... 5A, 1A Standard approval: BS7626, IEC44-1 Current transformer 1.Accuracy class:1,0.5,0.5s,0 ... protection:IP 20 4.Secondary current :5ACurrent transformer (CT) is used for measuring electric energy and current, relay ... through 1-3 bus bar is generally used for the purpose of monitoring3) Type 3 (vertical square ... act as the zero-sequence current transformer High Accurace Low Voltage Split Core Current ...