US2596254A - Compressed air switch with delayed break connector - Google Patents

Compressed air switch with delayed break connector Download PDF

Info

Publication number
US2596254A
US2596254A US723728A US72372847A US2596254A US 2596254 A US2596254 A US 2596254A US 723728 A US723728 A US 723728A US 72372847 A US72372847 A US 72372847A US 2596254 A US2596254 A US 2596254A
Authority
US
United States
Prior art keywords
contact
contacts
conduit
arc
electrodes
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
US723728A
Other languages
English (en)
Inventor
Latour Andre
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US2596254A publication Critical patent/US2596254A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • the present invention relates to a circuit breaker, and more particularly to a circuit breaker of the gas blast type.
  • circuit breakers of the kind described it has been suggested to connect temporarily a resistor across the main contacts, the resistor forming part of an electric circuit containing two electrodes separated by a gap.
  • the known circuit breakers of this kind have the drawback that the resistor is connected in shunt to the main contacts either too late or too early for an efficient extinction of the arc between the main contacts.
  • the present invention consists in a circuit breaker of the gas blast type comprising in ccmbination, a first contact, a second contact arranged movably with respect to the rst contact and being adapted to make contact with the same in one end position thereof, means for directing a gas blast through the arc formed between the contacts upon separation thereof, an electric circuit connected in parallel to the contacts and including in series connection a resistor and two electrodes separated by an arc gap located outside the path of the gas blast acting on the arc between the contacts, and means arranged downstream relating to the first and second contacts for directing a part of the gas blast to the arc gap separating the electrodes, whereby an arc is started and extinguished, respectively. between the electrodes with a time delay being independent of the main flow of the gas blast.
  • Fig. 1 is a sectional elevation of a first embodiment of the present invention
  • Fig. 2 is a sectional part elevation of a modication of the embodiment shown in Fig. 1;
  • Fig. 3 is a sectional elevation of another embodiment of the present invention.
  • Fig. 4 is a sectional elevation of the upper part of Fig. 3 on an enlarged scale, showing a slight modification of Fig. 3;
  • Fig. 5 is a partial sectional elevation of another embodimentof the present invention.
  • Fig. 6 is a partial sectional elevation of a still further embodiment of the present invention.
  • the circuit breaker has a stationary rst contact I and a movable second contact 2 which are both designed as hollow tubes and are shown in Figure 1 in the open position thereof.
  • the stationary contact I and the lower part of the movable contact 2 are disposed inside an insulating casing 3 provided with means (not shown) for introducing compressed air at the moment when the contact between the contacts I and 2 is to be broken.
  • the stationary contact I is centered in the casing 3 by means of center pieces such as wings 43.
  • the casing 3 is closed at the top by a metallic body 5 which serves as a guiding member for the movable Contact 2 and supports a terminal 3
  • a helical spring 4 is arranged between the terminal 3
  • the stationary contact I is connected through swinging contacts 'I to a tubular contact member 6 serving as the other terminal of the circuit breaker.
  • the contact members 1 are sliding on the tubular contact member 6 which serves as part of a disconnecting switch interrupting the current connection to the circuit breaker.
  • An electric circuit is connected in parallel to the contacts I and 2 and includes in series connection a resistor 8 and two stationary electrodes 9 and I0 separated by an arc gap located outside the path of the gas blast acting on the arc between the contacts I and 2.
  • the electrode 9 is arranged inside an insulating casing II having an oriiice I2 being coaxial with the electrodes 9 and I0.
  • the casing II communicates through a conduit I3 with the hollow I4 of the stationary contact I.
  • the electrode I0 is surrounded by an insulating casing I5 leading the ionized gases from the gap between the electrodes 9 and I0 to a cooling device IB comprising parallel blades separated from one another by short distances.
  • the contacts I and 2 are in contact with each other.
  • the movable contact 2 is moved away from the stationary contact I and an arc is started between the contacts I and 2 which is driven by the gas blast set up in the casing 3 into the hollow interior of the contacts I and 2 through which the compressed air escapes.
  • the interior of these contacts, and especially the discharge channel I4 is traversed by a blast of highly ionized hot gases coming from the arc. From this blast the conduit I3 which is arranged downstream relatively to the contacts I and 2, leads a certain quantity of ionised gas whichn forms a current path between the electrodes Si and I so that'the auxiliary arc strikes.
  • the resistor 8 is thus branched in parallel to the contacts I and 2.
  • a certain quanty of conducting gas remains in the conduit I3 which has not had time to escape through the tone I2.
  • the resistor 3 therefore, remains shunted between the contacts I and 2 at the moment when the Voltage attempts to re-establish itself between the contacts I and 2 which are thus well protected against any rapid rise in voltage. It is therefore only with a certain lag that the conducting gases contained in the conduit i3 are discharged and replaced by the pure and insulatcompressed air.
  • the ionised gas can be taken from a vsource situated down stream of the hollow contact.
  • Fig. 3 where E indicates the stationary hollow Contact provided with spark arresters il, iii, and 2" indicates the movable rod-like Contact. The latter is connected to the resistor through the intermediary of a sliding contact I t.
  • the ionised gases are collected by means of a collector which opens the conduit i3 feeding the electrode s". If it is desired to obtain a certain pressure the entry oriiice 2l of the collector 23 can be made larger than the outlet tone 22 the collector 2G.
  • the electrode 8 is arranged in an insulating casing and opposite to the electrode Ill" connected to the resistor il.
  • the ionised gas inlet 2i) can also be arranged as in the modified construction shown in Fig. 1.- comprising a bell-shaped collector 2Q open at the bottom and into the interior of which the conduit I3 penetrates. The latter is closed at its lower part by a plug 23 and a plurality of holes 24 allo-sY the penetration of gas into the conduit I3. Holes 25 are provided at the upper part of the bell-shaped collector 2b to allow the circulation of gas into the annular space between the bell-shaped collector ZEE and the conduit IS". By this arrangement particles from the contacts or the spark arresters are prevented from entering conduit I3".
  • a device of this kind is shown in Fig. in which the fresh gas is taken from the interior of the casing 3 through a pipe 26 traversing the contact IIV and led through a tube 21 of material permeable to the ionising radiations (quartz for example) which tube is disposed in the eld of the said radiations.
  • 'Ihis tube communicates with a conduit 131V connected to one of the electrodes of the auxiliary arc gap (not shown).
  • FIG. 6 shows a rod-like contact provided with an end point 2B of refractory material (tungsten, carbon or any special composltion).
  • refractory material tungsten, carbon or any special composltion
  • the conduit 2 can comprise a closed end 3D serving as trap for metal particles or other impurities.
  • the other parts, such as the insulating casing IIV provided with the orifice l2V and the other electrode IBV connected to the resistor 8V operate in the same manner as the corresponding parts in the other embodiments.
  • any appropriate impedance and particularly a condenser, a condenser shunted by a resistance, an electrolytic or electro-chemical condenser, a resistance varying with voltage, a fuse with automatic regeneration and so on may replace the resistor 8.
  • auxiliary arc gap may be placed outside the switch. This last arrangement has the advantage of facilitating the maintenance of the circuit oreal-:er and of allowing a particularly easy control of the operation thereof.
  • a circuit breaker of the gas blast type comprising in combination, a rst contact; a second contact arranged movably with respect to said first contact and being adapted to make contact with the same in one end position thereof; means for directing a gas blast through the arc formed between said contacts upon separation thereof an electric circuit connected in parallel to said contacts and including in series connection a resistance and two electrodes separated by an arc gap located outside the path of the gas blast acting on the arc between said contacts; and means for directing a part of the 'gas blast to the arc gap separating said electrodes, said means including a conduit and an exit orifice of said conduit having a cross-sectional area appreciably smaller' than the cross-sectional area of said conduit, whereby an arc is started between said' electrodes with a time delay being independent of the main flow of the gas blast.
  • a circuit breaker of the gas blast type comprising in combination, a first stationary contact; a second contact arranged movably with respect to said rst stationary contact and being adapted to make contact with the same in one end position thereof; means for directing a gas blast through the arc formed between said contacts upon separation thereof; an electric circuit connected in parallel to said contacts and including in series connection a resistance and two stationary electrodes separated by an arc gap located outside the path of the gas blast acting on the arc between said contacts; and means or directing a part of the gas blast to the arc gap separating said stationary electrodes, said means including a conduit and an exit orince of said conduit having a cross-sectional area appreciably smaller than the cross-sectional area of said conduit, whereby an are is started between said electrodes with a time delay being independent of the main flow of the gas blast.
  • a circuit breaker of the gas blast type comprising in combination, a first Contact; a second contact arranged movably with respect to said iirst contact and being adapted to make Contact with the same in one end position thereof; means for directing a gas blast through the are formed between said contacts upon separation thereof; an electric circuit connected in parallel to said contacts and including in series connection a resistance and two electrodes separated by an arc gap located outside the path of the gas blast acting on the arc between sai-d contacts; and means for directing a part of the gas blast to the arc gap separating said electrodes, said means including a conduit, a gas-collecting device arranged at the entry of said conduit and an exit orifice of said conduit having a cross-sectional area appreciably smaller than the cross-sectional area of said conduit, whereby an arc is started between said electrodes with a time delay being independent of the main iiow of the gas blast.
  • a circuit breaker of the gas blast type comprising in combination, a rst contact; a second contact arranged movably with respect to said first contact and being adapted to make contact with the same in one position thereof; means for directing a gas blast through the arc formed between said contacts upon separation thereof; an electric circuit connected in parallel to said contacts and including in series connection a resistance and two electrodes separated by an arc gap located outside the path of the gas blast acting on the arc between said contacts; and means for directing a part of the gas blast to the arc gap separating said electrodes; said means including a conduit, a gas-collecting device arranged at the entry of said conduit and having an additional outlet tone other than the entry opening of said conduit and an exit tone of said conduit having a cross-sectional area appreciably smaller than the cross-sectional area of said conduit, whereby an arc is started between said electrodes with a time delay being independent of the main flow of the gas blast.
  • a circuit breaker of the gas blast type comprising in combination, a rst contact; a second contact arranged movably with respect to said rst contact and being adapted to make contact with the same in one end position thereof; means for directing a gas blast through the arc formed between said contacts upon separation thereof; an electric circuit connected in parallel to said contacts and including in series connection a resistance and two electrodes separated by an arc gap located outside the path of the gas blast acting on the arc between said contacts; and means for directing a part of the gas blast to the arc gap separating said electrodes, said means including a conduit, a gas-collecting device arranged at the entry of said conduit and an exit orifice of said conduit having a cross-sectional area appreciably smaller than the cross-sectional area of said conduit, said conduit having a sealed end arranged inside said gas-collecting device and holes provided in the conduit wall near said sealed end, whereby an arc is started between said electrodes with a time delay being independent or the main ow of the gas blast.
  • a circuit breaker of the gas blast type comprising in combination, a iirst contact; a second contact arranged movably with respect to said rst contact and being adapted to make contact with the same in one end position thereof; means for directing a gas blast through the arc formed between said contacts upon separation thereof; an electric circuit connected in parallel to said contacts and including in series connection a resistance and two electrodes separated by an arc gap located outside the path of the gas blast acting on the arc between said contacts; and means for directing a part of the gas blast to the arc gap separating said electrodes, said means including a conduit and an exit tone of said cono duit having a cross-sectional area appreciably smaller than the cross-sectional area of said conduit, said conduit including a portion consisting of a material permeable to ionizing radiation and arranged in the path of the radiation of the arc formed between said contacts, whereby an arc is started between said electrodes with a time delay being independent of the main flow of the gas blast.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Circuit Breakers (AREA)
US723728A 1945-03-08 1947-01-23 Compressed air switch with delayed break connector Expired - Lifetime US2596254A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR884525X 1945-03-08

Publications (1)

Publication Number Publication Date
US2596254A true US2596254A (en) 1952-05-13

Family

ID=9374992

Family Applications (1)

Application Number Title Priority Date Filing Date
US723728A Expired - Lifetime US2596254A (en) 1945-03-08 1947-01-23 Compressed air switch with delayed break connector

Country Status (4)

Country Link
US (1) US2596254A (fr)
DE (1) DE884525C (fr)
FR (1) FR912902A (fr)
GB (1) GB616031A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2794886A (en) * 1954-03-02 1957-06-04 British Thomson Houston Co Ltd Electric circuit breakers of the air or gas-blast type
US2833896A (en) * 1954-11-24 1958-05-06 British Thomson Houston Co Ltd Electric circuit breakers of the air or gas-blast type
CN112041960A (zh) * 2018-04-18 2020-12-04 西门子股份公司 具有合闸电阻装置的高压功率开关

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1261930B (de) * 1961-03-23 1968-02-29 Liebknecht Transformat Hochspannungsdruckgasschalter
NL294811A (fr) * 1962-07-02

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB538672A (en) * 1939-03-30 1941-08-12 Asea Ab Compressed air circuit breaker having a resistance bridging the contacts
US2275872A (en) * 1939-06-27 1942-03-10 Gen Electric Gas blast electric circuit breaker
US2349095A (en) * 1942-01-17 1944-05-16 Vickers Electrical Co Ltd Electric circuit breaker
US2367934A (en) * 1942-07-30 1945-01-23 Vickers Electrical Co Ltd Fluid blast circuit breaker
US2391826A (en) * 1942-07-30 1945-12-25 Vickers Electrical Co Ltd Fluid blast circuit breaker
US2441943A (en) * 1943-01-18 1948-05-18 Bbc Brown Boveri & Cie Gas blast circuit breaker
US2453555A (en) * 1943-09-11 1948-11-09 Bbc Brown Boveri & Cie Gas blast circuit breaker

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB538672A (en) * 1939-03-30 1941-08-12 Asea Ab Compressed air circuit breaker having a resistance bridging the contacts
US2275872A (en) * 1939-06-27 1942-03-10 Gen Electric Gas blast electric circuit breaker
US2349095A (en) * 1942-01-17 1944-05-16 Vickers Electrical Co Ltd Electric circuit breaker
US2367934A (en) * 1942-07-30 1945-01-23 Vickers Electrical Co Ltd Fluid blast circuit breaker
US2391826A (en) * 1942-07-30 1945-12-25 Vickers Electrical Co Ltd Fluid blast circuit breaker
US2441943A (en) * 1943-01-18 1948-05-18 Bbc Brown Boveri & Cie Gas blast circuit breaker
US2453555A (en) * 1943-09-11 1948-11-09 Bbc Brown Boveri & Cie Gas blast circuit breaker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2794886A (en) * 1954-03-02 1957-06-04 British Thomson Houston Co Ltd Electric circuit breakers of the air or gas-blast type
US2833896A (en) * 1954-11-24 1958-05-06 British Thomson Houston Co Ltd Electric circuit breakers of the air or gas-blast type
CN112041960A (zh) * 2018-04-18 2020-12-04 西门子股份公司 具有合闸电阻装置的高压功率开关
US11587748B2 (en) 2018-04-18 2023-02-21 Siemens Energy Global GmbH & Co. KG High-voltage power switch with closing resistor arrangement

Also Published As

Publication number Publication date
DE884525C (de) 1953-07-27
GB616031A (en) 1949-01-14
FR912902A (fr) 1946-08-23

Similar Documents

Publication Publication Date Title
US1928470A (en) Electric circuit breaker
US2243040A (en) Circuit interrupter
US2596254A (en) Compressed air switch with delayed break connector
US2060282A (en) Electric circuit breaker with compressed gas blow-out
US4737607A (en) Electrical circuit breaker with self-expansion and rotating arc
GB1116699A (en) Improvements in circuit interrupting means for a high voltage d-c circuit
US2469459A (en) Gas blast circuit breaker
USRE22298E (en) Gas blast circuit breaker
US2302592A (en) Alternating current electric circuit breaker of the gas blast type
US4381436A (en) Rotary arc type circuit breaker
US2196820A (en) Arrangement for extinguishing electric arcs
US2240233A (en) Gas blast circuit breaker
GB826463A (en) Improvements in electric circuit breakers of the air- or gas-blast type
US3688155A (en) Reigniting spark gap device including a flow-through channel
US2349095A (en) Electric circuit breaker
US2486127A (en) Air blast electric circuit breaker
US1898900A (en) Method and apparatus for interrupting high tension circuits
US3500009A (en) High voltage circuit breaker with means for preinserting resistors during closing
US2365134A (en) Electric circuit breaker of the gas-blast type
US2391826A (en) Fluid blast circuit breaker
GB733782A (en) Improvements in or relating to liquid blast circuit breakers
US2290708A (en) Gas blast circuit breaker
US2570610A (en) Gas blast circuit breaker with trap for products of arcing
US2426250A (en) Gas blast circuit breaker
GB542728A (en) Improvements in or relating to a.c. electric circuit-breakers of the gas-blast type