Instrument Transformers Inc-Cutler-Hammer, Current Transformer, Ratio 600:5A, 50-400Hz 600V. Ins. Class 10KV Bil., RF 1.33 Acc. Class 0.3 BO.5, Style# 8259A40H01, Cat# 180-SHT-601180-SHT-601 Current Transformer by Instrument Transformers-Cutler-Hammer