US3538276A - High-voltage circuit breaker having two-step closing resistance - Google Patents

High-voltage circuit breaker having two-step closing resistance Download PDF

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Publication number
US3538276A
US3538276A US685572A US3538276DA US3538276A US 3538276 A US3538276 A US 3538276A US 685572 A US685572 A US 685572A US 3538276D A US3538276D A US 3538276DA US 3538276 A US3538276 A US 3538276A
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United States
Prior art keywords
resistance
closing
during
resistor
circuit breaker
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Expired - Lifetime
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US685572A
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English (en)
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Winthrop M Leeds
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Westinghouse Electric Corp
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Westinghouse Electric Corp
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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
    • H01H33/16—Impedances connected with contacts
    • H01H33/166—Impedances connected with contacts the impedance being inserted only while closing the switch

Definitions

  • a high-voltage circuit breaker has a two-step closing resistance whereby during the closing or reclosing operation one resistance value is picked up and, by the closing of resistance contacts, a second resistor assembly is put in parallel electrically with the first inserted resistor assembly to thereby reduce the value of inserted resistance.
  • the main contacts are in engagement and both resistor assemblies are shorted out.
  • the resistances have particular valuesin terms of the surge impedance of the line being connected.
  • the construction of the resistor contacts is such that no resistance is inserted during the opening operation of the breaker.
  • the present invention is particularly concerned with a high-voltage circuit breaker in which the individual modules may be modified to include a double step of resistor insertion on the closing or reclosing operation, whereby during the initial portion of the closing stroke one resistance assembly is picked up and inserted electrically into the circuit, and subsequently a second resistance assembly is picked up by resistance contacts and put in parallel electrically with the first resistor assembly.
  • the result is a lower resistance value inserted during the final portion of the closing operation, which effects a further reduction in overvoltages.
  • a high-voltage compressed-gas circuit interrupter of the rotating contact arm type has a two-step resistor assemblage, which is inserted during the closing operation.
  • the arrangement is such that the rotating main contact arms pick up a first step of the resistance during the closing operation. Subsequently, due to resistance-contact closing, a second step of resistance is placed in parallel electrically with the first step so as to reduce the inserted resistance value.
  • the resistances have particular values in terms of the surge impedance of the line.
  • a general object of the present invention is to provide an improved high-voltage circuit breaker which reduces the overvoltages occurring during the closing or reclosing operation of the circuit interrupter.
  • a further object of the present invention is the provision of an improved high-voltage circuit interrupter in which an impedance means, such as a resistor, is inserted by a two-step arrangement only during the closing or reclosing operation of the circuit interrupter to damp the accompanying voltage surges on the line.
  • an impedance means such as a resistor
  • Still a further object of the present invention is the provision of an improved construction arrangement for a two-step resistance assemblage, which is inserted into the circuit only during the closing or reclosing operation, with one step being initially inserted during the closing stroke, whereas the second step is subsequently put in parallel electrically with the first resistance step to reduce thereby the magntiude of the resistance being inserted into the circuit during such a closing operation.
  • FIG. 1 is a side elevational view of a three-phase highvoltage compressed-gas circuit interrupter embodying the principles of the present invention
  • FIG. 2 is a vertical sectional view taken through one of the modular interrupting heads of one of the poleunits of the circuit interrupter of FIG. 1 with the separable contact structure being illustrated in the closedcircuit position;
  • FIG. 3 is an enlarged fragmentary vertical sectional view showing the disposition of the several contact parts in the partially open position.
  • FIG. 4 is a diagrammatic view of the circuit being connected with the two-step resistance assembly diagrammatically indicated.
  • FIG. 1 a side view of one pole of a high-voltage threephase compressed-gas circuit breaker 10 which is comprised of three pole-units A, B and C, although only the end pole-unit A is shown.
  • the pole-units are alike except for the interpole electrical control wiring, gas lines and air lines and for the house on the middle pole, which contains the common parts of the air and gas systems.
  • Each pole unit A, B or C. is mounted upon a heavy grounded sup porting frame 12 comprising longitudinally extending beam members 14 and angularly-braced supports 16.
  • each supporting frame 12 preferably has a longitudinally extending high-pressure main reservoir tank 18 associated therewith, extending in generally parallel relationship, having individual supply pipes 19 (FIG. 2) extending upwardly therefrom into several (in this case three) insulating upstanding hollow column structures 22 to supply high-pressure gas to auxiliary high-pressure reservoir chambers 24 (FIG. 2) at high potential, as more particularly described hereinafter.
  • each pole-unit A, B or C Associated with each pole-unit A, B or C, is an upstanding current transformer assembly or structure 26, which is utilized to measure the current flow through the pole-unit. Since the current transformer structure 26 constitutes no part of the present invention, and the internal structure thereof is well understood by those skilled in the art, it will not be described. Reference may, however, be made to U.S. Pat. 2,504,647 for a description of a typical gas-filled type of current transformer, which could be used.
  • FIG. 1 surmounted upon the insulating hollow column structures 22 are live metallic exhaust housings, or interrupting head units 28 at high potential, interiorly of each of which is a pair of serially-related gas-flow arc-extinguishing units 30, more particularly illustrated in FIGS. 2 and 3 of the drawings.
  • An inspection door 32 pivotally supported upon hinge pins, may be secured by bolts, to form a gas-tight closure for the head unit 28.
  • each interrupting head unit 28 comprises a rotating bridging contact cross-arm assembly, generally designated by the reference numeral 38, and including a pair of radially outwardly extending gas-conducting arms 40 carrying movable contacts 42.
  • Each movable contact 42 separates from a relatively stationary contact structure 44 to establish an arc 46 (FIG. 3), which is extinguished by an intensive double-orifice gas flow, as more fully described hereinafter.
  • the stationary contacts 44 are supported and clamped to terminal studs 48 extending through terminal bushings 50, the latter protruding through the ends of the interrupting head units 28.
  • the circuit-interrupting structure operates, during the opening and closing operations, so as to effect rotation of the several cross-arm assemblies 38 to consequently bring about a closing, or alternatively, an interruption of the electrical circuit L L through the circuit interrupter 10.
  • a blast-valve assembly 34 operates a blast-valve in synchronism with the operating mechanism to permit an outflow of high-pressure gas from the horizontal blast tube 35 and radially outwardly, as illustrated by the arrows 37, and as described in US. Pat. 3,291,947.
  • each of the two terminal bushings 50 extending within the casing 28 are two annular resistor assemblages 51, 52 constituting a two-step resistor arrangement.
  • the construction is such that when the moving contact arm 40 closes, it closes the resistor contacts 53, 54 inserting thereby the outer annular resistor assembly 51.
  • the movable resistor contact 54 puts the inner resistor assemblage 52 in parallel electrically with the outer resistor assemblage 51, thereby reducing the magnitude of the resistance being inserted during the closing operation.
  • both resistor assemblages 51, 52 are shorted out.
  • the time delay associated with the movable pivotal resistor contact 54 is such that it remains in engagement with the inner resistance contact 56 and parts company with the moving resistor contact 53 disposed at the extermity of the rotating main contact arm 40.
  • the resistance 51, 52 is not in the circuit during the opening operation. This leads to high-speed two cycle operation.
  • This invention shows how the SP gas-flow EHV breaker modules 28 might be modified to produce this result by a double step of resistor insertion on closing.
  • Z is the surge impedance of the line being electrically connected.
  • the resistances r of the inner resistance assemblages 52 are substantially equal to the resistance value r of the outer resistance assemblage 51.
  • the paralleling electrically of the two resistance assemblages 51, 52 will half their resistance values so that shortly before the closing of the main contact structures 42, 44 the summation of all of these electrically paralleled resistance assemblies per pole will total a value approximately as follows:
  • an improved high-voltage circuit breaker 10 particularly adaptable for minimizing switching surge overvoltages during the closing operation by being provided with a two-step closing resistance 51, 52 in which the one step 51 is initially inserted during the closing operation, and subsequently the second step 52 is placed in parallel electrically with the first step so as to reduce the closing resistance value to one half a short time before all of the resistance is shorted out by the closing of the main contacts 42, 44.
  • a high-voltage circuit breaker including a pair of separable contacts, means defining a two-step resistance assemblage, contact means interposed in the path of closing travel only of said pair of separable contacts, the arrangement being such that during the closing operation only one of said separable contacts electrically inserts a resistance (r and later inserts the second step of resistance in electrical parallel with the first resistance during such closing operation and finally at the end of the closing operation the said separable contacts make engagement and short out all of the resistances, and means preventing the insertion of said two-step resistance assemblage during the opening operation.
  • a rotating movable contact assembly carries a pair of movable contacts at the outer ends thereof, which engage a pair of spaced stationary contacts, and each pair of separable contacts has the aforesaid resistance arrangement associated therewith.
  • a metal tank has a pair of terminal bushings extending therein, which support the spaced pair of stationary contacts, and the. movable rotating contact assembly is disposed generally centrally of said tank.
  • a high-voltage compressed-gas circuit interrupter including an upstanding hollow insulating column structure, a metallic tank module surmounted on top of said hollow insulating column, a pair of laterally-extending terminal bushings extending laterally into the ends of said tank, the inner ends of said terminal bushings supporting a pair of spaced stationary contacts, a two-step closing resistance assemblage disposed adjacent each stationary contact structure, a rotating movable contact assembly carrying a pair of radially outwardly-extending gas-conducting contact arms carrying movable contacts therewith, resistance contact means associated with each closing resistance assemblage, and the arrangement operating to pick up the two resistance assemblages sequentially during the closing operation, but preventing its insertion during the opening operation for highspeed breaker operation.
  • Z is the surge impedance of the line being electrically connected.

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  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
US685572A 1967-11-24 1967-11-24 High-voltage circuit breaker having two-step closing resistance Expired - Lifetime US3538276A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US68557267A 1967-11-24 1967-11-24

Publications (1)

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US3538276A true US3538276A (en) 1970-11-03

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US685572A Expired - Lifetime US3538276A (en) 1967-11-24 1967-11-24 High-voltage circuit breaker having two-step closing resistance

Country Status (4)

Country Link
US (1) US3538276A (enrdf_load_stackoverflow)
JP (1) JPS4921508B1 (enrdf_load_stackoverflow)
BE (1) BE724124A (enrdf_load_stackoverflow)
GB (1) GB1230829A (enrdf_load_stackoverflow)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676621A (en) * 1971-05-28 1972-07-11 Allis Chalmers Mfg Co High voltage electrical circuit breaker with preinsertion resistor during closing
JPS4911228U (enrdf_load_stackoverflow) * 1972-05-02 1974-01-30
US3836819A (en) * 1973-08-20 1974-09-17 Ite Imperial Corp Current limiting circuit interrupter device
US3863041A (en) * 1973-12-04 1975-01-28 Westinghouse Electric Corp High-voltage circuit-interrupter having a closing resistance and improved shunting-resistance contacts therefor
US4012614A (en) * 1973-12-17 1977-03-15 Westinghouse Electric Corporation High-voltage circuit-interrupter having a closing resistance and improved shunting-resistance contacts therefor
US4072836A (en) * 1974-11-22 1978-02-07 Bbc Brown, Boveri & Company Limited Electrical switch with means for switching an auxiliary resistance into the circuit controlled thereby
US4095069A (en) * 1976-02-23 1978-06-13 Westinghouse Electric Corp. Stainless-steel interrupter-head construction for circuit-interrupters continuously carrying high-value-amperage currents
US4338500A (en) * 1979-03-02 1982-07-06 Societe Anonyme Dite: Delle-Alsthom Device for switching in a resistance when a circuit breaker closes a circuit
FR2503448A2 (fr) * 1981-03-31 1982-10-08 Alsthom Atlantique Disjoncteur a gaz comprime
DE3227466A1 (de) * 1981-09-04 1983-05-26 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa Leistungsschalter
DE3318873A1 (de) * 1982-05-27 1983-12-01 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa Trennschalter mit ueberspannungsunterdrueckung
WO2002103733A1 (en) * 2001-06-18 2002-12-27 Southern States, Inc. Capacitor switch with external resistor and insertion whip
US20050128662A1 (en) * 2003-12-15 2005-06-16 Rostron Joseph R. Capacitor switch with internal retracting impedance contactor
USD529870S1 (en) 2004-05-12 2006-10-10 Mccord Neil Single-phase high voltage capacitor switch
USD531133S1 (en) 2004-05-12 2006-10-31 Mccord Neil High voltage capacitor switch
USD531132S1 (en) 2003-12-15 2006-10-31 Mccord Neil Three-phase capacitor switch
WO2009034022A1 (de) 2007-09-10 2009-03-19 Abb Technology Ag Hochspannungsleistungsschalter mit einem schalter zum zuschalten eines einschaltwiderstandes

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5313306U (enrdf_load_stackoverflow) * 1976-07-17 1978-02-03
JPS5322503U (enrdf_load_stackoverflow) * 1976-08-05 1978-02-25
JPS5343703U (enrdf_load_stackoverflow) * 1977-09-01 1978-04-14
US4443674A (en) * 1982-03-31 1984-04-17 Westinghouse Electric Corp. Circuit interrupter closing resistance mechanism
JP5896532B2 (ja) * 2013-03-28 2016-03-30 Ｎｋｋスイッチズ株式会社 直流電流遮断用小形スイッチの接点機構

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235694A (en) * 1962-11-13 1966-02-15 Ite Circuit Breaker Ltd High voltage double break air switch with damping resistors
US3291947A (en) * 1964-06-12 1966-12-13 Westinghouse Electric Corp Interrupting structures for compressedgas circuit interrupters having double-break hollow rotative moving contact-arm assembly
US3393285A (en) * 1965-12-30 1968-07-16 Allis Chalmers Mfg Co Contact arrangements in oil circuit interrupter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235694A (en) * 1962-11-13 1966-02-15 Ite Circuit Breaker Ltd High voltage double break air switch with damping resistors
US3291947A (en) * 1964-06-12 1966-12-13 Westinghouse Electric Corp Interrupting structures for compressedgas circuit interrupters having double-break hollow rotative moving contact-arm assembly
US3393285A (en) * 1965-12-30 1968-07-16 Allis Chalmers Mfg Co Contact arrangements in oil circuit interrupter

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676621A (en) * 1971-05-28 1972-07-11 Allis Chalmers Mfg Co High voltage electrical circuit breaker with preinsertion resistor during closing
JPS4911228U (enrdf_load_stackoverflow) * 1972-05-02 1974-01-30
US3836819A (en) * 1973-08-20 1974-09-17 Ite Imperial Corp Current limiting circuit interrupter device
US3863041A (en) * 1973-12-04 1975-01-28 Westinghouse Electric Corp High-voltage circuit-interrupter having a closing resistance and improved shunting-resistance contacts therefor
US4012614A (en) * 1973-12-17 1977-03-15 Westinghouse Electric Corporation High-voltage circuit-interrupter having a closing resistance and improved shunting-resistance contacts therefor
US4072836A (en) * 1974-11-22 1978-02-07 Bbc Brown, Boveri & Company Limited Electrical switch with means for switching an auxiliary resistance into the circuit controlled thereby
US4095069A (en) * 1976-02-23 1978-06-13 Westinghouse Electric Corp. Stainless-steel interrupter-head construction for circuit-interrupters continuously carrying high-value-amperage currents
US4338500A (en) * 1979-03-02 1982-07-06 Societe Anonyme Dite: Delle-Alsthom Device for switching in a resistance when a circuit breaker closes a circuit
FR2503448A2 (fr) * 1981-03-31 1982-10-08 Alsthom Atlantique Disjoncteur a gaz comprime
DE3227466A1 (de) * 1981-09-04 1983-05-26 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa Leistungsschalter
US4434333A (en) 1981-09-04 1984-02-28 Tokyo Shibaura Denki Kabushiki Kaisha Circuit breaker device
DE3318873A1 (de) * 1982-05-27 1983-12-01 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa Trennschalter mit ueberspannungsunterdrueckung
WO2002103733A1 (en) * 2001-06-18 2002-12-27 Southern States, Inc. Capacitor switch with external resistor and insertion whip
US6597549B2 (en) 2001-06-18 2003-07-22 Southern States Llc Capacitor switch with external resistor and insertion whip
USD531132S1 (en) 2003-12-15 2006-10-31 Mccord Neil Three-phase capacitor switch
US20050128662A1 (en) * 2003-12-15 2005-06-16 Rostron Joseph R. Capacitor switch with internal retracting impedance contactor
US7078643B2 (en) 2003-12-15 2006-07-18 Rostron Joseph R Capacitor switch with internal retracting impedance contactor
USD532752S1 (en) 2003-12-15 2006-11-28 Mccord Neil Single-phase capacitor switch
USD529870S1 (en) 2004-05-12 2006-10-10 Mccord Neil Single-phase high voltage capacitor switch
USD531133S1 (en) 2004-05-12 2006-10-31 Mccord Neil High voltage capacitor switch
WO2009034022A1 (de) 2007-09-10 2009-03-19 Abb Technology Ag Hochspannungsleistungsschalter mit einem schalter zum zuschalten eines einschaltwiderstandes
US20100219163A1 (en) * 2007-09-10 2010-09-02 Abb Technology Ag High-voltage circuit breaker having a switch for connection of a closing resistor
CN101855694A (zh) * 2007-09-10 2010-10-06 Abb技术有限公司 具有用于接入合闸电阻的开关的高压功率开关
US8426760B2 (en) 2007-09-10 2013-04-23 Abb Technology Ag High-voltage circuit breaker having a switch for connection of a closing resistor
CN101855694B (zh) * 2007-09-10 2014-04-23 Abb技术有限公司 具有用于接入合闸电阻的开关的高压功率开关
KR101503955B1 (ko) 2007-09-10 2015-03-18 에이비비 테크놀로지 아게 시작 저항기와 맞물리기 위한 스위치를 갖는 고전압 전력 스위치

Also Published As

Publication number Publication date
JPS4921508B1 (enrdf_load_stackoverflow) 1974-06-01
GB1230829A (enrdf_load_stackoverflow) 1971-05-05
BE724124A (enrdf_load_stackoverflow) 1969-05-19

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