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23. 发明专利

JPH03205719A GAS-BLAST CIRCUIT-BREAKER 失效
公开(公告)号：JPH03205719A
公开(公告)日：1991-09-09
申请号：JP53390
申请日：1990-01-08
申请人： HITACHI LTD
发明人： ARITA HIROSHI , KUROSAWA YUKIO , TSUKUSHI MASANORI , HIRASAWA KUNIO
IPC分类号： H01H33/88
摘要： PURPOSE:To prolong equivalent shut-able arc time to at least 1.0 cycle and improve supply reliability while eliminating shutting disability even when multi- lightning happenes by connecting a plurality of shutting parts in series electrically and shifting the shortest shut-able arc time to at least 0.5 cycle. CONSTITUTION:A plurality of shutting parts 1, 2 are connected in series electrically and a shut-able arc time is shifted at least 0.5 cycle. The shut-able arc time width 4, 5 of the shutting parts 1, 2 are at least 0.5 cycle and the shortest shut-able arc time F of the shutting parts 2 is shifted 0.5 cycle from the shortest shut-able arc time E of the shutting parts 1 and thus practical shut-able arc time width becomes at least 1.0 cycle. Short-circuitted current owing to the first lightning is shut at the point C by the shutting part 1 but shutting is not able to be carried out at the C point due to multi-lightning and when current zero point moves to G point, shutting is not achieved by the shutting part 1 but by the shutting part 2. In this way, a circuit-breaker which is able to shut even the case of multi-lightning is obtained and supply reliability is improved.

28. 发明专利

JPH01241724A GAS-INSULATED SWITCH 失效
公开(公告)号：JPH01241724A
公开(公告)日：1989-09-26
申请号：JP6811988
申请日：1988-03-24
申请人： TOSHIBA CORP
发明人： ARIMA YUJI
IPC分类号： H01H33/88
摘要： PURPOSE:To obtain a large stroke with an increased length of lever by displacing a connecting section of the lever and a device for operating the lever toward the side opposite to a connecting section of a link and the lever. CONSTITUTION:A link 29 is placed on the same plane with a movable contactor 28 and a lever 30 is placed to move in a plane parallel to the plane on which the link 29 and the movable contactor 28 are placed. On the side of a conductor 25, the link 29 provides an opening 25a in a condition to intersect the movable contactor 28 at right angles so that the connecting section of the link 29 and the lever 30 does not come in contact with a conductor 25. A shaft 33a is coaxially secured to the end of an insulation rod 33. The shaft 33a is journaled with a bearing 25b provided on the side of the conductor 25 at a position displace by the distance L from the movable contactor 28 toward the side opposite to a connection pin 32. One end of the lever 30 is secured to the shaft 33a. The center shaft of the insulation rod 33 is displaced from the center shaft of the movable contactor 28 by the distance L. This provides a long stroke by taking a sufficient length for the lever 30.

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