This round split-core current transformer, desinged to be opened with a twist motion, has a line rated current of 1000A and a secondary rating of 1A. The inner diameter of this coil is 152.4mm. Measurement accuracy of the primary rating is 4% from 200A to 300A, 3% from 400A to 500A, then 2% from 600A to 800A and 1% 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.