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 thermally triggering, disconnecting and / or signaling the state of an overvoltage protection device with a blocking element on which acts a first force and at
• Exceeding a limit temperature changes its state of aggregation and / or its external shape, according to claim 1.
• DE 10 2010 061 110 A1 likewise discloses a thermal severing device, wherein a first conductor section is galvanically coupled to a second conductor section via a thermally detachable contact. If the temperature is too high, the contact point is released and the first conductor section is conveyed by an always acting on him force in an insulating, so that between the two conductor sections no electrical connection is possible.
• DE 10 2009 022 069 A1 shows a device for thermally triggering or disconnecting 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 acts on a second force.
• the ends of the overvoltage protection unit facing the contact lug are designed such that they have an ironing shape, at least one bracket representing a stop for a visual display pivotable about an axis, the pivoting movement then being released, if with the help of one
• the jaws are preferably arranged such that normal forces acting on the blocking element are substantially compensated. This can be realized in particular by two opposing jaws. Also conceivable is a variant with three jaws which are each offset by 60 degrees, so that here also essentially no resultant force acts on the blocking element. According to the same principle, more jaws can preferably be arranged, which are even closer together.
• one or more jaws may have a chamfered step, which bear against the environment, in particular a housing or a housing partition wall, so supported that the second force causes a yielding of one or more jaws, when they are no longer blocked by the blocking element.
• a yielding of one or more jaws is blocked in the first state, in that they are pressed by the stepping against the blocking element and there is essentially no room for yielding. Staging and blocking element cause the larger, second force is diverted to the environment and does not affect the blocking element.
• Telecommunication device for closing or interrupting a circuit set up so that according to a variant of the circuit is interrupted in the first state and is closed in the second state.
• active switching to a second state can be realized.
• a circuit is closed by the telecommunication device in a first state and interrupted in a second state.
• the blocking element and / or the holding device is friction-reduced coated.
• the frictional forces generated by the holding device, via the blocking element by the second force can be reduced.
• Locking element be designed so that the holding device can essentially rest only at a point or a line.
• the locking element may be wedge-shaped or cone-shaped, so that upon transition to the second state, after a first dislocation, the locking element will snap out of its fixation.
• the holding device in particular one or more jaws, be chamfered so that after a first displacement in the transition to the second state, the power decoupling is canceled and the blocking element is additionally accelerated by the second force.
• Fig. 1 shows a first embodiment according to the invention with two compliant
• Fig. 3 shows a first embodiment of the invention in a second
• Fig. 1 shows a device for thermally triggering or disconnecting an overvoltage protection device with a display surface and slider S1 in the first state Z1.
• a force F2 is applied by a coil spring.
• the coil spring is supported to a housing G, in which the slider S1 is mounted.
• the coil spring serves as a force storage, wherein the force F2 is correspondingly high to move the slider S1.
• the slider S1 has a holding device, which is realized by two opposing jaws B.
• the jaws B of the holding device H l are made resilient, in particular consisting of a flexible plastic material. Furthermore, the jaws B each have an outwardly oriented groove. These are there to accommodate each cam, which are realized as part of the housing G. By the second force F2, the slider S1 is pressed in the direction of the locking element A1. By the cams, which engage in the groove of the jaws B, this force is decomposed into a component force component Fl, so that the jaws are pressed inwards.
• FIG. 2 shows the device for thermal triggering of a surge protection device from FIG. 1.
• the shape of the blocking element A1 has changed by exceeding a limit temperature and the device is in the second state Z2 (Fig. 3) over.
• FIG. 3 shows the device according to FIGS. 1 and 2, wherein the state transition is in a second phase.
• the blocking element A1 has been largely deformed.
• the jaws B of the holding devices can move inwards.
• the second force F2 the jaws B are pressed inwards via the latching means, in particular through the cams of the housing, so that the right-hand side of the groove of the jaws B no longer blocks a movement of the slider S1.
• the latching connection H1 is thus overcome.
• the second force F2 accelerates the slider S1 and thus also moves the display surface A to the right. This signals e.g. a triggering of the overvoltage protection device.
• the locking element is not fixed, but only loosely inserted and held clamped between the jaws B. Furthermore, only a partial force component F1, generated by the spring force F2 via the
• the blocking element changes its state of aggregation, ie is deformable by the partial force component F1, so that ultimately the elastic, yielding Jaws B are compressed, with the result of the release of a path of movement of the slider S1, using the usually larger force F2.
• FIG. 4 shows, as a second variant according to the invention, a solution which starts only from an elastic jaw B.
• 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 may be part of the housing G.
• the blocking element A1 is in thermal contact with a heat source, e.g. a surge protector, and is loosely inserted between the jaws B and BF held.
• a heat source e.g. a surge protector
• the jaw B is an outward

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• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Fuses (AREA)

Priority Applications (5)

Applications Claiming Priority (4)

Publications (1)

Family

ID=58054959

Family Applications (1)

Country Status (7)

Families Citing this family (3)

Citations (7)

Family Cites Families (1)

• 2015
  • 2015-11-03 DE DE102015014163.5A patent/DE102015014163A1/de not_active Withdrawn
• 2016
  • 2016-08-31 EP EP16760452.9A patent/EP3347910B1/de active Active
  • 2016-08-31 PL PL16760452T patent/PL3347910T3/pl unknown
  • 2016-08-31 CN CN201680051833.8A patent/CN108028153B/zh active Active
  • 2016-08-31 WO PCT/EP2016/070464 patent/WO2017042062A1/de active Application Filing
  • 2016-08-31 ES ES16760452T patent/ES2881637T3/es active Active
  • 2016-08-31 SI SI201631314T patent/SI3347910T1/sl unknown

Patent Citations (7)

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