... sine wave detector, showing rms. 3. Accuracy: ≤0.5% of the input full scale ± 2 characters. 4. Sampling rate: ... phase voltage and current meter. Display: three rows of four LED digital display of 9999. Maximum input: voltmeter: 600V, voltage transformer ... in three phase voltage and current meter in the industries of electric power grids, automation, substation automation, power distribution automation ...