US2281385A - Electric circuit breaker - Google Patents

Electric circuit breaker Download PDF

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Publication number
US2281385A
US2281385A US335828A US33582840A US2281385A US 2281385 A US2281385 A US 2281385A US 335828 A US335828 A US 335828A US 33582840 A US33582840 A US 33582840A US 2281385 A US2281385 A US 2281385A
Authority
US
United States
Prior art keywords
contacts
arc
circuit breaker
auxiliary electrode
electric circuit
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
US335828A
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English (en)
Inventor
Saint-Germain Jacques Marie
Balachowsky Georges
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
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US2281385A publication Critical patent/US2281385A/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
    • H01H33/16—Impedances connected with contacts
    • H01H33/164—Impedances connected with contacts the impedance being inserted in the circuit by blowing the arc onto an auxiliary electrode
    • 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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/92—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being liquid, e.g. oil

Definitions

  • An object of our invention is to provide an improved circuit breaker which will be efllcient and positive in its interrupting eii'ect throughout the entire range of current rating.
  • a further object 01' our invention is to provide a circuit breaker which has a large interrupting capacity and high interrupting speed and which has an operation tree of any dangerous overvoltages regardless of the electrical characteristics of the system which is to be interrupted.
  • Fig. 1 is a side elevation partly in section or a high voltage electric circuit breaker embodying our invention
  • Figs. 2 and 3 illustrate a portion 01 the electric circuit breaker illustrated in Fig. 1 in its two successive phases of operation.
  • Fig. 1 we have illustrated a high voltage vertical electric circuit breaker oi the impulse type which includes relastationary cylinder I5
  • the member N therefore acts as an interrupting chamber and also as a plunger piston, since it is mounted for reciprocatory movement.
  • the plunger piston I may be moved in any suitable manner and we have found a practically eiilclent structure obtaintsavzh'eln the piston is attached to themovable con c ment and may be moved by any suitable structure, such as by an operating member I1 and links II which are in a pedestal I.
  • the pedestal II also forms a base member on which a hollow cylinder 2
  • the circuit breaker may be suitably connected in a line through terminal; 22 and 23.
  • Any suitable source 0! arc-extinguishing tluid completely immersed in is employed, such as air, a source under pressur is piped to the interrupting chamberwith a valve arrangement disposed to be opened when it is desired to extinguish the arc.
  • the actuating member I1 when it is desired to interrupt the circuit 22, 23 the actuating member I1 is moved so as to allow the shaft i8 and the movable contact II to move away from the contact ll. Upon this movement an arc is formed between the relatively movable contacts as will be seen in Fig. 2. Since the plunger I4 is mounted for movement with the movable contact H the plunger will also descend and cause the arc-extinguishing fluid which is in the cylinder I to be expelled.
  • a barrier 21 is provided below the vents so as to force the arc-extinguishing'fluid to pass transversely of the interrupting chamber and between the relatively movable contacts before it passes out through the vents 26,
  • the barrier 21 may also act as the support for the member I on the movable contact H.
  • vents 28 which are in the side walls of the plunger piston H are no longer obstructed by Some of the arc-extinguishing fluid will therefore be displaced across the arc between the contact ll and the auxiliary electrode and out through the transverse vents 28. Since, as above stated,
  • the resistor [3 acts as an impact resistance and reduces considerably the current in-rush, for instance, in case the circuit breaker is closed on a transformer at no load.
  • An electric circuit breaker for .high voltage power circuits including relatively movable interrupting contacts, an auxiliary electrode movable adjacent to the arc gap formed between said contacts, aresistor, said resistor being electrically connected between said auxiliary electrode and one of said contacts, actuating means for said relatively movable contacts and said auxiliary electrode; ,said relative movement of said contacts and said auxiliary electrode causing I first, formation of a predetermined length of are takes place is considerably 4 the circuit is completely opened.
  • An electric circuit breaker for high voltage power circuits including relatively movable interrupting contacts, an auxiliary electrode movable adjacent to the arc gap formed between said contacts, a current limiting resistance interconnecting said electrode and the circuit, actuating means for said contacts and said auxiliary electrode, said relative movement of said contacts and said auxiliary electrode causing flrst, arcing between said interrupting contacts and finally, after predetermined separation of said contacts arcing at reduced current between said electrode and one of said contacts, and means including an arc-extinguishing.
  • An electric circuit breaker for high voltage power circuits includingrelativei-y movable interrupting contacts, an auxiliary electrode movable into the region between said contacts, a resistance interconnecting said electrode and the circuit for limiting current flow through said electrode, actuating means for said contacts and said auxiliary electrode, said relative movement of said contacts and said auxiliary electrode causing first, arcing between said interrupting contacts and second, reduced current arcing between said electrode and one oi said contacts ai'ter interruption 01 said first-named arcing, an arc-extinguishing fluid, an insulating piston structure operatively connected to one of said relatively movable contacts and said electrode, and means including said piston structure for causing said fluid to pass over said arc between said interrupting contacts to extinguish it after predetermined separation
  • An electric circuit breaker including relatively movable contacts, an auxiliary electrode movable into the region between said movable contacts, actuating means for said contacts and said auxiliary electrode, said relative movement of said contacts and said auxiliary electrode causing arcing between said contacts and between said electrode and one of said contacts, an arc-extinguishing fluid, a movable hollow piston structure having an open end and a plurality of groups of transverse vents, a relatively stationary cylinderoi slightly larger diameter than said piston and so constructed and arranged as to receive the open end of said piston, and perforations in said cylinder, said piston structure being movable with said actuating means for causing said fluid to be displacedj' from said cylinder through said perforations until the arc between said contacts is of a, predetermined length at which time said piston walls will substantially close said perforations and allow said fluid to ma over the are between said contacts to extinguish it and through one of said groups of vents and for causing said fluid to pass over said arc between said electrode and said one of said
  • An electric circuit breaker for high voltage power circuits comprising relatively movable interrupting contacts, means for separating said contacts to form an arc gap of predetermined length, means for directing a fluid blast through said gap for extinguishing the power arc, an auxiliary electrode movable in accordance with said contact separating movement to a position adjacent to said arc gap for defining a second arc gap shorter than said first-named arc gap whereby the recovery voltage atterarc interruption at said contacts will establish a second are at said second arc gap, a current limiting resistance interconnecting said electrode and the circuit for decreasing the intensity of said second arc, and means for also directing a fluid blast across said second arc gap for flnally interrupt ing the circuit.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Circuit Breakers (AREA)
US335828A 1939-06-22 1940-05-17 Electric circuit breaker Expired - Lifetime US2281385A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR860421T 1939-06-22

Publications (1)

Publication Number Publication Date
US2281385A true US2281385A (en) 1942-04-28

Family

ID=9333482

Family Applications (1)

Application Number Title Priority Date Filing Date
US335828A Expired - Lifetime US2281385A (en) 1939-06-22 1940-05-17 Electric circuit breaker

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Country Link
US (1) US2281385A (enrdf_load_html_response)
BE (1) BE440836A (enrdf_load_html_response)
FR (1) FR860421A (enrdf_load_html_response)
GB (1) GB537364A (enrdf_load_html_response)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2757261A (en) * 1951-07-19 1956-07-31 Westinghouse Electric Corp Circuit interrupters
US2781435A (en) * 1951-03-18 1957-02-12 Heilmann Philipp Arc-extinguishing mechanism for electric switches
US2788418A (en) * 1954-03-22 1957-04-09 Gertrude M Idzkowski Circuit interrupter
US2854551A (en) * 1954-06-18 1958-09-30 Lange Emil Device for disconnecting high-powered electric arcs
US2889434A (en) * 1951-10-26 1959-06-02 Westinghouse Electric Corp Switching device
US2919330A (en) * 1956-01-30 1959-12-29 Oerlikon Engineering Company Low-oil content high-tension oil circuit breaker
US2924690A (en) * 1954-12-24 1960-02-09 Westinghouse Electric Corp Circuit interrupters
US3529108A (en) * 1966-09-01 1970-09-15 Westinghouse Electric Corp Nozzle and contact construction for fluid-blast circuit interrupters
US3688242A (en) * 1969-10-24 1972-08-29 Morganite Resistors Ltd Shunt for oil-immersed circuit breaker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5349019A (en) * 1988-12-24 1994-09-20 Hoechst New copolymers, mixtures thereof with poly(meth)acrylate esters and the use thereof for improving the cold fluidity of crude oils

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781435A (en) * 1951-03-18 1957-02-12 Heilmann Philipp Arc-extinguishing mechanism for electric switches
US2757261A (en) * 1951-07-19 1956-07-31 Westinghouse Electric Corp Circuit interrupters
US2889434A (en) * 1951-10-26 1959-06-02 Westinghouse Electric Corp Switching device
US2788418A (en) * 1954-03-22 1957-04-09 Gertrude M Idzkowski Circuit interrupter
US2854551A (en) * 1954-06-18 1958-09-30 Lange Emil Device for disconnecting high-powered electric arcs
US2924690A (en) * 1954-12-24 1960-02-09 Westinghouse Electric Corp Circuit interrupters
US2919330A (en) * 1956-01-30 1959-12-29 Oerlikon Engineering Company Low-oil content high-tension oil circuit breaker
US3529108A (en) * 1966-09-01 1970-09-15 Westinghouse Electric Corp Nozzle and contact construction for fluid-blast circuit interrupters
US3688242A (en) * 1969-10-24 1972-08-29 Morganite Resistors Ltd Shunt for oil-immersed circuit breaker

Also Published As

Publication number Publication date
BE440836A (enrdf_load_html_response)
FR860421A (fr) 1941-01-14
GB537364A (en) 1941-06-18

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