EP0360366A2 - 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

Info

Publication number: EP0360366A2
Authority: EP; European Patent Office
Prior art keywords: housing; housing parts; circuit breaker; molding material; partition
Prior art date: 1988-09-19
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

EP89250035A

Other languages

German (de)

English (en)

Other versions

EP0360366B1 (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.)

1988-09-19

Filing date

1989-09-13

Publication date

1990-03-28

1989-09-13 Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG

1990-03-28 Publication of EP0360366A2 publication Critical patent/EP0360366A2/fr

1991-11-06 Publication of EP0360366A3 publication Critical patent/EP0360366A3/fr

1994-11-30 Application granted granted Critical

1994-11-30 Publication of EP0360366B1 publication Critical patent/EP0360366B1/fr

2009-09-13 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

Images

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 against 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 in the region of the joint each have a groove adapted to the undercut profile, 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 expansion 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 there is no gas escape at this point.
the grooves of the end faces of the housing parts can be arranged set back from 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.
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 of 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 wall 22 has end webs 20.
the profile of the end webs 20 can be seen in FIG. 3. Thereafter, an essentially dovetail-shaped section 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 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 wall 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 which 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)

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 true EP0360366A2 (fr)	1990-03-28
EP0360366A3 EP0360366A3 (fr)	1991-11-06
EP0360366B1 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

1988
- 1988-09-19 US US07/246,470 patent/US4899253A/en not_active Expired - Lifetime
1989
- 1989-09-13 ES ES89250035T patent/ES2064429T3/es not_active Expired - Lifetime
- 1989-09-13 DE DE58908683T patent/DE58908683D1/de not_active Expired - Fee Related
- 1989-09-13 JP JP1239744A patent/JPH02197022A/ja active Pending
- 1989-09-13 EP EP89250035A patent/EP0360366B1/fr not_active Expired - Lifetime
- 1989-09-15 CA CA000611594A patent/CA1331775C/fr not_active Expired - Fee Related

Also Published As

Publication number	Publication date
US4899253A (en)	1990-02-06
EP0360366B1 (fr)	1994-11-30
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

Legal Events

Date	Code	Title	Description
1990-02-10	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1990-03-28	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): DE ES FR GB IT
1991-02-27	17P	Request for examination filed	Effective date: 19901220
1991-09-18	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1991-11-06	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): DE ES FR GB IT
1994-03-23	17Q	First examination report despatched	Effective date: 19940203
1994-10-14	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1994-11-30	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE ES FR GB IT
1995-01-12	REF	Corresponds to:	Ref document number: 58908683 Country of ref document: DE Date of ref document: 19950112
1995-02-01	REG	Reference to a national code	Ref country code: ES Ref legal event code: FG2A Ref document number: 2064429 Country of ref document: ES Kind code of ref document: T3
1995-02-24	ITF	It: translation for a ep patent filed
1995-03-03	ET	Fr: translation filed
1995-03-15	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)	Effective date: 19950210
1995-09-30	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1995-11-22	26N	No opposition filed
2002-01-01	REG	Reference to a national code	Ref country code: GB Ref legal event code: IF02
2003-09-04	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 20030904 Year of fee payment: 15
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2005-05-04	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 20040913
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