EP0224072A1 - Transformateur équipé d'un dispositif de sécurité - Google Patents

Transformateur équipé d'un dispositif de sécurité Download PDF

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Publication number
EP0224072A1
EP0224072A1 EP86115158A EP86115158A EP0224072A1 EP 0224072 A1 EP0224072 A1 EP 0224072A1 EP 86115158 A EP86115158 A EP 86115158A EP 86115158 A EP86115158 A EP 86115158A EP 0224072 A1 EP0224072 A1 EP 0224072A1
Authority
EP
European Patent Office
Prior art keywords
fuse
transformer
bushings
voltage bushing
voltage
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.)
Granted
Application number
EP86115158A
Other languages
German (de)
English (en)
Other versions
EP0224072B1 (fr
Inventor
Friedrich Dipl.-Ing. Alber
Gerhard Dipl.-Ing. Altmann
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
Transformatoren Union AG
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 Transformatoren Union AG, Siemens AG filed Critical Transformatoren Union AG
Priority to AT86115158T priority Critical patent/ATE54773T1/de
Publication of EP0224072A1 publication Critical patent/EP0224072A1/fr
Application granted granted Critical
Publication of EP0224072B1 publication Critical patent/EP0224072B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H01F2027/404—Protective devices specially adapted for fluid filled transformers

Definitions

  • the invention relates to a transformer with a safety device for switching off electrical faults occurring within an oil-filled transformer tank with a special type of fuse between each of the high-voltage bushings and the respectively associated winding connection point.
  • Faults in the interior of transformers have so far usually been switched off by elements arranged outside the transformer, such as fuses in combination with a disconnector. These elements are air-cooled and can lose their switch-off capacity in whole or in part after long-term exposure to multiple times the nominal current due to overheating. In the worst case, these fuses can even explode when triggered.
  • I k -interrupters there, have a defined characteristic curve, are suitable for installation under oil and are adjusted so that they only respond selectively to internal transformer faults. In the case of such internal faults, it can happen that an arc arising in the winding area in the course of the energy flow direction also in the area before the fuse Can gain a foothold, so that the full mains short-circuit power is then implemented in the transformer tank, bypassing the built-in fuse.
  • the invention is therefore based on the object to arrange and install these special type of fuses in the oil-filled transformer to be protected in such a way that short-circuit arcs of high power are reliably excluded when internal faults occur within the transformer tank.
  • this object is achieved in a transformer of the type mentioned at the outset in that the distance between the end of the fuse which is connected to the high-voltage bushing and the high-voltage bushing is less than half the length of the fuse and that all conductor sections between the inside of each of the high-voltage bushings and the fuse are free of arcing are executed.
  • these conductor sections are encased by corresponding pieces of shrink tube or / and the fuse has a shield made of insulating material that opens in the direction of the overvoltage bushing.
  • Screw bolts 2 are fastened, for example by welding, to a Kesael lid of a transformer with a cover wall 1, which is shown in sections. These bolts 2 pass through a metal flange 3 of a high-voltage bushing, which is pressed against the cover wall 1 by washers 4 and nuts 5 and clamps a sealing ring 6.
  • the metal flange 3 carries in casting grooves 7 an upper cast resin sleeve 8 and a lower cast resin sleeve 9 and on the inner wall of a central opening a sealing ring 10 made of permanently elastic plastic.
  • the cast resin sleeves 8 and 9 together with the sealing ring 10 form a straight shaft with a circular cross section for receiving an insertable conductor pin 11.
  • the upper cast resin sleeve 8 is provided in the usual way with a bead 12 to extend the creepage distance.
  • the lower end of the conductor bolt 11 is galvanically connected to the upper end of a fuse 13, the lower end of which is in turn galvanically connected to a winding lead 14.
  • the fuse 13 is designed as a so-called I k interrupter and is suitable for installation in an oil volume.
  • the installation of the I k -interrupter in the oil volume results in a very good and even cooling of the same in addition to the insulation, thereby increasing its operational safety, especially when exposed to long-term currents above the nominal current.
  • the fuse is tuned so that it only responds selectively to electrical faults on or in the active part, i.e. inside the transformer.
  • the distance between the lower cast resin sleeve 9 and the fuse 13 is less than half its length, so that a screen 16 carried by this part of the fuse 13 via a sleeve 15 at least the point of exit of the conductor pin 11 from the cast resin sleeve 9 against the free space below shields the top wall 1.
  • the sleeve 15 and the screen 16 are made of laolierwerkstoff and therefore have a relatively large thermal resistance. For this reason, in order to improve the dissipation of heat from the fuse 13, it is advantageous to arrange a fuse wire (not shown) held therein, entirely or essentially below the sleeve 15.
  • the shield 16 made of insulating material reliably prevents an active element from being shown Part of the transformer rising arc can find a base on the part of the conductor bolt 11 lying in front of the fuse 13. In the event that parts of the conductor pin 11 or connected to it bare metallic parts for design or other reasons can not be fully covered by the screen 16, these parts are covered in a manner not shown with insulating layers, for example in shrink tube technology.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Fuses (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Discharge Heating (AREA)
EP86115158A 1985-11-15 1986-10-31 Transformateur équipé d'un dispositif de sécurité Expired - Lifetime EP0224072B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86115158T ATE54773T1 (de) 1985-11-15 1986-10-31 Transformator mit sicherungseinrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853540637 DE3540637A1 (de) 1985-11-15 1985-11-15 Transformator mit sicherungseinrichtung
DE3540637 1985-11-15

Publications (2)

Publication Number Publication Date
EP0224072A1 true EP0224072A1 (fr) 1987-06-03
EP0224072B1 EP0224072B1 (fr) 1990-07-18

Family

ID=6286123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115158A Expired - Lifetime EP0224072B1 (fr) 1985-11-15 1986-10-31 Transformateur équipé d'un dispositif de sécurité

Country Status (5)

Country Link
EP (1) EP0224072B1 (fr)
AT (1) ATE54773T1 (fr)
BR (1) BR8605622A (fr)
DE (2) DE3540637A1 (fr)
PT (1) PT83738B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0383988A1 (fr) * 1989-02-20 1990-08-29 Siemens Aktiengesellschaft Passage à haut voltage pour appareils électriques réfrigérés à l'huile
EP0678879A1 (fr) * 1994-04-21 1995-10-25 Pioch S.A. Passe-tige, notamment pour transformateur

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE827668C (de) * 1948-10-02 1952-01-10 Siemens Schuckertwerke A G Hochspannungsoelklemme fuer elektrische Geraete
US3474374A (en) * 1966-09-19 1969-10-21 Westinghouse Electric Corp Protective link for a transformer or such like device enclosed within a tank
US3710002A (en) * 1971-06-09 1973-01-09 E Link An under-ground vented non-metallic transformer assembly
DE2623156A1 (de) * 1976-05-22 1977-12-01 Transformatoren Union Ag Elektrische durchfuehrung mit giessharzstuetzer und metallbefestigungsflansch
FR2545641A1 (fr) * 1983-05-04 1984-11-09 Pioch Rene Passe-barre a barre flottante destine aux sorties de transformateur
EP0140269A1 (fr) * 1983-10-18 1985-05-08 LES CABLES DE LYON Société anonyme dite: Montage d'extremite pour cable electrique haute tension
EP0167641A1 (fr) * 1984-07-03 1986-01-15 H. Weidmann AG Procédé de fabrication d'une fermeture étanche au gaz et à l'huile pour une construction de transformateur, et fermeture ainsi réalisée

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE827668C (de) * 1948-10-02 1952-01-10 Siemens Schuckertwerke A G Hochspannungsoelklemme fuer elektrische Geraete
US3474374A (en) * 1966-09-19 1969-10-21 Westinghouse Electric Corp Protective link for a transformer or such like device enclosed within a tank
US3710002A (en) * 1971-06-09 1973-01-09 E Link An under-ground vented non-metallic transformer assembly
DE2623156A1 (de) * 1976-05-22 1977-12-01 Transformatoren Union Ag Elektrische durchfuehrung mit giessharzstuetzer und metallbefestigungsflansch
FR2545641A1 (fr) * 1983-05-04 1984-11-09 Pioch Rene Passe-barre a barre flottante destine aux sorties de transformateur
EP0140269A1 (fr) * 1983-10-18 1985-05-08 LES CABLES DE LYON Société anonyme dite: Montage d'extremite pour cable electrique haute tension
EP0167641A1 (fr) * 1984-07-03 1986-01-15 H. Weidmann AG Procédé de fabrication d'une fermeture étanche au gaz et à l'huile pour une construction de transformateur, et fermeture ainsi réalisée

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0383988A1 (fr) * 1989-02-20 1990-08-29 Siemens Aktiengesellschaft Passage à haut voltage pour appareils électriques réfrigérés à l'huile
EP0678879A1 (fr) * 1994-04-21 1995-10-25 Pioch S.A. Passe-tige, notamment pour transformateur

Also Published As

Publication number Publication date
ATE54773T1 (de) 1990-08-15
PT83738A (de) 1986-12-01
PT83738B (pt) 1993-01-29
DE3672767D1 (de) 1990-08-23
DE3540637A1 (de) 1987-05-21
EP0224072B1 (fr) 1990-07-18
BR8605622A (pt) 1987-08-18

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