Low-voltage current transformers are employed in the supporting components of GCS-type low-voltage withdrawable switchgear and Domino modular switchgear, as well as in the protection testing of high-power electrical equipment. They are suitable for use in AC circuits with rated voltages of up to 0.66kV and frequencies of 50Hz or 60Hz for electrical energy measurement and protection. These transformers are characterized by their affordability, high performance, flexible installation, and strong versatility. Due to their high accuracy, linearity, and stability, low-voltage current transformers are widely used in power systems for current measurement, protection, and control. These transformers, with their precision, stability, compact size, and lightweight design, provide vital support for the safe and stable operation of power systems.