UNE-EN 60051-3/A1:1996 DIRECT ACTING INDICATING ANALOGUE ELECTRICAL MEASURING INSTRUMENTS AND THEIR ACCESORIES. PART 3: SPECIAL REQUIREMENTS FOR WATTMETERS AND VARMETERS.
1996UNE-EN 60051-3/A1:1996 DIRECT ACTING INDICATING ANALOGUE ELECTRICAL MEASURING INSTRUMENTS AND THEIR ACCESORIES. PART 3: SPECIAL REQUIREMENTS FOR WATTMETERS AND VARMETERS.