element 4.
  • the fact that the mobile signaling element 12 operates a movement along a path distinct from that used by the mobile disconnection element 4 may advantageously make it possible to deport the signaling, especially at an apparent face of the housing 6. while disconnection takes place in said housing away from said apparent face.
  • the disconnecting means 3 comprises a spring blade 14, also called “ disconnection blade”, a free end of which is capable of flexing elastically during the transition from the closed configuration to the opening configuration.
  • the leaf spring 14 is electrically conductive and arranged so as to be able to electrically connect one of the connection pads 7, 8 to one of the power supply terminals 15, 16 of the varistor 2. Even more preferably when the disconnecting means 3 is in the closed configuration, the free end of the spring blade 14 is maintained prestressed by a fusible weld 20, which preferably makes a direct connection between said free end of the spring blade and the one of the terminals 15, 16. The prestress is advantageously obtained by elastic deformation of said leaf spring in the closed configuration.
  • said power supply terminal 15 to which the disconnecting blade 14 is connected is preferably located substantially in the center of a main extension face of the varistor 2.
  • the latter is capable of communicating enough thermal energy to the fuse 20 to cause the latter to rupture, in particular by melting, so as to release the free end of the spring blade 14 which then deflects under the effect of the elastic return stress and which deviates from the terminal 15 of the varistor to which it was connected.
  • the mobile disconnection element 4 is thus arranged to be able to open the electrical supply circuit of the protection component 2 by effecting the separation of a movable contact and a fixed contact during its displacement from a position that it occupies in closing configuration to a position that it occupies in opening configuration.
  • these two mobile elements are preferably coupled by a transmission member which makes a kinematic connection between them.
  • Said connection may be permanent, temporary or intermittent without departing from the scope of the invention. Preferably, this will be substantially continuous during the transition from the closed configuration to the open configuration.
  • the transmission member may in particular comprise a linkage movement system, a system for direct or indirect engagement of said frictionally movable elements, or a meshing system, in which for example a ring gear element carried by the mobile disconnection element 4 cooperates with a pinion integral with the mobile signaling element 12.
  • the mobile signaling element 12 will comprise a cam 21 against which the movable disconnecting element 4 is capable of slidingly bearing to drive said cam 21 in rotation during the passage of the configuration of closing at the opening configuration.
  • a cam-type element combines ease of manufacture, ease of assembly and robustness of operation.
  • said cam 21 is formed by a ramp 22 formed at the mobile signaling element 12.
  • the tip 14A of the free end of the spring blade 14 which is intended to come into sliding abutment against the ramp 22.
  • the mobile disconnection element and the mobile signaling element are arranged such that a part of the mobile disconnection element 4 is likely, during the passage of the configuration. closure to the opening configuration, to come into contact with the ramp 22 so that, when said movable disconnection member 4 deploys its movement, it induces a thrust force at said ramp, which thrust force is translated to times by a tilting of the mobile signaling element 12 and by a sliding of the mobile disconnection element 4 along the ramp 22.
  • such direct transmission of movement by contact between the movable disconnection element 4 and the mobile signaling element 12 makes it possible to simplify the structure of the device, which contributes to making it more compact overall and to increasing its reliability during the disconnection.
  • the ramp 22 may of course have several sections having different profiles without departing from the scope of the invention.
  • the boom sections may have profiles that differ in their respective spatial orientation, or in the concave or convex orientation of their curvatures and / or the value of their radii of curvature.
  • the ramp 22 may comprise three successive sections 22A, 22B, 22C, the first section 22A having vis-à-vis the leaf spring 14 a profile concave radius of curvature substantially increasing and the second section 22B forming a convex transition to the third section 22C, itself slightly concave or substantially straight.
  • the mobile signaling element 12 is mounted in free pivot relative to the protection component 2, that is to say that it articulates without constraint about an axis 24 , said axis being materialized or not.
  • said axis 24 of the free pivot can be integral with the housing 6.
  • the mobile signaling element 12 may advantageously comprise a tubular section 25 forming a sleeve intended to be threaded onto the axis 24 so as to form a pivot connection, possibly pivotally sliding, with the housing 6.
  • the device 1 according to the invention may also comprise a retaining means 26 which hinders the movement of the mobile signaling element 12 when the disconnection means 3 is in the closed configuration.
  • the retaining means is able to prevent the mobile signaling element 12 from moving significantly, in particular towards the position that it normally occupies in the open configuration, as long as the disconnection means is in the closed position.
  • the retaining means is intended to prevent an accidental displacement of the mobile signaling element which would lead to an erroneous indication of the real state in which the protection device 1 is located.
  • the mobile signaling element 12 comprises for this purpose a projecting portion 28 which is capable, when the disconnection means 3 is in the closed configuration, to abut against a portion of the movable element disconnector 4 to form the retaining means 26.
  • the retaining means 26 may be formed by an elastic stressing means 27 which acts at the level of the mobile signaling element 12 in a manner substantially antagonistic to the movable element of FIG. 4.
  • said resilient biasing means 27 is capable of applying to the mobile signaling element 12 a resisting torque substantially opposite to the motor torque transmitted by the mobile disconnection element 4.
  • said resilient biasing means 27 will be dimensioned such that said resistive torque has a value less than that of the engine torque, and preferably substantially negligible in front of said engine torque, so as not to constitute an obstacle to disconnection.
  • the resilient biasing means 27 may for example be formed by a return spring 27 'connecting the housing 6 to the mobile signaling element 12, as shown in FIG. 6, or by an elastic arm 27 "coming from material with the mobile signaling element 12 and coming to bear against one of the walls of the housing 6, as is illustrated in FIG. 8.
  • the retaining means 26 is able to oppose the angular displacement of said mobile signaling element 12 but that the latter is not necessarily strictly immobilized, because there may remain a clearance between the protruding portion 28 and the portion of the movable disconnection element 4 against which it is likely to abut.
  • this possible game is then dimensioned so that it is small enough that the amplitude of the slight residual angular deflection that it allows is in any case insufficient to allow the mobile signaling element to move significantly. to the position it normally occupies in the open configuration, so that the retaining means 26 effectively prevents the signaling means 5 from providing the user of the device 1 with an erroneous indication as to the configuration in which it is located. said device 1.
  • the mobile signaling element 12 is formed by a single piece 29, called “rocker arm ", which comprises a concave zone intended to cooperate with the mobile disconnection element 4, a projecting extension 28 intended to at come to bear against the mobile disconnection element 4 to prevent the displacement of said single piece 29 when the disconnection means 3 is in the closed configuration, as well as a tubular sleeve 25.
  • the mobile signaling element 12 can advantageously be formed by a rocker arm 29 of sickle-shaped geometry, which is substantially in the form of a hook whose concave zone of the curved portion corresponds to a portion of the ramp 22, whose tip, preferably flattened or rounded, forms the protruding portion 28 and whose end of the shaft supports the visual witness (s) 10.
  • the rocker arm 29 has a light structure, and may in particular be made of polyamide, polycarbonate or ABS, so that its inertia is negligible compared to the motor force developed by the leaf spring 14.
  • the mass of the tumbler 29 may be between 1 g and 5 g, and preferably less than 2 grams.
  • the device 1 comprises a first anti-recoil means 30 which is able to limit, when the disconnecting means 3 is in the opening configuration, a possible return movement of the mobile signaling element 12 to the position it occupied when the disconnecting means 3 was in the closed configuration.
  • the mobile disconnection element 4 itself which forms the first anti-recoil means.
  • the spring blade 14 is positioned, in opening configuration, so that it interferes with the trajectory that should take the rocker 29 if it had to return to the position it occupied in the closed configuration.
  • the stiffness of said blade is sufficient to prevent it from bending under the sole action of the rocker arm, in particular in case of mechanical shock to the device 1.
  • the device 1 according to the invention may also comprise a second anti-recoil means adapted to limit, when the disconnection means 3 is in the open configuration, a possible return movement of the mobile disconnection element 4 to the position it occupied in the closed configuration.
  • the second anti-recoil means can be implemented as soon as the disconnection blade 14 has sufficiently moved away from the terminal 15 of the varistor, in order to guarantee the maintenance of a minimum isolation distance between said spring blade and said power supply terminal 15.
  • Such an implementation is particularly useful in the case where the disconnection occurs under adverse voltage and current conditions likely to lead to the initiation of an electric arc between the blade 14 and the terminal 15.
  • said second anti-recoil means may be arranged to substantially prevent the free end of the leaf spring 14 from oscillating about its rest position, for example by being placed sufficiently close to said rest position to reduce the amplitude of any oscillations at a very low level, or even bearing against said free end.
  • said second anti-recoil means may be formed by a flexible elastic tongue coming of material with the ramp 22, said tongue forming a pawl capable of bending and fading to yield the passage at the free end of the leaf spring 14 when passing from the closed configuration to the opening configuration, then to stand up to prevent a return in the opposite direction of the mobile disconnection element.
  • said tongue can be retracted, under the pressure of the tip 14A, in a housing provided for this purpose in said ramp 22, so that said tongue can be flush with the profile of the ramp 22 and ensure the continuity of the latter, then rises by springback so as to project on said profile.
  • said non-return catch can be formed by the combination of the second section 22B which protrudes from the profile of the ramp 22 and the elastic stressing means 27 , 27 ', 27 "which substantially continuously plates said ramp 22 against the tip 14A, thus, if said disconnection blade 14, driven by its momentum when passing from the closed configuration to the opening configuration, passes the convex section 22B, it is unable to make a return movement to the position it occupied in the closed configuration.
  • the movable disconnection element 4 and the mobile signaling element 12 can be arranged in such a way that, when the disconnection means 3 is in the open configuration, they hinder each other's respective displacements. such that neither said movable disconnecting element 4 nor said mobile signaling element 12 can return substantially to, and even more so to, the positions they respectively occupied when the disconnecting means 3 were in the closed configuration.
  • the device 1 may advantageously comprise a stop element 32, formed for example by a shoulder of the housing 6, which limits the movement of the mobile signaling element 12 in the direction of movement which allows it to switch from the closed configuration to the open configuration.
  • the spring blade 14 is held flexed and prestressed by a fusible weld 20 which links its free end at the first supply terminal 15 of the varistor 2.
  • the first supply terminal 15 is electrically connected to the first connection pad 7, while the second terminal 16 of the varistor 2 is electrically connected to the second connection pad 8.
  • the falciform tumbler 29 which is threaded in free pivot, at its tubular sleeve 25, on the shaft 24 integral with the body of the housing 6, is placed so that the protruding extension 28 forming the tip of said rocker arm can abut against the spring blade 14.
  • Said spring blade 14 is in turn held in position by the fusible weld 20, so that it forms a barrier which prevents, or at least greatly restricts, the angular movement of said rocker arm 29 in the counterclockwise direction.
  • a portion of its free end preferably prevents the displacement of the projecting extension 28 of the rocker 29.
  • the retaining effect produced by the retaining means 26 is obtained not by a barrier as described in the preceding paragraph but by an elastic support conferred by the elastic stressing means 27, 27 ', 27 ".
  • the tip 14A may advantageously be close to the concave ramp 22, and preferably substantially rest against the latter.
  • this second stop point makes it possible to complete the retaining means 26 by substantially preventing the rocker arm 29 from pivoting in the clockwise direction.
  • the mobile signaling element 12 is substantially immobilized in rotation, by double demarcation of its angular displacement, when the disconnecting means 3 is in the closed position.
  • the rocker 29 then has a green colored face facing the observation window 11, indicating that the device is in operating condition.
  • the spring blade 14 initiates a deflection movement, its free end pivoting here in the clockwise direction, as soon as it is released from the locking effect exerted fusible welding 20.
  • the spring blade 14 when it initiates its rotary movement, the spring blade 14 disengages simultaneously from the projecting projection 28 to which it blocks the passage, so that it releases the rocker 29 from the retaining means. 26 that hindered his angular deflection, here in a counter-clockwise direction.
  • the free end of the spring blade 14 tends to deviate from the path taken by the projecting extension 28 of the rocker 29.
  • the deflection movement of the spring blade 14 is accompanied by a transmission of movement between said blade and the rocker arm 29 so that the latter rockers around the axis 24.
  • the rocker 29 and the spring blade 14 are arranged such that when the free end of said leaf spring 14 flexes during the transition from the closure configuration to the opening configuration, a portion thereof , preferably its tip 14A, pushes said rocker 29 at its concave zone so as to rock it.
  • the tip 14A progresses by sliding along the ramp 22.
  • the length of the free end of the blade spring 14 being substantially constant and the curved profile of the first section 22A of the ramp tending to approach the fixed center of rotation ⁇ of said free end, this progression is accompanied mechanically by a repulsive effect of the ramp and a progressive rotation of rocker arm 29.
  • said tip may advantageously have a curved portion which allows a progressive and regular engagement thereof on the ramp and therefore limits the risk of seizure.
  • the rocker arm 29 is particularly light and mounted in a free pivot, the latter has only a slight mechanical resistance to the movement of the spring blade, said resistance being essentially due to the friction occurring at the pivot connection 24, 25 whose resulting resistive torque is negligible compared to the engine torque resulting from the thrust force exerted by the spring blade 14 on the ramp 22 at the tip 14A .
  • the lever arm corresponding to the distance separating the axis 24 from the zone at which the spring blade 14 engages the ramp 22 makes it possible to amplify the driving torque, that is to say, to overcome the resistant torque with a relatively low thrust force.
  • the resilient biasing means 27, 27 ', 27 are dimensioned so as to generate only a particularly weak resisting torque with respect to the motor torque created by the spring blade 14.
  • the drive of the mobile signaling element takes only a small part of the driving energy used by the spring blade to perform the disconnection, and therefore does not substantially disturb this essential function of securing the device 1.
  • the profile of the ramp 22 could have irregularities, or even adopt the form of a rack, so that the contact with the tip 14A is reflected in a succession of discontinuous bearings, provided that the arrangement of said ramp 22 relative to the trajectory of the tip 14A is such that said blade can globally propel the rocker 29 by pushing it without encountering obstacles to its advance.
  • the ramp 22 will preferably have a substantially regular and smooth profile so that the respective movements of the movable disconnection element 4 and the mobile signaling element 12 are fluid, smoothly, and that the deployment of motive power is regular.
  • the control has a second face colored in red, contiguous to the green face, so that its tilting causes the replacement, facing the window 11, the green light by a red light when the means of disconnection 3 goes from its closed configuration to its opening configuration.
  • the rocking movement of the rocker 29 stops when it strikes the shoulder of the housing 32, which thus forms a limit stop against the end bearing the visual indicators.
  • the rocker arm movement is interrupted as soon as the adequate visual indicator is opposite the window 11.
  • this interruption of the rocker arm 29 occurs only after the disconnection blade 14 has sufficiently moved away from the terminal 15 of the varistor to ensure the electrical isolation of the latter.
  • the mobile signaling element 12 is substantially maintained in position when the device 1 is in the open configuration, because its angular displacement is both bounded by the stop element 32 in the direction of the advance and by the tip 14A in the direction of the return.
  • the present invention is not limited to an opening configuration in which the position of the leaf spring 14 corresponds to the crossing by the tip 14A of the convex section 22B, as illustrated in FIG. 5.
  • the rotation of the leaf spring 14 can be interrupted indifferently while the tip 14A is at the first section 22A, the second section 22B or the third section 22C.
  • said method of manufacturing a protection device 1 of an electrical installation against overvoltages said device 1 comprising at least one protection component 2 intended to be connected to said electrical installation, a disconnection means 3 capable of passing from a closure configuration in which the protection component 2 is connected to the electrical installation to an opening configuration in which said protection component 2 is disconnected from said electrical installation, as well as to a signaling means 5 capable of indicating the configuration in which it is located said disconnecting means 3, the disconnecting means 3 and the signaling means 5 respectively comprising a movable disconnection element 4 and a mobile signaling element 12, the mobile disconnection element 4 being able to move, during the transition from the closure configuration at the opening configuration, according to a rotational movement following a first path, comprises an arrangement step (a) in which the mobile disconnection element 4 is arranged relative to the mobile element signaling device 12 such that, during the transition from the closure configuration to the opening configuration, said movable disconnection element 4 cooperates with the mobile signaling element 12 to drive the latter in rotation along a second path distinct
  • said method of manufacturing a device 1 according to the invention may comprise, prior to the stage of arrangement (a), a step (b) of embodiment, preferably by molding, of a rocker 29 monolithic intended to form the mobile signaling element 12.
  • said rocker arm is substantially flattened and falciform, has a tubular sleeve 25 whose axis is substantially normal to its main extension plane, a first concave ramp section 22A of preferably formed on the edge of the rocker arm and intended to cooperate with the mobile disconnection element 4, a protruding extension 28 intended to bear against the movable disconnecting element 4 and an elongated arm (shaft) whose end is intended to serve as a support for a visual witness 10.
  • the arrangement step (a) comprises a substep (c) in which is positioned within the protective device 1, and preferably in a housing 6 for accommodating the protection component 2, a spring blade 14, one free end of which forms the mobile disconnection element 4.
  • the manufacturing method according to the invention can therefore comprise, preferably prior to the stage of arrangement (a), a step during which the protective component 2 is mounted in an insulating housing 6 provided with two connection pads 7, 8 to the electrical installation.
  • the sub-step (c) comprises a phase (c 1 ) for mounting the blade during which said spring blade 14 is brought into the housing 6, and one of the ends of said blade is fixed. 14, preferably so as to provide a connection between said said blade and a first connection pad 7 of the housing 6 to the electrical installation, while leaving free the other end of said blade 14.
  • Said sub-step (c) also preferably comprises a bending phase (c 2 ) during which the free end of the spring blade 14 is forced to bend so as to bring it closer to a first bend terminal. supply of the varistor 2 until said free end comes into substantial contact with said first supply terminal 15.
  • the sub-step (c) also preferably comprises a brazing phase (c 3 ), during which a junction is made between the free end of the spring blade 14 and the first power supply terminal 15 using a fusible filler material, preferably at low melting point, and even more preferably, containing less than 0.1% by weight of lead.
  • the arrangement step (a) also preferably comprises a substep (d) during which the mobile signaling element 12 is mounted in free pivot relative to the protection component 2, and more preferably during which the tubular sleeve 25 of the rocker arm is threaded on this axis on an axis 24 integral with the body of the casing 6.
  • the arrangement step (a) also comprises a sub-step (e) during which the first concave ramp section 22A is placed opposite the free end of the spring blade 14 , preferably at the point 14A, so that said blade, respectively said tip, can come into sliding support on said concave ramp section 22A.
  • the arrangement step (a) preferably comprises a substep (f), which can be carried out simultaneously or separately with respect to the sub-step (e), during which the rocker arm is put in place. 29 within the housing 6 so that the visual indicator indicates normal operation.
  • the implementation of the sub-step (e) and / or the sub-step (f) can lead simultaneously to the abutment of the projecting element 28 against the free end of the blade spring 14.
  • the width of the ramp 22, and more precisely the thickness of the rocker arm 29, and / or the width of the tip 14A will preferably be dimensioned so that no dislocation can occur which finally breaks the kinematic connection. between the mobile disconnection element 4 and the mobile signaling element 12.
  • the width of the spring blade 14 may be substantially greater than the deflections that possible games, especially in translation or in buttresses at the level of the pivot connection 24, 25, allow in a direction substantially parallel to the axis 24.
  • said leaf spring 14 can not leave the ramp 22 and slide above or below the rocker 29 during the transition from the closure configuration to the opening configuration.
  • the device according to the invention advantageously makes it possible to implement a particularly reliable signaling of the configuration in which the disconnection means is located.
  • the signaling means is permanently mechanically maintained in a range of controlled amplitude position, the device is in the closed configuration, in the open configuration or even during the transition from the closed configuration to the opening configuration, so that no unexpected modification of the signaling, in particular no accidental displacement of the visual indicator, is likely to occur, in particular when the device 1 undergoes a mechanical shock.
  • the means implemented to guarantee this stability of the signaling means do not in any way constitute a brake or an obstacle to the displacement of the mobile disconnection element, since the mobile signaling element has a resistance to movement. very weak compared to the driving force which animates the mobile element of disconnection.
  • the reliability of the disconnection of the protection component in the event of excessive heating of the latter is not significantly affected by the signaling means.
  • the device according to the invention advantageously has an optimized cost of production because it comprises a small number of pieces of relatively simple geometry, therefore inexpensive to manufacture, and easy to assemble.
  • said device comprises, in particular in a preferred variant illustrated in FIGS. 1 to 5, only two moving parts, namely the rocker 29 and the spring blade 14, without an additional spring-type propulsion element be necessary.
  • assembly operations are likely to be easily automated because the mechanical connections used do not require complex approach and placement movements on the one hand, and that these are relatively insensitive to the dispersions of the manufacturing dimensions on the other hand.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuses (AREA)
  • Thermistors And Varistors (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
EP07356026.0A 2006-02-24 2007-02-23 Vorrichtung zum Schutz gegen Überspannungen mit vereinfachtem Anzeigesystem und entsprechendes Herstellungsverfahren Active EP1826795B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0601678A FR2897989B1 (fr) 2006-02-24 2006-02-24 Dispositif de protection contre les surtensions avec systeme de visualisation simplifie et procede de fabrication correspondant

Publications (2)

Publication Number Publication Date
EP1826795A1 true EP1826795A1 (de) 2007-08-29
EP1826795B1 EP1826795B1 (de) 2014-01-29

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EP07356026.0A Active EP1826795B1 (de) 2006-02-24 2007-02-23 Vorrichtung zum Schutz gegen Überspannungen mit vereinfachtem Anzeigesystem und entsprechendes Herstellungsverfahren

Country Status (5)

Country Link
US (1) US7738231B2 (de)
EP (1) EP1826795B1 (de)
CN (1) CN101038804B (de)
ES (1) ES2458495T3 (de)
FR (1) FR2897989B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2194542A3 (de) * 2008-12-03 2010-07-14 KIWA spol.s r.o. Überspannungsschutzvorrichtung mit Schutzstatusanzeige
EP2602805A1 (de) * 2011-12-07 2013-06-12 Legrand France Housing for overvoltage protection device and related overvoltage protection device
EP2274760B1 (de) * 2008-04-11 2017-04-19 Weidmüller Interface GmbH & Co. KG Elektrische schaltung mit einem mittel zur signalisierung
WO2023227248A1 (en) * 2022-05-26 2023-11-30 Eaton Intelligent Power Limited Overvoltage protection device with improved integrated overtemperature protection

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DE102008048644B4 (de) * 2008-08-01 2017-08-24 DEHN + SÖHNE GmbH + Co. KG. Überspannungsschutzgerät mit einem oder mehreren parallel geschalteten, in einer baulichen Einheit befindlichen überspannungsbegrenzenden Elementen
DE102009004317A1 (de) * 2008-08-22 2010-02-25 Dehn + Söhne Gmbh + Co. Kg Schnelle Abtrennvorrichtung
DE102008047396B3 (de) * 2008-08-22 2010-03-11 Dehn + Söhne Gmbh + Co. Kg Überspannungsschutzgerät mit thermischer Abtrennvorrichtung
FR2958789B1 (fr) * 2010-04-09 2012-05-11 Abb France Dispositif de protection contre les surtensions transitoires a deconnecteur thermique ameliore
CN102377176A (zh) * 2010-08-13 2012-03-14 施耐德电器工业公司 浪涌保护设备
CN103620703B (zh) * 2011-06-17 2016-12-14 保险丝公司 热金属氧化物变阻器电路保护设备
US8743525B2 (en) 2012-06-19 2014-06-03 Raycap Intellectual Property, Ltd Overvoltage protection devices including wafer of varistor material
US9906017B2 (en) 2014-06-03 2018-02-27 Ripd Research And Ip Development Ltd. Modular overvoltage protection units
CZ306938B6 (cs) * 2015-10-23 2017-09-27 Jozef ÄŚerniÄŤka Zařízení pro přepěťovou ochranu s vysokým krytím, zejména pro ochranu LED veřejného osvětlení a způsob jeho výroby
USD818443S1 (en) * 2016-03-16 2018-05-22 Df, S.A. Fuse holder
US10319545B2 (en) 2016-11-30 2019-06-11 Iskra Za{hacek over (s)}{hacek over (c)}ite d.o.o. Surge protective device modules and DIN rail device systems including same
US10447026B2 (en) 2016-12-23 2019-10-15 Ripd Ip Development Ltd Devices for active overvoltage protection
US10707678B2 (en) 2016-12-23 2020-07-07 Ripd Research And Ip Development Ltd. Overvoltage protection device including multiple varistor wafers
US10340110B2 (en) 2017-05-12 2019-07-02 Raycap IP Development Ltd Surge protective device modules including integral thermal disconnect mechanisms and methods including same
US10685767B2 (en) 2017-09-14 2020-06-16 Raycap IP Development Ltd Surge protective device modules and systems including same
US11739723B1 (en) 2018-03-20 2023-08-29 Zombiebox International, Inc. Ignition interrupter and related methods
US10883469B1 (en) * 2018-03-20 2021-01-05 Zombiebox International Llc Ignition interrupter and related methods
US11223200B2 (en) 2018-07-26 2022-01-11 Ripd Ip Development Ltd Surge protective devices, circuits, modules and systems including same
DE102018125520A1 (de) * 2018-10-15 2020-04-16 Dehn Se + Co Kg Überspannungsschutzgerät mit mehreren Überspannungsableitern und diesen jeweils zugeordneter, insbesondere thermischer, Abtrennvorrichtung
US11862967B2 (en) 2021-09-13 2024-01-02 Raycap, S.A. Surge protective device assembly modules
US11723145B2 (en) 2021-09-20 2023-08-08 Raycap IP Development Ltd PCB-mountable surge protective device modules and SPD circuit systems and methods including same
US11990745B2 (en) 2022-01-12 2024-05-21 Raycap IP Development Ltd Methods and systems for remote monitoring of surge protective devices

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EP0451481A2 (de) * 1990-04-11 1991-10-16 Felten & Guilleaume Energietechnik AG Prüfeinrichtung für Fehlerstromschutzschalter
EP0897186A2 (de) * 1997-08-14 1999-02-17 Siemens Aktiengesellschaft Schaltmechanismus für einen Schulzschalter
US20010022268A1 (en) * 2000-03-17 2001-09-20 Serge Guille Circuit breaker motor drive
WO2005112211A1 (fr) 2004-04-19 2005-11-24 Soule Protection Surtensions Dispositif de protection contre les surtensions pourvu de moyens de deconnexion et de visualisation ameliores

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EP0451481A2 (de) * 1990-04-11 1991-10-16 Felten & Guilleaume Energietechnik AG Prüfeinrichtung für Fehlerstromschutzschalter
EP0897186A2 (de) * 1997-08-14 1999-02-17 Siemens Aktiengesellschaft Schaltmechanismus für einen Schulzschalter
US20010022268A1 (en) * 2000-03-17 2001-09-20 Serge Guille Circuit breaker motor drive
WO2005112211A1 (fr) 2004-04-19 2005-11-24 Soule Protection Surtensions Dispositif de protection contre les surtensions pourvu de moyens de deconnexion et de visualisation ameliores

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2274760B1 (de) * 2008-04-11 2017-04-19 Weidmüller Interface GmbH & Co. KG Elektrische schaltung mit einem mittel zur signalisierung
EP2194542A3 (de) * 2008-12-03 2010-07-14 KIWA spol.s r.o. Überspannungsschutzvorrichtung mit Schutzstatusanzeige
EP2602805A1 (de) * 2011-12-07 2013-06-12 Legrand France Housing for overvoltage protection device and related overvoltage protection device
FR2984006A1 (fr) * 2011-12-07 2013-06-14 Legrand France Boitier pour dispositif de protection contre les surtensions et dispositif de protection contre les surtensions associe.
RU2623503C2 (ru) * 2011-12-07 2017-06-27 Легран Франс Блок для устройства защиты от перенапряжений и соответствующее устройство защиты от перенапряжений
WO2023227248A1 (en) * 2022-05-26 2023-11-30 Eaton Intelligent Power Limited Overvoltage protection device with improved integrated overtemperature protection

Also Published As

Publication number Publication date
EP1826795B1 (de) 2014-01-29
FR2897989B1 (fr) 2008-05-09
FR2897989A1 (fr) 2007-08-31
US7738231B2 (en) 2010-06-15
ES2458495T3 (es) 2014-05-05
US20070217106A1 (en) 2007-09-20
CN101038804B (zh) 2011-04-20
CN101038804A (zh) 2007-09-19

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