Effects of radiated electromagnetic fields on measurements performed by air-core passive LPCTs

The increasing interest versus the employment as measuring transformer of air-core current transformers, such as for example Rogowski coils, is mainly due a combination of factors: linearity, bandwidth, no saturation, small size, lightweight. International standard are therefore endorsing specific requirements and the performance of this kind of current sensors must be stressed under different working condition. In this paper, the effect of radiated electromagnetic fields on measurements performed by air-core current transformers are investigated with the aim of verifying if proper EMC tests are needed.