EP1411535A1 - Interrupteur de puissance avec dispositif de refroidissement d'arc - Google Patents

Interrupteur de puissance avec dispositif de refroidissement d'arc Download PDF

Info

Publication number: EP1411535A1
Authority: EP; European Patent Office
Prior art keywords: arc; contact arrangement; circuit breaker; main contact; interaction section
Prior art date: 2002-09-20
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

EP03090255A

Other languages

German (de)

English (en)

Other versions

EP1411535B1 (fr

Inventor

Jörg Teichmann

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.)

2002-09-20

Filing date

2003-08-14

Publication date

2004-04-21

2003-08-14 Application filed by Siemens AG filed Critical Siemens AG

2004-04-21 Publication of EP1411535A1 publication Critical patent/EP1411535A1/fr

2005-11-23 Application granted granted Critical

2005-11-23 Publication of EP1411535B1 publication Critical patent/EP1411535B1/fr

2023-08-14 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Links

Images

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
- H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- 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
- 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
- H01H33/122—Load break switches both breaker and sectionaliser being enclosed, e.g. in SF6-filled container

Definitions

the invention relates to a circuit breaker for breaking an electrical current with a gas-tight housing, which is filled with an extinguishing gas and in which at least one Main contact arrangement is arranged, which is a fixed contact and has a moving contact, each main contact assembly electrically parallel to an arcing contact arrangement is switched, which the main contact arrangement in their Switching movement lags and with a quenching coil for quenching an arc is equipped.
Such a circuit breaker is already known from EP 0 768 692 B1 known.
the circuit breaker disclosed there points a gas-tight housing filled with sulfur hexafluoride, in which a main contact arrangement and one parallel to this switched arcing contact arrangement are arranged.
the main contact arrangement has a pivotable movement contact Switching knife on the appropriate connection means with a drive shaft protruding into the housing connected is.
the arcing contact arrangement has one also driven by the drive shaft, but linear led moving arcing contact that with his end facing away from the drive shaft into an arcing chamber protrudes, in which a fixed arcing contact is arranged is.
the arcing chamber also has a fixed one Arcing contact surrounding quenching coil.
the arcing contact arrangement rushes the main contact assembly in their Switching movement after. In the event of a power failure, it opens first the main contact, causing the current flow to one Extinguishing branch commutates the quenching coil and not yet interrupting arcing contact arrangement comprises. Doing so induces a voltage in the quenching coil that commutates counteracts the current on the arcing contact arrangement. Therefore, it comes with the separation of the main contact arrangement to form a tear-off arc between the Switching knife and the fixed contact, the electrical resistance of the tear-off arc with increasing distance between Switching knife and fixed contact increases. Is the electrical Arc resistance greater than the resistance of the The quenching coil favors the commutation of the current.
the delayed commutation of the current on the arcing contact arrangement is due to the erosion of the contacts Main contact arrangement by the arc and the associated Deterioration of contact in normal operation the circuit breaker undesirable.
the invention is based on the problem of a circuit breaker of the type mentioned at the beginning which commutates the current to the arcing contact assembly accelerated when disconnecting the main contact arrangement becomes.
the invention solves this problem in that on the main contact arrangement an arc cooling element is provided, the at least one interaction section for cooling the Arc during the switching process.
the teaching according to the invention is based on the consideration that by the interaction of the tear-off arc with the interaction section the tear-off arc Energy is withdrawn, for example as heat transfer or heat of vaporization at the interaction section passes into the arc cooling element.
the Arc column temperature significantly reduced.
conductivity of an arc is related to its temperature coupled so that the arc resistance and therefore the voltage drop across the arc due to this interaction increases. Therefore, by the arc cooling element one versus arcing-free main contact arrangements causes faster increase in arc resistance and thus a faster commutation of the current into one Arcing contact arrangement and the quenching coil Favored extinguishing branch.
the arc cooling element is advantageously arranged that the tear-off arc drawn when the switching knife moves automatically and without moving the interaction section interacts with this. Is to the interaction section so with respect to the main contact arrangement to order that on the one hand no longer arranged in the way of the movably guided moving contact on the other hand, however, it lies in an area into which the tear-off arcing at least partially extends.
the interaction section deviates from this designed to be movable, its movement being similar to that of the switching knife is coupled.
this version of the Invention becomes the interaction section after separation the main contact arrangement is moved into the arcing area, for example by a suitable folding mechanism worked.
the interaction section to the main contact arrangement be concave.
the geometric design of the interaction section is arbitrary according to the invention, insofar as it separates the main contact arrangement in interaction with the tear-off arc device and its cooling effect. So he can Interaction section, for example, also thorn-like or be rod-shaped, with the interaction protrudes into this with the tear-off arc. deviant for this purpose the interaction section has a boundary surface on the spatial spread of the tear-off arc limited.
the interaction section advantageously consists of a non-conductive insulating material.
the interaction section for example, massive and through Appropriate joining process with one of the remaining sections connected to the arc cooling element.
the Interaction section also formed as a cover cap be over a one made of a suitable metal Section of the arc cooling element pushed and thus is positively connected.
the interaction section differs from this the main contact assembly is kept isolated. Both practical However, advancements are common that skipping of the tear-off arc on the interaction section is avoided. Thus, the formation of an arc base on the interaction section essentially suppressed. Electrical isolation of the interaction section can, for example, by narrow non-conductive Insulating webs can be realized on one or both sides of the interaction section are arranged and themselves extend in the transverse direction of the same. The interaction section then according to this expedient development also from a conductive material such as copper, Steel sheet or the like exist, its electrical connection to the main contact arrangement through the insulating bars is interrupted.
the arc cooling element is advantageously on the fixed contact the main contact arrangement provided, the Interaction section extends to the moving contact.
the interaction section expediently has one of the Main contact arrangement facing flat boundary surface.
Such an arc cooling element is easy to manufacture and therefore inexpensive.
the moving contact is a rotating or swiveling switch blade and the flat boundary surface extends tangentially a circle that is concentric with one of the switch blades arranged circular path swept during the switching process is.
the moving contact is a rotatable or swiveling switching knife and the Interaction section facing the main contact arrangement curved boundary surface which has a pitch circle that is concentric with one of the switching knives arranged circular path swept during the switching process is.
the Interaction section facing the main contact arrangement curved boundary surface which has a pitch circle that is concentric with one of the switching knives arranged circular path swept during the switching process is.
this embodiment of the invention is a the same even over longer switching distances of the switching knife Remaining small distance between the arc cooling element and Switching knife and thus a greater interaction.
the moving contact can also be linear be guided and perform a lifting movement for switching, wherein the interaction section is designed to be movable is, the movement of the interaction section with the Movement of the moving contact of the main contact arrangement coupled is.
the interaction section is advantageously made of one Thermoplastics, a thermoset, a ceramic material, Porcelain or their mixtures made.
additives can further support the commutation of the current.
Molybdenum sulfide is known as such a substance.
glass fiber reinforcements or other useful additives conceivable.
FIG. 1 shows an embodiment of the invention Circuit breaker 1 in a side view, parts of a Housing 2 of the circuit breaker 1 were removed to To grant a view of otherwise hidden components. It is recognizable that a drive unit on a front wall 3 of the housing 2 4 is arranged which is a linear drive movement generated.
the drive unit 4 is with a swing arm 5 connected, which is partly arched or in other words curved and in the middle of their curvature the housing 2 is articulated.
the rocker 5 At her from the drive unit 4 opposite end is the rocker 5 with a coupling piece 6 connected, which in turn attached to a coupling rod 7 is.
the switchgear 1 shown is a three-pole switchgear 1 designed for use in conventional three-phase networks is designed.
Switch carriage 8 is via a link lever 9 with a Switching knife 10 connected at one end to a stationary Busbar 11 is articulated, the busbar electrically connected to a connection bushing 12 is which reaches through the front wall 3 of the housing 2 and Connection of a cable not shown in the figure is provided is.
a drive movement generated by the drive unit 4 is from the rocker 5, the coupling piece 6, the coupling rods 7, the shift carriage 8 and the link lever 9 on the pivotable Switching knife 10 transmitted, which after passing through a Partial orbit in contact with a fixed contact 13, the one with a live busbar 14 is connected.
a switch blade 10 and a fixed contact 13 form one Main contact arrangement.
Each main contact arrangement is different a quenching contact arrangement not shown in the figure electrically connected in parallel with that of the main contact arrangement lags behind in their switching behavior. In other words disconnects each main contact assembly from the associated one Arcing contact arrangement so that it commutates of the breaking current from the main contact arrangement the arcing contact assembly comes.
each arcing contact arrangement is in each case arranged in an extinguishing chamber 15 and at least in this surrounded by an erase coil after the main contact assembly is disconnected flowed through by the commutation current becomes. In this way a voltage is induced which create a tear-off arc on the main contact arrangement leaves.
the voltage drop across this tear-off arc drives the current into a quenching branch which contains the arcing contact arrangement and the quenching coils and is therefore more inductive.
the greater the voltage drop at the tear-off arc the faster and easier the current commutates into the extinguishing branch and the less the damage to the main contact arrangement is caused by a burn-off of the contacts caused by the tear-off arc.
a specific arc resistance R 1 can be assigned to the tear-off arc that arises when the main contacts are disconnected. The higher the arc resistance R 1 , the faster the current passes into the quenching branch. It is therefore advantageous to let the arcing resistance of the tear-off arc grow as quickly as possible in order to favor the commutation of the current. For this reason, an arc cooling element 16 is provided on the fixed contact 13 of the main contact arrangement.
FIG. 2 shows the arc cooling element 16 in an enlarged Presentation. It can be seen that the arc cooling element 16 from a fastening section 17 for assembly and an interaction section 18 and a Expedient screw connection 19 on the fixed contact 13 Main contact assembly is attached.
the interaction section 18 extends in the direction of the switching knife 10.
FIG. 3 also shows the arc cooling element 16 according to FIG. 2 additionally drawn auxiliary lines to clarify the Orientation of the interaction section 18 with respect to the Switching knife 10.
the interaction section 18 is tangent to a circle 20 which is concentric is arranged to a circular path that from the Switching knife 10 swept over during the switching process becomes.
the center of the circle 20 falls with the articulation point 21 of the switching knife 10 on the stationary Busbar 11 together.
the radius of the circle 20 and thus the distance of the interaction section 18 from the Articulation point 21 is selected so that contact between Interaction section 18 and the switching knife 10 avoided is.
the main contact arrangement is in one Contact position shown in the between the switching knife 10th and the interaction section 18 maintained a distance d is.
the interaction section 18 is in the embodiment shown made of a thermoplastic, a Thermoplastics, so that a skip of the tear-off arc on the interaction section 18 is avoided. Due to the non-conductive material, the so-called foot point freedom of the interaction section 18 is provided. The arc can therefore no approaches on the surface of the interaction section 18 form.
Disconnect the main contact arrangement i.e. by rotating the rotating one Switching knife 10, the arc to the outer edge of the switching knife 10 driven so that the arc column bulged over the switching knife column.
the interaction section 18 Through the Interaction of the arc column with the interaction section 18 there is heat transfer from the tear-off arc in the non-conductive surface of the interaction section 18, whereby material evaporation can occur.
Figure 4 shows a further embodiment of the arc cooling element 16, which has a curved boundary surface 22nd having.
the radius of curvature corresponds to the boundary surface 22 the distance of the articulation point 21 when fastened, so that when the switching knife 10 rotates during the Switching a constant distance between the free Switch knife end and the interaction section 18 provided is.
FIG. 5 schematically shows an embodiment which differs from this of the arc cooling element 16, referring to the illustration the fixed contact of the main contact arrangement is dispensed with has been.
the arc cooling element 16 shown in FIG. 5 has several, namely three, interaction sections 18 which has an insulating section 23 on the fastening section 17 are held.
the insulating section enables this 23 an insulating holder of the effective sections 18 and consists for example of a dimensionally stable plastic such as epoxy or the like.
the electrically conductive and plate-shaped interaction sections 18 stacked and spaced apart, being but are kept offset to each other during the switching process each as close as possible to the switch blade 10, however not to be in the way of it. Lying more closely the interaction sections 18 with respect to that of the Switch knife 10 swept circular path on a concentric to this Circle with a slightly larger radius.
the insulating section 23 encompasses the interaction sections 18 only in their end areas, so that an interaction with the tear-off arc in their central area is. This interaction creates several partial arcs arranged one behind the other between the interaction sections 18, the partial arcs essentially perpendicular to the surface of the interaction sections 18 run. The tear-off arc is thus in Partial arcs split, causing a strong cooling of the entire tear-off arc is brought about.

Landscapes

Arc-Extinguishing Devices That Are Switches (AREA)

EP20030090255 2002-09-20 2003-08-14 Interrupteur de puissance avec dispositif de refroidissement d'arc Expired - Fee Related EP1411535B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE10244846		2002-09-20
DE2002144846 DE10244846A1 (de)	2002-09-20	2002-09-20	Leistungsschalter mit Lichtbogenkühlelement

Publications (2)

Publication Number	Publication Date
EP1411535A1 true EP1411535A1 (fr)	2004-04-21
EP1411535B1 EP1411535B1 (fr)	2005-11-23

Family

ID=29414336

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP20030090255 Expired - Fee Related EP1411535B1 (fr)	2002-09-20	2003-08-14	Interrupteur de puissance avec dispositif de refroidissement d'arc

Country Status (4)

Country	Link
EP (1)	EP1411535B1 (fr)
DE (2)	DE10244846A1 (fr)
ES (1)	ES2252616T3 (fr)
NO (1)	NO325500B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2697154A (en) *	1951-05-26	1954-12-14	Westinghouse Electric Corp	Circuit interrupter
GB1094596A (en) *	1965-08-16	1967-12-13	Central Transformer Corp	Circuit interrupters
US5616898A (en) *	1994-04-22	1997-04-01	Gec Alsthom T & D Sa	Medium-voltage or high-voltage circuit-breaker
EP0768692A1 (fr) *	1995-10-16	1997-04-16	Schneider Electric Sa	Dispositif électrique à gaz isolant et à autoexpansion

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3803117A1 (de) *	1988-02-03	1989-08-17	Sachsenwerk Ag	Stromunterbrecher fuer mit einem isoliergas gefuellte, gekapselte schaltanlagen
TW293130B (fr) *	1994-03-10	1996-12-11	Mitsubishi Electric Corp

2002
- 2002-09-20 DE DE2002144846 patent/DE10244846A1/de not_active Ceased
2003
- 2003-08-14 DE DE50301727T patent/DE50301727D1/de not_active Expired - Lifetime
- 2003-08-14 EP EP20030090255 patent/EP1411535B1/fr not_active Expired - Fee Related
- 2003-08-14 ES ES03090255T patent/ES2252616T3/es not_active Expired - Lifetime
- 2003-09-22 NO NO20034221A patent/NO325500B1/no not_active IP Right Cessation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2697154A (en) *	1951-05-26	1954-12-14	Westinghouse Electric Corp	Circuit interrupter
GB1094596A (en) *	1965-08-16	1967-12-13	Central Transformer Corp	Circuit interrupters
US5616898A (en) *	1994-04-22	1997-04-01	Gec Alsthom T & D Sa	Medium-voltage or high-voltage circuit-breaker
EP0768692A1 (fr) *	1995-10-16	1997-04-16	Schneider Electric Sa	Dispositif électrique à gaz isolant et à autoexpansion

Also Published As

Publication number	Publication date
DE10244846A1 (de)	2004-04-08
NO20034221L (no)	2004-03-22
NO20034221D0 (no)	2003-09-22
EP1411535B1 (fr)	2005-11-23
DE50301727D1 (de)	2005-12-29
NO325500B1 (no)	2008-05-19
ES2252616T3 (es)	2006-05-16

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