EP0788126A1 - Switch for high-voltage electric current - Google Patents

Switch for high-voltage electric current Download PDF

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Publication number
EP0788126A1
EP0788126A1 EP97101453A EP97101453A EP0788126A1 EP 0788126 A1 EP0788126 A1 EP 0788126A1 EP 97101453 A EP97101453 A EP 97101453A EP 97101453 A EP97101453 A EP 97101453A EP 0788126 A1 EP0788126 A1 EP 0788126A1
Authority
EP
European Patent Office
Prior art keywords
spring
moving contact
switch
actuation
actuation rod
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Withdrawn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
EP97101453A
Other languages
German (de)
English (en)
French (fr)
Inventor
Paolo Ernesto Crippa
Alessio Frongillo
Enrico Elli
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.)
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
Original Assignee
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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 ABB Research Ltd Switzerland, ABB Research Ltd Sweden filed Critical ABB Research Ltd Switzerland
Publication of EP0788126A1 publication Critical patent/EP0788126A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/40—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/42—Driving mechanisms

Definitions

  • the present invention relates to a switch for high-voltage electric currents.
  • Switches for high-voltage electric currents are generally supported by a frame that rests on the floor.
  • a column-shaped insulator generally made of ceramic material, is provided at the free end of the frame.
  • a switching mechanism constituted by a fixed contact and by a moving contact.
  • the upper end of the insulator column has a tap for the supply of electric current, whilst a current distribution tap is provided approximately at the center of the insulator.
  • the fixed contacts can be made to engage and disengage moving contacts which are operatively connected to an actuation rod made of insulating material which runs from the moving contacts to the lower end of the column, where a small housing is usually provided, having a conventional mechanism for the actuation of the insulating rod, which is actuated by a pre-loaded spring made of steel and therefore conducting electricity and allows to quickly disengage the fixed contact and the moving contact from each other, which disengagement must occur in the shortest possible time.
  • a principal aim of the invention is to obviate the drawbacks arising from the use of conventional mechanisms for actuating the actuation rod of the moving contact during switch opening, providing for elastic means which are lighter and can also be provided as close as possible to the moving contact, in order to make the maximum amount of kinetic energy available during switch opening.
  • a switch having a fixed contact and a moving contact which can be actuated with the aid of an actuation rod, characterized in that, immediately proximate to the fixed contact and to the moving contact, the actuation rod, which is operatively connected to the moving contact, has a spring that rests with one end against a plate which is rigidly coupled to the actuation rod and with the other end against a support that is rigidly coupled to the body of the insulator.
  • the switch according to the present invention is constituted by a column-shaped insulator 2 provided, in a downward region, with a conventional actuation mechanism 3 which is connected to an actuation stem 8.
  • the insulator 2 is provided with a current supply tap 4, and approximately at the center of the body of the insulator 2 there is provided an electric current distribution tap 5.
  • the upper electric current tap 4 is electrically connected to a fixed contact 6 provided inside a switching chamber 7.
  • the chamber 7 is crossed by an actuation stem 8 made of insulating material and having a moving contact 9 at the end directed towards the fixed contact 6.
  • the moving contact 9 is electrically connected to the tap 5.
  • the actuation stem 8 is connected to the conventional actuation mechanism 3 having conventional lever systems that allow to move the stem 8.
  • the actuation stem 8 has, at a distance from the actuation mechanism 3, a washer or disk 15 that is rigidly coupled to the rod 8, the tap 5 also forming, inside the chamber 7, a support 5a which is crossed by the actuation rod 8.
  • a spring 16 advantageously a helical spring, is provided between the support 5a and the washer 15.
  • the spring 16 is provided as a helical spring made of non-conducting synthetic material.
  • glass fibers which have excellent electrical insulation characteristics, for the production of the spring 16 has proved itself highly advantageous.
  • the glass fibers are coated and impregnated with a resin, advantageously an epoxy resin, which also has excellent electrical insulation characteristics.
  • the resulting strand of fiber and resin is then wrapped around a core having a chosen diameter in order to thus provide the body of the spring; the body is then stabilized in its final position, for example by means of a heat treatment of the strand that constitutes the spring, for example in an oven.
  • the actuation spring was made of steel and therefore constituted an electrically conducting element, had a weight of approximately 900 grams, and had to be installed immediately proximate to the bottom of the insulator.
  • the use of a spring made of synthetic material, advantageously polymeric material allows to provide an electrically insulating spring.
  • the weight of the spring can be reduced to approximately 300 grams and it has also become possible to install the spring inside the insulator, proximate to the fixed contact and to the moving contact, avoiding an undesirable waste of the energy stored by the spring, the energy being almost entirely available for the contact opening step.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Push-Button Switches (AREA)
  • Relay Circuits (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
EP97101453A 1996-02-02 1997-01-30 Switch for high-voltage electric current Withdrawn EP0788126A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI960188 1996-02-02
IT96MI000188A IT1282078B1 (it) 1996-02-02 1996-02-02 Interruttore per corrente ad alta tensione

Publications (1)

Publication Number Publication Date
EP0788126A1 true EP0788126A1 (en) 1997-08-06

Family

ID=11373116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97101453A Withdrawn EP0788126A1 (en) 1996-02-02 1997-01-30 Switch for high-voltage electric current

Country Status (3)

Country Link
EP (1) EP0788126A1 (enrdf_load_stackoverflow)
HU (1) HUP9700305A3 (enrdf_load_stackoverflow)
IT (1) IT1282078B1 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924728A3 (en) * 1997-12-17 2001-03-28 ABB ADDA S.p.A. High-voltage circuit breaker for high currents
WO2008046823A1 (fr) * 2006-10-18 2008-04-24 Areva T & D Sa Dispositif de commande d'un appareillage electrique
RU2419910C1 (ru) * 2010-03-04 2011-05-27 Открытое акционерное общество Научно-исследовательский и проектно-конструкторский институт высоковольтного аппаратостроения (ОАО "НИИВА") Колонковый высоковольтный выключатель
RU2609567C1 (ru) * 2015-11-18 2017-02-02 Закрытое акционерное общество "Завод электротехнического оборудования" (ЗАО "ЗЭТО") Высоковольтный выключатель
EP3742464A1 (en) 2019-05-22 2020-11-25 ABB Schweiz AG High-current contact system
US10910177B2 (en) * 2018-11-28 2021-02-02 Xuji (Xiamen) Intelligent Switchgear Manufacturing Co., Ltd. Knife switch

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129307A (en) * 1960-04-13 1964-04-14 Vargas Jose Munoz De Device for accelerating the disconnection of electric switches and for extinguishing their arc
US4535208A (en) * 1983-01-25 1985-08-13 Sprecher & Schuh Ag Actuating device for a high-voltage switch
FR2589001A1 (fr) * 1985-10-23 1987-04-24 Alsthom Dispositif de manoeuvre d'un disjoncteur et disjoncteur muni de ce dispositif

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3129307A (en) * 1960-04-13 1964-04-14 Vargas Jose Munoz De Device for accelerating the disconnection of electric switches and for extinguishing their arc
US4535208A (en) * 1983-01-25 1985-08-13 Sprecher & Schuh Ag Actuating device for a high-voltage switch
FR2589001A1 (fr) * 1985-10-23 1987-04-24 Alsthom Dispositif de manoeuvre d'un disjoncteur et disjoncteur muni de ce dispositif

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924728A3 (en) * 1997-12-17 2001-03-28 ABB ADDA S.p.A. High-voltage circuit breaker for high currents
WO2008046823A1 (fr) * 2006-10-18 2008-04-24 Areva T & D Sa Dispositif de commande d'un appareillage electrique
FR2907596A1 (fr) * 2006-10-18 2008-04-25 Areva T & D Sa Dispositif de commande d'un appareillage electrique
US8309871B2 (en) 2006-10-18 2012-11-13 Areva T&D Sa Apparatus for controlling electrical switchgear
RU2419910C1 (ru) * 2010-03-04 2011-05-27 Открытое акционерное общество Научно-исследовательский и проектно-конструкторский институт высоковольтного аппаратостроения (ОАО "НИИВА") Колонковый высоковольтный выключатель
RU2609567C1 (ru) * 2015-11-18 2017-02-02 Закрытое акционерное общество "Завод электротехнического оборудования" (ЗАО "ЗЭТО") Высоковольтный выключатель
US10910177B2 (en) * 2018-11-28 2021-02-02 Xuji (Xiamen) Intelligent Switchgear Manufacturing Co., Ltd. Knife switch
EP3742464A1 (en) 2019-05-22 2020-11-25 ABB Schweiz AG High-current contact system

Also Published As

Publication number Publication date
HU9700305D0 (en) 1997-03-28
ITMI960188A0 (enrdf_load_stackoverflow) 1996-02-02
ITMI960188A1 (it) 1997-08-02
HUP9700305A2 (hu) 1998-01-28
IT1282078B1 (it) 1998-03-09
HUP9700305A3 (en) 1999-10-28

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