公开(公告)号：US20180247780A1

公开(公告)日：2018-08-30

申请号：US15757108

申请日：2016-08-23

Applicant: MEIDENSHA CORPORATION

Inventor： Kazuhiro NAGATAKE ,  Kaoru KITAKIZAKI ,  Keita ISHIKAWA ,  Shota HAYASHI ,  Kosuke HASEGAWA

IPC: H01H33/664 ,  C22C9/00 ,  C22C27/04

CPC classification number: H01H33/664 ,  B22F1/0011 ,  B22F3/15 ,  B22F9/04 ,  B22F2009/043 ,  B22F2201/20 ,  B22F2301/20 ,  B22F2304/10 ,  C22C1/045 ,  C22C9/00 ,  C22C27/04 ,  H01H33/662 ,  H01H33/66207 ,  H01H2033/66223 ,  H01H2201/03 ,  H02B13/035

Abstract: Disclosed is a vacuum circuit breaker (1) including a vacuum interrupter (3) accommodated in a ground tank (2) filled with insulating gas. At least one of a fixed electrode (10) and a movable electrode (11) of the vacuum interrupter (3) uses an electrode material in which particles containing a solid solution of a heat resistant element and Cr are finely and uniformly dispersed and in which Cu textures as a high conductive component are finely and uniformly dispersed. The electrode material contains 20 to 70% by weight of Cu, 1.5 to 64% by weight of Cr and 6 to 76% by weight of the heat resistant element relative to a weight of the electrode material. The particles of the solid solution in the electrode material have an average particle size of 20 μm or smaller.

公开(公告)号：US20180005784A1

公开(公告)日：2018-01-04

申请号：US15540433

申请日：2015-12-25

Applicant: MEIDENSHA CORPORATION

Inventor： Kazuhiro NAGATAKE ,  Akihiro SUWA

IPC: H01H33/662 ,  H01H33/666

CPC classification number: H01H33/66238 ,  H01H33/14 ,  H01H33/662 ,  H01H33/666 ,  H01H2033/566

Abstract: A vacuum circuit breaker includes a ground tank, first and second vacuum interrupters, a link mechanism for opening and closing the vacuum interrupters and a link mechanism case housing the link mechanism and supported by an insulating support tube. An insulating operation rod for operating the link mechanism is provided through the insulating support tube and a side portion of the ground tank. An operation room is provided around the portion of the ground tank through which the insulating operation rod is inserted. A conversion mechanism for driving the insulating operation rod is arranged in the operation room. A space communicating with inner sides of bellows of the vacuum interrupters (including the inside of the link mechanism case and the inside of the insulating support tube) is filled with insulating gas of 0.3 MPa or lower. The other space is filled with insulating gas of higher pressure.