◆ Precise and active power metering function
◆ LCD display, 6 digit display
◆ Simple Installation and use, accurate and reliable operation, stable quality and long life.
| Item | Technical parameter | |
| Model.YX-DDS1277 Single phase electronic watt-hour meter | Model.YX-DTSY1277 Three-phase four-wire electronic prepaid watt-hour meter | |
| Technical standard | GB/T17215.321-2008 | GB/T17215.321-2008、GB/T18460.3-2001 |
| Reference voltage | 220V | 3×220/380V |
| Current specification | Direct access: 5(60)A | Direct access: 3×5(60)A Mutual inductor access: 3×1.5(6)A |
| Accuracy grade | Active Grade 2.0 | Active Grade 1.0, Reactive Grade 2.0 |
| Working temperature | Normal working temperature -25℃～+60℃，Working limit temperature -40℃～+70℃ | |
| Relative humidity | 45%-75% | |
| Frequency range | 50Hz | |
| Static power consumption | <1.5W，10VA | |
| MTTF | ≧10 year | |
| Size (L×W×D) | 165mm×118mm×65mm | 217mm×145mm×70.5mm |