EP3347910B1 - Vorrichtung zum thermischen auslösen, abtrennen und/oder signalisieren des zustandes eines überspannungsschutzgerätes - Google Patents

Vorrichtung zum thermischen auslösen, abtrennen und/oder signalisieren des zustandes eines überspannungsschutzgerätes Download PDF

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Publication number
EP3347910B1
EP3347910B1 EP16760452.9A EP16760452A EP3347910B1 EP 3347910 B1 EP3347910 B1 EP 3347910B1 EP 16760452 A EP16760452 A EP 16760452A EP 3347910 B1 EP3347910 B1 EP 3347910B1
Authority
EP
European Patent Office
Prior art keywords
locking element
state
force
jaws
slider
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.)
Active
Application number
EP16760452.9A
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German (de)
English (en)
French (fr)
Other versions
EP3347910A1 (de
Inventor
Uwe Strangfeld
Stephan Hierl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dehn SE and Co KG
Original Assignee
Dehn and Soehne GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dehn and Soehne GmbH and Co KG filed Critical Dehn and Soehne GmbH and Co KG
Priority to SI201631314T priority Critical patent/SI3347910T1/sl
Priority to PL16760452T priority patent/PL3347910T3/pl
Publication of EP3347910A1 publication Critical patent/EP3347910A1/de
Application granted granted Critical
Publication of EP3347910B1 publication Critical patent/EP3347910B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/22—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
    • 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
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/323—Thermally-sensitive members making use of shape memory materials
    • 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
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/18—Electrothermal mechanisms with expanding rod, strip, or wire

Definitions

  • the invention relates to a device for thermal triggering, disconnecting and / or signaling the state of an overvoltage protection device with a blocking element on which a first force acts and which changes its physical state and / or its external shape when a limit temperature is exceeded, according to claim 1.
  • the DE 10 2006 037 551 B4 shows a locked separating device, wherein a movable solder preform is put under force by a pretensioned spring, but this cannot evade as long as a solder bolt blocks the path of movement. If the solder bolt melts due to a thermal overload, which is caused, for example, by a high current, the solder preform moves and thus a slide, so that a circuit is closed, which, for example, emits a warning signal.
  • the U.S. 3,412,356 is based on a similar operating principle and shows a thermal fuse in which contact is established between a fixed metal sleeve and a movable contacting element in the sleeve, the movable contacting element being connected to a movement mechanism that is pretensioned by a spring and is blocked by a fixed soldering bolt . If the solder bolt melts, the movable contacting element moves out of the metal sleeve and the electrical contact is interrupted.
  • the DE 10 2010 061 110 A1 also discloses a thermal disconnection device, a first conductor section being galvanically coupled to a second conductor section via a thermally releasable contact. If the temperature is too high, the contact point loosens and the first conductor section is conveyed into an insulating section by a force constantly acting on it, so that an electrical connection is no longer possible between the two conductor sections.
  • the DE 10 2005 045 778 A1 concerns a temperature fuse.
  • Two conductor sections are connected via a third conductor section. If the temperature is too high, this conductor section is actuated by an Bolt moved so that it no longer acts as a connecting element between the other two conductor sections and interrupts a circuit that is closed over the conductor sections.
  • a control compares a temperature recorded by sensors with a predetermined limit temperature and triggers a movement of the bolt when the limit temperature is exceeded.
  • a passive solution can also be implemented using a pretensioned spring or bending element, in which a relaxation movement is blocked by a mechanical safety device. The mechanical fuse is released when a limit temperature is exceeded, as a result of which the relaxation movement of the spring or bending element pushes the connecting element out of the conductor section and thus interrupts the circuit.
  • the DE 10 2009 022 069 A1 shows a device for thermal triggering or disconnection of an overvoltage protection device with a related blocking element which is under the action of a force and a slide which is blocked by the fixed blocking element and on which a second force acts.
  • the ends of the overvoltage protection unit facing the contact lug are designed so that they have a bow shape, with at least one bow representing a stop for a visual indicator that can be pivoted about an axis, the pivoting movement being released when the parallel ends of the The brackets of the contact lugs move laterally away from the contact lug.
  • mechanical actuation devices are designed as bolts or pins.
  • At least two overcurrent protection devices are arranged relative to one another in such a way that the direction vectors of the bolts or pins intersect in an imaginary extension of their movement path, the respective bolt or pin acting on a respective intended surface side of a movable armature and the armature occupying a changeable position in the movement path , but is also located at the intersection of the imaginary extension of the movement paths of the bolts.
  • the armature has a further surface side, which in turn acts on the error signaling element when the armature moves and for this purpose this further surface comprises at least one wedge slope in order to change the direction of force due to the movement of one of the bolts.
  • the object of the present invention is to provide a further developed device for thermally triggering, disconnecting and / or signaling the state of an overvoltage protection device which provides sufficient mechanical forces for actuating a display, a switching contact or the like.
  • the device for thermal triggering, disconnecting and / or signaling the state of the overvoltage protection device comprises a blocking element on which a first force acts and which changes its physical state and / or its external shape when a limit temperature is exceeded.
  • the locking element can change its shape from, for example, a circular cross-section to an elliptical cross-section.
  • the device comprises a slide which is indirectly blocked by the blocking element in a first state.
  • a second force acts on the slide. The second force transfers the slide to a second state when the locking element has changed its physical state.
  • the device has a latching holding device. This is connected to the slide, in particular in a detachable or fixed manner.
  • the locking element indirectly blocks the slide by means of the latching holding device.
  • the holding device is designed in such a way that the second force which acts on the slide essentially only acts in a frictionally locking manner and not in the direction of movement of the first force on the blocking element.
  • the locking element can, for. B. an electrical circuit can be closed. This can take place in particular in that the blocking element is designed to be electrically conductive. Additionally or alternatively, a circuit can be closed by the slide when it is in the first state. This circuit is preferably interrupted when the slide moves into the second state. In particular, this circuit can be interrupted in the second state.
  • the basic idea of the invention is to decouple the locking element from the second, greater force that is required to move the slide and trigger an action. This takes place in that essentially no positive forces, which have their origin in the second force, act on the locking element. Only the first force acts positively, i.e. directly on the locking element.
  • the second force acts essentially solely by frictional engagement, that is to say indirectly on the locking element.
  • a high force can be implemented as the second force that is necessary to move the slide without the locking element being pressed out of its position for a long time and the device being subject to a "creeping release" as a result.
  • the holding device comprises at least two tong-like jaws, of which at least one jaw is designed to be flexible, which in the first state are supported against the locking element and against the surroundings of the slide.
  • An environment in the sense of the invention can in particular be a housing or a housing partition wall of the device, or a device that is connected to the device according to the invention.
  • the jaws are designed to be elastically resilient, so that they return to their original position after a forced deformation State. As a result, the holding element can in particular be reused.
  • the jaws are preferably arranged in such a way that normal forces acting on the locking element essentially compensate one another. This can be achieved in particular by two opposing jaws. A variant with three jaws, each offset by 60 degrees, is also conceivable, so that essentially no resultant force acts on the locking element here either. According to the same principle, more jaws can preferably also be arranged, which are even closer together.
  • One or more jaws can preferably have a beveled step, which are supported against the environment, in particular a housing or a housing partition, in such a way that the second force causes one or more jaws to yield when they are no longer blocked by the locking element.
  • a step can preferably be part of a groove which is supported against a corresponding cam in the surroundings.
  • a step can be part of a cam which is supported against a corresponding groove in the surroundings.
  • the holding device and / or the slide can be positioned easily and precisely during installation by means of a groove-cam connection, in particular without a subsequent displacement taking place.
  • the device has a display area which signals the respective state (first state, second state) of the slide.
  • the display surface can in particular be arranged fixedly or detachably on the slide.
  • the device has a telecommunication device which signals the respective state (first state, further state) of the device.
  • the telecommunication device is connected directly to the slide and / or is triggered by it.
  • the telecommunication device is preferably for closing or interrupting a circuit set up so that, according to a variant, the circuit is interrupted in the first state and closed in the second state.
  • a switch to a second state can be actively implemented.
  • the telecommunication device it is also possible for the telecommunication device to close a circuit in a first state and to interrupt it in a second state.
  • the locking element and / or the holding device is coated to reduce friction.
  • the frictional forces generated by the holding device via the locking element by the second force can be reduced.
  • an even more comprehensive decoupling of the second force from the locking element is possible, so that essentially only the first force acts on the locking element and the locking element can be moved out of the jaws quickly.
  • the contact area between the locking element and the holding device is small.
  • one or more jaws of the holding device can be designed in such a way that it essentially rests on the locking element at only one point.
  • the blocking element can also be designed such that the holding device can essentially only rest at one point or one line.
  • the locking element can preferably be shaped like a wedge or a cone, so that the locking element snaps out of its fixation during the transition to the second state, after a first displacement.
  • the holding device, in particular one or more jaws can also be chamfered in such a way that after a first displacement during the transition to the second state, the force decoupling is canceled and the locking element is additionally accelerated by the second force.
  • Fig. 1 shows a device for thermal tripping or disconnection of an overvoltage protection device with a display area and slide S1 in the first state Z1.
  • a force F2 is applied to this by a spiral spring.
  • the spiral spring is supported on a housing G in which the slide S1 is mounted.
  • the spiral spring serves as an energy store, the force F2 being correspondingly high to move the slide S1.
  • the slide S1 has a holding device which is implemented by two opposing jaws B.
  • a locking element A1 is also provided on the housing G.
  • the blocking element A1 is preferably in thermal contact with a heat source, in particular the overvoltage protection device, and is loosely inserted and held only by the jaws B.
  • the jaws B of the holding device H1 are designed to be flexible, in particular consisting of a flexible plastic material. Furthermore, the jaws B each have an outwardly oriented groove. These are there to each receive a cam, which are implemented as part of the housing G.
  • the second force F2 pushes the slide S1 in the direction of the locking element A1.
  • the jaws B avoid inward deflection by the locking element A1, which is arranged between the ends of the jaws B. This prevents the jaws B from moving in relation to one another and thus also prevents the slide S1 from moving.
  • the locking element A1 prevents movement the jaws B of the slide to each other.
  • the pliers of the jaws cannot be squeezed together.
  • the latching connection H1 prevents the slide from moving.
  • the opposing jaws B compensate for the normal forces which are applied to the holding device H1 via the jaws B by the second force F2. This means that the resulting normal force on the locking element A1 disappears.
  • the second force F2 is thus decoupled from a direct effect on the locking element A1 in the first state.
  • Fig. 2 shows the device for thermal tripping of an overvoltage protection device Fig. 1 .
  • the shape of the blocking element A1 has changed when a limit temperature is exceeded and the device goes into the second state Z2 ( Fig. 3 ) about.
  • Fig. 3 shows the device after Fig. 1 and 2 , the state transition is in a second phase.
  • the locking element A1 was largely deformed by the first force F1. This allows the jaws B of the holding devices to move inward. Due to the second force F2, the jaws B are pressed inwards via the latching means, in particular by the cams of the housing, so that the right side of the groove of the jaws B no longer blocks a movement of the slide S1. The latching connection H1 is thus overcome.
  • the second force F2 accelerates the slide S1 and thus also moves the display area A to the right. This signals, for example, that the overvoltage protection device has tripped.
  • the locking element is not fixed, but only loosely inserted and held between the jaws B by clamping. Furthermore, only a partial force component F1, generated by the spring force F2 via the clamping jaws B, acts on the locking element A1 in a direction that is changed vectorially.
  • the blocking element changes its state of aggregation when a limit temperature is exceeded, that is to say it can be deformed by the partial force component F1, so that ultimately the elastic, resilient ones Clamping jaws B are compressed, with the result that a movement path of the slide S1 is released with recourse to the usually greater force F2.
  • FIG. 4 shows, as a second variant according to the invention, a solution which starts from an elastic jaw B only.
  • the locking element A1 is acted upon by this elastic jaw B against a fixed jaw BF with a force, wherein the fixed jaw BF can be part of the housing G.
  • the blocking element A1 is in thermal contact with a heat source, e.g. an overvoltage protection device, and is held loosely inserted between the jaws B and BF.
  • a heat source e.g. an overvoltage protection device
  • the jaw B has an outwardly oriented groove into which a cam H1, which can be part of the housing G, engages.
  • the mechanism of action when the locking element is heated with subsequent deformation corresponds to that as shown in FIG Figs. 1 to 3 described.
  • the blocking element A1 changes its physical state when a limit temperature is exceeded and is deformed by the partial force component F1 with the result that the elastic clamping jaw B moves in the direction of the fixed jaw BF, with the result that the movement path of the slide S1 is released , with the greater force F2 coming into effect in this regard.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fuses (AREA)
EP16760452.9A 2015-09-08 2016-08-31 Vorrichtung zum thermischen auslösen, abtrennen und/oder signalisieren des zustandes eines überspannungsschutzgerätes Active EP3347910B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI201631314T SI3347910T1 (sl) 2015-09-08 2016-08-31 Naprava za toplotno sprožanje, ločevanje in/ali signaliziranje stanja prenapetostne zaščite
PL16760452T PL3347910T3 (pl) 2015-09-08 2016-08-31 Urządzenie do termicznego wyzwalania, separowania i/lub sygnalizowania stanu urządzenia do ochrony przed przepięciami

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102015011730 2015-09-08
DE102015014163.5A DE102015014163A1 (de) 2015-09-08 2015-11-03 Vorrichtung zum thermischen Auslösen, Abtrennen und/oder Signalisieren des Zustandes eines Überspannungsschutzgerätes
PCT/EP2016/070464 WO2017042062A1 (de) 2015-09-08 2016-08-31 Vorrichtung zum thermischen auslösen, abtrennen und/oder signalisieren des zustandes eines überspannungsschutzgerätes

Publications (2)

Publication Number Publication Date
EP3347910A1 EP3347910A1 (de) 2018-07-18
EP3347910B1 true EP3347910B1 (de) 2021-07-21

Family

ID=58054959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16760452.9A Active EP3347910B1 (de) 2015-09-08 2016-08-31 Vorrichtung zum thermischen auslösen, abtrennen und/oder signalisieren des zustandes eines überspannungsschutzgerätes

Country Status (7)

Country Link
EP (1) EP3347910B1 (zh)
CN (1) CN108028153B (zh)
DE (1) DE102015014163A1 (zh)
ES (1) ES2881637T3 (zh)
PL (1) PL3347910T3 (zh)
SI (1) SI3347910T1 (zh)
WO (1) WO2017042062A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018125520A1 (de) 2018-10-15 2020-04-16 Dehn Se + Co Kg Überspannungsschutzgerät mit mehreren Überspannungsableitern und diesen jeweils zugeordneter, insbesondere thermischer, Abtrennvorrichtung
DE102018131975B4 (de) * 2018-12-12 2021-01-14 Dehn Se + Co Kg Thermisch auslösbare Anzeige- oder Schalteinrichtung sowie Überspannungsableiteranordnung mit einer thermisch auslösbaren Anzeige- oder Schalteinrichtung
DE102019114424A1 (de) * 2019-05-29 2020-12-03 Phoenix Contact Gmbh & Co. Kg Überlastschutzanordnung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3412356A (en) * 1967-03-21 1968-11-19 United Carr Inc Thermal fuse with triggering mechanism
DE102005045778A1 (de) 2005-09-23 2007-03-29 Robert Bosch Gmbh Temperatursicherung und Verfahren zur Unterbrechung eines spannungs- und/oder stromführenden Leiters im thermischen Fehlerfall
DE102006037551B4 (de) 2006-02-13 2012-03-22 Dehn + Söhne Gmbh + Co. Kg Überspannungsableiter mit mindestens einem Ableitelement, beispielsweise einem Varistor
CN101354981B (zh) * 2008-04-17 2012-03-28 柯赐龙 一种温控器中的热敏致动结构
DE102009022069B4 (de) 2009-01-12 2016-10-20 Dehn + Söhne Gmbh + Co. Kg Überspannungsableiter
DE102010061110A1 (de) 2010-12-08 2012-06-14 Phoenix Contact Gmbh & Co. Kg Thermische Abtrennvorrichtung
DE102012011072B4 (de) 2012-03-26 2016-03-03 Dehn + Söhne Gmbh + Co. Kg Defektanzeige für eine elektronische Einrichtung, insbesondere Überspannungsableiter
DE102013006052B4 (de) 2013-02-08 2016-08-04 DEHN + SÖHNE GmbH + Co. KG. Überspannungsschutzgerät

Also Published As

Publication number Publication date
SI3347910T1 (sl) 2021-11-30
WO2017042062A1 (de) 2017-03-16
PL3347910T3 (pl) 2021-10-04
CN108028153B (zh) 2020-06-05
CN108028153A (zh) 2018-05-11
DE102015014163A1 (de) 2017-03-09
EP3347910A1 (de) 2018-07-18
ES2881637T3 (es) 2021-11-30

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