EP3182436A1 - Mittelspannungsschutzschalter für unterwasseranwendungen - Google Patents

Mittelspannungsschutzschalter für unterwasseranwendungen Download PDF

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Publication number
EP3182436A1
EP3182436A1 EP15201360.3A EP15201360A EP3182436A1 EP 3182436 A1 EP3182436 A1 EP 3182436A1 EP 15201360 A EP15201360 A EP 15201360A EP 3182436 A1 EP3182436 A1 EP 3182436A1
Authority
EP
European Patent Office
Prior art keywords
housing
circuit breaker
vacuum interrupter
voltage circuit
medium 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.)
Withdrawn
Application number
EP15201360.3A
Other languages
English (en)
French (fr)
Inventor
Maik Hyrenbach
Christian Reuber
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 Schweiz AG
Original Assignee
ABB Schweiz 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 ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP15201360.3A priority Critical patent/EP3182436A1/de
Publication of EP3182436A1 publication Critical patent/EP3182436A1/de
Withdrawn legal-status Critical Current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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • 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
    • H01H33/38—Power arrangements internal to the switch for operating the driving mechanism using electromagnet

Definitions

  • the invention relates to a medium voltage circuit breaker for subsea applications, with a vacuum interrupter arranged inside a pressure housing, which is tight against environmental high pressure, and with a drive, in order to move a movable contact of the vacuum interrupter, relatively to a fixed contact of the vacuum interrupter, according to the preamble of claim 1.
  • One aspect of this invention relates to MV circuit breaker poles with vacuum interrupters operated directly by magnetic actuators operating in line with said vacuum interrupter.
  • EP 1843375 B1 and EP 2312606 B1 Such constructions are known from EP 1843375 B1 and EP 2312606 B1 .
  • Another aspect of this invention relates to dedicated switching poles for subsea application that can be used in oil at a pressure of up to 300 bar.
  • a further know voltage circuit breaker arrangement is known from EP 1942514 A1 .
  • an insulating fluid probably oil
  • a pressure that corresponds to the pressure of the surrounding water, e.g. at a depth of 3000 m the pressure will be about 300 bar.
  • Oil and water will be separated by a tank with a pressure compensation device.
  • the main point of the invention is, that the magnetic drive is separated in two parts, wherein the first part with a mechanical link to the moved contact is arranged inside of the pole housing and a second part, consisting the coil or the coils is, or are arranged outside of the pole housing, and that the coil or the coils to control the magnetic drive, are as well arranged outside of the housing.
  • the one or more coils that are needed to control the magnetic drive are outside of the housing and therefore it would not be required to use a secondary connector to guide the coil wires through the housing.
  • coils and concerning magnetic yoke parts are positioned under a bottom lid of the housing.
  • the coils and concerning magnetic yoke parts are positioned sidely near to the bottom lid of the housing.
  • the yoke parts arranged outside the housing, are fixed in a magnetic flux guiding connection to yoke parts inside the housing and that the flux guidance elements are pressuretightly sealed versus the housing.
  • the yoke parts inside the housing consist of a pungler plate, coupled to a movable stem of the movable contact of the vacuum interrupter, and that the plunger plate is attracted by poles of the yoke parts inside the housing.
  • a ferromagnetic plate is arranged on the movable stem, in order to define the stroke of the drive and to lock the position with a relatively small force to avoid that the pressure inside the housing can close the vacuum interrupter, for an end stop.
  • FIG. 1 A possible embodiment is shown in figures 1 , with status "pole is closed", and figure 2 , with status "pole is open”, as a cross-section.
  • the closing operation is initiated by an electrical current in the coil(s) 16 in the direction where its magnetic field is supporting, i.e. increasing, the magnetic field of the permanent magnet 15.
  • the OFF-plate 17 is already magnetically saturated to a certain degree, it will practically not obstruct the increase of the magnetic field between the poles 12 and the plunger 11.
  • This magnetic field will attract the plunger 11 to the poles 12, the other movable parts 9, 8 and 4 will be pushed upwards until the movable contact 4 of the vacuum interrupter will hit the fixed contact 3, the closing spring 8 is compressed and the plunger 11 is attached at the poles 12. Now the pole is closed, and the current in the coil 12 can be switched off without changing the closed position of the pole.
  • the magnetic cross section of 14 and 15 can be different from the cross section of 12 and 13 to increase the flux density from the permanent magnet, which is in the region of 1 T, so that a higher holding force of plunger 11 to the poles 12 is obtained, as this force depends on the square of the magnetic flux density. This is certainly limited by the magnetic saturation of the iron, which is in the region of 2 T. For the same reason, the faces of pole 12 that are directed to the plunger 11 have a local reduction of the magnetic cross section, here realized by chamfers.
  • Figure 3 shows a perspective view of this first embodiment.
  • the pole can be made with the ferromagnetic poles 12, but without the other external parts 13, 14, 15, 16 of the magnetic drive. These can be added later on, e.g. by screw connection with holes in 13 and internal threads in 12.
  • Terminals 5, 6 and the ferromagnetic poles 12 can have collars as shown in Figure 1 to enable the transfer of the outside pressure from 5, 6 and 12 to the pole housing 1 and to improve the sealing between 5, 6, 12 and 1.
  • An alternative to these collars is a conical shape of 5, 6 and 12, in a way that the higher diameter is at the outside of the pole housing, according to the higher pressure there.
  • Fig. 4 , 6 and 7 show a pole that is internally equivalent to the pole of the first embodiment.
  • the external parts of the magnetic drive are however arranged not below but aside of the pole housing.
  • one coil 16 and two permanent magnets 15 are being used.
  • the magnetic cross section is increased in the region of the permanent magnets.
  • Fig, 5 , 8 and 9 show a switching pole where the magnetic poles are extending through the pole housing at the same side. Also here, the magnetic cross section in the area of the permanent magnet 15 is increased.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
EP15201360.3A 2015-12-18 2015-12-18 Mittelspannungsschutzschalter für unterwasseranwendungen Withdrawn EP3182436A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15201360.3A EP3182436A1 (de) 2015-12-18 2015-12-18 Mittelspannungsschutzschalter für unterwasseranwendungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15201360.3A EP3182436A1 (de) 2015-12-18 2015-12-18 Mittelspannungsschutzschalter für unterwasseranwendungen

Publications (1)

Publication Number Publication Date
EP3182436A1 true EP3182436A1 (de) 2017-06-21

Family

ID=54850457

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15201360.3A Withdrawn EP3182436A1 (de) 2015-12-18 2015-12-18 Mittelspannungsschutzschalter für unterwasseranwendungen

Country Status (1)

Country Link
EP (1) EP3182436A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1942514A1 (de) 2007-01-04 2008-07-09 Eaton Electric B.V. Schaltvorrichtung für Hochdruckumgebungen
EP1843375B1 (de) 2006-04-05 2011-07-06 ABB Technology AG Elektromagnetischer Aktuator, insbesondere für einen Mittelspannungsschalter
EP2312606B1 (de) 2009-10-14 2013-02-27 ABB Technology AG Bistabiler magnetischer Aktuator für einen Mittelspannungsschutzschalter
EP2732455A1 (de) * 2011-09-05 2014-05-21 Siemens Aktiengesellschaft Elektromagnetischer antrieb
CN105280433A (zh) * 2015-08-05 2016-01-27 杨斌堂 自开合真空断路器装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1843375B1 (de) 2006-04-05 2011-07-06 ABB Technology AG Elektromagnetischer Aktuator, insbesondere für einen Mittelspannungsschalter
EP1942514A1 (de) 2007-01-04 2008-07-09 Eaton Electric B.V. Schaltvorrichtung für Hochdruckumgebungen
EP2312606B1 (de) 2009-10-14 2013-02-27 ABB Technology AG Bistabiler magnetischer Aktuator für einen Mittelspannungsschutzschalter
EP2732455A1 (de) * 2011-09-05 2014-05-21 Siemens Aktiengesellschaft Elektromagnetischer antrieb
CN105280433A (zh) * 2015-08-05 2016-01-27 杨斌堂 自开合真空断路器装置

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