EP0217458A2 - Löschkammer für Leistungsschalter mit Löschflüssigkeit, insbesondere für öl- oder flüssiggasarme Leistungsschalter - Google Patents

Löschkammer für Leistungsschalter mit Löschflüssigkeit, insbesondere für öl- oder flüssiggasarme Leistungsschalter Download PDF

Info

Publication number
EP0217458A2
EP0217458A2 EP86201620A EP86201620A EP0217458A2 EP 0217458 A2 EP0217458 A2 EP 0217458A2 EP 86201620 A EP86201620 A EP 86201620A EP 86201620 A EP86201620 A EP 86201620A EP 0217458 A2 EP0217458 A2 EP 0217458A2
Authority
EP
European Patent Office
Prior art keywords
arc
elements
quenching chamber
circuit breakers
quenching
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.)
Withdrawn
Application number
EP86201620A
Other languages
English (en)
French (fr)
Other versions
EP0217458A3 (de
Inventor
Gianpietro Talpo
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.)
ABB SACE SpA
Original Assignee
SACE SpA
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 SACE SpA filed Critical SACE SpA
Publication of EP0217458A2 publication Critical patent/EP0217458A2/de
Publication of EP0217458A3 publication Critical patent/EP0217458A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • H01H33/75—Liquid-break switches, e.g. oil-break

Definitions

  • the present invention relates to an arc-quenching chamber for circuit breakers with fluid arc-quenching medium, in particular for reduced oil volume or for liquified gas circuit breakers.
  • arc-quenching chambers realized by the union of a number of flat components (discs), constituted by superimposed layers of bakelized paper, and linked to each other by glueing or by fastening by insulating screws.
  • Such a type of arc-quenching chambers require a complex machining of each individual element of bakelized paper and in general a lengthy and expensive process for their accomplishment.
  • arc-quenching chambers made from thermoplastic material, which however require, due to constructive reasons, severe geometrical simplifica­tions both in the area of the cavities of the same cham­ber and in the area of the discharges, thus reducing the interruption performances obtainable from the system.
  • the interruption is accomplished with a less efficient control of the elec­trical arc, thus resulting fatiguing and with decidedly long times.
  • Purpose of the present invention is to provide an arc-extinguishing chamber of thermoplastic material which, besides obviating the constructive technological disadvantages as mentioned, allows the necessary "laby­rinth" arrangement of the various portions of the same chamber to be kept unchanged, as if said chamber were accomplished by assembling superimposed discs, further­more allowing the performances which can be obtained by a traditional chamber constituted by superimposed discs to be improved, and at the same time the construction there­of to be made simpler.
  • an arc-extinguishing chamber for circuit breakers with fluid arc-extinguishing medium has been accomplished, characterized in that it is constituted by two shaped elements of thermoplastic material, the one of the said two elements being coaxially insertable inside the other one, the said one of said two elements being provided in an upper inner portion thereof with a seat for housing stationary electrical contact means, and in correspondence thereof, on its outer surface, with means for distributing along the cylinder the stresses due to the inner pressure generated by the electrical arc, and for the escape to the outside of the gases generated by the electrical arc, it being furthermore provided in a lower portion thereof with disc-shaped portions and with a semicylindrical wall, said disc-shaped portions being suitable to define a first zone of said arc-quenching chamber provided with vent openings, and said wall being suitable to define a second closed zone of said arc-­quenching chamber when the one of the said two elements results operatively inserted inside the other one of the said two elements
  • alto­gether is an arc-quenching chamber, composed by two shaped elements 11 and 12 of thermoplastic material, the element 12 being suitable to be coaxially inserted inside the element 11 by means of guides 13 sliding inside special seats 14 which determine in an univocal way the insertion of elements 11 and 12.
  • the element 11 substantially of hollow cylindrical shape, is provided with an outer smooth wall 15 and is divided into two inner zones, a lower zone 16 and an upper zone 17 provided with an opening 40 on the wall 15.
  • the upper zone 17 contributes, together with a lower portion 18 of element 12, to form the true arc-quenching chamber, by means of complementary profiles provided inside the element 11, as well as on said lower portion 18 of element 12.
  • an upper portion 19 of element 12 is provided with projections 20 located on its outer sur­face, and suitable to distribute the force generated by the pressure of the arc, so to increase the mechanical strength of the said chamber and at the same time to allow the combustion gases which are formed to be vented to the outside, according to paths generally indicated by arrows 21.
  • a variably shaped lower portion 18 of element 12 comprises, besides the guides 13, four discs 23, 24, 25 and 26, positioned parallelly to one another and sepa­rated from the upper portion 19 and from each other by hollow portions 27.
  • the discs 23, 24, and 25 are respectively provided with projections 28, 29 and 30 of different sizes, lo­cated in homologous positions on each disc and suitable to engage inside a special guide 32 provided on element 11.
  • a position opposite to projection 30 of disc 25 provided is a substantially semicylindrical wall 31 ex­tending downward under disc 26.
  • the disc 26 and the wall 31 get housed inside a shaped seat 33 provided inside ele­ment 11, so to form a portion of arc-quenching chamber closed by containment walls, whilst the three upper discs 23, 24 and 25 come to lie in correspondence of the open­ing 40 provided on the wall 15, so to form a portion of arc-quenching chamber provided with openings for gas vent to the outside.
  • the two elements 11 and 12 shall be united to each other by a suitable resin or bonding agent, and inside the inner cavity 34 of the upper portion 19 of the element 12, a stationary contact (not shown) shall be housed; and inside the zones 16 and 17 of element 11 a movable contact (it too not shown) shall slide.
  • an arc-extinguishing chamber contained inside an unipolar housing filled with an arc-quenching medium, e.g., oil.
  • an arc-quenching medium e.g., oil.
  • thermo­plastic material - used to accomplish the arc-extinguish­ing chamber according to the present invention - is moulded, allow an improved efficacy to be obtained, both relatively to that of the normal arc-quenching chambers realized by means of stacks of discs of bakelized paper, and relatively to the arc-extinguishing chambers realized until today as monolithic pieces, which require extensive geometrical simplifications to be introduced in cavities and walls, due to moulding requirements.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
EP86201620A 1985-09-23 1986-09-19 Löschkammer für Leistungsschalter mit Löschflüssigkeit, insbesondere für öl- oder flüssiggasarme Leistungsschalter Withdrawn EP0217458A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2319085U 1985-09-23
IT2319085U IT206249Z2 (it) 1985-09-23 1985-09-23 Camera di estinzione d'arco per interruttori a fluido in particolare per interruttori a volume d'olio ridotto od a gasliquefatto.

Publications (2)

Publication Number Publication Date
EP0217458A2 true EP0217458A2 (de) 1987-04-08
EP0217458A3 EP0217458A3 (de) 1989-05-31

Family

ID=11204710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86201620A Withdrawn EP0217458A3 (de) 1985-09-23 1986-09-19 Löschkammer für Leistungsschalter mit Löschflüssigkeit, insbesondere für öl- oder flüssiggasarme Leistungsschalter

Country Status (2)

Country Link
EP (1) EP0217458A3 (de)
IT (1) IT206249Z2 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH293263A (de) * 1951-08-07 1953-09-15 Oerlikon Maschf Schalttopf für ölarme Schalter.
DE1021918B (de) * 1955-02-16 1958-01-02 Neumann Hochspannungs App K G Loescheinrichtung fuer elektrische Fluessigkeits-, insbesondere oelarme Leistungsschalter od. dgl.
GB1241684A (en) * 1968-10-04 1971-08-04 Reyrolle A & Co Ltd Improvements relating to arc control devices
DE2154194A1 (de) * 1971-10-30 1973-05-03 Sachsenwerk Licht & Kraft Ag Fluessigkeitsarmer hochspannungsleistungsschalter
EP0093076A2 (de) * 1982-04-26 1983-11-02 Cooper Power Systems, Inc. Primärschutzschalter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH293263A (de) * 1951-08-07 1953-09-15 Oerlikon Maschf Schalttopf für ölarme Schalter.
DE1021918B (de) * 1955-02-16 1958-01-02 Neumann Hochspannungs App K G Loescheinrichtung fuer elektrische Fluessigkeits-, insbesondere oelarme Leistungsschalter od. dgl.
GB1241684A (en) * 1968-10-04 1971-08-04 Reyrolle A & Co Ltd Improvements relating to arc control devices
DE2154194A1 (de) * 1971-10-30 1973-05-03 Sachsenwerk Licht & Kraft Ag Fluessigkeitsarmer hochspannungsleistungsschalter
EP0093076A2 (de) * 1982-04-26 1983-11-02 Cooper Power Systems, Inc. Primärschutzschalter

Also Published As

Publication number Publication date
EP0217458A3 (de) 1989-05-31
IT206249Z2 (it) 1987-07-13
IT8523190V0 (it) 1985-09-23

Similar Documents

Publication Publication Date Title
KR970071884A (ko) 전력 차단기
US5675308A (en) Current-limiting fuse and housing arrangement having a seal between an element and housing
US4778964A (en) Subminiature switch with common and stationary switching contacts
US5229561A (en) Puffer-type gas circuit breaker
EP0217458A2 (de) Löschkammer für Leistungsschalter mit Löschflüssigkeit, insbesondere für öl- oder flüssiggasarme Leistungsschalter
US3942144A (en) Contact holder for an electro-magnetic contactor
US4659887A (en) Switch device having an insulating screen inserted between the contacts during breaking
GB2058463A (en) Electric switching device with arc blowout means
US5081329A (en) Key assembly, switch assembly and method of making same
US3128360A (en) Interrupter structure having splitter plates of malleable material
US3671693A (en) Rocker switch
EP0228099B1 (de) Lichtbogenschaltkammer, insbesondere für mit Flüssigkeit gelöschte Lastschalter
CA1226886A (en) Timer with improved switch blade arrangement
US5436421A (en) Progressive switch
US4259555A (en) Self-extinguishing gas circuit interrupter
GB2119575A (en) Explosion-proof or flame-proof electrical switching device
CA1102379A (en) Fluid-blast circuit breaker comprising a pressure chamber releasing transverse arc-quenching jet of fluid
EP0130842A3 (de) Hochspannungsdruckgasschalter
EP0387761A3 (de) Selbstschalter, insbesondere Leitungsschutzschalter
EP0483840A2 (de) Hochspannungslastschalter
US2854551A (en) Device for disconnecting high-powered electric arcs
US4208557A (en) Switches
CA1115755A (en) Arc self-extinguishing switch device
US4633049A (en) Gas-blast switch
SE9002680L (sv) Automatbrytare, speciellt skyddsbrytare foer ledningar

Legal Events

Date Code Title Description
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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE CH DE FR GB LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE CH DE FR GB LI NL SE

17P Request for examination filed

Effective date: 19891009

17Q First examination report despatched

Effective date: 19900904

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19920605

RIN1 Information on inventor provided before grant (corrected)

Inventor name: TALPO, GIANPIETRO