公开(公告)号：US20160035501A1

公开(公告)日：2016-02-04

申请号：US14813723

申请日：2015-07-30

Applicant: Hitachi, Ltd.

Inventor： Jun NUKAGA ,  Yoshio HAMADATE ,  Tomohiro MORIYAMA ,  Yoshiaki SEYA

IPC: H01H1/36 ,  H01H1/66

CPC classification number: H01H1/385 ,  H01H1/60 ,  H01H3/62 ,  H01H2001/406

Abstract: Disclosed is a power switch gear that includes: a fixed electrode and a movable electrode disposed opposite to each other in a tank filled with insulting gas; and a movable conductor electrically connecting the fixed electrode and the movable electrode together. The fixed electrode and the movable electrode have a contactor through which current flows to the movable conductor. At least one of the fixed electrode and the movable electrode has ring-shaped sliding members, the ring-shaped sliding members being disposed, on both sides of the contactor. At least one grease pool is provided between the contactor and the sliding members.

Abstract translation: 公开了一种功率开关装置，其包括：在填充有绝缘气体的罐中彼此相对设置的固定电极和可动电极; 以及将固定电极和可动电极电连接在一起的可动导体。 固定电极和可动电极具有电流流过可动导体的接触器。 固定电极和可动电极中的至少一个具有环形滑动构件，环形滑动构件设置在接触器的两侧。 在接触器和滑动构件之间至少设置一个油池。

公开(公告)号：US20200279704A1

公开(公告)日：2020-09-03

申请号：US16647647

申请日：2018-08-03

Applicant: Hitachi, Ltd.

Inventor： Hideyuki KOTSUJI ,  Jun NUKAGA ,  Makoto HIROSE ,  Takahiro NISHIMURA

IPC: H01H33/70

Abstract: An object is to enhance direct-current insulating performance of a gas-blast circuit breaker. The gas-blast circuit breaker includes: a pair of main contacts disposed in a gas tank to face each other and configured to operate for opening and closing a circuit; a pair of arc contacts disposed to face each other and configured to operate for opening and closing the circuit, the arc contacts being disposed coaxially with the main contacts at locations close to the centers of the main contacts, respectively; and an elastic electrically conductive material disposed on an outer surface of an insulating nozzle facing an inner surface of one of the main contacts.

公开(公告)号：US20170301454A1

公开(公告)日：2017-10-19

申请号：US15485855

申请日：2017-04-12

Applicant: HITACHI, LTD.

Inventor： Li LU ,  Kenichi KAWAMURA ,  Hiroshi MIYAO ,  Hiroshi MORITA ,  Satoshi ICHIMURA ,  Jun NUKAGA ,  Shinji FUJITA ,  Kohei YAMAGUCHI ,  Hideki OGATA ,  Masato SUZUKI

IPC: H01F27/28

CPC classification number: H01F27/289 ,  H01F27/2823 ,  H01F27/2871 ,  H01F27/2876 ,  H01F27/323

Abstract: A stationary induction electrical apparatus includes a disc winding having a structure in which a flow path for a cooling medium is provided between coils where a low voltage is generated between shield wires, an L-shaped insulation barrier is provided between coils where a high voltage is generated between the shield wires, a horizontal portion of the L-shaped insulation barrier is provided so as to closely contact an upper surface or a lower surface of the disc coil, a tip end portion in an axial direction of the L-shaped insulation barrier is provided so as to closely contact an inner surface of the disc coil which is adjacent to a pressboard insulation cylinder, and a height of the tip end portion in the axial direction is lower than a thickness of one coil.

公开(公告)号：US20200083678A1

公开(公告)日：2020-03-12

申请号：US16608410

申请日：2018-05-14

Applicant: Hitachi, Ltd.

Inventor： Hirokazu FURUI ,  Jun NUKAGA ,  Makoto HIROSE

IPC: H02B13/045 ,  H02B13/055

Abstract: An insulating spacer and a gas insulation shutoff apparatus each having a high dielectric strength against adhesion of a metal foreign substance are provided without increasing size or complicating a shape of the insulating spacer. In an insulating spacer of a gas insulation shutoff apparatus including a grounded tank filled with an insulating gas, a high-voltage conductor provided within the grounded tank, and the insulating spacer supporting and fixing the high-voltage conductor within the grounded tank, the insulating spacer includes a conductor to be connected to the high-voltage conductor, an insulating structure supporting and fixing the conductor within the grounded tank, and a nonlinear resistance layer provided on a creepage surface of the insulating structure, and the nonlinear resistance layer is provided in a portion to be a high-field portion of the creepage surface of the insulating structure.

公开(公告)号：US20180137652A1

公开(公告)日：2018-05-17

申请号：US15869508

申请日：2018-01-12

Applicant: Hitachi, Ltd.

Inventor： Li LU ,  Satoshi ICHIMURA ,  Tomohiro MORIYAMA ,  Jun NUKAGA ,  Toshiaki ROKUNOHE ,  Akira YAMAGISHI ,  Yasutomo SAITO

IPC: G06T7/00 ,  G01V8/00 ,  H04N9/04

Abstract: An oil leakage detector of the present invention includes an image processing unit wherein the image processing unit calculates the values of saturation and intensity of each pixel in the color image of the object after an ultra-violet light is irradiated thereon, draws an intensity-saturation characteristic line of the saturation expressed in an X-axis and the intensity expressed in a Y-axis, sets an upper limit and a lower limit of intensity of each saturation as a threshold value based on an area without oil adhesion on the surface of the object, and determines, in the intensity-saturation characteristic line, an area corresponding to a pixel group where the intensity exceeds the threshold value of the upper limit and a pixel group where the intensity falls below the threshold value of the lower limit, to be an oil leakage adhered area.

公开(公告)号：US20170016796A1

公开(公告)日：2017-01-19

申请号：US15205504

申请日：2016-07-08

Applicant: Hitachi, Ltd.

Inventor： Li LU ,  Satoshi ICHIMURA ,  Tomohiro MORIYAMA ,  Jun NUKAGA ,  Akira YAMAGISHI ,  Yasutomo SAITO

IPC: G01M3/20 ,  G06T7/00

CPC classification number: G01M3/20 ,  G01M3/38 ,  G06T7/0004 ,  H04N5/2256 ,  H04N5/2351 ,  H04N5/2353 ,  H04N9/045

Abstract: There is provided a leakage oil detection system including: a measurement device that includes a light source that causes a measured object which includes a leakage oil attachment part to be irradiated with ultraviolet rays, and an imaging device that detects fluorescence emitted from the leakage oil attachment part which is irradiated with the ultraviolet rays, and performs imaging on the measured object; and an analysis device that includes a driving control unit that controls operations of the light source and the imaging device, a recording unit that records an imaged image of the measured object which is imaged by the imaging device, and an image processing unit that calls the imaged image which is recorded in the recording unit and performs an image process. The imaging device controls exposure according to an exposure control value provided in the imaging device, and the analysis device calls the imaged image which is recorded in the recording unit for the image processing unit, calculates brightness values of respective pixels in the imaged image, determines a maximum brightness value which has the largest value among the brightness values of the respective pixels, compares the maximum brightness value with a reference brightness value which is determined in advance, acquires the exposure control value of the imaging device, in which the nearest brightness value that is smaller than the reference brightness value is acquired, images the measured object again by the imaging device using the acquired exposure control value, transmits the acquired image to the image processing unit, and detects leakage oil by performing the image process by the image processing unit.

Abstract translation: 提供一种漏油检测系统，包括：测量装置，其包括使包含要用紫外线照射的泄漏油附着部的测量对象的光源，以及检测从漏油附件发出的荧光的成像装置 用紫外线照射的部分，对测量对象进行成像; 以及分析装置，其包括控制光源和成像装置的操作的驱动控制单元，记录由成像装置成像的被测量物体的成像图像的记录单元和调用该成像装置的图像处理单元 记录在记录单元中并进行图像处理的成像图像。 成像装置根据成像装置中提供的曝光控制值控制曝光，并且分析装置调用记录在图像处理单元的记录单元中的成像图像，计算成像图像中的各个像素的亮度值，确定 在各像素的亮度值中具有最大值的最大亮度值将最大亮度值与预先确定的参考亮度值进行比较，获取摄像装置的曝光控制值，其中最接近亮度值 小于参考亮度值，利用获取的曝光控制值，通过成像装置再次对被测量物体进行成像，将所获取的图像发送到图像处理单元，并通过图像处理执行图像处理来检测泄漏油 单元。

公开(公告)号：US20170234762A1

公开(公告)日：2017-08-17

申请号：US15519301

申请日：2015-03-27

Applicant: HITACHI, LTD.

Inventor： Li LU ,  Toshiaki ROKUNOHE ,  Tomohiro MORIYAMA ,  Jun NUKAGA ,  Akira YAMAGISHI ,  Yasutomo SAITO

IPC: G01M3/38 ,  G01N33/28 ,  H01F27/12 ,  G01N21/64

CPC classification number: G01M3/38 ,  G01N21/6456 ,  G01N33/28 ,  G01N2021/6465 ,  H01F27/12

Abstract: A system and method for detecting leakage oil with a high degree of accuracy while avoiding the complexity of the system and the influence of noise light comprise: ultraviolet light sources arranged to irradiate an oil-filled device from a plurality of different incidence angles, and are switched on and off at the respective incidence angles in sequence, and include a wavelength exciting oil; an imaging device to photograph the oil-filled device irradiated with ultraviolet light emitted from the ultraviolet light sources when the ultraviolet light sources are switched on; a recorder to record respective images photographed by the imaging device; and a display to display the respective images. The respective images are compared, a site where a light emitting position does not change always is judged as a leakage oil site, and a site emitting light or not emitting light occasionally is judged as a noise light site.

公开(公告)号：US20160275699A1

公开(公告)日：2016-09-22

申请号：US15053294

申请日：2016-02-25

Applicant: Hitachi, Ltd.

Inventor： Li LU ,  Satoshi ICHIMURA ,  Tomohiro MORIYAMA ,  Jun NUKAGA ,  Toshiaki ROKUNOHE ,  Akira YAMAGISHI ,  Yasutomo SAITO

IPC: G06T7/40 ,  H04N9/04 ,  G06T7/00

CPC classification number: G06T7/90 ,  G01V8/00 ,  G06T7/0004 ,  G06T7/136 ,  G06T2207/10024 ,  H04N9/045

Abstract: An oil leakage detector of the present invention includes an image processing unit wherein the image processing unit calculates the values of saturation and intensity of each pixel in the color image of the object after an ultra-violet light is irradiated thereon, draws an intensity-saturation characteristic line of the saturation expressed in an X-axis and the intensity expressed in a Y-axis, sets an upper limit and a lower limit of intensity of each saturation as a threshold value based on an area without oil adhesion on the surface of the object, and determines, in the intensity-saturation characteristic line, an area corresponding to a pixel group where the intensity exceeds the threshold value of the upper limit and a pixel group where the intensity falls below the threshold value of the lower limit, to be an oil leakage adhered area.

Abstract translation: 本发明的漏油检测器包括图像处理单元，其中，图像处理单元计算在紫外线照射之后物体的彩色图像中的每个像素的饱和度和强度值，绘制强度饱和度 以X轴表示的饱和特性曲线和Y轴表示的强度，以每个饱和度的强度的上限和下限为基准，基于在 并且在强度 - 饱和度特性线中确定与强度超过上限阈值的像素组相对应的区域和强度低于下限阈值的像素组， 漏油附着区域。

公开(公告)号：US20160049268A1

公开(公告)日：2016-02-18

申请号：US14783000

申请日：2014-03-07

Applicant: HITACHI, LTD.

Inventor： Toshiaki ROKUNOHE ,  Tatsuro KATO ,  Jun NUKAGA ,  Tomohiro MORIYAMA ,  Kenji TSUCHIYA

IPC: H01H33/18

CPC classification number: H01H33/182 ,  H01H1/385 ,  H01H9/443 ,  H01H33/64

Abstract: Magnetic force of a permanent magnet can be converted into arc driving force efficiently, and the permanent magnet can be insulated from arc heat so as to suppress magnetic deterioration, whereby breaking performance can be secured over a long period of time. In order to solve the above-described problems, the switchgear of the present invention includes: a fixed side contactor that is provided to a fixed side conductor; a moving contact that can be driven reciprocally with respect to the fixed side contactor, the moving contact being supported by a movable side conductor via a movable side contactor, the moving contact performing opening and closing operation by contacting to and separating from the fixed side contactor; and a permanent magnet generating a magnetic field on an arc to extinguish the arc through the opening operation, the arc being generated between the fixed side contactor and the moving contact, and the permanent magnet is provided on a tip portion of the fixed side conductor to be positioned closer to the movable side contactor side than the fixed side contactor, and the permanent magnet is covered with an insulating member.

Abstract translation: 永磁体的磁力可以有效地转换为电弧驱动力，并且永磁体可以与电弧热绝缘，以便抑制磁性劣化，从而可以长时间确保断裂性能。 为了解决上述问题，本发明的开关装置包括：固定侧接触器，其设置在固定侧导体上; 能够相对于固定侧接触器往复运动的移动接触件，可动接触件通过可动侧接触器由可动侧导体支撑，所述移动接触件通过接触和分离固定侧接触器进行开闭操作 ; 以及在电弧上产生磁场以通过打开操作熄灭电弧的永磁体，在固定侧接触器和可移动触点之间产生电弧，并且永磁体设置在固定侧导体的尖端部分上 比固定侧接触器更靠近可动侧接触器侧，并且永磁体被绝缘构件覆盖。

公开(公告)号：US20140360984A1

公开(公告)日：2014-12-11

申请号：US14295869

申请日：2014-06-04

Applicant: HITACHI, LTD.

Inventor： Tomohiro MORIYAMA ,  Jun NUKAGA ,  Toshiaki ROKUNOHE ,  Masashi KAWAMATA

IPC: H01H33/12

CPC classification number: H01H33/12 ,  H01H33/18 ,  H01H33/64

Abstract: Compact lightweight gas insulated switchgear which assures sufficient electrode fixing strength equivalent to the fixing strength given by brazing and is structurally simple and enables efficient arc rotation with low operating energy. In the switchgear, a movable arcing contact is located on a movable element, opposite to a fixed arcing contact and electrically connected to, or disconnected from, the fixed arcing contact as the movable element moves. The movable arcing contact includes, in order from its tip opposite to the fixed arcing contact, a first electrode as a convex hollow coaxial cylindrical electrode, hollow coaxial cylindrical first spacer, and second electrode as a hollow coaxial cylindrical electrode and has electric conduction means to connect the first and second electrodes electrically through the first spacer. The first and second electrodes are fixed through the first spacer by a fixing member having higher resistivity than the first and second electrodes.

Abstract translation: 紧凑型轻质气体绝缘开关柜，其确保足够的电极固定强度等于由钎焊给出的固定强度，并且结构简单，并且能够以低操作能量进行有效的电弧旋转。 在开关装置中，可移动的电弧触点位于可动元件上，与固定的电弧触点相对，并且随着可移动元件移动，电气连接到固定的电弧触点或与固定的电弧触点断开。 可动电弧接触件从其与固定电弧触点相对的尖端依次包括作为中空同轴圆柱形第一间隔件的凸空心同轴圆柱形电极的第一电极和作为中空同轴圆柱形电极的第二电极，并具有导电装置 通过第一间隔件电连接第一和第二电极。 第一和第二电极通过具有比第一和第二电极具有更高电阻率的固定构件通过第一间隔件固定。