EP0848467A1 - Dérivateur de surtensions - Google Patents

Dérivateur de surtensions Download PDF

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Publication number
EP0848467A1
EP0848467A1 EP97120689A EP97120689A EP0848467A1 EP 0848467 A1 EP0848467 A1 EP 0848467A1 EP 97120689 A EP97120689 A EP 97120689A EP 97120689 A EP97120689 A EP 97120689A EP 0848467 A1 EP0848467 A1 EP 0848467A1
Authority
EP
European Patent Office
Prior art keywords
surge arrester
ceramic insulator
electrodes
electrode
contact area
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Withdrawn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
EP97120689A
Other languages
German (de)
English (en)
Inventor
Angel Alvarez
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.)
Cerberus AG
Original Assignee
Cerberus 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
Priority claimed from EP96119584A external-priority patent/EP0847118A1/fr
Application filed by Cerberus AG filed Critical Cerberus AG
Priority to EP97120689A priority Critical patent/EP0848467A1/fr
Publication of EP0848467A1 publication Critical patent/EP0848467A1/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Withdrawn legal-status Critical Current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
    • H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure

Definitions

  • a second preferred embodiment of the surge arrester according to the invention is characterized in that the diameter of the ceramic insulator is smaller than the diameter of the electrodes and that the melting body is dimensioned so that it only slightly protrudes from the electrodes.
  • This embodiment has the advantage that the short-circuit element from the surge arrester practically no longer protrudes sideways and the compactness of the surge arrester not affected.
  • a third preferred embodiment of the surge arrester according to the invention is characterized in that the contact area or the contact areas by a uniform, the respective end face and the adjoining edge zone of the outer surface of the ceramic insulator covering, metallization layer is formed or are.
  • This embodiment has the advantage that the for soldering the electrodes on the Ceramic insulator required metallization and the contact areas on the outer surface of the ceramic insulator can be applied in one operation. Moreover the electrical conductivity is optimized through the continuous metallization.
  • the two-pole surge arrester 1 shown in FIGS. 1 and 2 consists of a tubular ceramic insulator 2, both ends of which are connected by two metal electrodes 3, 4 are sealed gas-tight by means of high-temperature soldering.
  • the one formed by it Gas discharge space is filled with an inert gas, such as argon or neon.
  • a short-circuit element 5 is provided on one end face of the ceramic insulator 2, to establish a galvanic connection between the two metal electrodes 3, 4 is used when the surge arrester 1 is overloaded.
  • the short-circuit element 5 consists of a spring 6 made of copper beryllium or another suitable material, one end of which is connected to the electrode 4 connected, preferably welded to it, and the other end of an insulating body 7 made of polypropylene and this in the area in front of the electrode 3 presses against the ceramic insulator 2 from the outside.
  • the ceramic insulator 2 is on his Each end with a conductor connected to the respective electrode 3, 4 and in the Figures provided with a hatched contact area 8 and 9, respectively Insulating melting body 7 at the contact area 8 connected to the electrode 3 is present.
  • the contact areas 8, 9 are through the respective end face and the adjoining edge zone of the outer surface of the ceramic insulator 2 covering metallization layer educated.
  • the metallization layer consists of an outer layer made of nickel and an inner layer to create a permanent connection between the nickel layer and the ceramic insulator 2.
  • the inner layer is preferred by a molybdenum-manganese compound or another suitable material or a suitable alloy is formed.
  • the surge arrester 1 works in such a way that, in the normal case, between the electrodes 3 and 4 there is no electrical connection.
  • overvoltage conditions occur takes place in the gas discharge space inside the ceramic insulator 2 between the Electrodes 3 and 4 take a gas discharge, causing the overvoltage to settle for one protective system is reduced to a safe level. If the surge conditions if the surge arrester 2 heats up so much, that the insulating melting body 7 softens and the spring 6 in conductive connection with the Contact area 8 device, and the electrodes 3 and 4 are electrically connected.
  • the three-pole surge arrester 10 shown in FIG. 3 consists of a middle one Electrode 11, two external electrodes 12, two ceramic insulators 2 with contact areas 8 and 9 and a short-circuit element 13, which is used to produce a galvanic connection between the outer electrodes 12 and the middle electrode 11.
  • the Short-circuit element 13 consists of a welded to the middle electrode 11 Spring 6 ', the two ends of which each carry an insulating melting body 7, each of which abuts the contact area 8 conductively connected to the associated outer electrode 12.
  • the materials of the electrodes 11 and 12, the spring 6 'and the insulating melting body 7 are the same as in the two-pole surge arrester shown in FIGS. 1 and 2 1. The same applies to the contact areas 8 and 9 for the two-pole Surge arrester 1 said.
  • the diameter of the ceramic insulators 2 is smaller than the diameter of electrodes 11 and 12, so that the insulating body 7 the edge of the electrodes tower at most slightly.
  • the short-circuit element 13 lies very much close to the ceramic insulators 2 and affects the compactness of the surge arrester 10 practically not.
  • Surge arrester 1 is advantageous if the diameter of the ceramic insulator 2 is smaller is than that of the electrodes 3 and 4, and when the insulating body 7 is the Electrodes slightly above the surface at most.

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  • Fuses (AREA)
EP97120689A 1996-12-06 1997-11-26 Dérivateur de surtensions Withdrawn EP0848467A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97120689A EP0848467A1 (fr) 1996-12-06 1997-11-26 Dérivateur de surtensions

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP96119584 1996-12-06
EP96119584A EP0847118A1 (fr) 1996-12-06 1996-12-06 Dérivateur de surtensions
EP97120689A EP0848467A1 (fr) 1996-12-06 1997-11-26 Dérivateur de surtensions

Publications (1)

Publication Number Publication Date
EP0848467A1 true EP0848467A1 (fr) 1998-06-17

Family

ID=26142348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97120689A Withdrawn EP0848467A1 (fr) 1996-12-06 1997-11-26 Dérivateur de surtensions

Country Status (1)

Country Link
EP (1) EP0848467A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034326A (en) * 1975-04-17 1977-07-05 Comtelco (U.K.) Limited Temperature sensitive trip device
DE3146787A1 (de) * 1981-11-25 1983-06-01 Siemens AG, 1000 Berlin und 8000 München Ueberspannungsableiter mit aeusserer kurzschlussstrecke
WO1988008634A1 (fr) * 1987-05-01 1988-11-03 Cooper (U.K.) Limited Parasurtension a gaz
FR2625377A1 (fr) * 1987-12-23 1989-06-30 Pendar Sarl Parafoudre de surete
EP0548587A1 (fr) * 1991-12-24 1993-06-30 Cerberus Ag Dispositif de protection contre les surtensions

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034326A (en) * 1975-04-17 1977-07-05 Comtelco (U.K.) Limited Temperature sensitive trip device
DE3146787A1 (de) * 1981-11-25 1983-06-01 Siemens AG, 1000 Berlin und 8000 München Ueberspannungsableiter mit aeusserer kurzschlussstrecke
WO1988008634A1 (fr) * 1987-05-01 1988-11-03 Cooper (U.K.) Limited Parasurtension a gaz
FR2625377A1 (fr) * 1987-12-23 1989-06-30 Pendar Sarl Parafoudre de surete
EP0548587A1 (fr) * 1991-12-24 1993-06-30 Cerberus Ag Dispositif de protection contre les surtensions

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