US2794870A - Disconnect switch for high voltage lines - Google Patents

Disconnect switch for high voltage lines Download PDF

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Publication number
US2794870A
US2794870A US521284A US52128455A US2794870A US 2794870 A US2794870 A US 2794870A US 521284 A US521284 A US 521284A US 52128455 A US52128455 A US 52128455A US 2794870 A US2794870 A US 2794870A
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US
United States
Prior art keywords
contact
line
movable contact
cable
disconnect switch
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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US521284A
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English (en)
Inventor
Thommen Hans
Butz Lothar
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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Publication date
Application filed by Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
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Publication of US2794870A publication Critical patent/US2794870A/en
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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
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/32—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with rectilinearly-movable contact

Definitions

  • the invention relates to a high voltage disconnector of the column type for which a reliable closing of the switch is made possible in a very simple manner. According to the invention, this is achieved in that the movable contact is suspended from the high voltage line while the fixed, countercontact is located on the lower supporting insulator of the disconnector, so that the contact connection occurs through a movement from the top down.
  • the movable i. e. lowerable contact is suspended from a line 1 of an upper collector bar or overhead system, while the fixed countercontact is located on the supporting insulator 2 of the disconnector.
  • Fig. 1 there is illustrated an embodiment for the disconnector, or disconnect switch as it is also called, wherein the movable, lowerable contact is constituted by an electrically conductive weight 3 which is suspended from the line cable 1 by means of a flexible, electrically conductive cable which is arranged to be wound and unwound on a drum 4 carried by a support 9.
  • the drum 4 is driven in the desired direction to raise or lower the weight 3 by means of transmission gearing driven by suitable means and having gears indicated by numeral 6.
  • the upper end of the cable 5 is electrically connected to the line cable by suitable means, not shown, andthe weight 3 is adapted to engage the fixed, countercontact member 3a on the supporting insulator 2 as it is lowered by unwinding the cable 5 from drum 4.
  • the line 1 is subject to swinging motions attributable to various causes with the result that it becomes desirable to assure engagement between the contact members 3, 3a notwithstanding any swinging, pendulum like motion of the weight contact 3 due to motions of the line which are transmitted to the weight contact 3 through the flexible cable 5.
  • complementary configured, coengageable frusto-conical male and female frame elements 7, 8 are associated respectively wit-h the weight contact 3 and the fixed contact 3a such that the weight contact 3 will always be guided into direction position over the fixed contact member 3a as the former is lowered into proximity with the latter.
  • the disconnect switch is shown with the contact members 3, 3a in engaged position thus establishing an electrical connection from line 1 through cable 5 and contact members 3, 3a to a branch line such as the line 1a that can be supported at the top of the insulator column 2.
  • Fig. 1a shows the contact members 3, 3a in separated position in which the cable 5 is substantially completely wound upon the drum 4.
  • Figs. 3 and 3a illustrate an embodiment wherein the movable, lowerable contact member is suspended from the line cable 1 by means of a toggle lever arrangement.
  • the movable contact member 11 preferably designed with one or more spade-like contact parts, is adapted, upon lowering to engage a trough-shaped, fixed, countercontact 19 carried at the upper end of the pedestal insulator 2.
  • the spade-like configuration for the movable contact member 11 cooperates with the complementary configured trough-like fixed contact 19 in the same manner as the frusto-conical members 7, 8 in the embodiment of Fig. 1, namely to assure engagement between the contact members notwithstanding swinging movement of the movable contact member 11 due to movement of the line 1.
  • Fig. 3 shows the movable contact member 11 in the lowered position in engagement with the fixed, countercontact member 19, and Fig. 3a shows the contact member 11 in the raised position.
  • the movable contact 11 is located at the free end of the lower arm 12 of the toggle, while the other lever arm 13 of the toggle, constructed in the form of a tube, is rotatably disposed at the line cable 1.
  • a sprocket wheel 14 concentric with the axis of rotation
  • a second sprocket 15 is located at the opposite end of lever arm 13 concentric with the axis of rotation of lever arm 12 so that a differential movement is produced between the two lever arms.
  • the sprockets 14 and 15 are interconnected by a sprocket chain 16.
  • Actuation of the toggle comprised by levers 12, 13 is effected by means of another lever 17 which is articulated to the toggle lever 13 and is caused to rotate by a suitable driving mechanism.
  • the toggle levers 12, 13 are disposed in outstretched, aligned position as is clear from Fig. 3, while in switch, the toggle levers 12, 13 are folded.
  • the movements of the drive are transmitted from the drive itself through an insulating shaft 32 and an endless rope 18 to the lever mechanism 17 for actuating the toggle levers 12, 13. It is possible also to make the entire transmission from the drive to the disconnect switch mechanism only by means of a rope or an insulated shaft.
  • the drive may also be disposed at a different point on the gantry, for example at mid-height, or even on the ground at the foot of the gantry.
  • the drive may be mounted on a special supportinginsulator and the control movements may be transmitted to the movable contact member of the disconnecting switch by means of a rope.
  • a supplementary compressed air tank can be provided, the tank being disposed parallel to the supply line for the compressed air drive.
  • Figs. 4 and 4a Still another embodiment of the invention is illustrated in Figs. 4 and 4a.
  • the movable contact member 20 in the form of a downwardly opening U-shaped member with spreading arms 20a is mounted at one end of a tubular bar 21 which is mounted for rotation approximately in the center at the line cable 1.
  • Bar 21 which, in the disconnected position (Fig. 4a) is parallel to the line cable 1, is first caused to rotate through an angle of about 90 by means of a transmission gearing during a connection stroke and then is caused to move downward until the arms 20a of the contact member 20 embrace the fixed contact 22. Details of the movement of bar 21 are as follows: First the bar 21 is rotated through an angleof about 90 by means of a toothed segment 23 which comes into engagement with a gear wheel 24 disposed on bar 21.
  • Figs. 3, 3a and 4, 4a have the same principal advantage as that inherent in Figs. 1, la and 2, namely that the force of gravity is employed in moving the movable contact toward the fixed contact and maintaining pressure between the two after engagement therebetween.
  • the disconnect switch in accordance with the present invention is not limited to the specific embodiments illustrated but rather its principles are applicable to still further embodiments.
  • the movable, lowerable contact may be fastened to a scissor type of lever mechanism mounted on the line cable, the scissor being capable of various forms.
  • the current carrying parts of the disconnect switch are preferably made of light-weight electrically conductive metallic material such as aluminum or aluminum alloy.
  • a disconnect switch of the vertical column type for a high voltage line where the switch contacts are structurally separated from each other comprising an insulating support disposed below said line, a fixed contact carried by said support, a movable contact electrically connected to said high voltage line, and electrically conductive means for lowering said movable contact from said line into engagement with said fixed contact.
  • a disconnect switch of the vertical column type for a high-voltage line where the switch contacts are structurally separated from each other comprising an insulating support disposed below said high-voltage line, a fixed contact carried by said support, a movable contact electrically connected to said highvoltage line, and electrically conductive means for low- 7 ering said movable contact from said high-voltage line into engagement with said fixed contact, said means for lowering said movable contact into engagement with said fixed contact being comprised of a toggle mechanism, said toggle mechanism including a first lever having one end thereof arranged for rotation about a fixed pivot axis adjacent said line, a second lever pivotally connected at one end to the opposite end of said first lever, said movable contact being mounted on the other end of said second lever, sprockets arranged respectively at the opposite ends of said first lever concentric with the pivot axes at such ends, a chain interconnecting said sprockets, said chain and sprockets being arranged to effect pivotal movement
  • a disconnect switch of the vertical column type for a high-voltage line where the switch contacts are structurally separated from each other comprising an insulating support disposed below said highvoltage line, a fixed contact carried by said support, a movable-contact electrically connected to said high-voltage line, and electrically conductive means for lowering said movable contact from said high-voltage line into engagement with said fixed contact, said means for low ering said movable contact from said line into engagement with said fixed contact comprising a bar having said movable contact secured to one end thereof, said bar being mounted for rotation about an axis intermediate the bar ends from a horizontal position adjacent and substantially parallel with said line to a vertical position normal to said line and in vertical alignment with said fixed contact, and said bar then being lowerable longitudinally of itself thereby to bring said contact member into engagement with said fixed contact.
  • a disconnect switch of the vertical column type for a high-voltage line where the switch contacts are structurally separated from each other comprising an insulating support disposed below said high-voltage line, a fixed contact carried by said support, a gantry to which one end of said high-voltage line is secured and terminated, a movable contact electrically connected to said high-voltage line and electrically conductive means including drive means therefor mounted on said gantry for lowering said movable contact from said high-voltage line into engagement with said fixed contact.
  • said drive means for said contact lowering means is comprised of a compressed air motor and which further includes a supplementary compressed air tank disposed parallel to the air supply line for said drive to permit manual operation of said disconnect switch.
  • a disconnect switch as defined in claim 1 wherein said means for lowering said movable contact into engagement with said fixed contact includes drive means therefor mounted upon a support below said line, and an endless drive transmission extending from said drive means to said contact lowering means.
  • a disconnect switch as defined in claim 1 wherein said means for lowering said movable contact into engagement with said fixed contact includes drive means therefor supported on the ground below said line.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Gas-Insulated Switchgears (AREA)
US521284A 1954-07-13 1955-07-11 Disconnect switch for high voltage lines Expired - Lifetime US2794870A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2794870X 1954-07-13

Publications (1)

Publication Number Publication Date
US2794870A true US2794870A (en) 1957-06-04

Family

ID=4571844

Family Applications (1)

Application Number Title Priority Date Filing Date
US521284A Expired - Lifetime US2794870A (en) 1954-07-13 1955-07-11 Disconnect switch for high voltage lines

Country Status (5)

Country Link
US (1) US2794870A (enrdf_load_stackoverflow)
BE (1) BE539804A (enrdf_load_stackoverflow)
CH (1) CH322040A (enrdf_load_stackoverflow)
DE (1) DE1043455B (enrdf_load_stackoverflow)
FR (1) FR1128894A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089927A (en) * 1960-02-01 1963-05-14 Ite Circuit Breaker Ltd Isolating switch arrangement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1087215B (de) * 1958-02-14 1960-08-18 Licentia Gmbh Anordnung von Isolierstoffseilen zur Betaetigung bzw. Stellungsrueckmeldung von auf Hochspannungspotential liegenden Schaltgeraeten
DE1131770B (de) * 1958-12-09 1962-06-20 Licentia Gmbh Seiltrennschalter fuer Hochspannungsschaltanlagen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190314908A (en) * 1903-07-04 1904-05-05 Ernest Edgley Prestwich Improvements in or relating to Electric Contacts
AT168743B (de) * 1948-09-02 1951-07-25 Elin Ag Elek Ind Wien Trennschalter in Säulenform

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE351592C (de) * 1922-04-12 Bergmann Elek Citaets Werke Ak Anordnung fuer Trennschalter mit Isolierung durch Haengeisolatoren
DE731061C (de) * 1938-08-12 1943-02-01 Siemens Ag Hubtrennschalter fuer Freilufthochspannungsschaltanlagen
BE444354A (enrdf_load_stackoverflow) * 1941-01-28
FR931564A (fr) * 1941-06-13 1948-02-26 Alsthom Cgee Perfectionnement apporté aux interrupteurs et sectionneurs électriques, notamment à ceux à grande longueur de coupure
DE1007851B (de) 1953-01-13 1957-05-09 Licentia Gmbh Trennschalter fuer Hoch- bzw. Hoechstspannungsanlagen mit in verschiedenen uebereinanderliegenden Ebenen verlegten Sammelschienen bzw. Abzweigleitungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190314908A (en) * 1903-07-04 1904-05-05 Ernest Edgley Prestwich Improvements in or relating to Electric Contacts
AT168743B (de) * 1948-09-02 1951-07-25 Elin Ag Elek Ind Wien Trennschalter in Säulenform

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089927A (en) * 1960-02-01 1963-05-14 Ite Circuit Breaker Ltd Isolating switch arrangement

Also Published As

Publication number Publication date
FR1128894A (fr) 1957-01-11
BE539804A (enrdf_load_stackoverflow)
CH322040A (de) 1957-05-31
DE1043455B (de) 1958-11-13

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