The shell of AKH-0.66 low voltage current transformer is formed by injection molding of flame-retardant and high-temperature-resistant materials. The iron core is wound by oriented cold-rolled silicon steel strip, and the secondary wire is made of high-strength electromagnetic enameled wire. The AKH-0.66 current transformer has novel structure, beautiful appearance, convenient installation, small size, high accuracy and large capacity. The current transformer shells are fixed by ultrasonic welding, so the shells are firmly welded and the sealing performance is good. This current transformer complies with the national standard GB20840.2-2014.