摘要:
A medium or high tension arc-puffing circuit breaker comprising a gastight casing filled with a dielectric gas and containing a semi-fixed first contact electrically connected to a first current terminal and a moving second contact which is electrically connected to a second current terminal and which is mechanically connected to a drive member, said semi-fixed contact being fixed to a piston that moves in a cylinder, said piston delimiting a first volume in the arc zone end of said cylinder and a second volume in the other end thereof, said semi-fixed contact being subject to the action of a spring urging the semi-fixed contact in the same direction as the moving contact during a disengagement operation, wherein the circuit breaker includes means for limiting the speed and the amplitude of the motion of the piston in the spring-compressing direction during a disengagement operation on a short circuit current, said means also enabling unpolluted gas to be injected into the arcing contact zone during the reengagement operation that follows said disengagement operation.
摘要:
A high tension circuit breaker having a dielectric gas under pressure, the circuit breaker being of the type including at least one interrupting chamber comprising an insulating shell filled with the gas and containing a fixed assembly including a fixed main contact and a fixed arcing contact, a moving assembly including a moving main contact and a moving arcing contact, a blast cylinder opening out into a blast nozzle, and a pair of secondary contacts, the circuit breaker being characterized in that the blast cylinder is delimited by a first cylinder (5) constituting the moving arcing contact, a second cylinder (7) constituting the main moving contact, and a semi-moving first piston (14) carrying one of the secondary contacts, with the other secondary contact (31) being carried by a fixed tube (15) which, together with the first piston, an insulating tubular extension (5B) of the first cylinder (5), and a second piston fixed to the cylinder (5) and sliding along the fixed tube, delimits a second closed volume (35).
摘要:
A circuit breaker for high and medium tension including insulation by means of a dielectric gas and puffer arc blasting, the circuit breaker comprising a gastight insulating casing, containing:a fixed assembly comprising, in particular, a fixed main contact and a fixed arcing contact;a moving assembly driven by a drive rod and including, in particular, a moving main contact and a moving arcing contact;a first blast volume extended by a blast nozzle;a blast piston; andfirst and second secondary contacts disposed inside a second volume and designed to strike a secondary arc;wherein the first secondary contact is fixed relative to the fixed assembly, the second secondary contact being semi-moving relative to the moving assembly, possessing its own source of energy for displacing it during a circuit breaker disengagement operation, and being provided with means for conferring a shorter stroke thereto than the stroke of the moving assembly.
摘要:
A high tension circuit breaker insulated by an arc blasting dielectric gas and comprising, inside a gastight insulating housing: a fixed assembly comprising, in particular, a fixed main contact and a fixed arcing contact; a moving assembly driven by a drive rod and including, in particular, a moving main contact and a moving arcing contact; a blast volume extended by a blast nozzle; a blast piston; and a pair of secondary contacts disposed inside a first volume and intended to generate a secondary arc; wherein the circuit breaker further comprises first means for reducing the risks of unwanted arcs being struck due to the secondary arc, the first means being constituted by a jacket of insulating material extending level with the secondary contacts and in sliding contact with at least a portion of one of the sliding contacts, the jacket having longitudinal grooves adjacent to said secondary contact. The invention is applicable to high tension circuit breakers.
摘要:
A compressed dielectric gas high-tension circuit breaker comprising: a fixed assembly comprising main contacts and arcing contacts; a moving assembly comprising main contacts and arcing contacts; a blast chamber comprising a piston which moves on separation of the contacts to urge compressed blast gas towards a blast nozzle situated in the zone where an arc is struck; and a thermal volume; wherein the thermal volume is in communication with the downstream portion of the blast nozzle via channels and passages extending the path between the thermal volume and said nozzle, said communication being closed by a calibrated non-return valve which opens only when the pressure in said channels and in said passage reaches a threshold value, said non-return valve closing the passage between the blast chamber and the nozzle when said communication is opened.
摘要:
A high- or medium-tension compressed gas circuit breaker taking circuit-breaking energy from the arc, the circuit breaker being of the type comprising:a fixed assembly including main contacts (8a) and arc contacts (21a);a moving assembly including main contacts (26) and arc contacts (25);a blast volume (VI) including a piston (12) which moves on contact separation and urges compressed gas through a blast nozzle (7) which opens over the zone where a main arc forms when the arc contacts separate, anda set of auxiliary contacts (22a, 21c) in series with the arc contacts for creating an auxiliary arc in the volume (V2) situated behind the piston,the circuit breaker further including means (23, 24) for allowing the auxiliary contacts to separate only when the pressure in the blast zone reaches a predetermined threshold.
摘要:
A compressed gas dielectric circuit breaker comprising fixed main contacts (11), fixed arcing contacts (8A), a moving assembly comprising main contacts (21) and arcing contacts (22A), a blast device comprising a semi-moving cylinder (16) divided into first and second chambers (15, 35) by a fixed piston (3B), with the first chamber (15) communicating with a blast nozzle (12), and a thermal volume (9) opening out into the zone where the fixed arcing contacts (8A) separate from the arcing contacts (22A) of the moving assembly, communication (26) being established between the thermal volume (9) and said second chamber (35) in order to enable gas heated by the arc in the thermal volume to increase in pressure and to assist in the displacement of the cylinder (16) and thus in the compression of the gas in the first chamber (15).
摘要:
A medium tension circuit breaker having a dielectric blast gas, the circuit breaker comprising a cylindrical insulating casing filled with dielectric gas under pressure, a fixed main contact, a fixed arcing contact, a fixed blast piston, and moving equipment connected to an operating member and comprising a moving main contact, a moving arcing contact, and a blast cylinder associated with a blast nozzle, wherein the circuit breaker includes a drive piston whose section is not less than 1.3 times the section of the blast piston, the drive piston moving relative to a second cylinder.
摘要:
A high tension circuit breaker containing a dielectric gas under pressure, the circuit breaker being of the type comprising at least one interrupting chamber comprising an insulating envelope filled with said gas and containing a fixed assembly including a fixed main contact (2) and a fixed arcing contact (4), and a moving assembly including a moving main contact (7) and a moving arcing contact (5), the interrupting chamber also containing a pair of secondary contacts and a blast cylinder opening out into a blast nozzle. The circuit breaker further includes first means (37, 38,104) for limiting the maximum separation distance between the secondary contacts to a value which is less than the maximum separation distance between the arcing contacts, and second means (60, 101) for preventing any arcs being struck during closure.
摘要:
The present invention provides a circuit breaker in which the blast cylinder is delimited by a first cylinder (5) constituting the moving arcing contact, a second cylinder (7) constituting the fixed main contact, and a first piston (14) sliding between said first and second cylinders, said first piston being urged by a spring (17) to come into abutment against a part (16A) fixed to the fixed assembly, the cylinder (5) constituting the moving arcing contact and a tube (16) connected to the fixed assembly and coaxial with said cylinder together delimiting, on the other side of the piston (14) closing the blast cylinder, a variable volume (35, 35B) closed at one end by said first piston (14) and at its other end by an annular end piston (42) connected to said first cylinder (5) and sliding along said tube (16), said volume enclosing said secondary contacts, a first secondary contact (30) being fixed to said tube (16) and the second secondary contact (31) being entrained by said first cylinder (5).