Plug-in contact device for preventing an arc when separating a direct current connection

A plug-in contact device for preventing or extinguishing an arc when separating or closing a direct current connection, comprising:

• at least one plug-in connector each comprising a main contact and an auxiliary contact,
• the main contact comprising a first contact half and a second contact half, which are configured to be releasably plugged together, wherein the main contact is configured to:
• electrically conductively connect the first half contact and the second half contact in a plugged-together state of the respective plug-in connector,
• galvanically separate the first half contact and the second half contact in a released state of the respective plug-in connector,
• electrically conductively connect the first half contact and the second half contact in a first intermediate state of the respective plug-in connector between the plugged-together state and the released state and
• galvanically separate the first half contact and the second half contact in a second intermediate state of the respective plug-in connector between the first intermediate state and the released state,
• wherein the auxiliary contact comprises a first contact half and a second contact half which are configured to be releasably plugged together,
• wherein the auxiliary contact is configured to:
• galvanically separate the first contact half and the second contact half in the plugged-together state of the respective plug-in connector,
• galvanically separate the first contact half and the second contact half in the released state of the respective plug-in connector,
• electrically conductively connect the first contact half and the second contact half in the first intermediate state of the respective plug-in connector, and
• electrically conductively connect the first contact half and the second contact half in the second intermediate state of the respective plug-in connector,
• wherein the second half contact and the second contact half are electrically conductively connected;
• and
• wherein the plug-in contact device further comprises an electronic switching unit, a first terminal of which is electrically conductively connected to the first half contact and a second terminal of which is electrically conductively connected to the first contact half, the electronic switching unit being configured to:
• in response to a transition from the plugged-together state into the first intermediate state, electrically conductively connect the first terminal and the second terminal or decrease an impedance between the first terminal and the second terminal and
• in response to a transition from the first intermediate state into the second intermediate state and/or from the second intermediate state into the released state, electrically separate the first terminal and the second terminal or increase an impedance between the first terminal and the second terminal.