NF C51-127-4*NF EN IEC 60034-27-4:2018 Rotating electrical machines - Part 27-4 : measurement of insulation resistance and polarization index on winding insulation of rotating electrical machines
2018NF C51-127-4*NF EN IEC 60034-27-4:2018 Rotating electrical machines - Part 27-4 : measurement of insulation resistance and polarization index on winding insulation of rotating electrical machines