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1. 发明专利

DE69302716T2 未知
公开(公告)号：DE69302716T2
公开(公告)日：1997-01-02
申请号：DE69302716
申请日：1993-01-28
申请人： HITACHI LTD
发明人： OUCHI SHIGETOSHI , HONDA HARUO , YOSHIDA TORU , KUGOH YUKIO , ICHIKAWA FUMIHISA , KANNO TUTOMU , ICHINOSE TAKASHI , TSUDA HIDEAKI
IPC分类号： H01H9/30 , H01H9/42 , H01H33/59 , H01H33/66
摘要： A commutating type DC circuit breaker arrangement comprising : a vacuum circuit breaker (7) having a movable electrode and stationary electrode; a series circuit (6) of a capacitor (8), a saturation reactor (9) and a commutating switch (10) which is connected in parallel with the vacuum circuit breaker; and means (21) for detecting a predetermined electrode open position at which a sufficient insulating distance between the movable electrode and the stationary electrode is maintained via movement of a predetermined position on an actuating rod for the movable electrode and for closing the commutating switch in response to the detection of the predetermined electrode open position.

2. 发明专利

DE69302716D1 未知
公开(公告)号：DE69302716D1
公开(公告)日：1996-06-27
申请号：DE69302716
申请日：1993-01-28
申请人： HITACHI LTD
发明人： OUCHI SHIGETOSHI , HONDA HARUO , YOSHIDA TORU , KUGOH YUKIO , ICHIKAWA FUMIHISA , KANNO TUTOMU , ICHINOSE TAKASHI , TSUDA HIDEAKI
IPC分类号： H01H9/30 , H01H9/42 , H01H33/59 , H01H33/66
摘要： A commutating type DC circuit breaker arrangement comprising : a vacuum circuit breaker (7) having a movable electrode and stationary electrode; a series circuit (6) of a capacitor (8), a saturation reactor (9) and a commutating switch (10) which is connected in parallel with the vacuum circuit breaker; and means (21) for detecting a predetermined electrode open position at which a sufficient insulating distance between the movable electrode and the stationary electrode is maintained via movement of a predetermined position on an actuating rod for the movable electrode and for closing the commutating switch in response to the detection of the predetermined electrode open position.

3. 发明专利

JPH0392439A DC FEEDER CIRCUIT SYSTEM 失效
公开(公告)号：JPH0392439A
公开(公告)日：1991-04-17
申请号：JP22917989
申请日：1989-09-06
申请人： HITACHI LTD
发明人： OUCHI SHIGETOSHI , SHIROMIZU TATSUJI , OIDE SHINICHI , ICHINOSE TAKASHI , KANNO TSUTOMU
IPC分类号： B60M3/06 , H01H33/59 , H02J1/00
摘要： PURPOSE:To lessen an energy absorbing device in number by connecting No.1 diode which sends electric current to the direction of the energy absorbing device, between each of the other ends of respective DC breakers and one end of the energy absorbing device, and thereby connecting a diode which sends electric current to the direction of a common conductor, between the other end of the energy absorbing device and the common conductor. CONSTITUTION:If short circuit failures occur at one end sides of DC breakers 10A through 10C, short circuited current flows to an energy absorbing device 6 through DC breakers and No.1 diodes 12A through 12C so that a circuit is thereby formed, through which the discharge current of the energy absorbing device 6 flows into a common conductor 1 through a diode 14. By this constitution, it is good enough that one energy absorbing device which is common to a plurality of the DC breakers, is installed, and a DC feeder circuit can thereby be made small in size while manufacturing cost can be lowered.

4. 发明专利

JPH05234472A 失效
公开(公告)号：JPH05234472A
公开(公告)日：1993-09-10
申请号：JP3311792
申请日：1992-02-20
申请人： HITACHI LTD
发明人： OUCHI SHIGETOSHI , HONDA HARUO , YOSHIDA SUSUMU , KUGO YUKIO , ICHIKAWA FUMIHISA , KANNO TSUTOMU , ICHINOSE TAKASHI , TSUDA HIDEAKI
IPC分类号： H01H9/30 , H01H9/42 , H01H33/59 , H01H33/66
摘要： PURPOSE:To securely interrupt a DC current so as to prevent the enlargement of an accident by opening an electrode from the other electrode of a vacuum breaker is a DC circuit breaker as well by providing a switch at the make electrode position, and making a commutator switch due to its operation. CONSTITUTION:When a DC current 'i' is interrupted by means of a commutator type DC breaker 3 provided in a DC circuit 2, a vacuum breaker 7 provided in the circuit drives an operating machine 19 so as to move one operating rod 18 and a rod 16 in the arrow direction and move a movable electrode 14 so as to draw a movable electrode 14 from a fixed electrode 13, and an arc current 'i' flows between both electrodes 13 and 14 while the operating rod 18 presses a relay 21 so as to make a commutating switch 10 at such an opening electrode portion where the insulating distance between both electrodes 13 and 14 is sufficiently kept. A commutator current 2i is superimposed on the arc current 'i', so that the arc current is formed into an AC waveform resulting in a sure interruption at a zero-crossing point of the current. If an electrode break speed of the vacuum breaker 7 is delayed, the relay 21 does not operate unless at the opening electrode position where the insulating distance between both electrodes are secured, so that the commutator switch 10 does not make thereby causing no restrike.

5. 发明专利

JPH0520979A VACUUM CIRCUIT BREAKER 失效
公开(公告)号：JPH0520979A
公开(公告)日：1993-01-29
申请号：JP19734191
申请日：1991-07-12
申请人： HITACHI LTD
发明人： OUCHI SHIGETOSHI , WADA TSUYOTOSHI , YOSHIDA TORU , YAMADA YASUNARI , ICHINOSE TAKASHI
IPC分类号： H01H33/66
摘要： PURPOSE:To reduce the quantity of components and provide a vacuum circuit breaker having high current interruption capability. CONSTITUTION:Short rings 61 are jointed to movable conductors 15 led out after connection to the movable electrodes 14 of vacuum circuit breakers 1 and 2. In addition, there are provided electromagnetic resilient coils 60 to apply an electromagnetic resilient force to the short rings 60 as an operation force acting in a direction for current interruption. The coils 60 are so arranged near the vacuum circuit breakers 1 and 2 as to give parallel magnetic field to arc generated between a stationary electrode 16 and the movable electrode 14 parting therefrom.

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