... bedding process 4. poles for VCB The embedded poles of the VYG units totally enclose the vacuum interrupter, CT& PT and ... VoltagekV12/242Rated CurrentA630,1250,2500,3150,40003Rated short circuit breaking currentkA20,25,31.5,404Rated short time withstand currentkA20,25,31 ... .5,405 Rated peak withstand current kA 50,63,80 ...