EP2742522B1 - Déclencheur pour disjoncteur - Google Patents

Déclencheur pour disjoncteur Download PDF

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Publication number
EP2742522B1
EP2742522B1 EP12746333.9A EP12746333A EP2742522B1 EP 2742522 B1 EP2742522 B1 EP 2742522B1 EP 12746333 A EP12746333 A EP 12746333A EP 2742522 B1 EP2742522 B1 EP 2742522B1
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EP
European Patent Office
Prior art keywords
armature
spring
trigger
sub
coil
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
EP12746333.9A
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German (de)
English (en)
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EP2742522A1 (fr
Inventor
Ernst Hammermayer
Siegfried SUENDERMANN
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Eaton Industries Austria GmbH
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Eaton Industries Austria GmbH
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Publication of EP2742522A1 publication Critical patent/EP2742522A1/fr
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    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/34—Electromagnetic mechanisms having two or more armatures controlled by a common winding
    • H01H71/345—Electromagnetic mechanisms having two or more armatures controlled by a common winding having a delayed movable core and a movable armature
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • H01H3/605—Mechanical arrangements for preventing or damping vibration or shock making use of a fluid damper
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2409—Electromagnetic mechanisms combined with an electromagnetic current limiting mechanism

Definitions

  • the invention relates to a circuit breaker according to the preamble of claim 1.
  • triggers for circuit breakers are known in which an armature is movably guided within a coil. If the current flow within the coil exceeds a given short-circuit current flow, the armature is accelerated out of the trigger due to the prevailing electromagnetic forces. Subsequently, it is provided, for example, that the moving armature unlocks a switch lock.
  • Such triggers can, due to the high acceleration of the armature, not only unlatch a switch lock, but also deliberately accelerate parts of the switch lock, whereby a correct opening a quick opening of the switch contacts of the circuit breaker concerned can be achieved.
  • a disadvantage of such triggers is that they only work reliably at very high currents, such as short circuits.
  • a safe triggering with only small but too high currents which are also referred to as overload currents, is not possible with such a trigger, especially as the occurrence of such overload currents is provided that they may flow freely given by relevant guidelines period of time, and only after exceeding This time duration, which in turn is dependent on the size of the overcurrent, the triggering of the circuit breaker is to take place.
  • Known circuit breaker therefore generally have two different triggers, wherein the trigger for the short circuit case, as described above with conductor loop and movable armature is formed, and wherein the separate trigger for the overload is usually formed by a so-called.
  • Bimetallic release In a bimetallic a bimetallic element is heated directly and / or indirectly by the resistance-related waste heat of the electrical line, and also unlatches the switch lock by bending the bimetallic element. It is therefore an electro-thermal release.
  • a disadvantage of such known circuit breakers with two different triggers is the fact that two independent modules must be provided, manufactured and installed.
  • the bimetallic arise considerable costs, due to the required semi-finished product.
  • the bimetallic element such circuit breaker must be calibrated individually. In this case, it is necessary to check the conditions in which the relevant circuit breaker actually opens the switching contacts, and if necessary to manually change settings on the switching device. Especially with circuit breakers, this vote is only possible with great effort.
  • circuit breakers further cause considerable power losses due to the necessary high resistance of the bimetal or the additional indirect heating. Furthermore, such circuit breakers have an overcurrent tripping behavior, which is highly dependent on the ambient temperature, which has a direct influence on the bending of the bimetal. To prevent trips that are not caused by electrical faults when used in high ambient temperature environments, such as the Middle East or the tropics, specially designed circuit breakers are required for these countries.
  • the US 5,343,178 A describes a trigger for a circuit breaker, wherein the trigger comprises a liquid-filled tube within a coil, wherein on the tube, a first part anchor is arranged, and wherein a spring-loaded second part anchor is disposed within the tube.
  • the US 3,337,824 A describes a magneto-dynamic release, wherein both partial anchors are arranged within the trigger tube.
  • the object of the invention is therefore to provide a circuit breaker of the type mentioned, with which the mentioned disadvantages can be avoided, with which a triggering in both short circuit and overcurrents is possible, and with which the overcurrent trip is more accurate and independent of temperature, and which high switching capacity and easy automated manufacturing possible.
  • a contact device with a large contact spacing for increased switching capacity can be installed, and / or a large quenching chamber.
  • an inventive trigger on an overcurrent tripping behavior which is independent of the ambient temperature.
  • such a trigger is simply automated to produce, and does not require subsequent individual tuning, whereby the manufacturing process can be significantly simplified, and a high accuracy in the release is present.
  • both partial anchors are always moved when triggered, which due to the high mass, a high pulse can be achieved, which can act on a switching mechanism.
  • a high pulse can be achieved, which can act on a switching mechanism.
  • the opening process within a switching device can be accelerated with such a trigger.
  • the opening process is therefore not only dependent on the spring forces of the switch lock.
  • Such a trigger has a high switching capacity, and can not open the switch contacts of the relevant circuit breaker not only in a zero crossing.
  • Fig. 1 to 7 each show a particularly preferred embodiment of a trigger 1 for a circuit breaker 2, wherein the trigger 1 has a coil 3, wherein a trigger tube 4 is at least partially movably mounted within the coil 3 in a triggering direction 5, wherein a third part of the coil arranged outside the third anchor 6 is fixedly connected to the trigger tube 4, and wherein within the trigger tube 4, a movably mounted second sub-anchor 7 and a liquid are arranged.
  • a contact device with a large contact spacing for increased switching capacity can be installed, and / or a large quenching chamber.
  • an inventive trigger on an overcurrent tripping behavior which is independent of the ambient temperature.
  • such a trigger 1 is simply automated to produce, and does not require subsequent individual tuning, whereby the manufacturing process can be significantly simplified, and high accuracy when triggered.
  • both partial anchors 6, 7 are always moved when triggered, as a result of which, due to the high mass, a high impulse can be achieved, which can act on a switching mechanism 24.
  • a high impulse can be achieved, which can act on a switching mechanism 24.
  • the opening process within a switching device 2 can be accelerated with such a trigger 1.
  • the opening process is therefore not only dependent on the spring forces of the switching mechanism 24.
  • Such a trigger 1 has a high switching capacity, and can open the switch contacts 18, 21 of the relevant circuit breaker not only in a zero crossing of the current.
  • a trigger 1 is to be understood as meaning an electromechanical device which, upon the occurrence of certain predetermined electrical conditions, causes a predetermined mechanical action. This mechanical process can cause the mechanical opening of switching contacts 18, 21 of a switching device. In the given electrical conditions in question is in particular the height or strength of a current flow through the trigger 1, and its duration.
  • the implementation of the predefinable mechanical process is referred to as triggering the trigger 1 or briefly as triggering.
  • Triggers 1 are intended for use in circuit breakers 2.
  • a circuit breaker 2 is a switching device with switching contacts 18, 21, which is provided and designed to open at certain predetermined electrical states, the switching contacts 18, 21 and so to prevent the flow of current through the switching device.
  • the use of the trigger 1 in so-called is provided.
  • Circuit breaker is provided. However, it can also be used in Residual current circuit breaker and / or circuit breakers may be provided.
  • Triggers 1 are usually designed for certain operating conditions for which the relevant circuit breaker 2 is designed and approved.
  • the operating conditions concerned include limit values of the currents in the coil 3 and the behavior in which they reach or exceed.
  • the limit up to which no triggering should take place is referred to in the present case as a non-trip current. This depends on the local regulations, for example, 1.13 times the rated current.
  • an area beyond this limit is defined, wherein in the case of a current within this area no immediate triggering should take place, but the triggering is to take place only after the lapse of a predefinable time duration, which duration depends on the actual magnitude of the occurring current.
  • overcurrents or overload currents analogous to the occurrence of such overcurrents as an overload case.
  • the lower limit of the overload currents is defined by the non-tripping current.
  • short-circuit currents in the so-called short circuit case, it is provided that the trigger triggers essentially instantaneously, therefore with the minimum possible time delay.
  • Typical short-circuit currents reach values of a few thousand amperes in a conventional domestic installation arrangement.
  • the respective current intensities as well as the corresponding time behavior are regulated in relevant national or international regulations, such as in the ⁇ VE or IEC.
  • a trigger 1 according to the invention is an integral part of a circuit breaker 2. However, it may also be provided to form the trigger 1 as part of a separate circuit breaker 2 module, which is operatively coupled to a switching device to cause opening of the switching contacts 18, 21 of the relevant switching device to be specified.
  • the coil 3 of the trigger 1 is intended to be traversed by an electric current, which is representative of the current which prevails in an electrical installation environment, which is to be monitored by the trigger, or becomes. It is preferably provided that the coil 3 flows through the currents actually occurring in the installation environment in question.
  • trigger 1 in circuit breakers is preferably provided that the coil is at least indirectly connected to an input terminal 22 and an output terminal 23 of the circuit breaker 2 circuit technology, and thus forms part of the current path through the circuit breaker 2.
  • the coil 3 is arranged in a parallel bypass current branch next to a main current branch in or on the circuit breaker 2.
  • the coil 3 consists of a conductive wire, in particular a copper wire, predetermined cross section, and has a predetermined number of turns and an opening formed by the windings.
  • the cross-section of the wire is essentially dependent on the rated current.
  • the type and number of turns, as well as the dimensions of the coil 3 are dependent on other parameters, which will be discussed further here.
  • the coil 3 is formed as a substantially cylindrical coil 3. Therefore, that the individual layers of the coil 3 are wound side by side so that the thus formed opening has substantially the shape of a cylinder. It is preferably provided that the coil 3 has only one layer, as well as from the Fig. 1 to 7 is apparent. But it can also be differently shaped coils 3 may be provided. As already stated, the coil 3 forms an opening. The area inside the coil 3 is the area between the oppositely disposed coil turns in the region of the opening.
  • the coil 3 is preferably arranged or wound on a substantially nonmagnetic or paramagnetic coil carrier 20, preferably made of plastic, or such is arranged inside the coil 3.
  • the coil 3 is at least partially surrounded by a yoke 8, whereby the magnetic field lines can be selectively guided.
  • the yoke 8 is formed as a U-shaped bent metal part comprising ferromagnetic material surrounding the coil 3 on three sides, it can be provided that the yoke 8 has at least one opening to the passage of other components of the trigger 1 to enable.
  • the yoke 8 does not have to be an integral part of the trigger 1, but in the context of the invention, one of the other assemblies of the trigger 1 physically separate arrangement can be provided. It can be approximately provided to achieve the effect of the yoke 8 by corresponding metal parts, which are arranged in a circuit breaker 2 around the trigger 1 around, but which are not connected as an assembly with the other parts of the trigger 1.
  • the trigger has a so-called trigger tube 4.
  • the trigger tube 4 is intended to be moved in the case of triggering due to electromagnetic forces, and to cause by means of this movement triggering a circuit breaker 2.
  • the trigger tube 4 is preferably non-magnetic or paramagnetic.
  • the trigger tube 4 is formed as a non-magnetic metal tube, such as a brass tube.
  • the trigger tube 4 is preferably closed liquid-tight at both ends. For movement due to electromagnetic forces is - as stated at another point - provided that the trigger tube 4 is connected to other components.
  • the trigger tube 4 is arranged in regions within the coil 3.
  • the indication areawise refers to a length range of the trigger tube 4.
  • the trigger tube 4 is therefore to a first part of its length, which may also be referred to as trigger tube length, disposed within the coil 3, wherein other parts of the trigger tube 4 outside of the coil. 3 are arranged. It is particularly preferred that on both sides of the coil 3 areas of the trigger tube 4 extend beyond the coil 3 or survive.
  • the trigger tube 4 is movably mounted within the coil 3, wherein a mobility is given at least in a triggering direction 5.
  • a triggering direction 5 while the direction is referred to, in which a movement of the trigger tube 4 is provided in the case of triggering.
  • the triggering direction 5 extends parallel to a longitudinal extension of, in particular cylindrical, coil 3.
  • the movement in the triggering direction is preferably a linear movement.
  • the trigger tube 4 is mounted longitudinally displaceable in a slightly larger central opening of the coil carrier 20.
  • the trigger tube 4 has a stop 15.
  • the trigger 1 with a yoke 8 is provided in a development that the stopper 15 cooperates with the yoke 8, to specify the first rest position 10.
  • the entire trigger 1 can be easily manufactured as a completed assembly. If the trigger 1 has no yoke, it can be provided that the stop cooperates with the coil carrier 20 or the coil 3.
  • the trigger tube 4 abuts a part of a switching mechanism 24, and accelerated so, or that the trigger tube 4 pulls on a part of a switching mechanism 24 to unlock it.
  • a hook-shaped extension is connected to the triggering tube 4. Both can be implemented with physical trigger 1.
  • the trigger tube 4 is designed as a trigger plunger 16, which at the end remote from the first part anchor 6 has a release extension 17, which is formed approximately by a cap with an extension.
  • a first part anchor 6 is firmly connected to the trigger tube 4.
  • the first part anchor 6 is formed comprehensively a ferromagnetic material.
  • the first partial anchor 6 is at least partially arranged outside the coil 3, wherein it is provided according to a preferred embodiment that the first partial anchor is disposed substantially outside of the coil 3.
  • the term "outside the coil 3" designates an arrangement and structural design of the first part anchor 6, in which this is arranged substantially completely or at least in regions, in particular in the longitudinal extent of the coil 3 outside this. In this case, however, a arrangements may be provided laterally outside of the coil 3.
  • the movable to the first part armature 6 is arranged to a large extent outside of the coil, provided that the current flowing in the coil 3 is lower than a current of the current Non-triggering current has. It is envisaged that a formation of the first part of the anchor 6 in such a way that it is disposed within the coil 3 when triggering the trigger 1, or during the period of the triggering process, but the rest of the time or during the other operating cases outside the coil 3 is arranged to be regarded as arranged outside of the coil 3 first part armature 6.
  • first part armature 6 is acted upon by a first spring 9 in the direction of a first rest position 10 of the coil 3 away.
  • the amount of current at the occurrence of a short-circuit release is to be influenced.
  • the first spring 9 is designed as a compression spring, torsion spring or as a tension spring. It can be provided as training when training as a tension spring, that this spring connects the first part of anchor 6 with a part of a circuit breaker 2. It is preferably provided that the first spring 9 is formed as a compression spring. This allows a particularly simple and compact design of the entire trigger 1, without sensitive protruding parts, which can be easily manufactured as a whole simply automated. It is preferably provided that the compression spring between an abutment of the bobbin 20 and an extension of the first part armature 6 is arranged.
  • the first part anchor 6 has a region 11 extending in a disk-shaped manner normal to the release direction 5. At this disc-shaped portion 11, the first spring 9 can be supported.
  • a disk-shaped region 11 of the first partial armature 6 is particularly advantageous with regard to the bundling of the magnetic field lines.
  • Said disc-shaped region 11 is clearly visible.
  • the disk-shaped region 11 is formed integrally with the remaining first part armature 6. The disk-shaped region 11 extends normal to the longitudinal extent of the coil 3 and the trigger tube. 4
  • the disk-shaped region 11 can with respect to its geometry or its base be formed differently. It is preferably provided that the first part anchor 6 is formed as a rotationally symmetrical body, and consequently also the disk-shaped region 11 has a circular base surface. This is particularly advantageous in terms of the manufacturing effort. However, it can also be provided that the disk-shaped region 11 has a rectangular or square base surface. This is particularly advantageous in view of the arrangement with respect to a U-shaped yoke 8.
  • the disk-shaped region 11 has substantially the extent of the yoke 8. Under expansion is provided in forming the disc-shaped portion 11 with a circular base, that the diameter of the disc-shaped portion 11 corresponds to a width of the yoke 8. When forming the disk-shaped region 11 with a rectangular base surface, it is preferably provided that the disk-shaped region essentially has the dimensions of the part of the yoke 8 which is arranged opposite the disk-shaped region 11. By adapting the dimensions of the disk-shaped region 11 to the dimensions of the yoke 8, the magnetic conditions in this region can be made particularly advantageous.
  • a second part anchor 7 and a liquid are arranged within the trigger tube 4.
  • the second part anchor 7 is movably mounted within the trigger tube 4. It is preferably provided that the trigger tube 4, and also the interior thereof, have substantially circular cross-sections. Preferably, it is further provided that also the second part anchor 7 has a substantially circular cross-section.
  • the second partial armature 7 is intended to be moved or moved within the trigger tube 4 under the influence of predeterminable electromagnetic force effects generated by the coil 3. As a result, the second partial armature 7 can enter the region of the coil 3 and locally influence the flow of the magnetic field lines.
  • the second partial anchor 7 is therefore preferably formed comprising ferromagnetic material. It is preferably provided that the second part anchor 7 has a substantially opposite and slightly smaller cross section than the cavity 14 of the trigger tube 4. The function of the trigger 1 and the movement of the second part anchor 7 will be described later with reference to Fig. 2 to 7 explained.
  • a liquid is further arranged within the trigger tube 4. It is preferably provided that the entire resulting cavity 14 of the trigger tube 4 is substantially completely filled by the liquid. As the resulting cavity 14 while the entire space is designated within the trigger tube 4, which is not occupied by other representational components, in particular by the second part anchor 7 and a second spring 12 to be described later.
  • the liquid is intended to dampen the movements of the second part anchor 7 within the trigger tube 4, but not to prevent.
  • the liquid has a predeterminable viscosity. By selecting the liquid with regard to its viscosity, the damping of the movement of the second partial armature 7 within the triggering tube 4 can be defined and influenced in a predeterminable manner. It is preferably provided that the liquid is a hydraulic fluid. On the viscosity of the liquid, therefore, for example, by choosing different liquids, in particular the characteristics, especially the time behavior, the trigger can be influenced in case of overload.
  • the damping of the liquid is controlled by the shaping of the second part armature 7.
  • the damping of a movement within the liquid can be kept low, and by the angular shape - as shown in the figures - a high attenuation can be achieved with otherwise identical properties of the liquid and the electromagnetic structure.
  • the second part anchor 7 has a predeterminable number of channels on a side or lateral surface, whereby the damping by the liquid can be further influenced. Through the channels while the attenuation can be reduced.
  • a second spring 12 is arranged, which second spring 12 the second part of anchor 7 in the direction of the second rest position 13 is applied.
  • This second spring 12 may be formed as a tension spring or as a compression spring.
  • the second spring 12 is designed as a compression spring, and between the second part of anchor 7 and the first part of the anchor 6 associated region of the trigger tube 4 is arranged, whereby a simple structural implementation is supported. As a result, the exact adherence to the second rest position can be better supported than with a tension spring.
  • the second part anchor is preferred in this context and as in the Fig. 2 to 7 illustrated, a paragraph on which the helical compression spring rests.
  • any other means may be provided to load the first part anchor 6 and the second part anchor 7 in the direction of the respective rest positions, for example elastomeric elements and / or gas-filled containers ,
  • the Fig. 2 and 3 show the same view of the trigger 1, wherein this is in a so-called first operating case, in which the coil 3 is either de-energized, or a current flow through the coil below a predetermined overload current flow.
  • the first part anchor 6 is arranged in its first rest position and the second part anchor 7 in the second rest position.
  • the second part of anchor 7 is largely outside the coil 3. It is preferably provided that a coil length, a trigger tube length and a length of the second part anchor 7 are formed such that the second part anchor 7 when arranged in the second rest position 13 is arranged substantially outside of the coil 3.
  • the second part anchor 7 is arranged in this position to at least 50%, in particular at least 60%, preferably at least 70%, especially at least 80%, the length of the second part anchor 7 outside of the coil 3.
  • the length specifications always refer to the longitudinal extension of the trigger tube or in the release direction.
  • the coil length, the first part of anchor 6 and the length of the second part of anchor 7 are formed such that when the second part of the armature 7 within the coil 3 in such a way that through the coil 3 - at a current flow through the coil 3 according to the overload current flow - caused and on the second partial armature 7 acting electromagnetic forces are equal to the opposite acting spring force of the second spring, the first part armature 6 rests against the second part anchor 7. It can thereby be achieved that at the minimum flowing current, which is to cause a triggering of the trigger 1, the second sub-anchor 7 at the latest at the time in which this undergoes no further acceleration device with the first part anchor 6 in Appendix, and so the magnetic Circle at this point closes.
  • Fig. 2 to 7 the function of an objective trigger 1 described.
  • the Fig. 2 and 3 show the same view but in different image size, while the other Fig. 4 to 7 each represent different operating states or operating cases.
  • the Fig. 2 or 3 show the trigger 1 in a first case of operation.
  • the coil 3 either no current, or a predetermined permissible current flows below a non-tripping current and below a predetermined overload current flow. This is a condition in which no triggering should occur.
  • the first part anchor 6 is spaced apart from the coil 3 and the yoke 8 in the first rest position.
  • the second part anchor 7 is arranged in the second rest position, in which the second part anchor 7 is largely outside the coil 3.
  • the current possibly flowing through the coil 3 generates an electromagnetic force which tends to move both the first and the second partial anchors 6, 7 from their rest positions in the direction of the coil 3.
  • the electromagnetic force in question is too low in this case of operation to cause a movement of one of the two partial anchors 6, 7, so that no triggering takes place in this case of operation.
  • On the first part armature 6 acts in addition to the electromagnetic force of this opposite spring force of the first spring 9.
  • On the second part armature 7 acts in addition to the electromagnetic force of this opposite spring force of the second spring 12, and a flow resistance force within the liquid.
  • the indicated ratios of forces relate to their effect on the first and / or second partial anchors 6, 7, which, depending on the prevailing and stated relationships of forces to certain states remain at rest, or are moved. Due to the preferred movement of the first and / or second partial armature 6, 7 in the release direction is preferably provided that the respective relevant forces acting in the release direction force components.
  • the coil 3, the yoke 8, the first spring 9, the first part of anchor 6, the second spring 12, the liquid and the second part of anchor 7 are formed such that - at a current flow in the coil 3 smaller a predetermined overload current flow - a force acting on the second part anchor 7 spring force of the second spring 12 and a flow resistance force within the liquid are greater than the force acting on the second part anchor 7 electromagnetic force, and that acting on the first part anchor 6 electromagnetic force is smaller than one Spring force of the first spring 9.
  • the electromagnetic forces acting on the first and the second partial armatures 6, 7 can be of different sizes, although going back to the same cause. Both the features mentioned for the first partial armature 6 and for the second partial armature 7 refer to the stated state that the current flow in the coil 3 is smaller than a predetermined overload current flow.
  • the further behavior of the individual parts, in particular of the first and second part armatures 6, 7, depends on the size of the current flowing in the coil, therefore whether the now flowing current is an overload current, which definitely flows for a certain period of time allowed, or a short-circuit current.
  • the 4 to 6 show the trigger 1 in each case different operating cases, which be taken in succession of an overcurrent through the trigger 1 successively.
  • the first operating case according to Fig. 3 wherein the second partial armature 7 is in the second rest position, flows in the coil 3, an overload current.
  • the resulting - compared to the first case of operation - increased electromagnetic forces exceed the force acting on the second part anchor 7 spring force of the second spring 12 and the flow resistance force within the liquid, whereby the second part anchor 7 is set from its second rest position in motion, and in the direction moved to the spool 3. Meanwhile, the electromagnetic forces acting on the first partial armature 6 are not yet sufficient to move out of the first partial armature 6 in the direction of the coil 3.
  • Fig. 4 shows a snapshot of this operating case. Due to the damping by the liquid within the trigger tube 4, the movement of the second part anchor 7 is slowed down in time.
  • the coil 3, the yoke 8, the second spring 12, the liquid and the second part of anchor 7 are formed such that - at a current flow in the coil 3 greater a predetermined overload current flow - on the second part anchor 7 acting spring force of the second spring 12 and a flow resistance force within the liquid are smaller than the forces acting on the second part of the armature 7 electromagnetic force.
  • Fig. 5 shows the trigger 1 in a third case of operation.
  • the second part anchor 7 has - starting from Fig. 4 - Moved further in the direction of the first part anchor 6 and is in the representation according to Fig. 5 inside the coil 3.
  • An interior of the coil 3 is essentially occupied by the second partial anchor 7.
  • the period of time which the second partial armature 7 needs for the movement from the second rest position to the position within the coil 3 is, in addition to the embodiments of the trigger 1, which, however, are no longer changeable during operation of the trigger 1, only more of the current flow in the coil 3 dependent. The higher this current flow, the faster the second partial armature 7 is moved.
  • the magnetic circuit of the trigger 1 changes.
  • Fig. 5 shows a snapshot of the trigger 1 immediately before triggering.
  • the arrangement of the second partial armature 7 within the coil 3 leads to a guidance of the magnetic field lines in this area through the first and second partial armatures 6, 7.
  • first part anchor 6 rests against the second part anchor 7. It is therefore preferably provided that the first and the second partial anchor 6, 7 are formed such that a gap between them can go to zero in the concrete operating case.
  • this embodiment relates in particular to the lengths of the two partial anchors 6, 7, as well as to the provision of a correspondingly long space for accommodating the compressed second spring 12.
  • the second spring 12 can also be received within the second partial anchor 7, for example. Even small gaps in magnetic circuits have significant effects on the magnetic flux and lead to a reduction of the magnetic flux. By a vote of the magnetic system, in which only when a gap between the two partial anchors 6, 7, the force sufficient to move the trigger tube 4, a particularly sudden or sudden release can be supported.
  • the coil 3, the yoke 8, the first part of anchor 6, the second part of anchor 7 and the first spring 9 are formed such that - at a current flow in the coil 3 is greater a predetermined overload current flow, and at next the first partial armature 6 arranged second partial armature 7 - acting on the first partial armature 6 electromagnetic force is greater than a spring force of the first spring 9.
  • an overcurrent release can be formed, in which simply the required tripping times can be implemented depending on the amount of overload current, and which one in the event of a short circuit can already provide high impact pulse.
  • the subject trigger 1 behaves differently when a short-circuit current occurs than when an overload current occurs.
  • the electromagnetic force generated by the coil 3 is sufficient to overcome the spring force of the first spring 9 and to move the first partial armature 6 with the connected trigger tube 4.
  • the electromagnetic force in this case tends to move the second sub-anchor 7, this remains due to the damping effect of the liquid and the short duration of the effect of the electromagnetic force, which by the successful release of the trigger 1 and thus usually connected interruption of the current flow through the coil 3, comes to a standstill, substantially in the second rest position.
  • the damping properties of the liquid and the second spring, as well as the inertia of the second part anchor can be achieved that they remain during the abrupt movement of the trigger tube 4 in the position relative to the trigger tube 4.
  • the full mass of the trigger tube 4 and the two partial anchors 6, 7 contribute to the generation of a high impact pulse.
  • a strong effect on the switching mechanism 24 can be exercised.
  • the coil 3, the yoke 8, the first part of the anchor 6 and the first spring 9 are formed such that - at a current flow in the coil 3 greater a given short-circuit current flow - acting on the first part anchor 6 electromagnetic Force is greater than a spring force of the first spring.
  • the coil 3, the yoke 8, the first spring 9, the first part armature 6, the second spring 12, the liquid and the second part armature 7 are designed in this way that
  • the coil 3 and / or the yoke 8 and / or the first spring 9 and / or the first part anchor 6 and / or the second spring 12 and / or the liquid and / or the second part anchor 7 are designed to meet certain conditions defined above.
  • the effect of the coil 3 can be changed by their geometry and especially their number of turns.
  • the effect of the yoke 8 can be influenced by its geometry and choice of material.
  • the effect of the first spring 9 and the second spring 12 can be influenced by the spring constant and the number of turns.
  • the effect of the first partial armature 6 can be influenced by the shaping, in particular the extension of the disc-shaped area directed laterally to the longitudinal extent of the coil, as well as by the magnetic properties of the material.
  • the effect of the liquid can be influenced by the choice of the liquid with regard to its viscosity, wherein other aspects can be taken into account, such as the long-term stability of the relevant features, as well as the behavior of the liquid at different temperatures, frost resistance or high vapor pressure.
  • the effect of the second part anchor 7, in addition to the choice of material with regard to the magnetic properties can be influenced mainly by the geometric shape.
  • a hydrodynamic shaping for example, the damping of the movement of the second part armature 7 in the liquid can be influenced.
  • the structural design of the first and second part anchors 6, 7 has proven to be advantageous in that a substantially immediate abut each other of the two partial anchors, as in the FIGS. 5 and 6 represented, is made possible.
  • the subject invention further comprises a circuit breaker 2 with a subject trigger 1.
  • a trigger 1 in a circuit breaker can be provided that at least a portion of a contact apparatus of a circuit breaker 2 is arranged on the trigger 1 further.
  • Trigger 1 shown is fixed as a fixed contact carrier 19 designated metal strip, which carries a housing-fixed electrical switching contact 18, and which in the present embodiment, recognizable by the curved shape of the fixed contact carrier 19, forms part of a so-called arc run. It is envisaged that - as in the sectional views of the Fig. 2 to 7 not shown - the coil 3 is electrically connected to the fixed contact carrier 19.
  • Fig. 1 shows a circuit breaker as an exemplary or preferred embodiment of a circuit breaker 2.
  • the switch contacts 18, 21 are in the open position, where further well the switching mechanism 24 can be seen, which is arranged opposite the release plunger 16.
  • the trigger 1 is arranged in such a way in the circuit breaker 2 that the trigger tube 4 triggers the switching mechanism 24 in a movement in the triggering direction 5.
  • the relevant circuit breaker 2 is free of further triggers.
  • the circuit breaker 2 is free of separately constructed overcurrent releases, especially free of bimetallic elements.
  • the switching mechanism 24 of the circuit breaker is designed such that it performs certain movements for opening the switch contacts.
  • the trigger in the circuit breaker 2 according to Fig. 1 is arranged relative to the switching mechanism 24 of the circuit breaker 2, that - in the case of triggering - the trigger tube 4 abuts against a portion of the switching mechanism 24, and so accelerates parts of the switching mechanism 24 in one, the opening of switch contacts supporting direction. Thereby, the shutdown or the process of separation of the switching contacts can be accelerated. As a result, a separation of the switching contacts can be forced independently of the prevailing current amplitude, in contrast to known zero-point cancellers.
  • a trigger 1 it is provided that it has neither a first nor a second spring 9, 12.
  • a trigger 1 is provided only for use in a specific operating position, wherein the second part of anchor 7 is arranged pointing to the ground or a center of gravity.
  • the trigger tube 4 by a foil or paper in its position is held within the trigger 1.
  • the film can encompass approximately the trigger tube on the release extension 17.
  • the film is designed such that it is strong enough, the trigger tube in cases where no triggering should take place, see in this respect the above explanations, holds in the trigger 1, and that it can be pierced by the release tube 4 in the case of release.
  • it can also be provided to secure the first part anchor by means of a tear-off in its position.
  • the tear-off thread can be attached approximately to a housing part of the switching device.
  • Switching devices with such triggers 1 are suitable as a replacement for fuses, and have over these the advantages of a much more accurate tripping and low aging, since the tripping characteristic is not changed after the repeated occurrence of slight overcurrents, which did not lead to a tripping. Furthermore, these have an increased security against manipulation, as they can not be easily "patched" by laymen, as conventional fuses.
  • the second spring 12 is arranged, which may also be referred to as Auslenserohrinnenfeder.
  • the trigger 1 can be used in different operating positions, and there is greater freedom in defining the non-tripping current.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Claims (17)

  1. Disjoncteur (2), en particulier disjoncteur miniature, avec un déclencheur (1), dans lequel le déclencheur (1) présente une bobine (3), dans lequel un tube déclencheur (4) est logé de manière mobile dans certains endroits dans la bobine (3) dans un sens de déclenchement (5), dans lequel un premier induit partiel (6) disposé au moins par endroits en dehors de la bobine (3) est raccordé de manière fixe au tube déclencheur (4), et dans lequel un second induit partiel (7) logé de manière mobile et un liquide sont disposés dans le tube déclencheur (4), caractérisé en ce que le déclencheur (1) et un verrou de commutation (24) du disjoncteur (2) sont disposés de telle manière que dans le cas d'un déclenchement, le tube déclencheur (4) bute contre une partie du verrou de commutation (24), et accélère des parties du verrou de commutation (24) dans un sens soutenant l'ouverture de contacts de commutation (18, 21) du disjoncteur (2).
  2. Disjoncteur (2) selon la revendication 1, caractérisé en ce que la bobine (3) est entourée au moins par endroits par un étrier (8).
  3. Disjoncteur (2) selon la revendication 1 ou 2, caractérisé en ce que le premier induit partiel (6) est sollicité par un premier ressort (9) en direction d'une première position de repos (10) loin de la bobine (3).
  4. Disjoncteur (2) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que un second ressort (12) est disposé dans le tube déclencheur (4), lequel second ressort (12) sollicite le second induit partiel (7) en direction d'une seconde position de repos (13), laquelle seconde position de repos (13) est disposée en opposition par rapport au premier induit partiel (6).
  5. Disjoncteur (2) selon la revendication 3 ou 4, caractérisé en ce que le premier ressort (9) est réalisé en tant que ressort de pression.
  6. Disjoncteur (2) selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le premier induit partiel (6) présente une zone (11) s'étendant orthogonalement au sens de déclenchement en forme de disque.
  7. Disjoncteur (2) selon la revendication 5, caractérisé en ce que la zone en forme de disque (11) est sensiblement l'extension de l'étrier (8).
  8. Disjoncteur (2) selon l'une quelconque des revendications 4 à 7, caractérisé en ce que le second ressort (12) est réalisé en tant que ressort de pression, et est disposé entre le second induit partiel (7) et une zone associée au premier induit partiel (6) du tube déclencheur (4).
  9. Disjoncteur (2) selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'un espace creux (14) résultant du tube déclencheur (4) est rempli sensiblement complètement par le liquide.
  10. Disjoncteur (2) selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le tube déclencheur (4) présente une butée (15).
  11. Disjoncteur (2) selon la revendication 10, caractérisé en ce que la butée (15) coagit avec l'étrier (8) pour définir la première position de repos (10).
  12. Disjoncteur (2) selon l'une quelconque des revendications 1 à 11, caractérisé en ce que le tube déclencheur (4) est réalisé en tant que coulisseau déclencheur (16) qui présente sur l'extrémité éloignée du premier induit partiel (6) un prolongement déclencheur (17).
  13. Disjoncteur (2) selon l'une quelconque des revendications 1 à 12, caractérisé en ce qu'une longueur de bobine, une longueur de tube déclencheur et une longueur du second induit partiel (7) sont réalisées de telle manière que le second induit partiel (7) soit disposé lors de l'agencement dans la seconde position de repos (13) à au moins 50%, en particulier à au moins 60%, de préférence à au moins 70%, avant tout à au moins 80 %, de la longueur du second induit partiel (7), en dehors de la bobine (3).
  14. Disjoncteur (2) selon l'une quelconque des revendications 4 à 13, caractérisé en ce que la bobine (3), l'étrier (8), le premier ressort (9), le premier induit partiel (6), le second ressort (12), le liquide et le second induit partiel (7) sont réalisés de telle manière que pour un flux de courant dans la bobine (3) inférieur à un flux de courant de surcharge prescrit, une force de ressort agissant sur le second induit partiel (7) du second ressort (12) ainsi qu'une force de résistance à l'écoulement dans le liquide sont supérieures à la force électromagnétique agissant sur le second induit partiel (7), et qu'une force électromagnétique agissant sur le premier induit partiel (6) est inférieure à une force de ressort du premier ressort (9).
  15. Disjoncteur (2) selon l'une quelconque des revendications 4 à 14, caractérisé en ce que la bobine (3), l'étrier (8), le second ressort (12), le liquide et le second induit partiel (7) sont réalisés de telle manière que pour un flux de courant dans la bobine (3) supérieur à un flux de courant de surcharge prescrit, une force de ressort agissant sur le second induit partiel (7) du second ressort (12) ainsi qu'une force de résistance à l'écoulement dans le liquide sont inférieures à la force électromagnétique agissant sur le second induit partiel (7).
  16. Disjoncteur (2) selon l'une quelconque des revendications 4 à 15, caractérisé en ce que la bobine (3), l'étrier (8), le premier induit partiel (6) et le premier ressort (9) sont réalisés de telle manière que pour un flux de courant dans la bobine (3) supérieur à un flux de courant de court-circuit prescrit, une force électromagnétique agissant sur le premier induit partiel (6) est supérieure à une force de ressort du premier ressort (9).
  17. Disjoncteur (2) selon l'une quelconque des revendications 4 à 16, caractérisé en ce que la bobine (3), l'étrier (8), le premier induit partiel (6), le second induit partiel (7) et le premier ressort (9) sont réalisés de telle manière que pour un flux de courant dans la bobine (3) supérieur à un flux de courant de surcharge prescrit, et pour un second induit partiel (7) disposé à côté du premier induit partiel (6), une force électromagnétique agissant sur le premier induit partiel (6) est supérieure à une force de ressort du premier ressort (9).
EP12746333.9A 2011-08-12 2012-08-13 Déclencheur pour disjoncteur Active EP2742522B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201161522828P 2011-08-12 2011-08-12
ATA1180/2011A AT511791A2 (de) 2011-08-12 2011-08-12 Auslöser für einen schutzschalter
PCT/EP2012/065789 WO2013024061A1 (fr) 2011-08-12 2012-08-13 Déclencheur pour disjoncteur

Publications (2)

Publication Number Publication Date
EP2742522A1 EP2742522A1 (fr) 2014-06-18
EP2742522B1 true EP2742522B1 (fr) 2018-04-25

Family

ID=47681275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12746333.9A Active EP2742522B1 (fr) 2011-08-12 2012-08-13 Déclencheur pour disjoncteur

Country Status (4)

Country Link
EP (1) EP2742522B1 (fr)
CN (1) CN102956411B (fr)
AT (1) AT511791A2 (fr)
WO (1) WO2013024061A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3699943B1 (fr) * 2019-02-21 2022-05-11 Hager-Electro Sas Déclencheur magnétique pour appareil électrique de coupure
DE102019218567B3 (de) * 2019-11-29 2021-05-06 Universität Stuttgart Aktor mit aktivem Kern

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337824A (en) * 1963-12-09 1967-08-22 Albert B Rypinski Circuit breaker having dashpot type electro-magnetic core and simplified actuating linkage
US4427959A (en) * 1982-04-06 1984-01-24 Matsushita Electric Works, Ltd. Circuit protecting sensor
GB2117973B (en) * 1982-04-06 1986-01-08 Matsushita Electric Works Ltd Circuit protecting sensor
US5343178A (en) * 1993-07-09 1994-08-30 Circuit Breaker Industries Limited Electric circuit breaker
CN1041971C (zh) * 1994-02-28 1999-02-03 断路器工业有限公司 一种用于断路器的电磁操纵装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2013024061A1 (fr) 2013-02-21
CN102956411A (zh) 2013-03-06
CN102956411B (zh) 2017-12-22
EP2742522A1 (fr) 2014-06-18
AT511791A2 (de) 2013-02-15

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