JIS C 1111:1989

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This Japanese Industrial Standard specifies AC-DC transducers, hereafter referred to as the \"transducers\", for indoor use which convert such a.c. electrical quantities as voltage, current, active power, reactive power, phase angle, power factor, reactive factor and frequency into d.c. voltages or currents corresponding to the input quantities to the instrument, for the purpose of measurement of such a.c. electrical quantities. Transducers which require external auxiliary power supply are included.