Safety device for an electric actuator for opening and closing the hatch of a military vehicle

摘要

The electrical safety switching device is formed as relay circuit with a relay (K5) with self latch (SH), whose closed-circuit contact lies in the load supply line (LV) and its control input (X1) over a closed-circuit contact of another relay (K4) and a break contact of a third relay (K3) is connected in series with load supply line. The control input of latter relay over closed circuit contact of a fourth relay (K2) is connected to a source of supply voltage (u4) and the fourth relay is formed as loss-retarding time delay relay. A fifth relay (K1) is formed as suit-retarding time delay relay.