Sensor-based remote condition monitoring device and method for disconnector devices

A protection disconnector system comprising:

• a surge arrestor;
• the surge arrestor being connectable to a power distribution or transmission grid;
• a disconnector device;
• the disconnector device being connected in series to the surge arrester between a phase of the power distribution or transmission grid and ground;
• the disconnector device being configured for disconnecting, upon activation of the disconnector device, the surge arrester in case of an overload condition of the surge arrestor;
• a connection status monitoring device;
• the connection status monitoring device being operatively connected to the disconnector device for monitoring an electrical connection status of the disconnector device;
• the connection status monitoring device comprising a determining section and a wireless communication section;
• the determining section being configured to determine whether the disconnector device has been activated and to generate connection status indicator data, indicative of whether the disconnector device has been activated;
• the wireless communication section being adapted to connect to a wireless communication infrastructure using a wireless communication protocol, and to transmit the connection status indicator data over the wireless communication infrastructure;
• the disconnector device comprising an indicator element which is movable;
• the determining section comprising an interaction element;
• the indicator element being moved in response to the disconnector device being activated;
• the interaction element interacting with the indicator element and generating a signal in response to a movement of the indicator element;
• and
• the determining section determining that the disconnector device has been activated in response to receiving the generated signal.