Indian Journal of Applied Research, cilt.9, ss.8-9, 2019 (Diğer Kurumların Hakemli Dergileri)
The current grade of current transformer manufacturers are not produced high accuracy and extended range of current Transformer. These special current transformers ratio error are always stable + 0.15 when the primary current changes between 1% and %200. Commonly uses current transformer classes are 0.3 for IEEE standards (1) and 0,2s & 0,5s for IEC standards (2-3). These standards do not guarantee that the current ratio error rate remains at the same value as the primary current changes between 1 % and % 120. Experimental and analytical studies have been carried out on methods in which amper winding , silicon steel and nanocrystalline steel cross section in order to reduce the cost, produce the same quality product in a shorter time with precise and continuous measurement.