公开(公告)号：US20170263398A1

公开(公告)日：2017-09-14

申请号：US15504837

申请日：2015-03-04

Applicant: HITACHI, LTD.

Inventor： Hideaki UCHIYAMA ,  Noriyuki YAGINUMA ,  Daisuke NOMURA ,  Hiroyuki NAKAMICHI ,  Yuji KANEKO

IPC: H01H33/56 ,  H02B13/045 ,  H01H71/02 ,  H01H33/64

CPC classification number: H01H33/56 ,  H01H33/64 ,  H01H33/74 ,  H01H33/91 ,  H01H71/025 ,  H01H2223/044 ,  H02B13/035 ,  H02B13/045

Abstract: A gas circuit breaker having a pair of contacts and a pair of exhaust conductors. An exhaust hole in the pair of exhaust conductors is provided with an insulation cover having an opening. The cover has a guide on an opening end on the side near the pair of contacts and an opening end on the side far from the pair of contacts respectively. The guide has an exhaust hole protective guide and a high-temperature gas passage dividing guide. A first gas flow passage is between an exhaust hole protective guide and a high-temperature gas passage dividing guide, and a second gas flow passage is between the high-temperature gas passage dividing guides. The first gas flow passage is narrower than the second gas flow passage. An end of the exhaust hole protective guide on the first gas flow passage side is projected toward the high-temperature gas passage dividing guide.

公开(公告)号：US20170030799A1

公开(公告)日：2017-02-02

申请号：US15216736

申请日：2016-07-22

Applicant: Hitachi, Ltd.

Inventor： Hisao INAMI ,  Makoto HIROSE ,  Hiroyuki NAKAMICHI ,  Masaru TATEMI ,  Toshiaki ROKUNOHE

IPC: G01M3/32 ,  H02B7/01

CPC classification number: G01M3/3263 ,  H02B13/065 ,  H02B13/0655

Abstract: A gas leak detection device includes a learning section, which has a correlation between a gas temperature inside gas pressure containers and a surface temperature of the gas pressure containers in a learning period corresponding to a current value flowing in the conductor, to make database, and a diagnosis section, which extracts a gas temperature corresponding to the measured current value and the surface temperature from the learning section in a diagnosis period, corrects a gas pressure value corresponding to an arbitrary surface temperature to a gas pressure value of a reference temperature using the extracted gas temperature, and detects a leak of the insulating gas based on the corrected gas pressure value.

Abstract translation: 气体泄漏检测装置包括学习部，其在与在导体中流动的电流值相对应的学习时段内具有气体压力容器内的气体温度与气体压力容器的表面温度之间的相关性，以形成数据库;以及 在诊断期间，从学习部提取与测定的电流值和表面温度对应的气体温度的诊断部，使用该温度校正与任意表面温度对应的气体压力值为基准温度的气体压力值 提取气体温度，并且基于校正后的气体压力值检测绝缘气体的泄漏。