GB877694A - Improvements relating to protective devices for electrical equipment - Google Patents

Improvements relating to protective devices for electrical equipment

Info

Publication number
GB877694A
GB877694A GB3342858A GB3342858A GB877694A GB 877694 A GB877694 A GB 877694A GB 3342858 A GB3342858 A GB 3342858A GB 3342858 A GB3342858 A GB 3342858A GB 877694 A GB877694 A GB 877694A
Authority
GB
United Kingdom
Prior art keywords
permittivity
protective devices
spark
oct
variable
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
GB3342858A
Inventor
Alan David Miller
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB3342858A priority Critical patent/GB877694A/en
Publication of GB877694A publication Critical patent/GB877694A/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
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/16—Overvoltage arresters using spark gaps having a plurality of gaps arranged in series
    • H01T4/20—Arrangements for improving potential distribution

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

877,694. Protective devices. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Oct. 12, 1959 [Oct. 20, 1958], No. 33428/58. Class 38 (4). [Also in Group XXXVI] A spark-gap device for a lightning arrester or the like comprises indented disc electrodes 3 spaced apart by a dielectric member 5, having a permittivity variable with frequency, and if desired an electrically conductive member 6. The device may be assembled in series with a similar device in which the spacing member 7 is of constant permittivity. Alternatively, the assembly may comprise more than one of both types of device. The variable permittivity dielectric is of a substance whose permittivity decreases by about 30% over a frequency range of from 50 c.p.s. to 10<SP>6</SP> c.p.s. The thicknesses of the members 5, 7 are such that the interelectrode capacities of the spark-gaps 1, 2 are the same.
GB3342858A 1958-10-20 1958-10-20 Improvements relating to protective devices for electrical equipment Expired GB877694A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3342858A GB877694A (en) 1958-10-20 1958-10-20 Improvements relating to protective devices for electrical equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3342858A GB877694A (en) 1958-10-20 1958-10-20 Improvements relating to protective devices for electrical equipment

Publications (1)

Publication Number Publication Date
GB877694A true GB877694A (en) 1961-09-20

Family

ID=10352830

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3342858A Expired GB877694A (en) 1958-10-20 1958-10-20 Improvements relating to protective devices for electrical equipment

Country Status (1)

Country Link
GB (1) GB877694A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0600222A1 (en) * 1992-11-28 1994-06-08 Dehn + Söhne Gmbh + Co. Kg Lightning-current withstand device with at least two series-connected surge gaps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0600222A1 (en) * 1992-11-28 1994-06-08 Dehn + Söhne Gmbh + Co. Kg Lightning-current withstand device with at least two series-connected surge gaps

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