... Sequence Current Transformer Voltage Grade: 0.38kv-66kv Grid Frequency:50Hz Ambient Temperature: -10 - 60 c Zero Sequence Current Transformer1. ... by resin. With beautiful appearance, good hermeticness, high insulation, high sensitivitym, good linearity, easy installation and wide application ... of user.(Neutral ground, unground,ground by high-resistance,low resistance or arc suprression coil.)MRD ...