Detailed Product Description

1. General:
The model DDSY283 Single Phase Prepayment energy Meter, briefly named as single-phase intelligent card watt-hour meter, is used for measuring single-phase AC active energy with rated frequency of 50Hz 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/T18460.3, IEC61036 and JB/T8382-1996. It has strong function of preventing the meter from decoding, compatibility as well as features of small size, weight light and high reliability.

2. 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 pulse frequency to the MPU to accumulate the consumption of the electricity.
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 DDSY283 that has basic functions is as follows:
Fig 1: Working principle (Skim)
3. Basic functions
3. 1. Bi-directional active energy measurement
3. 2. LED display or LCD display
3. 3. Pulse output with optical-coupling isolated
3. 4. Over-load alarm
3. 5. Precaution alarm
3. 6. Power down alarm
3. 7. Purchase reminding

4. Technical Data
Applicable Standard IEC 61036-2000
Service Lifetime  10 years
Accuracy Class Class1, Class2
Working Temperature -30oC~+65 oC
Working Voltage Range 0.7~1.2Un
Power Loss Less than 2W or 10VA

5. Specifications
Rated Voltage 220V, 230V
Reference Frequency 50Hz
Class: Class 1, Class 2
Basic  Current (Maximum Current)A
1.5(6)  5(20)   10(40) 20(80)
2.5(10) 5(30)   15(60) 30(100)
Or design other specified meter