Automatic switching off device to avoid a mains connected appliance such as a cooker or an iron being left on inadvertently and which uses a proximity detector to detect the presence of a person

摘要

The device has a current sensor (15) which determines the presence of a high current in a mains cable leading to the load (10). The device also includes a sensor device (12) with an opening sensor (20) which determines whether a door (16) is open. The sensor device (12) has a presence detector (21) which detects the presence of a person near to the door opening. The sensor device (12) generates an advance signal when the detection signal of the presence detector ends and the door is closed.