GALVANICALLY SOLATED VOLTAGE MEASUREMENT

摘要

In a, voltage measurement apparatus high - i.e. un-attenuated - voltages are connected to an attenuator (12), which then feeds attenuated voltage waveforms to a microprocessor-based analogue-digital converter/voltage measurement circuit (14). A representative signal voltage signal (16) and: a synchronising signal (18) are then sent across an optical isolation barrier (20), and are then output to metering circuits (22). The metering circuits (22) receive analogue current inputs (24) which are sampled in synchronism with the digital voltage signals for an accurate measurement of power. Safe outputs (26) are provided which are isolated, from any dangerous voltage.