摘要:
A power-generation main circuit switchgear 1 includes a casing 1e with an axial direction thereof being an extending direction of an isolated-phase bus 2, internal conductors 1a and 1b arranged in the casing 1e and constituting a breaking unit 10, a duct 5 provided on the casing 1e and communicating with a space inside the casing 1e through a plurality of vent holes 5a and 5b, and a blower 4 arranged in the duct 5 to blow wind in the axial direction. The vent hole 5a is provided on the upstream side of the blower 4 and the vent holes 5b are provided on the downstream side of the blower 4. Wind blowing from the blower 4 circulates inside the duct 5 and inside the casing 1e through the vent holes 5a and 5b, and wind blowing from the inside of the duct 5 to the inside of the casing 1e through the vent holes 5b directly hits the internal conductors 1a and 1b
摘要:
A power-generation main circuit switchgear 1 includes a casing 1e with an axial direction thereof being an extending direction of an isolated-phase bus 2, internal conductors 1a and 1b arranged in the casing 1e and constituting a breaking unit 10, a duct 5 provided on the casing 1e and communicating with a space inside the casing 1e through a plurality of vent holes 5a and 5b, and a blower 4 arranged in the duct 5 to blow wind in the axial direction. The vent hole 5a is provided on the upstream side of the blower 4 and the vent holes 5b are provided on the downstream side of the blower 4. Wind blowing from the blower 4 circulates inside the duct 5 and inside the casing 1e through the vent holes 5a and 5b, and wind blowing from the inside of the duct 5 to the inside of the casing 1e through the vent holes 5b directly hits the internal conductors 1a and 1b
摘要:
A gas circuit breaker (1) includes a rod-shaped fixed arc contact (3), a cylindrical movable arc contact (5) to contact or be separated from the fixed arc contact (3), a heat puffer chamber (20) storing an arc-extinguishing gas to be blown to an arc (30) generated between the fixed arc contact (3) and the movable arc contact (5), and an insulator (15) received within a receiving hole (14) formed in a distal end part of the fixed arc contact (3). An end surface of the insulator (15) on a side of the movable arc contact (5) faces the side of the movable arc contact (5) via an opening end (33) of the housing hole (14), the end surface on the side of the movable arc contact (5) is disposed closer to the inside of the housing hole (14) than the opening end (33) is, and the insulator is made of an ablation material that is vaporized by heat of the arc (30).
摘要:
A gas circuit breaker (50) includes: a first tank (10) filled with an insulating gas; a fixed contact (1) provided inside the first tank (10); a movable contact (2) provided inside the first tank (10) and movable between a position in contact with the fixed contact (1) and a position separated from the fixed contact (1); a nozzle (5) that ejects the insulating gas toward the fixed contact (1) when the movable contact (2) moves in a first direction, the first direction being a direction in which the movable contact (2) moves from the position in contact with the fixed contact (1) to the position separated from the movable contact (2); a cylindrical body (6) that guides the gas ejected from the nozzle (5) in a second direction, the second direction being a direction opposite to the first direction; and a second tank (20) connected to the first tank (10) in the second direction.
摘要:
The circuit breaker box 1 includes a housing unit that can house therein a switching device 11 that switches contacts and a conductor 20 that is connected to the switching device 11. The housing unit has a tubular shape extending in a first direction and that includes: a horizontal top surface 2; inclined surfaces 3 extending downward from both sides of the top surface 2 so as to be away from each other; a bottom surface 4 that opposes the top surface 2; and side surfaces 5 perpendicularly extending from both sides of the bottom surface 4 towards the inclined surfaces 3. The circuit breaker box 1 further includes fins 12, 13 that are provided upright on the top surface 2 and on the inclined surfaces 3.
摘要:
A gas-insulated switchgear includes: a plurality of circuit breakers extending along a first direction and aligned in rows along a second direction perpendicular to the first direction; one end rising portions (101-109) raised from one end of the plurality of circuit breakers along a third direction perpendicular to the first direction and the second direction; other end rising portions (111-119) raised from another end of the plurality of circuit breakers along the third direction; and a plurality of connection busbars (3) connecting the other end rising portions (111-119) together or connecting the one end rising portions (101-109) together. At least one of the plurality of connection busbars (3) passes through two lines (L2, L3) set between the one end rising portions (101-109) and the other end rising portions (111-119).
摘要:
A gas circuit breaker includes: a fixed arc contact (3) extending along an operating axis (30); a moving arc contact (4) allowed to move to a position where the moving arc contact (4) contacts the fixed arc contact (3) and a position where the moving arc contact (4) is separated from the fixed arc contact (3); a frame (6) forming a puffer chamber (7) around the moving arc contact (4); a nozzle (8) having a cylindrical shape centered on the operating axis (30), the nozzle (8) being fixed to the frame (6) and projecting in a direction toward the fixed arc contact (3) from the moving arc contact (4); and an arc extinction assisting portion (11) provided on an inner surface of the nozzle (8) and made of an ablation material. The nozzle (8) and the arc extinction assisting portion (11) are provided with a fall-off preventing portion to prevent the arc extinction assisting portion (11) from falling off the nozzle (8).
摘要:
The circuit breaker box 1 includes a housing unit that can house therein a switching device 11 that switches contacts and a conductor 20 that is connected to the switching device 11. The housing unit has a tubular shape extending in a first direction and that includes: a horizontal top surface 2; inclined surfaces 3 extending downward from both sides of the top surface 2 so as to be away from each other; a bottom surface 4 that opposes the top surface 2; and side surfaces 5 perpendicularly extending from both sides of the bottom surface 4 towards the inclined surfaces 3. The circuit breaker box 1 further includes fins 12, 13 that are provided upright on the top surface 2 and on the inclined surfaces 3.