US2781426A - Disconnect switch - Google Patents

Disconnect switch Download PDF

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Publication number
US2781426A
US2781426A US514189A US51418955A US2781426A US 2781426 A US2781426 A US 2781426A US 514189 A US514189 A US 514189A US 51418955 A US51418955 A US 51418955A US 2781426 A US2781426 A US 2781426A
Authority
US
United States
Prior art keywords
scissors
disconnect switch
axles
links
axle
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
US514189A
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English (en)
Inventor
Lardelli Otto
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
Original Assignee
Bbc Brown Boveri & Cie
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
Priority to IT535383D priority Critical patent/IT535383A/it
Priority to BE538872D priority patent/BE538872A/xx
Priority to CH326724D priority patent/CH326724A/de
Priority to DEA20605A priority patent/DE1030421B/de
Application filed by Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Priority to US514189A priority patent/US2781426A/en
Priority to FR1133497D priority patent/FR1133497A/fr
Application granted granted Critical
Publication of US2781426A publication Critical patent/US2781426A/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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
    • C09D161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C09D161/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C09D161/24—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with urea or thiourea

Definitions

  • This invention relates in general to disconnect switches for use on high voltage systems and more particularly to switches of the type adapted to be mounted upon insulating pillars and having a movement from a lower, retracted open position on the pillar, to a raised, extended closed position wherein electrical contact is made by the upper end of the extendable switch mechanism with an overhead conductor or bus-bar.
  • Such switches permit the connection of vertically intersecting bus-bars at the point of least distance between the conductors.
  • the elements need to be constructed in such manner that the contacts will be cer tain to close in a positive manner. This involves the contact pressure as well as the various possible positions of the overhead contact which may shift due to various causes such as wind, etc.
  • One known construction for such a disconnect switch comprises a pair of parallel spaced scissors, each consisting of one or several links, and operated by pivotal movemerit of the lower links of each scissors about their lower ends.
  • the twin scissors are arranged symmetrically, the upper ends thereof carrying the movable contact parts usually move up vertically in the plane of the pillar on which the mechanism is supported.
  • the path of the movable contact parts follows a curve.
  • the movable contact parts may also move in a plane other than that containing the axis of the support pillar.
  • the object of this invention is to provide a disconnect switch having twin, i. e. spaced parallel scissors carrying the movable contact element at the upper ends thereof, each scissors comprising one or several articulated links, and wherein the lower ends of the lowermost links of each scissors are mounted for rotation on horizontal axles which, in addition to rotation about their axes, are also arranged for movement in a plane vertical to those axes.
  • these axles can be mounted on pivotally mounted levers, the pivot axes of these levers being arranged stationarily within the head of the support pillar.
  • Such head contains the drive mechanisms for scissors operating axles which cause the scissors to be raised and lowered.
  • two movable axles are provided, each being mounted on a pivotally mounted lever, and a spur gear on each said axle is coupled to another spur gear of the same diameter on the pivot axle of the corresponding lever through an intermediate spur gear which is mounted on the lever.
  • the diameters of the outer spur gears being equal, it becomes possible to turn the lever about its pivot axis without materially affecting the position of the two spur gears if one of the two is being held in place.
  • the mechanism according to the invention has the following advantages: After the disconnect switch, through pivotal movement of the lowermost links of each scissors, has reached the on" or closed" position wherein the r type arrangement.
  • the contact pressure can be made, to give an example, approximately equal to the weight of the scissor
  • springs acting upon the pivotally mounted levers it becomes possible to generate forces in the direction of movement of the scissors, thereby establishing the correct contact pressure.
  • the free ends of the springs preferably are secured in such manner that the springs can be adjusted.
  • the foregoing method of producing an adjustable contact pressure results in a substantial simplification of the contact construction. It is possible to use the conductor wires of the bus-bar system as the opposed, i. e. stationary contacts, such contacts being structurally detached from the disconnect switch mechanism. It is expedient to protect the conductors within the area of contact by pieces of pipe. If the conductors and disconnect switch mechanism are subject to lateral stresses, for example, due to wind pressure, such stresses will be absorbed elastically by the springs acting upon the pivotally mounted levers without overburdening the scissors, the support pillar or the drive mechanism for the scissors. This also holds true for any vertical stresses which may be created by ice loads or expansion due to changes in temperature.
  • the flexibility of the disconnect switch according to the invention is further improved by the placing of at least one elastic unit between the spur gear mounted on each of the two movable axles and serving as the driving link, and the initial link to the mechanism driving the scissors, for example, a hand operated crank.
  • said elastic unit When the disconnect switch is closed," said elastic unit will be under tension and create the clamping force of the scissors. Since the magnitude of the clamping force can be kept relatively low, it is possible to utilize soft springs, with the result that the flexibility of the scissors mechanism will be greater than would be the case were strong contact springs to be used according to known constructions.
  • Fig. 1 is a side view in elevation of the disconnect switch mechanism
  • Fig. 2 is a vertical central longitudinal section on line 2-2 of Fig. 3 through the head portion of the support pillar drawn to a somewhat larger scale, and showing the mechanism for effecting movement of the scissors;
  • Fig. 3 is a plan view of the mechanism within the head of the support pillar.
  • Fig. 4 is a fragmentary detail showing means for adjusting the springs which act on levers associated with the scissors links.
  • twin scissors disconnect switch is comprised of a pair of scissors, only one being seen in this view, the other being directly behind and in line with the one which is visible.
  • Each leg of each scissors is comprised of a plurality of links articulated in end-to-end relation.
  • One leg consists of the articulated links 1, 2 and the other leg consists of the articulated links 1, 2'.
  • the lower ends of the lowermost links 1 and 1' are secured to axles 3 and 3' and, as these axles are rotated in counterdirections, the links will cause the scissors to move vertically from a retracted position indicated in dash-dot lines to an extended position shown in full lines.
  • Links 2 and 2 are pivotally connected together at 4 and the upper ends of these links terminate in jaws 5, 5 having confronting sets of projections or teeth 6, 6 between which the overhead contact member 7 is grasped as the scissors close.
  • axle 3 is mounted for rotation in the outer portions of the legs 8 of a U-type lever 9, the legs of the U being mounted for rotation on a stationary axle 10 which is journalled in bearings 11 at the opposite sides of a casing 12 located atop an insulating support column 13.
  • a second insulator column 14 Parallel with column 13 is a second insulator column 14 in which is mounted a shaft 23 driven by mechanism located in the base 15 upon which the insulators 13 and 14 rest.
  • Opposite sides oi the casing 12 are provided with aligned slots 16 within which the axle 3 can move vertically as the pivotally mounted lever 9 is caused to move.
  • the other axle 3' is mounted in the legs 8 of.
  • a U-typc lever 9 mounted for rotation on a stationary axle ltl'.
  • Spur gear 17 Secured upon axle 3 intermediate the U legs 8 is a spur gear 17 which acts upon a spur gear 18 that is mounted for rotation with axle 10 also intermediate the U legs 8, through an intermediate spur gear 19 that is mounted on an axle 20 carried by the U legs 8.
  • Spur gears 17 and 18 have the same diameter. in a similar manner a spur gear 17' secured upon axle 3 acts upon a spur gear 18' mounted for rotation with axle 16 through an intermediate spur gear 19' mounted on axle 20 carried by U legs 8'.
  • a spring 21' has one end fixed to casing 12 and the other end secured to the closed end of U lever 9'. If desired, the force exerted by springs 21, 21' may be adjusted.
  • Fig. 4 shows an ar rangement for effecting this result, it being noted that the rest point for the lower end of spring 21 is constituted by the upper headed end of a threaded bolt 33, the shank 34 of which extends through an opening in the bottom wall of casing 12 and is threaded into a stationary nut 35 secured as by welding to the underface of such bottom wall. By turning the bolt 33, it may thus be raised or lowered thus raising or lowering the rest point for the lower end of spring 21 and adjusting its force accordingly.
  • the drive mechanism for rotating the axles 3 3' is comprised of the vertical shaft 23 which constitutes the initial drive unit of the mechanism driving the scissors, said shaft extending upwardly through insulator column 14 into the casing 12.
  • the upper end of shaft 23 is elastically coupled to a shaft 24 coaxial with shaft 23 by means of a helical spring 25 which encloses the end portions of both shafts 23, 24 and is connected to each shaft so that as the shaft 23 is rotated, the shaft 24 will likewise be rotated through the torsional effect produced in the spring 25.
  • a bevel gear 26 secured to the upper end of shaft 24 is meshed with a bevel gear 27 secured upon a horizontal shaft 28 and bevel gears 29, 30 secured at the outer ends of shaft 28 mesh respectively with bevel gears 31, 32 secured respectively upon the outer ends of shafts 10 and 10'.
  • Rotation of shafts 10 and 10 effect rotation of gears 18, 18 and hence bring about rotation of axles 3, 3'.
  • a disconnect switch adapted for use on high voltage the combination comprising twin scissors each having at least one link, said scissors carrying the movable con tact, the two lower links of each scissors being mounted upon movable axles for rotation about the axle axes and means for effecting movement of said axles vertically to the plane of the axles.
  • a disconnect switch adapted for use on high voltage the combination comprising twin scissors each having at least one link, said scissors carrying the movable con tact, the two lower links of each scissors being mountcd on movable axles for rotation about the axle axes, pivotaily mounted levers arranged for rotation about stationary axles, said levers carrying said movable axles, and meant; for moving said levers and simultaneously rotating said movable axles about their respective axes, said levers being arranged within the head of a support pillar lor the scis sors.
  • a disconnect switch as defined in claim 2 wherein said means for moving said levers and rotating said n1ovable axles comprises a spur gear mounted on each of said movable axles is coupled to a spur gear of like diameter mounted on the corresponcing lever axle through an intermediate gear also mounted on the corresponding lever.
  • a disconnect switch as defined in claim l wherein the movable contact embodied in each of said scitors comprises a pair of jaws connected to the upper links of the scissors and which clamp around the stationary contact when said scissors are raised.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
US514189A 1955-06-09 1955-06-09 Disconnect switch Expired - Lifetime US2781426A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
IT535383D IT535383A (enrdf_load_html_response) 1955-06-09
BE538872D BE538872A (enrdf_load_html_response) 1955-06-09
CH326724D CH326724A (de) 1955-06-09 1954-06-10 Hochspannungs-Säulentrennschalter
DEA20605A DE1030421B (de) 1955-06-09 1954-06-25 Hochspannungs-Einstuetzertrennschalter
US514189A US2781426A (en) 1955-06-09 1955-06-09 Disconnect switch
FR1133497D FR1133497A (fr) 1955-06-09 1955-06-10 Interrupteur de coupure à colonne pour haute tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US514189A US2781426A (en) 1955-06-09 1955-06-09 Disconnect switch

Publications (1)

Publication Number Publication Date
US2781426A true US2781426A (en) 1957-02-12

Family

ID=24046154

Family Applications (1)

Application Number Title Priority Date Filing Date
US514189A Expired - Lifetime US2781426A (en) 1955-06-09 1955-06-09 Disconnect switch

Country Status (6)

Country Link
US (1) US2781426A (enrdf_load_html_response)
BE (1) BE538872A (enrdf_load_html_response)
CH (1) CH326724A (enrdf_load_html_response)
DE (1) DE1030421B (enrdf_load_html_response)
FR (1) FR1133497A (enrdf_load_html_response)
IT (1) IT535383A (enrdf_load_html_response)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988611A (en) * 1958-05-21 1961-06-13 Asea Ab Isolating switch of the pantograph type
US3784767A (en) * 1970-03-20 1974-01-08 Siemens Ag Disconnect switch
US10515772B2 (en) * 2016-08-05 2019-12-24 Abb Schweiz Ag Disconnector and manufacturing method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL253677A (enrdf_load_html_response) 1959-07-18
DE3124805C2 (de) * 1981-06-24 1983-05-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Einsäulen-Trennschalter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1988120A (en) * 1932-03-23 1935-01-15 Ohio Brass Co Disconnecting switch
AT168743B (de) * 1948-09-02 1951-07-25 Elin Ag Elek Ind Wien Trennschalter in Säulenform

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR882025A (fr) * 1942-05-13 1943-05-14 Entpr S Electr De L Ouest Soc Dérivateur-sectionneur portatif pour ligne haute tension
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.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1988120A (en) * 1932-03-23 1935-01-15 Ohio Brass Co Disconnecting switch
AT168743B (de) * 1948-09-02 1951-07-25 Elin Ag Elek Ind Wien Trennschalter in Säulenform

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988611A (en) * 1958-05-21 1961-06-13 Asea Ab Isolating switch of the pantograph type
US3784767A (en) * 1970-03-20 1974-01-08 Siemens Ag Disconnect switch
US10515772B2 (en) * 2016-08-05 2019-12-24 Abb Schweiz Ag Disconnector and manufacturing method

Also Published As

Publication number Publication date
DE1030421B (de) 1958-05-22
CH326724A (de) 1957-12-31
BE538872A (enrdf_load_html_response)
FR1133497A (fr) 1957-03-27
IT535383A (enrdf_load_html_response)

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