Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/10—Adaptation for built-in fuses
  • H01H9/104—Adaptation for built-in fuses with interlocking mechanism between switch and fuse
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H1/00—Contacts
  • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
  • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
  • H01H1/20—Bridging contacts

Definitions

• Invention belongs to the field of electricity, namely to basic electric elements, in particular to details of switching devices comprising built-in fuses and means for preventing arc.
• the purpose of the invention is to conceive a protective electric switch with a melting member, which will be without amending its overall shape and dimensions adapted for mounting on commonly used bearing ledges of distribution panels in relevant electric circuits, and which should be able to receive a standardized essentially cylindrically shaped melting member, which could be quickly and easily inserted or removed during replacement thereof, while on the one hand each integration of such switch into each disposable electric circuit via each melting member inserted within the switch will be enabled exclusively when the casing is completely closed, wherein on the other hand the access towards the interior of the casing and in particular towards the melting member will be physically enabled only upon the electric circuit throughout the switch has been interrupted.
• Electric switch as described in SI 2013 IA consists of a casing, in which a bearing member of a melting member is mounted pivotally around its pivot axis.
• the melting member which is placed on said bearing member, may then be pivoted around said pivot axis either towards the interior of said casing, where it is put in contact with corresponding electric contact members, or towards the exterior of the casing in such position that replacing of the melting member with a supplemental one is allowed.
• the shape and dimensions of such casing correspond to usual ones, which enables mounting thereof onto standardized ledges, which are available in distribution panels of electric circuits.
• each of these contact members cooperating with the melting member as long as available within the casing consists of electric conductive metal plate, which is bent into essentially semi-circular hook, so that the overall shape thereof essentially corresponds to the Greek letter ⁇ (omega), so that a cylindrical electric conductive surface, which is available on each end portion of the melting member, is then inserted between each pair of arms of each contact member.
• Each of said contact member usually consists of copper and is preferably plated with silver, wherein said copper is relatively plastic and is therefore difficult to assure a desired elasticity for the purposes of retaining the melting member in place by simultaneously maintaining a perfect electric contact between the surface of the contact member and the surface of the melting member.
• a switch is described in DE 28 18 360 C3 as well as in EP 1 224 677 B 1 , in which a receiving chamber for a melting member is foreseen, in which two electric contact members are integrated, which co-operate with corresponding electric conductive bases of said melting member.
• a cover is foreseen on said casing, which may be pivoted from its closed position, in which it is placed over the melting member in order to disable accessing thereof, into its opened position, which is inclined at approximately 90° with respect to previously mentioned position, or vice versa.
• An interrupter is moreover foreseen within said casing, which is intended for interruption of the electric circuit during pivoting said cover from its closed into its opened position, which is after that during pivoting said cover in the opposite direction automatically re-established.
• Said interrupter consists of an electric conductive plate, which is on the one hand supported by appropriate spring and on the other hand rest to two electric conductive parts, which are located apart from each other and may be electrically interconnected via said plate.
• Said cover is furnished adjacent to its pivoting axis furnished with a rod, which is arranged adjacent to its pivoting axis and is guided within appropriate guide and rest on said plate.
• the present invention refers to a protective electric switch with a melting member, wherein such switch comprises a casing, which consists of an electric insulation material and is furnished with electric connectors, which are adapted to connect said switch into each disposable electric circuit, as well as a bearing member adapted for bearing said melting member, which is placed within said casing and also consists of an electric insulation material.
• Said melting member is preferably a standardized cylindrically shaped fuse, which is furnished with electric conductive bases, which are located on its end portions.
• Two electric conductive contact members are foreseen within said casing, which are appropriately arranged and adapted to receive said melting member, such that each of them is adapted to receive just one of said bases of the melting member and is at the same time electrically interconnected with each corresponding connector on the casing, provided that said interconnection of at least one of them is established via appropriate interrupter, by means of which the electric circuit within the casing through said connectors and the contact members via said melting member may be interrupted, when desired.
• the bearing member comprises a guiding chamber, into which the melting member is insertable in its axial direction.
• the interrupter consists of an electric conductive plate, which is supported by a spring, by means of which said plate is pressed in a direction towards one of the connectors and simultaneously also towards one of corresponding contact members, which is adapted to establish appropriate contact with each belonging base of the melting member.
• Said spring is preferably a compression helical spring.
• each contact member which is interconnected with each corresponding connector on the casing and is moreover adapted to receive a corresponding base of the melting member, consists of an electric conductive metal plate, which is bent into form of letter U, wherein the contact member, which is arranged closer to the interrupter, is deflected towards the back surface of the casing, which is furnished with attaching means, while the other contact member is deflected in the opposite direction.
• appropriately rigid crank which is by means of its one end portion rest on the elastically supported contact plate of the interrupter, on its another end comprises two coaxially apart from each other protruding guiding pins, which are on the one hand adapted to cooperate with corresponding guiding seats on the protective cover, which are available in form of V-shaped and with respect to the pivoting axis of the cover eccentrically arranged recesses, and on the other hand each per se inserted within each corresponding guiding groove on each corresponding inner surface of each lateral wall of the casing, so that by closed protective cover said pins are located in their first stable position within said guiding seats and the crank allows resting of the contact plate of the interrupter on the corresponding contact member as well as on the connector due to the pressure of the spring, while by opened protective cover said pins are located in their second stable position in the end portion of the guiding groove, by which the crank is shifted in a direction towards the contact plate of the interrupter and said plate is maintained apart from corresponding connector and corresponding contact member by withstanding the pressure of
• the protective cover is furnished in the area of its pivoting axis on the bearing member with two oppositely apart from each other protruding pins, which are each per se furnished with two oppositely arranged and at least approximately parallel with respect to each other extending cutoffs, wherein said pins are inserted into corresponding guiding grooves, which are available on inner surfaces of both lateral walls of the casing, wherein the width and the shape of said grooves are determined in such a manner that the width of each groove in the area of the pivoting axis of the cover on the bearing member is greater than the diameter of each pin and outside of the area of said pivoting axis smaller than the diameter of said pin, while the shape of said grooves essentially correspond to a circular arc having radius in the pivoting axis of the bearing member on the casing, so that each pin is together with cutoffs pivotally embedded within the pivoting axis on the bearing member, while the bearing member is allowed to be pivoted around its pivoting axis exclusively in situation when the cover is shifted into its opened position
• said cover comprises two apart from each other protruding guiding pins, while in the casing appropriate guide is foreseen on each lateral wall, with which each corresponding pin co-operates, wherein each guide together with each belonging pin determines the possibility of movement of the cover placed on the bearing member within the casing and herewith consequently the possibility of movement of the cover relatively to the bearing member as well as of the cover together with the bearing member relatively to the casing.
• Said guide preferably comprises two lateral areas, which are deflected apart from each other, and in that by pivoting the cover each guiding pin cooperates with one lateral area and by pivoting the bearing member with another lateral area.
• At least one passage is foreseen on the bearing member as well as on the protective cover, which is intended for establishing appropriate connection of said bearing member with at least one bearing member of at least one neighboring switch as well as of said cover with at least one cover of at least one neighboring switch in a multi- polar switching device.
• at least one sealing passage may also be foreseen on the bearing member and/or the cover.
• Fig. 1 is a front view of a protective electric switch in its closed state
• Fig. 2 is a cross-section along the plane II - II according to Fig. 1 ;
• Fig. 3 is a top view of a protective electric switch in its opened state
• Fig. 4 is a cross-section along the plane IV - IV according to Fig. 3;
• Fig. 5 is again a top view of a protective electric switch in its closed state
• Fig. 6 is a cross-section along the plane VI - VI according to Fig. 5 in its closed position
• Fig. 7 is a cross-section along the plane VI - VI according to Fig. 5 in its partially opened position
• Fig. 8 is a cross-section along the plane VI - VI according to Fig. 5 in its completely opened position.
• a protective electric switch according to the invention comprises a casing, in which a standardized melting member 4 is located on appropriate bearing member 2, which is furnished with a protective cover 3.
• Said melting member 4 is cylindrically shaped and is furnished with two electric conductive bases 41, 42, which are located on both end regions thereof and are electrically interconnected by means of a not-shown electric conductive melting filament of each pre-determined electric resistance, so that said electric interconnection between said cups 41, 42 is interrupted due to melting of said filament of the melting member 4 as soon as each pre-defined electric current occurs.
• the casing 1 as such is generally available in standardized overall dimensions and consists of an electric insulation material, while on the back surface 10' thereof there are appropriate attaching means 11, 12 for reliable temporary or permanently attachment thereof onto each disposable ledge or similar bearing member, which is present in each distributing panel, and which is well-known to those skilled in the art and is therefore not shown in more detail in the enclosed drawing.
• said casing 1 is furnished with appropriate electric connectors 13, 14, namely with an input connector 13 and an output connector 14, which are adapted to cooperate with appropriate electric wires, which are also not shown in the drawing and belong to each corresponding electric circuit and, into which the switch according to the invention may be integrated when desired, upon which then such circuit is secured against overloading by means of such protective switch.
• Each of said connectors 13, 14 is electrically interconnected with a corresponding contact member 15, 16, which is located within said casing 1 and is adapted to cooperate with said electric conductive bases 41, 42 of the melting ember 4, when this last is correctly inserted into the switch according to the invention and the switch is ready for establishing an electric circuit arranged there-through.
• the input connector 13 is electrically interconnected with each corresponding contact member 15, which is in this particular embodiment available in form of a piece of an electric conductive metallic plate, which is bent in the form of letter U and is moreover deflected in a direction away from said back surface 10' of the casing 1, so that between two arms thereof each corresponding base 41 of the melting member 4 can be inserted in order to establish a desired electric contact between the melting member 4 and the input connector 13 on the casing 1 of the switch.
• the outlet connector 14 on the casing 1 of the switch according to the invention is by means of interrupter 17 electrically connected to the second contact member 16, which is in this particular embodiment formed quite similar like the previously mentioned connector 13 and similarly consists of a piece of electric conductive plate, which is bent into shape of letter U and deflected in a direction opposite to the back surface of the casing and is as such adapted to receive the second base 42 of the melting member 4, so that the melting member 4, when correctly inserted into said casing 1, is then via the interrupter 17 electrically interconnected with the previously mentioned outlet connector 14 on the casing 1.
• the interrupter 17 consists of a relatively rigid electric conductive plate 171, which is supported by a spring 172, which is in this particular embodiment a compression helical spring, by means of which said plate 171 is then pressed towards the outlet connector 14 and corresponding contact member 16, so that electric interconnection between them is established by means of said plate, which may optionally also be interrupted by pressing the plate 171 in the opposite direction against the force of said spring 172.
• a spring 172 which is in this particular embodiment a compression helical spring, by means of which said plate 171 is then pressed towards the outlet connector 14 and corresponding contact member 16, so that electric interconnection between them is established by means of said plate, which may optionally also be interrupted by pressing the plate 171 in the opposite direction against the force of said spring 172.
• said connector 14 is therefore furnished with a contact surface 141, and said contact member 16 is similarly furnished with a contact surface 161, so that the plate 171 in its position adapted for establishing each corresponding electric interconnection between the connector 14 on the casing 1 and the contact member 16 adapted to co-operate with the melting member 4, is simultaneously rest in the area of both previously mentioned contact surfaces 141, 161.
• a bearing member 2 of the melting member 4 is mounted within the casing 1.
• the melting member 4 is axially inserted into a guiding chamber 21 , which is an integral part of said bearing member 2.
• the bearing member 2 is furnished with a protective cover 3 and is pivotally embedded within the casing 1 in order to be pivoted around its pivot axis 20, which is however possible only under provision, when prior to that the protective cover 3 has been pivoted from its closed position according to Figs 1 - 6 into its opened position according to Figs 7 and 8 around its pivot axis 30, which is located on the bearing member 2.
• Said protective cover 3 is furnished with two guiding seats 31, which are arranged on both lateral surfaces thereof, and in this particular embodiment each of them is formed as a V-shaped recess arranged eccentrically with respect to said pivot axis 30, around which the cover 3 is pivoted relatively to the bearing member 2.
• a correspondingly rigid crank 33 is furnished with coaxially arranged and oppositely each apart another protruding guiding pins 32, which are each per se inserted into each corresponding guiding seat 31, wherein said crank 33 is thanks to said guiding pins simultaneously inserted into appropriate guiding grooves 104, which are available on the internal surfaces of lateral walls 101, 102 of the casing 1, and supported by the elastically supported plate 171 of the interrupter 17.
• crank 33 When the length of said crank 33 is determined in an appropriate manner and the cover 3 is shifted into its closed position (Fig. 1 - 6), said crank 33 is supported by the plate 171, which is by means of the spring 172 pressed towards the contact surfaces 141, 161 of the input connector 14 and the contact member 16, so that electric interconnection between the connector 14 and the contact member 16 is established.
• opening of the protective cover 3 occurs, namely when the cover 3 is pivoted around its pivot axis 30 from its position according to Fig.
• said guiding pins 32 of the crank 33 are moved from the initial and stable position thereof according to Figs 1 - 6 into another stable position in the end area 104' of the guiding grooves 104 (Figs 7 and 8), where these then remain engaged due to compression of the spring 172, until by each subsequent pivoting of the cover 3 into its closed position they are returned back to their initial position by means of the guiding seats 31.
• the contact plate 171 is permanently exposed to compression of the crank 33 and is therefore all the time held apart from corresponding contact surfaces 141, 161.
• the cover 3 comprises two guiding pins 34, which protrude apart from each other, and each of them is furnished with two diametrically opposite arranged cut-offs 341, 342, which extend at least approximately parallel with respect to each other, wherein each of said pins 34 is inserted within a corresponding guiding groove 103 located on the inner surface of each corresponding lateral wall 101, 1092 of the casing 1.
• said cover 3 comprises two further guiding pins 35, which also protrude apart from each other and are adapted to co-operate each per se with corresponding guides 18, which are available on lateral walls 101, 102 of the casing 1.
• Each guide 18 is shaped as shown in Figs 6, 7 and 8 and herewith enables guiding of each corresponding pin 35 and also determines a possibility of moving the bearing member 2 relatively to the casing 1 and simultaneously also the possibility of moving the cover 3 relatively with respect to the bearing member 2 or also together with the bearing member 2 relatively with respect to the casing 1 from its position according to Fig. 6 via its position according to Fig. 7 into position according to Fig. 8 or vice versa.
• said pins 35 are located in one lateral area 18' of said guide, while during pivoting the bearing member 2 they are mobbed along the other lateral area 18" of said guide 18 from the position according to Fig. 7 into their end position according to Fig. 8.
• the electric circuit is automatically interrupted as soon as the cover 1 is shifted into its opened position, when said crank 33 is moved from its first stable position according to Figs 6 into another stable position in the end area 104' of the guiding groove 104, and remains interrupted until that moment, when the cover 3 is shifted back to its closed position, by which the guiding seats 31 allow the crank 33 to be returned into its initial position, in which the contact plate 171 of the interrupter 17 is by means of spring 172 returned into a position of resting on the contact surfaces 141, 161 in order to re-establish the electric circuit throughout the electric conductive elements 13, 14, 15, 16, 171 and the melting member 4, 41, 42.
• the present invention moreover provides at least one sealing bore 290, 390, which is available on the bearing member and/or the cover 3, so that appropriate sealing of the switch either in active or inactive state thereof is enabled, and moreover also sealing of the melting member 4 as such in the closed state of the switch.
• the invention provides also for at least one passage 29, 39 on the bearing member 2 and on the cover 3, through which appropriate (not shown) rods can be inserted, which are intended for establishing physical interconnection among several bearing members 2 and covers 3 in appropriate set of said switches, which may then form a multi-polar switching device.

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• Thermally Actuated Switches (AREA)
• Fuses (AREA)

Priority Applications (1)

Applications Claiming Priority (4)

Publications (1)

Family

ID=42035281

Family Applications (1)

Country Status (3)

Cited By (1)

Citations (7)

• 2009
  • 2009-02-24 SI SI200900049A patent/SI22960A/sl not_active IP Right Cessation
  • 2009-12-30 EP EP09810894A patent/EP2387789A1/en not_active Withdrawn
  • 2009-12-30 WO PCT/SI2009/000068 patent/WO2010082905A1/en active Application Filing

Patent Citations (7)

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