| 摘要 |
PROBLEM TO BE SOLVED: To provide a fast switch with which consistency of a main circuit cut-off operation is secured regardless of the amount of fault current by performing a main circuit cut-off operation using discharge current of an external capacitor.SOLUTION: A fast switch according to an embodiment of the present invention includes: a housing 10; a vacuum interrupter 20 provided at the inside of the housing 10 and connected to a main circuit to open/close the main circuit; a contact pressure spring 30 connected to a movable part of the vacuum interrupter 20 to apply contact pressure; an insulation rod 35 coupled with the contact pressure spring 30; a permanent magnet actuator 40 coupled with a lower end of the insulation rod 35 to apply an opening/closing drive force; a first capacitor 45 for supplying discharge current to coil parts 41, 42 of the permanent magnet actuator 40; a drive coil 50 coupled with a lower end of the permanent magnet actuator 40; and a second capacitor 55 for supplying discharge current to the drive coil 50. |
