Technical parameters: 1) Rated voltage: AC 200V, 50Hz 2) Specifications: 2.5(10)A, 5(20)A, 10(40)A, 15(60)A 3) Accuracy: Class1, Class2 4) Working temperature range: -20 ~ +55oC 5) Power loss: ≤1.5W 6) Starting current: ≤0.004Ib 7) Executive standards: GB/T17215-2002 and GB/T18460.3-2001 Functions and features: 1) Remind to purchase electricity. When the residual electricity quantity close to overdraft sum, meter will alarm. The alarm's electric quantity value and mode can be set up agilely according to actual need 2) Digital display of various data, the function of returning display is easy for power supply department to manage 3) With the function of preventing electricity from stealing to realize the reliable guards against stealing the electricity truly 4) Particular design of preventing meter crash and many reworking process to protect meter safety working 5) Presell electricity; auto-cut down power when running out, can setup one overdraft sum of the fixed amount 6) One meter with one card has multiply dynamic encryption to assure customers' safety to use 7) The function of supervising electricity supply to assure that data will not be thrown away, and make measuring electricity exactly correct (when power loss, data will be stored) 8) With a function of overload controlling 9) With a strong system software to support management