EP0004351A1 - Dispositif parafoudre - Google Patents

Dispositif parafoudre Download PDF

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Publication number
EP0004351A1
EP0004351A1 EP79100798A EP79100798A EP0004351A1 EP 0004351 A1 EP0004351 A1 EP 0004351A1 EP 79100798 A EP79100798 A EP 79100798A EP 79100798 A EP79100798 A EP 79100798A EP 0004351 A1 EP0004351 A1 EP 0004351A1
Authority
EP
European Patent Office
Prior art keywords
lightning arrester
linear resistor
spark gap
linear
arrester device
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.)
Withdrawn
Application number
EP79100798A
Other languages
German (de)
English (en)
Inventor
Nobuo Nagai
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP0004351A1 publication Critical patent/EP0004351A1/fr
Withdrawn legal-status Critical Current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
    • H01T1/16—Series resistor structurally associated with spark gap
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors

Definitions

  • the present invention relates to a lightning arrester device for power transmission system which is used for protecting a power transmission line, especially a lightning arrester device utilizing non-linear resistors.
  • Such lightning arrester has no serial gap and the lightning arrester element is formed only by the non-linear resistor whereby a response to lightning voltage application can be performed without any discharge delay.
  • the system voltage AC or DC system voltage
  • the level of protection of the lightning arrester is reduced, a current passing in the normal state is increased to shorten the life of the lightning arrester. Therefore, the level of protection could disadvantageously not be reduced below a specific value.
  • FIG 1 shows an equivalent circuit diagram of the lightning arrester device of the present invention
  • Figure 2 shows a schematic view of the structure thereof.
  • the lightning arrester device of the present invention comprises a serial connection of a first non-linear resistor (1) and a second non-linear resistor (2) which are respectively prepared by sintering a composition of a main component of zinc oxide at high temperature and which have excellent non-linear resistive characteristics and a spark gap device (3) connected in parallel to the second non-linear resistor (2).
  • the first non-linear resistor (1) has a structure of piled up disc elements and the second non-linear resistor (2) has a cyrindrical structure as shown in Figure 4.
  • the spark gap device (3) is formed by cup shaped metal plates which are disposed inside of the cylindrical non-linear resistor (2). That is, the flanges of the metal plates of the . discharge gap device (3) is held by the non-linear resistor (2).
  • the limiting voltage-current characteristic curves in the case of no connection of the spark gap device (3) are given by Figure 3 (A), (B), wherein the lightning voltage (corresponding to level of protection) to nominal spark current i 2 is given by v 3'
  • the spark is formed in the spark gap of the spark gap device (3) to form a short-circuit whereby the level of protection can be reduced to v 2 in Figure 3.
  • the spark gap device (3) is set to create a spark when the current i l in the region of v 2 ⁇ v 1 is passed whereby the limiting voltage characteristic of the embodiment of Figure 1 is given as the full lines (A), (D) in Figure 3, to give the level of protection to v 2 .
  • the spark in the spark gap device (3) is stopped by diminishing the lightning voltage which releases the spark gap device (3).
  • the limiting voltage characteristic of Figure 3(A) is given in the condition applying the normal voltage to ground v 0 to the lightning arrester whereby the above-mentioned low level of protection v 2 can be given without increasing the current passing in the normal state.
  • the spark gap device is disposed inside of the cyrindrical non-linear resistor whereby an additional space for the spark gap device is not required advantageously.
  • the long trunk insulator (6) is formed in a hollow shape and the lightning arrester of the disc type first non-linear resistor (11) and the cyrindrical second non-linear resistor (12) having a same outer diameter are held in the hollow insulator whereby the lightning arrester device which can be used as supporting insulator for power transmission line can be obtained.
  • a diameter of the hollow part of the long trunk insulator (6) is preferably minimized from the economical viewpoint.
  • the spark gap device is disposed inside the second non-linear resistor whereby the diameter of the hollow part of the insulator can be minimized.
  • the reference numeral (7) designates a flange ;
  • (8) designates a metal cover which is disposed at each end of the insulator (6) to form each terminal which is electrically connected to either of the non-linear resistor (11) or (12) ;
  • (9) designates the O-ring for air-tightening ;
  • (10) designates a cement for bonding the insulator (6) to the flange (7) in one body.
  • the lightning arrester device has a simple structure and imparts low level of protection without shortening the life of the lighning arrester.
  • the number of non-linear resistors to the normal voltage can be increased whereby the duty of each non-linear resistor of the lightning arrester device in the normal operation can be reduced to prolong the life of the lightning arrester.
  • the spark gap device is disposed in the non-linear resistor, whereby a size of a container (usually an insulator) can be small when the lightning arrester elements are held in the container.
  • a size of a container usually an insulator

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP79100798A 1978-03-17 1979-03-15 Dispositif parafoudre Withdrawn EP0004351A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP31302/78 1978-03-17
JP3130278A JPS54122848A (en) 1978-03-17 1978-03-17 Lightening arrester

Publications (1)

Publication Number Publication Date
EP0004351A1 true EP0004351A1 (fr) 1979-10-03

Family

ID=12327485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79100798A Withdrawn EP0004351A1 (fr) 1978-03-17 1979-03-15 Dispositif parafoudre

Country Status (4)

Country Link
EP (1) EP0004351A1 (fr)
JP (1) JPS54122848A (fr)
BR (1) BR7901654A (fr)
ES (1) ES478747A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11322913B2 (en) * 2018-09-28 2022-05-03 Hitachi Energy Switzerland Ag Externally gapped line arrester

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5823185A (ja) * 1981-07-31 1983-02-10 株式会社日立製作所 避雷器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1098592B (de) * 1955-08-22 1961-02-02 Licentia Gmbh UEberspannungsableiter mit Loeschfunkenstrecke und spannungsabhaengigen Widerstaenden fuer hohe Spannungen
DE2647233A1 (de) * 1975-11-28 1977-06-08 Gen Electric Ueberspannungsableiter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1098592B (de) * 1955-08-22 1961-02-02 Licentia Gmbh UEberspannungsableiter mit Loeschfunkenstrecke und spannungsabhaengigen Widerstaenden fuer hohe Spannungen
DE2647233A1 (de) * 1975-11-28 1977-06-08 Gen Electric Ueberspannungsableiter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11322913B2 (en) * 2018-09-28 2022-05-03 Hitachi Energy Switzerland Ag Externally gapped line arrester

Also Published As

Publication number Publication date
ES478747A1 (es) 1979-08-01
JPS54122848A (en) 1979-09-22
BR7901654A (pt) 1979-10-16

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): CH DE FR GB IT SE

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn
RIN1 Information on inventor provided before grant (corrected)

Inventor name: NAGAI, NOBUO