US3475574A - Power switch including opposed diodes in circuit with switch contacts - Google Patents

Power switch including opposed diodes in circuit with switch contacts Download PDF

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Publication number
US3475574A
US3475574A US628674A US62867467A US3475574A US 3475574 A US3475574 A US 3475574A US 628674 A US628674 A US 628674A US 62867467 A US62867467 A US 62867467A US 3475574 A US3475574 A US 3475574A
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United States
Prior art keywords
auxiliary electrode
switch
diode
diodes
current
Prior art date
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Expired - Lifetime
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US628674A
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English (en)
Inventor
Walter Stolarz
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
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Bbc Brown Boveri & Cie
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Application filed by Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
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Publication of US3475574A publication Critical patent/US3475574A/en
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    • 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
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • 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
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
    • 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
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/541—Contacts shunted by semiconductor devices

Definitions

  • An electrical power switch for interrupting alternating currents includes a pair of contact members one of which Is stationary and the other movable. At least one auxiliary electrode is arranged perpendicularly to and adjacent the disconnecting path between the contact members and the distance between the auxiliary electrode and the contact members is smaller than the length of the disconnecting path between the contact members when fully disconnected. Diode circuits each including at least one diode extend respectively between each contact member and the auxiliary electrode and these diodes are connected in opposition. Means are also provided for blasting the are drawn between the contact members upon disconnection. The diode circuits in conjunction with the auxiliary electrode and blasting serve to divert the are away from the main contact members by transferring its ends to the auxiliary electrode and movable contact member so that it is quenched more quickly.
  • the present invention relates to a power switch with oppositely directed diode circuits, each consisting of at least one diode, to facilitate the disconnection of alternating currents in each current direction, and with auxiliary electrodes to which the arc is commutated during the disconnection, as well as with blasting of the arc.
  • diodes in connection with power switches for alternating current to quench the arc and thus to facilitate the disconnection, is already known from the German Patent No. 638,981.
  • two contacts are provided to each of which is assigned a diode with a different conducting direction.
  • auxiliary electrodes to which the arc is commutated by blowing with compessed gas.
  • the auxiliary electrodes are connected in series with diodes so that the arc can quench after commutation.
  • the auxiliary electrode is arranged here inside the nozzle contact. The arc, which burns at first between the main contacts, is commutated to the auxiliary electrode by blasting when the current is just in the conducting direction of the diode.
  • the diodes between the main contact members of the switch and at least one auxiliary electrode, and to locate the one or more auxiliary electrodes perpendicularly to the contact path of the main contacts, and to make the distance from the auxiliary electrode to the main contact members smaller than the length of the disconnecting path between the main contact members when fully disconnected and to blast the arc in a transverse direction.
  • FIG. 1 is a schematic representation of an electrical switch incorporating one embodiment of the invention, and with the switch contacts shown in closed position;
  • FIG. 2 is a schematic view similar to FIG. 1 but showing the switch contacts in open position
  • FIG. 3 is a view in side elevation of the details of the electrical switch as portrayed schematically in FIGS. 1 and 2;
  • FIG. 4 is a schematic representation of another embodiment of the invention and with the switch contacts shown in closed position;
  • FIG. 5 is a view similar to FIG. 4 but with the switch contacts shown in open position;
  • FIG. 6 is a view in side elevation of the details of the electrical switch portrayed in FIGS. 4 and 5;
  • FIG. 7 is a schematic representation of still another embodiment of the invention constituting a variant of the construction shown in FIGS. 4-6.
  • the stationary contact member of the power switch is designated by numeral 2, and the movable contact member, which can move towards the right, is designated by numeral 1.
  • the auxiliary and stationary electrode is designated 3 and the two diodes are designated by 4 and 5. While these have been indicated as single diode elements, for the sake of simplicity, it is to be noted that each of these diode paths can include a plurality of series connected diode groups.
  • the auxiliary electrode located laterally of the ends of contact members 1, 2 is so wide that it covers the entire disconnecting path between the two contacts, so that the length of the arc path between it and the movable contact member 1 is, in he disconnected position, smaller than the distance between the two separated contact members.
  • connection terminals to the switch are designated 6 and 7.
  • the blasting is indicated by the arrows 8 in FIG. 2. This can be effected in known manner, e.g. magnetically or by compressed air.
  • FIG. 3 A magnetic type of blasting arrangement is illustrated in FIG. 3 from which it will be seen that a magnetic field producing coil 15 is provided and which is energized by the current which flows through the switch. This view also shows a release, or tripping out coil 16 which, when energized, causes the switch contacts to open. The pawl for locking the release is indicated at 17.
  • the operating sequence during disconnection of the switch contacts is as follows: Contact member 1 is moved to the right by the operating mechanism shown in FIG. 3. An are 9 is then formed between the two contact members 1 and 2 as indicated by the wavy line 9. If current flow is in the direction indicated by the arrows applied to terminals 6 and 7, the diode 4 transmits current. An are 10 is then blasted between the auxiliary electrode 3 and the moving contact member 1. The current flows then from terminal 6 over diode 4, and across auxiliary electrode 3 and arc 10 to the moving contact member 1 and thence to the current output terminal 7. After the current zero passage point no current can be formed, neither in one nor in the other direction.
  • FIGS. 4-6 illustrate an arrangement which prevents the diodes or diode paths 4 and 5 frqm being stressed by the mains voltage when the switch contacts are open.
  • the auxiliary electrode is divided into two parts 3.1 and 3.2 and each part is connected respectively with a diode. The two parts are arranged side-by-side, but not touching, in the direction of the movable contact member 1.
  • the auxiliary electrode 3.1 is connected with diode 5, the auxiliary electrode 3.2 with diode 4.
  • the designations are the same as in FIG. 1.
  • FIG. 4 shows the switch in the closed state, FIG. 5 in the open state with the burning arcs 9 and 10 during the disconnection.
  • FIG. 7 shows an arrangement which keeps the burning loss completely off the main contacts.
  • a consumption or burn-0E contact 13 located beside electrode 3.1.
  • an additional stationary consumption electrode 14 which is only connected electrically with the moving contact member 1 by conductor 15.
  • the auxiliary electrodes 3.1 and 3.2 are arranged in the same manner as in FIGS. 4-6.
  • the quenching process is similar to that in the arrangement according to FIGS. 4-6 except that the are 10 is blasted from the movingcontact part 1 to between the consumption electrode 14 and auxiliary electrode 3.2 and assumes thus successively substantially the positions 11 and 12. It burns then up to the current zero passage point only between an auxiliary electrode and a consumption electrode. This has the additional advantage that practically no burning loss is any longer possible on the main contact members.
  • an electrical power switch for interrupting alternating currents the combination comprising a pair of disconnectable contact members (2),(1) one of which is stationary and the other movable, at least one auxiliary electrode (3) arranged perpendicularly to and adjacent the disconnecting path between said contact members, the distance between said auxiliary electrode and said contact members being smaller than the length of the disconnecting path between said contact members when fully disconnected, diode circuits each of which includes at least one diode (4),(5) extending respectively between each said contact member and said auxiliary electrode, said diodes being connected in opposition, and means (15) for blasting the are drawn between said contact members upon disconnection in a direction transverse to said disconnecting path.
  • An electrical power switch as defined in claim 1 wherein but a single auxiliary electrode is provided to which are connected both of said diodes, and the width of said auxiliary electrode is substantially equal to the length of said disconnecting path between said contact members.
  • An electrical power switch as defined in claim 1 wherein a pair of auxiliary electrodes (3.1),(3.2) are provided, said diodes being connected respectively to said auxiliary electrodes such that the auxiliary electrode (3.2) located generally opposite the movable contact member 1 when in the disconnected state is connected to the diode (4) in the diode circuit connected to said stationary contact member (2), and the auxiliary electrode (3.1) located generally opposite said stationary contact member (2) is connected to the diode (5) in the diode circuit connected to said movable contact member (1).
  • auxiliary electrodes (3.1) and (3.2) are arranged in a generally side-by-side but electrically insulated manner in the direction of movement of said movable contact member (1) along said disconnecting path.
  • An electrical power switch as defined in claim 1 wherein said means for blasting the are drawn between said contact members is constituted by means producing a magnetic field.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
US628674A 1966-05-26 1967-04-05 Power switch including opposed diodes in circuit with switch contacts Expired - Lifetime US3475574A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH760566A CH436419A (de) 1966-05-26 1966-05-26 Leistungsschalter mit bei der Abschaltung entgegengesetzt geschalteten, je mindestens aus einer Diode bestehenden Diodenkreisen

Publications (1)

Publication Number Publication Date
US3475574A true US3475574A (en) 1969-10-28

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ID=4327735

Family Applications (1)

Application Number Title Priority Date Filing Date
US628674A Expired - Lifetime US3475574A (en) 1966-05-26 1967-04-05 Power switch including opposed diodes in circuit with switch contacts

Country Status (5)

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US (1) US3475574A (de)
CH (1) CH436419A (de)
DE (1) DE1243757B (de)
FR (1) FR1532433A (de)
SE (1) SE328623B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4685019A (en) * 1985-04-29 1987-08-04 Engelhard Corporation Controlled electrical contacts for electrical switchgear
US6011678A (en) * 1997-04-16 2000-01-04 Schneider Electric Sa Electrical device with double AC breaking contacts
WO2005086194A1 (de) * 2004-03-04 2005-09-15 Schaltbau Gmbh Schütz mit zumindest zwei kontakten
US20140374382A1 (en) * 2012-03-06 2014-12-25 Rudolf Gati Arc-Jump Circuit Breaker And Method Of Circuit Breaking

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2177531B1 (de) * 1972-03-28 1974-08-02 Merlin Gerin
DE3005877A1 (de) * 1980-02-16 1981-09-03 Brown, Boveri & Cie Ag, 6800 Mannheim Einrichtung zur loeschung des lichtbogens von elektrischen schaltgeraeten

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2729723A (en) * 1952-02-14 1956-01-03 Siemens Ag Alternating-current circuit interrupters
US2782345A (en) * 1952-03-22 1957-02-19 Fkg Fritz Kesselring Geratebau Alternating current switching device
US3293496A (en) * 1962-02-14 1966-12-20 Bbc Brown Boveri & Cie Switching device for interruption of alternating current
US3388295A (en) * 1964-08-20 1968-06-11 Hubbell Inc Harvey Current interrupter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2729723A (en) * 1952-02-14 1956-01-03 Siemens Ag Alternating-current circuit interrupters
US2782345A (en) * 1952-03-22 1957-02-19 Fkg Fritz Kesselring Geratebau Alternating current switching device
US3293496A (en) * 1962-02-14 1966-12-20 Bbc Brown Boveri & Cie Switching device for interruption of alternating current
US3388295A (en) * 1964-08-20 1968-06-11 Hubbell Inc Harvey Current interrupter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4685019A (en) * 1985-04-29 1987-08-04 Engelhard Corporation Controlled electrical contacts for electrical switchgear
US6011678A (en) * 1997-04-16 2000-01-04 Schneider Electric Sa Electrical device with double AC breaking contacts
WO2005086194A1 (de) * 2004-03-04 2005-09-15 Schaltbau Gmbh Schütz mit zumindest zwei kontakten
US20140374382A1 (en) * 2012-03-06 2014-12-25 Rudolf Gati Arc-Jump Circuit Breaker And Method Of Circuit Breaking
CN104272417A (zh) * 2012-03-06 2015-01-07 Abb技术有限公司 弧跳跃电路断路器及电路断开的方法
CN104272417B (zh) * 2012-03-06 2017-03-15 Abb 技术有限公司 弧跳跃电路断路器及电路断开的方法
EP2823499B1 (de) * 2012-03-06 2017-06-14 ABB Schweiz AG Lichtbogenssprungsschutzschalter und verfahren zur ausschaltung

Also Published As

Publication number Publication date
SE328623B (de) 1970-09-21
CH436419A (de) 1967-05-31
FR1532433A (fr) 1968-07-12
DE1243757B (de) 1967-07-06

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