Title:
DIRECT CURRENT CIRCUIT BREAKER AND OPERATION METHOD FOR DIRECT CURRENT CIRCUIT BREAKER
Document Type and Number:
WIPO Patent Application WO/2018/135664
Kind Code:
A1
Abstract:
[Problem] To achieve a small-scale circuit that suppresses arc discharge when high-voltage direct current is cut off. [Solution] According to the present invention, direct-current voltage is applied between a terminal T1 and a terminal T2, and a load is connected between a terminal 3 and a terminal T4. When a switch SW2 is open, an initializing unit 11A pre-discharges a capacitor C1 and zeroes the charge thereof. When it has been detected that a switch SW1 has begun to open, switch SW2 closes. Then, because the charge of the capacitor C1 has been initialized to zero, the current flowing in a current-limiting reactor L1 flows into the capacitor C1 and charges the capacitor C1. As a result of the current flowing into the capacitor C1, the potential of an electrode A of switch SW1 drops. When the potential of the electrode A has dropped to close to the potential (0 V, for example) of terminal T2 (terminal T4), switch SW1 opens. Because switch SW1 opens when the potential of the electrode A has dropped, there is no arc discharge.
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Inventors:
HANEDA MASAJI (JP)
Application Number:
PCT/JP2018/001891
Publication Date:
July 26, 2018
Filing Date:
January 23, 2018
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
H01H33/59; H01H9/54
Foreign References:
| JP2016213192A | 2016-12-15 | |||
| JP2016173971A | 2016-09-29 |
Attorney, Agent or Firm:
KOJIMA Takiro (JP)
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