EP2461339A1 - Schutzschalterpol - Google Patents

Schutzschalterpol Download PDF

Info

Publication number
EP2461339A1
EP2461339A1 EP20100015326 EP10015326A EP2461339A1 EP 2461339 A1 EP2461339 A1 EP 2461339A1 EP 20100015326 EP20100015326 EP 20100015326 EP 10015326 A EP10015326 A EP 10015326A EP 2461339 A1 EP2461339 A1 EP 2461339A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
interrupter
breaker pole
contact
actuator
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
EP20100015326
Other languages
English (en)
French (fr)
Other versions
EP2461339B1 (de
Inventor
Christian Dr.-Ing. Reuber
Dietmar Dr.-Ing. Gentsch
Pavel Vrbka
Philipp Dipl.-Ing. Masmeier
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 Technology AG
Original Assignee
ABB Technology 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 Technology AG filed Critical ABB Technology AG
Priority to EP10015326.1A priority Critical patent/EP2461339B1/de
Priority to CN201110463242.0A priority patent/CN102592904B/zh
Publication of EP2461339A1 publication Critical patent/EP2461339A1/de
Application granted granted Critical
Publication of EP2461339B1 publication Critical patent/EP2461339B1/de
Not-in-force 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
    • H01H33/60—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
    • H01H33/6662—Operating arrangements using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators
    • 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

Definitions

  • the invention relates to the field of magnetic actuators.
  • the invention relates to a circuit breaker pole and a medium voltage circuit breaker.
  • a circuit breaker or switchgear comprises a circuit breaker pole for each phase of the current to be switched on and off.
  • a circuit breaker pole may comprise two contacts that are moved or pushed together by a drive or actuator to form an electrical contact for closing the circuit breaker pole. These contacts are moved away from each other to interrupt the electrical contact for opening the circuit breaker pole.
  • the two contacts form the interrupter of the circuit breaker pole, which for example may be a vacuum interrupter.
  • a first aspect of the invention relates to a circuit breaker pole.
  • the circuit breaker pole comprises an interrupter for connecting and disconnecting an electrical path.
  • the interrupter may comprise a first electrical contact and a second electrical contact that are movable with respect to each other along a longitudinal axis of the circuit breaker.
  • the interrupter may be or may comprise a vacuum interrupter.
  • the contacts of the interrupter may be part of the electrical path.
  • the electrical path may further comprise lines for connecting the circuit breaker pole with the circuit breaker or with a cable to be interrupted by the circuit breaker pole.
  • the circuit breaker pole comprises an actuator for actuating the interrupter, for example by moving the first electrical contact and the second electrical contact with respect to each other along the longitudinal axis.
  • the actuator may comprise a force transferring element mechanically connected to the actuator and to an electrical contact of the interrupter.
  • the actuator may be or may comprise a magnetic drive.
  • the actuator has an (axial) opening surrounding the longitudinal axis.
  • the electrical path extends through the axial opening.
  • the complete electrical path is arranged near the (central) longitudinal axis and the extension of the circuit breaker pole in a radial direction may be reduced, since the conductors of the circuit breaker pole need not to be guided away from the central axis.
  • the (vacuum) interrupter and the actuator may be arranged in a way that they are axially symmetric.
  • the magnetic drive may be hollow in its centre. Through this centre, a medium voltage cable or line can be lead that connects one of the terminals of the vacuum interrupter. With an arrangement like this, a circuit breaker pole may be integrated in a cable, resulting in an extremely compact medium voltage switching and interrupting unit.
  • the electrical path comprises a line for electrically connecting a cable with the circuit breaker pole and the line extends through the opening of actuator.
  • the opening within the actuator has only to accommodate the line (for example a conductor and its isolation) and the opening may be small with respect to the whole actuator.
  • the actuator comprises a magnetic drive with a coil in a core for attracting a movable plate.
  • the force from the movable plate may be transferred to the interrupter by an element extending through the opening. Not only the current but also the force for moving the interrupter contact is transferred through the opening.
  • the force transferring element is a tube surrounding the line. This may be the case, when the movable plate is on one side of the core and the interrupter is on another side of the core, i. e. in the case when the actuator and the interrupter are arranged in sequence along the longitudinal axis. In a radial direction the conductor of the first line, an insulating layer of the first line and the tube may extend through the opening of the actuator.
  • the coil, the core, the movable plate may be axially symmetric and/or all parts may have an (axial) opening through which the electrical path, in particular the first line, and the force transferring element extend.
  • the force transferring element is the first electrical contact of the interrupter. This may be the case, when the interrupter is arranged at least partly in the hollow centre of the actuator.
  • the circuit breaker comprises a contact system for providing an electrical connection between the (first electrical contact of the) interrupter and a first line for connecting the interrupter with a cable to be interrupted by the circuit breaker pole, while the first electrical contact and the first line are moving with respect to each other along the longitudinal axis.
  • the contact system may be arranged between the interrupter and the actuator or may be arranged on the side of the actuator opposite to the interrupter.
  • the contact system may be (at least partially) rotational symmetric to allow the interrupter to be rotated with respect to the line without losing electrical contact.
  • the contact system may provide a continuous electrical contact by a longitudinal and a rotational movement of the interrupter.
  • the contact system may comprise a siral contract on a first conductor end, wherein the ring is situated within an contact tube mechanically connected to a second conductor end.
  • the first conductor end may be the end of the conductor of a line of the circuit breaker pole and the second conductor end may be part of an electrical contact of the interrupter.
  • the interrupter, the contact system and the actuator are arranged in sequence along the axial direction. This may result in a compact circuit breaker pole with respect to a radial direction.
  • the arrangement may be that first the interrupter, second the contact system and third the actuator are aligned along the longitudinal direction. It may also be possible that first the interrupter, second the actuator, third the contact system are aligned after each other.
  • the interrupter extends (at least partially) through the opening of the actuator. This may compact the circuit breaker pole with respect to a longitudinal direction.
  • the interrupter is rotatable about the longitudinal axis with respect to a first line, wherein in a first rotational position, the circuit breaker is electrically connected to a busbar contact and in a second rotational position, the circuit breaker is electrically connected to an earthing contact.
  • the contact may be with the second line or the second electrical contact of the interrupter.
  • Nearly all components of the circuit breaker pole may be axially symmetric with respect to the longitudinal axis resulting in an axially symmetric circuit breaker pole which may be rotated with respect to the line.
  • the line for making the contact may extend within a first section in an axial direction, may bend and may extend within a second section in a radial direction, such that the end of the line is moving between the first and second rotational position, when the circuit breaker is rotated.
  • the interrupter is rigidly connected with a housing of the circuit breaker pole, the housing is rotatable with respect to the first line.
  • the circuit breaker may be rotated as a whole for switching between the busbar contact and the earthing contact.
  • the interrupter is rotatable with respect to a housing of the circuit breaker pole.
  • the busbar contact, the earthing contact and the circuit breaker may have a common housing for isolating and shielding the busbar contact, the earthing contact and the circuit breaker.
  • a further aspect of the invention relates to a medium voltage circuit breaker or medium voltage switchgear with a circuit breaker pole as described in the above and in the following.
  • the magnetic drive may contain permanent magnets that hold the pole in closed position without current flowing in the coil of the magnetic drive.
  • the magnetic drive may contain a second coil or an opening spring.
  • Fig.1 shows a circuit breaker pole 10 for generating an electrical contact between a first line 12 and a second line 14.
  • the first line 12 comprises a first conductor 16 that is insulated by a first insulation layer 20 and the second line 14 comprises a second conductor 18 that is insulated by a second insulation layer 22.
  • the first line 12 enters a housing 24 (that may be an earthed shield 24) of the circuit breaker pole 10 from below and can be brought into contact or interrupted by the interrupter 26 of the circuit breaker pole 10 with the second line 14, which enters to housing 24 from above.
  • the interrupter 26 comprises a first electrical contact 28 electrically connected with the first conductor 16 and a second electrical contact 30 electrically connected with the second conductor 18.
  • the interrupter 26 is a vacuum interrupter 26 and has a vacuum chamber 27 containing a vacuum 29.
  • the second electrical contact 30 is rigid connected with the housing 24 of the circuit breaker pole 24 and is not movable with respect to the housing 24. Contrary to this, the first contact 28 is movable within the housing 24 in an axial direction A along an longitudinal axis L of the circuit breaker pole 10.
  • the terms "below” and “above” may be understood that they both indicate opposite directions parallel to the axial direction A.
  • the circuit breaker 10 has a magnetic drive 31 or actuator 31 within the housing 24.
  • the magnetic drive 31 is situated below the interrupter 26.
  • the magnetic drive 31 comprises a core 32, a coil 34 and a movable plate 36.
  • the movable plate 36 is attracted towards the core 32.
  • the actuator 31 and in particular its components 32, 34, 36 are rotational symmetric with respect to the axis L and comprise an opening 33 surrounding the axis L.
  • the first line 12, i. e. the conductor 16 and the insulation layer 20, extend through the opening 33.
  • the force of the magnetic drive 31 is transferred using an insulating tube 38 that also may contain a contact spring 40.
  • the motion of the movable plate 36 is transferred with the insulating tube 38 that extends through the opening 33 and the contact spring 40 to the first contact 28 of the interrupter 26.
  • the actuator 31 has a hollow central axis, allowing the first line 12, in particular the first conductor 16 and the first insulating layer 20, to cross the actuator 31 (or to extend through the actuator 31) and to connect the first line 12 to the interrupter 26.
  • an opening spring for generating a force opposite to the attracting force of the coil 34
  • this may be installed between the core 32 and the plate 36 of the magnetic actuator.
  • the earthed shield 24 has a tubelike part 42 for electrically shielding the first line 12 that extends through the opening 33 of the actuator 31.
  • the conductor 16 arranged in an radial direction, the conductor 16, the insulation layer 20, the tubelike part 42 and the insulating tube 38 are surrounding each other and extend through the opening 33.
  • the tubelike part 42 of the earthed shield may be the earthed outer layer 42 for the first line 12. It may be possible that the first insulation layer 20 and the earthed layer 42 of the first line 12 are extended into the circuit breaker pole 10, to further reduce the dimensions of a corresponding switchboard or switchgear - or to realise a panel-less switchboard.
  • the circuit breaker pole 10 comprises further a contact system 44 that electrically connects the fixed first conductor 16 of the second line 14 (that is rigidly connected to the housing 24) to the movable first contact 28 of the vacuum interrupter 26.
  • the contact system comprises a spiral contact 46 surrounding the cylindrical end 50 of the first conductor 16 and a contact tube 48 with a cylindrical inner wall 52 for accommodating the spiral contact 46.
  • the spiral contact 46 is slidable on the end 50 and/or on the inner wall 52.
  • the contact tube 48 is mechanically connected with the insulating tube 38.
  • the contact tube is mechanically connected with the first contact 28.
  • the movable plate 36, the insulating tube 38, the contact tube 48 and the first contact 28 are rigidly connected with each other and form a movable system 54 within the circuit breaker pole 10.
  • the movable system 54 is movable in the axial direction A of the circuit breaker 10.
  • spiral contact 46 may be movable in the axial direction A and may be part of the movable system 54.
  • the other parts of the circuit breaker pole 10 may all be rigidly connected with each other.
  • the circuit breaker pole 10 has an electrical path 56 comprising the first conductor 16, the contact system 44, the interrupter 26 and the second conductor 18. If the interrupter 26 is in the connecting position, all components 16, 44, 26, 18 of the electrical path 56 are energized with the medium voltage.
  • the components 16, 44, 26, 18 of the electrical path 56 are located near the longitudinal axis L and are rotational symmetric with respect to the axis L. All components of the electrical path 56 are insulated from the environment of the circuit breaker pole 10 by the insulating layers 20, 22.
  • the insulation layer 22 may extend inside the housing 24 from the second conductor 18 up to the actuator 31 and may surround the interrupter 26 and the contact system 44.
  • the circuit breaker pole 10 may be part of a switchgear for connecting and disconnecting (for example three) phases of a medium voltage.
  • the first and second lines 12, 14 may be parts of a medium voltage cable conducting one of the phases of the medium voltage.
  • Fig. 1 shows the circuit breaker pole in a closed position (the electrical contacts 28, 30 of the interrupter 26 are contacting)
  • Fig. 2 shows the circuit breaker pole 10 of Fig. 1 in an opened position.
  • the movable plate 36 is not attracted by the core 32.
  • the movable plate 36 and the components 38, 40, 44, 28 may fall down, when no current flows through the coil 34.
  • Fig. 3 shows a further embodiment of a circuit breaker pole 10 that is rotatable with respect to the first line 12.
  • it may be required to disconnect and to earth the cable or line 14. This can be done by rotating the circuit breaker pole 10.
  • the second line 14 In a first position (as shown in Fig. 3 ) the second line 14 is in electrical contact with a busbar contact 58, in a second position, the second line 14 may be in electrical contact with a earthing contact 60.
  • the cable 12 or first line 12 that is coming from below is connected via the vacuum interrupter 26 to the busbar contact 58.
  • the circuit breaker pole 10 is rotated by 180° to the second position, the cable 12 can be earthed.
  • the housing 24 of the circuit breaker pole 10 has an opening 62 through which the the first line 12 extends.
  • the earthing layer 42 of the first line 12 is not connected which the housing 24.
  • the first line 12 that is coming from below is not supposed to be rotated.
  • the contact system 44 may allow for this relative movement.
  • the common earth shield 24 is opened at its lower end to allow for the rotation.
  • the first line 12, in particular the conductor 16, the insulation layer 20 and earthed layer 42 are rotatable with respect to the other parts of the circuit breaker pole 10.
  • FIG. 4 Another embodiment for a circuit breaker pole 10 that may be earthed is shown in Fig. 4 .
  • the void 64 can be sealed and filled with silicone oil to reduce its size.
  • the outer shell 24 of the circuit breaker pole 10 is not rotatable. The rotation is limited to some of the inner components, i.e. parts 36, 38, 40, 46, 48 and the complete interrupter 26.
  • the interrupter 26 may be insulated separately by an insulation layer 66 and earthing layer 68.
  • the rotation is enabled by sliding bearings 70 that do not permit any movement in the axial direction A.
  • Fig. 5 shows an embodiment of the circuit breaker pole 10, in which the actuator 31 is positioned around the interrupter 26. This reduces the axial length of the circuit breaker pole 10.
  • the movable plate 36 of the actuator 31 is transferring its force to a plate 38' extending in the radial direction.
  • the contact system 44 is positioned, on the other side the movable plate 36 and the contact spring 40.
  • Fig. 5 shows the "Off"-position or opened position in which the interrupter contacts 28, 30 do not contact. In the "On"-position or closed position, the contact spring creates a force that presses the contacts 38, 30 against each other.
  • the foot 72 of the electrical contact 28 is the component of the electrical path 56 and the component transferring the force of the actuator 31 within the opening 33 of the actuator 31.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)
EP10015326.1A 2010-12-03 2010-12-03 Schutzschalterpol Not-in-force EP2461339B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10015326.1A EP2461339B1 (de) 2010-12-03 2010-12-03 Schutzschalterpol
CN201110463242.0A CN102592904B (zh) 2010-12-03 2011-12-02 断路器极

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10015326.1A EP2461339B1 (de) 2010-12-03 2010-12-03 Schutzschalterpol

Publications (2)

Publication Number Publication Date
EP2461339A1 true EP2461339A1 (de) 2012-06-06
EP2461339B1 EP2461339B1 (de) 2015-10-28

Family

ID=43899582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10015326.1A Not-in-force EP2461339B1 (de) 2010-12-03 2010-12-03 Schutzschalterpol

Country Status (2)

Country Link
EP (1) EP2461339B1 (de)
CN (1) CN102592904B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105788954A (zh) * 2016-05-17 2016-07-20 国网山东省电力公司济南市长清区供电公司 一种真空断路器
EP3594981A1 (de) * 2018-07-12 2020-01-15 ABB Schweiz AG Erdungsschalter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016218355A1 (de) 2016-09-23 2018-03-29 Siemens Aktiengesellschaft Unterbrechbare Kabelmuffenanordnung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19808083C1 (de) * 1998-02-20 1999-04-29 Siemens Ag Vakuumschalter
DE19857170A1 (de) * 1998-12-11 2000-06-15 Abb Patent Gmbh Schaltgerät
US20050063107A1 (en) * 2003-09-22 2005-03-24 Benke James J. Medium voltage vacuum circuit interrupter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2617633B1 (fr) * 1987-07-02 1989-11-17 Merlin Gerin Disjoncteur a arc tournant et a expansion

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19808083C1 (de) * 1998-02-20 1999-04-29 Siemens Ag Vakuumschalter
DE19857170A1 (de) * 1998-12-11 2000-06-15 Abb Patent Gmbh Schaltgerät
US20050063107A1 (en) * 2003-09-22 2005-03-24 Benke James J. Medium voltage vacuum circuit interrupter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105788954A (zh) * 2016-05-17 2016-07-20 国网山东省电力公司济南市长清区供电公司 一种真空断路器
EP3594981A1 (de) * 2018-07-12 2020-01-15 ABB Schweiz AG Erdungsschalter

Also Published As

Publication number Publication date
CN102592904B (zh) 2016-03-16
CN102592904A (zh) 2012-07-18
EP2461339B1 (de) 2015-10-28

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