US3164705A - Fluid-blast circuit interrupters with retractable impedance probe - Google Patents

Fluid-blast circuit interrupters with retractable impedance probe Download PDF

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Publication number
US3164705A
US3164705A US92677A US9267761A US3164705A US 3164705 A US3164705 A US 3164705A US 92677 A US92677 A US 92677A US 9267761 A US9267761 A US 9267761A US 3164705 A US3164705 A US 3164705A
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US
United States
Prior art keywords
probe
blast
impedance
gas
retractable
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
US92677A
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English (en)
Inventor
Charles F Cromer
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US92677A priority Critical patent/US3164705A/en
Priority to DEW31679A priority patent/DE1192290B/de
Priority to CH215962A priority patent/CH400294A/de
Priority to GB7554/62A priority patent/GB948876A/en
Application granted granted Critical
Publication of US3164705A publication Critical patent/US3164705A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H33/70—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
    • H01H33/82—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 air or gas
    • 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
    • H01H33/167—Impedances connected with contacts the impedance being inserted only while opening the switch

Definitions

  • This invention relates to fluid-blast circuit interrupters in general, and, more particularly, to improved arc-extinguishing structures therefor.
  • a general object of the present invention is toprovide an improved and highly effective arc-extinguishing structure for a fluid-blast circuit interrupter.
  • a more specific object of the present invention is the provision of an improved fluid-blast circuit interrupter utilizing shunting impedance means to modify the recovery-voltage transient.
  • Still a further object of the present invention is to provide an improved fluid-blast circuit-interrupting structure suitable for interrupting circuits having relatively high rates of rise of recovery-voltage transient.
  • a more detailed object of the present invention is to provide an improved fluid-blast arc-extinguishing structure utilizing a retractable fluid-actuated probe to insert a shunting impedance means, such as a resistance, into the circuit during the opening operation thereof.
  • resistors are readily adapted to circuit interrupters to modify severe recovery voltage transients.
  • the number of cycles, or the time, the resistor assembly is subjected to circuit voltage must be kept to a minimum.
  • One method of minimizing this time is to avoid insert of the resistor assembly on the breaker closing stroke.
  • Still a further object of the present invention is the provision of an improved compressed-gas arc-extinguishing unit, in which blast-valve means are utilized to control the blast of gas from a reservoir, or chamber.
  • a gasactuated resistor probe is responsive to opening of the blast valve to shunt a resistor assembly into the circuit on the breaker opening stroke.
  • the gas-actuated resistor probe will, of course, be in its retracted position, thereby avoiding the insertion of the resistor assembly into the breaker circuit during such a closing operation of the interrupter.
  • FIGURE 1 is an end elevational view of a multi-pole high-power circuit interrupter embodying features of the present invention
  • FIG. 2 is a longitudinal sectional view taken through one of the tank structures of the circuit interrupter of FIG. 1, illustrating the internally-disposed arc-extinguish ing assemblage, such assemblage being illustrated in the closed-circuit position;
  • FIG. 3 is a considerably-enlarged substantially vertical sectional view taken through the right-hand circuit-inten rupting unit of the arc-extinguishing assemblage illustrated in FIG. 2, the contact structure being illustrated in the fully closed-circuit position;
  • FIG. 4 is a View somewhat similar to that of FIG. 3, but illustrating the position of the several parts in the partially open-circuit position;
  • FIG. 5 is a diagrammatic view illustrating the relation of the shunting impedance in the novel circuit-interrupting unit of the present invention.
  • FIG. 1 generally designates a three-pole multi-phase double-pressure compressed-gas circuit interrupter.
  • FIG. 1 illustrates an end view of the structure, and consequently only the end tank 2 as shown.
  • a mechanism housing 3 is disposed at the end of the three breaker tanks, and encloses a suitable operating mechanism, not shown, which is effective to simultaneously actuate the arc-extinguishing assemblages 4 (FIG. 2) disposed interiorly of the tank structures 2.
  • each tank structure 2 Extending downwardly interiorly within each one oi the tank structures 2 is a pair of terminal bushings 5, 6, which serve to carry the controlled circuit into the tank 2.
  • the tanks 2 and the mechanism housing 3 are sup ported upon steel beams 7 supported upon a concrete foundation 8.
  • the arc-extinguishing assemblage 4 generally comprises a plurality of serially-related arc-interrupting units 16 of the gas-blast type, the configuration of which is more readily apparent from an inspection of FIG. 3 of the drawings. Disposed adjacent the right-hand end of the arcextinguishing assemblage 4 is a high-pressure storage tank 17. A blast-valve mechanism 18 is operable to control the blasting of gas out of the high-pressure storage tank 17 and toward the three gas-blast interrupting units 16 to effect are extinction thereat.
  • the movable contact assemblage 20 generally comprises a pair of outer longitudinally-extending insulating operating rods 21, which are bridged by cross-bars 22 (FIG. 3) to the middle portions of which are fixedly secured the movable main contacts 23.
  • the rod-shaped movable main contacts 23 make engagement with relatively stationary contact structures 24.
  • the relatively stationary contact structure 24 includes a plurality of circumferentially disposed contact fingers 25 and a somewhat centrally positioned arcing horn 26.
  • an opening accelerating spring 31 biases the movable con tact assemblage 20 toward the left in an opening direction. This movement is resisted by the tension exerted by an operating rod 32 formed of insulating material, and
  • a pair of insulating tie-bars 39 mechanically connect the end clamp castings 14, and serve to fixedly secure into proper position the stationary contact structures 24, associated with each of the gas blast interrupting units 16.
  • the stationary contact structures 24, associated with the middle and left-hand interrupting units 16 contain rightwardly extending relatively stationary contact fingers 49, which serve to guide the adjacently-disposed movable contacts 23, and to carry current therefrom to the adjacent relatively stationary contact structure 24 of the adjacent unit 16.
  • the mechanism disposed interiorly within the mechanism housing 3 is unlatched to permit thereby the crankshaft 43 to rotate in a clockwise direction. Because of the biasing action exerted by the opening accelerating spring 31, the entire movable contact assemblage 20, comprising the plurality of movable contacts 23, interconnected by the insulating tie-bars 21, will move as a unit, toward the left in a circuit-opening direction.
  • the shunting impedance assembly 47 comprises a resistor assembly 48.
  • the resistor assembly 48 could be a helically arranged coil, but, as shown, it comprises a stack of serially-connected spiralb-wound ribbon type resistor elements. Its right-hand end is connected, as at 49, to the relatively stationary main contact structure 24.
  • a gas-actuated retractable resistor probe assembly 50 comprising a probe 51 biased outwardly by a retracting spring 52 and having a piston portion 53 associated therewith.
  • An insulating tube 54 and a tube connector 55 interconnect the region 56 with the lower side of the piston 53.
  • FIG. 5 somewhat diagrammatically illustrates the relationship of the resistance 48 to the relatively stationary and movable contacts 24, 23. It will be apparent that with the novel interrupting structure disclosed, that the resistor assembly 47 is in circuit only during the opening operation, when its presence is required to reduce the rate of rise of the recovery voltage transient. During the closing operation of the interrupter, the resistor assembly 47 is out of the circuit, and consequently is not subjected to heating.
  • an improved gas-blast type of circuitinterrupting unit 16 equipped with a shunting resistor assembly 47.
  • the shunting resistor assembly 47 is connected to the movable main contact 23 by means of one or more retractable resistor probes 50.
  • the probe assemblies 50 consist essentially of a cylindrical probe housing 61, the probe 51, the shunting resistance assembly 48 and the retrieving spring 52.
  • the probe housing 61 is securely fastened to the resistor assembly 47, and tubing 54, 55 interconnects the regions 56 and 62 of the resistor probe.
  • the blast valve 33 When the circuit interrupter 1 is called upon to make an opening operation, the blast valve 33 is operated providing relatively high pressure gas to the volume 56, and gas flows through the interrupting chamber. Pressure also builds up on the face 53 of the probe piston 51 in the housing 61 forcing the probe 51 against the movable contact 23. As the movable contact 23 is withdrawn, an arc is established between the movable contact and the relatively stationary contact assembly. This main arc is then interrupted, and the shunt resistor 48 is inserted into the circuit. As the moving contact 23 is further withdrawn, a low-current arc is drawn between the movable contact 23 and the probe 51, which is readily interrupted at the first current zero. As soon as the blast valve 33 closes, the regions 56, 62 quickly fall to near their original low pressure value and the probe 51 is retrieved to the position illustrated in FIG. 3 by the retracting spring 52.
  • the probe 51 Since the probe 51 is retracted, it will not insert the resistor 48 on the breaker closing stroke, thus reducing the total time the resistor 48 is subjected to voltage.
  • a gas blast circuit interrupter including separable main contacts separable to establish a main current arc, agas blast actuated impedance probe assembly including a retractable probe and a shunting impedance connected therewith, gas blast means for not only effecting extinction of the main current are but also actuation of the probe assembly to insert the impedance in shunt relationship across the main current are, and said retractable probe being out of proximity of the region between the separable main contacts during the closing stroke of the interrupter.
  • a gas blast actuated impedance probe assembly including a retractable probe and a shunting impedance connected therewith, retractable spring means for retracting.
  • the probe upon a cessation of the gas blast, gas blast means for not only etfecting extinction of the main current are but also actuation of the probe assembly to insert the impedance in shunt relationship across the main current arc, and said retractable probe being out of proximity of the region between the separable main contacts during the closing stroke of the interrupter.
  • An interrupting. unit for a gas blast circuit interrupter including an insulating flow director having an opening, a movable tubular contact movable out of said opening during the opening operation, a relatively stationary contact structure disposed on the up-strcam side of the opening and cooperable with the relatively movable tubular contact to draw an arc, a gas blast actuated impedance probe assembly including a retractable probe and a shunting impedance connected therewith, gas blast means fornot only effecting extinction of the main current are but also actuation of the probe assembly to insert the impedancein shunt relationship across the main cur-. rent arc, and said retractable probe being out of proximity of the region between the movable contact and the relativeiy stationary contact structure during the closing stroke of the interrupter.
  • a gas blast circuit interrupter including a separable pair of main contacts separable to establish a main current arc, gas blast means including a blast valve opened during the opening operation for sending an arc-extinguishing blast of gas toward said main currentarc to effect the extinction thereof, impedance means, an impedance probe, said impedance means connected between one of said separable contacts and said impedance probe, means utilizing the pressure of the gas upon opening the blast valve for advancing said impedance probe into close proximity with the other of said separable main contacts,
  • a gas blast circuit interrupter including a separable pair of main contacts separable to establish a main cur rent arc, gas blast means including a blast valve opened during the opening operation for sending an arc-extinguishing blast of gas toward said main current are to effect the extinction thereof, impedance means, an impedance probe, said impedance means connected between one of said separable contacts and said impedance probe, a relatively stationary operating cylinder for housing said impedance probe, conduit means interconnecting said operating cylinder with the down stream side of said blast valve, whereby opening of the blast valve will send a blast; of gas through the conduit means and into the operating cylinder to advance the probe into near proximity with the other of said separable main contacts, and said impedance probe being out of proximity of the region V between the separable main contacts during the closing stroke of the interrupter.
  • gas blastmeans including a blast valve opened during the opening operation for sending an arc extinguishing blast of gas toward said main current are to effect the extinction thereof, impedance means, an impedance probe, said impedance means connected between said relatively stationary contact and said impedance probe, said impedance probe having a piston portion, a relatively stationary operating cylinder for guiding said piston portion, conduit means interconnecting said operating cylinder with the down stream side of said blast valve, whereby opening of the blast valve will send a blast of gas through the conduit means and into the operating cylinder to advance the probe into near proximity with the movabletubular main contact, and said impedance probe being out of proximity of the region between the separable main contacts during the closing stroke of the interrupter.
  • gas blast means including a blast valve opened during the opening operation for sending an arc extinguishing blast of gas toward said current are to effect the extinction thereof, impedance means, an impedance probe, said impedance means connected between said relatively stationary contact and said impedance probe, said impedance probe having a piston portion, a relatively stationary operating cylinder for guiding said piston portion, conduit means interconnecting said operating cylinder with the down stream side of said blast valve, whereby opening of the blast valve will send a blast of gas through the conduit means and into the operating cylinder to advance the probe into near proximity with the movable tubular main contact, spring means for retracting said advanced impedance probe following cessation of the gas blast upon closing of the blastvalve, and said impedance probe being out of proximity of the region between the separable main contacts during the closing stroke of the interrupter.

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  • Circuit Breakers (AREA)
  • Mechanisms For Operating Contacts (AREA)
US92677A 1961-03-01 1961-03-01 Fluid-blast circuit interrupters with retractable impedance probe Expired - Lifetime US3164705A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US92677A US3164705A (en) 1961-03-01 1961-03-01 Fluid-blast circuit interrupters with retractable impedance probe
DEW31679A DE1192290B (de) 1961-03-01 1962-02-14 Druckgasleistungsschalter
CH215962A CH400294A (de) 1961-03-01 1962-02-22 Druckgasschalter
GB7554/62A GB948876A (en) 1961-03-01 1962-02-27 Gas-blast electric circuit interrupters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US92677A US3164705A (en) 1961-03-01 1961-03-01 Fluid-blast circuit interrupters with retractable impedance probe

Publications (1)

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US3164705A true US3164705A (en) 1965-01-05

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US92677A Expired - Lifetime US3164705A (en) 1961-03-01 1961-03-01 Fluid-blast circuit interrupters with retractable impedance probe

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US (1) US3164705A (de)
CH (1) CH400294A (de)
DE (1) DE1192290B (de)
GB (1) GB948876A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3309482A (en) * 1965-11-22 1967-03-14 Westinghouse Electric Corp Recirculating-type gas-blast doublebreak circuit interrupter with filtering housing surrounding intermediate contact
US3333077A (en) * 1964-11-19 1967-07-25 Westinghouse Electric Corp Compressed-gas circuit breaker having contacting interrupting and isolating contactswith sequential operation
US3725623A (en) * 1968-10-28 1973-04-03 Westinghouse Electric Corp Gas-blast downstream-type of high-voltage circuit breaker having field-controlling shields and single venting movable contact
US20100102036A1 (en) * 2008-10-24 2010-04-29 Kabushiki Kaisha Toshiba Gas insulated circuit breaker system and gas insulated circuit breaker monitoring method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840715A (ja) * 1981-09-04 1983-03-09 株式会社東芝 しや断器
JPS58165221A (ja) * 1982-03-25 1983-09-30 三菱電機株式会社 断路器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB546399A (en) * 1940-06-07 1942-07-10 Asea Ab Improvements in electric compressed air blow-out switches
CH267793A (de) * 1945-07-06 1950-04-15 Oerlikon Maschf Druckgasschalter für hohe Ströme.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE596874C (de) * 1928-10-03 1934-05-11 Sigwart Ruppel Dipl Ing Steuerung fuer Schalter mit Lichtbogenloeschung durch stroemendes Druckgas
DE594955C (de) * 1932-02-26 1934-03-24 Aeg Elektrischer Schalter, bei welchem der Lichtbogen durch einen Druckgasstrahl geloescht wird
DE631837C (de) * 1933-12-18 1936-07-01 Const Electr De Delle Sa Atel Elektrischer Schalter mit Lichtbogenloeschung durch ein stroemendes, gasfoermiges oder fluessiges Loeschmittel
DE672960C (de) * 1935-01-31 1939-03-13 Const Electr De Delle Sa Atel Elektrischer Wechselstromschalter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB546399A (en) * 1940-06-07 1942-07-10 Asea Ab Improvements in electric compressed air blow-out switches
CH267793A (de) * 1945-07-06 1950-04-15 Oerlikon Maschf Druckgasschalter für hohe Ströme.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333077A (en) * 1964-11-19 1967-07-25 Westinghouse Electric Corp Compressed-gas circuit breaker having contacting interrupting and isolating contactswith sequential operation
US3309482A (en) * 1965-11-22 1967-03-14 Westinghouse Electric Corp Recirculating-type gas-blast doublebreak circuit interrupter with filtering housing surrounding intermediate contact
US3725623A (en) * 1968-10-28 1973-04-03 Westinghouse Electric Corp Gas-blast downstream-type of high-voltage circuit breaker having field-controlling shields and single venting movable contact
US20100102036A1 (en) * 2008-10-24 2010-04-29 Kabushiki Kaisha Toshiba Gas insulated circuit breaker system and gas insulated circuit breaker monitoring method
US8199445B2 (en) * 2008-10-24 2012-06-12 Kabushiki Kaisha Toshiba Gas insulated circuit breaker system and gas insulated circuit breaker monitoring method

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Publication number Publication date
DE1192290B (de) 1965-05-06
CH400294A (de) 1965-10-15
GB948876A (en) 1964-02-05

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