... bedding process 4. poles for VCB The embedded poles of the VYG units totally enclose the vacuum interrupter, CT& PT and ... face the VI, whereas those are always the headaches for the second geration. These distinctive features also enable the ... DesignationUnitParameter1Rated VoltagekV12/242Rated CurrentA630,1250,2500,3150,40003Rated short circuit breaking currentkA20,25,31.5,404Rated short time withstand ...