Circuit breaker device

A circuit breaker device comprising:

• a current-carrying contact;
• a first interrupting contact connected in parallel with the current-carrying contact;
• and
• a second interrupting contact connected in parallel with the current-carrying contact and also connected in series with the first interrupting contact, wherein
• the first interrupting contact is constituted by a vacuum circuit breaker in which a closed state and an open state are switched inside a vacuum vessel,
• the second interrupting contact and the current-carrying contact are constituted by a gas circuit breaker in which a closed state and an open state are switched inside an insulating gas vessel filled with an insulating gas, and
• when executing a circuit closing operation for switching an electric circuit from an interrupted state to a current-carrying state, the circuit breaker device executes a first interrupting contact closing operation that switches the first interrupting contact from the open state to the closed state, a second interrupting contact closing operation that switches the second interrupting contact from the open state to the closed state, and a current-carrying contact closing operation that switches the current-carrying contact from the open state to the closed state,
• a completion time point of the first interrupting contact closing operation is at or before a completion time point of the second interrupting contact closing operation, and the completion time point of the second interrupting contact closing operation is before a completion time point of the current-carrying contact closing operation, and
• the circuit breaker device is configured so that when the first interrupting contact closing operation and the second interrupting contact closing operation are completed, current flows through the first interrupting contact and the second interrupting contact, and when the current-carrying contact closing operation is completed, a larger current flows through the current-carrying contact than through the first interrupting contact and the second interrupting contact.