US1904519A - Electric circuit interrupter - Google Patents

Electric circuit interrupter Download PDF

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Publication number
US1904519A
US1904519A US564889A US56488931A US1904519A US 1904519 A US1904519 A US 1904519A US 564889 A US564889 A US 564889A US 56488931 A US56488931 A US 56488931A US 1904519 A US1904519 A US 1904519A
Authority
US
United States
Prior art keywords
contacts
pressure
arc
circuit
valve
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
US564889A
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English (en)
Inventor
William E Paul
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority to DENDAT604649D priority Critical patent/DE604649C/de
Application filed by General Electric Co filed Critical General Electric Co
Priority to US564889A priority patent/US1904519A/en
Priority to GB26701/32A priority patent/GB386283A/en
Application granted granted Critical
Publication of US1904519A publication Critical patent/US1904519A/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
    • H01H33/70—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
    • H01H33/80—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve
    • H01H33/84—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being liquid, e.g. oil
    • H01H33/85—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being liquid, e.g. oil wherein the contacts are opened by the flow of liquid

Definitions

  • contacts 5 and 6 are provided with piston members 29 and 30 respectively, subject to pressure within the chamber 20, and the contacts are mounted so as to separate within a passage 31 exhausting the chamber 20 to the exterior. rlhe pistons 29 and 30 are acted upon by springs 32 and 33 normally biasing the contacts 5 and 6 into engagement.
  • contact 7. is provided with a piston 36 mounted within the housing 9 so that one face is subject to arcing pressure whereas the other face is subject only to low pressure through the opening 37.
  • the piston 36 is biased upwardly by a spring 38 whichmay be designed in accordance with the operating pressures desired.
  • ⁇ .dierential pressure acting on the piston 36 causes the same to move downwardly so that contact 7 ⁇ follows contact 8 thereby limiting lengthening of the arc until the contact ⁇ 8 moves entirely out of the housing.
  • the pilot valve 23 is opened with the result that the pressure in chamber 17 at once opens the valve 18 due to the greater area of piston 21 ⁇ and high pressure is immediately communicated to interrupting chamber 20.
  • the pistons 29 and 30 are thereupon forced away from each other against the bias of their springs causing separation of the contacts 5 and 6.while at the same time insulating liquid is exhausted at high velocity through the passage 31 and between the contacts extin- ⁇ wed e and ishing the arc drawn at these contacts. ince the gas and arc products are formed in the chamber 13 and remain in that region until the valve 18 is ope-ned, it will be apparent that the blast of insulating liquid between the contacts 5 and 6 is subst. ntially unaffected by arc products.
  • the pressure generating arc is likewise extinguished so that the ressure within the contact housing is rapidy dissipated.
  • the housings 9 thereupon refill with oil through the various openings so that the apparatus is in readiness for another operation.
  • the pilot valve 23 may likewise be maintained open so that the space behind the piston 21 is refilled with oil and the valve 18 closed. Closing of the circuit interrupter b upward movement of the bridging mem r 1 causes engagement of the contacts 7 and 8 and releases the pilot valve so that it is moved onto its seat.
  • a resilient connection or wipe between the contact 7 and piston 36 comprising a spring 41 which is located between the piston 36 and a shoulder 42 forming part of the contact 7.
  • the piston 36 is mounted for rela ⁇ tive movement with respect to the Contact 7.
  • the pressure generating arc is formed by separation of the contacts 7 and 8. Since the actual resistance of the arc is quite small, the formation of the pressure generating arc at once does not increase the voltage across the interrupter terminals so that there is little danger of arcing-over' at the separating primary contacts.
  • the arcing pressure may thereupon build up until the primary contacts have separated a predetermined distance, at which time the valve 18 is opened as illustrated and the circuit at the contacts 5 and 6 immediately interrupted by the high velocity oil blast through the interrupting chamber 20. In this manner the interrupting time is reduced to a minimum and arcing at the primary contacts is precluded sincey interruption of the circuit does not occur until the primary contacts are separated a safe distance.
  • the apparatus is. ".shown in Fig. 2 at the moment of circuit interruption, the primary contacts 39 and 40 being a safe distance apart so that the oil blast is eective to interrupt the circuit.
  • valve 18 it may be desirable to eliminate the valve 18 so that there is direct communication between the interrupting chamber and pressure generating chamber. This arrangement need not involve appreciable change in design of the housing other than possible closer spacing of the chambers.
  • a circuit ⁇ interrupter of the fluid-break type comprising a pair of contacts separable in an arc extinguishing liquid to form a pressure generating break connected in serieswith a pair of independent and separately movab ⁇ e current interrupting contacts, and means for directing pressure generated by arcing at said break so as to cause separation of said independent current interrupting contacts and force a blast of insulating liquid between the same extinguishing arcing.
  • a circuit interrupter of the fluid-break type comprising two independent sets of separately movable contacts connected in series immersed in an arc extinguishing liquid, one set of contacts forming an initial pressure generating arc, and means directing said pressure so as to separate the other set of contacts and force a jet of insulating liquid between the saineV extin ishing arcing.
  • -A circuit interrupter of the Huid-break type comprising two independent sets of separately movable contacts 'connected in series immersed in an insulating liquid, one of said set-s' forming an initial pressure generating arc, means directing said pressure so as to cause subsequent separation of the other set of contacts and force a jet of insulating liquid therebetween, and means responsive to said generated pressure limiting the length of said initial arc.
  • a circuit interrupter of the fluid-break type comprising a plurality of independent sets of separately movable contacts connected in series and immersed in insulating liquid Within separate chambers, one of said sets forming in one chamber a pressure generating arc, means directing said pressure into another chamber causing interruption of arcing at another set of said contacts, and a valve controlling communication between said chambers.
  • a circuit interrupter of the Huid-break type comprising two sets of'contacts connected in series immersed in insulating liquid, one of said sets forming a pressure generating arc, means directing said pressure so as to cause separation of and interruption of arcin at the other set o'fsaid contacts, and a va ve controlling and delaying the application of said pressure.
  • a circuit interrupter of the fluid-break type comprising a pair of main current interrupting contacts connected in series with a pair of independent and separately movable pressure generating contacts, said contacts immersed in an insulating liquid, means directing pressure generated'at said last named contactsso as to cause separation of said main contacts and force a jet of insulating liquid between the same, a valve-controlling application of said pressure to said main conv tacts, and means controlling actuation of said valve in accordance with circuit opening movement.
  • a circuit interrupter of the Huid-break type comprising means forming a pressure generating break in an insulating liquid, cir-.
  • break type including primary current carrying contacts, arc extinguishing means comprising circuit interrupting meansand contacts forming a pressure generating arc immediately after separation of said primary contacts, said pressure tending to cause a blast of insulating liquid across the arc.
  • a circuit interrupter of the fluid-break type including pressure generating means within an insulating .liquid and coacting contants between which insulating liquid is forced by said pressure interrupting the circuit, means controlling application of said pressure comprising a valve actuated by said pressure, and a pilot valve reducing the pressure on one ⁇ side of said valve causing opening thereof.
  • a circuit interrupter of the Huidbreak type comprising contact housing structure immersed in an insulating liquid, relatively movable contacts formin a pressure generating arc Within a cham er in said housing, said pressure tending to force insulating liquid through a second chamber and between coacting contacts therein to interrupt the circuit, a valve mounted Within said housing controlling communication between said chambers, a pilot valve controlling the opening of said valve by said arcing pressure, and cam structure related to said movable contact opening said pilot valve after predetermined circuit opening movement.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Circuit Breakers (AREA)
  • Breakers (AREA)
US564889A 1931-09-24 1931-09-24 Electric circuit interrupter Expired - Lifetime US1904519A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DENDAT604649D DE604649C (enrdf_load_stackoverflow) 1931-09-24
US564889A US1904519A (en) 1931-09-24 1931-09-24 Electric circuit interrupter
GB26701/32A GB386283A (en) 1931-09-24 1932-09-26 Improvements in and relating to liquid-break electric switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US564889A US1904519A (en) 1931-09-24 1931-09-24 Electric circuit interrupter

Publications (1)

Publication Number Publication Date
US1904519A true US1904519A (en) 1933-04-18

Family

ID=24256311

Family Applications (1)

Application Number Title Priority Date Filing Date
US564889A Expired - Lifetime US1904519A (en) 1931-09-24 1931-09-24 Electric circuit interrupter

Country Status (3)

Country Link
US (1) US1904519A (enrdf_load_stackoverflow)
DE (1) DE604649C (enrdf_load_stackoverflow)
GB (1) GB386283A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456926A (en) * 1944-08-10 1948-12-21 Westinghouse Electric Corp Circuit interrupter
US2470611A (en) * 1947-01-25 1949-05-17 Westinghouse Electric Corp Circuit interrupter
US2488569A (en) * 1944-10-04 1949-11-22 Westinghouse Electric Corp Circuit interrupter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE555843A (enrdf_load_stackoverflow) * 1956-03-22
DE1100759B (de) * 1960-02-18 1961-03-02 Siemens Ag Schaltanordnung fuer Wechselstrom

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456926A (en) * 1944-08-10 1948-12-21 Westinghouse Electric Corp Circuit interrupter
US2488569A (en) * 1944-10-04 1949-11-22 Westinghouse Electric Corp Circuit interrupter
US2470611A (en) * 1947-01-25 1949-05-17 Westinghouse Electric Corp Circuit interrupter

Also Published As

Publication number Publication date
DE604649C (enrdf_load_stackoverflow)
GB386283A (en) 1933-01-12

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