Title of Invention

"FUSE ARRANGEMENT FOR A SWITCHGEAR ASSEMBLY, IN PARTICULAR FOR A MEDIUM-VOLTAGE SWITCHGEAR ASSEMBLY"

Abstract

Safety arrangement for a switchgear assembly, having a cylindrical insulating container, which consists of insulating material and is open at a first end, and into which a fuse cartridge or fuse can be inserted, the first end of said fuse cartridge or fuse being electrically conductively connected to a first contact arrangement and the second end being electrically conductively connected to a second contact arrangement. The fuse cartridge is fixedly connected at its first end to a closure apparatus for the insulating container, which closure apparatus has a sealing body (41) and a sealing head (43) connected to the sealing body (41). A spring arrangement (82, 83) is provided between the sealing body (41) and the sealing head (43).

Full Text

WO 2006/089643 PCT/EP2006/001138 Safety arrangement for a switchgear assembly, in particular for a medium-voltage switchgear assembly Description The invention relates to a fuse arrangement for a switchgear assembly, in particular for a medium-voltage switchgear assembly, in accordance with the precharacterizing clause of claim 1. Such a fuse arrangement has been disclosed, for example, in DE 41 16 058. This fuse arrangement comprises a cylindrical cartridge-type holder consisting of insulating material, which is sealed at one end and has a contact-making device there for a fuse cartridge inserted into the holder. At the other, open end, a holder cover is arranged which bears against the free end side of the holder and is screwed fixedly there. An electrically conductive connection between the fuse and a connection contact is produced by a tensioning apparatus, which has an inner ring with an outer cone and an outer ring with an inner cone, which are in the form of spring ring tensioning elements. The movement of the tripping pin on the fuse is transferred to a striker pin by means of a slide and a deflecting lever, which striker pin is guided such that it can move in the holder cover and runs perpendicularly to the mid-axis of the fuse. FR 2 607 330 has disclosed a fuse arrangement in which a fuse is introduced into a cylindrical container sealed at one end; a contact cylinder, with whose inner face the inner end of the fuse comes into contact, is located within the container at the sealed end. This contact container has a journal, which is passed out of the bottom side of the container, with the result that an electrical line can be connected there. The opposite open end of the container has an inner cone form, which WO 2006/089643 PCT/EP2006/001138 - 2 - tapers towards the container interior and which interacts with a likewise conical stopper, whose outer face is matched thereto, the outer face of the stopper being pressed by the cover against the inner face of the cone form on the container. In the region of the free end of the cylindrical container, there is a contact element on the inner side which is passed to the outside, with the result that a further electrical conductor can be connected from the outside. A similar electrode is also integrally formed on the contact cylinder, with the result that there are in total three connection possibilities: a first one at the open end, the second one at the closed end, both running perpendicularly to the mid-axis of the fuse, and the third running in the direction of the mid-axis of the fuse at the lower end. A similar embodiment is also described in EP 0 81 653 Al. The fuse container, into which the fuse is inserted, is sealed at one end and has a contact cylinder there which has a projection which protrudes in the direction of the fuse longitudinal axis from the bottom of the container. The other end, in the same way as in the arrangement according to FR 2 607 330, is sealed by means of a cone stopper consisting of elastic material, no further details being given as to how the stopper is fixed. In all known arrangements, easy removal of the fuse is not possible. EP 0 389 029 Al has disclosed a fuse arrangement which has a container consisting of an insulating material which is closed at one end, into which container the fuse can be inserted; a grip device being provided at the other end which makes it possible for the fuse to be removed. This grip device has a shaft consisting of an insulating material, which is introduced into the interior of the container. The shaft has an electrically conductive contact sleeve at the inner WO 2006/089643 PCT/EP2006/001138 - 3 - end, which contact sleeve comes into electrically conductive connection with the adjacent contact of the fuse. At its other end, it has a grip device, which is formed from a plate on which two walls are fitted which are arranged perpendicularly with respect thereto and are fixed thereto and between which there is a spindle which acts as a shaft for manipulating the grip device. The object of the invention is to further improve a fuse arrangement of the type mentioned at the outset such that removal and fitting of the fuse is simplified. This object is achieved according to the invention by the features of claim 1. Accordingly, the invention is characterized by virtue of the fact that the fuse cartridge is fixedly connected at its first end to a closure apparatus which is arranged on the front side, preferably on the frame or on the front wall of the switchgear assembly, which closure apparatus has a sealing body, whose outer face has an outer cone form tapering in the direction of the fuse and corresponding to a matched inner cone form at the first end of the insulating container, and a sealing head connected to the sealing body, and that a spring arrangement is provided between the sealing body and the sealing head, which spring arrangement exerts a force on the sealing body which presses it into the inner cone form of the insulating container in the fitted position, the sealing head being arranged outside of the insulating body. In a particularly advantageous manner, a spring arrangement is provided which has a nonlinear spring characteristic. Such a nonlinear spring characteristic preferably has a disk spring arrangement having at least one disk spring. WO 2006/089643 PCT/EP2006/001138 - 4 - In accordance with a particularly advantageous configuration of the invention, at least one pair of springs comprising two disk springs is provided, the disk springs of each pair of springs bearing against one another at their inner edges and bearing against the sealing body or the sealing head with their outer edges. A preferred configuration may be that the sealing body consists at least partially of a soft-elastic material, for example silicone rubber. In this case, the sealing body may either consist completely of a soft-elastic material or be provided with a soft-elastic layer on its outer cone form. It is naturally also possible for a soft-elastic layer for sealing purposes to be provided on the inner cone form in the same way as on the outer cone form. Preferably, when the sealing body consists of a soft- elastic material, a plate is fitted on the end face facing the sealing head, which plate transfers the force of the spring arrangement onto the sealing body. In accordance with an advantageous configuration, the sealing head is coupled to a lever arrangement, with which the sealing head can be brought from a position in which the spring arrangement is tensioned into a position in which the spring arrangement is relieved of tension, and back again. In accordance with a particularly advantageous configuration of the invention, a holding arrangement, which has a tulip-shaped finger arrangement located on a circular circumference, can be fitted to the fuse- side end of the sealing body, with which holding arrangement the first end of the fuse is mechanically and fixedly connected. A tensioning element, with which WO 2006/089643 PCT/EP2006/001138 - 5 - the finger arrangement is pressed against the fuse, also belongs to the finger arrangement. Further advantageous configurations of the invention are given in the further dependent claims. The invention, further advantageous configurations and improvements and further advantages will be explained and described in more detail with reference to the drawing, in which an exemplary embodiment of the invention is illustrated and in which: figure 1 shows a front view of a switchgear assembly having a fuse arrangement, figure 2 shows a schematic sectional view through the first end of a fuse container with a fuse inserted, figure 3 shows a perspective sectional view of the other end of the insulating container, without a fuse, figure 4 shows a sectional view of a sealing body with a sealing head, figure 5 shows a perspective view of a lever arrangement, with which the sealing head and sealing body can be removed or fitted, and figure 6 shows a force/path length characteristic of a spring arrangement between the sealing head and the sealing body. A switchgear assembly, as is known, for example, from DE (Mp. No. 05/525) submitted at the same time, has a switchpanel 10, in whose upper region busbars 11 are WO 2006/089643 PCT/EP2006/001138 - 6 - fitted, to which switch disconnectors 12 are connected. The lower end of the switch disconnectors, i.e. of each individual switch disconnector pole 12, is electrically conductively connected with conductors 13, 14 and 15 to in each case one fuse arrangement 16, 17 and 18. The fuse arrangements 16 to 18 are located beneath the switch disconnector poles, and cable connection points 19, 20 and 21 are provided beneath the fuse arrangements 16 to 18, which cable connection points are electrically conductively connected to the fuse arrangements 16 to 18 via further conductors 22, 23, 24. In this case, the conductors 13, 14 and 15 are connected at the second end of the insulating container, whereas the conductors 22, 23 and 24, which lead to the cable connection points 19, 20 and 21, are connected to the fuse arrangements 16 to 18 approximately in the central region, measured in the longitudinal direction of said fuse arrangements. Reference is now made to figure 2. A fuse arrangement according to the invention comprises a cylindrical insulating body 30, whose end located on the left-hand side in the drawing, i.e. the second end 31, is sealed with an electrically conductive cap 32, the cap 32 with a cylindrical wall 33 surrounding the outer face of the insulating body 30. In this case, the insulating body 30 has a groove 30a on its outer face, into which groove an annular fixing element 30b is inserted, to which the cylindrical wall 33 of the cap 32 is fastened. A peripheral flute 32b, which is directly opposite a flute 30c in the region of the end edge of the insulating body 30, is introduced on the inner face 32a of the cap 32 in the region of the wall 33; a seal 32c, preferably an 0 ring seal, is inserted into the peripheral toroid formed thereby. Furthermore, WO 2006/089643 PCT/EP2006/001138 - 7 - a contact arrangement 34 is also fastened to the inner face 32a, which contact arrangement has a tulip contact form. A connection 35 is provided on the outer face of the wall 32, to which connection the conductor 13 is intended to be connected radially, for example. A fuse 36 is located within the cylindrical container or the insulating container 30, a contact bolt 37 protruding from one front end of said fuse, which contact bolt is brought into electrically conductive connection with the contact arrangement 34. Contact is made between the other end of the fuse 36 and a contact device, see further below, which is electrically conductively connected to a connection 39, which runs perpendicularly to the longitudinal axis of the fuse 36, via lines 38 running internally on the insulating body 30, which connection 39 is located approximately in the center between the two ends of the insulating body 30 and is connected to in each case one conductor 22, 23, 24. Reference is now made to figures 3 and 4. The insulating container 30 has, at its first end 31a, which is opposite the second end with the metal cap 32, see figure 3, a cone face 40 on its inner face, which cone face tapers or extends outwards into the interior of the insulating container. A sealing body 41, which consists of an elastic material, for example of silicone, and whose outer face 42 has a cone form, which tapers into the interior of the container 30 and is matched to the inner cone face 40, is inserted into this cone face 40. A sealing head 43 is coupled to the sealing body 41, the sealing head 43 being capable of moving to a slight extent in relation to the sealing body 41. An insulating tube 44 is guided within the WO 2006/089643 PCT/EP2006/001138 - 8 - sealing body 41, which insulating tube has an outer thread 4 5 at the end located on the left-hand side in the drawing in figure 4 and faces the fuse, with which outer thread the tube 44 is screwed into a connecting ring 46 with an inner thread. At the tapered end, the sealing body 41 has a bowl-like depression 47, against whose inner face 48 a bearing ring 49 consisting of an electrically conductive material is applied, which bearing ring is matched to the contour of the inner face 48 and, when the fuse is in operation, is at a high-voltage potential. The bearing ring 4 9 also bears against the inner face 48. The bearing ring 49 has a bell form, the open side of the bell form being opened in the direction into the interior of the insulating container. The sealing body 41 surrounds the outer face 48 of the bell form; this bell form is selected such that the sealing body 41 is supported on its total outer face 42 in the direction of the outer face 42 when it is compressed. Webs 50, 51 of fixing elements 52, 53, which webs are bent back inwards, are held fixedly between the L-shaped ring 46 and the bearing element 49, the long limbs 52a, 53a of said fixing elements running perpendicularly to the longitudinal extent of the fuse. Only two fixing elements 52, 53 are shown in figure 4; however, a plurality of them are arranged which together form a type of tulip, which is surrounded on the outside by means of a tensioning device 54, with the result that the inner diameter of the fixing elements 52, 53 is variable. The first end of the fuse 36, which is illustrated partially by dashed lines here, is plugged with a protrusion 36a between the fixing elements 52, 53 and held fixedly between the fixing elements 52, 53 by the tensioning device 54, which surrounds the fixing elements 52, 53 on the outside and may be a tube-tensioning shell, pressing these fixing elements 52, 54 against the outer face of the protrusion 36a, with the result that the fuse 36 is fixedly connected to the sealing head 41. WO 2006/089643 PCT/EP2006/001138 - 9 - Contact springs 131 are fitted to the fixing elements 52, 53, which also act as contact fingers, which contact springs are pressed radially outwards by a resilient tensioning ring 132 in such a way that, when the sealing body 41 is inserted into the container 30 together with the fuse 36, these contact elements 131 are pressed against contact elements 133, which correspond to the line 38. The current therefore flows through the fuse 36 to the fixing elements 52 and 53 and therefore to the contact elements 131 and, via the inner line 133, 38, to the connection point 39. The inner line 38 may be formed from a plurality of elongate conductor sections, which are fitted to the inner face of the insulating container 30. Belonging to the fuse (not illustrated) is a transmission element 55, to which a tripping rod 56 is connected, which is guided movably through the interior of the tube 44 and, in the position illustrated in figure 4, does not protrude beyond the sealing head 43. In the event of the fuse responding, the tripping rod 36 is moved in the arrow direction P by means of a spring, as a result of which tripping for a superordinate circuit breaker is carried out. A guide element 57 for the tripping rod 56 is integrally formed on the inner side of the tube 44 in the region of the thread, which guide element is annular and is connected to the inner wall of the tube 44 via a peripheral conical web 58. The conical web 58 opens towards the thread 45. A peripheral flute 59 is provided on the side of the guide element 57 which faces away from the thread 45, into which flute a seal 60 is inserted. The guide element 57 has a through- opening 134, through which the tripping rod 26 is guided. WO 2006/089643 PCT/EP2006/001138 - 10 - The other end of the tube 44 protrudes out of the sealing body 41 and ends in an extension 61, which adjoins said sealing body in stepped fashion and whose outer diameter is greater than the outer diameter of the tube 44. A peripheral rim 63 of a bowl body 64, whose bottom 65 has a guide passage 66 for the tripping rod 56, bears against the step 62 formed by the extension 61. A flute 67, in which a seal 68 is introduced, is located on the outside of the bottom 66. Two approximately tubular spacer elements 69 and 70 are located between the carrier element 57 and the bottom 65, which spacer elements are guided at opposite ends by flange rims 71 and 72 within the tube 44 and bear against one another with the adjacent ends. The outer diameter of the flange rims 71, 72 corresponds to the inner diameter of the tubes 44. These spacer elements 69 and 70, with their flange rims 71 and 72, serve the purpose of absorbing any pressure forces which may occur and which also act inwards when the sealing body is compressed. The area 135, which is located between the flange rims 71 and 72 within the tube 44, is filled with insulating oil, which can also flow into the intermediate area between the spacer elements 69, 70 and the tripping rod 56 via radial openings 136, which are located at least in the spacer element 39. The bowl body 64 has, in the region of its free end, i.e. in the region of the peripheral rim 63, a bead 137 which protrudes radially outwards and, on the inner face of the extension 63, a peripheral inwardly protruding tab 138 is integrally formed; if the bowl body 64 is pressed into the interior of the tube 44, the bead 137 latches behind the peripheral tab 138, with the result that the bowl body 64 is fixed there. Furthermore, a peripheral flute 139, in which a seal 140 is located, is located in the bottom of the bowl body on its outer face, i.e. on its face facing the WO 2006/089643 PCT/EP2006/001138 - 11 - area 135. The seals 60, 68 and 140 serve the purpose of sealing the interior 135, with the result that the insulating oil located there is prevented from flowing out of the area 135, and are thus used for preventing any leaks. The sealing head 43, in which the extension 61 is located, has a passage opening 73, which, in the direction towards the sealing body 41, has a step 74, which interacts with the step 62 of the tube, a distance being provided between the two in the position illustrated. The tube 44, which consists of an insulating material, has a cone form on its outer face, which cone form tapers towards the fuse. A carrier plate 80 is located on the end of the sealing body 43 away from the fuse, and two disk springs 82 and 83 are located between the carrier plate 80 and the face 81 opposite it, which disk springs are under mechanical stress, i.e. are tensioned, in the position illustrated in figure 4 and press the sealing body 41 into the inner cone 40 of the insulating container 30 in the opposite direction to the arrow direction P. Instead of such disk springs, a helical spring arrangement may naturally also be provided. It is particularly important that the spring arrangement has a nonlinear characteristic, as illustrated in figure 6. The path length by which the spring is compressed is plotted on the horizontal axis, and the force which compresses the spring is plotted on the vertical axis. The characteristic K of the spring arrangement, as is desired, has a rise, which is reduced as the path length increases. As a result, in the event of a difference in path length us in the region in which the rise of the characteristic K is smaller, there is a WO 2006/089643 PCT/EP2006/001138 - 13 - In each case one post-like support 104, 105; 106, 107 and 108 and 109 is positioned perpendicularly on both sides of each opening 101 to 103, which supports each comprise two identical support elements 104a and 104b, which are at a distance from one another. The supports 105 to 109 are identical to the support 104 with the two support elements 104a and 104b. In each case one arm 110 and 111 of a handle arrangement 112, in this case only the handle arrangement 112 for the opening 101 is described, engages between the support elements of each support; the handle arrangement for the openings 102 and 103 have an identical design. The two arms 110 and 111 run approximately parallel to one another and together with two bent-back portions 113 and 114 arranged at an angle thereto, form a U shape; the bent-back portions 113 and 114 are provided (not visibly) on their ends pointing towards one another with further bent-back portions, which run parallel to the arms 110 and 111 and perpendicularly to the connecting line of the posts 104 and 105, these two bent-back portions as extensions being surrounded by a handle 115 consisting of insulating material. The length of the handles is dimensioned such that, in each position in which the handles 115 run parallel to the plate, they remain within the region which is delimited by side walls, with the result that the movement of the handles is not impeded by wall sections. The arms 110 and 111 are connected in articulated fashion to the posts 104 and 105 via rotating journals 116 and 117, with the result that the handle arrangement 112 can be pivoted from the position in which the arms run parallel to the plate 100 into a position in which the arms run perpendicularly to the plate, as is the case for the handle 115. The handles can naturally also be brought into a position in which WO 2006/089643 PCT/EP2006/001138 - 14 - they are pivoted through 180° with respect to the position illustrated in figure 5, with the result that the handles 115 protrude in the opposite direction to that which is illustrated in figure 5. The arms 110 and 111 each have a cutout 118 and 119/ the ends of the posts 104, 105 being slit in the form of a fork with a fork opening 120 and 121. The journals 84 and 85 of the sealing head 43 engage in a cutout 118 and pass through it and likewise engage in the fork opening 120, 121. In the position shown in figure 5, the handles press the journals 84, 85 into the interior of the insulating container via the cutouts 118, 119, as a result of which the disk springs 83, 82 are prestressed by a predetermined force, with the result that the sealing body 41 is likewise pressed into the inner cone face on the insulating body with a specific force, as a result of which electrical sealing is provided between the two cone faces. If the handles 115 are brought out of one end position into their other end position, the journals 84, 85 slide into the cutouts 118, 119 because they are fixed in their position by the fork opening 120 or 121 and, owing to the curved form of the cutouts 118 and 119, the journals 84, 85 and therefore the sealing head 43 are removed from the plate 100 in the arrow direction P (see figure 4), as a result of which the spring arrangement is relieved of tension, with the result that the force of pressure on the sealing body is reduced or dissipated such that the fuse can be removed in a simple manner. WO 2006/089643 PCT/EP2006/001138 - 15 - Once the fuse has been inserted into the interior of the insulating container, the movements of the handles are reversed. It has been described above that the sealing body 41 in its entirety consists of a soft-elastic material. It is naturally also possible for the sealing body to be produced from a rigid material and for only the outer cone face to be coated with a soft-elastic material. Similarly, it is naturally also possible for the sealing body to be produced from a rigid material and for the inner cone face of the insulating container to be coated with this material. In both cases, care naturally needs to be taken to ensure that, as in the embodiment shown in figure 4, the touching faces of the inner and outer cone are sealed over the entire axial length and over the entire radial circumference, with the result that there are no areas there in which discharges may result which can damage or destroy the sealing body and therefore the entire fuse arrangement. WO 2006/089643 PCT/EP2006/001138 - 16 - Patent claims 1. A fuse arrangement for a switchgear assembly, in particular for a medium-voltage switchgear assembly, having a cylindrical insulating container, which is open at a first end and consists of insulating material and into which a fuse cartridge or fuse can be inserted, whose first end is electrically conductively connected to a first contact arrangement at the first open end of the insulating container and whose second end is electrically conductively connected to a second contact arrangement in the region of the first end of the insulating container, characterized in that the fuse cartridge is fixedly connected at its first end to a closure apparatus for the insulating container which is arranged on the front side, preferably on the frame or on the front wall of the switchgear assembly, which closure apparatus has a sealing body (41), whose outer face (42) has an outer cone form tapering in the direction of the fuse and corresponding to a matched inner cone form (40) at the first end of the insulating container (30) , and a sealing head (43) connected to the sealing body (41) , and in that a spring arrangement (82, 83) is provided between the sealing body (41) and the sealing head (43), i.e. a spring arrangement (82, 83) is provided which exerts a force on the sealing body which presses it into the inner cone form of the insulating container (30) in the fitted position, the sealing head being arranged outside of the insulating body. 2. The fuse arrangement as claimed in claim 1, characterized in that the spring arrangement has a nonlinear spring characteristic. 3. The fuse arrangement as claimed in claim 1 or 2, characterized in that the spring arrangement is a disk WO 2006/089643 PCT/EP2006/001138 - 17 - spring arrangement and has at least one disk spring (82, 83) . 4. The fuse arrangement as claimed in one of the preceding claims 1 to 3, characterized in that at least one pair of springs comprising two disk springs (82, 83) is provided, the disk springs of .each pair of springs bearing against one another at their inner edges and bearing against the sealing body or the sealing head with their outer edges. 5. The fuse arrangement as claimed in one of the preceding claims, characterized in that the sealing body (41) consists at least partially of a soft-elastic material, for example silicone rubber. 6. The fuse arrangement as claimed in claim 6, characterized in that a soft-elastic layer for sealing purposes is provided on the inner cone form and/or on the outer cone form. 7. The fuse arrangement as claimed in one of the preceding claims, characterized in that the sealing head and the sealing body are capable of moving slightly in relation to one another for the purpose of tensioning and detensioning the spring arrangement, the movement being delimited by a step-shaped integral formation on the sealing head or on a holding element connected to the sealing body. 8. The fuse arrangement as claimed in one of claims 1 to 4, characterized in that, at least in the case of a sealing body consisting of a soft-elastic material, a plate is attached to the end face facing the sealing head, which plate transfers the force of the spring arrangement onto the spring body. WO 2006/089643 PCT/EP2006/001138 - 18 - 9. The fuse arrangement as claimed in one of the preceding claims, characterized in that the sealing head (43) is coupled to a lever arrangement, and the sealing head can be brought from a position in which the spring arrangement is tensioned into a position in which the spring arrangement is relieved of tension, and back again. 10. The fuse arrangement as claimed in one of claims 1 to 8, characterized in that a holding arrangement, which has a tulip-shaped finger arrangement located on a circular circumference, is fitted to the fuse-side end of the sealing body, with which holding arrangement the first end of the fuse is mechanically and fixedly connected. 11. The fuse arrangement as claimed in claim 10, characterized in that the inner diameter of the finger arrangement can be reduced by means of a tensioning element, with the result that the fuse is held fixedly at its first end in the finger arrangement. 12. The fuse arrangement as claimed in one of the preceding claims, characterized in that the sealing head has two bolt pins which protrude in the opposite direction and interact with the lever arrangement. 13. The fuse arrangement as claimed in one of the preceding claims, characterized in that a tube arrangement (44) is integrally formed within the sealing body, which tube arrangement engages in the sealing head (43) and has an extension there, which engages in a corresponding extension on the sealing head (43), with the result that, when the sealing head is removed from the sealing body, the sealing head, via this step-like extension, takes the tube and therefore the sealing body with it. WO 2006/089643 PCT/EP2006/001138 - 19 - 14. The apparatus as claimed in one of the preceding claims, characterized in that the lever arrangement has a U shape with two parallel running arms for each fuse pole, the web sections of said arms being connected to one another and being provided with a handle, in that the arms of the lever arrangement are positioned between two connectors, which are mounted rotatably on both sides of a through-opening in the plate for the fuse, and in that the arms have a cutout, which forms a cam and into which the journals engage on the sealing head and are guided therein. 15. The apparatus as claimed in one of claims 1 to 13, characterized in that the lever arrangement has a U shape with two parallel running arms and a web running transversely with respect thereto for each fuse pole, in that the arms of the lever arrangement are positioned between two connectors, which are mounted rotatably on both sides of a through-opening in the plate for the fuse, and in that the arms have a cutout, which forms a cam and into which the journals on the sealing head engage and are guided therein, and in that the web acts as a handle. 16. The apparatus as claimed in either of claims 14 and 15, characterized in that the length of the arms is dimensioned such that the lever arrangement can be pivoted through 180° without its movement being impeded by parts of the switchgear assembly. Safety arrangement for a switchgear assembly, having a cylindrical insulating container, which consists of insulating material and is open at a first end, and into which a fuse cartridge or fuse can be inserted, the first end of said fuse cartridge or fuse being electrically conductively connected to a first contact arrangement and the second end being electrically conductively connected to a second contact arrangement. The fuse cartridge is fixedly connected at its first end to a closure apparatus for the insulating container, which closure apparatus has a sealing body (41) and a sealing head (43) connected to the sealing body (41). A spring arrangement (82, 83) is provided between the sealing body (41) and the sealing head (43).

Documents:

02710-kolnp-2007-abstract.pdf

02710-kolnp-2007-claims.pdf

02710-kolnp-2007-correspondence others.pdf

02710-kolnp-2007-description complete.pdf

02710-kolnp-2007-drawings.pdf

02710-kolnp-2007-form 1.pdf

02710-kolnp-2007-form 2.pdf

02710-kolnp-2007-form 3.pdf

02710-kolnp-2007-form 5.pdf

02710-kolnp-2007-international publication.pdf

02710-kolnp-2007-international search report.pdf

02710-kolnp-2007-pct request form.pdf

02710-kolnp-2007-priority document.pdf

2710-KOLNP-2007-(03-01-2013)-CORRESPONDENCE.pdf

2710-KOLNP-2007-(24-11-2014)-ABSTRACT.pdf

2710-KOLNP-2007-(24-11-2014)-ANNEXURE TO FORM 3.pdf

2710-KOLNP-2007-(24-11-2014)-CLAIMS.pdf

2710-KOLNP-2007-(24-11-2014)-CORRESPONDENCE.pdf

2710-KOLNP-2007-(24-11-2014)-FORM-1.pdf

2710-KOLNP-2007-(24-11-2014)-FORM-2.pdf

2710-KOLNP-2007-(24-11-2014)-OTHERS.pdf

2710-KOLNP-2007-(24-11-2014)-PETITION UNDER RULE 137.pdf

2710-KOLNP-2007-CORRESPONDENCE OTHERS 1.1.pdf

2710-KOLNP-2007-CORRESPONDENCE-1.1.pdf

2710-kolnp-2007-form 18.pdf

2710-KOLNP-2007-GRANTED-FORM 1.pdf

2710-KOLNP-2007-GRANTED-SPECIFICATION-COMPLETE.pdf

2710-KOLNP-2007-OTHERS.pdf

2710-KOLNP-2007-PA.pdf

2710-KOLNP-2007-PRIORITY DOCUMENT.pdf

abstract-02710-kolnp-2007.jpg