| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a switching circuit that facilitates sure separation of a protective control device from the secondary circuit of a CT. <P>SOLUTION: The switching circuit includes an input terminal 30 to be connected to the secondary circuit of a transformer 1, an output terminal 40 to be connected to the protective control device 6, and a contact part group 200 having, as a connection state at each terminal between the input terminal 30 and the output terminal 40, a first state where the input terminal 30 is connected to the output terminal 40, a second state where the input terminal 30 is cut apart from the output terminal 40 and both ends of the input terminal 30 are short-circuited, and an intermediate state where the input terminal 30 is connected to the output terminal 40 and both ends of the input terminals 30 are short-circuited in a transition process between the first state and the second state. <P>COPYRIGHT: (C)2011,JPO&INPIT |
