EP1991999B1 - Elektrisches schaltgerät - Google Patents

Elektrisches schaltgerät Download PDF

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Publication number
EP1991999B1
EP1991999B1 EP20070704621 EP07704621A EP1991999B1 EP 1991999 B1 EP1991999 B1 EP 1991999B1 EP 20070704621 EP20070704621 EP 20070704621 EP 07704621 A EP07704621 A EP 07704621A EP 1991999 B1 EP1991999 B1 EP 1991999B1
Authority
EP
European Patent Office
Prior art keywords
interrupter unit
air
switch
grounding switch
interrupter
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.)
Expired - Fee Related
Application number
EP20070704621
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1991999A1 (de
Inventor
Torsten Kuntze
Carsten Protze
Dirk SCHRÄDER
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
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 Siemens AG filed Critical Siemens AG
Publication of EP1991999A1 publication Critical patent/EP1991999A1/de
Application granted granted Critical
Publication of EP1991999B1 publication Critical patent/EP1991999B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • H01H33/126—Load break switches comprising a separate circuit breaker being operated by the distal end of a sectionalising contact arm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • 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
    • H01H33/6661—Combination with other type of switch, e.g. for load break switches

Definitions

  • the invention relates to an electrical switching device with a first interrupter unit for interrupting and connecting an electrical line, in particular an air-insulated earthing switch, wherein in the electrical switching device at least a second encapsulated interrupter unit is arranged parallel to the first interrupter unit and the voltage flashovers arising when connecting or disconnecting the electrical line Arcs occur in the second interrupter unit, wherein the second interrupter unit when connecting the electrical line before the first interrupter unit and when interrupting the electrical line after the first interrupter unit is switchable. Furthermore, the invention relates to a method for switching an air-insulated earthing switch, wherein at the air-insulated earthing switch no arc due to a voltage flashover or the contact separation is formed.
  • Conventional air-insulated earthing switches are designed as a swivel or as a swing-thruster earth electrode. When connecting a line or a switchgear to the ground potential or switching off the earth potential, these switch-on processes generate a capacitive and / or an inductive current, which can lead to an arc at a certain distance between the main contacts of the earthing switch. Since the earthing switches are usually operated in open-air systems, this open arc poses a risk to the persons and electrical devices in the system. To date, this problem has been solved by switching an auxiliary contact with a leading or lagging function to the main contact. Only at the auxiliary contact ignites an emerging arc. As a result, the main contacts of the air-insulated earthing switch are protected from the action of arcing. The disadvantage here is that the case Arcing continues to develop outdoors and thus poses a safety risk.
  • An electrical switching device of the type mentioned is from the US 5,276,286 known.
  • the object of the present invention is to ensure arc-free switching of a main switch.
  • the object is achieved in that a circuit breaker between the air-insulated earthing switch and the second interrupter unit is arranged and by means of a receiving device on a movable main contact of the air-insulated earthing switch befind Anlagen first part of the circuit breaker makes contact with the second part of the circuit breaker.
  • the inventive switchgear ensures that a possible arc occurs exclusively in the second interrupter unit and thus the first interrupter unit can be switched in an arc-free manner.
  • this results in the advantage that a possible arc does not occur at the main contacts of the air-insulated earthing switch and thus extends the life of the switchgear.
  • the receiving device By the movement of the movable main contact by means of the first part of the circuit breaker, the receiving device performs a rotational movement. Shortly before reaching the end position for the switched state of the main movable contact performs a lifting movement in the fixed main contact. This movement sequence of the movable main contact is used to interrupt the existing electrical connection between the two parts of the circuit breaker again in the on state. Previously, the vacuum switching chamber has been switched by the rotation and lifting movement. In the end position of the movable main contact in the switched state, the second interrupter unit is therefore again electrically separated from the main flow path by the opened disconnect switch.
  • the first part of the circuit breaker is dimensioned so that with a sufficient separation distance between the main contacts, the receiving device due to the rotational movement then the second interrupter unit, such as a vacuum interrupter opens. A resulting arc remains in the chamber of the second interrupter unit.
  • the circuit breaker can also be opened without power. This movement is ensured by the coordinated geometry and design of the movable main contact, the length and arrangement of the first part of the circuit breaker, as well as the design of the receiving device.
  • the second interrupter unit is a circuit breaker and / or a load switch and / or a disconnector and / or a vacuum interrupter chamber and / or a surge arrester, e.g. a spark gap and / or a voltage limiter.
  • the arc is ignited exclusively in the closed chamber of the second interrupter unit and thus shielded to the outside.
  • a serial arrangement of the two sub-cup units can be used.
  • the second interrupter unit is arranged on the voltage potential side, in particular the high-voltage potential side, which is applied to the switching device.
  • at least one further interrupter unit for discharging overvoltages is arranged in parallel and / or in series with the second interrupter unit.
  • the third interrupter unit is a surge arrester, a spark gap, open or encapsulated or other voltage limiters.
  • the rated voltage of the second interrupter unit can be selected smaller than the rated voltage of the first switching chamber.
  • the second interrupter unit is integrated in a fixed contact of an air-insulated earthing switch as the first interrupter unit. This results in the advantage that existing earthing switchgear can be retrofitted with a corresponding second interrupter unit.
  • the second interrupter unit is connected in parallel or in series with the first interrupter unit.
  • the current strengths of the two interrupter units must be designed in each case with respect to the maximum currents.
  • the current stability of the second interrupter unit can be dimensioned smaller than the first interrupter unit. In this case, the use of a circuit breaker between the first and second interrupter unit is then advantageous.
  • a method of switching an air-insulated earthing switch the air-insulated earthing switch being connected to a second interrupter unit arranged parallel to the air-insulated earthing switch, the second interrupter unit closing the electrical line before the air-insulated earthing switch and first disconnecting the electric wire air-insulated earthing switch and only then the second interrupter unit is disconnected from the electrical line, wherein a contact to the second part of a circuit breaker is made by a receiving device located at a movable main contact of the air-insulated earthing switch first part of a circuit breaker.
  • the disconnection point When using a separation point as the connection between the air-insulated earthing switch and the second interrupter unit, the disconnection point is first closed, then the second interrupter unit, then the air-insulated earthing switch and opened the disconnection point when the line connection is established.
  • the open separation point When switching off the open separation point is first closed, then open the air-insulated earthing switch, then opened the second interrupter unit under any occurring generation of an arc and opened the separation point again after complete separation of the electrical line.
  • FIG. 1 shows a schematic side view of an air-insulated earthing switch 2 as a first interrupter unit as part of an electrical switching device (not shown).
  • a vacuum interrupter chamber 3 is integrated as a second interrupter unit.
  • a boom 5a on the movable main contact 4b engages during the rotational movement of the movable main contact 4b during the switch-on in the receiving device 6 and thus establishes an electrical connection via the separation point 5a, 5b ago.
  • the vacuum interrupter chamber 3 is then also closed.
  • a resulting arc can be deleted within the vacuum interrupter chamber 3.
  • the disconnection point 5a, 5b is opened again by means of the extension of FIG. 5a, so that the main flow path exclusively through the air-insulated earthing switch 2 runs.
  • the separation point 5a, 5b separates the vacuum interrupter chamber 3 from the ground current path.
  • the separation point 5a, 5b is opened by extending the main movable contact 4b, so that now the vacuum interrupter chamber 3 and the air-insulated earthing switch 2 are completely disconnected and de-energized.
  • the figure Fig. 2 shows a method sequence according to the invention for the arc-free switching on an air-insulated grounding switch 2 using an additional separation point 5a, 5b.
  • the air-insulated earthing switch 2 and the second interrupter unit 3 as a vacuum switch and a separating point 5a, 5b arranged between the air-insulated earthing switch 2 and the vacuum interrupter 3 are opened.
  • the separation point 5a, 5b is now closed first and then made an electrical connection of the line 7 via the vacuum interrupter chamber 3.
  • An optionally resulting arc is deleted within the vacuum interrupter chamber 3.
  • the fixed main contact 4 a of the air-insulated grounding switch 2 is closed, in which case now no arc can occur.
  • the vacuum interrupter chamber 3 is subsequently separated from the electrical line 7 by means of the separation point 5a, 5b.
  • FIG. 3 shows a turn-off operation according to the invention of arc-free switching of an air-insulated earthing switch 2 in conjunction with a vacuum interrupter chamber 3 as a second interrupter unit and a separation point 5a, 5b.
  • the movable main contact 4b of the air-oiled grounding switch 2 is subsequently removed from the fixed main contact 4a.
  • the electrical connection is made in this phase exclusively via the vacuum interrupter chamber 3 as a second interrupter unit.
  • the contacts of the vacuum interrupter chamber 3 are also opened, so that an optionally resulting arc exclusively in the vacuum interrupter chamber 3 ignites.
  • the fixed main contact 4a of the air-insulated grounding switch 2 is now far enough away from the main movable contact 4b to ignite an arc in the air between the main contacts 4a, 4b due to the separation distance.
  • the separation point 5a, 5b is opened, so that the electrical connection is now canceled.
  • the kinematics in the main flow path is used to make the appropriate switching operation.
  • the movement of the movable main contact 4b is used for the force to be used for closing or opening the separation point 5a, 5b and the vacuum interrupter chamber 3 as a second interrupter unit.
  • the vacuum interrupter chamber 3 does not need its own power supply and it is also no auxiliary flow path parallel to the earth current necessary.
  • the figure Fig. 4 shows a circuit diagram of the switchgear 1 according to the invention with a arranged parallel to the second interrupter unit 3 surge arrester as a third interrupter unit 8.
  • the parallel to the earthing switch 2 arranged as a first interrupter vacuum interrupter chamber 3 as the second interrupter unit is additionally protected by the third interrupter unit 8 as a spark gap and limited in voltage ,
  • the vacuum chamber 3 can be dimensioned smaller than the earthing switch 2 with respect to the voltage and current resistance.
  • further interrupter units may additionally be arranged in parallel and / or in series with respect to the vacuum interrupter chamber 3 in the electrical switchgear 1.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Keying Circuit Devices (AREA)
EP20070704621 2006-02-22 2007-02-16 Elektrisches schaltgerät Expired - Fee Related EP1991999B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006008933A DE102006008933B4 (de) 2006-02-22 2006-02-22 Elektrisches Schaltgerät
PCT/EP2007/051499 WO2007096302A1 (de) 2006-02-22 2007-02-16 Elektrisches schaltgerät

Publications (2)

Publication Number Publication Date
EP1991999A1 EP1991999A1 (de) 2008-11-19
EP1991999B1 true EP1991999B1 (de) 2013-12-25

Family

ID=38008270

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070704621 Expired - Fee Related EP1991999B1 (de) 2006-02-22 2007-02-16 Elektrisches schaltgerät

Country Status (8)

Country Link
US (1) US7986061B2 (zh)
EP (1) EP1991999B1 (zh)
CN (1) CN101385108B (zh)
BR (1) BRPI0708214B8 (zh)
DE (1) DE102006008933B4 (zh)
MX (1) MX2008010819A (zh)
RU (1) RU2410788C2 (zh)
WO (1) WO2007096302A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2946180B1 (fr) * 2009-05-26 2012-12-14 Areva T & D Sa Dispositif d'accrochage et de verrouillage interne a un interrupteur ou a un disjoncteur.
EP2302748B1 (en) * 2009-09-23 2012-05-16 ABB Technology Medium or high voltage switchgear apparatus and method of earthing
FR2980633B1 (fr) * 2011-09-27 2013-09-06 Schneider Electric Ind Sas Appareillage de distribution electrique moyenne tension
EP2731120A1 (en) * 2012-11-08 2014-05-14 ABB Technology AG Vacuum interrupter arrangement for a medium voltage circuit breaker with cup-shaped TMF-contacts
CN104124104B (zh) * 2013-04-25 2016-08-03 国家电网公司 一种具有开合感应电流能力的接地开关
US20160160232A1 (en) * 2013-07-12 2016-06-09 Bayer Cropscience Lp Als inhibitor herbicide tolerant mutant plants
DE102019213320A1 (de) * 2019-09-03 2021-03-04 Siemens Energy Global GmbH & Co. KG Einsäulen-Trennschalter mit Vakuum-Schaltröhre als Hilfskontaktsystem

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2522525A1 (de) * 1975-05-21 1976-12-02 Driescher Eltech Werk Lasttrennschalter, insbesondere fuer den betrieb in einem mittelspannungsbereich
US4376271A (en) * 1981-06-18 1983-03-08 Siemens-Allis, Inc. Polarized DC contactors
US5070252A (en) * 1990-04-03 1991-12-03 Automatic Switch Company Automatic transfer switch
FR2680911B1 (fr) 1991-08-28 1995-01-20 Gec Alsthom Engergie Inc Sectionneur de terre a pouvoir de coupure.
FR2719154B1 (fr) * 1994-04-25 1996-06-07 Merlin Gerin Interrupteur électrique moyenne tension.
FR2722912B1 (fr) * 1994-07-20 1996-09-13 Schneider Electric Sa Interrupteurs electriques moyenne tension
RU2117351C1 (ru) 1997-03-11 1998-08-10 Владимир Леонтьевич Лотоцкий Коммутирующее устройство
DE19918077C1 (de) * 1999-04-21 2000-11-09 Driescher Eltech Werk Lastschalter
DE19954460C2 (de) * 1999-11-12 2002-02-28 Pilz Gmbh & Co Sicherheitsschaltgerät zum Ein- und sicheren Ausschalten eines elektrischen Verbrauchers, insbesondere einer elektrisch angetriebenen Maschine
DE102005051065B4 (de) * 2005-10-25 2011-12-08 Infineon Technologies Ag Integrierte Halbleiterschaltung zum Zuschalten einer Spannungsdomäne

Also Published As

Publication number Publication date
MX2008010819A (es) 2008-09-05
DE102006008933A1 (de) 2007-08-30
CN101385108B (zh) 2013-10-02
RU2410788C2 (ru) 2011-01-27
DE102006008933B4 (de) 2009-06-18
BRPI0708214B1 (pt) 2018-06-26
WO2007096302A1 (de) 2007-08-30
RU2008137648A (ru) 2010-03-27
US20090020506A1 (en) 2009-01-22
US7986061B2 (en) 2011-07-26
BRPI0708214A2 (pt) 2011-05-17
EP1991999A1 (de) 2008-11-19
CN101385108A (zh) 2009-03-11
BRPI0708214B8 (pt) 2023-04-25

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