This current transformer, tropicalised for busbar, has a line rated current of 2000 A and a secondary current rating of 5 A.This current transformer do have a 38 mm x 127 mm opening.Compatible with a single output for bar: 127 mm x 38 mm.Burden and accuracy class as follows: class 0.5 maximum power: 15 VA, class 1 maximum power: 20 VA.