Surge protective devices. The range in composed of varistor and / or GDT Gas Discharge Tube devices, in class I (to protect against direct lightning), class II (for protection from indirect discharges) and Class III (for the protection of equipment). Advantages: the possibility of replacing the single module (varistor or GDT), thermoplastic materials with self-extinguishing degree V0 (UL-94), the optional remote signalization. Products are available to be used for single-phase or three-phase systems, and for any type of earthing system (TT, TN-C, TN-S, IT).

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