UNE-EN 60051-3:1993 Electrical measuring instruments, analog display direct action and accessories. Part 3: Requirements for power meters and transformers (Official version 60051-3:1989)
1.1 Part 3 of the standard applies to wattmeters and varimeters with direct reading analogue indication. NOTE – For multi-function instruments, see Part 7. 1.2 This part of the standard also applies to non-interchangeable accessories that are used with wattmeters and varimeters (these accessories are defined in section 2.1.15.3 of Part 1). 1.3 to 1.8 See Part 1.
UNE-EN 60051-3:1993 history
1996UNE-EN 60051-3/A1:1996 DIRECT ACTING INDICATING ANALOGUE ELECTRICAL MEASURING INSTRUMENTS AND THEIR ACCESORIES. PART 3: SPECIAL REQUIREMENTS FOR WATTMETERS AND VARMETERS.
1993UNE-EN 60051-3:1993 Electrical measuring instruments, analog display direct action and accessories. Part 3: Requirements for power meters and transformers (Official version 60051-3:1989)