2. Differences in accuracy levels: Three Phase Electric Meter accuracy levels are level 1, 0.5s, and 0.2s. The accuracy of Single Phase Electric Meter is level 1 and level 2. Single-phase electric meters can only achieve accuracy of level 1 at most, but three-phase electric meters can achieve 0.5s and 0.2s levels.
3. Difference in reference voltage: Three Phase Electric Meter has more voltage specifications: 3*220/380V 3*57.7/100V. Generally, there is only one voltage specification for Single Phase Electric Meter, which is 220V.