Patent application number | Description | Published |
20080203061 | Gas-circuit breaker - A gas-circuit breaker includes a cylinder, a stationary piston, and a moving piston. The cylinder has a moving contact that is fixed on one end of a rod and has a gas exhaust that faces a stationary contact. The rod is inserted into the cylinder. The stationary piston is fixed to the container, and is fitted in an opening of the cylinder to create a puffer chamber. Due to movement of the rod, the stationary piston compresses arc-extinguishing gas, and the gas blows onto the arc through gas exhaust. The moving piston partitions the puffer chamber into a first puffer chamber and a second puffer chamber. Sliding of the moving piston changes the capacity of the first puffer chamber and the second puffer chamber according to the difference in pressure in the first puffer chamber and the second puffer chamber. | 08-28-2008 |
20080257865 | Gas circuit breaker - A gas circuit breaker includes a grounded tank corresponding to each one of the plurality of phases, a bushing, an upper housing, and a lower housing, those mounted on a base that is supported by a frame. The grounded tank and the upper housing are located on a plane. The lower housing is connected to the grounded tank with a connecting unit such that the lower housing can be moved from a first position for operation lower than the plane to a second position for transportation substantially on the plane. | 10-23-2008 |
20120162858 | LAMINATED TYPE CERAMIC ELECTRONIC PARTS - A multilayer ceramic electronic component comprising an element body in which a dielectric layer and an internal electrode layer are stacked. The dielectric layer is constituted from a dielectric ceramic composition including; a compound having a perovskite structure expressed by a formula of ABO | 06-28-2012 |
20130161288 | GAS CIRCUIT BREAKER - A gas circuit breaker includes: a sealed tank filled with insulation gas; a pair of arc contacts that are arranged to face each other in the sealed tank and connectable and disconnectable with each other; a thermal puffer chamber that is provided on an outer circumferential portion of the pair of arc contacts; a mechanical puffer chamber that is provided on an outer circumference of the thermal puffer chamber and constituted by a cylinder formed in a toric shape centering around an axial line of the arc contacts; and a piston that is formed in a toric shape centering around the axial line and accommodated in the cylinder, and configured to move according to connection and disconnection of the arc contacts. | 06-27-2013 |
20130284703 | GAS CIRCUIT BREAKER - A mechanical-puffer-type arc-extinguishing chamber includes a fixed main contact, a movable main contact that moves on an opening-and-closing axis in a connectable and disconnectable manner to and from the fixed main contact, and a mechanical puffer chamber that is provided in the movable main contact and blows compressed insulation gas to an arc. A thermal-puffer-type arc-extinguishing chamber includes a fixed contact, a movable contact that moves on the opening-and-closing axis in a connectable and disconnectable manner to and from the fixed contact, and a thermal puffer chamber in which compressed insulation gas is blown to the arc. The mechanical-puffer-type arc-extinguishing chamber and the thermal-puffer-type arc-extinguishing chamber are arranged in series on the opening-and-closing axis, and two breaking portions are electrically connected in series. | 10-31-2013 |
20140198429 | MAIN CIRCUIT SWITCHGEAR - There is provided a main circuit switchgear that includes a breaker; a leg part that supports the breaker; a disconnector that is connected to the breaker; a leg part that supports the disconnector; a metal container that accommodates therein the breaker and the disconnector and includes a bottom plate in which an opening is provided at a position corresponding to a position of the leg part, where the leg part is fixed onto the bottom plate, and a support frame that includes a top panel on which the bottom plate is placed and a leg part that supports the top panel, where the leg part is fixed onto the top panel via the opening. | 07-17-2014 |
20140202991 | GAS CIRCUIT BREAKER - An outer peripheral wall surrounds a heating chamber that communicates with an arc chamber through an opening that separates fixed contacts from each other in a circumferential direction. The outer peripheral wall includes a heat-resistive cylindrical heat-flow receiving wall portion that is arranged at a position opposed to the opening in a radial direction, and a cylindrical wall portion that is connected to the heat-flow receiving wall portion in a direction of a center axis and also connected to a fixed-side energizing member at its one end on the opposite side to where the wall portion is connected to the heat-flow receiving wall portion, and is made of an insulating material. With this configuration, the outer peripheral wall surrounding the heating chamber can be protected from damage and heat deterioration due to the influence of hot gas. | 07-24-2014 |
20140360850 | POWER SWITCHGEAR - Each outermost part of fixed-side connection conductors, fixed-side fixed contacts, movable-side fixed contacts, and movable-side connection conductors are placed outside of an outermost diameter of a fixed-side conductor and a movable-side conductor, as viewed from an axis line of the fixed-side conductor and the movable-side conductor as a center. This arrangement provides a power switchgear that can diminish mutual effects of currents among conduction parts to suppress decrease in a current-carrying capacity for each of the conduction parts and to increase a current-carrying capacity for a total of the conduction parts, without increasing the size of the switchgear. | 12-11-2014 |
20140376814 | Image Signal Processing Apparatus, Imaging Apparatus and Image Processing Program - An image signal processing apparatus includes an image signal input unit, a local information acquisition unit for calculating a statistical quantity of pixel values in a local area including a noted pixel from an image signal as local information, a noise correction unit for conducting noise correction on the image signal by using the local information and outputting a noise-corrected image signal, an image signal correction unit for conducting signal level correction on the image signal from the noise correction unit and outputting a level-corrected image signal, an image signal correction intensity control unit for determining correction intensity in the level correction and changing input-output characteristics in the level correction, a signal correction characteristic estimation unit for estimating level correction characteristics based on the correction intensity, and a noise correction intensity control unit for controlling correction intensity in the noise correction in conjunction with the level correction characteristics. | 12-25-2014 |
20150053647 | GAS CIRCUIT BREAKER - A piston rod includes a large-diameter portion that is formed on the side of a movable contact, and a small-diameter portion that is formed on the side of an insulating operation rod relative to the large-diameter portion, and that is formed with an outer diameter smaller than the inner diameter of an inner peripheral surface of an insulating cylindrical member. The insulating cylindrical member includes a cylindrical portion that is interposed between the outer peripheral surface of the small-diameter portion and the inner peripheral surface of the insulating operation rod, a bottom portion that is arranged opposed to the distal end of the small-diameter portion, and a through hole through which a coupling pin is inserted through the piston rod and the insulating operation rod. | 02-26-2015 |
20150060411 | GAS CIRCUIT BREAKER - Provided are: a hermetically-enclosed tank that is filled with insulating gas; a blocking unit that is provided within the hermetically-enclosed tank and is configured with a movable arc contact and a fixed arc contact opposing each other; a plurality of energizing units, within the hermetically-enclosed tank, that are provided around the blocking unit about its axial line as a center and located away from each other; and a fixed-side auxiliary conductor that is provided between a gas space which stores the energizing units and a gas space on the side of the fixed arc contact. A communication hole is formed on the fixed-side auxiliary conductor so as to communicate the gas space provided between the energizing units with the gas space. | 03-05-2015 |