Each performance index of DDSY450 series Single-Phase Electronic Prepaid Watt-Hour Meter / Energy Meter conforms to standard GB/T18460.3-2001 Prepaid Watt-hour Meters, all technical requirements for single-phase electronic watt-hour meters within standard GB/T 17215.321-2008 Alternating Current Static Watthour Meters for Active Energy (Classes 1 and 2).

1. Specified working temperature -10 ~+45
2. Utmost working temperature -25 ~+60
3. Relative humidity: 85% (at environmentaltemperature 23 )
4. There shall be no harmful substances causingcorrosion in the air

1. Meter constant: refer to parameter in the nameplate.
2. Electric parameter: normal working voltage: 0.9~1.1 of reference voltage
Utmost working voltage: 0.8~1.15 of reference voltage Insulation voltage: 2000VAC (power frequency 50Hz) Power consumption: 2W/10VA
3. Data protection: data stored time after power off: 10 years