Title:
CIRCUIT BREAKER
Document Type and Number:
WIPO Patent Application WO/2017/046885
Kind Code:
A1
Abstract:
Provided in the present invention is a circuit breaker adapted to high voltage direct currents, capable of stably shutting-off from small currents of 1 kA or lower to such ground-fault currents as those exceeding 1 kA.
The circuit breaker comprises: first switch contacts (1a, 1b) for opening and closing a direct current electric path (200); second switch contacts (2a, 2b), each connected in series to the respective first switch contacts (1a, 1b), for opening and closing the direct current electric path (200); and semiconductor switches (4a, 4b), each connected parallel to the respective second switch contacts (2a, 2b) at both extremities thereof, for opening and closing the direct current electric path (200). The semiconductor switches (4a, 4b) are closed after the first switch contacts (1a, 1b) and the second switch contacts (2a, 2b) have been closed during charging, and are opened after the first switch contacts (1a, 1b) and the second switch contacts (2a, 2b) have been opened at shut-off time.
Inventors:
MIYOSHI NOBUO (JP)
Application Number:
PCT/JP2015/076243
Publication Date:
March 23, 2017
Filing Date:
September 16, 2015
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H01H33/59; H01H73/18
Foreign References:
| JP2002093294A | 2002-03-29 | |||
| JPS627738U | 1987-01-17 | |||
| JP2014241187A | 2014-12-25 | |||
| JPH08106839A | 1996-04-23 | |||
| JP2012248445A | 2012-12-13 | |||
| JPH10334785A | 1998-12-18 |
Other References:
See also references of EP 3352193A4
Attorney, Agent or Firm:
INABA, Tadahiko et al. (JP)
Download PDF: