This current transformer, tropicalised for busbar and cable, has a line rated current of 250 A and a secondary current rating of 5 A. This current transformer do have a 41 mm x 41 mm opening. Compatible with a triple output for bar: 40.5 mm x 10.5 mm or 32.5 mm x 20.5 mm or 25.5 mm x 25.5 mm. Burden and accuracy class as follows: class 0.5 maximum power: 3 VA, class 1 maximum power: 5 VA.