EP3766090A1 - Disjoncteur de protection pour la coupure d'un circuit électrique - Google Patents

Disjoncteur de protection pour la coupure d'un circuit électrique

Info

Publication number
EP3766090A1
EP3766090A1 EP19709715.7A EP19709715A EP3766090A1 EP 3766090 A1 EP3766090 A1 EP 3766090A1 EP 19709715 A EP19709715 A EP 19709715A EP 3766090 A1 EP3766090 A1 EP 3766090A1
Authority
EP
European Patent Office
Prior art keywords
arc
circuit breaker
fixed contact
switching unit
extinguishing
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
Application number
EP19709715.7A
Other languages
German (de)
English (en)
Other versions
EP3766090B1 (fr
Inventor
Klaus Loos
Klaus Werner
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.)
Ellenberger and Poensgen GmbH
Original Assignee
Ellenberger and Poensgen GmbH
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 Ellenberger and Poensgen GmbH filed Critical Ellenberger and Poensgen GmbH
Publication of EP3766090A1 publication Critical patent/EP3766090A1/fr
Application granted granted Critical
Publication of EP3766090B1 publication Critical patent/EP3766090B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H33/182—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • 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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/446—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts

Definitions

  • Circuit breaker for disconnecting a circuit
  • the invention relates to a circuit breaker with a switching unit as Trennvor- direction for interrupting a circuit, comprising a stationary fixed contact and a Beweg konta kt, which is movable relative to the fixed contact and from a closed position into an open position, and a deletion means for extinguishing a when opening The resulting arcing arc, with an antechamber for guiding the arc from the Konta k- th to a quenching chamber.
  • a circuit breaker with a switching unit as Trennvor- direction for interrupting a circuit comprising a stationary fixed contact and a Beweg konta kt, which is movable relative to the fixed contact and from a closed position into an open position, and a deletion means for extinguishing a when opening The resulting arcing arc, with an antechamber for guiding the arc from the Konta k- th to a quenching chamber.
  • a reliable separation of electrical components or devices of a circuit or circuit is desirable, for example, for installation, assembly or service purposes and in particular for general personal protection.
  • a corresponding switching unit or disconnecting device must be able to make an interruption under load, ie without a previous shutdown of a voltage source supplying the circuit.
  • a circuit breaker with a switching unit is described in DE 20 2006 021 064 U1, in which a (switching) arc arising when a contact system is opened is extinguished by means of an extinguishing device.
  • the quenching device has an antechamber with two arc runners, which are arranged between two insulating side or cover walls as a lateral boundary to the arc guide. The arc is passed through the pre-chamber to a quenching chamber and extinguished there.
  • the invention has for its object to provide a particularly suitable circuit breaker for the separation of a circuit.
  • the circuit breaker according to the invention is suitable for interrupting a circuit, in particular a DC circuit, and set up.
  • the circuit breaker is thus designed as a switching device for the manual and / or automatic switching off of electrical circuits or individual consumers when the permissible current or voltage values (overcurrent, fault current) are exceeded.
  • circuit breaker on a switching unit as a separator with a switchable mechanical contact system.
  • Switching is understood here and below as meaning in particular a mechanical or galvanic contact separation ("opening") and / or a contact closure (“closing”) of the contact system.
  • the contact system has a fixed stationary contact and a motion network.
  • the Beweg konta kt is movable relative to the fixed contact and from a
  • the switching unit also has an extinguishing device for extinguishing a (switching) arc produced when the contacts are opened.
  • the extinguishing device is designed with a quenching chamber for extinguishing the switching arc and with an antechamber for guiding the arc from the contacts to the quenching chamber.
  • the pre-chamber has two insulating side walls as side cover plates, with a pair of arc runners between the side walls.
  • the antechamber is thus open on both sides on the end faces, wherein the one end face faces the contact system and the other end side of the quenching chamber.
  • the pre-chamber thus forms an arc running space, which is limited to the sides by means of the insulating side walls as cover plates and the arc runners for guiding the arc.
  • the transition of the arc from the contacts of the contact system to the adjacent ones Arc runners of the antechamber is also referred to below as commutation.
  • the quenching chamber suitably has an inlet facing the open end face of the pre-chamber and an oppositely disposed outlet for the gas flow of the arc.
  • a ferromagnetic molding is arranged on the side walls, which is preferably adapted to the course of the arc run rails.
  • the molded parts are produced in a simple manner, for example as stamped parts.
  • the mold parts are in this case applied outside of the arc run space, ie on the outside of the side walls of the antechamber.
  • the moldings surround the light arc running space of the antechamber substantially over the entire surface.
  • a permanent magnet (permanent magnet) whose magnetic field guides the arc along one of the arc runners is additionally arranged in this embodiment. This allows a particularly fast and effective extinction of a resulting arc. Thus, a particularly effective and reliable switching unit is realized.
  • the ionized (switching) arc is forced or channeled in the direction of the quenching chamber due to the electrodynamic interactions with the magnetic field of the permanent magnet.
  • bundling or focusing of the magnetic field in the immediate contact area of the contacts is realized by the ferromagnetic molded parts as side plates.
  • the arc magnetic field which accompanies the arc strives to pass through the magnetically better conductive moldings. This creates a "suction" in the direction of the moldings, which causes the arc moves to the antechamber.
  • the ferromagnetic moldings are at least partially magnetized by the magnetic field of the permanent magnet, so that the magnetic field is related Its magnetic field lines between the arc tracks effectively bundled, that is concentrated or focused, is. This concentrated bundling of the magnetic field results in a particularly uniform and fast arc guiding into the extinguishing package.
  • the permanent magnet is suitably made of a heat-resistant material.
  • the permanent magnet is made of a magnetic material, which keeps its magnetic properties even at high temperatures, as they occur in particular in the region of the arc.
  • a magnetized ferromagnetic material is used for the permanent magnet whose material-specific Curie temperature is greater than the expected temperatures in the arc region.
  • the permanent magnet is for example made of a samarium alloy, in particular a samarium-cobalt alloy, preferably Sm Coi, or a neodymium alloy, in particular neodymium-NiCuN, or an aluminum alloy, in particular AINiCoöOO.
  • the permanent magnet generates a magnetic field with a magnetic field strength between 900 mT (milli-Tesla) to
  • 1500 mT in particular between 1000 mT to 1250 mT.
  • the arc is commutated particularly fast by the fixed contact on the rails, and thus pulled away from the contact system.
  • the contact material losses in the area of the contacts due to the arcing are reduced.
  • the arc is moved particularly stably and quickly on the arc running track by the magnetic field concentrated by means of the molded parts.
  • the extinguishing device is optimized such that a switching arc is "sucked" into the extinguishing chamber quickly and effectively by means of the prechamber and the permanent magnet, without passing through the extinguishing chamber and igniting at the outlet or raking off at the extinguishing chamber and before it To re-ignite the inlet. Due to the fast and reliable Permitted guidance of the arc by means of the antechamber is a particularly effective extinguishing device realized, so that the extinguishing chamber with sufficiently good extinguishing behavior is particularly flat construction executable. As a result, a particularly space-compact switching unit is made possible.
  • two shape magnets are provided for guiding the arc in addition to the permanent magnet.
  • the permanent magnet is suitably arranged between the mold magnets. This ensures a particularly reliable and reliable guidance of the arc to the quenching chamber.
  • the switching unit has, in each case, in each case a shaped magnet instead of the molded parts, wherein the common magnetic field generated by the shaping magnets leads the arc along one of the arc running rails.
  • the shaped magnets have substantially the same geometric shape or contour as the ferromagnetic molded parts.
  • the mold magnets can be used optionally with or without the permanent magnet. It is also conceivable, for example, a combination of at least one ferromagnetic molding and at least one magnet shape and with or without the permanent magnet. In contrast to the moldings, the mold magnets always have a magnetization even in the absence of the permanent magnet, which generates the magnetic field for guiding the arc.
  • the circuit breakers according to the invention thus each have a particularly effective extinguishing device for extinguishing occurring switching arcs. Due to the improved quenching behavior of the extinguishing device of the circuit breaker, these are particularly flat construction executable. As a result, a flat circuit breaker construction is made possible, whereby the use in installation space-reduced installation situations, such as in control cabinets, improved.
  • the arc runner along which the arc is guided by means of the magnetic field of the permanent magnet and / or the magnet shape, is brought to the fixed contact.
  • the arc runner has a curved or curved course from the fixed contact to the extinguishing chamber.
  • this (first) arc runner connects the fixed contact with a first side wall of the quenching chamber.
  • the arc runner has a convex course starting from the fixed contact due to the bending. As a result of the curvature or bending, the arc is guided away from the fixed contact in a particularly reliable manner, so that a material loss or wear of the fixed contact is reduced.
  • the other (second) arc runner preferably connects a stop surface on which the Beweg konta kt in the open position is applied, with a second side wall of the quenching chamber, so that a reliable commutation of the arc is also possible in the range of Beweg Memberships.
  • the first side wall of the extinguishing chamber is in particular a magnetic yoke of a short-circuit release of a tripping mechanism.
  • the circuit breaker is in particular designed to be integral with the yoke.
  • the permanent magnet in the region of bending or curvature of the arc bar is arranged.
  • the permanent magnet is arranged radially in relation to the bending radius of the bend or curvature to the (first) arc run rail. With such a radially inner side arrangement of the permanent magnet, it is thus arranged outside the prechamber. In particular, the permanent magnet is thus at least partially surrounded or enclosed by the (first) arc running rail. In the case of a convex course of the (first) arc runner, this is thus guided approximately U-shaped or V-shaped around the permanent magnet. Thus, the permanent magnet is reliably and simply protected from direct contact with the arc. As a result, the life of the permanent magnet we considerably improved.
  • the permanent magnet it is also conceivable, for example, for the permanent magnet to be arranged radially on the outside, ie outside the arc running rail, and thus within the arc running space of the prechamber.
  • the ferromagnetic moldings and / or the mold magnets each have an electrical insulation on the end faces oriented toward the extinguishing chamber.
  • the moldings or mold magnets are provided to the inlet of the quenching chamber with insulation.
  • an electrical short circuit along the quenching chamber and the moldings or mold magnets is prevented.
  • this advantageously transfers to the life of the extinguishing device and thus of the switching unit.
  • the moldings or mold magnets are encapsulated as inserts with the insulation in the region of the end faces.
  • the moldings or magnets form the front side in particular inserted in an insulating part.
  • the insulations are injection-molded and / or encapsulated or inserted in process-related manner on the ferromagnetic moldings or mold magnets. This means that the molded part or the magnet shape and the insulation are designed in particular as a composite part. This ensures a particularly simple and low-cost production and insulation of the moldings or magnets. Thus, a particularly cost-effective circuit breaker is realized.
  • the quenching chamber is designed as a deion chamber with an arc quenching packet, that is to say with an erase packet stack with a number of quenching plates or spreader plates.
  • a material for the quenching plates for example, ferromagnetic materials are used, since the magnetic field which accompanies the arc, in the vicinity of a ferromagnetic material tends to pass through the magnetic better conducting quenching plates. This creates a suction effect in the direction of the quenching plates, which causes the arc to move to the arrangement of the quenching plates and be divided between them.
  • the moving contact is the one used
  • Switching unit arranged on a pivotable switching arm, which is coupled to a manual actuation mechanism for manual adjustment of the switching between the open position and the closed position, and with a trigger mechanism for automatically returning the switching arm in the open position at an occurrence of a trigger condition.
  • the manual actuation mechanism has, for example, a pivoting lever, which is coupled by means of a mechanism with the switching arm.
  • the mechanism has, for example, a spring element, expediently a torsion spring, which pretensions the pivoting lever in the direction of a first pivoting position corresponding to the open position of the switching arm, so that the
  • the release mechanism preferably has a short-circuit release, which is designed to actuate the release mechanism in the event of an electrical short circuit as the triggering condition.
  • the short-circuit release has, for example, a magnetic coil, a magnetic yoke and a magnet armature, where in the magnetic yoke in particular a first side wall of the quenching chamber forms.
  • the release mechanism preferably has an overload release or overcurrent release.
  • the overload release is essentially formed, for example, by a bimetallic strip, which heats up as a result of the current flow and deforms such that it actuates the triggers e- chanik and thus the switching arm or the contact system in case of overload, ie in the associated triggering condition ,
  • the switching unit and the triggering mechanism and the manual operating mechanism are at least partially accommodated in a common switch housing.
  • a reliable contact protection finger protection
  • the side walls of the switching unit are in this case oriented parallel to the end faces of the switching housing, wherein between the antechamber and the Weg- housing a gap region, ie a clear distance is formed.
  • a gap region is particularly advantageous for pressure equalization in the course of arc extinguishment.
  • the gap region is preferably at the front side the prechamber, so opened to contacts and the inlet. Due to the sudden air heating, the arc pushes a pressure wave in the prechamber, which can hinder the inlet of the arc in the extinguishing chamber. Due to the gap area between the switch housing and the prechamber pressure equalization in front of and behind the prechamber is possible, so that the inlet of the arc chamber is not hindered in the quenching. This ensures a particularly reliable and reliable extinguishing of the arc.
  • FIG. 2 shows a switching unit of the circuit breaker with a contact system and with a quenching unit, which has an antechamber with two side walls and a quenching chamber,
  • FIG. 3 shows the switching unit of FIG. 2 with a side wall removed
  • FIG. 4 shows an alternative embodiment of the switching unit with a manual actuation mechanism and with a trigger mechanism of the circuit breaker
  • FIG. 5 is an enlarged detail view of the embodiment of FIG .. 4
  • Fig. 1 shows a circuit breaker 2 for interrupting a circuit.
  • the circuit breaker 2 has a switching unit 4 explained in more detail with reference to FIGS. 2 to 5.
  • the circuit breaker 2 further comprises a switch housing 6 made of an insulating material.
  • the circuit breaker 2 is preferably designed in the manner of a DIN rail mounted device.
  • the switch housing 6 accordingly has a characteristic for such devices, symmetrical to a front side 8 graduated shape.
  • a projecting central part 10 of the front side 8 projects from the switch housing 6 to a pivoting lever 12 of a manual operating mechanism 14 (FIGS. 4, 5).
  • the circuit breaker 2 is provided with a latching groove 18, which is typical for DIN rail mounted devices, for latching onto a mounting rail, in particular a DIN rail.
  • two end faces 20 of the switch housing 6 are arranged, along which the circuit breaker 2 is lined up in the installed or assembled state of a modular installation device.
  • FIGS. 2 and 3 show a first and second embodiment of the switching unit 4, 4 '.
  • the switching unit 4, 4 ' has a mechanical contact system with a stationary fixed contact 22 and with respect to this relatively movable movement contact 24.
  • the moving contact 24 is supported by a switching arm 26 and by means of this between an open position, in which the fixed contact 22 and the moving contact 24 are spaced from each other, and a closed position, in which the fixed contact 22 and the moving contact 24 in an electrically conductive Touch of contact are, movable or
  • the switching unit 4, 4 'further comprises an extinguishing device 28 for extinguishing a (switching) arc produced when the contacts 22, 24 are opened.
  • the extinguishing device 28 has an extinguishing chamber 30, which serves as a
  • Deionhunt is formed with a packet inserted therein of mutually parallel quenching plates 32, on.
  • the quenching plates 32 are provided with reference numerals by way of example only.
  • the extinguishing device 28 further has an antechamber 34, by means of which the arc of the contacts 22, 24 to the extinguishing chamber 30 is performed.
  • the prechamber 34 has a first arc run rail 36 and a second light arc run rail 38.
  • the arc run rail 36 is embodied integrally with a magnet yoke 40 of a short-circuit release 42 of a release mechanism 44 of the circuit breaker 2 (FIGS. 4, 5).
  • the arc runner 38 is formed together with a power supply 46 as an integrally continuous sheet metal part, wherein the power supply 46 simultaneously forms a support for a bimetallic strip 48 of an overload release 50 of the trigger mechanism 44 (Fig. 4, Fig. 5).
  • the pre-chamber 34 further has two insulating side walls 52 as side cover plates, between which the arc run rails 36, 38 are enclosed.
  • the side walls 52 and the arc run rails 36, 38 thus form an arc run space for guiding the arc from the contacts 22, 24 to the quenching chamber 30.
  • ferromagnetic shaped parts 54 are applied to the outer surfaces, that is to say on the surfaces facing the end faces 20, of the side walls 52 of the switching unit 4.
  • the molded parts 54 have an outer contour, which is approximately matched to the course of the arc runners 36, 38.
  • the molded parts 54 are designed as a composite part with a molded-on insulation 56, which is arranged on the end face of the molded parts 54 facing the quenching chamber 30.
  • two shaping magnets 54' are provided in the alternative embodiment of the switching unit 4 '.
  • the shaping magnets 54 ' have substantially the same shape or contour as the molded parts 54.
  • the shaping magnets 54 ' are likewise provided with the insulation 56. This means that the shaping magnets 54 'and the molded parts 54 differ essentially only in the material used.
  • FIG. 3 shows the switching unit 4, 4 'of FIG. 2 with a side wall 52 removed.
  • a hit-resistant permanent magnet 58 is arranged in the region of the fixed contact 22.
  • the permanent magnet 58 may be provided in the embodiment of the switching unit 4 'herein in addition to the forming magnets 54'.
  • the switching unit 4 'without the permanent magnet 58 is an embodiment of the switching unit 4 'without the permanent magnet 58.
  • the permanent magnet 58 generates a magnetic field which leads the arc along the arc track 36.
  • the permanent magnet 58 is radi al inside a - seen from the fixed contact 22 - convex bend or curvature 60 of the arc run rail 36 is arranged.
  • the permanent magnet 58 is disposed substantially within the course of the arc runner 36.
  • the insulating sidewalls 52 insulate the ferromagnetic moldings 54 or mold magnets 54 'from the arc so that the mold members 54 or the mold magnets 54' in particular do not heat beyond their respective Curie temperature and thus become paramagnetic.
  • the side walls 52 project beyond the contact point of the contacts 22, 24 at the end, so that they are essentially enclosed between the side walls 52 of the prechamber 34. The arc is thus already at a
  • the shaped parts 54 of the switching unit 4 concentrate the magnetic field of the permanent magnet 58.
  • the resulting magnetic force acts immediately on the emerging arc and pulls it from the fixed contact 22 onto the arc runner 36 down.
  • the arc is commutated particularly fast on the arc guide rail 36 in the formation by the magnetic field and guided to the extinguishing chamber 30.
  • the magnetic field is generated by the shaping magnets 54 'of the switching unit 4 additionally or alternatively to the magnetic field of the permanent magnet 58. witnesses, and thus the arc commutated by the resulting magnetic force from the fixed contact 22 on the arc guide rail 36.
  • FIGS. 4 and 5 show a further embodiment of the switching unit 4, 4 '.
  • the moving contact 24 is in one piece, so one piece or monolithic, executed at the free end of the switching arm 26.
  • FIGS. 4 and 5 show the antechamber 34 without the side walls 52 and thus without the shaped parts 54 or shaping magnets 54 ', which, however, in the assembled state limit the arc running space of the pre-chamber 34 to the end faces 20 in this embodiment as well.
  • FIGS. 4 and 5 show, in addition to the switching unit 4, the manual actuating mechanism 14 and the tripping mechanism 44 with the short-circuit release 42 and the overcurrent release 50.
  • the manual actuating mechanism 14 is essentially formed by the
  • the switching arm 26 has a two-part design and has a contact lever 66 with the free-end-side moving contact 24, and a latch lever 68.
  • the switching arm 26 is biased by a tension spring 70.
  • the triggering mechanism 44 has a release slide 72 and the overload release 50 formed essentially of the bimetallic strip 48 and the electromagnetic short-circuit release 42.
  • the short-circuit release 42 has a magnetic coil 74 and a magnetic core 76 as well as the magnet yoke 40 and a magnet armature 78.
  • the armature 78 is in this case coupled to a plastic rod not shown in detail, which is held biased by a compression spring.
  • the latch lever 68 of the switching arm 26 is a
  • the contact lever 66 is articulated by means of a rotary joint 82 to the latch lever 68, so that the switching arm 26 has a certain flexibility in itself.
  • the relative mobility of the contact lever 66 with respect to the pawl lever 68 caused thereby is limited by an oblong hole 84 on the rear end of the contact lever 66, which is remote from the moving contact 24, into which the rotation axis 80 engages in the manner of a linear guide.
  • the moving contact 24 cooperates with the fixed contact 22 in order to switch a current circuit.
  • the fixed contact 22 is applied in particular to an upper side of the magnetic yoke 40 at the base of the arc running rail 36 integrally connected thereto.
  • FIG. 4 shows the switching unit 4, 4 in a closed state or in a closed position of the switching arm 26 in which the movement konta kt 24 forming free end of the contact lever 66 rests against the fixed contact 22.
  • an electrically conductive connection is generated between a supply terminal 86 or coupling contact 88 and a load terminal 90 of the circuit breaker 2, which via a busbar 92, the solenoid coil 74, the magnetic yoke 40, the fixed contact 22, the contact lever 66 with the movement konta kt 24, the bimetallic strip 48 and an adjoining busbar 94 leads.
  • the electrical connection between the rear end of the contact lever 66 and the bimetallic strip 48 and between the bimetallic strip 48 and the bills 94 is closed by means of a stranded connection 96, which are shown only schematically in FIG.
  • the core component of the triggering mechanism 44 is the trigger slide 72, which is actuated both by the bimetallic strip 48 of the overload release 50 and by the plastic rod of the short-circuit release 42 coupled to the magnet armature 78, and the reset by actuation of one of the releases 50 or 42 the switching arm 26 of the closed position in the open position (Fig. 5) causes.
  • a short circuit in a circuit connected to the terminals 86 and 90 leads to a sudden increase in the current flowing through the magnetic coil 74.
  • the large current increase causes a proportional increase in the magnetic field generated by the magnetic coil 74, as a result of which the magnet armature 78 is actuated.
  • the release slide 72 is actuated, and thus the contacts 22 and 24 are separated.
  • FIG. 5 shows a final state of a tripping operation in which the travel contact 24 bears against a stop surface 98, which forms a projection of the second arc track 38 that is at a distance from the fixed contact 22.
  • the (switching) arc arises between the fixed contact 22 and the lifting contact 24 that lifts away from it, which leads to a strong heating and, in the long term, to a burning off of the contacts 22 and 24.
  • the extinguishing device 28 serves in this case the fast coui ven extinguishing the arc.
  • the arc runner 38 is released from the power supply 46 such that the arc runner 38 is guided along in the region of the stop surface 98 to the contact lever 66 abutting in its open position, and - viewed from the movement konta kt 24 along the contact lever 66 - only behind the Moving konta kt 24 merges into the power supply 46.
  • the contact lever 66 is already in abutment against the abutment surface 98, the current conducted by the fixed contact 22 via the arc gap to the movement contact 24 has to travel a certain distance before the abutment of the contact lever 66 within the contact lever 66 or the arc runner 38 flow in the direction of the slot side lever end until it is discharged via the power supply 46 in the opposite direction.
  • the arc runner 38 is in this case cut out in particular centrally from the power supply 46 in order to ensure the most symmetrical flow of current in the transition region.
  • the magnetic yoke 40 into which the running rail 36 is integrated, is not closed in a circle around the magnet coil 74. Rather, the magnet yoke 40 is interrupted at a bottom side facing the magnet armature 78 by a narrow air gap 100 (FIG. 4). In this case, the air gap 100 is dimensioned such that it does not significantly impair the magnetic flux within the magnetic yoke 74, but effectively prevents a flow of current over the gap gap. Instead, a direction of the fixed contact 22 and the arc running rail 36 directed current path is always forced within the magnetic yoke 40. The direction of the current path is given in the context of this description, regardless of the actual current flow direction as starting from the feed terminal 86 or coupling contact 88 and aligned with the load terminal 90.
  • the geometric characteristics of the current flow within the circuit breaker 2 and the induction effect caused thereby remain over the entire tripping operation until the extinction of the arc.
  • the arc dissolves from the contacts 22 and 24 at the latest after the abutment of the contact lever 66 on the abutment surface 98 and merges with the adjacent arc runners 26 and 38. This process is called commutation.
  • the arc then travels, trapped by side walls 52 and mold members 54 or forming magnets 54 ', further under the influence of the electrodynamic forces along arc runners 36 and 38 in the arc run space of prechamber 34 formed therebetween Inlet 102 of the extinguishing chamber 30 to.
  • the arc Via the inlet 102, the arc enters the quenching chamber 30 and is divided by the quenching plates 32 into a number of partial arcs.
  • the extinguishing plates 32 promote extinguishment of the arc in a manner known per se, by multiplying the total voltage drop across the entire arc gap and cooling the arc.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Keying Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

La présente invention concerne un disjoncteur de protection (2) avec une unité de coupure (4) pour interrompre un circuit électrique, comprenant un contact fixe stationnaire (22) et un contact mobile (24), qui peut être déplacé par rapport au contact fixe (22) et être amené depuis une position fermée à une position ouverte, ainsi qu'un dispositif de désamorçage (28) pour désamorcer un arc électrique produit lors de l'ouverture des contacts (22, 24), avec une préchambre (34) pour guider l'arc électrique depuis les contacts (22, 24) vers une chambre de désamorçage (30). La préchambre (34) comprend deux parois latérales isolantes (52) et une paire de rails d'arc électrique (36, 38) installée entre les parois. Une pièce moulée ferromagnétique (54) est disposée contre chacune des parois latérales (52) et, dans la zone du contact fixe (22) est disposé un aimant permanent (58) dont le champ magnétique guide l'arc électrique le long d'un des rails (36).
EP19709715.7A 2018-03-16 2019-03-08 Disjoncteur de protection pour la coupure d'un circuit électrique Active EP3766090B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018204104.0A DE102018204104A1 (de) 2018-03-16 2018-03-16 Schalteinheit zur Trennung eines Stromkreises und Schutzschalter
PCT/EP2019/055812 WO2019175042A1 (fr) 2018-03-16 2019-03-08 Disjoncteur de protection pour la coupure d'un circuit électrique

Publications (2)

Publication Number Publication Date
EP3766090A1 true EP3766090A1 (fr) 2021-01-20
EP3766090B1 EP3766090B1 (fr) 2023-05-03

Family

ID=65718022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19709715.7A Active EP3766090B1 (fr) 2018-03-16 2019-03-08 Disjoncteur de protection pour la coupure d'un circuit électrique

Country Status (11)

Country Link
US (1) US20200411259A1 (fr)
EP (1) EP3766090B1 (fr)
JP (1) JP2021518632A (fr)
KR (1) KR20200128574A (fr)
CN (1) CN112219253A (fr)
CA (1) CA3094003A1 (fr)
DE (1) DE102018204104A1 (fr)
ES (1) ES2947094T3 (fr)
HU (1) HUE062383T2 (fr)
PL (1) PL3766090T3 (fr)
WO (1) WO2019175042A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD901400S1 (en) * 2017-03-07 2020-11-10 Phoenix Contact Gmbh & Co. Kg Electrical connector
USD952575S1 (en) * 2020-02-05 2022-05-24 Dehn Se Surge protection device
DE102020127201B3 (de) 2020-10-15 2022-03-17 WST Präzisionstechnik GmbH Vorrichtung zum Be- und Entladen sowie zum Bedienen eines Maschinenschraubstocks

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3369095A (en) * 1964-01-29 1968-02-13 Maggi Ernesto Arc-extinguishing chambers for alternating current utilizing permanent magnets
DE3466318D1 (en) * 1983-10-15 1987-10-22 Licentia Gmbh Quenching device for an automatic circuit breaker
US5004874A (en) * 1989-11-13 1991-04-02 Eaton Corporation Direct current switching apparatus
DE29620519U1 (de) * 1996-11-25 1997-02-06 Heinrich Kopp Ag, 63796 Kahl Kontaktanordnung für Fehlerstromschutzschalter
DE10117346B4 (de) * 2001-04-06 2004-05-06 Siemens Ag Schutzschalter mit einer Löscheinrichtung
DE102006027140A1 (de) * 2006-06-12 2007-12-13 Ellenberger & Poensgen Gmbh Schutzschalter
DE102007025537A1 (de) * 2007-05-31 2008-12-04 Abb Ag Elektrisches Installationsschaltgerät mit einer Lichtbogenblaseinrichtung
DE102007053636B3 (de) * 2007-11-08 2009-04-09 Abb Ag Elektrisches Installationsgerät mit Lichtbogen-Vorkammerraum, Vorkammerplatten und strombegrenzender Lichtbogenlöscheinrichtung
DE102007054958A1 (de) * 2007-11-17 2009-06-04 Moeller Gmbh Schaltgerät für Gleichstrom-Anwendungen
CN101866788A (zh) * 2009-04-14 2010-10-20 上海良信电器股份有限公司 一种改善熄弧效果的直流断路器
DE102011002714B4 (de) * 2011-01-14 2021-01-14 Siemens Aktiengesellschaft Schutzschaltgerät
DE102011112714B4 (de) * 2011-09-07 2015-01-22 Audi Ag Vorrichtung zur Reduzierung von Schwingungen an einer Radaufhängung
EP2590192A1 (fr) * 2011-11-02 2013-05-08 Eaton Industries GmbH Commutateur pour un fonctionnement à courant continu multipolaire
US8847096B2 (en) * 2012-09-05 2014-09-30 Eaton Corporation Single direct current arc chute, and bi-directional direct current electrical switching apparatus employing the same
DE102014002902B4 (de) * 2014-02-27 2019-08-01 Schaltbau Gmbh Löschkammer für ein Schütz und ein Schütz zum Löschen von Lichtbögen

Also Published As

Publication number Publication date
PL3766090T3 (pl) 2023-09-11
ES2947094T3 (es) 2023-08-01
CN112219253A (zh) 2021-01-12
US20200411259A1 (en) 2020-12-31
HUE062383T2 (hu) 2023-10-28
WO2019175042A1 (fr) 2019-09-19
DE102018204104A1 (de) 2019-09-19
KR20200128574A (ko) 2020-11-13
CA3094003A1 (fr) 2019-09-19
EP3766090B1 (fr) 2023-05-03
JP2021518632A (ja) 2021-08-02

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