| 摘要 |
An embodiment of the invention relates to a switchgear which includes a control unit, a supply connection and a first current path. The first current path includes a first electromechanical switch and, connected in series to the first switch, a parallel connection of a second electromechanical switch to a semiconductor switch. The switchgear includes an energy accumulator and a measuring device. A control unit is capable of monitoring energy supply coming in through the supply connection. If the energy supply through the supply connection reaches a critical range, the control unit controls the output of the switching signals via the energy of the energy accumulator such that: in a first step, the semiconductor switch is switched to be electrically conducting and the second switch is then opened, and in a second step, the semiconductor switch is switched to be electrically non-conducting and the second switch is then opened. |
| 主权项 |
1. A switchgear, comprising:
a control unit; a supply connection; and a first current path including a first electromechanical switch- and, connected in series to the first switch, a parallel connection of a second electromechanical switch with a semiconductor switch, wherein the control unit is configured to output a switching signal for the first switch-, the second switch and the semiconductor switch, wherein, in the presence of a switching signal, the first and second switches are held in the closed switching state, and wherein the control unit is configured to draw the energy for the switching signals through the supply connection;
an energy accumulator, including at least one capacitor; anda measuring device, wherein the control unit configured to monitor the energy supplied through the supply connection via the measuring device, and wherein, if energy supplied through the supply connection reaches a critical range, the control unit is configured to control the output of the switching signals via the energy of the energy accumulator such that: in a first step, the semiconductor switch is switched to be electrically conducting and then the second switch is opened, and in a second step following the first step, the semiconductor switch is then switched to be electrically non-conducting, and thereafter the first switch is opened. |
