EP0003973B1 - Niederspannungs-Leitungsschalter mit einem elektromagnetischen Auslöser - Google Patents

Niederspannungs-Leitungsschalter mit einem elektromagnetischen Auslöser Download PDF

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Publication number
EP0003973B1
EP0003973B1 EP79100414A EP79100414A EP0003973B1 EP 0003973 B1 EP0003973 B1 EP 0003973B1 EP 79100414 A EP79100414 A EP 79100414A EP 79100414 A EP79100414 A EP 79100414A EP 0003973 B1 EP0003973 B1 EP 0003973B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
bearing
housing
low
armature
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
EP79100414A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0003973A1 (de
Inventor
Werner Troebel
Erwin Klatt
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 EP0003973A1 publication Critical patent/EP0003973A1/de
Application granted granted Critical
Publication of EP0003973B1 publication Critical patent/EP0003973B1/de
Expired 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0214—Housing or casing lateral walls containing guiding grooves or special mounting facilities
    • 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
    • H01H71/2472—Electromagnetic mechanisms with rotatable armatures

Definitions

  • the invention relates to a low-voltage circuit breaker with an insulating housing divided along a joint into an upper part and a lower part and an electromagnetic release arranged therein, which has an armature movably mounted with laterally projecting bearing pins in the housing and a U likewise fastened in the housing -shaped magnetic yoke.
  • a switch of this type has become known from DE-OS 2 023 797.
  • a fastening bracket is formed on the magnetic yoke, through which a fastening screw inserted into the lower housing part extends.
  • An angled part of a current-carrying bimetal strip also lies on the mounting bracket, so that the magnetic yoke and the bimetal strip are fastened together to the housing by the same screw. Details of the mounting of the magnet armature assigned to the magnet yoke cannot be found in the aforementioned publication.
  • the invention has for its object to design the mounting or mounting of the two interacting parts of the electromagnetic release so that the desired accuracy in the interaction of the magnet yoke and the armature results with simple assembly.
  • a frame made of sheet metal for common mounting or storage of the magnetic yoke and the armature, as he z. B. has become known by US-PS 3 125651, but should be avoided.
  • this object is achieved in that the bearing pins of the armature engage in pocket-like bearing openings of the lower part of the housing, which are open towards the parting joint and are limited by counterparts of the upper part in the operational state of the circuit breaker, and in that the magnetic yoke between U-shaped wall surfaces of the lower part and an island-like projection standing at a distance from the wall surfaces is received and is applied to this by a spring element inserted between the central leg of the magnetic yoke and the associated wall surface.
  • the relative position of the two interacting parts of the electromagnetic release is thus obtained without any adjustment process simply by inserting the parts into the lower part of the switch housing.
  • the effort for the production of the bearing and fastening points is also low because they are integral with the lower housing part and are therefore formed in one work step during its production.
  • the bearing pins of the armature can have a rectangular cross section, while the pocket-like bearing openings are delimited by surfaces that are at an angle to one another. The angle between these surfaces is appropriately adapted to the intended or required pivot angle of the armature.
  • a blade-like mounting with advantageously low frictional resistance can be achieved in that the bearing surface of the bearing journal of the armature is composed of two partial surfaces which are at an angle to one another.
  • the magnetic yoke of the electromagnetic release is placed against the island-like projection by the spring element mentioned and thereby secured against displacement.
  • a conductor arranged in the vicinity of the magnetic yoke can additionally be provided with a projection which engages over the magnetic yoke and thereby holds it in place.
  • Fig. 1 shows a low-voltage circuit breaker in a longitudinal section.
  • FIG. 2 shows a section of the side wall of a lower housing part of the circuit breaker shown in FIG. 1.
  • 3 and 4 show an associated section of the upper housing part in two different views.
  • a magnetic yoke is shown in a top view in FIG. 5.
  • the associated anchor is shown in FIG. 6.
  • Fig. 7 shows a part of the lower part of a switch housing.
  • the circuit breaker 1 shown in Fig. 1 has an insulating housing 2, the z. B. can be made of a molded material.
  • the housing 2 is divided along a parting line 3 into an upper part 4 and a lower part 5.
  • the current path of the circuit breaker 1 runs from a connection device 6 via a fixed switching element 7 and a movable switching element 10 and via a flexible conductor 11 and a heating conductor 12 to a further connection device 13.
  • the movable contact piece 10 is articulated to a contact piece carrier 14, which is connected by a switching shaft 15 to the contact piece carriers of the adjacent poles of the circuit breaker 1, which are not visible in FIG. 1.
  • One lever 17 of a toggle lever system acts on the hinge pin 16 and can be moved in a known and therefore not shown manner by an actuating handle 20 protruding from an opening in the upper part 4.
  • the movable contact piece 10 can be moved into the switch-off position in addition to the actuating handle 20 and also by a thermal release 21 and an electromagnetic release 22.
  • the two triggers mentioned together influence the angular position a trigger shaft 23, which in turn interacts with a locking tab 24.
  • a pawl 25 of the switch lock of the circuit breaker 1 can be locked by this locking tab.
  • the magnetic trigger 22 comprises a fixed magnetic yoke 26 and a pivotably mounted armature 27 (FIG. 6).
  • a tension spring 29 holds the armature 27 in the rest position shown.
  • the heating conductor 12 runs between the legs 30 and 31 of the magnetic yoke 26 (FIG. 5).
  • the magnetic yoke is therefore excited by the current which flows via the current path of the circuit breaker 1. Is this current z. B. sufficiently large in the event of a short circuit, the armature 27 is pulled against the force of the return spring 29 against the oblique pole faces 32 and 33 of the magnetic yoke 26 and thereby pivoted in such a way that the trigger shaft 23 is rotated clockwise and the locking tab 24 about its pivot bearing 34 is pivoted counterclockwise. The movable contact piece 10 is then transferred to its off position under the influence of stored spring forces.
  • the bearing opening of armature 27, designated 35 in FIG. 1, is shown enlarged in FIG. 2. It can be seen that the bearing opening 35 is designed as a pocket-like recess in a side wall or partition wall 36 of the lower part 5 of the housing 2 and is open upwards towards the parting line 3.
  • the side of the bearing opening is delimited by surfaces 37 and 40 which are at an angle to one another and which allow the armature 27 to be pivoted by a desired or required angle.
  • the bearing pin 41 of the armature 27 shown in dashed lines in FIG. 2 lies with its lower narrow surface 42 approximately half on a partial surface 43, which is angularly adjoined by a further, approximately equally long partial surface 44.
  • the partial surfaces 34 and 44 which meet at 45 therefore form an approximately cutting-like contact surface for the bearing journal 41.
  • a continuous surface can also be provided. Then the rotational movement is carried out on an edge of the journal 41.
  • the bearing opening 35 widens upward to a rectangular recess 50, which is provided for receiving a counterpart attached to the upper part 4 of the housing 2.
  • FIG. 3 shows a section of the side wall 52 of the upper part 4 of the housing 2 with a view of the parting line 3.
  • the counterpart 51 forms a projection from the lower part 53 of the stepped side wall 52, so that a space 54 remains to the outer higher part 55 of the side wall 52.
  • FIG. 4 in which the side wall 52 is shown in section.
  • Similar bearing openings 35 are each arranged in the walls of the lower part 5 of the housing 2 delimiting a pole track of the circuit breaker 1 (FIG. 7).
  • the anchors assigned to each pole track are therefore each mounted in the bearing openings 35 with two bearing pins 41 defining a bearing axis.
  • an inset-like projection 60 is provided in each pole track of the circuit breaker 1.
  • FIG. 7 which shows a plan view of the part of the lower part 5 of the housing 2 shown on the left in FIG. 1, the projections 60 are arranged at a distance from wall surfaces 61, 82 and 63 arranged in a U-shape .
  • This U-shaped space is adapted to the shape of the magnetic yoke 26 (FIG. 5) such that the central part 28 of the magnetic yoke 26 can be received between the projection 60 and the central wall surface t32.
  • the dimensioning of the parts creates an intermediate space for inserting a spring element 64, which engages the magnetic yoke 26 with its central part 28 against the projection 60.
  • the magnetic yoke 26 is also held by a projection 65 of a conductor 66 which establishes the connection of the connection device 13 with the heating conductor 12.
  • the magnet yoke 26 is thus held without screws, rivets or similar parts only by positive and non-positive engagement.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Electromagnets (AREA)
EP79100414A 1978-03-10 1979-02-12 Niederspannungs-Leitungsschalter mit einem elektromagnetischen Auslöser Expired EP0003973B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2810987A DE2810987C3 (de) 1978-03-10 1978-03-10 Niederspannungsschutzschalter mit einem elektromagnetischen Auslöser
DE2810987 1978-03-10

Publications (2)

Publication Number Publication Date
EP0003973A1 EP0003973A1 (de) 1979-09-19
EP0003973B1 true EP0003973B1 (de) 1981-06-10

Family

ID=6034386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79100414A Expired EP0003973B1 (de) 1978-03-10 1979-02-12 Niederspannungs-Leitungsschalter mit einem elektromagnetischen Auslöser

Country Status (4)

Country Link
US (1) US4260969A (enrdf_load_stackoverflow)
EP (1) EP0003973B1 (enrdf_load_stackoverflow)
JP (1) JPS54126974A (enrdf_load_stackoverflow)
DE (1) DE2810987C3 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4680564A (en) * 1984-10-01 1987-07-14 Siemens-Allis, Inc. Multi-pole molded case circuit breaker with a common contact operating crossbar member
US4862131A (en) * 1988-10-11 1989-08-29 Square D Company Trip crossbar translation to prevent bimetal overstressing in a circuit breaker
US5237297A (en) * 1992-07-06 1993-08-17 American Circuit Breaker Corporation Tripping apparatus for use with an electrical circuit breaker having magnetic tripping responsive to low overcurrent

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125651A (en) * 1964-03-17 brumfield
US3178535A (en) * 1957-04-12 1965-04-13 Westinghouse Electric Corp Automatic circuit breaker with improved bimetallic and electromagnetic trip device
US3548358A (en) * 1969-05-19 1970-12-15 Gen Electric Electric circuit breaker with bimetallic strip protective means
GB1393799A (en) * 1971-12-01 1975-05-14 Tokyo Shibaura Electric Co Circuit breaker
US3796980A (en) * 1972-07-31 1974-03-12 Westinghouse Electric Corp Disposable circuit breaker
US3743981A (en) * 1972-09-13 1973-07-03 Ceb Ltd Circuit breaker
CH577748A5 (enrdf_load_stackoverflow) * 1973-07-31 1976-07-15 Ellenberger & Poensgen
DE2344872C2 (de) * 1973-09-06 1975-10-30 Brown, Boveri & Cie Ag, 6800 Mannheim Leitungsschutzschalter
US3909764A (en) * 1974-06-05 1975-09-30 Caribe Circuit Breaker Co Inc Electric circuit breaker
US3987382A (en) * 1975-07-22 1976-10-19 I-T-E Imperial Corporation Unitized motor starter
US4088973A (en) * 1976-04-28 1978-05-09 Gould Inc. Unitized combination starter

Also Published As

Publication number Publication date
JPS54126974A (en) 1979-10-02
DE2810987C3 (de) 1985-01-03
US4260969A (en) 1981-04-07
DE2810987B2 (de) 1980-04-17
EP0003973A1 (de) 1979-09-19
DE2810987A1 (de) 1979-09-13
JPS6120100B2 (enrdf_load_stackoverflow) 1986-05-20

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