This current transformer, tropicalised for busbar, has a line rated current of 400 A and a secondary current rating of 5 A.This current transformer do have a 65 mm x 32 mm opening.Compatible with a single output for bar: 65 mm x 32 mm.Burden and accuracy class as follows: class 0.5 maximum power: 4 VA, class 1 maximum power: 8 VA.