... conformed to JB/T8680-2008 Y2 series (IP54) three-phase asynchronous motor’s technical conditions For Y2 series (IP54) three-phase asynchronous motor ... electric motor’s beautification.3, Y2 series (IP54) motor insulation degree is F grade, but for the temperature rise, we still ... use B grade standard, those increase both reliability and exterd.4, Y2 series (IP54 ...