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Comitato Elettrotecnico Italiano

Electrical measuring transducers for converting a.c. electrical quantities to analogue or digital signals
 N EN 60688

Annotation

This International Standard applies to transducers with electrical inputs and outputs for making measurements of a.c. or d.c. electrical quantities. The output signal may be in the form of an analogue direct current, an analogue direct voltage or in digital form. In this case, that part of the transducer utilized for communication purposes will need to be compatible with the external system.

This standard applies to measuring transducers used for converting electrical quantities such as the following:

– current,

– voltage,

– active power,

– reactive power,

– power factor,

– phase angle,

– frequency,

– harmonics or total harmonic distortion,

– apparent power

– to an output signal.

This standard is not applicable for:

– instrument transformers that comply with IEC 60044 series;

– transmitters for use in industrial process applications that comply with the IEC 60770 series;

– performance measuring and monitoring devices (PMD) that comply with IEC 61557-12. Within the measuring range, the output signal is a function of the measurand. An auxiliary supply may be needed.