EP0006637B1 - Mehrpoliger strombegrenzender Selbstschalter - Google Patents

Mehrpoliger strombegrenzender Selbstschalter Download PDF

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Publication number
EP0006637B1
EP0006637B1 EP79102226A EP79102226A EP0006637B1 EP 0006637 B1 EP0006637 B1 EP 0006637B1 EP 79102226 A EP79102226 A EP 79102226A EP 79102226 A EP79102226 A EP 79102226A EP 0006637 B1 EP0006637 B1 EP 0006637B1
Authority
EP
European Patent Office
Prior art keywords
contactors
poles
movable
spring
holders
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
Application number
EP79102226A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0006637A1 (de
Inventor
Kiyoshi Dipl.-Ing. Kandatsu
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to AT79102226T priority Critical patent/ATE309T1/de
Publication of EP0006637A1 publication Critical patent/EP0006637A1/de
Application granted granted Critical
Publication of EP0006637B1 publication Critical patent/EP0006637B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • H01H77/10—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 electrodynamic opening
    • H01H77/101—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 electrodynamic opening with increasing of contact pressure by electrodynamic forces before opening
    • 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
    • H01H71/1009—Interconnected 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee

Definitions

  • the invention relates to a multi-pole current-limiting self-switch with a contact system that can be opened by current forces and to a rotatably mounted switching shaft made of insulating material, fasteners for the movable contact parts, one of which is connected to the opening system.
  • the movable and fixed contact part are arranged parallel to one another in such a way that the current flow in one of them flows in the opposite direction to the other.
  • this causes electromagnetic repulsive forces with respect to the contact parts, so that they are separated, earlier than the usual disconnection movement when the overcurrent is triggered.
  • the latching per pole is released when the electromagnetic force occurs and held in the open position by friction. Subsequently, the subsequent usual separation via the selector shaft completes the opening of the switch.
  • the number of equipment must correspond to the number of poles. This results in a much larger design and higher costs of the switch compared to a switch without a quick-switching device. There are also disadvantages when three-phase shorts occur.
  • the invention is therefore based on the object to provide a compact and travel-worthy multi-pole current-limiting circuit breaker of the type mentioned above, which opens practically simultaneously without additional magnetic unlocking of all contact members, depending on the totality of all magnetic forces which act on all contact members.
  • This object is achieved in a simple manner in the case of a self-switch of the type mentioned above in that the one holder is provided with a pivotably mounted, spring-loaded tab and has a guide link for a bolt which can be blocked by the tab via the spring load and is connected to the opening system, the blocking thereof can be removed in accordance with the spring load at a predeterminable electromagnetic counterforce caused by the sum of the currents, all movable contact parts being pushed into the open position via the brackets and the selector shaft.
  • An arrangement has proven to be particularly effective if the resultant of the current forces is directed in the direction of the bearing point of the tab.
  • the determination of the forces at which the contact systems are separated can be carried out relatively precisely if the blocking between the plate and the pin takes place via a roller which is connected to an adapted end part of the plate.
  • the movable contact part 4 denotes a U-shaped fixed contact part with a contact pad 2 and an arcing horn 3.
  • the movable contact part 4 also has a contact pad 5.
  • the movable contact part 4 is held by means of rivets or in a similar manner on a carrier 9 which is rotatable about an axis 7 a holder 6 is mounted. It is continuously spring-loaded by the spring 8 in the counterclockwise direction.
  • the handle 10 is rotatable with the lever 11 about an axis, not shown.
  • a web 12 on the lever 11 serves to hold one end of the switching spring 13.
  • a tab 14 is rotatably mounted on the bolt 15 and is provided with an end part 14a, which serves to receive the connecting means of an overcurrent release device, not shown.
  • toggle lever 16 is rotatably mounted on the bolt 17, which is fastened to the bracket 14, and the toggle lever 18 is provided with a bolt 20 which engages with a slot 19 in the holder 6.
  • the toggle levers 16 and 18 are articulated via the toggle lever pin 21, which also holds the other end of the switching spring 13.
  • another tab is designated, which is rotatably mounted about the axis 7 and which has an end portion 22a, which is equipped so that it can at least partially include a roller 23.
  • the roller 23 is coaxial with the pin 20 and has a larger diameter than the width of the slot 19.
  • the tab 22 is spring-loaded in the counterclockwise direction by a spring 24 to prevent the pin 20 from sliding off the inclined surface 19a of the slot 19 (see Fig. 6).
  • the holders 6 and 6 ' are mounted on the insulating shaft 25, for which purpose mounting brackets 26 are used.
  • the insulating shaft carries all the poles and is equipped with rotary lugs 25a at both ends, as can be seen from FIG. 6.
  • 27 is a Isolierzwi rule position which is introduced between the fixed contact part 1 and the movable contact part 4.
  • K is a constant which depends on the shape of the contact element
  • L is the length of the conductor in mm
  • S is the distance in mm between the fixed contact part 1 and the movable contact part 4.
  • the arrangement of the bearing points, the length of the conductors and the distance between the contact parts are dimensioned such that the resultant of the electromagnetic forces F b and F e causes a rotation of the movable contact part 4 about the axis 7 in the counterclockwise direction, ie in the Direction in which the contact pressure between the contact pads 2 and 5 is increased.
  • the resultant of the electromagnetic forces F b and F e acts on the axis 7 in order to pivot the holder 6 clockwise around the axis line of the insulating shaft 25 or of the rotary lugs 25a.
  • the amount of current at which the arc current reduction mechanism described above begins to act to disengage the end portion 22a may advantageously be determined depending on the strength of the spring 24 and the angle ⁇ of the sloping surface 19a of the slot 19.
  • a compact, inexpensive and highly effective switch can be obtained in which the number of the arc current reducing means has been reduced.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Electromagnets (AREA)
EP79102226A 1978-07-05 1979-07-02 Mehrpoliger strombegrenzender Selbstschalter Expired EP0006637B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79102226T ATE309T1 (de) 1978-07-05 1979-07-02 Mehrpoliger strombegrenzender selbstschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP53081599A JPS5942935B2 (ja) 1978-07-05 1978-07-05 回路しゃ断器
JP81599/78 1978-07-05

Publications (2)

Publication Number Publication Date
EP0006637A1 EP0006637A1 (de) 1980-01-09
EP0006637B1 true EP0006637B1 (de) 1981-10-14

Family

ID=13750774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79102226A Expired EP0006637B1 (de) 1978-07-05 1979-07-02 Mehrpoliger strombegrenzender Selbstschalter

Country Status (6)

Country Link
US (1) US4278958A (enrdf_load_stackoverflow)
EP (1) EP0006637B1 (enrdf_load_stackoverflow)
JP (1) JPS5942935B2 (enrdf_load_stackoverflow)
AT (1) ATE309T1 (enrdf_load_stackoverflow)
DE (1) DE2926166A1 (enrdf_load_stackoverflow)
PH (1) PH16637A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7102471B2 (en) 2002-06-27 2006-09-05 Siemens Aktiengesellschaft Electrical power breaker with a switching contact arrangement having a current loop

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122245U (enrdf_load_stackoverflow) * 1980-02-19 1981-09-17
FR2506066A1 (fr) * 1981-05-18 1982-11-19 Merlin Gerin Mecanisme de manoeuvre d'un disjoncteur electrique multipolaire a basse tension
SE449338B (sv) * 1981-08-13 1987-04-27 Tetra Pak Int Oppningsanordning for forpackningsbehallare
DE3133285C2 (de) * 1981-08-22 1984-05-30 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Selbstschalter
US4470027A (en) * 1982-07-16 1984-09-04 Eaton Corporation Molded case circuit breaker with improved high fault current interruption capability
US4467301A (en) * 1982-08-27 1984-08-21 Essex Group, Inc. Electric switch having enhanced fault current capability
US4488133A (en) * 1983-03-28 1984-12-11 Siemens-Allis, Inc. Contact assembly including spring loaded cam follower overcenter means
JPS60123942U (ja) * 1984-01-30 1985-08-21 富士電機株式会社 回路しや断器
US4849590A (en) * 1988-04-01 1989-07-18 Kohler Company Electric switch with counteracting electro-electro-dynamic forces
US5021819A (en) * 1990-08-06 1991-06-04 General Electric Company Circuit breaker with positive over-center acceleration
US5266760A (en) * 1992-08-06 1993-11-30 Eaton Corporation Molded case circuit breaker
US5430420A (en) * 1994-01-24 1995-07-04 Eaton Corporation Contact arrangement for a circuit breaker using magnetic attraction for high current trip
DE19738807A1 (de) * 1997-09-05 1999-03-11 Kloeckner Moeller Gmbh Mehrpoliges strombegrenzendes Kontaktsystem für Niederspannungschalter
US6034581A (en) * 1998-06-30 2000-03-07 Siemens Energy & Automation, Inc. Remote controlled circuit breaker
DE10058419C1 (de) * 2000-11-24 2002-06-06 Moeller Gmbh Leistungsschutzschalter
ITMI20042234A1 (it) * 2004-11-19 2005-02-19 Abb Service Srl Interuttore automatico con cinematismo di sgancio azionato da contatto mobile
JP2007314946A (ja) * 2006-05-23 2007-12-06 Sekisui Yane System Kk 屋根の重ね葺き方法及びそれに用いる水切り部材
KR100798340B1 (ko) 2006-12-29 2008-01-28 엘에스산전 주식회사 한류기능을 구비한 배선용 차단기
KR101079020B1 (ko) * 2010-01-18 2011-11-01 엘에스산전 주식회사 배선용 차단기의 샤프트 유닛
KR101698814B1 (ko) * 2015-05-13 2017-01-24 현대중공업 주식회사 차단기

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182157A (en) * 1961-05-09 1965-05-04 Ite Circuit Breaker Ltd Over-center cam and anti-rebound means
DE1286185B (de) * 1963-02-18 1969-01-02 Licentia Gmbh Strombegrenzender Selbstschalter
US3500266A (en) * 1968-08-01 1970-03-10 Federal Pacific Electric Co High-speed circuit breakers
US3562680A (en) * 1969-09-17 1971-02-09 Fuji Electric Co Ltd Circuit breaker
US4144513A (en) * 1977-08-18 1979-03-13 Gould Inc. Anti-rebound latch for current limiting switches
US4146855A (en) * 1977-09-06 1979-03-27 Square D Company Low profile multi-pole circuit breaker having multiple toggle springs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7102471B2 (en) 2002-06-27 2006-09-05 Siemens Aktiengesellschaft Electrical power breaker with a switching contact arrangement having a current loop

Also Published As

Publication number Publication date
EP0006637A1 (de) 1980-01-09
PH16637A (en) 1983-12-05
DE2926166C2 (enrdf_load_stackoverflow) 1988-06-01
JPS5942935B2 (ja) 1984-10-18
ATE309T1 (de) 1981-10-15
JPS559346A (en) 1980-01-23
DE2926166A1 (de) 1980-01-17
US4278958A (en) 1981-07-14

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