EP2406804B1 - Système de distribution d'énergie - Google Patents

Système de distribution d'énergie Download PDF

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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.)
Not-in-force
Application number
EP10710813.6A
Other languages
German (de)
English (en)
Other versions
EP2406804A1 (fr
Inventor
Sebastian Aukofer
Wolfgang Erven
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2406804A1 publication Critical patent/EP2406804A1/fr
Application granted granted Critical
Publication of EP2406804B1 publication Critical patent/EP2406804B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • 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
    • 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

Landscapes

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

Claims (7)

  1. Système de distribution d'énergie comprenant, vu depuis le point d'injection d'énergie, au moins un commutateur de puissance monté en amont et au moins un commutateur de puissance monté en aval, qui possèdent au moins un contact de commutation mobile (2) parcouru par le courant, qui est appliqué, sous l'action d'une force, contre un contact de commutation fixe (1) correspondant et qui, en cas de montée du courant à la manière d'un court-circuit, est détaché de ce dernier par des forces magnétiques générées de façon dynamique par le courant, étant précisé qu'il se produit à chaque fois un arc électrique entre les deux contacts de commutation (1, 2), qui a pour effet de limiter le courant ;
    caractérisé par
    un mécanisme de blocage (9) qui immobilise le contact de commutation mobile (2) lorsqu'un angle d'ouverture (w) prédéfini est atteint, et
    un déclencheur sélectif (6) destiné à déclencher le commutateur de puissance correspondant en cas de dépassement d'un critère prédéfini,
    un actionneur (7) déclenchable par le déclencheur sélectif (6) étant prévu, lequel actionne le mécanisme de blocage (9) afin de libérer le contact de commutation mobile (2) si le critère est dépassé vers le bas.
  2. Système de distribution d'énergie selon la revendication 1,
    caractérisé en ce que
    le critère est une valeur seuil prédéfinie.
  3. Système de distribution d'énergie selon la revendication 1 ou la revendication 2,
    caractérisé en ce que
    l'actionneur (7) libère le mécanisme de blocage (9) chaque fois après un temps de retard prédéfini.
  4. Système de distribution d'énergie selon l'une des revendications 1 à 3,
    caractérisé en ce que
    le déclenchement du commutateur de puissance se fait par l'intermédiaire de l'actionneur (7).
  5. Système de distribution d'énergie selon l'une des revendications 1 à 4,
    caractérisé en ce que
    le commutateur de puissance comprend un verrou de commutation (11) lequel est déverrouillé par l'actionneur (7) afin de déclencher le commutateur de puissance.
  6. Système de distribution d'énergie selon l'une des revendications 1 à 5,
    caractérisé en ce que
    le mécanisme de blocage (9) comprend un verrouillage.
  7. Système de distribution d'énergie selon l'une des revendications 1 à 6,
    caractérisé en ce que
    le déclencheur sélectif (6) est conçu sous forme de déclencheur sélectif électronique ou sous forme d'armature battante dépendante du courant.
EP10710813.6A 2009-03-11 2010-02-23 Système de distribution d'énergie Not-in-force EP2406804B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910012650 DE102009012650A1 (de) 2009-03-11 2009-03-11 Energieverteilungssystem
PCT/EP2010/052263 WO2010102899A1 (fr) 2009-03-11 2010-02-23 Système de distribution d'énergie

Publications (2)

Publication Number Publication Date
EP2406804A1 EP2406804A1 (fr) 2012-01-18
EP2406804B1 true EP2406804B1 (fr) 2013-07-31

Family

ID=42173266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10710813.6A Not-in-force EP2406804B1 (fr) 2009-03-11 2010-02-23 Système de distribution d'énergie

Country Status (4)

Country Link
EP (1) EP2406804B1 (fr)
CN (1) CN102349128B (fr)
DE (1) DE102009012650A1 (fr)
WO (1) WO2010102899A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0563774B1 (fr) * 1992-03-31 1999-05-19 Ellenberger & Poensgen GmbH Disjoncteur de protection avec commande à distance
FR2739220B1 (fr) * 1995-09-22 1997-12-12 Dudon Pascal Dispositif de commande de moyens de coupure de ligne electrique
JP4321296B2 (ja) * 2004-02-19 2009-08-26 富士電機機器制御株式会社 反発形回路遮断器の接触子装置
CN201075362Y (zh) * 2007-03-30 2008-06-18 赛雪龙公司 电子机械式断路器

Also Published As

Publication number Publication date
WO2010102899A1 (fr) 2010-09-16
EP2406804A1 (fr) 2012-01-18
CN102349128B (zh) 2015-02-11
CN102349128A (zh) 2012-02-08
DE102009012650A1 (de) 2010-09-16

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