TDK Corporation has expanded its CCT series of clamp AC current sensors with two new types that are rated for 300 A and 80 A. The new sensors are designed for use in the power distribution panels in a variety of energy management systems. With a current transformation ratio of 3000:1 the 300-A and 80-A types offer maximum output currents of 100 mA and 26.6 mA, respectively.