NF C42-102*NF EN 60051-3:1990 Direct acting indicating analogue electrical measuring instruments and their accessories. Part 3 : special requirements for wattmeters and varmeters.
1990NF C42-102*NF EN 60051-3:1990 Direct acting indicating analogue electrical measuring instruments and their accessories. Part 3 : special requirements for wattmeters and varmeters.