Miniature current transformers are crucial equipment in the power sector, primarily employed in various power instruments for measurement and protection purposes. Their most notable attribute is their minimal size, comparable to the size of a fingernail, coupled with their high precision, achieving accuracy levels of up to 0.1. Additionally, miniature current transformers are extensively utilized in power monitoring systems, offering reliable technical support for the real-time monitoring and maintenance of power grids. In the realm of power quality analysis, Miniature current transformers offer in-depth insights into power quality, delivering precise current data that assist users in understanding power quality conditions, enabling effective prediction and prevention of power-related incidents. Due to their compact size and high precision, micro current transformers have become an essential component of modern power systems, ensuring the safe and stable operation of power systems.