Method for evaluating the state and the quality of low-voltage networks

A method for evaluating a state and a quality of low-voltage networks, in a branched system of which a plurality of connected loads is located, by determining network measurement data by means of power quality measuring and testing devices and transferring the network measurement data by means of an interface to a control system or in retrievable form to a server,

• wherein overvoltage protection devices employed or employable in the low-voltage network are upgraded to be upgraded overvoltage protection devices for determining network measurement data,
• the overvoltage protection devices having a self-diagnosis unit and a wireless or wired standard interface for data transmission,
• wherein the overvoltage protection devices are upgraded by means of integrated or adapted power quality measuring and testing devices,
• wherein due to the versatile comprehensive employment of the upgraded overvoltage protection devices at most different points of the low-voltage network, a network state map is established, and network state data resulting therefrom in a location and time relation are kept available and can be retrieved by a network operator or supplier.