| 摘要 |
A switching device comprising at least two operating coils (21, 22, 41, 42) for controlling at least two magnetic circuits (51, 52), a control unit (35) which controls the voltage supplied to the operating coils, and individual demagnetization circuits (31, 32) connected to each operating coil for achieving a simultaneous opening of the at least two magnetic circuits from all the operating coils.
|
