... 1P+N,2,3P,3P+N,4PRated voltage:AC 230/400VRated current(A): 1,2,3,4,6,10 ... of circuits with such devices which cause some current surges(groups of bulbs, motors etc.)D The ... protection of circuits with devices which cause high current surges(transformers,double-pole motors,motors with heavy ... the worse input of a conductorThe input and output can be interchangedThey enable more conductors as well ...