Each DC surge arrester in the range has a specific application: Incoming protection(type 2): The Slocable-SPD-1000V is recommended for a high risk level Secondary protection (type 2 or 3):
The Slocable-SPD-1000V ensures secondary protection of loads to be protected and is placed in. Cascade with the incoming solar surge arresters. This surge arrester is required when the loads to be protected are at a distance of more than 10 m from the incoming surge arrester.
The Slocable DC surge arresters with "r" indication have remote transfer of the information: "cartridge to be re placed". Slocable withdrawable surge arresters allow quick replacement of damaged cartridges. Type 2 surge arresters are tested with a 8/20 as current wave. Type 3 surge arresters are tested with a 1.2/50 as and 8/20 as combined wave.