US2729721A - High tension circuit breakers - Google Patents

High tension circuit breakers Download PDF

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Publication number
US2729721A
US2729721A US342890A US34289053A US2729721A US 2729721 A US2729721 A US 2729721A US 342890 A US342890 A US 342890A US 34289053 A US34289053 A US 34289053A US 2729721 A US2729721 A US 2729721A
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United States
Prior art keywords
resistances
container
gaps
breaking gaps
high tension
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Expired - Lifetime
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US342890A
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Forwald Haakon
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ABB Norden Holding AB
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ASEA AB
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Publication of US2729721A publication Critical patent/US2729721A/en
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    • 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
    • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc

Definitions

  • the circuit breaker is provided with an ordinary disconnecting switch
  • the residual current flowing through the resistance is interrupted by said disconnecting switch.
  • the different extinguishing chambers are provided with separate switches interrupting the chain of voltage dependent resistances.
  • the resistances may be arranged in leading through insulators attached to the wall of the extinguishing chamber or compressed air container. It is also possible to arrange the resistances inside the air container or in insulators arranged outside the different air containers.
  • Fig. 1 shows schematically the connection of the resistances
  • Fig. 2 schematically shows a circuit breaker having two air containers arranged on separate insulators, each container having two insulating bushings carrying the main breaking gaps and a pair of insulating bushings containing the voltage dependent resistances.
  • Fig. 3 a circuit breaker is shown having a pair of insulating bushings carrying the main breaking gaps, whereas two voltage dependent resistances are arranged across the said main breaking gaps and arranged inside the air container.
  • Fig. 1 designates schematically compressed air containers containing main breaking gaps 2 and auxiliary breaking gaps 3. The latter serve to connect the voltage dependent resistances 4 to form a chain connected in parallel with the whole series of breaking gaps 2.
  • Fig. 2 1 designates compressed air containers mounted on pillar insulators 5 which rest upon a base plate 6.
  • insulating bushings 7 which carry operating cylinders 8 for the main breaking gaps 9.
  • 10 is an operating cylinder for auxiliary breaking gaps 11 serving to connect the voltage 2,729,721 Patented Jan. 3, 1956 dependent resistances 4, which are mounted inside insulating bushings 12 inserted in the wall of the container 1.
  • 13 is an outlet valve for the escape of air from the compressed air container, said valve being operated simultaneously with the bridge 14 of the auxiliary breaking gaps 11.
  • the contacts in the main breaking gaps are provided with a boring, so that the air from the container 1 escapes through said boring out through the outlet valve 13. This boring is, however, not shown on the drawing.
  • the resistances 4 in the dilferent bushings are joined with each other by conductors 15 to form a chain connected with the chain of main breaking gaps in the points 16 and 17, the chain of the breaking gaps being connected by conductors 18.
  • the voltage dependent resistances 4 are carried by the insulating bushings 7 and are connected with each other by the bridge 14 of the auxiliary breaking gaps 11.
  • the bridge 14 is, as in Fig. 2, operated by the operating cylinder 10 and the main breaking gaps are operated by the operating cylinders 8.
  • the outlet valve 13 is also operated by the operating cylinder 10, and the whole container 1 is carried by the insulator pillar 5 mounted on the base plate 6.
  • An air blast circuit breaker comprising a compressed air container, a plurality of breaking gaps connected in series and enclosed within said container, insulating means serving to support said container, a series of voltage-dependent resistances connected in parallel with only the extreme ends of the series-connected breaking gaps, and auxiliary breaking gaps connected in series with the said resistances and located within the said container.
  • An air blast circuit breaker comprising a plurality of compressed air containers, breaking gaps located in each container and connected with each other in series, insulating means supporting each of said containers, a series of voltage-dependent resistances connected in parallel with only the extreme ends of the series-connected breaking gaps, and auxiliary breaking gaps connected in series with the said resistances and located within said containers.
  • An air blast circuit breaker according to claim 1 comprising insulating bushings inserted in the walls of said container and carrying the stationary contacts of the auxiliary breaking gaps, the said resistances being inserted in said bushings.
  • An air blast circuit breaker comprising insulating bushings mounted in the walls of the air container and carrying the stationary contacts of the auxiliary breaking gaps, the said resistances being arranged at least partly outside the air container and within the insulating bushings.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Gas-Insulated Switchgears (AREA)

Description

Jan. 3, 1956 H. FORWALD HIGH TENSION CIRCUIT BREAKERS Filed March 17, 1953 2 Sheets-Sheet 1 /l'\ WA 1 0r Haakon fbrwa/d Jan. 3, 1956 H. FORWALD 2,729,721
HIGH TENSION CIRCUIT BREAKERS Filed March 17, 1953 2 Sheets-Sheet 2 r5 rq I 4 5 f4 :1 4
/r\ Vl'l for" Ha a kon Forwa 7d United States Patent 015cc HIGH TENSION cnzcurr BREAKERS Haakon Forwald, Ludvika, Sweden, assignor to Alhnanna Svenska Elektriska Aktiebolaget, Vasteras, Sweden, a Swedish corporation Application March 17, 1953, Serial No. 342,890 Claims priority, application Sweden March 19, 1952 Claims. (Cl. 200-145) In modern high tension circuit breakers generally a voltage dependent resistance is coupled in parallel with the breaking gaps. In the case that the circuit breaker contains a plurality of breaking gaps each gap is provided with a separate parallel resistance. This device, however, is combined with a serious disadvantage in that if one of the gaps should reignite, the resistance in parallel with it will be short-circuited by the arc and consequently the remaining resistances in the chain will be over-loaded.
According to the present invention this disadvantage is avoided thereby that in a circuit breaker having a plurality of breaking elements the whole series of breaking gaps is connected in parallel with a series of voltage dependent resistances which are connected with the breaking gaps only at the ends of the series.
In the case that the circuit breaker is provided with an ordinary disconnecting switch, the residual current flowing through the resistance is interrupted by said disconnecting switch. In circuit breakers without any external disconnecting switch the different extinguishing chambers are provided with separate switches interrupting the chain of voltage dependent resistances. In this case the resistances may be arranged in leading through insulators attached to the wall of the extinguishing chamber or compressed air container. It is also possible to arrange the resistances inside the air container or in insulators arranged outside the different air containers.
Fig. 1 shows schematically the connection of the resistances, whereas Fig. 2 schematically shows a circuit breaker having two air containers arranged on separate insulators, each container having two insulating bushings carrying the main breaking gaps and a pair of insulating bushings containing the voltage dependent resistances. In Fig. 3 a circuit breaker is shown having a pair of insulating bushings carrying the main breaking gaps, whereas two voltage dependent resistances are arranged across the said main breaking gaps and arranged inside the air container.
In Fig. 1, 1 designates schematically compressed air containers containing main breaking gaps 2 and auxiliary breaking gaps 3. The latter serve to connect the voltage dependent resistances 4 to form a chain connected in parallel with the whole series of breaking gaps 2.
In Fig. 2, 1 designates compressed air containers mounted on pillar insulators 5 which rest upon a base plate 6. In the wall of the containers insulating bushings 7 are inserted which carry operating cylinders 8 for the main breaking gaps 9. 10 is an operating cylinder for auxiliary breaking gaps 11 serving to connect the voltage 2,729,721 Patented Jan. 3, 1956 dependent resistances 4, which are mounted inside insulating bushings 12 inserted in the wall of the container 1. 13 is an outlet valve for the escape of air from the compressed air container, said valve being operated simultaneously with the bridge 14 of the auxiliary breaking gaps 11. The contacts in the main breaking gaps are provided with a boring, so that the air from the container 1 escapes through said boring out through the outlet valve 13. This boring is, however, not shown on the drawing. The resistances 4 in the dilferent bushings are joined with each other by conductors 15 to form a chain connected with the chain of main breaking gaps in the points 16 and 17, the chain of the breaking gaps being connected by conductors 18.
In Fig. 3 a circuit breaker main breakings gaps 9 carried by insulating bushings 7 inserted in the wall of the container 1. In this device the voltage dependent resistances 4, however, are carried by the insulating bushings 7 and are connected with each other by the bridge 14 of the auxiliary breaking gaps 11. The bridge 14 is, as in Fig. 2, operated by the operating cylinder 10 and the main breaking gaps are operated by the operating cylinders 8. As in Fig. 2, the outlet valve 13 is also operated by the operating cylinder 10, and the whole container 1 is carried by the insulator pillar 5 mounted on the base plate 6.
I claim as my invention:
1. An air blast circuit breaker comprising a compressed air container, a plurality of breaking gaps connected in series and enclosed within said container, insulating means serving to support said container, a series of voltage-dependent resistances connected in parallel with only the extreme ends of the series-connected breaking gaps, and auxiliary breaking gaps connected in series with the said resistances and located within the said container.
2. An air blast circuit breaker comprising a plurality of compressed air containers, breaking gaps located in each container and connected with each other in series, insulating means supporting each of said containers, a series of voltage-dependent resistances connected in parallel with only the extreme ends of the series-connected breaking gaps, and auxiliary breaking gaps connected in series with the said resistances and located within said containers.
3. An air blast circuit breaker according to claim 1, comprising insulating bushings inserted in the walls of said container and carrying the stationary contacts of the auxiliary breaking gaps, the said resistances being inserted in said bushings.
4. An air blast circuit breaker according to claim 1, comprising insulating bushings mounted in the walls of the air container and carrying the stationary contacts of the auxiliary breaking gaps, the said resistances being arranged at least partly outside the air container and within the insulating bushings.
5. An air blast circuit breaker according to claim 1,
in which the said resistances are arranged inside the air container.
is shown having only two References Cited in the file of this patent UNITED STATES PATENTS 2,153,400
US342890A 1952-03-19 1953-03-17 High tension circuit breakers Expired - Lifetime US2729721A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE312400X 1952-03-19

Publications (1)

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US2729721A true US2729721A (en) 1956-01-03

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ID=20307651

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US342890A Expired - Lifetime US2729721A (en) 1952-03-19 1953-03-17 High tension circuit breakers

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US (1) US2729721A (en)
CH (1) CH312400A (en)
DE (1) DE1013346B (en)
FR (1) FR1073172A (en)
GB (1) GB724707A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970198A (en) * 1957-02-18 1961-01-31 Westinghouse Electric Corp Compressed-gas circuit interrupter
US3030481A (en) * 1957-12-23 1962-04-17 S & C Electric Co Switch construction
US3114816A (en) * 1960-09-22 1963-12-17 Gen Electric Circuit breaker of gas blast type having insulator bushing means for externally locating an impedance means
US3235695A (en) * 1961-06-26 1966-02-15 Asea Ab Air blast circuit breaker with damping resistor in parallel with the main breaking gap
US4831487A (en) * 1984-11-12 1989-05-16 Bbc Brown, Boveri & Co., Ltd. Reactor switch arc-back limiting circuit
US20120187089A1 (en) * 2008-10-27 2012-07-26 Xuanshu Chen High-voltage, super-voltage and heavy current breaker

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1052500B (en) * 1956-03-19 1959-03-12 Asea Ab High-voltage compressed air switch with several circuit breakers connected in series
CH357780A (en) * 1958-03-08 1961-10-31 Bbc Brown Boveri & Cie Circuit breaker with auxiliary breaking point
US3114815A (en) * 1959-11-18 1963-12-17 Westinghouse Electric Corp Fluid-blast circuit interrupter with improved current-transformer housing means
CH386530A (en) * 1960-09-07 1965-01-15 Asea Ab Compressed air switch with a container which is arranged at high voltage potential and is constantly filled with compressed air
JPS58206019A (en) * 1982-05-27 1983-12-01 株式会社東芝 Breaker

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2153400A (en) * 1936-12-14 1939-04-04 Gen Electric Electrical switch gear
US2292252A (en) * 1938-05-27 1942-08-04 Bbc Brown Boveri & Cie Electrical circuit interrupter
US2453555A (en) * 1943-09-11 1948-11-09 Bbc Brown Boveri & Cie Gas blast circuit breaker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE619689C (en) * 1930-01-30 1935-10-05 Siemens Schuckertwerke Akt Ges Device for interrupting AC circuits
FR1015793A (en) * 1942-07-22 1952-10-23 Delle Atel Const Electr Combined blow-off pneumatic circuit breaker
NL60258C (en) * 1943-09-02

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2153400A (en) * 1936-12-14 1939-04-04 Gen Electric Electrical switch gear
US2292252A (en) * 1938-05-27 1942-08-04 Bbc Brown Boveri & Cie Electrical circuit interrupter
US2453555A (en) * 1943-09-11 1948-11-09 Bbc Brown Boveri & Cie Gas blast circuit breaker

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970198A (en) * 1957-02-18 1961-01-31 Westinghouse Electric Corp Compressed-gas circuit interrupter
US3030481A (en) * 1957-12-23 1962-04-17 S & C Electric Co Switch construction
US3114816A (en) * 1960-09-22 1963-12-17 Gen Electric Circuit breaker of gas blast type having insulator bushing means for externally locating an impedance means
US3235695A (en) * 1961-06-26 1966-02-15 Asea Ab Air blast circuit breaker with damping resistor in parallel with the main breaking gap
US4831487A (en) * 1984-11-12 1989-05-16 Bbc Brown, Boveri & Co., Ltd. Reactor switch arc-back limiting circuit
US20120187089A1 (en) * 2008-10-27 2012-07-26 Xuanshu Chen High-voltage, super-voltage and heavy current breaker

Also Published As

Publication number Publication date
CH312400A (en) 1955-12-31
DE1013346B (en) 1957-08-08
FR1073172A (en) 1954-09-20
GB724707A (en) 1955-02-23

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