EP1266387A1 - Dispositif de declenchement pour disjoncteur - Google Patents

Dispositif de declenchement pour disjoncteur

Info

Publication number
EP1266387A1
EP1266387A1 EP01933716A EP01933716A EP1266387A1 EP 1266387 A1 EP1266387 A1 EP 1266387A1 EP 01933716 A EP01933716 A EP 01933716A EP 01933716 A EP01933716 A EP 01933716A EP 1266387 A1 EP1266387 A1 EP 1266387A1
Authority
EP
European Patent Office
Prior art keywords
lever
blow
trigger
out channel
housing
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
EP01933716A
Other languages
German (de)
English (en)
Other versions
EP1266387B1 (fr
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/fr
Application granted granted Critical
Publication of EP1266387B1 publication Critical patent/EP1266387B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/12Automatic release mechanisms with or without manual release
    • H01H71/24Electromagnetic mechanisms
    • H01H71/2418Electromagnetic mechanisms combined with an electrodynamic current limiting mechanism
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/12Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20Bridging contacts
    • H01H1/2041Rotating bridge
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02Protective 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
    • H01H2077/025Protective 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/342Venting arrangements for arc chutes

Definitions

  • the invention relates to a
  • Tripping device for a circuit breaker Tripping device for a circuit breaker.
  • a circuit breaker is known from EP 0583 149 Bl, which is equipped with contacts for quick disconnection by electrodynamic repulsion in the event of a short circuit. In the case of the rapid shutdown, an arc is drawn between the contacts, which causes a rapid increase in pressure in the housing accommodating the contacts.
  • EP 0583 149 Bl which is equipped with contacts for quick disconnection by electrodynamic repulsion in the event of a short circuit. In the case of the rapid shutdown, an arc is drawn between the contacts, which causes a rapid increase in pressure in the housing accommodating the contacts.
  • the circuit breaker has a pressure chamber connected to the housing, so that the pressure in the pressure chamber also rises when the arc is formed.
  • the pressure chamber is closed with a displaceable piston from the surroundings, so that the piston is displaced by the pressure increase in the pressure chamber.
  • the piston is operatively connected to a switch-off device, so that the circuit breaker is switched off by the pressure increase.
  • a tripping device for a circuit breaker which has contacts arranged in a housing, which by actuating a tripping element
  • Switch-off device are separable.
  • a blow-out channel assigned to the contacts is formed in the housing.
  • a lever is operatively connected to the release link and has a storage surface which is assigned to the blow-out channel and which deflects the lever following a pressure surge in the blow-out channel to actuate the release link.
  • Figure 1 is a schematic perspective partial view of a first embodiment of the invention.
  • FIG. 2 shows a schematic side view of a section of the device according to FIG. 1 to explain the invention
  • FIG. 3 shows a schematic side view of a section of a second exemplary embodiment of the invention in the non-triggered state of the triggering device
  • Fig. 4 is a Fig. 3 corresponding view in the triggered state of the trigger device.
  • Fig. 1 shows a partially sectioned perspective view of a first exemplary embodiment of the invention.
  • 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.
  • mounted on the housing means that corresponding bearing journals, openings, etc. are formed on the housing.
  • the housing is made of an insulating material, preferably a plastic.
  • Fig. 1 also shows a contact carrier 22 in the housing with an attached thereto
  • a movable contact assigned to this fixed contact 20 is omitted here for the sake of clarity.
  • the circular pole tracks of the movable contact designed as a rotatable contact bridge are formed in the housing wall and can be seen in FIG. 1.
  • circular bearing openings are formed on the housing, which rotatably hold the rotatable contact bridge.
  • the switch 1 also has a trigger shaft 2 as the trigger member which is operatively connected to the movable contact in order to separate it from the fixed contact 20 during a triggering process.
  • the circuit breaker has a disconnection device (not shown) which is operatively connected to the contact bridge.
  • the shutdown device can be a key switch, a ratchet mechanism or the like.
  • the switch-off device is operatively connected to the trigger shaft 2. If the release shaft 2 is actuated (rotated) in the release direction, the switch-off device rotates the contact bridge around the
  • the tripping device also has a mechanism with which the contacts can be closed again after the circuit breaker has tripped and the cause of the tripping has been eliminated.
  • the fixed contact 20 is an arc quenching chamber 4
  • quenching chamber (hereinafter referred to as quenching chamber) assigned.
  • Blow-out duct 6 is partially delimited by the walls of the housing and is formed on the side of the housing facing away from an operating side of the circuit breaker.
  • the blow-out duct preferably opens at one end of the housing, so that a plurality of housings can be attached next to one another without mutually blocking the blow-out ducts.
  • the function of the blow-out duct and the arc chamber will be explained later.
  • a first lever arm 8 of a lever 10 projects into the blow-out duct 6, and a storage surface 14 is formed on the end of the lever in the blow-out duct 6 that at least partially blocks the cross-section or cross-sectional area of the blow-out duct 6.
  • the lever 10 is rotatably or pivotally mounted on the housing at a pivot point 80.
  • a second lever arm 18 of the lever 10 is formed in one piece with the first lever arm 8 and has a driver 12 at its end remote from the pivot point 80.
  • the driver 12 is arranged opposite a stop 16 and designed for a release process with the stop 16, which on the
  • Trigger shaft 2 is designed to come into contact and take it with you during a trigger movement. Due to the design as a driver 12, which acts on a stop 16 in the release direction of the release shaft 2, the release shaft 2 can move independently of the driver 12 in its release direction. Consequently, it is possible that the trigger shaft 2 can be actuated by another trigger member, without being influenced by the lever 10 (driver 12).
  • the lever arm 18 of the lever 10 is double, i.e. the lever arm 18 has an essentially U-shaped shape (in FIG. 1 an upside-down "U").
  • the ends of the legs of the "U” are rotatably held at the pivot points 80 aligned with one another, while the base of the "U” forms the rod-shaped driver 12.
  • the legs of the U-shaped lever arm 18 are also curved in a C-shape, so that the point of engagement of the driver 12 with the stop 16 is offset relative to the pivot points 80 of the lever arm 18 in Fig. 1 to the right.
  • the storage surface 14 is arranged essentially transversely to the direction of flow in the blow-out duct.
  • the storage surface 14 can also be arranged outside the blow-out channel 6 in the vicinity of its opening into the environment. It is sufficient if the storage surface 14 can be subjected to a pressure surge in the blow-out duct 6.
  • Lever 10 set appropriately.
  • the rest position can also be achieved by a resilient element (not shown) be ensured.
  • This resilient element can be a helical spring as a tension or compression spring, a spring tongue on the housing or lever or just a simple molded tongue when the lever or the housing is injection molded.
  • the lever 10 can also be designed such that it rests against the stop 16 of the trigger shaft with a small force both in the rest position and in the triggered position.
  • FIG. 2 shows the switch of FIG. 1 in a partial side view. As in FIG. 1, the movable contact or the contact bridge is omitted in FIG. 2 for the sake of clarity.
  • the movable contact moves downward from the fixed contact 20 in FIG. 2 by electrodynamic repulsion.
  • the electrodynamic repulsion takes place through the magnetic fields around the contact carrier 22 (lower horizontal section) and the contact bridge (not shown) arranged parallel to the contact carrier 22 when the fixed contact 20 and the movable contact (not shown) on the contact bridge are closed.
  • a high current flows through the circuit breaker, current flows through two parallel conductors (contact holder and contact bridge) in the opposite direction. Magnetic fields of the same direction develop around the conductors and repel each other. If the current is high, the Magnetic fields so strong that they push the contacts apart 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 the separation produces a very rapid pressure rise (approx. 0.5 ms) of the air in the arcing chamber 4. This increase in pressure generates a pressure wave that propagates through the blow-out channel 6.
  • the blow-out duct 6 is connected to the surroundings in order to release the pressure into the surroundings in the form of the pressure wave.
  • the very fast pressure wave strikes the storage surface 14, which narrows the cross-section of the blow-out channel 6.
  • the storage area 14 gives way due to the resulting back pressure, i.e. due to the pressure difference on the front and rear of the storage area, towards the environmental end of the
  • 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 to the left in FIG. 2.
  • This will trip the circuit breaker, i.e. the movable contact (not shown) and the fixed contact 20 are further separated from one another and electrically separated by rotating the contact bridge through the switch-off device, such as a key switch, a ratchet mechanism or the like.
  • the switch-off device such as a key switch, a ratchet mechanism or the like.
  • Arc between the contacts breaks off and extinguishes in the quenching chamber 4.
  • the length ratios of the first lever arm 8 and the second lever arm 18 are selected such 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 significantly longer than the second lever arm 18. This allows a force to be applied to the trigger shaft 2 by the driver 12 reliably sufficient for triggering the circuit breaker.
  • the lever paths of the first and second lever arms are inversely related to the lever forces. The pressure wave propagates through the blow-out channel 6 with almost the same force, so that the accumulation surface 14 is always subjected to the differential pressure over the longer lever path of the first lever arm 8 and can accordingly generate the greater force on the second lever arm 18 without problems.
  • a lever 10 with a storage area 14 can be assigned to each blow-out channel of the switch. In particular in the case of multi-pole circuit breakers, this can be achieved with individual levers with a storage area in each case in one blow-out channel of each pole. Alternatively, a single lever can be connected to a plurality of storage areas, each of which is assigned to a blow-out channel. The individual storage areas can be connected to one another, for example, by means of suitable slot openings in the side faces of the blow-out ducts.
  • a simple solution is also the arrangement of a lever with several storage areas at the respective surrounding openings of the blow-out channels, i.e. simply a storage area at the end of each blow-out channel. This can simplify the design of the lever, the connection of the storage area and the design of the blow-out channels. If necessary, the storage areas as the
  • Flaps that close the outlet channels can be designed, which can prevent the penetration of foreign materials. Another embodiment of the invention will now be explained with reference to FIGS. 3 and 4. Elements having the same effect as in FIGS. 1 and 2 are denoted by the same reference symbols, so that these elements are not explained again.
  • This exemplary embodiment differs from the previous exemplary embodiment in particular in the arrangement of the storage surface and the lever arrangement for transmitting force to the trigger shaft as the trigger member, so that the deviations from the first exemplary embodiment are described here in the main.
  • FIG. 3 shows a side view of a portion of a circuit breaker in the non-tripped state
  • FIG. 4 shows the same view in the tripped state of the circuit breaker.
  • FIG. 3 shows an arcing chamber which is assigned to a contact pair (not shown).
  • the quenching chamber is connected to the surroundings via a blow-out duct 6.
  • a storage surface 14 is arranged in the blow-out duct 6 and is connected to a rotatable shaft 80.
  • a lever extension 18 arranged on the shaft 80 forms a second lever arm 18 of a lever 10, the first lever arm of which is formed by the storage surface 14.
  • the second lever arm 18 engages with a first rocker arm 108 of a rocker arm 100 via a hinge 110.
  • the rocker arm 100 is in one Pivot 800 is rotatably attached to the housing.
  • the hinge 110 is designed such that a rotation of the lever 10 clockwise around the shaft 80 causes a rotation of the rocker arm 100 in a counterclockwise direction around the pivot point 800. The same applies to the reversal of the directions of rotation.
  • the rocker arm 100 has on its second rocker arm 118 a driver 12 which can interact with an associated stop 16 of the tripping shaft 2 in order to trip the circuit breaker.
  • the engagement between the driver 12 and the stop 16 takes place analogously to the first exemplary embodiment, so that there is no repetition here.
  • the rocker arm 100 is rotated counterclockwise about the pivot point 800.
  • the second rocker arm 118 swivels to the left and the driver 12 rotates the trigger shaft 2 in the triggering direction via the stop 16 and triggers the switch-off device.
  • the end positions of the levers in the released state are shown in Fig. 4.
  • the hinge 110 and / or the engagement between the driver 12 and the stop 16 can be designed such that the two levers 10 and 100 remain in the tripping position when the circuit breaker has been triggered by the pressure wave. As a result, this triggering case can be made easily visible on the housing by means of appropriate labeling (color marking, viewing window or the like).
  • 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 used in the injection molding of lever 10 and
  • lever ratios are selected so that a sufficient triggering force is generated on the driver 12 of the rocker arm 100.
  • the embodiment shown in FIG. 3 or FIG. 4 is particularly suitable for multi-pole circuit breakers which have a plurality of blow-out channels in accordance with the number of poles.
  • the rotary shaft 80 can be used to connect a plurality of storage surfaces in or on the individual blow-out ducts by guiding the rotary shaft through bores in the side walls of the respective blow-out ducts. This results in a simple mounting of the rotary shaft and a relatively good sealing of the individual exhaust ducts from one another, so that an effective pressure wave can be maintained in each of the exhaust ducts.
  • By connecting all the storage areas with just one rocker arm, which can trigger a common disconnection of all poles of the circuit breaker a simple construction is possible with which the circuit breaker can be triggered very quickly if a short circuit occurs at only one pole.
  • the storage areas can be arranged at the ends of the blow-out channels and / or outside of them, as was explained above with reference to FIG. 1.

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 Dispositif de declenchement pour disjoncteur Expired - Lifetime EP1266387B1 (fr)

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 (fr) 2000-03-17 2001-03-16 Dispositif de declenchement pour disjoncteur

Publications (2)

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

Family

ID=7635151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01933716A Expired - Lifetime EP1266387B1 (fr) 2000-03-17 2001-03-16 Dispositif de declenchement pour disjoncteur

Country Status (6)

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

Families Citing this family (10)

* 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
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
DE102009015126A1 (de) 2009-03-31 2010-10-14 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
DE102011077359A1 (de) 2011-06-10 2012-12-13 Siemens Aktiengesellschaft Auslöser für eine elektrische Schaltanordnung
DE102012200662A1 (de) * 2012-01-18 2013-07-18 Siemens Aktiengesellschaft Schaltvorrichtung für ein elektrisches Schaltgerät
CN111226301B (zh) * 2017-10-20 2022-07-19 三菱电机株式会社 断路器
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.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0169630A1 *

Also Published As

Publication number Publication date
DE10013099A1 (de) 2001-10-04
DE50112908D1 (de) 2007-10-04
WO2001069630A1 (fr) 2001-09-20
EP1266387B1 (fr) 2007-08-22
PL357826A1 (en) 2004-07-26
ATE371258T1 (de) 2007-09-15
DE10013099B4 (de) 2004-08-26
PL198870B1 (pl) 2008-07-31
CN1230853C (zh) 2005-12-07
CN1418369A (zh) 2003-05-14

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