Liberty 310
"Liberty 310 is a three-phase token-less smart meter for pay-asyou-go and managed credit applications. Encrypted vendcodes are used to transfer credit between the online vendingsystem and the meter. Liberty 310 maintains its own energyaccount, which supports multi-rate tariffs with features such aspublic holidays and 'friendly credit' periods.""The meter interfaces with an In-home Display (IHD), whichprovides real-time and historical information on consumptionand accounting. Consumers can readily see how much energythey are using, how much it is costing (per hour), how muchcredit is left and how long it will last, based on the current rateof consumption. Liberty 310 also provides historical data,enabling comparisons such as 'this month against last month'to be made."
| ElectricalConnection type | Direct connected |
| Wiring configuration | 3-phase 4-wire |
| Voltage range | 240 V (L-N) - 20% to +15% |
| Current range | 5-30 A, 10-60 A, 20-100 A |
| Main frequency | 50 Hz 5% |
| Accuracy | Class 1.0 |
| Burden Voltage circuit | < 1.5 W, < 3 VA |
| Current circuit | < 1.0 VA |
| Compliance Standards | IEC 62055-31, IEC 62053-21, IEC 62052-11, IS 13779 |
| Mechanical Dimensions (W x H x D) | 175 x 290 x 130 mm (with extended terminal cover) |
| Enclosure | Engineering plastic |
| Weight | 3 kg (approx.) |
| Sealing | 3 sealable screws on main cover, 2 sealable screws on terminal cover |
| Environmental Temperature | -10 C to +60 C (operating) -25 C to +70 C (storage) |
| Humidity | 95% non-condensing |
| Ingress protection | IP 53 |
| Tariff | Up to 8 rates (slab or time-of-use) |
| Maximum Demand | Up to 8 maximum demand registers |
| Load Survey | 240 parameter/days with 30-minute integration period |
| Communications | PACT optical port for local communication RJ-11 port under terminal cover for In-home Display |