... ,1600A,3150A 4.Pole:3P,4P MGL Isolation-load switch cab be devided into 18 specs from 125A-4000A ... of module design,it has 3poles and 4poles(3poles+switch neutral pole),applied to make and break circuit or ... electric isolate,over 1000A is only for electric isolation. Conventional thermal current(A)80A100A160A250A400ARated voltage(V ... 417.8 4P4.54.58.711.320.2 Automatic transfer switch