US3448287A - Electrical switching arrangement with multiple interruption - Google Patents

Electrical switching arrangement with multiple interruption Download PDF

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Publication number
US3448287A
US3448287A US574454A US3448287DA US3448287A US 3448287 A US3448287 A US 3448287A US 574454 A US574454 A US 574454A US 3448287D A US3448287D A US 3448287DA US 3448287 A US3448287 A US 3448287A
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United States
Prior art keywords
switching
points
main
switching points
auxiliary
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
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US574454A
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English (en)
Inventor
Salvatore Giammona
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.)
BBC Brown Boveri AG Germany
BBC Brown Boveri France SA
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BBC Brown Boveri France SA
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Application filed by BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
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Publication of US3448287A publication Critical patent/US3448287A/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
    • H01H33/16—Impedances connected with contacts
    • H01H33/168—Impedances connected with contacts the impedance being inserted both while closing and while opening the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/40—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/42—Impedances connected with contacts

Definitions

  • Each main switching point formed by a pair of switch contacts is bridged by a series circuit arrangement of a resistor and an auxiliary switching point established also by a pair of auxiliary switch contacts.
  • the operating sequence is such that when switching off, all of the main switching points disconnect simultaneously and all of the auxiliary switching points also disconnect simultaneously but with a delayed action so as to follow disconnection of the main switching points.
  • a first group of the main switching points close simultaneously, and all of the auxiliary switching points also close simultaneously and at the same time as the main switching points of the first group. The remaining main switching points then close simultaneously but with a delayed action after the first group.
  • the present invention relates to an electrical switching arrangement and more particularly to an improvement on a type of switch which provides so-called multiple interruption, i.e., a plurality of main, power switching points are connected electrically in series, and each main switching point, formed by a pair of relatively movable contact members, is paralleled, i.e., bridged by a series circuit arrangement of a resistor and an auxiliary switching point.
  • multiple interruption i.e., a plurality of main, power switching points are connected electrically in series
  • each main switching point formed by a pair of relatively movable contact members
  • auxiliary switching point i.e., bridged by a series circuit arrangement of a resistor and an auxiliary switching point.
  • the period of time that the resistance is under load during a switching-on operation is shorter than the load period during a switching-oft operation so that use of the same resistance element for both functions leads to an unfavorable resistancedesign because it has to be dimensioned, from a standpoint of its current load carrying ability for the less favorable function of switching-off.
  • the object of the present invention is to overcome this difiiculty and has for its principal aim to enable the switch to perform a switching-on operation, without the use of additional resistances and auxiliary switching points, with a resistance whose ohmic value is substantially lower than the value used during a switching-01f operation.
  • This objective is attained by the use of a single set of resistances and auxiliary switching points but wherein the operating instants of the main switching points are so controlled that during a switching-on operation, only a first group of the total number of main switching points are closed simultaneously while the remaining main switching points are thereafter closed simultaneously but with a delayed action in relation to closure of the first group. All of the auxiliary switching points are closed simultaneously and at the same time as closure of the first group of main switching points takes place. When switching-off, all main switching points open simultaneously and all auxiliary switching points also open simultaneously but with a delayed action in relation to opening of the main switching points.
  • the power switching device is seen to be comprised of a plurality of power switching points 1a to lg which are connected electrically in series to a line L to be controlled. Connected in parallel with each of these power switching points is a series arrangement of a resistance and an auxiliary switching point for connecting the resistance into and out of its parallel circuit arrangement with the power switching point.
  • These resistances are designated by 2a2g and their respective auxiliary switching points by 3a-3g.
  • Each of these auxiliary switching points has its own actuating mechanism or drive and these are designated by 4a-4g.
  • a suitable construction for such a drive and illustrating the arrangement of the contacts 3a-3g and resistances 2a-2g is described in US. Patent No. 2,665,351, issued Jan. 5, 1954, in the name of Ha-akon Forwald.
  • One group of the power switching points 1a, 1b and 1c are actuated together by a common drive mechanism 5, and the remaining switching points 1d, 1e, 1f and 1g are likewise actuated together by a common drive mechanism 6.
  • a suitable construction for such a drive and illustrating the arrangement of the contacts 1a to 10 and 1d to lg as well as the drives 5 and 6 is likewise illustrated in the aforesaid Patent No. 2,666,351.
  • an Off control apparatus 7 is employed for switching otf the power switching points and for switching off the auxiliary switching points and this is used to control the drive mechanisms 5 and 6 jointly so that the power switching points 1a1g open simultaneously.
  • the Off control apparatus 7 is also used to control the drive mechanisms '4a4g jointly so that the latter open their respectively controlled auxiliary switching points 3a-3g simultaneously but a time delay unit '8 is interposed between the control 7 and drive mechanisms 4a-4g so that the auxiliary switching points 3a-3g open after the main power switching points la-lg have opened.
  • an 011 control 10 When a switching-on operation is desired, an 011 control 10 is utilized and this actuates drive methanism 6 for the power switching points 1d-1g directly, i.e., without any delay.
  • the On control also actuates drive mechanism for the power switching points la-lc but a delay unit 9 is interposed between the On control and drive 5 so that the main power switching points la-lc close somewhat later than do the power switching points ld-lg.
  • the On control is also used to actuate all ot the drives 4a-4g for the auxiliary switching points 3a-3g simultaneously to their closed positions and at the same time that the power switching points ld-lg are closed.
  • a suitable construct-ion for the delay units 8 and 9 is described in Swiss Patent No. 343,484, published Feb. 15, 1960, and a suitable construction for the Control Off and Control On units 7 and 10- is described in British Patent No. 980,247, published Jan. 13, 1965.
  • the advantage derived from this improved arrangement is that by closing the power switching points in two stages, i.e., in two groups, one group being delayed, a portion of the switching-off resistances, namely 2a-2c become effective as switching-on resistances because the main switching points la-lc which close with the delay action, force a current path via the resistances 2a-2c and because the auxiliary switching points 3a-3g have already closed simultaneously with closure of the other group of main switching points ld-lg.
  • an electrical switching device comprising a plurality of main power interrupt-ing points arranged in first and second groups and which are connected electrically in series, each of said groups including a plurality of series connected sets of main switching contacts, a resistance and an auxiliary interrupting point constituted by a set of auxiliary switching contacts arranged in a series circuit with said resistance and which circuit is connected in parallel with each of said sets of main switching contacts, first and second drive means for actuating simultaneously the sets of main switching contacts of said first and second groups, respectively, a third drive means for actuating simultaneously all of the sets of auxiliary switching contacts, a switching-off control means for actuating all of said drive means, said first and second drive means being actuated directly by said switching-off control means to effect immediate and simultaneous action of all of said sets of main switching contacts from closed to open position, and said third drive means being actuated indirectly by said switchingotf control means through a first delay unit thereby to elfect simultaneous but delayed actuation of all of said sets of auxiliary switching contacts from closed to open

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US574454A 1965-09-29 1966-08-23 Electrical switching arrangement with multiple interruption Expired - Lifetime US3448287A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1344965A CH424916A (de) 1965-09-29 1965-09-29 Einrichtung bei elektrischen Schaltern mit Mehrfachunterbrechung

Publications (1)

Publication Number Publication Date
US3448287A true US3448287A (en) 1969-06-03

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ID=4392562

Family Applications (1)

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US574454A Expired - Lifetime US3448287A (en) 1965-09-29 1966-08-23 Electrical switching arrangement with multiple interruption

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US (1) US3448287A (de)
CH (1) CH424916A (de)
DE (1) DE1227536B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530306A (en) * 1969-04-11 1970-09-22 Gen Electric Dishwasher control circuit
US3641358A (en) * 1970-06-10 1972-02-08 Hughes Aircraft Co Consecutive crowbar circuit breaker
US3670176A (en) * 1970-04-10 1972-06-13 Werner Faust Switching arrangement for disconnecting high voltage direct current lines
US20010039626A1 (en) * 2000-05-08 2001-11-08 Joachim Jauert Configuration for identifying a switch position of a power switch
WO2002056326A1 (en) * 2001-01-11 2002-07-18 Abb Ab An electric device, a current limiter and an electric power network
EP1626421A1 (de) * 2003-05-20 2006-02-15 Fujitsu Limited Elektrische kontakteinrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3038347A1 (de) * 1980-10-10 1982-05-27 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Hochspannungs-leistungsschalter
JPS5774917A (en) * 1980-10-25 1982-05-11 Tokyo Shibaura Electric Co Breaker with parallel resistor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US3192440A (en) * 1960-09-16 1965-06-29 Bbc Brown Boveri & Cie Load switch with parallel connected capacitors
US3284648A (en) * 1960-12-08 1966-11-08 Licentia Gmbh Switching circuit
US3366837A (en) * 1963-08-29 1968-01-30 Philips Corp Surge suppression apparatus for polyphase high voltage system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192440A (en) * 1960-09-16 1965-06-29 Bbc Brown Boveri & Cie Load switch with parallel connected capacitors
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
US3284648A (en) * 1960-12-08 1966-11-08 Licentia Gmbh Switching circuit
US3366837A (en) * 1963-08-29 1968-01-30 Philips Corp Surge suppression apparatus for polyphase high voltage system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530306A (en) * 1969-04-11 1970-09-22 Gen Electric Dishwasher control circuit
US3670176A (en) * 1970-04-10 1972-06-13 Werner Faust Switching arrangement for disconnecting high voltage direct current lines
US3641358A (en) * 1970-06-10 1972-02-08 Hughes Aircraft Co Consecutive crowbar circuit breaker
US20010039626A1 (en) * 2000-05-08 2001-11-08 Joachim Jauert Configuration for identifying a switch position of a power switch
EP1156405A3 (de) * 2000-05-08 2004-11-03 Francotyp-Postalia AG & Co. KG Anordnung zur Erkennung der Schaltstellung eines Netzschalters
US6880092B2 (en) 2000-05-08 2005-04-12 Francotyp-Postalia Ag & Co. Kg Configuration for identifying a switch position of a power switch
WO2002056326A1 (en) * 2001-01-11 2002-07-18 Abb Ab An electric device, a current limiter and an electric power network
US20040245857A1 (en) * 2001-01-11 2004-12-09 Lars Liljestrand Electric device, a current limiter and an electric power network
US7235751B2 (en) 2001-01-11 2007-06-26 Abb Ab Electric device, a current limiter and an electric power network
EP1626421A1 (de) * 2003-05-20 2006-02-15 Fujitsu Limited Elektrische kontakteinrichtung
EP1626421A4 (de) * 2003-05-20 2009-02-11 Fujitsu Ltd Elektrische kontakteinrichtung

Also Published As

Publication number Publication date
DE1227536B (de) 1966-10-27
CH424916A (de) 1966-11-30

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