... prevents unwanted or casual dismounting of connected terminals.Technical Data Pole No:1P,1P+N,2,3P,3P+N,4PRated voltage ... of circuits with devices which cause high current surges(transformers,double-pole motors,motors with heavy start etc.)Nominal voltage:1P (single ... -pole)~230/400V 50/60Hz3P (three-pole)~400V 50/60HzRupturing capacity:EN60898-10,000A(nominal ...