US3803524A - Overvoltage arrester with ejectable type ground line - Google Patents

Overvoltage arrester with ejectable type ground line Download PDF

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Publication number
US3803524A
US3803524A US00196906A US19690671A US3803524A US 3803524 A US3803524 A US 3803524A US 00196906 A US00196906 A US 00196906A US 19690671 A US19690671 A US 19690671A US 3803524 A US3803524 A US 3803524A
Authority
US
United States
Prior art keywords
diaphragm
arrester
housing
overvoltage arrester
overvoltage
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
US00196906A
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English (en)
Inventor
G Schmalz
W Werner
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of US3803524A publication Critical patent/US3803524A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01T1/15—Details of spark gaps for protection against excessive pressure

Definitions

  • An overvoltage arrester has a diaphragm which seals the interior of the housing thereof and a deflection plate for gases which may escape during an overloading of the arrester, upon the rupture of the diaphragm.
  • the ground line of the arrester is affixed to the deflection plate by an ejectable resilient body constructed of cup-shaped sheet metal part and mounted in the deflection plate in operative proximity with the diaphragm.
  • the invention relates to an overvoltage or lightning arrester. More particularly, the invention relates to an overvoltage arrester with an ejectable type ground line.
  • a known type of overvoltage arrester has a diaphragm funtioning as a seal for the housing of the arrester containing the active overvoltage arresting components thereof such as, for example, spark gaps and voltage-dependent resistors.
  • the diaphragm is supposed to rupture, due to a shortcircuit, for example, when the arrester is overloaded and should thereby relieve the housing of the resulting strong pressure.
  • Such a diaphragm may be provided together with a deflection plate in order to direct or conduct the escaping gas in order to ignite a light are outside the housing of the arrester, between voltage-conducting components. The light arc relieves the arrester from conducting current.
  • This type of overvoltage arrester may further comprise a device for disconnecting the ground line. Such a device is actuated upon the rupture of the diaphragm and is described in German Published application No. 1,563,533.
  • An overvoltage arrester has a diaphragm which seals the interior of the housing of the arrester and a deflection plate for directing escaping gas.
  • the overvoltage arrester comprises an ejectable type resilient body of cup-shaped sheet metal configuration ejectably mounted in the deflection plate in operative proximity with the diaphragm for affixing a ground line to the arrestor.
  • the sheet metal resilient body it is preferable to locate the sheet metal resilient body so that its bottom faces the housing or interior of the arrester, and to position the diaphragm a slight distance above the bottom of the resilient body.
  • the diaphragm is in operative proximity with the resilient body of sheet metal over a large area or has a-large area action over said sheet metal body and can rapidly press said sheet metal body out of the deflection plate.
  • FIG- UlRE is a schematic diagram, partly cutaway and partly in section, of the lower part of an embodiment of the overvoltage arrester of the invention utilized in medium high voltage systems.
  • the housing l which may comprise ceramic material, houses a plurality of active overvoltage arresting components such as, for example, a stack of quench gap assemblies 2 which brace against contact bridges 3 and a lower support plate 4.
  • the support plate 4 is provided with holes 5 to create a passage for gases which occur during overloading of the overvoltage arrester.
  • the support plate 4 is enclosed by a ring 6 which rests upon supports 7of the deflection plate 10.
  • a diaphragm 11 is inserted between the ring 6 and the support plate 4 and seals the interior of the housing 1 from the outside.
  • the deflection plate 10 is affixed to the housing 1 by clamps, cock bolts or tripping components 13, bolts 14 and nuts 15.
  • a sealing ring 17 is placed between the diaphragm l1 and the front surface 16 of the housing 1 in order to provide a sound seal for the interior of said housing and thereby for the overvoltage arrester.
  • the deflection plate 10 has an opening 20 therein into which a resilient body 21 of cup-shaped sheet metal configuration is inserted.
  • the resilient body 21 has a bottom 22 of substantially or slightly conical configuration.
  • a socket 23 is affixed to the retracted bottom 22 of the sheet metal body 21 and functions as a terminal connecting point for a ground line 241 to the overvoltage arrester.
  • the FIGURE illustrates only a slight distance 25 between the diaphragm 11 and the bottom 22 of the sheet metal body 21. If the diaphragm 11 is pushed toward the sheet metal resilient body 21 when an over-pressure occurs in the housing 1, it exerts a force on said sheet metal body which ejects said sheet metal body from the opening 21) of the deflection plate 10. This is greatly aided by the fact that the emerging gas jet strikes the sunken bottom 22 of the resilient body 21, thereby exerting a ramming pressure against said bottom and said body. The gas which escapes during the rupture of the diaphragm 11 is directed, released or expelled through an opening 26 formed through the deflection plate 10.
  • the gas is directed in the direction of an arrow 27 and can ignite an arc in a known manner, which then relieves the overvoltage arrester.
  • the ejection or release of the ground line 24 with the ejection of the sheet metal body 21 creates a visible open ground circuit and indicates the inoperative or useless condition of the arrester.
  • the desired resiliency or spring action may be obtained with an uninterrupted edge or with an edge which is divided into resilient fingers.
  • the resiliency or springiness may also be affected, for example, by holes or slots worked into the edge of the sheet metal body 21.
  • the bottom 22 of the body 21 may also have a shape which is more or less arched instead of the conical configuration shown in the FIGURE, or may more closely resemble a flat bottom.
  • a specific depression in the direction of the escaping gas is of advantage, however.
  • a relatively small distance between the diaphragm 11 and the bottom 22 of the body 21 which permits a direct action of said diaphragm on said body, without intermediate components, is also essential.
  • An overvoltage arrester having a housing, a plurality of active overvoltage arresting components in the housing, a diaphragm sealing the interior of the housing and a deflection plate adjacent the housing for directing escaping gas, said deflection plate being located directly opposite said diaphragm at a side of said diaphragm located opposite the side at which said arrestwherein the resilient body has a bottom having a configuration which deepens in the direction of escaping gas from the housing.

Landscapes

  • Thermistors And Varistors (AREA)
  • Emergency Protection Circuit Devices (AREA)
US00196906A 1970-11-12 1971-11-09 Overvoltage arrester with ejectable type ground line Expired - Lifetime US3803524A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2056526A DE2056526C3 (de) 1970-11-12 1970-11-12 Überspannungsableiter mit einer das Innere abschließenden Membran

Publications (1)

Publication Number Publication Date
US3803524A true US3803524A (en) 1974-04-09

Family

ID=5788366

Family Applications (1)

Application Number Title Priority Date Filing Date
US00196906A Expired - Lifetime US3803524A (en) 1970-11-12 1971-11-09 Overvoltage arrester with ejectable type ground line

Country Status (5)

Country Link
US (1) US3803524A (de)
CH (1) CH524903A (de)
DE (1) DE2056526C3 (de)
GB (1) GB1334282A (de)
SE (1) SE367737B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2299752A1 (fr) * 1974-06-19 1976-08-27 Alsthom Cgee Parafoudre
US4241374A (en) * 1979-01-29 1980-12-23 Reliable Electric Company Surge voltage arrester with ventsafe feature
EP0037363A1 (de) * 1980-03-28 1981-10-07 Siemens Aktiengesellschaft Überspannungsableiter
US4734823A (en) * 1985-11-01 1988-03-29 Joslyn Corporation Fault current interrupter and explosive disconnector for surge arrester
US5502612A (en) * 1992-07-08 1996-03-26 Joslyn Manufacturing Company Secondary surge arrester with isolating and indicating features
US20140132157A1 (en) * 2011-03-18 2014-05-15 Dehn + Söhne Gmbh + Co. Kg Spark gap having a plurality of individual spark gaps connected in series and present in a stacked arrangement
US10236102B2 (en) 2014-01-22 2019-03-19 Tyco Electronics (Shanghai) Co., Ltd. Lightning arrester

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9717817D0 (en) * 1997-08-21 1997-10-29 Bowthorpe Plc Improvements relating to high voltage electric installation

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2299752A1 (fr) * 1974-06-19 1976-08-27 Alsthom Cgee Parafoudre
US4241374A (en) * 1979-01-29 1980-12-23 Reliable Electric Company Surge voltage arrester with ventsafe feature
EP0037363A1 (de) * 1980-03-28 1981-10-07 Siemens Aktiengesellschaft Überspannungsableiter
US4734823A (en) * 1985-11-01 1988-03-29 Joslyn Corporation Fault current interrupter and explosive disconnector for surge arrester
US5502612A (en) * 1992-07-08 1996-03-26 Joslyn Manufacturing Company Secondary surge arrester with isolating and indicating features
US20140132157A1 (en) * 2011-03-18 2014-05-15 Dehn + Söhne Gmbh + Co. Kg Spark gap having a plurality of individual spark gaps connected in series and present in a stacked arrangement
US9184569B2 (en) * 2011-03-18 2015-11-10 Dehn + Söhne Gmbh + Co. Kg Spark gap having a plurality of individual spark gaps connected in series and present in a stacked arrangement
US10236102B2 (en) 2014-01-22 2019-03-19 Tyco Electronics (Shanghai) Co., Ltd. Lightning arrester

Also Published As

Publication number Publication date
GB1334282A (en) 1973-10-17
DE2056526C3 (de) 1978-05-11
DE2056526B2 (de) 1975-12-04
DE2056526A1 (de) 1972-05-18
SE367737B (de) 1974-06-04
CH524903A (de) 1972-06-30

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