This current transformer, tropicalised for busbar, has a line rated current of 1250 A and a secondary current rating of 5 A. This current transformer do have a 55 mm x 129 mm opening. Compatible with a single output for bar: 102 mm x 54 mm. Burden and accuracy class as follows: class 0.5 maximum power: 15 VA, class 1 maximum power: 20 VA.