... Zero Sequence Current Transformer Voltage Grade: 0.38kv-66kv Grid Frequency:50Hz Ambient Temperature: -10 - 60 c Zero Sequence Current Transformer1. ... circuit grounds, CT could senses zero-sequence grounding current. To be equiped with relay protector or signal ... by resin. With beautiful appearance, good hermeticness, high insulation, high sensitivitym, good linearity, easy installation and wide ...