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11. 发明专利

JPH04197007A GAS INSULATED CLOSED DISTRIBUTOR 失效
公开(公告)号：JPH04197007A
公开(公告)日：1992-07-16
申请号：JP32766390
申请日：1990-11-28
申请人： HITACHI LTD
发明人： IZUMI SADAO , SHIROMIZU TATSUJI
IPC分类号： H02B1/20 , H02B3/00 , H02B13/02
摘要： PURPOSE:To simplify the charge work of gas at installation by operating a check valve with the bus, which connect the panels in rows with each other, and putting the adjacent closed distribution panels and the bus chamber, which connects the panels in rows, in the same gas division. CONSTITUTION:Epoxy bushings 11 provided with check valves 10 are projected respectively from adjacent closed distribution panels 1a and 1b, and the check valve 10 is operated with the buss 2A and 2B, which connect the panels in rows, and the adjacent closed distribution panels 1a and 1b and the bus chambers (gas ducts) 12 and 13, which connect the panels in rows, are put in the same gas division. By doing it this way, the gas charging work in installation can be simplified, and a gas insulating closed distributor, which enables the work efficiency in installation to be minimized, can be gotten.

13. 发明专利

JPS62108510A TRANSFORMER FOR VEHICLE 失效
公开(公告)号：JPS62108510A
公开(公告)日：1987-05-19
申请号：JP24708485
申请日：1985-11-06
申请人： HITACHI LTD
发明人： UCHIYAMA TADATAKA , IZUMI SADAO , MURAOKA MINORU , MIURA AKIZUCHI
IPC分类号： H01F27/02
摘要： PURPOSE:To reduce the size and weight of a transformer by dividing a tank into two tanks, containing the transformer in one tank, sealing insulating oil, containing a vacuum breaker and an arrester in the other tank, and sealing insulating gas. CONSTITUTION:A breaker body 3 and an arrester 4 are contained in a lower tank 7 of a transformer, and partitioned by a partition plate 6 from a transformer body (a winding 8 and a core 10). The arrester 4 and the winding 8 are connected through a wall bushing 5, energized, insulating gas 61 (SF6, or Ar) is sealed in the breaker side, and an insulating distance from the plate 6 and the tank 7 is minimized. Insulating oil 62 (silicone oil, or mineral oil) is sealed in the transformer side, forcibly circulated by a pump 9 to improve cooling performance. The winding 8 uses high heat resistance insulator (polyamide insulator, polyamide insulating paper, amine-added heat resistant paper) to raise the temperature rising limit. Thus, the size and the weight are reduced.

19. 发明专利

JPS62256331A DC BREAKER 失效
公开(公告)号：JPS62256331A
公开(公告)日：1987-11-09
申请号：JP10027386
申请日：1986-04-30
申请人： HITACHI LTD
发明人： MIZUNO SATORU , IZUMI SADAO , OGA EIGO , OSHIMA MASABUMI , TSUDA HIDEAKI , SATO MOTOO
IPC分类号： H01H33/59 , H01H33/42

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