Product Overview DDSY1599 single-phase electronic prepaid energy meter is the use of advanced solid-state domestic product advanced, integrated technology and SMT manufacturing process. It has anti-theft, high-precision, high reliability, high overload, low power consumption itself, is the current reform of the electricity system, achieve energy commercialization difficult to solve electricity charges, the ideal product to facilitate unified management of electricity. Products comply with GB / T17215.321-2008 and GB / T18460.3-2001 standards. Functions and Features 1, using DES encryption algorithm dynamic, strong encryption, data security and reliability. 2, using high-power magnetic latching relay, overload, overload of work for a long time without damage. 3, active power measurement, high precision, stable performance, low-power, anti-theft, long-term use without adjustment. 4, having two little remaining battery alarm: normally display alarm and power failure alarm, to remind users to buy electricity. 5, load control function: when the load exceeds a set value, the meter automatically power off, reducing the load for about 5 minutes after the meter automatically restore power. The main technical parameters Rated voltage: 220V Rated current: 5 (20) A 5 (40) A 10 (40) A 15 (60) A 20 (80) A Accuracy: 1 2 Pulse constant: 3200imp / kw? h Rated frequency: 50Hz Working temperature: -25 ℃ - + 55 ℃ Dimensions: 173mm × 115mm × 67mm