Description

The model DDSY**0 single phase prepaid electronic meter, briefly named as single-phaseintelligent card watt-hour meter, is used for measuring single-phase AC active energy with rated frequency of *0Hz to realize using electric power after prepayment. The product adopts CPU card (named as smart card) and advanced micro-electronic technique to collect, process and memorize data. Its technical performances are complying with the requirements of national standards of GB/T****0.3, IEC****6 and JB/T********6. It has strong function of preventing the meter from decoding, compatibility as well as features of small size, light weight and high reliability. Work principle: There are two basic function modules in the meter separately named the energy metering module and the MPU controller module. The energy-metering module adopts well-selected special integrated circuits as will send the pules frequency to the MPU to accumulate the consumption of the electrictiy. The MPU controller module transfers message between the prepaid card and the port of card to realize the prepaid metering function and other appointed function. The working principle of DDSY**0 that has basic functions is as follows: Basic functions 1. Bi-directional active energy measurement 2. LED display or LCD display 3. Pulse output with optical -coupling isolated 4. Over-load alarm 5. Precaution alarm 6. Power down alarm 7. Purchase reminding Technical Data Applicable Standard IEC*********0 Service Lifetime *0years Accuracy Class Class1,Class2 Working temperature **0 ~**5 degree Working voltage range 0.7~*2Un Power loss less than 2w or *0VA Specifications Rated voltage **0V,**0V Reference Frequency *0Hz Class class1, class2 Basic Current (Maximum current) A 1.5(6) 2.5(*0) 5(*0) 5(*0) *0(*0) *5(*0) *0(*0) *0(**0)