US3273010A - Arc arresting spark gap assembly for lightning arresters - Google Patents

Arc arresting spark gap assembly for lightning arresters Download PDF

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Publication number
US3273010A
US3273010A US325698A US32569863A US3273010A US 3273010 A US3273010 A US 3273010A US 325698 A US325698 A US 325698A US 32569863 A US32569863 A US 32569863A US 3273010 A US3273010 A US 3273010A
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US
United States
Prior art keywords
arc
legs
electrode
insulator
plates
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
US325698A
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English (en)
Inventor
Sacer Joze
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 US3273010A publication Critical patent/US3273010A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/16—Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
    • H01T4/18—Arrangements for reducing height of stacked spark gaps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/02—Means for extinguishing arc
    • H01T1/04—Means for extinguishing arc using magnetic blow-out
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0059—Arc discharge tubes

Definitions

  • a stacked arc gap structure which comprises a plurality of plates of insulating material stacked in superposed relation, these insulating plates having an electrode on each side and so constructed that an electrode of one plate forms an arc gap with an electrode of the adjacent plate in the stack.
  • the arcs formed in these gaps are under the influence of a common magnetic field generated by one or more quenching coils, and the arcs are moved toward the outer peripheries of the arc chambers formed by the stacked insulator plates, and are thus extended.
  • electrodes of the divergent type are used, i.e. two electrodes forming one are gap are positioned at an angle to each other, e.g. at an angle of 90, so that they create a screw thread type of arc path around the longitudinal axis of the assembly of arc gaps.
  • the object of the present invention is to provide an improved arrangement for plate type lightning arrester arc gap structures which function without the necessity of providing a special quenching coil to establish the magnetic field, and which at the same time exhibit a considerably greater quenching ability than the known are gap stacks, this being accomplished by extending the arc to a degree heretofore not yet obtainable. Moreover, the resistance of the arrester to back-fire is also increased.
  • the object of the invention is to provide an improved lightning arrester of the type utilizing voltage-dependent resistances and spark gaps wherein the arcs in the are gaps are extinguished by magnetic fields produced by the arcs themselves, there being a plurality of axially stacked plates of insulating material which have an electrode on each side and wherein quenching chambers are formed by the plates.
  • the aforementioned improvements are obtained by constructing the electrodes in an essentially hairpin i.e. U-shaped configuration, the legs of the electrodes having indentures to establish a response point for the arc, and the free ends of the legs being bent back upon themselves.
  • These hairpin shaped electrodes are inserted into their respective insulating plates so that their two legs lie on opposite sides of the appertaining plate, and one leg of electrode together with the opposite leg of an adjacent electrode in the adjacent insulator plate always establish one are gap, all of the arc gaps thus formed being arranged axially one above the other.
  • FIG. 1 is a view in front elevation showing a stack of the insulator plates and their electrodes
  • FIG. 2 is likewise a front view of one of the insulator plates showing the details of electrode insertion;
  • FIG. 3 is a top view of one of the insulator plates and its hairpin shaped electrode, the view being partly in plan and partly in section;
  • FIG. 4 is a top plan view of one of the hairpin shaped electrodes.
  • the insulator plates 1 are further designed so that insertion of the electrode pieces 3 is possible without bending them, and the necessary creep distance to adjacent electrodes is maintained by means of cavities. Moreover, the quenching chambers formed by the stack of insulator plates 1 are closed oil towards the exterior at the insertion slots 2 for the electrodes by means of projections at the circumference of the plates.
  • Another advantage of the improved construction in accordance with the invention resides in the fact that the two points of response 4 of each arc gap are separated by a great distance from the bending points of the electrode horns 5. This distance is greater than half of the length of leg 3a. Consequently, there is also a long distance between the points of response 4 and the are 7 and a small sight angle of the arc from the point of response through which are achieved a rapid electric stabilization of the point of response and an increased resistance to back-fire.
  • an arc arresting spark gap assembly for lightning arresters of the type wherein the spark gaps are connected in circuit with voltage-dependent resistances and quenching of the arcs in the gaps is eifected by an are produced magnetic field
  • the combination comprising a plurality of axially stacked cylindrical plates made from insulating material and an electrode piece inserted into each said plate, each said electrode piece being essentially of hairpin shape, the two legs of each electrode piece including an indenture forming a point of arc response and the free ends of the legs being bent back to establish horns, said two legs of each electrode piece being disposed substantially parallel to a diametral axis of the insulator plate and located respectively on opposite sides of the insulator plate in which it is inserted such that each arc gap is established by the indentures of respective legs of electrode pieces inserted in adjacent insulator plates, said legs of all of said electrode pieces having a length substantially exceeding the radius of said cylindrical insulator plates thereby to establish a maximum possible length of arc in each arc gap greater than the
  • each said insulator plate is provided with a radially extending slot into which the corresponding hairpin shaped electrode piece is inserted.
  • each said insulator plate is so configured as to enable the correspoding hairpin shaped electrode piece to be inserted in the slot thereof without bending.
  • An arc arresting spark gap assembly as defined in claim 1 wherein quenching chambers for the arc gaps are formed within said insulator plates which are generally cylindrical, and said quenching chambers are closed off toward the exterior at the insertion points of said electrode pieces by means of projections provided at the circumference of said plates.

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  • Thermistors And Varistors (AREA)
US325698A 1962-11-28 1963-11-22 Arc arresting spark gap assembly for lightning arresters Expired - Lifetime US3273010A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1395062A CH396181A (de) 1962-11-28 1962-11-28 Funkenstreckenanordnung für Überspannungsableiter

Publications (1)

Publication Number Publication Date
US3273010A true US3273010A (en) 1966-09-13

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ID=4396705

Family Applications (1)

Application Number Title Priority Date Filing Date
US325698A Expired - Lifetime US3273010A (en) 1962-11-28 1963-11-22 Arc arresting spark gap assembly for lightning arresters

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US (1) US3273010A (de)
AT (1) AT239896B (de)
CH (1) CH396181A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504226A (en) * 1968-02-20 1970-03-31 Gen Electric Spark gap assembly for current limiting lightning arresters or like articles
US3515947A (en) * 1968-02-29 1970-06-02 Gen Electric Inclined arc chamber for a spark gap
US3708711A (en) * 1970-02-24 1973-01-02 Alsthom Cgee Explosion proof high voltage resistance arrester

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2783336A (en) * 1949-10-13 1957-02-26 Merlin Gerin Arc extinguishing chamber
US2825008A (en) * 1953-06-02 1958-02-25 Ohio Brass Co Lightning arresters
US2913626A (en) * 1957-10-04 1959-11-17 Bbc Brown Boveri & Cie Multiple spark gap arrangement for lighining arresters
US2917662A (en) * 1958-01-07 1959-12-15 Mc Graw Edison Co Arc arrester spark gap
US3151274A (en) * 1961-12-27 1964-09-29 Gen Electric Current limiting lightning arrester using porous material in the gap structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2783336A (en) * 1949-10-13 1957-02-26 Merlin Gerin Arc extinguishing chamber
US2825008A (en) * 1953-06-02 1958-02-25 Ohio Brass Co Lightning arresters
US2913626A (en) * 1957-10-04 1959-11-17 Bbc Brown Boveri & Cie Multiple spark gap arrangement for lighining arresters
US2917662A (en) * 1958-01-07 1959-12-15 Mc Graw Edison Co Arc arrester spark gap
US3151274A (en) * 1961-12-27 1964-09-29 Gen Electric Current limiting lightning arrester using porous material in the gap structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504226A (en) * 1968-02-20 1970-03-31 Gen Electric Spark gap assembly for current limiting lightning arresters or like articles
US3515947A (en) * 1968-02-29 1970-06-02 Gen Electric Inclined arc chamber for a spark gap
US3708711A (en) * 1970-02-24 1973-01-02 Alsthom Cgee Explosion proof high voltage resistance arrester

Also Published As

Publication number Publication date
AT239896B (de) 1965-04-26
CH396181A (de) 1965-07-31

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