FIELD: measuring equipment.
SUBSTANCE: invention relates to measurement equipment and is intended for measuring alternating voltage power transmission lines. Measuring device with galvanic isolation for measuring alternating voltage comprises a measuring circuit (35) having a microcontroller, a feed circuit (33), which can perform power measuring circuit (35), a transformer (T), having primary winding fed by network sinusoidal voltage (U1) and connected to power transmission line, and secondary winding. Secondary winding is connected with measuring circuit (35) and with feed circuit (33). Power supply circuit (33) and measuring circuit (35) comprises first and second full-wave rectifier elements (BRG, BRG′) different from each other. Second rectifier element (BRG′) is configured to generate effect of load on secondary winding of transformer (T). Rectifier element (BRG′) loaded on total resistance (R′) with high value.
EFFECT: measurement of AC voltage in power transmission lines.
20 cl, 21 dwg
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