Electrical activity sensor device for detecting electrical activity and electrical activity monitoring apparatus

摘要

An electrical activity monitoring device based on a sensor device attachable to a power cable of an electrical device for monitoring the electrical status of the electrical device. The device comprises an antenna element which performs the dual functions of magnetically coupling with an electrical pulse generated in the power cable in response to a change of electrical power state of the electrical device and to transmit data to a reader via the power cable. An electrical activity monitoring apparatus is also provided for monitoring the electrical status of at least one electrical device connected to a power supply network by a respective power cable provided with a sensor device. The electrical activity monitoring apparatus comprises a reader and a reader-power line interface device.