This round split-core current transformer, desinged to be opened with a twist motion, has a line rated current of 500A and a secondary rating of 5A. The inner diameter of this coil is 101.6mm. Measurement accuracy of the primary rating is 4% from 200A to 300A and 3% above. A flying lead of 3.65 meters with spade connectors is available at the secondary of the transformer. This product received the cURus certification, and CE.