US3046376A - Electrical switch - Google Patents

Electrical switch Download PDF

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Publication number
US3046376A
US3046376A US53595A US5359560A US3046376A US 3046376 A US3046376 A US 3046376A US 53595 A US53595 A US 53595A US 5359560 A US5359560 A US 5359560A US 3046376 A US3046376 A US 3046376A
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US
United States
Prior art keywords
switch
parts
arcs
terminals
fixed
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
US53595A
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English (en)
Inventor
Ingvaldsen Bernt
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National Industri AS
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Individual
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Publication date
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Publication of US3046376A publication Critical patent/US3046376A/en
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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
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
    • 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
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7092—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by several arcing chambers in series

Definitions

  • This invention relates to electrical switches of the kind comprising a quenching chamber containing quenching medium and provided with fixed contacts and an axiallymovable switch pin formed of electrically insulating and conducting parts, the arrangement being such that during opening of the switch, the conducting parts of the switch pin draw from some of the fixed contacts arcs which are in series with each other and produce pressure in the quenching medium so that the later fiows through and past the arcs for quenching the arcs.
  • the switch pin comprises insulating parts which in the open position of the switch partly define passages in which the arcs are exposed to the action of the flowing quenching medium.
  • the said passages may be of substantially circular cross-section where the arcs are exposed to the action of the flowing quenching medium.
  • a chanel open through the quenching chamber in all positions of the switch pin.
  • openended tubular conductors are arranged in the quenching chamber, the internal spaces of these tubular conductors forming portions of the said channel open through the quenching chamber.
  • the fixed contacts are electrically connected to fixed terminals arranged so that the arcs travel from the contacts and the switch pin to burn in gaps between the fixed terminals and are there xposed to the action of the fiowing quenching medium.
  • FIGS. 1 and 2 showing one switch in its closed and open positions respectively
  • H68. 3 and 4 showing a modified switch in its closed and open positions respectively.
  • the switch illustrated in FIGS. 1 and 2 comprises a quenching chamber 1 of electrically-insulating material in which are secured apertured connectors 25 and 31, openended tubular conductors 26 and 27, and fixed insulating parts 28, 29 and 30 which may be integral with the quenching chamber 1.
  • the quenching chamber 1 contains quenching medium and has outlets 13 and 14, which may be provided in known manner with valves (not shown) which allow quenching medium to flow out only when the pressure in the quenching chamber exceeds a predetermined value.
  • the quenching medium may be in the form of gas or liquid, alone or mixed with powder, and the powder and/ or insulating parts of the switch may be of known kinds which under the action of the arcs release gases which assist in the quenching of the arcs.
  • the connectors 25 and 31 have outlet apertures, and the insulating parts 28, 29 and 30 are shaped to partly define passages 8, 9 and 10 which widen towards their ends and communicate with the internal spaces 11 and 12 ice of the tubular conductors 26 and 27 so that there is a chanel open through the quenching chamber between the outlets 13 and 14.
  • this open channel permits a circulation of air to cool the switch and remove heat due to the passage of current whilst the switch is in the closed position, and it also assists cooling of the switch after the latter has been opened.
  • conductors 26 and 27, and connector 31 are fixed contacts 2, 3, 4, 5, 6 and 7 and fixed terminals 32, 33, 34, 35, 36 and 37.
  • a switch pin is axially movable in the quenching chamber 1 and is formed of electrically insulating parts 15, 19, 2t? and 21 and open-ended tubular conducting parts 16, 17 and 18, the parts 16, 17 and 18 being provided with terminals 38, 39 and 40 respectively and having internal spaces 22, 23 and 24 respectively.
  • the insulating parts 19, 2t) and 21 of the switch pin partly define the passages 8, 9 and It ⁇ in which the arcs are exposed to the action of the flowing quenching medium.
  • the switch pin is moved axially downwards from the position shown in FIG. 1 to the position shown in FIG. 2.
  • the terminals 38, 39 and 46 move down past the contacts 3, 5 and 7 three arcs in series with one another are struck and burn at first one between the terminal 38 and the contact 3, one between the terminal 39 and the contact 5, and one between the terminal 4% and the contact 7.
  • the modified switch shown in FIGS. 3 and 4 is similar in many respects to that shown in FIGS. 1 and 2, like reference numerals indicating like parts.
  • the conducting parts 17 and 18 of the switch pin are provided at their lower ends with terminals 41 and '42 respectively and the insulating parts 19, 29 and 21 of the switch pin are shaped so that when the switch is in the open position shown in FIG.
  • the passages S, 9 and 10 are :of substantially circular cross-section where the arcs burn in gaps between the fixed terminals and are exposed to the action of the flowing quenching medium; just prior to being quenched the lower arc burns with its lower end on the terminal 32 and its upper end on the terminals 33 and/ or 41, the middle arc burns with its lower end on the terminal 34 and/ or 39 and its upper end on the terminal 35 and/ or 42, and the upper arc burns with its lower end on the terminal 30 and its upper end on the terminal 37, and it will be seen that all these terminals lie near to the common longitudinal central axis of the passages 55, J and 10 so that the arcs are all exposed effectively to the action of the flowing quenching medium.
  • the invention provides improved switches of the kind referred to in which quenching medium is stored in spaces in the moving and stationary parts of the switch and is caused to fiow through passages each defined partly by a moving part and partly by a stationarypart of the switch.

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  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US53595A 1959-09-25 1960-08-31 Electrical switch Expired - Lifetime US3046376A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL34332A DE1170035B (de) 1959-09-25 1959-09-25 Elektrischer Schalter mit Lichtbogen-loeschung durch einen von Lichtbogen selbst erzeugten Loeschmittelstrom

Publications (1)

Publication Number Publication Date
US3046376A true US3046376A (en) 1962-07-24

Family

ID=7266634

Family Applications (1)

Application Number Title Priority Date Filing Date
US53595A Expired - Lifetime US3046376A (en) 1959-09-25 1960-08-31 Electrical switch

Country Status (6)

Country Link
US (1) US3046376A (en, 2012)
BE (1) BE595353A (en, 2012)
CH (1) CH382257A (en, 2012)
DE (1) DE1170035B (en, 2012)
GB (1) GB900254A (en, 2012)
NL (1) NL255407A (en, 2012)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR878638A (fr) * 1941-07-14 1943-01-26 Interrupteur à arc soufflé
US2477781A (en) * 1946-10-07 1949-08-02 Westinghouse Electric Corp Circuit interrupter
DE939582C (de) * 1952-12-02 1956-02-23 Calor Emag Elek Zitaets Ag Schalter mit Lichtbogenloeschung in Fluessigkeit
US2908789A (en) * 1957-07-19 1959-10-13 Lange Emil Electric circuit breaker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR878638A (fr) * 1941-07-14 1943-01-26 Interrupteur à arc soufflé
US2477781A (en) * 1946-10-07 1949-08-02 Westinghouse Electric Corp Circuit interrupter
DE939582C (de) * 1952-12-02 1956-02-23 Calor Emag Elek Zitaets Ag Schalter mit Lichtbogenloeschung in Fluessigkeit
US2908789A (en) * 1957-07-19 1959-10-13 Lange Emil Electric circuit breaker

Also Published As

Publication number Publication date
CH382257A (de) 1964-09-30
NL255407A (en, 2012) 1964-03-25
GB900254A (en) 1962-07-04
DE1170035B (de) 1964-05-14
BE595353A (fr) 1961-01-16

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