ETITEC over voltage arresters are intended for protection of electrical installations and devices against overvoltage
effects, which may occur in atmospheric discharges and switching overvoltages. The main part of overvoltage arrester
is ZnO non - linear varistor. Its main characteristic is ohmic non-linearity, which depends strongly on the applied
voltage at the clamps. All arresters have modular construction, a special feature is interchanging varistor part and
visual signalization for varistor thermical failure. The signalization is made with red flag, which appeares when failure
occurs. The models with RC mark equipped with auxiliary contacts for signalization.
