EP1266387B1 - Auslösevorrichtung für einen leistungsschalter - Google Patents

Auslösevorrichtung für einen leistungsschalter Download PDF

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Publication number
EP1266387B1
EP1266387B1 EP01933716A EP01933716A EP1266387B1 EP 1266387 B1 EP1266387 B1 EP 1266387B1 EP 01933716 A EP01933716 A EP 01933716A EP 01933716 A EP01933716 A EP 01933716A EP 1266387 B1 EP1266387 B1 EP 1266387B1
Authority
EP
European Patent Office
Prior art keywords
lever
tripping
blow
accordance
out channel
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.)
Expired - Lifetime
Application number
EP01933716A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1266387A1 (de
Inventor
Gerd Jodehl
Walter Felden
Gabor Henrichs
Rolf-Dieter Bauer
Stefan Kranz
Christian-Alfons Thamm
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.)
AEG Niederspannungstechnik GmbH and Co KG
Original Assignee
AEG Niederspannungstechnik GmbH and Co KG
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 AEG Niederspannungstechnik GmbH and Co KG filed Critical AEG Niederspannungstechnik GmbH and Co KG
Publication of EP1266387A1 publication Critical patent/EP1266387A1/de
Application granted granted Critical
Publication of EP1266387B1 publication Critical patent/EP1266387B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H2077/025—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with pneumatic means, e.g. by arc pressure
    • 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
    • H01H9/342—Venting arrangements for arc chutes

Definitions

  • the invention relates to a tripping device for a circuit breaker.
  • a circuit breaker which is equipped with contacts for quick shutdown by electrodynamic repulsion in the event of a short circuit.
  • the quick shutdown creates an arc drawn between the contacts, which causes a rapid increase in pressure in the housing receiving the contacts.
  • a pressure chamber is connected to the housing, so that the pressure in the pressure chamber also increases in the formation of the arc.
  • the pressure chamber is closed with a displaceable piston from the environment, so that the piston is displaced by the pressure rise in the pressure chamber.
  • the piston is operatively connected to a shut-off device, so that the circuit breaker is turned off by the pressure increase.
  • a generic tripping device from the US 3,631,369 known.
  • a deflectable against spring force bimetallic element which carries a support for holding the switching mechanism in the closed position of the contacts of the circuit breaker is provided at its one end with a storage area which projects into a blow-out.
  • the bimetallic element is deflected by a gas impact on the storage area and releases the switch lock to disconnect the contacts.
  • the invention has for its object to provide a triggering device that allows greater dimensional tolerances in the production without the reliability is reduced.
  • Fig. 1 is a partially sectioned perspective view of an illustrative example is shown.
  • Fig. 1 shows a housing which is assembled from two housing half-shells.
  • the housing encloses a cavity in which the electrical elements of the circuit breaker are accommodated.
  • the housing has various bearing points for elements to be stored, which will be explained later.
  • Generally means mounted on the housing in the following description that corresponding bearing pins, openings etc. are formed on the housing.
  • the housing is made of an insulating material, preferably made of a plastic.
  • Fig. 1 also shows a contact carrier 22 in the housing with a fixed contact 20 mounted thereon of the circuit breaker 1.
  • a fixed contact 20 associated with this movable contact omitted for the sake of clarity here.
  • the circular pole paths of the movable contact formed as a rotatable contact bridge are formed in the housing wall and can be seen in FIG.
  • circular bearing openings are formed on the housing, which rotatably hold the rotatable contact
  • the switch 1 further has a triggering shaft 2 as the triggering member, which is operatively connected to the movable contact to separate it from the fixed contact 20 in a tripping operation.
  • the circuit breaker has a disconnect device (not shown) that is operatively connected to the contact bridge.
  • the shutdown device may be a switch lock, a latch mechanism or the like.
  • the shutdown device is operatively connected to the trip shaft 2. If the trip shaft 2 is actuated (rotated) in the release direction, the disconnection device rotates the contact bridge around the bearing points on the housing and separates the fixed contacts 20 and the movable contacts (not shown) from each other. This breaks the circuit through the circuit breaker.
  • the shut-off device also has a mechanism that allows the contacts to be closed again after the circuit breaker has tripped and the cause for tripping has been removed.
  • the fixed contact 20 is associated with an arc quenching chamber 4 (hereinafter referred to as quenching chamber). Starting from the extinguishing chamber 4 extends Outlet passage 6 in Fig. 1 substantially parallel to the lower horizontal housing edge to the outside of the housing.
  • the blow-out channel 6 is partially bounded by the walls of the housing and is formed on the side facing away from the operating side of the circuit breaker side of the housing.
  • the exhaust duct preferably opens at an end face of the housing, so that a plurality of housings can be mounted side by side without obstructing each other, the exhaust ducts. The function of the blow-out duct and the arc chamber will be explained later.
  • a storage area 14 is formed, which blocks the cross-section or the cross-sectional area of the Ausblaskanals 6 at least partially.
  • the lever 10 is rotatably or pivotally mounted in a pivot point 80 on the housing.
  • a second lever arm 18 of the lever 10 is formed integrally with the first lever arm 8 and has at its end remote from the pivot 80 a driver 12 is formed.
  • the driver 12 is arranged opposite a stop 16 and designed for a tripping operation with the stop 16, which is formed on the trip shaft 2, to come into abutment and to take this at a release movement.
  • the trip shaft 2 can move independently of the driver 12 in its release direction. Consequently, it is possible that the triggering shaft 2 can be actuated by another triggering member, without being influenced by the lever 10 (driver 12).
  • the lever arm 18 of the lever 10 is made double, i. the lever arm 18 has a substantially U-shaped configuration (in FIG. 1 an inverted "U").
  • the ends of the legs of the "U” are rotatably held at the mutually aligned pivot points 80, while the base of the "U” forms the rod-shaped carrier 12.
  • the legs of the U-shaped lever arm 18 are also C-shaped curved, so that the engagement location of the driver 12 is offset with the stop 16 against the pivot points 80 of the lever arm 18 in Fig. 1 to the right.
  • Fig. 1 the lever arm 18 has a substantially U-shaped configuration (in FIG. 1 an inverted "U”).
  • the ends of the legs of the "U” are rotatably held at the mutually aligned pivot points 80, while the base of the "U” forms the rod-shaped carrier 12.
  • the legs of the U-shaped lever arm 18 are also C-shaped curved, so that the engagement location of the driver 12 is offset with the stop 16 against the pivot points 80 of the lever
  • the rest position of the lever 10 is shown, wherein the C-shaped curvature of the lever arm 18, the rest position of the lever 10 so aligned that the storage surface 14 significantly narrows the discharge channel 6 and almost closes.
  • the storage surface 14 is arranged substantially transversely to the flow direction in the exhaust duct.
  • the storage area 14 can also be arranged outside the discharge channel 6 in the vicinity of its opening into the environment. It is sufficient if the storage area 14 can be acted upon by a pressure surge in the exhaust duct 6.
  • the rest position of the lever 10 is adjusted as shown in FIG. 1 by the lever shape and the equilibrium conditions of the weight forces on the lever 10 suitable.
  • the rest position can also be by a resilient element (not shown) be ensured.
  • This spring element may be a coil spring as a tension or compression spring, a spring tongue on the housing or lever or even a simple molded tongue when the lever or the housing are injection-molded.
  • the lever 10 may also be designed so that it abuts both in the rest position and in the triggered position on the stop 16 of the trip shaft with a small force.
  • FIG. 2 shows the switch of FIG. 1 in a partial side view.
  • the movable contact or the contact bridge is also omitted in FIG. 2 for the sake of clarity.
  • the movable contact moves by electrodynamic repulsion from the fixed contact 20 in Fig. 2 downwards.
  • the electrodynamic repulsion is effected by the magnetic fields around the contact carrier 22 (lower horizontal portion) and arranged parallel to the contact carrier 22 contact bridge (not shown) when the fixed contact 20 and the movable contact (not shown) are closed at the contact bridge.
  • a high current flows through the circuit breaker, current flows through two parallel conductors (contact holder and contact bridge) in the opposite direction. Around the conductors arise magnetic fields in the same direction, which repel each other.
  • the power goes high, the Magnetic fields so strong that they press apart the contacts against the closing force of the contacts.
  • the closing force is applied by a spring mechanism.
  • the arc spanned between the movable contact (not shown) and the fixed contact 20 during separation generates a very rapid increase in pressure (about 0.5 ms) of the air in the quenching chamber 4. This pressure increase creates a pressure wave that propagates through the exhaust passage 6.
  • the blow-out 6 is connected to the environment to release the pressure in the form of the pressure wave in the environment.
  • the very fast pressure wave strikes the storage area 14 during its movement through the discharge channel 6, which narrows the cross-section of the discharge channel 6.
  • the storage area 14 deviates due to the resulting dynamic pressure, i. due to the pressure difference on the front side and the rear side of the storage surface, toward the environment-side end of the blow-out channel 6 (to the right in FIG. 2).
  • the storage surface 14 is arranged, pivoted in Fig. 2 to the right.
  • the storage area 14 is exposed to the pressure wave, ie, no sealing between the storage area 14 and the discharge channel 6 is required.
  • the deflection of the storage surface 14 is carried out essentially by converting the kinetic energy of the pressure wave in the dynamic pressure on the storage area 14. With others In other words, the deflection of the lever through the storage area is dynamic.
  • An arrangement of the storage area 14 in the exhaust duct 6, the effect of the storage area 14 further increase, because the pressure wave is better directed to the storage area.
  • the lever 10 rotates counterclockwise in Fig. 2 about its pivot point 80 on the housing.
  • the second lever arm 18 on the other side of the pivot point 80 pivots in Fig. 2 to the left.
  • This triggers the circuit breaker, i. the movable contact (not shown) and the fixed contact 20 are further removed from each other and electrically separated by rotating the contact bridge through the disconnecting device, such as a switching mechanism, a latch mechanism or the like.
  • the arc between the contacts tears off and extinguished in the quenching chamber. 4
  • the length ratios of the first lever arm 8 and the second lever arm 18 are selected so that a deflection of the first lever arm 8 with a small force causes a deflection of the second lever arm 18 with a large force. More specifically, the first lever arm 8 is substantially longer than the second lever arm 18. As a result, a force can be applied by the driver 12 on the trip shaft 2, the reliably sufficient for triggering the circuit breaker.
  • the lever paths of the first and second lever arms are in inverse proportion to the leverage. The pressure wave propagates with almost the same force through the exhaust duct 6, so that the storage surface 14 is always acted upon by the resulting longer lever travel of the first lever arm 8 with the differential pressure and correspondingly can produce the larger force on the second lever arm 18 easily.
  • a lever 10 with a storage surface 14 can be assigned to each blow-out channel of the switch.
  • this can be achieved with individual levers, each with a storage area in each case a blow-out each pole.
  • a single lever may be connected to a plurality of storage surfaces, each associated with a blow-out channel.
  • the connection of the individual storage areas with each other can be done for example by suitable slot openings in the side surfaces of the exhaust ducts.
  • a simple solution is also the arrangement of a lever with multiple storage areas at the respective surrounding openings of the blow-out, ie simply a storage area at the end of each blow-out.
  • the design of the lever, the connection of the storage area and the design of the Ausblaskanäle be simplified.
  • the storage areas may be designed as flaps closing the blow-out passages, which can prevent ingress of foreign materials.
  • This embodiment differs from the preceding explanatory example in the arrangement of the storage area and the lever arrangement for transmitting power to the tripping shaft as the trigger member, so that here mainly the deviations are described to the exemplary embodiment.
  • Fig. 3 shows a side view of a portion of a circuit breaker in the undelivered state
  • Fig. 4 shows the same view in the tripped state of the circuit breaker.
  • a quenching chamber is shown, which is associated with a contact pair (not shown).
  • the quenching chamber is connected via a blow-out 6 in connection with the environment.
  • a storage surface 14 is arranged, which is connected to a rotatable shaft 80.
  • a arranged on the shaft 80 lever extension 18 forms a second lever arm 18 of a lever 10, the first lever arm is formed by the storage area 14.
  • the cam follower 100 is in one Fulcrum 800 rotatably attached to the housing.
  • the hinge 110 is configured such that rotation of the lever 10 clockwise about the shaft 80 causes pivotal movement of the finger lever 100 counterclockwise about the pivot point 800. The same applies to the reversal of the directions of rotation.
  • the drag lever 100 has formed on its second Schlepphebelarm 118 a driver 12 which can cooperate with an associated stop 16 of the trip shaft 2 to trigger the circuit breaker.
  • the engagement between the driver 12 and the stop 16 is analogous to the example of the example, so that a repetition is dispensed with here.
  • the hinge 110 and / or the engagement between the driver 12 and stop 16 may be designed so that the two levers 10 and 100 remain in the release position when the circuit breaker has been triggered by the pressure wave. As a result, this triggering case can simply be made visible on the housing by corresponding identification (color marking, viewing window or the like). Furthermore, the hinge can be formed not only by a lever end received between two pins, but also, for example, by a film hinge, which is formed during injection molding of lever 10 and drag lever 100.
  • the leverage ratios are selected so that a sufficient release force on the driver 12 of the finger lever 100 is generated.
  • FIG. 3 or FIG. 4 is also suitable for multi-pole circuit breakers which have a plurality of blow-out channels corresponding to the number of poles.
  • the rotary shaft 80 a plurality of storage surfaces can be connected to each other in or on the individual Ausblaskanälen by the rotary shaft is guided by holes in the side walls of the respective Ausblaskanäle.
  • a simple mounting of the rotary shaft and a relatively good sealing of the individual blow-out channels is achieved against each other, so that an effective pressure wave in each of the blow-out can be maintained.
  • the storage areas may be located at the ends of the discharge channels and / or outside thereof, as previously explained with reference to FIG.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP01933716A 2000-03-17 2001-03-16 Auslösevorrichtung für einen leistungsschalter Expired - Lifetime EP1266387B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10013099 2000-03-17
DE10013099A DE10013099B4 (de) 2000-03-17 2000-03-17 Auslösevorrichtung für einen Leistungsschalter
PCT/EP2001/003034 WO2001069630A1 (de) 2000-03-17 2001-03-16 Auslösevorrichtung für einen leistungsschalter

Publications (2)

Publication Number Publication Date
EP1266387A1 EP1266387A1 (de) 2002-12-18
EP1266387B1 true EP1266387B1 (de) 2007-08-22

Family

ID=7635151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01933716A Expired - Lifetime EP1266387B1 (de) 2000-03-17 2001-03-16 Auslösevorrichtung für einen leistungsschalter

Country Status (6)

Country Link
EP (1) EP1266387B1 (zh)
CN (1) CN1230853C (zh)
AT (1) ATE371258T1 (zh)
DE (2) DE10013099B4 (zh)
PL (1) PL198870B1 (zh)
WO (1) WO2001069630A1 (zh)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009010227A1 (de) 2009-02-24 2010-08-26 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
DE102009010229A1 (de) 2009-02-24 2010-08-26 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
DE102009010900A1 (de) 2009-02-27 2010-09-02 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
DE102009015222A1 (de) 2009-03-31 2010-10-07 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
WO2010112420A1 (de) 2009-03-31 2010-10-07 Siemens Aktiengesellschaft Auslöser für eine elektrische schaltanordnung
DE102011077359A1 (de) * 2011-06-10 2012-12-13 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4202321B2 (ja) * 2002-09-12 2008-12-24 浙江正泰電器股▲ふん▼有限公司 快速トリップ機能付きの低電圧断路器
DE102012200662A1 (de) * 2012-01-18 2013-07-18 Siemens Aktiengesellschaft Schaltvorrichtung für ein elektrisches Schaltgerät
JP6858881B2 (ja) * 2017-10-20 2021-04-14 三菱電機株式会社 遮断器
DE102017131442B4 (de) 2017-12-29 2023-11-23 Eaton Electrical Ip Gmbh & Co. Kg Ein- oder mehrpoliger Leistungsschalter und modulares System umfassend einen solchen Leistungsschalter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631369A (en) * 1970-04-27 1971-12-28 Ite Imperial Corp Blowoff means for circuit breaker latch
FR2661776B1 (fr) * 1990-05-04 1996-05-10 Merlin Gerin Declencheur instantane d'un disjoncteur.
FR2682530B1 (fr) * 1991-10-15 1993-11-26 Merlin Gerin Gamme de disjoncteurs basse tension a boitier moule.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009010227A1 (de) 2009-02-24 2010-08-26 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
DE102009010229A1 (de) 2009-02-24 2010-08-26 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
DE102009010900A1 (de) 2009-02-27 2010-09-02 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
DE102009015222A1 (de) 2009-03-31 2010-10-07 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
WO2010112420A1 (de) 2009-03-31 2010-10-07 Siemens Aktiengesellschaft Auslöser für eine elektrische schaltanordnung
DE102009015126A1 (de) 2009-03-31 2010-10-14 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
US8553385B2 (en) 2009-03-31 2013-10-08 Siemens Aktiengesellschaft Release for an electric switching arrangement
DE102011077359A1 (de) * 2011-06-10 2012-12-13 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
US8947182B2 (en) 2011-06-10 2015-02-03 Siemens Aktiengesellschaft Release for an electrical switching arrangement

Also Published As

Publication number Publication date
DE10013099B4 (de) 2004-08-26
EP1266387A1 (de) 2002-12-18
PL198870B1 (pl) 2008-07-31
WO2001069630A1 (de) 2001-09-20
CN1230853C (zh) 2005-12-07
DE10013099A1 (de) 2001-10-04
PL357826A1 (en) 2004-07-26
DE50112908D1 (de) 2007-10-04
ATE371258T1 (de) 2007-09-15
CN1418369A (zh) 2003-05-14

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