DLY lightning surge protection device (referred to as SPD) applies to TT, IT, TN-S, TN-C, TN-C-S and other power supply systems with AC 50/60Hz, 690V and below, to protect the power grid against the lightning or surge overvoltage. The product is mainly used for lightning and operation overvoltage protection of electronic and power supply equipment in the field of communication, railway, computer network, electric power, meteorology, transportation, residence, etc.
