ACST-255-1 is a current sense transformer from the ACST-200 series designed for AC current sensing applications. It features a 1:50 turns ratio with an output of 3.75 mV/A ±5%, a maximum load resistance of 0.2 Ohms, and operates within a primary sense frequency range of 50-200Hz. The transformer supports a primary current range of 0.4 to 30A with a maximum primary resistance of 600 microohms and sense resistance of 0.198 Ohms ±10%. Constructed with UL class B 130°C materials, it offers high-voltage isolation with HI-POT ratings of 4000V (P-S) and 1500V (P-C & S-C). This current sense transformer is ideal for power monitoring, energy metering, and current measurement applications requiring reliable and accurate sensing.