US3016437A - Electrical switch - Google Patents

Electrical switch Download PDF

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Publication number
US3016437A
US3016437A US49384A US4938460A US3016437A US 3016437 A US3016437 A US 3016437A US 49384 A US49384 A US 49384A US 4938460 A US4938460 A US 4938460A US 3016437 A US3016437 A US 3016437A
Authority
US
United States
Prior art keywords
terminals
switch pin
arcs
switch
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.)
Expired - Lifetime
Application number
US49384A
Other languages
English (en)
Inventor
Lange Emil
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.)
National Industri AS
Original Assignee
National Industri AS
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 National Industri AS filed Critical National Industri AS
Application granted granted Critical
Publication of US3016437A publication Critical patent/US3016437A/en
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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/06—Insulating body insertable between contacts
    • 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

Definitions

  • ri ⁇ his invention relates to electric switches of the kind comprising a switch pin which moves axially in a quenching chamber containing quenching medium and draws arcs which generate pressure in the quenching medium so that the latter is caused to flow past and quench the arcs.
  • the invention is intended to provide an improved switch of the kind referred to, arranged so that the arc or arcs are not drawn out to such an extent that the rise of pressure in the quenching medium is excessive. In some known switches excessive rise of pressure leads to rupturing of the quenching chamber.
  • a switch of the kind referred to is characterised in that the switch pin comprises conducting parts and insulating parts, and fixed contacts and terminals are arranged so that in operation the conducting parts of the switch pin draw from the contacts arcs which are in series with one another and then the arcs move and burn in gaps between the terminals and are there subjected to the action of the quenching medium as the latter is flowing towards one or more outlets of the quenching chamber.
  • the switch shown in FlG. l comprises a quenching chamber 1 filled with quenching medium and accommodating xed contacts, 2, 3, 4 and 5 and an axiallymovable switch pin consisting of conducting parts 6 and 7 and insulating parts 8 and 9.
  • the switch pin slides axially in guides 10 and 11 in the quenching chamber 1.
  • the iixed contacts 3, 4 are connected to each other through a conducting tube 12 provided with terminals 14 and 15.
  • a fixed terminal 13 has an aperture forming an outiiow opening for quenching medium in the quenching chamber 1, and also has an aperture in which the switch pin slides.
  • a tixed terminal 16 on the Contact 5 is below a narrow passage 17 formed in an insulating mass, and this passage 17 is open through a slot 18 formed so that an arc between the contacts 4 and 5 can be guided to the terminals and 16.
  • the space accommodating the terminal 14 communicates through a slot 19 with the space between the terminal 2 and contact 3.
  • the spacing of the terminals from one another is less than that of the contacts 2, 3 and 4, 5.
  • the tube 12 constituting the connection between the contacts 3 and 4 contains a volume of quenching medium which is not subjected directly to heating by the arcs.
  • the guides 10 and 11 for the switch pin are always closed by the switch pin.
  • the switch is shown in the closed position, the path of the current being through the contact 2, the part 6, the contact 3, the tube 12, the contact 4, the part 7, and the contact 5.
  • Pressure in the quenching medium is generated immediately on drawing of the arcs by the switch pin, and this pressure is maintained and built up to the desired maX- imum pressure values due to the length of the arc between the terminals 15 and 16.
  • quenching medium Due to this pressure rise quenching medium iiows past the terminal 15 and past the terminal 14 and out through the terminal 13, bringing about a reliable quenching of the arcs.
  • the ilow of quenching medium past the terminals 14 and 13 is very effective because it comprises quenching medium expelled from the tube 12 and not heated by the arc.
  • the switch pin part 7 comes into its end position in parallel with the tube 12, the guides 1t) and 11 for the switch pin remaining closed.
  • the pressure rise in the quenching chamber can have no etlect upon the switch pin movement. Furthermore the quenching operation is not unfavourably inuenced by the switch pin movement because after a specic time it is independent of the rate of switch pin movement.
  • the lengths of the switch pin parts can be such that the upper arc is struck later than the lower.
  • the outflow opening of the quenching chamber can be provided with a valve which only opens at a predetermined pressure value.
  • Gas or liquid with or without inert powder can be used as the quenching medium.
  • Z-iixed contacts 21, 22, 23, 24, 25 and 26 are arranged in a quenching chamber 20 iilled with quenching medium and engage an axially-movable switch pin comprising conducting parts 27, 28 and 29 and insulating parts 30, 31 and 32.
  • the contacts 22 and 23 are electrically connected through a tube 34 and the contacts 24 and 25 are electrically connected through a tube 35.
  • the switch pin slides in guides 36 and 37 and closes these guides in every switch position.
  • Fixed terminals 38, 39, 4t), 41, 42 and 43 are arranged so that the gaps between them are shorter than the correspending gaps between the fixed contacts.
  • Arcs formed between the terminals 38 and 39 and between the terminals 42 and 43 are quenched by the quenching medium issuing through outilow openings 44 and 45.
  • the central gap between the terminals 40 and 41 is formed an arc which serves for the pressure generation and is also subjected to the quenching action.
  • a narrow channel 46 for this purpose is provided in order on the one hand to generate a very effective pressure rise and on ,and 24.
  • the switch is shown in the closed position, the path of the current being through the contact 2i, the part 27, the Contact 22, the tube 34, the contact 23, the part 23, the contact 24, the tube 35, the contact 25, the part 29, and the contact 26.
  • the pressure rise generated by the middle aro also serves, however, to expose this arc itself to an eifective ⁇ iiow of quenching medium.
  • Near the outlet openings of the narrow channel 46 are the terminals 40 and 41 on which the roots of the middle arc lie directly in the flow of the quenching medium issuing from the narrow channel 46.
  • each of the illustrated switches may be provided with one or more valves which permit the quenching medium to ow out of rality of fixed contacts in said quenching chamber, at least Y one fixed conductor in said quenching chamber, each said iixed conductor interconnecting two of said ixed contacts, a plurality of arc terminals attachedl one to each end of each said fixed conductors, an axially-slidable switch pin extending through said quenching chamber in sliding contact with all of said xed contacts, at least one insulating body forming slots and passages in said quenching chamber, each said slot affording communication between one of said passages and said switch pin and said passages leading to said arc terminals, and two switch pin guides .secured one at each end of said quenching chamber, said switch pin consisting of insulating pin
  • each said iixed conductor being of ⁇ open-ended tubular form with an internal space accommodating quenching medium and communicating with two of said passages, the arrangement being such that under pressure generated by said arcs quenching medium from inside each said .fixed conductor is forced into one of said passages.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US49384A 1959-08-24 1960-08-12 Electrical switch Expired - Lifetime US3016437A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL34035A DE1188696B (de) 1959-08-24 1959-08-24 Elektrischer Schalter mit Loeschkammer

Publications (1)

Publication Number Publication Date
US3016437A true US3016437A (en) 1962-01-09

Family

ID=7266522

Family Applications (1)

Application Number Title Priority Date Filing Date
US49384A Expired - Lifetime US3016437A (en) 1959-08-24 1960-08-12 Electrical switch

Country Status (4)

Country Link
US (1) US3016437A (uk)
DE (1) DE1188696B (uk)
GB (1) GB899159A (uk)
NL (1) NL254879A (uk)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105513875A (zh) * 2015-12-24 2016-04-20 国家电网公司 三相高电压大电流连接、隔断装置

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
US2854551A (en) * 1954-06-18 1958-09-30 Lange Emil Device for disconnecting high-powered electric arcs
US2908789A (en) * 1957-07-19 1959-10-13 Lange Emil Electric circuit breaker

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE288168C (uk) *
DE338062C (de) * 1919-12-16 1921-06-13 Siemens Schuckertwerke G M B H Durch Explosionskraefte bewegter Schalter
US1912932A (en) * 1927-08-29 1933-06-06 Westinghouse Electric & Mfg Co Circuit interrupter
DE644059C (de) * 1927-12-16 1937-04-23 Frida Strauss Geb Ruppel Schalter mit Lichtbogenloeschung durch Druckgas
DE547548C (de) * 1929-12-04 1932-03-24 Sachsenwerk Licht & Kraft Ag Elektrischer Schalter mit zwei in Gas angeordneten Unterbrechungsstellen
DE551349C (de) * 1929-12-21 1932-05-30 Const Electr De Delle Sa Atel Funkenhoerner
DE622036C (de) * 1931-02-09 1935-11-18 Const Elecktriques De Delle Sa Elektrischer Druckgasschalter
DE705099C (de) * 1936-11-11 1941-04-17 Emil Lange Elektrischer Schalter mit Lichtbogenloeschung durch einen Druckgasstrom
FR904351A (fr) * 1943-05-19 1945-11-05 Licentia Gmbh Dispositif interrupteur, notamment pour courant continu à haute tension

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
US2854551A (en) * 1954-06-18 1958-09-30 Lange Emil Device for disconnecting high-powered electric arcs
US2908789A (en) * 1957-07-19 1959-10-13 Lange Emil Electric circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105513875A (zh) * 2015-12-24 2016-04-20 国家电网公司 三相高电压大电流连接、隔断装置

Also Published As

Publication number Publication date
NL254879A (uk) 1964-03-25
DE1188696B (de) 1965-03-11
GB899159A (en) 1962-06-20

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