... c)voltage:380v,660v,6kv,3kv,10kv d)poles:2p 4p 6p 8p 10p e)Protec: IP23 ... . Y,YR series are the basic series with enclosure protection degree IP23. Removing the protection ... voltage endurance test to ground and vacuum pressure impregnated with solvent-free varnish. Therefore, the motor is ... is of class F insulation and vacuum pressures impregnated with solvent-free varnish. AII the brazed points and ...