Method and device for permanent disconnection of an electrical circuit with an inductive load by switching two switches

An electric circuit comprising:

• a voltage sources;
• a load resistance;
• an inductive load;
• and
• a device comprising:
• a first switch/switch group and a second switch/switch group connected to each other in series and transferable from a closed state into a separated state for disconnecting the electric circuit, wherein none of the first switch/switch group and the second switch/switch group are configured to securely disconnect the electric circuit permanently by itself;
• and a control unit configured to actuate the second switch/switch group such that the second switch/switch group is transferred from the closed state into the separated state after the first switch/switch group,
• wherein:
• the first switch/switch group and the second switch/switch group are actively transferable from the closed state into the separated state by an actuatable drive, or the first switch/switch group is passively transferable from the closed state into the separated state when the current exceeds a particular nominal value, and the second switch/switch group is actively transferable from the closed state into the separated state by the actuatable drive, and
• the control unit is further configured to transfer the second switch/switch group from the closed state into the separated state as a function of a particular measured current or a particular measured voltage through the first switch/switch group.

A method comprising:

• disconnecting an electric circuit, the electric circuit comprising:
• a voltage source;
• a load resistance;
• an inductive load;
• a device comprising:
• a first switch/switch group and a second switch/switch group connected to each other in series and transferable from a closed state into a separated state for disconnecting the electric circuit, wherein none of the first switch/switch group and a second switch/switch group is configured to securely disconnect the electric circuit permanently by itself;
• and a control unit configured to actuate the second switch/switch group such that the second switch/switch group is transferred from the closed state into the separated state after the first switch/switch group, wherein:
• the first switch/switch group and the second switch/switch group are actively transferable from the closed state into the separated state by an actuatable drive, or the first switch/switch group is passively transferable from the closed state into the separate state when the current exceeds a particular nominal value, and the second switch/switch group is actively transferable from the closed state into the separated state by the actuatable drive, and the control unit is further configured to transfer the second switch/switch group from the closed state into the separated state as a function of a particular measured current or a particular measured voltage through the first switch/switch group, the disconnecting the electric circuit comprising:
• transferring the second switch/switch group from the closed state into the separated state after the first switch/switch group.