CA1314919C - Rotating arc and expansion circuit breaker - Google Patents
Rotating arc and expansion circuit breakerInfo
- Publication number
- CA1314919C CA1314919C CA000570470A CA570470A CA1314919C CA 1314919 C CA1314919 C CA 1314919C CA 000570470 A CA000570470 A CA 000570470A CA 570470 A CA570470 A CA 570470A CA 1314919 C CA1314919 C CA 1314919C
- Authority
- CA
- Canada
- Prior art keywords
- contact
- end plate
- circuit breaker
- arcing
- movable
- 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
Links
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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
-
- 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
- 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
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
-
- 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
Abstract
ABSTRACT
ROTATING ARC AND EXPANSION CIRCUIT BREAKER
A circuit breaker with expansion and rotating arc in sulphur hexafluoride comprising a metal breaking chamber supporting a stationary main contact capable of cooperating with a movable main contact. The breaking chamber comprises an insulating end plate away from the breaking area and an opposite metal end plate close to the breaking area and supporting a coil or a permanent blowout magnet by rotation of the arc drawn between the arcing contacts housed inside the breaking chamber.
Refer to figure 1.
ROTATING ARC AND EXPANSION CIRCUIT BREAKER
A circuit breaker with expansion and rotating arc in sulphur hexafluoride comprising a metal breaking chamber supporting a stationary main contact capable of cooperating with a movable main contact. The breaking chamber comprises an insulating end plate away from the breaking area and an opposite metal end plate close to the breaking area and supporting a coil or a permanent blowout magnet by rotation of the arc drawn between the arcing contacts housed inside the breaking chamber.
Refer to figure 1.
Description
131491q ROTATING A~C AND ~XPANSION CIRCUIT BREAKER
BACKGROUND OF THE INVENTION
_ The invention relates to a circuit breaker with a sealed enclosure filled with a high dielectric strength gas and containing one or more poles of the circuit breaker, each pole comprising :
- a breaking charnber having a revolution surface tightly sealed at both its ends by end plates - a pair of tubular arcing contacts, coaxially arranged in said breaking chamber and each passing through one of said end plates to make the breaking chamber communicate~, in the separated position of the arcing contacts~ with said enclosure forming an expansion chamber via the gas outflow channels constituted by the tubular arcing contacts - a coil or a permanent magnet supported by one of said end plates inside the breaking chamber so as to create in the arcing contact separation area a magnetic blowout field by rotation of an arc drawn between the separated arclng contacts - a pair of main contacts disposed outside the breaking chamber and arranged to open before the arcing contacts separate when a circuit breaker opening operation takes p}ace.
A state-of-the-art circuit breaker combines pneumatic arc blowout by expansion gases with magnetic arc blowout by rotation on annular electrodes. This breaking method can be used in rnedium or high voltage circuit breakers and has the advantage of requiring low operating forces. It has already been proposed to fit, in addition to the arcing contact ensuring breaking of the current, main contacts conducting the rated current and opening t 3 1 ~
before separation of the arcing contacts takes place. These state-of-the-art devices are complicated and require elaborate electrical connections.
;..
The object of the invention is to achieve a circuit breaker of particularly simple structure and architecture enabling the current conducting and breaking functions to be separated.
SUMMARY OF THE INVENTION
The circui~ breaker according to the invention is characterized in that said revolution surface and the end plate supporting the coil or permanent magnet are made of metal and electrically connected to the arcing contact passing through this end plate, the other end plate being made of insulating material to provide electrical insulation in the open position of the contacts and that the annular edge of said revolution surface, adjacent to the insulating end plate is arranged as or supports the stationary main contact.
The revolution surface, in this instance the cylindrical sur~ace o the breaking chamber and the end plate adjacent to the breaking area are made of metal and are used to support or constitute the stationary main contact and its connection to the stationary arcing contact arranged as the current input conductor. The opposite end plate of the breaking chamber is away from the breaking area and being less subjected to thermal and mechanical stresses, it can be made of insulating material ?roviding the electrical insulation in the open position of the circuit breaker. This insulating end plate is advantageously cone-shaped and comprises a cylindrical metal insert surrounding the movable contact with small clearance and electrically connected to the latter, for example by a friction contact formed by an elastic ring. The movable main contact is supported and electrically connected to the movable arcing contact, which 1 3 1 49 1 q simplifies manufacture and assembly of the switchgear device.
'rhe stationary main contact and movable main contact assembly is arranged in the extension of the breaking chamber respecting the dimensions of thè latter. The main contacts advantageously comprise a tulip-~inger contact which may be either securedly fixed to the movable part or securedly fixed to the stationary part of these contacts~ According to an alternative em~odiment, ~he tulip-finger contact can be arranged as a contact bridge cooperating with two stationary main contacts disposed facing one another. Each pole can be housed in an individual enclosure in the shape of a coaxial cylinder and external to the breaking chamber or all the circuit brèaker poles can be disposed inside a common enclosure of suitable shape. The invention is applicable to a circuit breaker with magnetic arc blowout by a coil, switched into the circuit when the main contacts open or when the arc switshes onto an electrode or with magnetic arc blowout by a permanent magnet. The invention is described hereinafter as being applied ~o a circuit breaker with double pneumatic blowout via the two tubular-shaped arcing contacts but it is applicable to a circuit breake!r with single blowout, notably by the gases escaping via the movable contact.
BRIEF DESCRIPTION OF THE DRAWINGS
Other advantages and features will become more clearly apparent from the following description of various illustrative embodiments of the invention, given as non-restrictive examples only and represented in the accompanying drawings, in which :
- ~igure 1 is a schematic axial sectional view of a circuit breaker according to the invention, the right-hand half-section representing this cixcuit breaker in the closed position and the left-hand half-section in the open position;
- Figure 2 is a cross-section according to the lin~ II-II of 13~19 figure 1 ;
- Figure 3 is a partial view on an enlarged scale of an alternative embodlment of the breaking chamber according to figure l;
- ~igures 4 and 5 are similar views to that of figure 3, illustrating two alternative embodiments of the invention.
~ =
In the figures, a pole of a medium voltage or high voltage switch comprises an enclosure 10 confined by a cylindrical casing 12, sealed at its ends by two end plates 14 t 16. The enclosure 10 is filled with a high dielectric strength gas, notably sulphur hexafluoride at atmospheric pressure or at overpressure. The cylindrical casing 12 may~be of insulating material and the end plates 14, 16 of conducting material constitute current input terminal pads. An operating rod 18, disposed in the axis of the enclosure 10, passes tightly through the end plate 16 and is extended inside the enclosure 10 by a tubular movable contact 20. The tubular movable contact 20 supports at its end a movable arcing contact 22, cooperating with a stationary arcing contact 24 supported~by the opposite end plate 14. A breaking chamber 26, formed by a cylindrical surface 28 and two end plates 30, 32, coaxi~ally;surrounds the arcing contacts 22, 24. The cylindrical surface 28 and the end plate 30 adjacent to the stationary contact 24 are made of metal and electrically connected to the stationary contact 24. The opposite end plate 32, through which the movable contact 20 passes, is made of insulating material ensuring electrical insulation between the movable contact 20 and the cylindrical surface 28. Inside the breaking chamber 26 there is disposed a coil 34 adjoined to the metal end plate 30. The coil 34 of a well-known type is capped by an electrode 36 forming an arc t~l~9~
migration track disposed facing the movable arcing contact 22.
The coil 34 is electrically connected on the one hand to the electrode 36 and on the other hand to the end plate 30 so as to be inserted in series between the movable arcing contact 22 and the stationary contact 24 in the closed position of the circuit breaker. In the open position of the circuit breaker represented in the left-hand part of figure 1, the breaking chamber 26 communicates with the enclosure 10 9 which constitutes an expansion chamber, on the one hand via the tubular movable contact 20 whose base has communication orifices 38 between the tubular inside of the contact and -the enclosure 10 and on the other hand via the tubular-shaped stationary contact 24, which is extended through the coil 34 by a central channel 40 and which communicates with the enclosure 10 at its base by orifices 42. In the closed position of the circuit breaker represented in the right-hand half-view of figure 1, the movable arcing contact 22 is in abutment with the electrode 36 blocking off the two exhaust channels constituted by the contacts 20, 24. The movable arcing contact 22 is a semi-fixed telescopic contact biased by a spring 44 to an extension position. A sliding contact 46, supported by the end plate 16 of the enclosure 10, cooperates with the movable contact 20 to provide the electrical connection of this movable contact 20 and of the current in2ut terminal pad pad constituted by this end plate 16.
The cylindrical surface 28 of tAe brea~ing chamber 26 is extended beyond the insulating end plate 32 by a flange 48 arranged as the stationary main contact. The stationary main contact 48 cooperates with a movable main contact 50 constituted by a tulip-finger contact borne by a support 52 securedly fixed to the movable contact 20. The fingers of the tulip contact S0 cooperate with the internal surface of the flange 48 so as to respect the dimensions of the breaking chamber 26, b~it it is clear that a reverse arrangement so as to grip the flange 48 externally can be used when the dimension of the main contacts . q I ~
is secondary.
Operation of the switch according to the invention is evident from the foregoing description :
In the closed position of the circuit breaker represented in the right-hand half-view of figure 1, the current input at a givèn mome~t via the terminal pad 16 flows throuyh the sliding contact 46, the movable contact 20, the support 52, the tulip-finger contact 50, the main contact 48, the cylindrical surface 28, the conducting end plate 30, the stationary contact 24 and the output terminal pad 14. A small fraction of the current flows through a parallel circuit formed by the movable arcing contact 22, the electrode 36, the coil 34 and the conducting end plate 30. Opening of the circuit breaker is controled by downwards sliding in figure 1 of the operating rod 18 which moves the tulip-finger main contact SO downwards to a separation position of the stationary main contact 48. During a first phase of the~
circuit breaker opening movement, the telescopically mounted movable arcing contact 22 remains in abutment with the electrode 36 due to the action of the spring 44. As soon as the main contacts 48, 50 separate, the current is switched to the parallel circuit formed by the movable arcing contact 22 and the~
coil 34. Opening of the màin contacts 48, 50~takes place without an arc forming and as soon as the current is switched to the parallel circuit, the coil 34 generates a magnetic ~ield which blows out the arc forming when the arcing contacts 22j 36 separate in the course of the continued opening movement of the circuit breaker. The arc drawn into~ the breaking chamber 26 causes a temperature rise and a pressure increase of the gas contained in this chamber, which gas escapes via the tubular contacts 20, 24 to the expansion chamber formed by the enclosure 10, pneumatically blowing out the arc extending between the movable arcing contact 22 and the electrode 36. The combined action of rotational blowing of the arc and pneumatic blowing by ' -.
~ 31 4q t 9 expansion ensures high-speed arc extinction. The breaking area is disposed in the vicinity of the metal end plate 30 of the breaking chamber 26 whereas the opposite end plate made of insulating materia~ 32 is located away from and protected from the action of the arcr By disposing the insulating end plate 32 away from the breaking area, the risks of pollution and breakdown are limited while at the same time arranging a breaking chamber 26 with a cylindrical metal enclosure 28 ensuring electrical connection of the stationary main contact 48 and the stationary contact 24. The overall assembly is particularly simple and compact.
In the example described above, the coil 34 is switched into the circuit as soon as the main contacts 48, 50 open but it is clear that this switching into circuit can be achieved in a manner known in itself by switching o~ the arc onto the electrode 36.
The coil 34 can also be replaced by a permanent magnet and the pneumatic blowout can be performed via one of the contacts, notably the movable contact 20. A multipole circuit breaker is constituted by an association of several poles but an enclosure 10 common to all the circuit breaker poles can be used, the shape of the enclosure naturally being suited to the disposition of the poles inside this enclosure.
The structure of the main contacts 48, S0 ~ay be different and two alternative embodiments are described hereinafter as examples with reference to figures 3 and 4. In these figures, the same reference numbers are used to designate identical or similar parts to those in fiyure 1.
In figure 3, the movable contact 20 supports a movable main contact 54 in the form of a tulip-finger contact bridge. In the closed position of the circuit breaker represented in the right-hand half-view, the tulip-finger contact bridge 54 cooperates on the one hand with the stationary main contact 48 supported by 13~1q the breaking chamber 26 and on the other hand with a cylindrical stationary contact 56 electrically connected to the current input terminal pad 16. When breaking of the circuit breaker occurs, the bridge contact 54 is retracted inside the cylindrical stationary contact 56 separating from the stationary main contact 48 in the manner described above. This arrangement of the main contacts in a contact bridge enables a better separ~ation of the main current circuit and of the shunt circui~
but the operation is not modified.
According to the alternative embodiment illustrated by figure 4, a tulip-finger main contact 58 is supported by the cylindrical surface 28 of the breaking chamber 26, this tulip-finger contact 58 extending in the direction of a cylindrical-shaped movable main contact 60 securedly fixed to the movable contact 20. By associating the tulip-finger contact 58 with the fixed part of the circuit breaker, the weight of the movable assembly is reduced enabling a notably greater contact separation speed to be achieved.
:
The insulating end plate 32 of the breaking chamber 16 bears a flange 62 of insulating or conducting material, fitted between the main contacts 58, 60 and the movable contact 20. A flange 62 of this kind can be used on the alternative embodiments described.
~igure 5 illustrates a preferred embodiment of the insulating end plate 32, which can naturally be used in the alternative embodiments. The insulating end plate 32 is cone-shaped to increase the creepage distance and provide improved dielectric strength. Between the movable contact 20 and the insulating end plate 32, a metal insert 64 is fitted surrounding the movable contact 20 with small clearance and electrically connected to this movable contact 20 by a sliding contact formed by an elastic metal ring 66 housed in an annular groove o~ the insert .
.
- ': . .
131~9Iq 64 fa~ing the movable contact 20. Any risk of firing in the air gap allowing relative sliding b~tween the movable contact 20 and the insulating end plate 32 is thus avoided.
.
BACKGROUND OF THE INVENTION
_ The invention relates to a circuit breaker with a sealed enclosure filled with a high dielectric strength gas and containing one or more poles of the circuit breaker, each pole comprising :
- a breaking charnber having a revolution surface tightly sealed at both its ends by end plates - a pair of tubular arcing contacts, coaxially arranged in said breaking chamber and each passing through one of said end plates to make the breaking chamber communicate~, in the separated position of the arcing contacts~ with said enclosure forming an expansion chamber via the gas outflow channels constituted by the tubular arcing contacts - a coil or a permanent magnet supported by one of said end plates inside the breaking chamber so as to create in the arcing contact separation area a magnetic blowout field by rotation of an arc drawn between the separated arclng contacts - a pair of main contacts disposed outside the breaking chamber and arranged to open before the arcing contacts separate when a circuit breaker opening operation takes p}ace.
A state-of-the-art circuit breaker combines pneumatic arc blowout by expansion gases with magnetic arc blowout by rotation on annular electrodes. This breaking method can be used in rnedium or high voltage circuit breakers and has the advantage of requiring low operating forces. It has already been proposed to fit, in addition to the arcing contact ensuring breaking of the current, main contacts conducting the rated current and opening t 3 1 ~
before separation of the arcing contacts takes place. These state-of-the-art devices are complicated and require elaborate electrical connections.
;..
The object of the invention is to achieve a circuit breaker of particularly simple structure and architecture enabling the current conducting and breaking functions to be separated.
SUMMARY OF THE INVENTION
The circui~ breaker according to the invention is characterized in that said revolution surface and the end plate supporting the coil or permanent magnet are made of metal and electrically connected to the arcing contact passing through this end plate, the other end plate being made of insulating material to provide electrical insulation in the open position of the contacts and that the annular edge of said revolution surface, adjacent to the insulating end plate is arranged as or supports the stationary main contact.
The revolution surface, in this instance the cylindrical sur~ace o the breaking chamber and the end plate adjacent to the breaking area are made of metal and are used to support or constitute the stationary main contact and its connection to the stationary arcing contact arranged as the current input conductor. The opposite end plate of the breaking chamber is away from the breaking area and being less subjected to thermal and mechanical stresses, it can be made of insulating material ?roviding the electrical insulation in the open position of the circuit breaker. This insulating end plate is advantageously cone-shaped and comprises a cylindrical metal insert surrounding the movable contact with small clearance and electrically connected to the latter, for example by a friction contact formed by an elastic ring. The movable main contact is supported and electrically connected to the movable arcing contact, which 1 3 1 49 1 q simplifies manufacture and assembly of the switchgear device.
'rhe stationary main contact and movable main contact assembly is arranged in the extension of the breaking chamber respecting the dimensions of thè latter. The main contacts advantageously comprise a tulip-~inger contact which may be either securedly fixed to the movable part or securedly fixed to the stationary part of these contacts~ According to an alternative em~odiment, ~he tulip-finger contact can be arranged as a contact bridge cooperating with two stationary main contacts disposed facing one another. Each pole can be housed in an individual enclosure in the shape of a coaxial cylinder and external to the breaking chamber or all the circuit brèaker poles can be disposed inside a common enclosure of suitable shape. The invention is applicable to a circuit breaker with magnetic arc blowout by a coil, switched into the circuit when the main contacts open or when the arc switshes onto an electrode or with magnetic arc blowout by a permanent magnet. The invention is described hereinafter as being applied ~o a circuit breaker with double pneumatic blowout via the two tubular-shaped arcing contacts but it is applicable to a circuit breake!r with single blowout, notably by the gases escaping via the movable contact.
BRIEF DESCRIPTION OF THE DRAWINGS
Other advantages and features will become more clearly apparent from the following description of various illustrative embodiments of the invention, given as non-restrictive examples only and represented in the accompanying drawings, in which :
- ~igure 1 is a schematic axial sectional view of a circuit breaker according to the invention, the right-hand half-section representing this cixcuit breaker in the closed position and the left-hand half-section in the open position;
- Figure 2 is a cross-section according to the lin~ II-II of 13~19 figure 1 ;
- Figure 3 is a partial view on an enlarged scale of an alternative embodlment of the breaking chamber according to figure l;
- ~igures 4 and 5 are similar views to that of figure 3, illustrating two alternative embodiments of the invention.
~ =
In the figures, a pole of a medium voltage or high voltage switch comprises an enclosure 10 confined by a cylindrical casing 12, sealed at its ends by two end plates 14 t 16. The enclosure 10 is filled with a high dielectric strength gas, notably sulphur hexafluoride at atmospheric pressure or at overpressure. The cylindrical casing 12 may~be of insulating material and the end plates 14, 16 of conducting material constitute current input terminal pads. An operating rod 18, disposed in the axis of the enclosure 10, passes tightly through the end plate 16 and is extended inside the enclosure 10 by a tubular movable contact 20. The tubular movable contact 20 supports at its end a movable arcing contact 22, cooperating with a stationary arcing contact 24 supported~by the opposite end plate 14. A breaking chamber 26, formed by a cylindrical surface 28 and two end plates 30, 32, coaxi~ally;surrounds the arcing contacts 22, 24. The cylindrical surface 28 and the end plate 30 adjacent to the stationary contact 24 are made of metal and electrically connected to the stationary contact 24. The opposite end plate 32, through which the movable contact 20 passes, is made of insulating material ensuring electrical insulation between the movable contact 20 and the cylindrical surface 28. Inside the breaking chamber 26 there is disposed a coil 34 adjoined to the metal end plate 30. The coil 34 of a well-known type is capped by an electrode 36 forming an arc t~l~9~
migration track disposed facing the movable arcing contact 22.
The coil 34 is electrically connected on the one hand to the electrode 36 and on the other hand to the end plate 30 so as to be inserted in series between the movable arcing contact 22 and the stationary contact 24 in the closed position of the circuit breaker. In the open position of the circuit breaker represented in the left-hand part of figure 1, the breaking chamber 26 communicates with the enclosure 10 9 which constitutes an expansion chamber, on the one hand via the tubular movable contact 20 whose base has communication orifices 38 between the tubular inside of the contact and -the enclosure 10 and on the other hand via the tubular-shaped stationary contact 24, which is extended through the coil 34 by a central channel 40 and which communicates with the enclosure 10 at its base by orifices 42. In the closed position of the circuit breaker represented in the right-hand half-view of figure 1, the movable arcing contact 22 is in abutment with the electrode 36 blocking off the two exhaust channels constituted by the contacts 20, 24. The movable arcing contact 22 is a semi-fixed telescopic contact biased by a spring 44 to an extension position. A sliding contact 46, supported by the end plate 16 of the enclosure 10, cooperates with the movable contact 20 to provide the electrical connection of this movable contact 20 and of the current in2ut terminal pad pad constituted by this end plate 16.
The cylindrical surface 28 of tAe brea~ing chamber 26 is extended beyond the insulating end plate 32 by a flange 48 arranged as the stationary main contact. The stationary main contact 48 cooperates with a movable main contact 50 constituted by a tulip-finger contact borne by a support 52 securedly fixed to the movable contact 20. The fingers of the tulip contact S0 cooperate with the internal surface of the flange 48 so as to respect the dimensions of the breaking chamber 26, b~it it is clear that a reverse arrangement so as to grip the flange 48 externally can be used when the dimension of the main contacts . q I ~
is secondary.
Operation of the switch according to the invention is evident from the foregoing description :
In the closed position of the circuit breaker represented in the right-hand half-view of figure 1, the current input at a givèn mome~t via the terminal pad 16 flows throuyh the sliding contact 46, the movable contact 20, the support 52, the tulip-finger contact 50, the main contact 48, the cylindrical surface 28, the conducting end plate 30, the stationary contact 24 and the output terminal pad 14. A small fraction of the current flows through a parallel circuit formed by the movable arcing contact 22, the electrode 36, the coil 34 and the conducting end plate 30. Opening of the circuit breaker is controled by downwards sliding in figure 1 of the operating rod 18 which moves the tulip-finger main contact SO downwards to a separation position of the stationary main contact 48. During a first phase of the~
circuit breaker opening movement, the telescopically mounted movable arcing contact 22 remains in abutment with the electrode 36 due to the action of the spring 44. As soon as the main contacts 48, 50 separate, the current is switched to the parallel circuit formed by the movable arcing contact 22 and the~
coil 34. Opening of the màin contacts 48, 50~takes place without an arc forming and as soon as the current is switched to the parallel circuit, the coil 34 generates a magnetic ~ield which blows out the arc forming when the arcing contacts 22j 36 separate in the course of the continued opening movement of the circuit breaker. The arc drawn into~ the breaking chamber 26 causes a temperature rise and a pressure increase of the gas contained in this chamber, which gas escapes via the tubular contacts 20, 24 to the expansion chamber formed by the enclosure 10, pneumatically blowing out the arc extending between the movable arcing contact 22 and the electrode 36. The combined action of rotational blowing of the arc and pneumatic blowing by ' -.
~ 31 4q t 9 expansion ensures high-speed arc extinction. The breaking area is disposed in the vicinity of the metal end plate 30 of the breaking chamber 26 whereas the opposite end plate made of insulating materia~ 32 is located away from and protected from the action of the arcr By disposing the insulating end plate 32 away from the breaking area, the risks of pollution and breakdown are limited while at the same time arranging a breaking chamber 26 with a cylindrical metal enclosure 28 ensuring electrical connection of the stationary main contact 48 and the stationary contact 24. The overall assembly is particularly simple and compact.
In the example described above, the coil 34 is switched into the circuit as soon as the main contacts 48, 50 open but it is clear that this switching into circuit can be achieved in a manner known in itself by switching o~ the arc onto the electrode 36.
The coil 34 can also be replaced by a permanent magnet and the pneumatic blowout can be performed via one of the contacts, notably the movable contact 20. A multipole circuit breaker is constituted by an association of several poles but an enclosure 10 common to all the circuit breaker poles can be used, the shape of the enclosure naturally being suited to the disposition of the poles inside this enclosure.
The structure of the main contacts 48, S0 ~ay be different and two alternative embodiments are described hereinafter as examples with reference to figures 3 and 4. In these figures, the same reference numbers are used to designate identical or similar parts to those in fiyure 1.
In figure 3, the movable contact 20 supports a movable main contact 54 in the form of a tulip-finger contact bridge. In the closed position of the circuit breaker represented in the right-hand half-view, the tulip-finger contact bridge 54 cooperates on the one hand with the stationary main contact 48 supported by 13~1q the breaking chamber 26 and on the other hand with a cylindrical stationary contact 56 electrically connected to the current input terminal pad 16. When breaking of the circuit breaker occurs, the bridge contact 54 is retracted inside the cylindrical stationary contact 56 separating from the stationary main contact 48 in the manner described above. This arrangement of the main contacts in a contact bridge enables a better separ~ation of the main current circuit and of the shunt circui~
but the operation is not modified.
According to the alternative embodiment illustrated by figure 4, a tulip-finger main contact 58 is supported by the cylindrical surface 28 of the breaking chamber 26, this tulip-finger contact 58 extending in the direction of a cylindrical-shaped movable main contact 60 securedly fixed to the movable contact 20. By associating the tulip-finger contact 58 with the fixed part of the circuit breaker, the weight of the movable assembly is reduced enabling a notably greater contact separation speed to be achieved.
:
The insulating end plate 32 of the breaking chamber 16 bears a flange 62 of insulating or conducting material, fitted between the main contacts 58, 60 and the movable contact 20. A flange 62 of this kind can be used on the alternative embodiments described.
~igure 5 illustrates a preferred embodiment of the insulating end plate 32, which can naturally be used in the alternative embodiments. The insulating end plate 32 is cone-shaped to increase the creepage distance and provide improved dielectric strength. Between the movable contact 20 and the insulating end plate 32, a metal insert 64 is fitted surrounding the movable contact 20 with small clearance and electrically connected to this movable contact 20 by a sliding contact formed by an elastic metal ring 66 housed in an annular groove o~ the insert .
.
- ': . .
131~9Iq 64 fa~ing the movable contact 20. Any risk of firing in the air gap allowing relative sliding b~tween the movable contact 20 and the insulating end plate 32 is thus avoided.
.
Claims (10)
1. A circuit breaker with a sealed enclosure (10) filled with a high dielectric strength gas and containing one or more poles of the circuit breaker, each pole comprising :
- a breaking chamber (26) having a revolution surface (28) tightly sealed at both its ends by end plates (30, 32), - a pair of arcing contacts (20, 22; 24, 36) at least one of which is tubular, coaxially arranged in said breaking chamber (26) and each passing through one of said end plates (30, 32) to make the breaking chamber communicate, in the separated position of the arcing contacts, with said enclosure forming an expansion chamber (10) via gas outflow channels constituted by the tubular arcing contact or contacts, - a coil (34) or a permanent magnet supported by one (30) of said end plates inside the breaking chamber (26) so as to create in the arcing contact separation area a magnetic blowout field by rotation of an arc drawn between the separated arcing contacts, - a pair of main contacts (48, 50; 48, 54, 56; 58, 60) disposed outside the breaking chamber (26) and arranged to open before the arcing contacts separate when a circuit breaker opening operation takes place, wherein said revolution surface (28) and the end plate (30) supporting the coil (34) or permanent magnet are made of metal and electrically connected to the arcing contact (24) passing through this end plate, the other end plate (32) being made of insulating material to provide electrical insulation in the open position of the contacts and wherein the annular edge of said revolution surface (28), adjacent to the insulating end plate (32) is arranged as or supports the stationary main contact (48, 58).
- a breaking chamber (26) having a revolution surface (28) tightly sealed at both its ends by end plates (30, 32), - a pair of arcing contacts (20, 22; 24, 36) at least one of which is tubular, coaxially arranged in said breaking chamber (26) and each passing through one of said end plates (30, 32) to make the breaking chamber communicate, in the separated position of the arcing contacts, with said enclosure forming an expansion chamber (10) via gas outflow channels constituted by the tubular arcing contact or contacts, - a coil (34) or a permanent magnet supported by one (30) of said end plates inside the breaking chamber (26) so as to create in the arcing contact separation area a magnetic blowout field by rotation of an arc drawn between the separated arcing contacts, - a pair of main contacts (48, 50; 48, 54, 56; 58, 60) disposed outside the breaking chamber (26) and arranged to open before the arcing contacts separate when a circuit breaker opening operation takes place, wherein said revolution surface (28) and the end plate (30) supporting the coil (34) or permanent magnet are made of metal and electrically connected to the arcing contact (24) passing through this end plate, the other end plate (32) being made of insulating material to provide electrical insulation in the open position of the contacts and wherein the annular edge of said revolution surface (28), adjacent to the insulating end plate (32) is arranged as or supports the stationary main contact (48, 58).
2. The circuit breaker according to claim 1, wherein the insulating end plate (32) of the breaking chamber (26) has passing through it the sliding movable arcing contact (20, 22) which cooperates with a stationary arcing contact (24, 36) passing through the metal end plate (30) to which it is electrically and mechanically connected.
3. The circuit breaker according to claim 1, wherein the contact area of the arcing contacts (20, 22; 24, 36) is offset in the axial direction to the side of the metal end plate (30) supporting the coil (34) or the permanent magnet.
4. The circuit breaker according to claim 1, wherein the magnetic arc blowout coil (34) comprises one face adjoined and electrically connected to the metal end plate (30), the other face being capped and connected to an annular electrode forming an arc migration track associated with the stationary arcing contact (24) which passes axially through the coil.
5. The circuit breaker according to claim 1, wherein the tubular movable arcing contact (20, 22) passes through the insulating end plate (32) of the breaking chamber (26) and is extended by an operating rod (18) passing tightly through the sealed enclosure (10) and wherein the tulip-finger movable main contact (50) is securedly fixed to the movable arcing contact and operating rod assembly.
6. The device according to claim 1, wherein the movable main contact is formed by a tulip-finger contact bridge (54) securedly fixed to the movable arcing contact (20, 22) and capable of bridging, in the closed position of the circuit breaker, an insulation gap between two stationary main contacts (48, 56) facing one another.
7. The device according to claim 1, wherein said annular edge of said revolution surface (28) bears a tulip-finger stationary main contact (58) capable of cooperating with a movable main contact in the shape of a cylindrical ring (60).
8. The device according to claim 1, wherein the cone-shaped insulating end plate (32) comprises a metal insert (64) surrounding with small clearance the movable arcing contact (22) to which said insert is electrically connected.
9. The device according to claim 1, wherein said enclosure (10) bears two connection terminal pads (14, 16) respectively connected to the stationary arcing contact (24) and to the movable arcing contact (20, 22) arranged as current input conductors.
10. The device according to claim 1, wherein said enclosure (10) is cylindrical and contains a single pole axially disposed inside the enclosure, the breaking chamber (26) also being cylindrical.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8709524 | 1987-07-02 | ||
| FR8709524A FR2617633B1 (en) | 1987-07-02 | 1987-07-02 | CIRCUIT BREAKER WITH ROTATING ARC AND EXPANSION |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1314919C true CA1314919C (en) | 1993-03-23 |
Family
ID=9352883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000570470A Expired - Fee Related CA1314919C (en) | 1987-07-02 | 1988-06-27 | Rotating arc and expansion circuit breaker |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US4900882A (en) |
| EP (1) | EP0298809B1 (en) |
| JP (1) | JP2746379B2 (en) |
| KR (1) | KR0129003B1 (en) |
| CN (1) | CN1018965B (en) |
| BR (1) | BR8803290A (en) |
| CA (1) | CA1314919C (en) |
| DE (1) | DE3884078T2 (en) |
| ES (1) | ES2046317T3 (en) |
| FR (1) | FR2617633B1 (en) |
| IN (1) | IN171665B (en) |
| TR (1) | TR23310A (en) |
| YU (1) | YU47287B (en) |
Families Citing this family (85)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2644624B1 (en) * | 1989-03-17 | 1996-03-22 | Merlin Gerin | ELECTRICAL CIRCUIT BREAKER WITH SELF-EXPANSION AND INSULATING GAS |
| FR2693027B1 (en) * | 1992-06-30 | 1997-04-04 | Merlin Gerin | SELF-EXPANSION SWITCH OR CIRCUIT BREAKER. |
| FR2713014B1 (en) * | 1993-11-24 | 1996-01-12 | Merlin Gerin | Self-expanding insulating gas circuit breaker. |
| FR2752329B1 (en) * | 1996-08-09 | 1998-09-25 | Schneider Electric Sa | CIRCUIT BREAKER WITH ROTATING ARC AND EXPANSION |
| IT1292453B1 (en) | 1997-07-02 | 1999-02-08 | Aeg Niederspannungstech Gmbh | ROTATING GROUP OF CONTACTS FOR HIGH FLOW SWITCHES |
| DE19819242B4 (en) | 1998-04-29 | 2005-11-10 | Ge Power Controls Polska Sp.Z.O.O. | Thermomagnetic circuit breaker |
| US6114641A (en) * | 1998-05-29 | 2000-09-05 | General Electric Company | Rotary contact assembly for high ampere-rated circuit breakers |
| US6087913A (en) * | 1998-11-20 | 2000-07-11 | General Electric Company | Circuit breaker mechanism for a rotary contact system |
| US6037555A (en) * | 1999-01-05 | 2000-03-14 | General Electric Company | Rotary contact circuit breaker venting arrangement including current transformer |
| US6166344A (en) * | 1999-03-23 | 2000-12-26 | General Electric Company | Circuit breaker handle block |
| US6262872B1 (en) | 1999-06-03 | 2001-07-17 | General Electric Company | Electronic trip unit with user-adjustable sensitivity to current spikes |
| US6268991B1 (en) | 1999-06-25 | 2001-07-31 | General Electric Company | Method and arrangement for customizing electronic circuit interrupters |
| US6218917B1 (en) | 1999-07-02 | 2001-04-17 | General Electric Company | Method and arrangement for calibration of circuit breaker thermal trip unit |
| US6188036B1 (en) | 1999-08-03 | 2001-02-13 | General Electric Company | Bottom vented circuit breaker capable of top down assembly onto equipment |
| US6252365B1 (en) | 1999-08-17 | 2001-06-26 | General Electric Company | Breaker/starter with auto-configurable trip unit |
| US6710988B1 (en) | 1999-08-17 | 2004-03-23 | General Electric Company | Small-sized industrial rated electric motor starter switch unit |
| US6396369B1 (en) | 1999-08-27 | 2002-05-28 | General Electric Company | Rotary contact assembly for high ampere-rated circuit breakers |
| US6175288B1 (en) | 1999-08-27 | 2001-01-16 | General Electric Company | Supplemental trip unit for rotary circuit interrupters |
| US6232570B1 (en) | 1999-09-16 | 2001-05-15 | General Electric Company | Arcing contact arrangement |
| US6326869B1 (en) | 1999-09-23 | 2001-12-04 | General Electric Company | Clapper armature system for a circuit breaker |
| US6239395B1 (en) | 1999-10-14 | 2001-05-29 | General Electric Company | Auxiliary position switch assembly for a circuit breaker |
| US6229413B1 (en) | 1999-10-19 | 2001-05-08 | General Electric Company | Support of stationary conductors for a circuit breaker |
| US6317018B1 (en) | 1999-10-26 | 2001-11-13 | General Electric Company | Circuit breaker mechanism |
| US6232856B1 (en) | 1999-11-02 | 2001-05-15 | General Electric Company | Magnetic shunt assembly |
| EP1098343B1 (en) | 1999-11-03 | 2005-09-21 | AEG Niederspannungstechnik GmbH & Co. KG | Circuit breaker rotary contact arm arrangement |
| US6377144B1 (en) | 1999-11-03 | 2002-04-23 | General Electric Company | Molded case circuit breaker base and mid-cover assembly |
| US6300586B1 (en) | 1999-12-09 | 2001-10-09 | General Electric Company | Arc runner retaining feature |
| US6310307B1 (en) | 1999-12-17 | 2001-10-30 | General Electric Company | Circuit breaker rotary contact arm arrangement |
| US6184761B1 (en) | 1999-12-20 | 2001-02-06 | General Electric Company | Circuit breaker rotary contact arrangement |
| US6172584B1 (en) | 1999-12-20 | 2001-01-09 | General Electric Company | Circuit breaker accessory reset system |
| US6215379B1 (en) | 1999-12-23 | 2001-04-10 | General Electric Company | Shunt for indirectly heated bimetallic strip |
| US6281461B1 (en) | 1999-12-27 | 2001-08-28 | General Electric Company | Circuit breaker rotor assembly having arc prevention structure |
| US6346869B1 (en) | 1999-12-28 | 2002-02-12 | General Electric Company | Rating plug for circuit breakers |
| US6211758B1 (en) | 2000-01-11 | 2001-04-03 | General Electric Company | Circuit breaker accessory gap control mechanism |
| US6239677B1 (en) | 2000-02-10 | 2001-05-29 | General Electric Company | Circuit breaker thermal magnetic trip unit |
| US6429759B1 (en) | 2000-02-14 | 2002-08-06 | General Electric Company | Split and angled contacts |
| US6313425B1 (en) | 2000-02-24 | 2001-11-06 | General Electric Company | Cassette assembly with rejection features |
| US6281458B1 (en) | 2000-02-24 | 2001-08-28 | General Electric Company | Circuit breaker auxiliary magnetic trip unit with pressure sensitive release |
| US6204743B1 (en) | 2000-02-29 | 2001-03-20 | General Electric Company | Dual connector strap for a rotary contact circuit breaker |
| US6404314B1 (en) | 2000-02-29 | 2002-06-11 | General Electric Company | Adjustable trip solenoid |
| US6340925B1 (en) | 2000-03-01 | 2002-01-22 | General Electric Company | Circuit breaker mechanism tripping cam |
| US6379196B1 (en) | 2000-03-01 | 2002-04-30 | General Electric Company | Terminal connector for a circuit breaker |
| US6448521B1 (en) | 2000-03-01 | 2002-09-10 | General Electric Company | Blocking apparatus for circuit breaker contact structure |
| US6346868B1 (en) | 2000-03-01 | 2002-02-12 | General Electric Company | Circuit interrupter operating mechanism |
| US6211757B1 (en) | 2000-03-06 | 2001-04-03 | General Electric Company | Fast acting high force trip actuator |
| US6459349B1 (en) | 2000-03-06 | 2002-10-01 | General Electric Company | Circuit breaker comprising a current transformer with a partial air gap |
| US6366438B1 (en) | 2000-03-06 | 2002-04-02 | General Electric Company | Circuit interrupter rotary contact arm |
| US6496347B1 (en) | 2000-03-08 | 2002-12-17 | General Electric Company | System and method for optimization of a circuit breaker mechanism |
| US6429659B1 (en) | 2000-03-09 | 2002-08-06 | General Electric Company | Connection tester for an electronic trip unit |
| US6232859B1 (en) | 2000-03-15 | 2001-05-15 | General Electric Company | Auxiliary switch mounting configuration for use in a molded case circuit breaker |
| US6218919B1 (en) | 2000-03-15 | 2001-04-17 | General Electric Company | Circuit breaker latch mechanism with decreased trip time |
| US6366188B1 (en) | 2000-03-15 | 2002-04-02 | General Electric Company | Accessory and recess identification system for circuit breakers |
| US6459059B1 (en) | 2000-03-16 | 2002-10-01 | General Electric Company | Return spring for a circuit interrupter operating mechanism |
| US6421217B1 (en) | 2000-03-16 | 2002-07-16 | General Electric Company | Circuit breaker accessory reset system |
| US6472620B2 (en) | 2000-03-17 | 2002-10-29 | Ge Power Controls France Sas | Locking arrangement for circuit breaker draw-out mechanism |
| US6373010B1 (en) | 2000-03-17 | 2002-04-16 | General Electric Company | Adjustable energy storage mechanism for a circuit breaker motor operator |
| US6639168B1 (en) | 2000-03-17 | 2003-10-28 | General Electric Company | Energy absorbing contact arm stop |
| FR2806548B1 (en) | 2000-03-17 | 2002-08-23 | Ge Power Controls France | EXTRACTABLE MECHANISM FOR CIRCUIT BREAKERS |
| US6476698B1 (en) | 2000-03-17 | 2002-11-05 | General Electric Company | Convertible locking arrangement on breakers |
| US6586693B2 (en) | 2000-03-17 | 2003-07-01 | General Electric Company | Self compensating latch arrangement |
| US6479774B1 (en) | 2000-03-17 | 2002-11-12 | General Electric Company | High energy closing mechanism for circuit breakers |
| US6388213B1 (en) | 2000-03-17 | 2002-05-14 | General Electric Company | Locking device for molded case circuit breakers |
| US6559743B2 (en) | 2000-03-17 | 2003-05-06 | General Electric Company | Stored energy system for breaker operating mechanism |
| US6747535B2 (en) | 2000-03-27 | 2004-06-08 | General Electric Company | Precision location system between actuator accessory and mechanism |
| US6373357B1 (en) | 2000-05-16 | 2002-04-16 | General Electric Company | Pressure sensitive trip mechanism for a rotary breaker |
| US6995640B2 (en) * | 2000-05-16 | 2006-02-07 | General Electric Company | Pressure sensitive trip mechanism for circuit breakers |
| US6400245B1 (en) | 2000-10-13 | 2002-06-04 | General Electric Company | Draw out interlock for circuit breakers |
| US6531941B1 (en) | 2000-10-19 | 2003-03-11 | General Electric Company | Clip for a conductor in a rotary breaker |
| US6429760B1 (en) | 2000-10-19 | 2002-08-06 | General Electric Company | Cross bar for a conductor in a rotary breaker |
| US6806800B1 (en) | 2000-10-19 | 2004-10-19 | General Electric Company | Assembly for mounting a motor operator on a circuit breaker |
| US6362711B1 (en) | 2000-11-10 | 2002-03-26 | General Electric Company | Circuit breaker cover with screw locating feature |
| US6380829B1 (en) | 2000-11-21 | 2002-04-30 | General Electric Company | Motor operator interlock and method for circuit breakers |
| US6448522B1 (en) | 2001-01-30 | 2002-09-10 | General Electric Company | Compact high speed motor operator for a circuit breaker |
| US6476337B2 (en) | 2001-02-26 | 2002-11-05 | General Electric Company | Auxiliary switch actuation arrangement |
| US6882258B2 (en) | 2001-02-27 | 2005-04-19 | General Electric Company | Mechanical bell alarm assembly for a circuit breaker |
| US6678135B2 (en) | 2001-09-12 | 2004-01-13 | General Electric Company | Module plug for an electronic trip unit |
| US6469882B1 (en) | 2001-10-31 | 2002-10-22 | General Electric Company | Current transformer initial condition correction |
| US6804101B2 (en) | 2001-11-06 | 2004-10-12 | General Electric Company | Digital rating plug for electronic trip unit in circuit breakers |
| WO2009140999A1 (en) * | 2008-05-20 | 2009-11-26 | Abb Research Ltd | Circuit breaker |
| CN101599386B (en) * | 2009-07-02 | 2012-07-25 | 北京合锐赛尔电力科技有限公司 | Load switch used in visual fracture state of 24kV power distribution system |
| US8274007B2 (en) * | 2009-08-19 | 2012-09-25 | Southern States, Inc. | Magnet interrupter for high voltage switching |
| EP2461339B1 (en) * | 2010-12-03 | 2015-10-28 | ABB Technology AG | Circuit breaker pole |
| FR3029351B1 (en) * | 2014-12-02 | 2017-12-29 | Alstom Technology Ltd | ELECTRICAL CUTTING DEVICE INTEGRATING CIRCUIT BREAKER AND DISCONNECT |
| CN106783373B (en) * | 2017-01-16 | 2019-02-01 | 同济大学 | A kind of vacuum interrupter with dynamic main contac and moving arcing contact |
| CN113161193B (en) * | 2020-11-27 | 2022-08-30 | 平高集团有限公司 | Vacuum circuit breaker and vacuum arc extinguish chamber |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6137162Y2 (en) * | 1978-05-31 | 1986-10-28 | ||
| FR2422246A1 (en) * | 1978-04-07 | 1979-11-02 | Merlin Gerin | Discharge suppressor for gas filled circuit breakers - is both magnetically and pneumatically operated with vents and baffles angled inward being displaced from contacts as circuit is broken |
| JPS55157824A (en) * | 1979-05-25 | 1980-12-08 | Mitsubishi Electric Corp | Switch |
| FR2459543A1 (en) * | 1979-06-15 | 1981-01-09 | Alsthom Cgee | HIGH VOLTAGE CIRCUIT BREAKER WITH ROTATING ARC AND SELF-BLOWING |
| JPS5749139A (en) * | 1980-09-09 | 1982-03-20 | Mitsubishi Electric Corp | Gas breaker |
| JPS5796418A (en) * | 1980-12-05 | 1982-06-15 | Mitsubishi Electric Corp | Gas breaker |
| YU173582A (en) * | 1981-09-16 | 1985-03-20 | Bbc Brown Boveri & Cie | Electrical switch |
| DE3141324C2 (en) * | 1981-10-17 | 1986-02-06 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | Circuit breaker |
| FR2515418A1 (en) * | 1981-10-26 | 1983-04-29 | Merlin Gerin | SELF-EXPANSION AND PERMANENT MAGNET SWITCH |
| JPS59130345U (en) * | 1983-02-21 | 1984-09-01 | 日新電機株式会社 | Gas cutter |
| CH661144A5 (en) * | 1983-10-28 | 1987-06-30 | Bbc Brown Boveri & Cie | HIGH VOLTAGE CIRCUIT BREAKERS. |
| IT8420599V0 (en) * | 1984-01-20 | 1984-01-20 | Sace Spa | ARC EXTINGUISHING FLUID ELECTRIC SWITCH WITH SELF-GENERATION OF PRESSURE FOR FLUID DECOMPOSITION. |
| DE3435967A1 (en) * | 1984-08-22 | 1986-03-06 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | EXHAUST GAS SWITCH |
| FR2596578B1 (en) * | 1986-03-28 | 1994-05-06 | Merlin Et Gerin | ELECTRIC CIRCUIT BREAKER WITH SELF-EXPANSION AND ROTATING ARC |
| EP0483122B1 (en) * | 1986-06-06 | 1994-08-31 | Mitsubishi Denki Kabushiki Kaisha | Switchgear |
-
1987
- 1987-07-02 FR FR8709524A patent/FR2617633B1/en not_active Expired
-
1988
- 1988-06-20 EP EP88401529A patent/EP0298809B1/en not_active Expired - Lifetime
- 1988-06-20 ES ES198888401529T patent/ES2046317T3/en not_active Expired - Lifetime
- 1988-06-20 DE DE88401529T patent/DE3884078T2/en not_active Expired - Fee Related
- 1988-06-22 US US07/209,927 patent/US4900882A/en not_active Expired - Fee Related
- 1988-06-24 IN IN435/MAS/88A patent/IN171665B/en unknown
- 1988-06-27 CA CA000570470A patent/CA1314919C/en not_active Expired - Fee Related
- 1988-06-29 TR TR492/88A patent/TR23310A/en unknown
- 1988-06-30 YU YU126688A patent/YU47287B/en unknown
- 1988-07-01 JP JP63164783A patent/JP2746379B2/en not_active Expired - Lifetime
- 1988-07-01 BR BR8803290A patent/BR8803290A/en not_active IP Right Cessation
- 1988-07-01 CN CN88104016A patent/CN1018965B/en not_active Expired
- 1988-07-02 KR KR1019880008232A patent/KR0129003B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE3884078D1 (en) | 1993-10-21 |
| CN1030496A (en) | 1989-01-18 |
| BR8803290A (en) | 1989-01-31 |
| EP0298809B1 (en) | 1993-09-15 |
| US4900882A (en) | 1990-02-13 |
| KR890002930A (en) | 1989-04-12 |
| KR0129003B1 (en) | 1998-04-15 |
| EP0298809A1 (en) | 1989-01-11 |
| DE3884078T2 (en) | 1994-04-21 |
| CN1018965B (en) | 1992-11-04 |
| TR23310A (en) | 1989-10-20 |
| ES2046317T3 (en) | 1994-02-01 |
| FR2617633B1 (en) | 1989-11-17 |
| JPS6421839A (en) | 1989-01-25 |
| IN171665B (en) | 1992-12-05 |
| JP2746379B2 (en) | 1998-05-06 |
| YU126688A (en) | 1991-02-28 |
| FR2617633A1 (en) | 1989-01-06 |
| YU47287B (en) | 1995-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1314919C (en) | Rotating arc and expansion circuit breaker | |
| US5001313A (en) | Rotating arc circuit breaker with centrifugal extinguishing gas effect | |
| US5373130A (en) | Self-extinguishing expansion switch or circuit breaker | |
| US5168139A (en) | Load-break switch having a vacuum interrupter and method of operation | |
| EP0088442B1 (en) | Puffer type gas-blast circuit breaker | |
| CA1158289A (en) | Circuit interrupter | |
| CA1211487A (en) | High-voltage y-shaped dead tank circuit interrupter | |
| US3508021A (en) | Vacuum switch | |
| US3586804A (en) | Disconnect switch | |
| KR950011296B1 (en) | Electrical puffer-type circuit breaker having a dielectrical strength | |
| US4086459A (en) | Rod array vacuum switch for high voltage operation | |
| US4442330A (en) | Puffer type current interrupter | |
| US3480750A (en) | Multiple-break enclosed-type circuit interrupters with external rotary contact driving means and single chamber construction | |
| JPS60189130A (en) | Composite type breaking device | |
| JPS6031142Y2 (en) | Gas sprayer and disconnector | |
| JPH0548347Y2 (en) | ||
| JPH0754904Y2 (en) | Gas circuit breaker for shunt reactor | |
| JPH0142267Y2 (en) | ||
| SU1697132A1 (en) | High-voltage commutation apparatus | |
| CA1111089A (en) | High voltage plain break circuit interrupter | |
| JPH0311790Y2 (en) | ||
| JP2523478B2 (en) | Puffer type gas breaker | |
| JPH0743987B2 (en) | Puffer type gas circuit breaker | |
| JPS6333461Y2 (en) | ||
| JPH03101025A (en) | Buffer type gas-blast circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |