EP0275983A1 - Mittelspannungsschaltvorrichtung für hohe Gleichströme - Google Patents

Mittelspannungsschaltvorrichtung für hohe Gleichströme Download PDF

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Publication number
EP0275983A1
EP0275983A1 EP88100700A EP88100700A EP0275983A1 EP 0275983 A1 EP0275983 A1 EP 0275983A1 EP 88100700 A EP88100700 A EP 88100700A EP 88100700 A EP88100700 A EP 88100700A EP 0275983 A1 EP0275983 A1 EP 0275983A1
Authority
EP
European Patent Office
Prior art keywords
contacts
passages
refrigerant
condenser
supplying
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
EP88100700A
Other languages
English (en)
French (fr)
Other versions
EP0275983B1 (de
Inventor
Jean-Yves Blanchard
André Orcesi
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.)
Alstom Holdings SA
Original Assignee
Alstom SA
GEC Alsthom SA
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 Alstom SA, GEC Alsthom SA filed Critical Alstom SA
Publication of EP0275983A1 publication Critical patent/EP0275983A1/de
Application granted granted Critical
Publication of EP0275983B1 publication Critical patent/EP0275983B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/62—Heating or cooling of contacts
    • 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
    • H01H33/002—Very heavy-current switches

Definitions

  • the present invention relates to a medium voltage switching device for high intensity direct current, comprising a fixed contact and a movable contact, each provided with an internal passage for circulation of a coolant, and current leads to these contacts. .
  • Document DE-A-2 303550 describes a selector for an inductive transformer or ballast, the contacts of which are cooled by a circulation of refrigerant, traveling through a closed circuit comprising a circulation pump and a cooling exchanger.
  • this refrigerant remains constantly in the liquid phase, so that its capacity for cooling the contacts is limited.
  • the rapid opening of switching devices with fixed contact and movable contact does not pose any particular difficulty when the currents which cross them are of intensity less than a thousand amperes.
  • the intensities are higher, the masses in movement increase with the intensity and require, for a given opening speed, to increase the opening forces correspondingly, which poses mechanical resistance problems.
  • the width of the movable contact, as well as the volume of the interrupting chamber which contains it, increases. There are then great difficulties, even impossiblitiés to cut certain currents.
  • the object of the present invention is to provide a medium-voltage switching device for high-intensity direct current which makes it possible to ensure good cooling of the contacts, and therefore to reduce their dimensions, without however resorting to an auxiliary source of energy.
  • the breaking device is characterized in that its coolant is vaporizable, and in that it further comprises at least one free-air air condenser, conduits for supplying the partially vaporized coolant from the passages through the contacts to the condenser, and conduits for '' Recondensed refrigerant to the passages through the contacts.
  • It also preferably meets at least one of the following characteristics: - It further comprises a reservoir for the recondensed refrigerant liquid in the condenser, at least one conduit for supplying the recondensed refrigerant from the condenser to the recipe reservoir, and the conduits for supplying the recondensed refrigerant to the passages through the contacts leave of the recipe tank.
  • the air condensers are fitted with vertical chimneys for evacuating the heated air in indirect heat exchange with the partially vaporized refrigerant.
  • the conduits for supplying the coolant to the circulation passages through the contacts to the condenser, and for supplying the recondensed coolant to the passages through the contacts are made of flexible heat-resistant plastic.
  • the diameters of the passages through the contacts are large enough to avoid any phenomenon of the cooling of the liquid refrigerant.
  • the cooling of the contacts is therefore ensured by the change of liquid-vapor state of the refrigerant.
  • This type of device is particularly interesting when the contacts are contained in a vacuum envelope, which makes it possible to increase the performance of the contacts.
  • the device consists of a fixed contact 1 and a mobile contact 2.
  • the position of the mobile contact when the contacts are opened is shown in phantom in 2A.
  • the current inputs and outputs are made up of connections 3 and 4 and braids 5 and 6.
  • the contacts are pierced with coolant passage bores 7.8.
  • the diameter of these bores is sufficient to avoid the phenomena of heat build-up of the refrigerant.
  • the latter is for example trichloro-trifluoroethane.
  • the cooling circuit comprises two condensers 9, 10, surmounted by chimneys 18, 19 activating the vertical flow of refrigeration air ensuring the condensation of the partially vaporized refrigerant during its circulation through the passages 7, 8 passing through the contacts.
  • supply conduits 11, 12 made of polytetrafluoroethylene, a flexible and heat-resistant plastic material.
  • separators 13, 14 make it possible to separate the non-vaporized refrigerant, which is returned by conduits 15, 16 to its recipe reservoir 17, from the refrigerant in the vapor state.
  • the refrigerant condenses in indirect heat exchange with the ambient air, which is evacuated via the chimneys 18, 19, and returns via the conduits 20, 21 to the liquid refrigerant recipe reservoir 17. The position of this tank is low enough to avoid a significant hydrostatic overpressure.
  • conduits 22, then 23, 24 bring the coolant back to the passages through the contacts.
  • the same contacts provided with a cooling device according to the invention, can allow the passage of a double current, ie 6000 amperes, by evacuating a calorific power of 800 watts and by heating only 50 ° C.

Landscapes

  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
EP19880100700 1987-01-21 1988-01-19 Mittelspannungsschaltvorrichtung für hohe Gleichströme Expired - Lifetime EP0275983B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8700651A FR2609836A1 (fr) 1987-01-21 1987-01-21 Appareil de coupure en moyenne tension pour courant continu de forte intensite
FR8700651 1987-01-21

Publications (2)

Publication Number Publication Date
EP0275983A1 true EP0275983A1 (de) 1988-07-27
EP0275983B1 EP0275983B1 (de) 1993-03-10

Family

ID=9347109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880100700 Expired - Lifetime EP0275983B1 (de) 1987-01-21 1988-01-19 Mittelspannungsschaltvorrichtung für hohe Gleichströme

Country Status (3)

Country Link
EP (1) EP0275983B1 (de)
DE (1) DE3878936T2 (de)
FR (1) FR2609836A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011110166U1 (de) * 2011-02-18 2013-01-18 Schneider Electric Sachsenwerk Gmbh Kühivorrichtung für eine elektrische Schaltanlage insbesondere derMittel- und Hochspannungstechnik
US9918406B2 (en) 2016-07-12 2018-03-13 Hamilton Sundstrand Corporation Mounting arrangements for electrical contactors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB241284A (en) * 1924-07-17 1925-10-19 Budd Edward G Mfg Co Improvements in electric switches
FR928556A (fr) * 1946-05-02 1947-12-02 Alsthom Cgee Perfectionnement aux interrupteurs et connecteurs électriques à coupure non protégée contre les intempéries, notamment à ceux de ces appareils qui doivent pouvoir fonctionner rapidement
DE1441797A1 (de) * 1963-12-02 1969-05-08 Philips Nv Wassergekuehlter Schleifkontakt fuer hohe Stromstaerke
DE2303550A1 (de) * 1973-01-25 1974-08-01 Transformatoren Union Ag Waehler oder umsteller fuer transformatoren, drosselspulen und dgl

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB241284A (en) * 1924-07-17 1925-10-19 Budd Edward G Mfg Co Improvements in electric switches
FR928556A (fr) * 1946-05-02 1947-12-02 Alsthom Cgee Perfectionnement aux interrupteurs et connecteurs électriques à coupure non protégée contre les intempéries, notamment à ceux de ces appareils qui doivent pouvoir fonctionner rapidement
DE1441797A1 (de) * 1963-12-02 1969-05-08 Philips Nv Wassergekuehlter Schleifkontakt fuer hohe Stromstaerke
DE2303550A1 (de) * 1973-01-25 1974-08-01 Transformatoren Union Ag Waehler oder umsteller fuer transformatoren, drosselspulen und dgl

Also Published As

Publication number Publication date
FR2609836A1 (fr) 1988-07-22
DE3878936D1 (de) 1993-04-15
DE3878936T2 (de) 1993-06-17
EP0275983B1 (de) 1993-03-10

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