OVERVOLTAGE PROTECTION DEVICE WITH A MEASURING DEVICE FOR MONITORING OVERVOLTAGE PROTECTION ELEMENTS

摘要

The subject matter of the invention is an overvoltage protection device with one or more overvoltage protection elements (TVS, GDT) and a measuring device (1) for monitoring the overvoltage protection elements (TVS, GDT), having an evaluation device (CD), which is designed to count pulse-like overvoltage events which are arrested by the overvoltage protection element (TVS, GDT), wherein the evaluation device (CD) is connected to the overvoltage protection element (TVS, GDT) via a light-measuring device (OS1, OS2), and/or a device for identifying a current which is flowing for a relatively long period of time and which is flowing through the overvoltage protection element (TVS, GDT), wherein the overvoltage protection device additionally comprises an evaluation device (CD) which, on the basis of the counted pulses and/or an identified current flowing for a relatively long period of time, determines whether the overvoltage protection element (TVS, GDT) is still operational, is previously damaged or is unusable, and an alarm device (OUT1, OUT2), which indicates whether the overvoltage protection element (TVS, GDT) is still operational, is previously damaged or is unusable.