To supply great property against electric jamming, it needs equivalent winding. This kind of performance is up to Rogowski manufacturing process. Other main points are positioning conductor in loop and consider opening clip from external conductor’s sensitivity.
Clamping clip makes sure of high symmetry on both end of coils and accurate mechanism overall. New technology in this field, as special hardware and electric property, possibly makes better accuracy and strong tolerance on conductor’s position. Conductor’s positioning error is not good as ±3% at 50/60Hz generally, but on the other hand, new Rogowski coil has error lower than ±0.5%.
Products:
https://www.hqsensing.com/products-cat/4v-5v-10v-acdc-secondary-output/