US2788403A - Electrical isolating switches - Google Patents

Electrical isolating switches Download PDF

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Publication number
US2788403A
US2788403A US570862A US57086256A US2788403A US 2788403 A US2788403 A US 2788403A US 570862 A US570862 A US 570862A US 57086256 A US57086256 A US 57086256A US 2788403 A US2788403 A US 2788403A
Authority
US
United States
Prior art keywords
arms
link
switch
jaw
pivotally connected
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
US570862A
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English (en)
Inventor
Harault Georges
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.)
Forges et Ateliers de Constructions Electriques de Jeumont SA
Original Assignee
Forges et Ateliers de Constructions Electriques de Jeumont SA
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 Forges et Ateliers de Constructions Electriques de Jeumont SA filed Critical Forges et Ateliers de Constructions Electriques de Jeumont SA
Application granted granted Critical
Publication of US2788403A publication Critical patent/US2788403A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/34—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact adapted to engage an overhead transmission line, e.g. for branching
    • H01H31/36—Contact moved by pantograph

Definitions

  • This invention relates to improvements in overhead electrical isolating switches with articulated arms. More particularly it relates to switches that reduce the lateral space occupied by this type of apparatus in the isolating or open position, and to an improvement in the operation of the contacts in the closed position.
  • the kinematic system formed by the articulated arms folds to one side only in relation to the vertical axis of the device.
  • the kinematie system comprises lower arms pivoting on a support and upper arms arranged so as to be displaced substantially in vertical position, a movable contact member having a pair of jaws which, in the raised position of the arms, close upon and engage a stationary contact located above the kinematic system.
  • Fig. 1 is a kinematic diagram of the articulated arms of a switch in accordance with the invention.
  • Fig. 2 is a side elevation of the switch and Fig. 3 is an enlarged fragmentary part-sectional view of the driving mechanism, with the arms in folded position and the switch open.
  • Fig. 1 schematically and specifically in Fig. 2 the switch is mounted upon a support 1, in the form of a porcelain insulator which may be of the oilfilled type, and carrying on top a metal box 2 which encloses the switch driving mechanism hereinafter described.
  • the box 2 is fitted with two parallel horizontal driving shafts 3 and 4 (Fig. 3), at the outer extremities of which are keyed the substantially parallel pivoting arms 5 and 6.
  • the latter are connected by a cross-link 7 at their free ends.
  • Two upper arms ii are pivotally connected to pivoting arms 5 and 6.
  • the bell-crank lever Positioned between arms 5 and 8 is bellcrank lever it with arm 5 pivotally connected to it.
  • the bell-crank it has two arms one of which is carrying the upper arm 8.
  • the latter terminates at a first jaw 11.
  • the other arm of the bellcrank 10 is connected by a sloping cross-link 12 to arm 6 at a selected point spaced from the cross-link 7.
  • a second jaw 13 is pivot
  • the shape of the bell-crank lever ltl, the position of the link 12 and the arrangement of the jaw 13 are selected in such a way that during the lowering movement of the arms 5 and 6 towards the open position, represented in dotted lines in Fig. 2, the jaws l1 and 13 open out about their hinge as they descend.
  • the jaws 11 and 13 close upon a conductor such as 14 with which the isolating switch is to establish contact in the upper closed position, which is indicated in broken lines in Fig. 1.
  • Fig. 3 shows the mechanism for driving the shafts 3 and 4, which carry the respective pivoting arms 5 and 6.
  • Two cylinders 15 and 16 which co-operate with a common plunger or piston 16A, receive liquid under pressure by way of insulating pipes 17 and 18.
  • the piston MA carries a cross-piece 19 adapted to engage a rocker arm or cam 20 which by means of a link 21 actuates in the desired direction the shafts 3 and. 4 on which the arms 5 and 6 are mounted.
  • the isolating switch has articulated arms which fold to only one side in relation to the vertical axis of the arrangement, and that in folding the arms are displaced in such a manner that the lateral space occupied in the open position is at a minimum, thus permitting the switch to be used in restricted spaces. Furthermore, positive contact with an overhead conductor is assured when the arms are in a raised position and the switch closed.
  • pivoting arms 5 and 6 can be driven hydraulically, or mechanically by means of appropriate insulating linkage.
  • the box 2 can be mounted upon a dry insulator without oil.
  • An electrical isolating switch comprising: a switch actuating mechanism, two lower spaced arms substantially parallel and pivotally connected to said mechanism, a first cross-link transverse to and connecting said lower arms, a bell-crank pivotally connected to the free end of one of said lower arms and having two crank arms, two upper arms pivotally connected to said lower arms with one of said upper arms being carried by one of said bell-crank arms, a second cross-link connected to the other of said bell-crank arms and being connected to the other lower arm at a selected point spaced from said first cross-link, a first jaw fixed upon the upper arm which is carried by the bell-crank and being so disposed as to form an extension of said upper arm, a second jaw pivotally connected to said first jaw and being pivotally connected to the other upper arm.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)
  • Level Indicators Using A Float (AREA)
US570862A 1955-03-25 1956-03-12 Electrical isolating switches Expired - Lifetime US2788403A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1030908X 1955-03-25

Publications (1)

Publication Number Publication Date
US2788403A true US2788403A (en) 1957-04-09

Family

ID=9582795

Family Applications (1)

Application Number Title Priority Date Filing Date
US570862A Expired - Lifetime US2788403A (en) 1955-03-25 1956-03-12 Electrical isolating switches

Country Status (6)

Country Link
US (1) US2788403A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE545881A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH328580A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1030908B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1123913A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB790395A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502826A (en) * 1967-02-24 1970-03-24 Siemens Ag Ice disrupting apparatus for an electric scissors type switch
US3784767A (en) * 1970-03-20 1974-01-08 Siemens Ag Disconnect switch
US5186315A (en) * 1990-07-19 1993-02-16 Merlin Gerin High voltage disconnecting switch

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068333B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH373090A (de) 1958-08-29 1963-11-15 Asea Ab Elektrischer Schalter mit selbstsperrender Kontaktanordnung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748121A (en) * 1954-06-17 1956-05-29 Searle & Co 6-nitroaryl derivatives of 2-amino-4-pyrimidols

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT411463A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *
CH258114A (de) * 1943-09-04 1948-11-15 Elin Und Schorch Werke Aktieng Trennschalter in Säulenbauart.
CH296803A (de) * 1950-02-17 1954-02-28 Siemens Ag Trennschalter.
CH320102A (de) 1954-06-10 1957-03-15 Bbc Brown Boveri & Cie Einsäulenscherentrenner für Hochspannungsanlagen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748121A (en) * 1954-06-17 1956-05-29 Searle & Co 6-nitroaryl derivatives of 2-amino-4-pyrimidols

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502826A (en) * 1967-02-24 1970-03-24 Siemens Ag Ice disrupting apparatus for an electric scissors type switch
US3784767A (en) * 1970-03-20 1974-01-08 Siemens Ag Disconnect switch
US5186315A (en) * 1990-07-19 1993-02-16 Merlin Gerin High voltage disconnecting switch

Also Published As

Publication number Publication date
FR1123913A (fr) 1956-10-01
CH328580A (fr) 1958-03-15
BE545881A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE1030908B (de) 1958-05-29
GB790395A (en) 1958-02-05

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