EP2406804B1 - Power distribution system - Google Patents
Power distribution system Download PDFInfo
- Publication number
- EP2406804B1 EP2406804B1 EP10710813.6A EP10710813A EP2406804B1 EP 2406804 B1 EP2406804 B1 EP 2406804B1 EP 10710813 A EP10710813 A EP 10710813A EP 2406804 B1 EP2406804 B1 EP 2406804B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit breaker
- power distribution
- distribution system
- current
- actuator
- 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.)
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Classifications
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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
- H01H71/2418—Electromagnetic mechanisms combined with an electrodynamic current limiting mechanism
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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
- H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
- H01H2071/124—Automatic release mechanisms with or without manual release using a solid-state trip unit with a hybrid structure, the solid state trip device being combined with a thermal or a electromagnetic trip
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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
- H01H71/2463—Electromagnetic mechanisms with plunger type armatures
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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
- H01H71/42—Induction-motor, induced-current, or electrodynamic release mechanisms
- H01H71/43—Electrodynamic release mechanisms
-
- 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
- H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
-
- 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
- H01H71/66—Power reset mechanisms
- H01H71/68—Power reset mechanisms actuated by electromagnet
Definitions
- the invention relates to a power distribution system with upstream and downstream circuit breakers according to the preamble of claim 1.
- the document FR 2 739 220 discloses a system according to the preamble of claim 1.
- circuit breakers in the power distribution and to selectively disable them in the event of a short circuit, ie the upstream circuit breaker should only trigger when no downstream circuit breaker can separate the branch affected by the short circuit.
- Each circuit breaker has moving switch contacts, which are flowed through during operation current.
- the movable switch contacts are usually spring-loaded and are held pressed by the spring force to an associated fixed switch contact.
- the current is passed through the switch contacts that magnetic current forces are generated dynamically, which in the event of a short circuit, ie at a very steep increase in current, separate the switching contacts, wherein the movable switching contact lifts off from the fixed switching contact.
- each circuit breaker has a trigger (overload and short-circuit release), which triggers when a predetermined threshold is exceeded. The tripping of the circuit breaker takes place by unlatching a switching mechanism, which opens all switching contacts.
- the current limitation by the arc allows small-sized circuit breakers and the system to design the lower short-circuit level.
- the selective behavior is achieved by so-called energy selectivity.
- the switch contacts current-dynamically lift off at the dimensioned lift limit, wherein the mechanically trained selective release reacts only above a predetermined threshold and triggers the circuit breaker.
- the threshold value (triggering threshold) is, for example, the switching chamber pressure, which is equivalent to the arc energy. Below this threshold value is not triggered after lifting the switch contacts and the switch contacts are closed due to the Federkraftbeetzwegung again, so that the circuit breaker is again in the on state and thus is selective.
- a catch mechanism for the switch contacts ensures a locking of the movable switch contacts to protect the circuit breaker at very high switching performance.
- the Verrastddling the catch mechanism must be constructively matched with the threshold value of Selektivauslösers, so that a clear switching state is ensured.
- the Selective trigger reacts even if the capture mechanism has already been active. For energy-selective circuit breakers, the selective release only reacts after a dynamic opening or a dynamic closing. The tripping and thus the protective function of the circuit breaker are thus delayed, so that the contact system can open and close to the threshold without triggering.
- Time-selective circuit-breakers with rated currents greater than 630 A are dimensioned so that several half-cycles of a short-circuit current can flow through without destroying the circuit breaker. This makes it possible to wait for the reaction of an upstream circuit breaker and to selectively switch it off only when necessary.
- Energy selectivity ie a combination of dynamic current limiting behavior and a selective shutdown is not known at rated currents greater than 630 A. This is due to the inertia of the contact system as well as the relatively high energy consumption in the circuit breaker, which usually leads to welding of the switch contacts during dynamic opening and closing.
- the object of the invention is to propose an energy-selective circuit breaker, which can also be used with larger nominal currents and has a long service life.
- the solution provides that a triggerable by the selective actuator actuator is provided, which actuates the catch mechanism for releasing the movable switch contact, when there is a drop below the criterion.
- a simple solution is to use a given threshold as a criterion.
- circuit breaker has a switching mechanism, which is unlatched to trigger the circuit breaker from the actuator.
- the catch mechanism has a latch.
- the idea of the invention is therefore to combine dynamically opening latchable switch contacts with an actuator, which in turn is triggered by a threshold value.
- the invention thus eliminates the disadvantage that circuit breakers for rated currents greater than 630 A and dynamically opening switch contacts weld by preventing them from falling over again.
- the movable switch contact can open and latch highly dynamically, while Selektivauslöser and actor ensure that a closing of the switch contact is released only when the switch contacts have thermally stabilized, so already a reconsolidation has occurred. If, therefore, in the selective case decided on closing, the switching contact does not fall into the liquid melt, but on an already re-solidified contact geometry. Welding the two switch contacts is then no longer possible and the circuit breaker can continue to operate normally.
- the circuit breaker according to the invention can thus be designed to limit current even at high rated currents greater than 630 A and still switch energy-selective.
- the branches can be designed for a lower short-circuit current, which is associated with cheaper devices and the like in the branch, smaller diameter of the lines and better protection of the entire system.
- the triggering of the actuator is advantageously carried out in two directions.
- FIG. 1 shows a portion of a circuit breaker in a schematic representation, which belongs to a power distribution system comprising at least two power switches, one of which is upstream of the power supply and arranged downstream of the at least one power switch (not shown).
- the circuit breaker in FIG. 1 comprises a contact system, which can be single-fingered as well as multi-fingered as well as double-rotatory and translatory. It has at least one fixed switching contact 1 and a movable switching contact 2, which is pivotable about an axis 3.
- the switching contact 2 is subjected to force by a spring 4 on the switch contact 1.
- a current sensor 5 By means of a current sensor 5, the current flowing through the switching contacts 1, 2 current is detected and the detected current value fed to a selective trigger 6, which calculates the associated energy value and compared with a Energyschwellwert (as a predetermined criterion).
- the Selektivauslöser 6 actuated in the case of triggering an actuator 7, which is here according to the double arrow from Selektivauslöser 6 up and down slidably.
- an actuator 7 which is here according to the double arrow from Selektivauslöser 6 up and down slidably.
- a pawl 8 a catch mechanism 9.
- a pawl 10 is actuated, which unlatches a switching mechanism 11.
- the pawls 8, 10 are each pivotally mounted about a pivot axis 8a, 10a.
- FIG. 2 further shows that the catching mechanism 9 holds the switching contact 2 upon reaching a predetermined opening angle w by means of the pawl 8 (latched) and thus prevents it from pivoting back.
- the existing of the two switching contacts 1, 2 contact system is designed so dynamic opening and is latched at the opening of the switch contact 2 here.
- the determined by the Selektivauslöser 6 energy value triggers when the Energyschwellwert the pawl 10 by actuation by means of the actuator 7 (shift upward in FIG. 2 ), ie the latching of the switching mechanism is released and the switching contacts 1, 2 are opened via a switching shaft of the switching mechanism 11 all-pole, so the power switch off.
- the actuator 7 triggers (downward shift in FIG FIG. 2 ) the pawl 8, actuated So the catch mechanism 9, which releases the movable switching contact 2 again. This causes the switching contact 2 falls due to the spring force of the spring 4 and closes the circuit breaker. The circuit breaker is then on again and selective.
- circuit-breakers> 630A since the magnetic forces above the lift-off limit (> 15kA peak for a 1000A switch) are so great that the full opening angle w (of the contact system) is reached.
- the selective trigger 6 mechanical or electronic detects the "dimension" of the short circuit and decides whether it must trigger selectively or not. This is achieved, for example, by means of the energy, the pressure or the forward current which is converted in the circuit breaker. If a defined tripping threshold (eg energy threshold value) is exceeded, a tripping signal is sent to the actuator 7 (eg magnetic).
- a defined tripping threshold eg energy threshold value
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Description
Die Erfindung betrifft ein Energieverteilungssystem mit vorgeordneten und nachgeordneten Leistungsschaltern gemäß dem Oberbegriff des Anspruchs 1. Das Dokument
Es ist bekannt, Leistungsschalter in der Energieverteilung einzusetzen und diese im Kurzschlussfall selektiv abschalten zu lassen, d. h. der vorgeordnete Leistungsschalter soll nur dann auslösen, wenn kein nachgeordneter Leistungsschalter den vom Kurzschluss betroffenen Abzweig trennen kann. Jeder Leistungsschalter weist bewegliche Schaltkontakte auf, die im Betrieb Strom durchflossen sind. Die beweglichen Schaltkontakte sind meist federkraftbeaufschlagt und werden durch die Federkraft an einen zugehörigen festen Schaltkontakt angedrückt gehalten. Der Strom wird so über die Schaltkontakte geführt, dass stromdynamisch Magnetkräfte erzeugt werden, die im Kurzschlussfall, also bei einem sehr steilen Stromanstieg, die Schaltkontakte trennen, wobei der bewegliche Schaltkontakt vom festen Schaltkontakt abhebt. Dabei entsteht zwischen den Schaltkontakten ein Lichtbogen, der dem Stromfluss einen Widerstand entgegensetzt, was mit einer Begrenzung des Stroms verbunden ist. Bekannt ist es weiter, den beweglichen Schaltkontakt bei Erreichen eines vorgegebenen Öffnungswinkels verrasten zu lassen, um ihn festzuhalten. Darüber hinaus verfügt jeder Leistungsschalter über einen Auslöser (Überlast-und Kurzschlussauslöser), der auslöst, wenn ein vorgegebener Schwellwert überschritten wird. Die Auslösung des Leistungsschalters erfolgt durch Entklinken eines Schaltschlosses, welches alle Schaltkontakte öffnet.It is known to use circuit breakers in the power distribution and to selectively disable them in the event of a short circuit, ie the upstream circuit breaker should only trigger when no downstream circuit breaker can separate the branch affected by the short circuit. Each circuit breaker has moving switch contacts, which are flowed through during operation current. The movable switch contacts are usually spring-loaded and are held pressed by the spring force to an associated fixed switch contact. The current is passed through the switch contacts that magnetic current forces are generated dynamically, which in the event of a short circuit, ie at a very steep increase in current, separate the switching contacts, wherein the movable switching contact lifts off from the fixed switching contact. This creates an arc between the switching contacts, which opposes the flow of current a resistance, which is associated with a limitation of the current. It is also known to lock the movable switching contact upon reaching a predetermined opening angle to hold it. In addition, each circuit breaker has a trigger (overload and short-circuit release), which triggers when a predetermined threshold is exceeded. The tripping of the circuit breaker takes place by unlatching a switching mechanism, which opens all switching contacts.
Die Strombegrenzung durch den Lichtbogen ermöglicht klein bauende Leistungsschalter und die Anlage auf das geringere Kurzschlussniveau auszulegen.The current limitation by the arc allows small-sized circuit breakers and the system to design the lower short-circuit level.
Speziell wird bei strombegrenzenden Kompaktschaltern für Ströme kleiner 630 A das selektive Verhalten durch sogenannte Energieselektivität erreicht. Dabei heben die Schaltkontakte stromdynamisch an der dimensionierten Abhebegrenze ab, wobei der mechanisch ausgebildete Selektivauslöser erst oberhalb eines vorgegebenen Schwellwertes reagiert und den Leistungsschalter auslöst. Als Schwellwert (Auslöseschwelle) dient z.B. der Schaltkammerdruck, welcher äquivalent zur Lichtbogenenergie ist. Unterhalb dieses Schwellwertes wird nach dem Abheben der Schaltkontakte nicht ausgelöst und die Schaltkontakte werden auf Grund der Federkraftbeaufschlagung wieder geschlossen, so das sich der Leistungsschalter wieder im eingeschalteten Zustand befindet und damit selektiv ist. Ein Fangmechanismus für die Schaltkontakte sorgt für eine Verrastung der beweglichen Schaltkontakte, um den Leistungsschalter bei sehr hohen Schaltleistungen zu schützen. Damit wird ein zu schnelles Zufallen der Schaltkontakte verhindert und der Kontakt offengehalten bis zur Mitnahme durch das ausgelöste Schaltschloss. Der Verrastpunkt des Fangmechanismus muss dabei konstruktiv mit dem Schwellwert des Selektivauslösers abgestimmt werden, so dass ein eindeutiger Schaltzustand sichergestellt ist. Der Selektivauslöser reagiert jeweils auch dann, wenn der Fangmechanismus bereits aktiv gewesen ist. Bei energieselektiven Leistungsschaltern reagiert der Selektivauslöser erst nach einer dynamischen Öffnung bzw. einem dynamischen Zufallen. Die Auslösung und damit die Schutzfunktion des Leistungsschalters erfolgen also verzögert, damit das Kontaktsystem bis zum Schwellwert öffnen und schließen kann, ohne dass eine Auslösung erfolgt.Specifically, in current-limiting compact switches for currents less than 630 A, the selective behavior is achieved by so-called energy selectivity. In this case, the switch contacts current-dynamically lift off at the dimensioned lift limit, wherein the mechanically trained selective release reacts only above a predetermined threshold and triggers the circuit breaker. The threshold value (triggering threshold) is, for example, the switching chamber pressure, which is equivalent to the arc energy. Below this threshold value is not triggered after lifting the switch contacts and the switch contacts are closed due to the Federkraftbeaufschlagung again, so that the circuit breaker is again in the on state and thus is selective. A catch mechanism for the switch contacts ensures a locking of the movable switch contacts to protect the circuit breaker at very high switching performance. This prevents the switching contacts from closing too quickly and the contact is kept open until it is picked up by the triggered switch lock. The Verrastpunkt the catch mechanism must be constructively matched with the threshold value of Selektivauslösers, so that a clear switching state is ensured. The Selective trigger reacts even if the capture mechanism has already been active. For energy-selective circuit breakers, the selective release only reacts after a dynamic opening or a dynamic closing. The tripping and thus the protective function of the circuit breaker are thus delayed, so that the contact system can open and close to the threshold without triggering.
Zeitselektive Leistungsschalter mit Nennströmen größer 630 A sind so dimensioniert, dass mehrere Halbwellen eines Kurzschlussstroms durchfließen können, ohne dass der Leistungsschalter zerstört wird. Dies ermöglicht es, jeweils die Reaktion eines vorgeordneten Leistungsschalters abzuwarten und nur bei Bedarf selektiv abzuschalten.Time-selective circuit-breakers with rated currents greater than 630 A are dimensioned so that several half-cycles of a short-circuit current can flow through without destroying the circuit breaker. This makes it possible to wait for the reaction of an upstream circuit breaker and to selectively switch it off only when necessary.
Energieselektivität, also eine Kombination aus dynamisch Strom begrenzendem Verhalten und einer selektiven Abschaltung ist bei Nennströmen größer 630 A nicht bekannt. Dies liegt an der Trägheit des Kontaktsystems als auch dem relativ hohen Energieumsatz im Leistungsschalter, was meist zum Verschweißen der Schaltkontakte beim dynamischen Öffnen und Schließen führt.Energy selectivity, ie a combination of dynamic current limiting behavior and a selective shutdown is not known at rated currents greater than 630 A. This is due to the inertia of the contact system as well as the relatively high energy consumption in the circuit breaker, which usually leads to welding of the switch contacts during dynamic opening and closing.
Die Aufgabe der Erfindung ist es, einen energieselektiven Leistungsschalter vorzuschlagen, der auch bei größeren Nennströmen einsetzbar ist und eine hohe Standzeit aufweist.The object of the invention is to propose an energy-selective circuit breaker, which can also be used with larger nominal currents and has a long service life.
Die Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst; die Unteransprüche stellen vorteilhafte Ausgestaltungen dar.The object is solved by the features of claim 1; the dependent claims represent advantageous embodiments.
Die Lösung sieht vor, dass ein vom Selektivauslöser auslösbarer Aktor vorgesehen ist, der den Fangmechanismus zur Freigabe des beweglichen Schaltkontakts betätigt, wenn eine Unterschreitung des Kriteriums vorliegt.The solution provides that a triggerable by the selective actuator actuator is provided, which actuates the catch mechanism for releasing the movable switch contact, when there is a drop below the criterion.
Eine einfache Lösung sieht vor, als Kriterium einen vorgegebenen Schwellwert zu verwenden.A simple solution is to use a given threshold as a criterion.
Eine Verbesserung ergibt sich, wenn der Aktor den Fangmechanismus jeweils nach einer vorgegebenen Verzögerungszeit freigibt.An improvement results when the actuator releases the catching mechanism after a predetermined delay time.
Als technische Vereinfachung wird vorgeschlagen, dass das Auslösen des Leistungsschalters über den Aktor erfolgt.As a technical simplification, it is proposed that the tripping of the circuit breaker takes place via the actuator.
Ein weiterer Vorteil ergibt sich, wenn der Leistungsschalter ein Schaltschloss aufweist, das zum Auslösen des Leistungsschalters vom Aktor entklinkt wird.Another advantage arises when the circuit breaker has a switching mechanism, which is unlatched to trigger the circuit breaker from the actuator.
Bei einer einfachen Ausführung weist der Fangmechanismus eine Verklinkung auf.In a simple embodiment, the catch mechanism has a latch.
Der Erfindungsgedanke ist also der, dynamisch öffnende verklinkbare Schaltkontakte mit einem Aktor zu kombinieren, der wiederum über einen Schwellwert getriggert wird. Mit der Erfindung wird also der Nachteil beseitigt, dass Leistungsschalter für Nennströme größer 630 A und dynamisch öffnenden Schaltkontakten verschweißen, indem verhindert wird, dass diese gleich wieder zufallen. Der bewegliche Schaltkontakt kann hochdynamisch öffnen und verklinken, während Selektivauslöser und Aktor dafür sorgen, dass ein Schließen des Schaltkontakts erst freigegeben wird, wenn sich die Schaltkontakte thermisch stabilisiert haben, also bereits eine Wiederverfestigung eingetreten ist. Wird also im Selektivfall auf Schließen entschieden, fällt der Schaltkontakt nicht in die flüssige Schmelze, sondern auf eine bereits wieder verfestigte Kontaktgeometrie. Ein Verschweißen der beiden Schaltkontakte ist dann nicht mehr möglich und der Leistungsschalter kann normal weiter betrieben werden. Der erfindungsgemäße Leistungsschalter kann also auch bei hohen Nennströmen größer 630 A strombegrenzend ausgelegt sein und trotzdem energieselektiv schalten. Dadurch können die Abzweige für einen geringeren Kurzschlussstrom ausgelegt werden, was mit kostengünstigeren Geräten und dergleichen im Abzweig, geringerem Durchmesser der Leitungen und besserem Schutz der gesamten Anlage verbunden ist.The idea of the invention is therefore to combine dynamically opening latchable switch contacts with an actuator, which in turn is triggered by a threshold value. The invention thus eliminates the disadvantage that circuit breakers for rated currents greater than 630 A and dynamically opening switch contacts weld by preventing them from falling over again. The movable switch contact can open and latch highly dynamically, while Selektivauslöser and actor ensure that a closing of the switch contact is released only when the switch contacts have thermally stabilized, so already a reconsolidation has occurred. If, therefore, in the selective case decided on closing, the switching contact does not fall into the liquid melt, but on an already re-solidified contact geometry. Welding the two switch contacts is then no longer possible and the circuit breaker can continue to operate normally. The circuit breaker according to the invention can thus be designed to limit current even at high rated currents greater than 630 A and still switch energy-selective. As a result, the branches can be designed for a lower short-circuit current, which is associated with cheaper devices and the like in the branch, smaller diameter of the lines and better protection of the entire system.
Die Triggerung des Aktors erfolgt zweckmäßigerweise in zwei Richtungen.The triggering of the actuator is advantageously carried out in two directions.
Die Erfindung wird nachfolgend anhand einer Zeichnung näher beschrieben. Es zeigen:
- Figur 1
- eine schematische Darstellung eines geschlossenen Leistungsschalters mit einem beweglichem und einem feststehenden Schaltkontakt und
Figur 2- einen geöffneten Leistungsschalter gemäß
Figur 1 .
- FIG. 1
- a schematic representation of a closed circuit breaker with a movable and a fixed switching contact and
- FIG. 2
- an opened circuit breaker according to
FIG. 1 ,
Der Leistungsschalter in
Im Kurzschlussfall bewirkt der durch die Stromkontakte 1, 2 fließende Strom stromdynamisch erzeugte Magnetkräfte, durch welche sich die Stromkontakte 1, 2 voneinander abstoßen. Dabei hebt der bewegliche Stromkontakt 2 vom feststehenden Stromkontakt 1 ab, d. h. der Stromkontakt 2 in
Der beim Öffnen der Schaltkontakte 1, 2 zwischen diesen entstehende Lichtbogen führt zu einer Strombegrenzung.The resulting when opening the
Wird der Energieschwellwert unterschritten, beispielsweise weil der nachgeordnete oder einer der nachgeordneten Leistungsschalter abgeschaltet hat, so löst der Aktor 7 (Verschiebung nach unten in
Um einen energieselektiven Leistungsschalter zu erzielen, der auch bei größeren Nennströmen einsetzbar ist und eine hohe Standzeit aufweist, werden also stromdynamisch öffnende Schaltkontakte 2 vorgeschlagen, die bei der Öffnung verklinkt werden. Der von einem Selektivauslöser 6 getriggerte Aktor 7 wird über einen Energieschwellwert in zwei Positionen bewegt und ermöglicht dadurch entweder ein Schließen oder ein Öffnen der Schaltkontakte 1, 2. Der Leistungsschalter wird so dimensioniert, dass die Schaltkontakte 1, 2 (bei Mehrfingersystemen alle einzelnen Schaltkontakte) im Kurzschlussfall eigendynamisch (durch die Holm- und Lorenzkräfte) öffnen. Der Fangmechanismus 9 verklinkt die Schaltkontakte 2 (deren Kontaktarme) in der geöffneten Position. Dies wird bei Leistungsschaltern >630A sicher erreicht, da die magnetischen Kräfte oberhalb der Abhebegrenze (>15kA peak bei einem 1000A Schalter) so groß sind, dass der volle Öffnungswinkel w (des Kontaktsystems) erreicht wird. Hierdurch wird eine sehr schnelle Strombegrenzung im Kurzschlussfall realisiert. Der Selektivauslöser 6 (mechanisch oder elektronisch) erkennt die "Dimension" des Kurzschlusses und entscheidet, ob er selektiv Auslösen muss oder nicht. Dies gelingt beispielsweise anhand der im Leistungsschalter umgesetzten Energie, des Drucks oder des Durchlassstroms. Wird eine definierte Auslöseschwelle (z.B. Energieschwellwert) überschritten, erfolgt ein Auslösesignal an den Aktor 7 (z.B. magnetisch). Dieser entklinkt den Antrieb z.B. für das Schaltschloss 11 und öffnet über dessen Schaltwelle die Schaltkontakte 1, 2, d.h. der Leistungsschalter hat den Kurzschluss abgeschaltet. Wird die Auslöseschwelle nicht überschritten, dass heißt es liegt der Selektivfall vor, wird ein Signal an einen Aktor 7 gegeben, welcher die Verklinkung der Schaltkontakte 1, 2 wieder löst. Durch die gespannten Federn 4 schließen sich die Schaltkontakte 1, 2 wieder, d.h. der Leistungsschalter schaltet nicht selektiv ab und der zugehörige Abzweig wird nicht vom Strom getrennt.In order to achieve an energy-selective circuit breaker, which can also be used with larger rated currents and has a long service life, so current-dynamically opening
Claims (7)
- Power distribution system comprising at least one circuit breaker arranged upstream from the viewpoint of the power supply and at least one circuit breaker arranged downstream, comprising at least one movable switch contact (2) through which current flows and which lies, with a force applied, against an associated fixed switch contact (1) and in the event of a short-circuit-like current increase is lifted therefrom by current-generated magnetic forces, wherein an arc is formed in each case between the two switch contacts (1, 2) and acts to limit the current,
characterised by
a catch mechanism (9) which fixes the movable switch contact (2) on reaching a predetermined opening angle (w), and
having a selective trigger (6) for triggering the associated circuit breaker on exceeding a predetermined criterion, wherein
an actuator (7) which can be triggered by the selective trigger (6) is provided, said actuator actuating the catch mechanism (9) for releasing the movable switch contact (2) when a criterion is undershot. - Power distribution system according to claim 1,
characterised in that
the criterion is a predetermined threshold value. - Power distribution system according to claim 1 or 2,
characterised in that
the actuator (7) releases the catch mechanism (9) after a predetermined delay time in each case. - Power distribution system according to one of the claims 1-3,
characterised in that
the triggering of the circuit breaker is carried out by means of the actuator (7). - Power distribution system according to one of the claims 1-4, characterised in that the circuit breaker has a breaker mechanism (11) which is unlatched by the actuator (7) to trigger the circuit breaker.
- Power distribution system according to one of the claims 1-5,
characterised in that
the catch mechanism (9) has a latching mechanism. - Power distribution system according to one of the claims 1-6,
characterised in that
the selective trigger (6) is configured as an electronic selective trigger or as a current-dependent magnetic hinged armature.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910012650 DE102009012650A1 (en) | 2009-03-11 | 2009-03-11 | Power distribution system |
PCT/EP2010/052263 WO2010102899A1 (en) | 2009-03-11 | 2010-02-23 | Power distribution system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2406804A1 EP2406804A1 (en) | 2012-01-18 |
EP2406804B1 true EP2406804B1 (en) | 2013-07-31 |
Family
ID=42173266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10710813.6A Not-in-force EP2406804B1 (en) | 2009-03-11 | 2010-02-23 | Power distribution system |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2406804B1 (en) |
CN (1) | CN102349128B (en) |
DE (1) | DE102009012650A1 (en) |
WO (1) | WO2010102899A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0563774B1 (en) * | 1992-03-31 | 1999-05-19 | Ellenberger & Poensgen GmbH | Protective circuit breaker with remote control |
FR2739220B1 (en) * | 1995-09-22 | 1997-12-12 | Dudon Pascal | DEVICE FOR CONTROLLING ELECTRICAL LINE BREAKING MEANS |
JP4321296B2 (en) * | 2004-02-19 | 2009-08-26 | 富士電機機器制御株式会社 | Repulsive circuit breaker contactor device |
CN201075362Y (en) * | 2007-03-30 | 2008-06-18 | 赛雪龙公司 | Electronic mechanical type breaker |
-
2009
- 2009-03-11 DE DE200910012650 patent/DE102009012650A1/en not_active Withdrawn
-
2010
- 2010-02-23 WO PCT/EP2010/052263 patent/WO2010102899A1/en active Application Filing
- 2010-02-23 CN CN201080011259.6A patent/CN102349128B/en not_active Expired - Fee Related
- 2010-02-23 EP EP10710813.6A patent/EP2406804B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
WO2010102899A1 (en) | 2010-09-16 |
EP2406804A1 (en) | 2012-01-18 |
CN102349128B (en) | 2015-02-11 |
DE102009012650A1 (en) | 2010-09-16 |
CN102349128A (en) | 2012-02-08 |
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