| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a solenoid controller which causes to lower an input holding power, can make a cutoff operation faster, and can downsize a trip spring and a trip coil. <P>SOLUTION: The solenoid controller 30 is configured to have a plunger 10 connected to a shaft 1 held movably to a cutoff or input direction of a switchgear, an input coil 6, a trip coil 7, a yoke 9, a braking iron 2, a plurality of springs 11, a permanent magnet 5, and an annular magnetic material 16. The annular magnetic material 16 surrounds a periphery of the plunger 10, is disposed between the input and trip coils 6, 7, and has a gap between the yoke 9 and/or the plunger 10. Further, the material 16 constitutes a path of a magnetic flux generated by a magnetomotive force of the trip coil 7 upon a startup of tripping together with the plunger 10 and the yoke 9; and also constitutes the path of the magnetic flux which is influenced by this magnetic flux to generate the permanent magnet 5 together with the plunger 10, the yoke 9, and the braking iron 2. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
