Recently I have installed Type 2 Surge Protective Device SPD 20 to 40kA, Type1+2, Phase + Neutral + Earth (2 Pole 275 Volt AC) (Uc-275VAC, In-20KA, Imax-40KA, Up ≤ 1.5 KV) after 64A DP MCB at home MDB. The home lode is around 1.75KW. We have 220 VAC main line here.
At the evening of 3rd day...