The residual overvoltage protection function ROVPTOV is used in distribution networks where the residual overvoltage can reach non-acceptable levels in, for example, high impedance earthing.
The function starts when the residual voltage exceeds the set limit. ROVPTOV operates with the definite time (DT) characteristic.
The function contains a blocking functionality. It is possible to block function outputs, the definite timer or the function itself.