EP0768692A1 - Autoexpansionsschalter mit Isoliergas - Google Patents

Autoexpansionsschalter mit Isoliergas Download PDF

Info

Publication number
EP0768692A1
EP0768692A1 EP96410100A EP96410100A EP0768692A1 EP 0768692 A1 EP0768692 A1 EP 0768692A1 EP 96410100 A EP96410100 A EP 96410100A EP 96410100 A EP96410100 A EP 96410100A EP 0768692 A1 EP0768692 A1 EP 0768692A1
Authority
EP
European Patent Office
Prior art keywords
contact
circuit breaker
coil
arcing contact
fixed
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
EP96410100A
Other languages
English (en)
French (fr)
Other versions
EP0768692B1 (de
Inventor
Denis Raphard
Raymond Soboul
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric SE
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 Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0768692A1 publication Critical patent/EP0768692A1/de
Application granted granted Critical
Publication of EP0768692B1 publication Critical patent/EP0768692B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H33/02—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 gas-forming plastic material of the support arm. Part of this gas can enter the cartridge, which disturbs the self-expanding effect, with the risk of re-striking the arc.
  • the object of the invention is to improve the breaking performance of a self-expanding circuit breaker.
  • 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 guide sleeve.
  • the arc capture electrode is coplanar with an annular contact track for rotating the arc, said track being connected to the front face of the coil.
  • the opposite end of the coil is connected to a current supply pad via a magnetic circuit.
  • the coil is excited through a ferromagnetic plate of a magnetic circuit, said plate being in electrical connection with the conductive cartridge.
  • the terminal turns of the coil are individually fixed by auxiliary screws respectively to the magnetic circuit and to the contact track.
  • the arcing contacts form a telescopic assembly, and spring blades bear on the contact fingers associated with the fixed arcing contact and the socket, to ensure the contact pressure when the contact d the moving arc is engaged inside the fixed arcing contact in the closed position.
  • an adjustable support member comprising a metal washer with notches for adjusting the axial clearance between the end of the fixed arc 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 directly connected to a disconnecting member 18 of the main circuit 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 movable main contact 22 pivotally mounted on an axis 24 of a first support bracket 26, which is secured to the second bushing 16 by fixing screws 28.
  • the casing 12 has a flange 29 closed by a cover 30 with the interposition of a seal 32.
  • Inside the casing 12 is an auxiliary circuit with breaking chamber 34 containing a pair of contacts of arc 36, 38, one of which 38 movable is mounted to slide longitudinally between a closed position where it is in engagement with the fixed arcing contact 36, and an open position for separating the arcing contacts 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, so as to constitute a parallel mounting. 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 a self-expanding and arc-extinguishing extinguishing device, 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 is effected by means of a rotary shaft 44, sealingly traversing the wall of the casing 12 while being coupled outside to a control (not shown). Inside 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 to the movable arcing contact 38 by a second link 50.
  • the articulation of the links 48, 50 takes place 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 arcing contacts 36, 38 after the main contacts 20, 22.
  • the interrupting chamber 34 comprises a lower support arm 62, extending perpendicular to the longitudinal axis of the cartridge 43 and the end of which is equipped an axis 64 of articulation.
  • the cartridge 43 is further provided with a pair of fixing studs 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 formed in an extension of the stirrup 26 for supporting the movable main contact 22.
  • the intermediate part of the connection conductor 40 is interposed between each stud 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.
  • the connecting braid 42 is connected to an intermediate conductor 82 having an end pad plated on the base of the bracket 26 by means of the screws 28.
  • the metallic cartridge 43 of the cutting chamber 34 has a cover 100 attached to a cylindrical wall 102 by fixing screws 104.
  • the cover 100 and the wall 102 are preferably made of an alloy of aluminum.
  • the insulating support arm 62 adapts to the lower part of the wall 102 is equipped with a cylindrical guide bush 106, and a base 108 fixed to 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 movable arc contact, 38.
  • the support arm 62 is produced by molding an insulating material, in particular based polycarbonate.
  • a heat shield 114 formed by a polytetrafluoroethylene plate, surrounds the guide sleeve 106 and is placed on the base 108 and a second shoulder 116 coplanar with the wall 102. Maintaining the screen 114 against the base 108 s' performed by means of a stop ring 118 mounted coaxially around the socket 106.
  • the underside of the heat shield 114 communicates with the internal volume of the casing 12 through orifices 120 augularly distributed around the socket 106 .
  • the presence of the heat shield 114 inside the cutting 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 cutting. a strong current between the arcing contacts 36, 38.
  • the screen 114 also serves as a flame arrester preventing any propagation of ionized gases generated in the breaking chamber 34 towards the outside of the cartridge 43.
  • the hot gases emitted at the level of the insulating base 108 are driven in the direction of the arrow F through the exhaust ports 120 and cannot penetrate inside the cartridge 43.
  • the fixed arcing contact 36 is arranged inside the annular coil 122 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 fixing screw 128.
  • the support member 126 is made of conductive metallic material, in particular of stamped copper and is provided with a washer 130 with notches for adjusting the axial clearance between the end of the fixed arcing contact 36 and the electrode 132 of arc capture.
  • the electrode 132 is coplanar with the contact track 134 attached to the front face of the coil 122, and is used to excite the 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 track 134 to a magnetic circuit 138.
  • the magnetic circuit 138 comprises a plate 140 made of ferromagnetic material, for example 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 FIG. 3, pass through the turns 136 of the coil 122 and the contact track 134 to secure 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 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 having passed through the connecting conductor 40 and the cover 100. After passing through the fixed arcing contacts 36 and mobile 38, the current goes to the crossing 16 via the braid 42 (see Figure 1).
  • the arc is switched over to the electrode 132 allowing the coil 122 to be excited.
  • the terminal coils 136 of the coil 122 are individually fixed by auxiliary screws 150, 152, respectively to the plate 140 and to the contact track 134.
  • the connection of the additional screws 150, 152 guarantees good mechanical resistance of the electromagnetic coil 122 despite the presence of the electrodynamic forces of repulsion generated at the extreme turns.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
  • Studio Devices (AREA)
  • Gas-Insulated Switchgears (AREA)
EP19960410100 1995-10-16 1996-09-25 Autoexpansionsschalter mit Isoliergas Expired - Lifetime EP0768692B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9512308 1995-10-16
FR9512308A FR2739972B1 (fr) 1995-10-16 1995-10-16 Disjoncteur electrique a gaz isolant et a autoexpansion

Publications (2)

Publication Number Publication Date
EP0768692A1 true EP0768692A1 (de) 1997-04-16
EP0768692B1 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 (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0932173A1 (de) * 1998-01-27 1999-07-28 Schneider Electric Sa Bewegbares Kontaktelement für Hochspannungsleistungsschalter, und expandierbar
EP0932176A1 (de) * 1998-01-27 1999-07-28 Schneider Electric Sa Lichtbogenkammer für Selbstbeblasender Lastschalter mit rotierendem Lichtbogen
EP0932177A1 (de) * 1998-01-27 1999-07-28 Schneider Electric Sa Lichtbogenkammer für einen Autoexpansionsschalter, und internes Gehäuse aus thermoplastischem Harz
EP1398810A2 (de) * 2002-09-16 2004-03-17 Siemens Aktiengesellschaft Leistungsschalter mit schwenkbarem Schaltmesser
EP1411535A1 (de) * 2002-09-20 2004-04-21 Siemens Aktiengesellschaft Leistungsschalter mit Lichtbogenkühlelement
FR2847069A1 (fr) * 2002-11-07 2004-05-14 Alstom Disjoncteur a arc tournant equipe d'un reservoir de gaz

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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
IT202200006524A1 (it) * 2022-04-01 2023-10-01 Boffetti S P A Gruppo interruttore-sezionatore a ingombro ridotto

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2703457A1 (de) * 1977-01-28 1978-08-03 Driescher Spezialfab Fritz Mittelspannungs-lastschalter
EP0644567A1 (de) * 1993-09-20 1995-03-22 Schneider Electric Sa Gasisolierter Hochspannungsschalter mit rotierendem Lichtbogen
FR2718281A1 (fr) * 1994-03-30 1995-10-06 Gec Alsthom T & D Sa Disjoncteur à haute ou moyenne tension à bobine de soufflage.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2703457A1 (de) * 1977-01-28 1978-08-03 Driescher Spezialfab Fritz Mittelspannungs-lastschalter
EP0644567A1 (de) * 1993-09-20 1995-03-22 Schneider Electric Sa Gasisolierter Hochspannungsschalter mit rotierendem Lichtbogen
FR2718281A1 (fr) * 1994-03-30 1995-10-06 Gec Alsthom T & D Sa Disjoncteur à haute ou moyenne tension à bobine de soufflage.

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0932173A1 (de) * 1998-01-27 1999-07-28 Schneider Electric Sa Bewegbares Kontaktelement für Hochspannungsleistungsschalter, und expandierbar
EP0932176A1 (de) * 1998-01-27 1999-07-28 Schneider Electric Sa Lichtbogenkammer für Selbstbeblasender Lastschalter mit rotierendem Lichtbogen
EP0932177A1 (de) * 1998-01-27 1999-07-28 Schneider Electric Sa Lichtbogenkammer für einen Autoexpansionsschalter, und internes Gehäuse aus thermoplastischem Harz
FR2774212A1 (fr) * 1998-01-27 1999-07-30 Schneider Electric Ind Sa Chambre de coupure pour un disjoncteur a auto-expansion et a arc tournant
FR2774210A1 (fr) * 1998-01-27 1999-07-30 Schneider Electric Ind Sa Piece de contact mobile pour un disjoncteur a haute tension, et a auto-expansion
FR2774213A1 (fr) * 1998-01-27 1999-07-30 Schneider Electric Ind Sa Chambre de coupure d'un disjoncteur a auto-expansion et a enveloppe a resine thermoplastique
AU735933B2 (en) * 1998-01-27 2001-07-19 Schneider Electric Sa An extinguishing chamber for a circuit breaker with self-extinguishing expansion and rotating arc
AU738593B2 (en) * 1998-01-27 2001-09-20 Schneider Electric Sa An extinguishing chamber of a circuit breaker with self-extinguishing expansion, and a thermoplastic resin enclosure
EP1398810A2 (de) * 2002-09-16 2004-03-17 Siemens Aktiengesellschaft Leistungsschalter mit schwenkbarem Schaltmesser
EP1398810A3 (de) * 2002-09-16 2005-12-14 Siemens Aktiengesellschaft Leistungsschalter mit schwenkbarem Schaltmesser
EP1411535A1 (de) * 2002-09-20 2004-04-21 Siemens Aktiengesellschaft Leistungsschalter mit Lichtbogenkühlelement
FR2847069A1 (fr) * 2002-11-07 2004-05-14 Alstom Disjoncteur a arc tournant equipe d'un reservoir de gaz

Also Published As

Publication number Publication date
TW382719B (en) 2000-02-21
FR2739972A1 (fr) 1997-04-18
DE69619925D1 (de) 2002-04-25
NO314237B1 (no) 2003-02-17
EA199600084A1 (ru) 1997-06-30
NO964389L (no) 1997-04-17
FR2739972B1 (fr) 1997-12-05
EA000021B1 (ru) 1997-12-30
NO964389D0 (no) 1996-10-15
CN1074577C (zh) 2001-11-07
ES2173263T3 (es) 2002-10-16
TR199600815A2 (xx) 1998-07-21
EP0768692B1 (de) 2002-03-20
CN1151605A (zh) 1997-06-11
TR199600815A3 (tr) 1998-07-21

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