LED Display Prepaid meter

single phase Prepaid meter DDSY450 have register disply, and LCD display (7 number). Working temperature: -10degree 45degree Relative humidity: Not more than 85% Most working temperature: -25degree 60degree Working voltage: 0.9 1.1 reference voltage Utmost working voltage: 0.0 1.15 reference voltage Insulation voltage: More than 2000VAC Power consumption: Not more than 2w/10vA Data protection: At least 10 year when the power off 2. Main function and feature A. Measure active electric energy, it would not adjust long time work B. Purchase electric first and then use it C. It will alarm when the residual energy is lack of D. Record information of power utilization E. One card for one user, it have anti tamper function F. Display residual electric cummulating and alarm electric G. It have reading user power utilization information backward function H. Test pulse of electric energy output I. Service time 10 year J. Rated voltage 110v 120v 220v 230v Current 1.5(6) A 2.5(10)A 5(20)A 10(40)A 15(60)A 20(80)A Outline & installation size: