GB1411492A - Excess voltage arresters - Google Patents

Excess voltage arresters

Info

Publication number
GB1411492A
GB1411492A GB1413873A GB1413873A GB1411492A GB 1411492 A GB1411492 A GB 1411492A GB 1413873 A GB1413873 A GB 1413873A GB 1413873 A GB1413873 A GB 1413873A GB 1411492 A GB1411492 A GB 1411492A
Authority
GB
United Kingdom
Prior art keywords
electrode
sleeves
sections
gap
members
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
Application number
GB1413873A
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.)
MO Valve Co Ltd
Original Assignee
MO Valve Co Ltd
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 MO Valve Co Ltd filed Critical MO Valve Co Ltd
Priority to GB1413873A priority Critical patent/GB1411492A/en
Priority to DE19742413570 priority patent/DE2413570A1/en
Priority to US453322A priority patent/US3885203A/en
Priority to FR7409995A priority patent/FR2222748B3/fr
Publication of GB1411492A publication Critical patent/GB1411492A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01T1/20—Means for starting arc or facilitating ignition of spark gap
    • H01T1/22—Means for starting arc or facilitating ignition of spark gap by the shape or the composition of the electrodes

Landscapes

  • Spark Plugs (AREA)
  • Thermistors And Varistors (AREA)

Abstract

1411492 Spark gaps M-O VALVE CO Ltd 21 March 1974 [23 March 1973] 14138/73 Heading H1D A spark gap arrester as described in Specification 1,021,782 has electrodes 10, 11 in a gasfilled housing comprising end caps 1, 2, insulating sleeves 4, 5 and a central conducting portion 3, and each electrode 10, 11 carries an insulating sleeve 19, 20. Sleeves 4, 5 have metallized bands 8, 9 whereby they are brazed to end-caps 1, 2 and portion 3. Electrode 10 is made in two parts 12a, 12b, 12c and 13a, 13b, 13c of stepped construction as shown. Part 12a is brazed to end cap 1 and part 12c to part 13a. Electrode 11 is similarly constructed. The device is filled with gas, and sealed at 23, and gap 16 has the same D.C. breakdown voltage as gaps 17, 18. The ceramic sleeve 19 fits around sections 12c, 13b of electrode 10, and the corresponding sleeve 20 fits around sections 14c, 15b of electrode 11. In use, end caps 1, 2 are connected to respective lines of an electrical supply, and portion 3 is grounded. If overvoltage occurs, the gap between first one, gap between an electrode and portion 3, then the other, breaks down. During discharge, metal is sputtered on to the inner surfaces of members 4, 5, and this may reduce the breakdown voltage; but for the effect of sleeves 19, 20 by restricting sputtering on to the inner curved surfaces of members 4, 5, by restricting movement of the cathode spot of the discharge, and by increasing the distance between sputtered end surfaces 21, 22 of sleeves 19, 20 and the free surfaces of the corresponding electrodes 10, 11. An arrester with a breakdown voltage of 400 V is filled with a 10% hydrogen-argon mixture at 50 torr; the radial spacing between electrode sections 12c, 13b, 14c and 14b and the internal surfaces of members 4, 5 is 0À95 mm.; and sleeves 19, 20 consist of 98% alumina and have internal and external diameters of 2À92 and 3À98 mm. respectively. Sections 13c, 15c may be of large diameter as indicated or may be of the same diameter as sections 13b, 15b.
GB1413873A 1973-03-23 1973-03-23 Excess voltage arresters Expired GB1411492A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB1413873A GB1411492A (en) 1973-03-23 1973-03-23 Excess voltage arresters
DE19742413570 DE2413570A1 (en) 1973-03-23 1974-03-21 SURGE ARRESTERS
US453322A US3885203A (en) 1973-03-23 1974-03-21 Excess voltage arresters
FR7409995A FR2222748B3 (en) 1973-03-23 1974-03-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1413873A GB1411492A (en) 1973-03-23 1973-03-23 Excess voltage arresters

Publications (1)

Publication Number Publication Date
GB1411492A true GB1411492A (en) 1975-10-29

Family

ID=10035703

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1413873A Expired GB1411492A (en) 1973-03-23 1973-03-23 Excess voltage arresters

Country Status (2)

Country Link
US (1) US3885203A (en)
GB (1) GB1411492A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173942A (en) * 1985-03-12 1986-10-22 Dubilier Beswick Div Surge voltage arrestors

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056753A (en) * 1976-02-13 1977-11-01 Kabushiki Kaisha Sankosha Overvoltage protecting element
DE2714122B2 (en) * 1977-03-30 1980-02-28 Siemens Ag, 1000 Berlin Und 8000 Muenchen Gas discharge surge arrester with concentric electrodes
DE4444515B4 (en) * 1994-10-13 2009-10-01 Epcos Ag Gas-filled three-electrode surge arrester for high switching capacities
CA2160521A1 (en) * 1994-10-13 1996-04-14 Juergen Boy Gas-filled, three-electrode surge arrester for high contact ratings
CA2186707A1 (en) * 1995-09-29 1997-03-30 Gerhard Lange Gas-filled overvoltage charge eliminator
DE19647748A1 (en) * 1995-11-29 1997-06-05 Siemens Ag Gas-filled overvoltage diverter/arrester for lightning protection of communications networks
DE19928322A1 (en) * 1999-06-16 2000-12-21 Siemens Ag Gas-filled surge arrester with electrode connections in the form of band-like clamps

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1021782A (en) * 1964-01-07 1966-03-09 Ass Elect Ind Improvements relating to excess voltage protectors
DE1935734A1 (en) * 1969-07-14 1971-01-28 Siemens Ag Surge arresters
DE1950090C3 (en) * 1969-10-03 1979-09-27 Siemens Ag, 1000 Berlin U. 8000 Muenchen Gas discharge tube
DE2060388B2 (en) * 1970-12-08 1977-05-26 Siemens AG, 1000 Berlin und 8000 München SURGE ARRESTER WITH MULTIPLE ELECTRODES
US3780350A (en) * 1971-12-16 1973-12-18 Gen Signal Corp Surge arrester

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173942A (en) * 1985-03-12 1986-10-22 Dubilier Beswick Div Surge voltage arrestors

Also Published As

Publication number Publication date
US3885203A (en) 1975-05-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee