Zero Sequence Current Transformer Voltage Grade: 0.38kv-66kv Grid Frequency:50Hz Ambient Temperature: -10 - 60 c Zero Sequence Current Transformer1.Product OverviewWhen circuit grounds, CT could senses ... casing, poured by resin. With beautiful appearance, good hermeticness, high insulation, high sensitivitym, good linearity, easy installation and wide application, it is ...