Effects of accuracy on assembling errors of current transformers based on the Rogowski coils

Electronic current transformers based on the Rogowski coils is a novel current sensing technology with broad prospects.The immunity performance to space magnetic field of a Rogowski coil had been discussed form its working principle,focus on the effects of accuracy on Rogowski coils' assembling errors including primary wire's radial eccentric error,primary wire's tilt error and asymmetry error in U-bar structure's primary wire.The results reveal that sensors' accuracy level had improved form 0.5 level to 0.2 level by using reasonable and strict assembling process.