US3252054A - Arc protector for high voltage insulators - Google Patents

Arc protector for high voltage insulators Download PDF

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Publication number
US3252054A
US3252054A US403988A US40398864A US3252054A US 3252054 A US3252054 A US 3252054A US 403988 A US403988 A US 403988A US 40398864 A US40398864 A US 40398864A US 3252054 A US3252054 A US 3252054A
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United States
Prior art keywords
arcing horn
arc
arcing
movable
protective ring
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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
US403988A
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English (en)
Inventor
Hilgarth Gunther
Decker Ernst
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.)
Kronprinz GmbH
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Kronprinz GmbH
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 Kronprinz GmbH filed Critical Kronprinz GmbH
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Publication of US3252054A publication Critical patent/US3252054A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
    • H01B17/44—Structural association of insulators with corona rings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
    • H01B17/46—Means for providing an external arc-discharge path

Definitions

  • the invention relates to high voltage overhead electric power transmission lines, and relates more particularly to insulator chains for such transmission lines that are suspended from crossbars of a pole and in turn suspend conductors. Still more particularly,'the invention relates to are protectors or protective guards to protect the insulator chains from arcing effects.
  • An insulator chain for overhead high voltage electric power transmission line from 220 kv. up generally is provided near the conductor with a protective ring which is made from tubularor rolled stock. These rings serve the purpose to controlthe voltage distribution along the length of the chain, to restrain a premature corona start and, in the event of a flashover, to take on the arc in order to keep it from the porcelain insulators.
  • spiral armatures which are positioned near the crossbar.
  • These spiral armatures are made of round steel, and are in strut form.
  • the excellent protection afforded by these spiral armatures appears to be due to the perfect stabilization of the arc column near the bottom thereof.
  • the arc has-the tendency to burn along the prolongation of the arcing horn as conditioned by the electro-dynamic forces.
  • a long, preferably slender arcing born In order to achieve the aforesaid desirable stabilization of the arc, there is needed a long, preferably slender arcing born.
  • It is a further object of the invention tective rings with movable arcing horns.
  • the movable arcing horn upon the occurrence of the flashover will automatically, depending on the construction, either be moved about a hinge or by moved linearly.
  • the horn will be unblocked for movement by the arc itself, for instance by melting of an arresting pin disposed in the circuit, or by overcoming gravity.
  • the movable arcing horn may dynamic forces and additionally, or instead, be driven by other drive elements such as, for example, by pretensioned springs or propellants; where a chemical propellant is used, it may be triggered by phenomena associated with the are, for example, a decrease in voltage, or the generation of a magnetic field, or the like.
  • FIG. 1 is a fragmentary elevational view, partly in section, of a protective ring in accordance with the invention, including a movable arcing horn that is blocked by an arresting pin;
  • FIG. 2 is a .plan view thereof, partly in section;
  • FIG. 3 is a fragmentary elevational view, partly in section, similar to FIG. 1, but embodying a modification
  • FIG. 4 is a fragmentary elevational view, partly. in section, similar to FIG. 1, tion;
  • FIG. 5 is a fragmentary elevational view, partly in section, similar to FIG. 1, but embodying a still further modification.
  • FIGS. 1 and 2 there is provided a conductor 1 that conducts the electric current.
  • the conductor 1 is suspended from a clamp 2 which, in turn, is supported by a pin 3, that is connected to a cup 4 of the insulator chain 5 that forms a part ofan overhead electric power transmission line.
  • the upper end (not shown) of the insulator chain 5 is suspended from a. crossbar of a pole or mast, and near the crossbar there is provided a conventional armature, preferably of spiral shape (not shown).
  • a two-armed lever 6 is in a well-known manner secured with its lower end to the pin 3, and is secured near its upper end to the protective ring 7 to support it.
  • the protective ring 7 is split (FIGS. 1 and 2).
  • the protective ring 7, moreover, carries insulations 16 (FIG. 2), so that the arm 6 is secured to the protective ring 7 only mechani cally, but is not interconnected thereto electrically.
  • a conducting rod 8 is electrically interconnected, and mechanically secured, near its upper end to the protective ring 7 at a point diametrically opposite to the connection between the arm '6 and the protective ring 7.
  • the conducting rod 8, similar to the lever 6, extends from the ring 7 downwardly and thence is bent at an obtuse angle and projectsv horizontally, and is connected with its far end be driven by electrobut showing a further modificato the movable end of an'arcing horn 9 in the inactive normal position thereof.
  • the horizontal portion of the conducting rod as best shown in FIG. 2, skirts the cup 4; no part of the conducting rod 8 makes any contact with the two-armed lever *6.
  • the arcing horn 9 is movable, namely tiltable about its pivot in the protective ring 7 as a fulcrum; in the aforesaid normal inactive position the arcing horn is releasably connected to the end of the conducting rod 8, namely by means of an arresting fuse pin 10.
  • the arresting fuse pin 10 is so arranged that it will melt and thereby release for rotational movement the arcing horn 9'when current of sufiicient amperage passes through the arresting fuse pin 10.
  • the arresting fuse pin 10 will melt. Thereupon, the elEtro-dynamic forces, which are effective between the two-armed leverfiand the arcing horn 9, will rotate the tiltable arcing horn 9 from its normal inactive position (shown in solid lines in FIG. 1) to the active position 9a (shown in broken lines in FIG. 1), throughout a semicircular path indicated schematically in FIG. 1. In the active position 9a, the arc will burn steadily from the free end of the arcing horn 9.
  • a subsidiary arc will have formed between the end of the conducting rod 8 and the end of the arcing horn 9; this are will, however, become extinguished as soon as the main arc reaches the free end .of the arcing horn 9 as the latter is tilted to the active position 9a.
  • the aforesaid subsidiary arc promotes the transfer of the main arc to the arcing born 9.
  • FIG. 3 shows the same principle as FIG. 1, but the tilting of the arcing horn 9 is aided by a tension spring 11 that extends between a point of the two-armed lever 6 and an extension of the arcing horn 9.
  • FIG. 4 there is shown a further modification.
  • the arcing horn 9 is again tiltably connected to the protective ring 7, and is again not insulated therefrom electrically.
  • the arcing horn 9 is held in the normal inactive position of FIG. 4 by gravity.
  • two-armed lever 6b is disposed diametrically oppositely of the arcing horn 9, and the lever 6a is connected near its lower end to the pin 3, and near its upper end is secured to the protective ring 7.
  • the two-armed lever 6b is not insulated from the ring 7, but is interconnected electrically thereto.
  • a tiltable lever 13 is pivoted at the point of connection of the lever 6b to the ring 7 and is electrically interconnected thereto. The free end of the tiltable lever 13 bears against an insulation 14 that separates the two-armed lever 6b from the tiltable lever 13.
  • a connecting rod 15 connects the free end of the tiltable lever 13 with an extension 912 that is formed on the arcing horn 9.
  • FIG. 5 A difierent modification is shown in FIG. 5, wherein the arcing horn, instead of rotating, moves back and forth telescopically linearly.
  • a two-armed lever 60 To the pin 3 there is again connected a two-armed lever 60, the upper arm of which is secured to the protective ring 7 and electrically interconnected thereto.
  • the lower arm of the lever 6c which is parallel to the central plane of the protective ring 7, includes a projection 6a that is bent upwardly.
  • a tube 17 is threaded onto and electrically interconnected to the projection 6a, and extends with its upper end to a point midway of the protective ring diametrically opposite the point at which the upper arm of the lever 6c is connected to the ring 7. Inside the tube 17 there is a chamber.
  • a rod-like arcing horn 9c is disposed in the chamber of the tube 17 and movable axially between an inactive position wherein the entire rod is confined within the tube 17 (as shown in solid lines in FIG. 5) and an active position wherein the major portion of the rod extends upwardly and projects beyond the confines of the tube 17 (shown in broken lines in FIG. 5).
  • the arcing horn 9c has at its lower end an enlarged portion which joins the rod of the horn 9c conically, and which forms a piston 9d that is movable between upper and lower stations in the chamber of the tube 17. In all'positions of the arcing horn 9c, the piston 9d is confined to the interior of the tube 17.
  • the piston 9d has awidth that corresponds to that of the chamber of the tube 17, and the upper end of the chamber of the tube 17 has a tapered contour that matches that of the tapered upper end of said piston 9d, so that in the upper, active position of the arcing horn 9c, the piston 9d will wedge frictionally in the upper end of the chamber of the tube 17 and make electric contact with the tube 17.
  • a propellant 18 to which there is connected a glow-igniting device that is arranged in auxiliary electric circuit in parallel with the two-armed lever 60. That circuit electrically interconnects leads 19 and 20 which connect the glowigniting device with the projection 6a and with the upper arm of the lever 60.
  • the arcing horn 9c In the normal inactive position, the arcing horn 9c is in the position shown in solid lines in FIG. 5, wherein the piston 9d is positioned in the lower station close to the propellant 18, while the upper end of the arcing horn 9c closes the upper opening of the tube 17.
  • the tube 17 is electrically insulated as against the protective ring 7. Neither the tube 17 nor in its inactive position the arcing horn 9c protrude upwardly beyond the contour of the protective ring 7. e
  • the cap 21 for example, composed of thin synthetic material, closes the upper opening of the tube 17 to prevent the entry of moisture into the chamber.
  • a small bore 17a interconnects the chamber with the exterior of the tube 17, and serves for pressure equalization. Means (not shown) may be provided for covering I the bore 17a to prevent the entry of moisture into the chamber. After the arcing horn 90 has been moved into the active position, the arc will continue to burn from the upper end of the arcing horn 90.
  • An arc protector for use in connection with an insulator suspended from the crossbar of a pole and supporting a conductor of an overhead high voltage electric power transmission line having an armature disposed near said crossbar, comprising a split protective ring adapted to be supported with relation from said insulator near said conductor and including an arcing horn movable between a normal inactive position wherein said arcing horn is disposed in the shadow of the electric field and has maximally little effect with regard to the start of the corona, and an active position, wherein upon the occurrence of a flash-overthe arc will be taken on by the free end of the movable arcing horn, said arcing horn moving from the inactive position to the active position upon the occurrence of the flashover.
  • An arc protector as claimed in claim 1, said movable arcing horn being pivoted to, though electrically insulated from, said protective ring between the ends of said ring near the split thereof and being tiltable about said pivot in a plane radially of said protective ring.
  • An arc protector as claimed in claim 1, said arcing horn being telescopically movable.
  • An arc protector as claimed in claim 1, a tube uprightly adjacent a portion of said protective ring and defining on its interior an elongated chamber and having an upper passage forming an 'intercommunication between the upper portion of said chamber and the exterior of said tube, a piston including a rod forming said arcing horn movable in said chamber between a lower station, wherein said arcing horn is in the inactive position and confined in said tube, and an upper station, wherein said arcing horn is in the active position and projects beyond said tube, a propellant disposed in said chamber below said piston in the lower station thereof, and an auxiliary electric circuit operable to be energized during flashover thereby igniting said propellant.
  • An arc protector as claim in claim 4, the upper portion of said chamber having a tapered contour matching that of the upper portion of said piston, whereby in the upper station the piston will wedge against said tube and make electrical contact therewith.
  • An arc protector as claimed in claim 1, a conducting member connected to said protective ring, an arresting pin connecting said arcing horn to said conducting member in the inactive position of the arcing horn, whereby, upon the occurrence of a flashover, electric current will pass throughsaid conductor and through said arresting pin and through said arcing horn, said arresting pin melting upon the attainment of a predetermined value by said current there-by releasing said arcing horn for movement from said inactive position to said active position.
  • An arc protector as claimed in claim 6, and a tension spring urging said arcing horn into the active position, and accelerating the arcing horn upon its release by the melting of the arresting pin.
  • An arc protector for use in connection with an insulator suspended from the crossbar of a pole and supporting a conductor of an overhead high voltage electric power transmission line having an armature disposed near said crossbar, comprising a protective ring adapted to be supported with relation from said insulator near said conductor and including a plurality of members, at least one of said members being movable, and at least one-other member being stationary and connected to said conductor and supporting said protective ring and being electrically interconnected to said conductor and to said protective ring and having an upright portion, said movable member normally being positioned adjacent said upright portion of said stationary member and being operable upon the occurrence of a flashover to be moved from said normal position to a position at an angle thereto, electric current flowing during the occurrence of said flashover through said stationary member and said movable member in opposite directions.
  • An arc protector as claimed in claim 8, another of said members being movableand constituting an arcing horn and being mechanically connected and electrically interconnected to said one movable member, the electric current upon the occurrence of a flashover flowing through said two movable members in opposite directions.
  • an arc protector system for use in connection with an overhead high voltage electric power transmission line having poles and crossbars, the combination with an insulator suspended from the cross-bar of a pole and supporting a conductor of the line and having an .a normal inactive armature disposed near said crossbar, of a split protective ring supported with relation from said insulator near said conductor and including an arcing horn movable between position wherein said arcing horn is disposed in the shadow of the electric field and has maximally little effect with regard to the start of the corona, and an active position, wherein upon the occurrence of a flashover the arc will be taken on by the free end of the movable arcing horn, said arcing horn moving from the inactive position to the active position upon the occurrence of the flashover.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
US403988A 1963-10-17 1964-10-15 Arc protector for high voltage insulators Expired - Lifetime US3252054A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK51108A DE1288176B (de) 1963-10-17 1963-10-17 Lichtbogenabweisende Schutzarmatur fuer Isolatoren, insbesondere fuer Isolatorenketten

Publications (1)

Publication Number Publication Date
US3252054A true US3252054A (en) 1966-05-17

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ID=7225869

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Application Number Title Priority Date Filing Date
US403988A Expired - Lifetime US3252054A (en) 1963-10-17 1964-10-15 Arc protector for high voltage insulators

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US (1) US3252054A (de)
AT (1) AT267639B (de)
CH (1) CH425931A (de)
DE (1) DE1288176B (de)
NL (1) NL6412021A (de)
SE (1) SE302486B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909624A (en) * 1974-08-07 1975-09-30 Us Air Force Split-ring marx generator grading
USD746775S1 (en) * 2014-02-07 2016-01-05 Siemens Aktiengesellschaft Corona ring
USD771567S1 (en) * 2014-02-07 2016-11-15 Siemens Aktiengesellschaft Corona ring

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015007708A1 (de) * 2015-06-17 2016-12-22 Tridelta Überspannungsableiter Gmbh Haltestrebe für ein Potentialsteuerelement eines Überspannungsableiters, Potentialsteuervorrichtung mit einer Mehrzahl von Haltestreben und Überspannungsableitervorrichtung mit einer Potentialsteuervorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1690200A (en) * 1927-10-20 1928-11-06 Westinghouse Electric & Mfg Co Transmission-line device
US1972613A (en) * 1929-04-12 1934-09-04 Ohio Brass Co Arcing guide for insulators

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE416446C (de) * 1925-07-15 Elin Akt Ges Fuer Elek Sche In Isolatorenketten

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1690200A (en) * 1927-10-20 1928-11-06 Westinghouse Electric & Mfg Co Transmission-line device
US1972613A (en) * 1929-04-12 1934-09-04 Ohio Brass Co Arcing guide for insulators

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909624A (en) * 1974-08-07 1975-09-30 Us Air Force Split-ring marx generator grading
USD746775S1 (en) * 2014-02-07 2016-01-05 Siemens Aktiengesellschaft Corona ring
USD771567S1 (en) * 2014-02-07 2016-11-15 Siemens Aktiengesellschaft Corona ring

Also Published As

Publication number Publication date
DE1288176B (de) 1969-01-30
AT267639B (de) 1969-01-10
NL6412021A (de) 1965-04-20
SE302486B (de) 1968-07-22
CH425931A (de) 1966-12-15

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