... pure electromagetic type, which can break off fault circuit rapidly in order to avoid occurrence of accident. ... switch won't be influenced by ambient temperature and lightning.Working principleSpecification Electrical featuresRated current InA16, 25, 32, 40, ... fuseA 6000Rated voltage UeV230/400Insulation voltage UiV500Rated frequencyHz50/60Short-circuit current IΔA4500, 6000Rated sensitivity IΔnA0.01, ...