**Reted frequency
**System voltage
**Max. Operating voltage
**Switch rated voltage
**Switch transfer voltage
**Rated short time withstand current
**Rated peak withstand current
**P.F withstand voltage(Phase to phase, phase to earth )
**Rated short circuit breaking current (Current-limited fuse )
**Breaking No-load transformer's capacity
**Rated voltage
**Rated capacity
**Tap-changer scope
**Vector group
**Impedance voltage
**Rated voltage
**Rated current
**Main circuit rated short time withstand current
**Main circuit rated peak withstand current
**Protection degree
**Noise level
**Materia