| 摘要 |
PROBLEM TO BE SOLVED: To provide a shunt breaker of a direct current that cuts off a load circuit and capacitor of two static capacitances to prevent the accident due to the capacitor charging voltage when opening the breaker, and the switching command reduced to two parts. SOLUTION: Inserted in series into a direct current circuit connecting a direct current source and a load are first and second main switches, a first auxiliary switch operated in association with the first main switch, a second auxiliary switch operated in association with the second main switch, first and second capacitors, and a reactor. A shunt circuit is connected in parallel with the first main switch. A control device is provided to control the operation of the two main switches. An over current tripping device is also provided.
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