NF C42-100-3*NF EN IEC 60051-3:2021 Direct acting indicating analogue electrical measuring instruments and their accessories - Part 3 : special requirements for wattmeters and varmeters
2021NF C42-100-3*NF EN IEC 60051-3:2021 Direct acting indicating analogue electrical measuring instruments and their accessories - Part 3 : special requirements for wattmeters and varmeters