EP2089893A1 - Dispositif de protection contre les surintensités à utiliser dans des appareils de protection contre les surtensions à tensions nominales élevées - Google Patents
Dispositif de protection contre les surintensités à utiliser dans des appareils de protection contre les surtensions à tensions nominales élevéesInfo
- Publication number
- EP2089893A1 EP2089893A1 EP08838752A EP08838752A EP2089893A1 EP 2089893 A1 EP2089893 A1 EP 2089893A1 EP 08838752 A EP08838752 A EP 08838752A EP 08838752 A EP08838752 A EP 08838752A EP 2089893 A1 EP2089893 A1 EP 2089893A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- overcurrent protection
- protection device
- series
- connection
- fuses
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000758 substrate Substances 0.000 claims description 20
- 230000001681 protective effect Effects 0.000 claims description 19
- 239000002131 composite material Substances 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 10
- 238000010304 firing Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 5
- 238000005476 soldering Methods 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 230000006870 function Effects 0.000 description 9
- 238000000926 separation method Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 238000009795 derivation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010943 off-gassing Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/30—Means for indicating condition of fuse structurally associated with the fuse
- H01H85/303—Movable indicating elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/44—Structural association with a spark-gap arrester
Definitions
- the invention relates to an overcurrent protection device for use in surge protection devices with high rated voltages in combination with a mechanical release for a display and fuses for overload protection according to the preamble of claim 1.
- Overvoltage protection devices are used in electrical and information technology networks to protect equipment, consumers and end devices. Such overvoltage protection devices limit in particular transient Studentsspannu ngsereignissen, z. B. lightning events, the voltage to uncritical values. In the case of overvoltage events, the limitation is made by the derivation of pulse currents in the cross-path and thus generally in parallel with load connections. As overvoltage protection elements z. As spark gaps, varistors, Gasabieiter, non-linear resistors and their combinations used.
- overvoltage protection devices with higher rated voltages The need for overvoltage protection devices with higher rated voltages is limited.
- the effort to develop and manufacture a special geometry of overvoltage protection elements, in particular spark gaps, as well as corresponding ignition devices and housing parts for each rated voltage level is very high.
- the requirements for the protection and display devices of Hilfszünd Vietnameseen for arresters with higher rated voltages are very large. This applies in addition to the separation distances, d. H. the creepage distances and clearances, including the magnitude of the rated voltage and the switching capacity of the protective devices of Hilfszünd Vietnamesees, ie the corresponding electrical circuit.
- the response of a fuse is often used as a display criterion for the overload and the separation of the overvoltage protection element. For this purpose, the power interruption or the increased voltage drop across the fuse is evaluated.
- the electrical Signal also used for audible indicators or the opening and closing of switches for remote indication.
- the spark gap should be able to exert a reductive protective function with an increased protection level without the aid of an ignition aid.
- the derivation of a display function from the turn-off of fuses is also known from DE 38 31 935 Al, DE 197 51 470 Al or DE 32 28 471 Al already known.
- US Pat. No. 6,157,529 discloses interrupting a circuit by shutting off a fuse and a holding coil of a switch.
- Ignition aids as described in DE 199 14 313 Al, are also used in combination arresters. With these arresters, the starting aid itself can be designed as an independent overvoltage protection device, which activates the short-circuit element, generally a spark gap, only at the risk of its own overload via a trigger function.
- a combined arrester is shown for example in DE 198 38 776 C2.
- the basic idea of the invention is therefore to divide the fuse elements, in particular fusible elements, into a series connection of a plurality of fuses, which, in addition to the electrical connection, are partially in a mechanical series connection and partly in a mechanical parallel connection.
- the division also allows a large variance in terms of residual voltage behavior, rollover protection, current limitation, the actual performance and the necessary distances to vulnerable other components, in particular a trigger circuit.
- a series connection of a plurality of fuse elements is provided which form a geometrically predetermined, mechanical and electrical connection.
- this series connection has a mechanical and electrical parallel connection of fusible elements, wherein at least one of the fusible elements of the parallel connection comprises a firing pin as a mechanical trigger for actuating a function display.
- a first part of the series combination is located on one side of a wiring substrate, in particular a printed circuit board, and a second part of the series compound is located on a second, the first opposite side of the wiring substrate.
- the first part of the series composite comprises at least two cylindrical individual fuses, which are mechanically and electrically connected by a conductive cylinder on the end faces and connecting caps present there. This mechanical and electrical connection with the help of the conductive The cylinder is only in the area of the mechanical terminal caps, so that the insulation and separation distances are maintained.
- the composite of the cylindrical individual fuses with the conductive connecting cylinder may be coated by an insulating material, in particular by a shrink tube.
- the second part of the series network comprises the already mentioned parallel network, wherein the parallel network is predominantly surrounded by a protective housing to which further functions, which are described below, can be assigned.
- connection caps of the fusible elements of the parallel connection are electrically and mechanically connected and merge into a connection extension, which in each case allows mounting on the wiring carrier.
- the free ends of the individual fuses of the first part of the series composite also have connection caps with Lötfähnchen or tab-like extensions.
- a conductive, in particular metallic, geometrically diameter-matched cylinder may also have a predetermined impedance.
- the wiring carrier has an elongate, rectangular shape with screw connection lugs attached to the narrow sides.
- the first part of the series composite is at a longitudinal outer edge, with this substantially laterally terminating, located on the wiring carrier.
- the second part of the series composite containing the parallel connection, is arranged essentially at right angles to the longitudinal axis of the first part of the series combination on the wiring carrier.
- the protective housing is open to the longitudinal edge of the wiring substrate to allow exit of the firing pin and an operative connection of the firing pin to a spring-biased indicator slide.
- the protective housing has on its upper side facing away from the wiring substrate a color-coded indicator surface or an indicator surface extension, which is integrally formed on the housing.
- a functional state can be displayed by a slide either the view of the top releases or blocks this view.
- the protective housing on the one hand, the function of the isolation of the parallel compound and serves the purpose of retaining elements in the event of triggering this fuse. Furthermore, the housing serves for the aforementioned formation of an indicator surface or the reception of an indicator surface extension.
- the wiring carrier is preferably mountable on the upper side of a housing, wherein the housing accommodates in its interior an arrangement of surge arresters, in particular spark gaps.
- This arrangement of surge arresters, in particular spark gaps is in series connection.
- One of the spark gaps of the device may be triggerable, in which case the trigger circuit is on the wiring carrier.
- the housing for receiving the spark gaps has on its upper side over a longitudinal edge a trough-like recess, in which the first part of the series compound dips, in order to effect a protective and insulating function of the first part of the series compound.
- the overall arrangement of spark gaps mounted in the housing, wiring substrates with electrical elements located on top of the housing, and the series connection of multiple fuses is surrounded by an insulating cap, wherein the cap has the aforementioned window for detecting the functional state with respect to the indicator surfaces.
- the inventive overcurrent protection device is characterized by a modular design with selected fuses for series connection, to effect a slight adaptation to different Liche nominal voltages.
- the display slider which is spring-biased and can be released from the firing pin of the parallel connection, has a display surface which releases or obscures a color-deviating indicator surface, in particular the indicator surface of the top of the protective housing.
- the display slider has an extension, which extends in the longitudinal direction beyond the narrow side of the wiring substrate, in order to interact there with a telecommunications contact in operative connection.
- the usable in the series circuit of the overcurrent protective device fuses consist of inexpensive to produce individual fuses, each z. B. for a voltage level of 250 V.
- the cylinder may preferably be a metal cylinder which, in addition to the electrical connection, also assumes the mechanical fixing and the necessary mechanical stabilization of the corresponding part of the series connection.
- the number of connection elements is smaller by this type of connection than in a simple series connection of individual electrical fuses, each z. B. connected by soldering to a circuit board.
- connection elements or end caps of the fuses The distance between the remaining connection elements or end caps of the fuses is considerable, which makes it easier to maintain separation distances and significantly reduces the risk of bridging.
- the preferred arrangement of the above-described series connection on the underside of the wiring substrate creates in addition to sufficient Trennu ngs- distances on the wiring substrate and space on the component side, d. H. the opposite side, on the one hand on the volume savings and on the other hand by avoiding critical approximations between the overload-endangered elements and the protective device.
- the series connection of the fuses provides a further advantage, which is that two connection legs or connection feet are saved in the board, due to the connection of the partial fuses with a conductive, in particular brass sleeve.
- the first part of the series connection is separated at the top by the board from the components of the ignition circuit and on the bottom by the trough-like expression of the housing. This results in a quasi a complete insulating enclosure of the protective device. This prevents in the event of an error Berußung that may occur, and it will protect the separation sections of the ignition circuit when the release of gas or plasma from the fuse from flashovers.
- the second part of the series connection representing Parallelverbu ndan extract is preferably configured as described in the German patent application DE 10 2006 026 711.7.
- the content of this patent application is hereby fully explained by the subject of the present invention.
- the fuses used as fuses of the parallel connection and also of the series combination preferably have the same fusible conductor at maximum rated voltage. This ensures an almost simultaneous response of all fuses for adiabatic loads and loads in which the axial heat dissipation dominates over the radial heat output.
- the characteristic of the series connection of the fuses thus corresponds to a partial area fuse.
- the dimensions of such a series connection are considerably smaller with comparable switching capacity than individual fuses, z. B. for a nominal voltage of 690 V.
- space saving allows the division of the fuse into several subunits also a very flexible arrangement of the individual functional units based on the position and location with respect to the wiring substrate.
- one or more fuses of the series assembly can be replaced by a simple metallic cylinder. In addition to the cost reduction, this also leads to a reduction in the residual stress and thus supports the desired diversion energy function.
- a two-sided arrangement of Metalizylindern in addition to a real fuse in the series combination also the current force effect can be reduced to the fusible conductor, whereby higher pulse currents can be supported.
- FIG. Figures 1 and 2 are an illustration of the first part of the series of fuses
- Fig. 3 is a plan view of the housing with enclosed
- Fig. 4 is a side view of an assembly with housing as well
- Wiring carrier which u. A. the trigger circuit and the overcurrent protection device receives
- u nd Fig. 5 is a representation similar to that of Fig. 4, but in perspective.
- the overcurrent protection device comprises a series connection of a plurality of fuse elements, which form a geometrically predetermined, mechanical and electrical composite.
- a first part of the series composite comprises two individual cylindrical fuses 1 and 2. These two cylindrical individual fuses 1 and 2 are mechanically and electrically, for example by means of a conductive, preferably metallic cylinder 3 on the end faces 4 and 5 there existing connection caps. B. connected by clamping or soldering.
- the resulting composite of the cylindrical individual fuses 1 and 2 with the connecting cylinder 3 is coated with an insulating shrink tube 6 (see Fig. 2).
- the free ends of the individual fuses 1 and 2 likewise have connecting caps 5, but with soldering lugs 5 a, which serve for electrical connection and mechanical fixing on a printed circuit board.
- the series connection according to the invention further comprises a mechanical and electrical parallel composite of fusible elements, wherein at least one of the fusible elements of the parallel composite has a firing pin as a mechanical trigger.
- the mechanical release can be designed as a wire-shaped release part, whereby preferably this wire of the release part is connected in parallel over a part of the entire overcurrent protection device, which has the advantage that the coordination of the current commutation and the switching capacity is limited to this part of the protection.
- the fuse conductor of the indicator fuse would have to have full switching capability, which is possible but leads to higher costs.
- the fusible link of the fuse to which the indicator is connected in parallel may be provided with a minimally lower melt temperature to ensure a safe indication even at low overloads.
- the indicator part i. H. the parallel connection, with an additional housing 7 (see FIGS. 4 and 5) provided.
- This housing 7 blocks the external flashover and reduces the risk that can be caused by released indicator parts (firing pin), considerably.
- the housing 7 is preferably arranged at right angles to the longitudinal axis of the wiring substrate 8.
- the first part of the series assembly 9, comprising the individual security with connection cylinder and protective cover, is located on the underside of the wiring substrate 8, wherein the second part of the series compound, which is located in the housing 7, is arranged on the upper side of the wiring substrate 8.
- the wiring carrier 8 has an elongated, rectangular shape with screw connection lugs 10 attached to the narrow sides, wherein the first part of the series assembly 9 is located at a longitudinal outer edge, substantially laterally terminating therewith.
- the protective housing 7 is open to the longitudinal edge of the wiring substrate 8, to an outlet of the firing pin therein and a Enable operative connection to a spring-biased indicator slide 11.
- the protective housing 7 has on its upper side remote from the wiring carrier 8 a color-coded indicator surface 18, z. B. red, or has an indicator surface extension, which extends from the housing 7 starting.
- the wiring support 8 is mountable on the upper side of a housing 12, wherein in the housing 12 there may be a series-connected spark gap arrangement.
- At least one spark gap of the spark gap arrangement can be triggered and the trigger circuit can be located on the wiring substrate.
- the contacting between the wiring carrier and the spark gap to be triggered can take place via a contact spring which extends through a recess 13 in the housing 12.
- spark gap housing 12 has on its upper side a trough-like recess 14, in which the first part 9 of the series compound dips to effect a protective and insulating function (see FIGS. 3 and 4).
- the overall assembly may be surrounded by an insulating cap, the cap having a viewing window to allow a view of the top of the housing 7 and the display slider 11, respectively.
- the display slider 11 has a display surface 15. This display area can, for. B. have a green color, which signals the state "OK".
- the display slider 11 also has an extension 16, which extends in the longitudinal direction over the narrow side of the wiring substrate 8, to connect with a telecommunications contact 17 in operative connection.
Landscapes
- Fuses (AREA)
- Emergency Protection Circuit Devices (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007049320 | 2007-10-15 | ||
DE102008049470A DE102008049470A1 (de) | 2007-10-15 | 2008-09-29 | Überstromschutzeinrichtung für den Einsatz in Überspannungsschutzgeräten mit hohen Nennspannungen |
PCT/EP2008/063767 WO2009050153A1 (fr) | 2007-10-15 | 2008-10-14 | Dispositif de protection contre les surintensités à utiliser dans des appareils de protection contre les surtensions à tensions nominales élevées |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2089893A1 true EP2089893A1 (fr) | 2009-08-19 |
EP2089893B1 EP2089893B1 (fr) | 2011-06-22 |
Family
ID=40459158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08838752A Not-in-force EP2089893B1 (fr) | 2007-10-15 | 2008-10-14 | Dispositif de protection contre les surintensités à utiliser dans des appareils de protection contre les surtensions à tensions nominales élevées |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2089893B1 (fr) |
AT (1) | ATE514177T1 (fr) |
DE (1) | DE102008049470A1 (fr) |
WO (1) | WO2009050153A1 (fr) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH238916A (de) * | 1944-02-26 | 1945-08-31 | Sprecher & Schuh Ag | Sicherungseinrichtung für Überspannungsableiter mit spannungsabhängiger Charakteristik. |
US2504804A (en) * | 1948-12-11 | 1950-04-18 | Northern Electric Co | Electrical protective apparatus |
US3889222A (en) * | 1973-11-07 | 1975-06-10 | Tokyo Shibaura Electric Co | Surge voltage absorber |
DE3228471C2 (de) | 1982-07-30 | 1985-03-07 | Dehn + Söhne GmbH + Co KG, 8500 Nürnberg | Überspannungsschutzgerät |
US6157529A (en) | 1984-10-24 | 2000-12-05 | Ahuja; Om | Basic surge protector |
DE3831935A1 (de) | 1988-09-20 | 1990-03-29 | Dehn & Soehne | Ueberspannungsschutz |
DE19751470C2 (de) | 1997-11-21 | 1999-12-23 | Quante Ag | Überspannungsschutzvorrichtung |
DE19838776C2 (de) | 1998-08-26 | 2002-01-10 | Dehn & Soehne | Verfahren und Anordnung mit einem zwei-stufigen Überspannungsschutz in Niederspannungsanlagen |
DE19914313B4 (de) | 1999-03-01 | 2005-08-18 | Phoenix Contact Gmbh & Co. Kg | Überspannungsschutzsystem |
TWI293220B (en) * | 2005-11-07 | 2008-02-01 | Benq Corp | Circuit for charging protection |
US20070159758A1 (en) * | 2006-01-09 | 2007-07-12 | Ceramate Technical Co., Ltd. | Protective circuit for thunderbolt abrupt waves |
DE102006034404B4 (de) | 2006-06-08 | 2014-05-28 | Dehn + Söhne Gmbh + Co. Kg | Überstromschutzeinrichtung für den Einsatz mit Überspannungsschutzgeräten, mit einem zusätzlichen als Schlagbolzen ausgeführten mechanischen Auslöser |
-
2008
- 2008-09-29 DE DE102008049470A patent/DE102008049470A1/de not_active Ceased
- 2008-10-14 AT AT08838752T patent/ATE514177T1/de active
- 2008-10-14 EP EP08838752A patent/EP2089893B1/fr not_active Not-in-force
- 2008-10-14 WO PCT/EP2008/063767 patent/WO2009050153A1/fr active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2009050153A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2009050153A1 (fr) | 2009-04-23 |
EP2089893B1 (fr) | 2011-06-22 |
DE102008049470A1 (de) | 2009-04-23 |
ATE514177T1 (de) | 2011-07-15 |
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