Description

Three Phase T1/2/3 Lightning and surge arrester for LPL III and IV

This range of lightning and surge arresters are configured in 3+1 and 1+1 (CT2 according to BS 7671), allowing for installation in TN-S, TN-C-S and TT earthing systems. This configuration is required for TT earthing systems where an RCD is not used, or the surge arrester is installed on the supply side of the RCD. These arresters are designed for use at the boundary of LPZ 0 to LPZ 1 in structures of LPL I and LPL II (Class I and II Lightning Protection System) as a Type 1 lightning arrester. They are also Type 2 and Type 3 tested for use in sub-distribution boards and local equipment protection.