EP0360366B1 - Boîtier moulé pour un disjoncteur électrique de puissance basse tension avec renfort contre une surpression - Google Patents

Boîtier moulé pour un disjoncteur électrique de puissance basse tension avec renfort contre une surpression Download PDF

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Publication number
EP0360366B1
EP0360366B1 EP89250035A EP89250035A EP0360366B1 EP 0360366 B1 EP0360366 B1 EP 0360366B1 EP 89250035 A EP89250035 A EP 89250035A EP 89250035 A EP89250035 A EP 89250035A EP 0360366 B1 EP0360366 B1 EP 0360366B1
Authority
EP
European Patent Office
Prior art keywords
case
housing
circuit breaker
moulded
moulded case
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
EP89250035A
Other languages
German (de)
English (en)
Other versions
EP0360366A2 (fr
EP0360366A3 (fr
Inventor
Clifford A. Buxton
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0360366A2 publication Critical patent/EP0360366A2/fr
Publication of EP0360366A3 publication Critical patent/EP0360366A3/fr
Application granted granted Critical
Publication of EP0360366B1 publication Critical patent/EP0360366B1/fr
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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/025—Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts
    • H01H71/0257—Strength considerations
    • 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
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • H01H9/042—Explosion-proof cases

Definitions

  • the invention relates to an insulating molded-plastic housing of a low-voltage circuit breaker with two housing parts which are connected to one another along a part joint and with a wall part which is arranged transversely to the partial joint and serves to reinforce the molded-material housing with respect to an overpressure acting on the inside.
  • a molding material housing of this type has become known, for example, from DE-B-28 02 553.
  • MCCB Molded Case Circuit Breaker
  • ICCB Insulated Case Circuit Breaker
  • the housing according to the mentioned DE-B-28 02 553 is designed to avoid damage due to internal overpressure due to switching arcs in such a way that the outer walls of the upper part of the housing overlap the outer walls of the lower part. It is thereby achieved that the spreading forces exerted by the gas pressure on the outer walls of the lower part are partially transferred into the outer walls of the upper part. With the same pressure load, a smaller material thickness can therefore be selected for the outer walls of the lower part.
  • the wall part used for reinforcement is located in the upper part of the housing and is integrally formed on the side walls.
  • the object of the invention is to improve the support of the side walls of the two housing parts and to provide a housing structure which is particularly suitable for low-voltage circuit breakers for the higher range of nominal currents and switching powers.
  • the wall part is inserted between the housing parts and for this purpose has end webs with an undercut profile on opposite sides and that the housing parts each have a groove adapted to the undercut profile in the region of the parting joint, such that the grooves overlap the end webs of the wall part in a form-fitting manner.
  • the wall part is directly involved in absorbing the spreading forces in the area of the side walls of both housing parts.
  • the undercut design in the area of the parting joint also ensures that the side walls in the area of the parting joint cannot move against one another and thus no gas escapes at this point.
  • the grooves of the end faces of the housing parts can be arranged recessed in relation to the outer edge of the housing. This creates a labyrinth-like angled contact surface between the side walls and the reinforcing wall part. This creates a crawl path that is advantageous for electrical insulation and increases the resistance to the passage of switching gases.
  • the wall part as a partition for dividing the molding material housing.
  • the function of supporting the side walls of the molding material housing can advantageously be combined with an internal subdivision of the molding material housing into different functional spaces.
  • FIG. 1 shows a perspective view of the molded-material housing of a low-voltage circuit breaker.
  • FIG. 2 is a perspective view of a partition which also serves to reinforce the housing shown in FIG. 1.
  • FIG. 3 shows a reinforcing wall part in a front view.
  • FIG. 4 shows a section from the region of side walls of the molding material housing according to FIG. 1 with a reinforcing wall part inserted between them.
  • FIG. 5 is a top view of the two housing parts of a molding material housing with a partition wall inserted between them.
  • a molded plastic housing 10 according to FIG. 1 has housing parts 12 and 14. Both housing parts 12 and 14 are formed by a fastener, z. B. screws, which are arranged in openings 18 of the housing part 12. Only one of the openings 18 is visible in FIG. 1, while a further opening 18 is arranged on the opposite side of the housing 10. The threaded part of the screws, not shown, extends into suitable threaded openings in the housing part 14. In this way, the housing parts 12 and 14 are held together against forces which act in the direction of arrows A and B in FIG. 1.
  • the partition 22 has end webs 20.
  • the profile of the end webs 20 can be seen in FIG. 3.
  • a substantially dovetail-shaped section then adjoins a parallel-walled section.
  • FIG. 4 The interaction of the end webs 20 with the side walls 28 and 30 is shown in FIG. 4.
  • the side walls 28 and 30 are provided in the region of the parting line 16 with recesses 24 and 26, respectively, which are adapted to the shape of the end web 20 shown in FIG.
  • the side walls 28 and 30 overlap the end webs 20 in such a way that a positive connection is established and a mutual displacement of the side walls 28 and 30 at the parting line 16 is excluded.
  • This is indicated by the double arrow pointing in the directions F and G in the region of the side wall 28 and the double arrow pointing in the directions D and E in the region of the side wall 30.
  • the partition wall 22 with the end webs 20 acts as an additional stiffening of the side walls 28 and 30, since it can absorb tensile forces and therefore relieves the side walls of bending forces.
  • FIG. 5 The installation of the partition wall 22 in the housing 10 can be seen particularly clearly from FIG. 5, in which the molded-material housing 10 is shown cut away in a top view.
  • the molded plastic housing 10 and the partition 22 are provided with partitions for dividing the housing into three chambers for the three poles of a circuit breaker.
  • the partition 22 In the area of the side walls 28 and 30 engages the partition 22 with its end webs 20 in the recesses 24 and 26 on the parting line 16 between the housing parts 12 and 14.
  • the partition 22 is able to absorb tensile forces resulting from the internal overpressure on the side walls 28 and 30 that occurs during switching.
  • the end webs 20 have a dovetail-shaped profile.
  • other cross-sectional shapes are also suitable which, due to an undercut, have the same effect as a reinforcing part, e.g. B. a circular cross-section, hammer head cross-section or similar shapes.

Landscapes

  • Breakers (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Casings For Electric Apparatus (AREA)

Claims (4)

  1. Boîtier moulé (10) isolant d'un disjoncteur basse tension, comportant deux éléments de boîtier (12, 14) reliés en étant appliqués l'un contre l'autre le long d'un joint de séparation (16), ainsi qu'un élément de paroi (22), qui sert à renforcer le boîtier moulé (10) vis-à-vis d'une surpression agissant intérieurement et qui est disposé transversalement au joint de séparation (16), caractérisé par le fait que l'élément de paroi (22) est inséré entre les éléments de boîtier (12, 14) et comporte à cet effet, sur des côtés opposés, des barrettes d'extrémité (20) à profil en contre-dépouille, et que les éléments de boîtier (12, 14) ont, dans la zone du joint de séparation (16), chacun un évidement (24, 26) adapté au profil en contre-dépouille, de sorte que les évidements (24, 26) viennent selon une liaison par formes complémentaires sur les barrettes d'extrémité (20) de l'élément de paroi (22).
  2. Boîtier moulé suivant la revendication 1, caractérisé par le fait que les évidements (24, 26) des surfaces d'extrémité des éléments de boîtier (12, 14) sont disposés en retrait par rapport au bord extérieur du boîtier (10).
  3. Boîtier moulé suivant la revendication 1, caractérisé par le fait que l'élément de paroi est réalisé sous la forme d'une paroi de séparation (22) servant à subdiviser le boîtier moulé (10).
  4. Boîtier moulé suivant la revendication 1, caractérisé par le fait que le profil des barrettes d'extrémité (20) est en forme de queue d'aronde.
EP89250035A 1988-09-19 1989-09-13 Boîtier moulé pour un disjoncteur électrique de puissance basse tension avec renfort contre une surpression Expired - Lifetime EP0360366B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/246,470 US4899253A (en) 1988-09-19 1988-09-19 Molded case circuit breaker housing reinforcement
US246470 1988-09-19

Publications (3)

Publication Number Publication Date
EP0360366A2 EP0360366A2 (fr) 1990-03-28
EP0360366A3 EP0360366A3 (fr) 1991-11-06
EP0360366B1 true EP0360366B1 (fr) 1994-11-30

Family

ID=22930815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89250035A Expired - Lifetime EP0360366B1 (fr) 1988-09-19 1989-09-13 Boîtier moulé pour un disjoncteur électrique de puissance basse tension avec renfort contre une surpression

Country Status (6)

Country Link
US (1) US4899253A (fr)
EP (1) EP0360366B1 (fr)
JP (1) JPH02197022A (fr)
CA (1) CA1331775C (fr)
DE (1) DE58908683D1 (fr)
ES (1) ES2064429T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD339565S (en) 1991-06-13 1993-09-21 Wila Leuchten Gmbh Recessed lighting power system module
US5189596A (en) * 1991-12-20 1993-02-23 Westinghouse Electric Corp. Transition for electrical apparatus
US6005207A (en) * 1997-09-23 1999-12-21 Siemens Energy & Automation, Inc. Multi-part circuit breaker housing
US8944070B2 (en) * 1999-04-07 2015-02-03 Intuitive Surgical Operations, Inc. Non-force reflecting method for providing tool force information to a user of a telesurgical system
DE19958945A1 (de) 1999-11-26 2001-05-31 Siemens Ag Elektrisches Schaltgerät mit mehreren Gehäuseteilen
DE10323094B3 (de) * 2003-05-16 2004-08-12 Siemens Ag Leistungsschalter
US20230377822A1 (en) * 2022-05-20 2023-11-23 Rockwell Automation Technologies, Inc. Circuit breaker housing with two-stage structure

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422235A (en) * 1966-01-28 1969-01-14 Heinemann Electric Co Arcing grid case support means
US3329793A (en) * 1966-01-28 1967-07-04 Heinemann Electric Co Circuit breaker case
FR2309032A1 (fr) * 1975-04-21 1976-11-19 Mang Ets Gerard Appareils d'interruption de circuits electriques
DE2802553B1 (de) * 1978-01-19 1979-01-18 Siemens Ag Niederspannungs-Leistungsschalter mit geteiltem Isolierstoffgehaeuse
JPS5663735A (en) * 1979-10-27 1981-05-30 Fuji Electric Co Ltd Circuit breaker
US4389555A (en) * 1982-04-05 1983-06-21 Heinemann Electric Company Circuit breaker with increased electrical spacing
US4598186A (en) * 1983-05-09 1986-07-01 Square D Company Vent arrangement for high amperage molded case circuit breaker
US4524339A (en) * 1983-05-09 1985-06-18 Square D Company Contact control arrangement for high amperage molded case circuit breaker

Also Published As

Publication number Publication date
US4899253A (en) 1990-02-06
EP0360366A2 (fr) 1990-03-28
CA1331775C (fr) 1994-08-30
DE58908683D1 (de) 1995-01-12
EP0360366A3 (fr) 1991-11-06
JPH02197022A (ja) 1990-08-03
ES2064429T3 (es) 1995-02-01

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