Protection Engineering Basics and Schemes Protection Engineering | Page 61
1.4.2.7 Polarity Test:
It is same as CT, but in case of CVT you need to test polarities of associated Capacitors also.
Connection Drawings of CTs and PTs:
Connection is depend on required operation for protection
In Star Connection of CTs, you knew the current remain same in all phase but Line Voltage( V L) = √3V phase Line Voltage is line to line or phase to phase Voltage, Phase voltage is Phase to ground voltage. In star connect Current flow remain same between line to line and line to neutral( Phase current), neutral current is zero in balance condition.