EP0768692B1 - Autoexpansionsschalter mit Isoliergas - Google Patents
Autoexpansionsschalter mit Isoliergas Download PDFInfo
- Publication number
- EP0768692B1 EP0768692B1 EP19960410100 EP96410100A EP0768692B1 EP 0768692 B1 EP0768692 B1 EP 0768692B1 EP 19960410100 EP19960410100 EP 19960410100 EP 96410100 A EP96410100 A EP 96410100A EP 0768692 B1 EP0768692 B1 EP 0768692B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- circuit breaker
- arcing contact
- coil
- cartridge
- 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 - Lifetime
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
-
- 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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
- H01H33/982—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow in which the pressure-generating arc is rotated by a magnetic field
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/34—Contacts characterised by the manner in which co-operating contacts engage by abutting with provision for adjusting position of contact relative to its co-operating contact
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/38—Plug-and-socket contacts
- H01H1/385—Contact arrangements for high voltage gas blast circuit breakers
-
- 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 thermal action of the arc inside the cartridge can cause significant gas formation due to the presence of the material gasifier plastic of the support arm. Part of this gas can enter the cartridge, which disrupts the self-expanding effect, with a risk of re-striking the arc.
- the object of the invention is to improve the breaking performance of a circuit breaker self-expansion.
- the heat shield is formed by a polytetrafluoroethylene plate, held in place against the base by means of a stop ring mounted coaxially around the sleeve guide.
- the arc capture electrode is coplanar with an annular contact track for rotating the arc, said track being connected to the front side of the coil.
- the opposite end of the coil is connected to a stud current supply via a magnetic circuit.
- the excitation of the coil takes place through a ferromagnetic plate of a magnetic circuit, said plate being in electrical connection with the conductive cartridge.
- the turns coil terminals are fixed individually by auxiliary screws respectively to the magnetic circuit and to the contact track.
- the arcing contacts form an assembly telescopic, and leaf springs bear on the contact fingers associated with the fixed arcing contact and socket, to ensure contact pressure when arcing contact mobile is engaged inside the fixed arcing contact in the closed position.
- a support member orientable comprising a metal washer with notches for adjusting the axial clearance between the end of the fixed arcing contact and the electrode.
- a pole of a three-pole medium-voltage circuit breaker 10 is housed in a sealed insulating jacket 12 filled with a gas of high dielectric strength, in particular of sulfur hexafluoride SF6.
- the pole includes a pair of bushings 14, 16 arranged in current supply ranges for supplying the circuit breaker.
- the bushings 14, 16 are connected directly to a disconnector 18 of the circuit main 19, comprising inside the casing 17 a fixed main contact 20 secured to the internal end of the first bushing 14 by screws 21, and a contact main mobile 22 pivotally mounted on an axis 24 of a first support bracket 26, which is secured to the second crossing 16 by fixing screws 28.
- the envelope 12 comprises a flange 29 closed by a cover 30 with the interposition of a gasket 32.
- Inside the casing 12 is an auxiliary circuit to breaking chamber 34 containing a pair of arcing contacts 36, 38, one of which 38 is movable is slidably mounted between a closed position where it is located engagement with the fixed arcing contact 36, and an open position for separating the contacts arc 36, 38.
- the arcing contacts 36, 38 of the breaking chamber 34 are electrically connected by a connecting conductor 40 and a braid 42, respectively at the bushings 14 and 16, of so as to constitute a parallel assembly. In the closed position, the arcing contacts 36, 38 ensure the shunting of the main contacts 20, 22.
- the interrupting chamber 34 is formed by a cartridge 43 of an extinguishing device autoexpansion and rotation of the arc, said cartridge communicating with the internal volume of the casing 12 through the movable arcing contact 38 tubular.
- the actuation of the movable main contact 22, and of the movable arcing contact 38 takes place at by means of a rotary shaft 44, sealingly crossing the wall of the envelope 12 while being externally coupled to a control mechanism (not shown). Inside of the casing 12, the shaft 44 carries a crank 46 at each pole.
- the crank 46 is connected to the main movable contact 22 by a first link 48, and in contact with a movable arc 38 by a second link 50.
- the articulation of the links 48, 50 is carried out at a point 51 of the crank 46, the assembly being arranged to close the arcing contacts 36, 38 before the main contacts 20, 22, and open the contacts arc 36, 38 after the main contacts 20, 22.
- the interrupting chamber 34 has a lower support arm 62, extending perpendicular to the longitudinal axis of the cartridge 43 and the end of which is fitted an axis 64 of articulation.
- the cartridge 43 is also provided with a pair of studs attachment 66 located opposite the arm 62 in the longitudinal direction.
- the articulation axis 64 of the support arm 62 is engaged in a U-shaped notch in an extension of the bracket 26 for supporting the movable main contact 22.
- the part intermediate of the connecting conductor 40 is interposed between each pad 66 and a shoulder of the casing 12, and the end pad of the conductor 40 is connected to the main circuit by the screws 21 for fixing the fixed main contact 20 to the bushing 14.
- a opposite, the connecting braid 42 is connected to an intermediate conductor 82 having a range end plated on the base of the bracket 26 by means of the screws 28.
- the metallic cartridge 43 of the interrupting chamber 34 includes a cover 100 attached to a cylindrical wall 102 by screws fixing 104.
- the cover 100 and the wall 102 are preferably made of an alloy aluminum.
- the insulating support arm 62 adapts to the lower part of the wall 102 is equipped with a cylindrical guide sleeve 106, and a base 108 fixed on a first internal shoulder 110 of the wall 102 by screws 111.
- a tubular brass insert 112 is arranged inside the sleeve 106, and is slidably traversed by the arcing contact mobile, 38.
- the support arm 62 is produced by molding an insulating material, in particular based on polycarbonate.
- a heat shield 114 formed by a polytetrafluoroethylene plate, surrounds the sleeve guide 106 and is placed on the base 108 and a second shoulder 116 coplanar with the wall 102.
- the screen 114 is held against the base 108 by means of a stop ring 118 mounted coaxially around the sleeve 106.
- the underside of the heat shield 114 communicates with the internal volume of the envelope 12 through orifices 120 angularly distributed around the socket 106.
- the socket 106 Opposite the socket 106 is the fixed arcing contact 36 and coil 122 assembly. electromagnetic for rotating the arc.
- the presence of the heat shield 114 inside the breaking chamber 34 limits the heating of the plastic material of the base 108 of the support arm 62 following the thermal action of the arc resulting from the breaking of a strong current between the contacts arc 36, 38.
- the screen 114 also serves as a flame arrester preventing any propagation of ionized gases generated in the interrupting chamber 34 towards the outside of the cartridge 43. The hot gases emitted at the insulating base 108 are expelled in the direction of the arrow F through the exhaust ports 120 and cannot penetrate inside cartridge 43.
- the fixed arcing contact 36 is arranged inside the coil 122 annular and is shaped according to a clamp having a plurality of contact fingers 124 mounted in a groove 125 of a support member 126 fixed to the cover 100 by a screw fixing 128.
- the support member 126 is made of conductive metallic material, in particular copper stamped and has a notched washer 130 for adjusting the axial play between the end of the fixed arcing contact 36 and the arc sensing electrode 132.
- the electrode 132 is coplanar with the contact track 134 attached to the front face of the coil 122, and is used to energize coil 122 at the start of the opening stroke of the movable arcing contact 38.
- the coil 122 comprises a stack of conductive turns 136 electrically connected in series, said coil being connected on the opposite side of the track 134 to a magnetic circuit 138.
- the magnetic circuit 138 comprises a plate 140 made of ferromagnetic material, by example in steel, inserted between the side wall 102 of the cartridge 43 and the cover 100, and a cylindrical socket 142 arranged coaxially between the fixed arcing contact 36 and the coil 122. Assembly screws, one of which 144 is shown in Figure 3, pass through the turns 136 of the coil 122 and the contact track 134 for securing the coil 122 to the plate 140 of the magnetic circuit 138.
- An insulating sleeve 145 is interposed between the coil 122, and the fixed arcing contact 36 and socket 142 assembly.
- Spring blades 146 bear on the contact fingers 124 and the socket 142 to ensure the contact pressure when the movable arcing contact 38 is engaged with the fixed arcing contact 36 in the closed position A.
- the current enters through the fixing stud 66, and flows in the contact fingers 124 after passing through the connecting conductor 40 and the cover 100. After passing through the fixed arcing contacts 36 and movable arcing 38, the current will towards the crossing 16 via the braid 42 (see FIG. 1).
- the arc is switched to the electrode 132 authorizing the excitation of the coil 122.
- the terminal turns 136 of the coil 122 are fixed individually by auxiliary screws 150, 152, respectively to plate 140 and to contact track 134.
- the connection of additional screws 150, 152 guarantees good resistance mechanics of electromagnetic coil 122 despite the presence of forces electrodynamics of repulsion generated at the extreme turns.
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Circuit Breakers (AREA)
- Gas-Insulated Switchgears (AREA)
- Studio Devices (AREA)
Claims (10)
- Mittelspannungs-Leistungsschalter welcher,ein Isolierstoffgehäuse (12), das mit einem Gas hoher dielektrischer Festigkeit gefüllt ist und eine als Autoexpansions-Löschkammer (34) ausgebildete Schaltröhre (43) enthält,einen feststehenden Lichtbogenkontakt (36), der mit einem beweglichen Lichtbogenkontakt (38) zusammenwirkt,eine elektromagnetische Spule (122), die um den feststehenden Lichtbogenkontakt (36) herum angeordnet ist, um nach dem Umspringen des Lichtbogens auf eine Elektrode (132) ein magnetisches Feld im Abschaltgebiet zu erzeugen,sowie einen Isolierstoff-Stützarm (62) umfaßt, der an einem Ende der Schaltröhre (43) befestigt ist und eine Durchführungshülse (106) zur Führung des beweglichen Lichtbogenkontakts (38) aufweist,der Stützarm (62) einen mit Hilfe von Befestigungsmitteln (111) auf einem ersten Innenabsatz (110) der Schaltröhre (43) befestigten Auflagesitz (108) aufweistund die Führungshülse (106) von einer thermischen Abschirmung (114) umgeben ist, die sich auf dem Auflagesitz (108) sowie einem zweiten Absatz (116) der Schaltröhre (43) abstützt und dazu dient, die durch die thermische Einwirkung des Lichtbogens erzeugte Erwärmung des Kunststoffs des Auflagesitzes (108) zu begrenzen und einen Flammenschutz zu bilden, wobei die heißen Gase über im Auflagesitz (108) ausgebildete Ausströmöffnungen (120) in den Innenraum des Gehäuses (12) abgeleitet werden.
- Leistungsschalter nach Anspruch 1, dadurch gekennzeichnet, daß die thermische Abschirmung (114) als Scheibe aus Polytetrafluoräthylen ausgebildet ist, die mit Hilfe eines koaxial um die Führungshülse (106) herum geführten Sicherungsrings (118) in ihrer Andrucklage auf dem Auflagesitz (108) gehalten wird.
- Leistungsschalter nach Anspruch 1, dadurch gekennzeichnet, daß die Auffangelektrode (132) mit einer zur Lichtbogendrehung dienenden ringförmigen Kontaktbahn (134) fluchtet, wobei die genannte Kontaktbahn an die Vorderseite der Spule (122) angeschlossen und das gegenüberliegende Ende der Spule (122) über einen Eisenkreis (138) mit einem Stromzuführungsbolzen (66) verbunden ist.
- Leistungsschalter nach Anspruch 3, dadurch gekennzeichnet, daß der Eisenkreis (138) eine Scheibe (140) aus einem ferromagnetischen Werkstoff umfaßt, die mit der aus einem Leiterwerkstoff bestehenden Schaltröhre (43) verbunden ist.
- Leistungsschalter nach Anspruch 4, dadurch gekennzeichnet, daß die Scheibe (140) des Eisenkreises zwischen der Seitenwand (102) der Schaltröhre (43) und einem Deckel (100) angeordnet ist, der als Tragkörper für die Anordnung aus feststehendem Lichtbogenkontakt (36) und Spule (22) dient.
- Leistungsschalter nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Spule (122) aus aufeinanderliegenden Leiterwindungen (136) besteht, die über Verbindungsschrauben (144) mit dem Eisenkreis (138) verbunden sind, wobei die Endwindungen der Spule (122) über Hilfsschrauben (150, 152) einzeln am Eisenkreis (138) bzw. an der Kontaktbahn (134) befestigt sind.
- Leistungsschalter nach Anspruch 4, dadurch gekennzeichnet, daß der Eisenkreis (138) darüber hinaus eine Zylinderbuchse (142) umfaßt, die zwischen dem feststehendem Lichtbogenkontakt (36) und der Spule (122) koaxial angeordnet ist.
- Leistungsschalter nach Anspruch 7, dadurch gekennzeichnet, daß die Spule (122) und die Anordnung aus feststehendem Lichtbogenkontakt (36) und Buchse (142) in Radialrichtung durch einen Isolierstoffring (145) voneinander getrennt sind.
- Leistungsschalter nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß sich Federblätter (146) an den dem feststehenden Lichtbogenkontakt (36) zugeordneten Kontaktfingern (124) sowie an der Buchse (142) abstützen, um den Kontaktdruck zu gewährleisten, wenn in der Einschaltstellung der bewegliche Lichtbogenkontakt (38) in den feststehenden Lichtbogenkontakt (36) eingeschoben ist.
- Leistungsschalter nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der feststehende Lichtbogenkontakt (36) über die Kontaktfinger (124) mit einem verstellbaren Tragkörper (126) verbunden ist, der eine gestufte Metallscheibe (130) zur Einstellung des Axialabstands zwischen dem Ende des feststehenden Lichtbogenkontakts (36) und der Elektrode (132) umfaßt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9512308A FR2739972B1 (fr) | 1995-10-16 | 1995-10-16 | Disjoncteur electrique a gaz isolant et a autoexpansion |
FR9512308 | 1995-10-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0768692A1 EP0768692A1 (de) | 1997-04-16 |
EP0768692B1 true EP0768692B1 (de) | 2002-03-20 |
Family
ID=9483709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960410100 Expired - Lifetime EP0768692B1 (de) | 1995-10-16 | 1996-09-25 | Autoexpansionsschalter mit Isoliergas |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0768692B1 (de) |
CN (1) | CN1074577C (de) |
DE (1) | DE69619925D1 (de) |
EA (1) | EA000021B1 (de) |
ES (1) | ES2173263T3 (de) |
FR (1) | FR2739972B1 (de) |
NO (1) | NO314237B1 (de) |
TR (1) | TR199600815A3 (de) |
TW (1) | TW382719B (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10243825A1 (de) * | 2002-09-16 | 2004-03-25 | Siemens Ag | Leistungsschalter mit schwenkbarem Schaltmesser |
DE10244846A1 (de) * | 2002-09-20 | 2004-04-08 | Siemens Ag | Leistungsschalter mit Lichtbogenkühlelement |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2750531B1 (fr) * | 1996-06-28 | 1998-08-07 | Schneider Electric Sa | Dispositif de desionisation des gaz notamment des gaz de coupure dans une chambre d'extinction d'arc d'un disjoncteur basse tension a boitier moule et chambre d'extinction d'arc equipee de ce dispositif |
FR2774212B1 (fr) * | 1998-01-27 | 2000-03-10 | Schneider Electric Ind Sa | Chambre de coupure pour un disjoncteur a auto-expansion et a arc tournant |
FR2774210B1 (fr) * | 1998-01-27 | 2000-03-17 | Schneider Electric Ind Sa | Piece de contact mobile pour un disjoncteur a haute tension, et a auto-expansion |
FR2774213B1 (fr) * | 1998-01-27 | 2000-03-10 | Schneider Electric Ind Sa | Chambre de coupure d'un disjoncteur a auto-expansion et a enveloppe a resine thermoplastique |
FR2847069B1 (fr) * | 2002-11-07 | 2004-12-17 | Alstom | Disjoncteur a arc tournant equipe d'un reservoir de gaz |
IT202200006524A1 (it) * | 2022-04-01 | 2023-10-01 | Boffetti S P A | Gruppo interruttore-sezionatore a ingombro ridotto |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2703457C2 (de) * | 1977-01-28 | 1984-11-22 | Fritz Driescher KG Spezialfabrik für Elektrizitätswerksbedarf GmbH & Co, 5144 Wegberg | Mittelspannungs-Lastschalter |
FR2710452B1 (fr) * | 1993-09-20 | 1995-11-24 | Merlin Gerin | Interrupteur haute tension à arc tournant. |
FR2718281B1 (fr) * | 1994-03-30 | 1996-04-26 | Gec Alsthom T & D Sa | Disjoncteur à haute ou moyenne tension à bobine de soufflage. |
-
1995
- 1995-10-16 FR FR9512308A patent/FR2739972B1/fr not_active Expired - Fee Related
-
1996
- 1996-09-24 TW TW85111661A patent/TW382719B/zh active
- 1996-09-25 EP EP19960410100 patent/EP0768692B1/de not_active Expired - Lifetime
- 1996-09-25 ES ES96410100T patent/ES2173263T3/es not_active Expired - Lifetime
- 1996-09-25 DE DE69619925T patent/DE69619925D1/de not_active Expired - Lifetime
- 1996-10-15 NO NO19964389A patent/NO314237B1/no not_active IP Right Cessation
- 1996-10-15 EA EA199600084A patent/EA000021B1/ru not_active IP Right Cessation
- 1996-10-15 TR TR96/00815A patent/TR199600815A3/tr unknown
- 1996-10-16 CN CN96112441A patent/CN1074577C/zh not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10243825A1 (de) * | 2002-09-16 | 2004-03-25 | Siemens Ag | Leistungsschalter mit schwenkbarem Schaltmesser |
DE10243825B4 (de) * | 2002-09-16 | 2004-07-29 | Siemens Ag | Leistungsschalter mit schwenkbarem Schaltmesser |
DE10244846A1 (de) * | 2002-09-20 | 2004-04-08 | Siemens Ag | Leistungsschalter mit Lichtbogenkühlelement |
Also Published As
Publication number | Publication date |
---|---|
TW382719B (en) | 2000-02-21 |
NO964389L (no) | 1997-04-17 |
CN1151605A (zh) | 1997-06-11 |
EA000021B1 (ru) | 1997-12-30 |
EP0768692A1 (de) | 1997-04-16 |
TR199600815A2 (xx) | 1998-07-21 |
TR199600815A3 (tr) | 1998-07-21 |
NO964389D0 (no) | 1996-10-15 |
CN1074577C (zh) | 2001-11-07 |
ES2173263T3 (es) | 2002-10-16 |
FR2739972A1 (fr) | 1997-04-18 |
FR2739972B1 (fr) | 1997-12-05 |
DE69619925D1 (de) | 2002-04-25 |
NO314237B1 (no) | 2003-02-17 |
EA199600084A1 (ru) | 1997-06-30 |
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