... Sequence Current Transformer Voltage Grade: 0.38kv-66kv Grid Frequency:50Hz Ambient Temperature: -10 - 60 c Zero Sequence Current Transformer1. ... grounds, CT could senses zero-sequence grounding current. To be equiped with relay protector or signal devices, it ... using ABS engineering plastics as casing, poured by resin. With beautiful appearance, good hermeticness, high insulation, high sensitivitym, ...