Single-Phase Electronic Prepayment Meter (DDSY283)

1 Introduction
The model DDSY283 single-phase electronic prepayment 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. It has strong function of preventing the meter from decoding, compatibility as well as features of small size, light weight and high reliability.

2. Specification
A. Accuracy Class: Class 1;
B. Rated Voltage(V): 220, 230;
C. Rated Current (A): 5(30), 10(40), 20(80), 30(100);

3. Main technical data
A. Meter constant: 1600imp/kWh
B. Basic error(refer to table 2)
C. Starting. The meter shall start and continue to register at 0.4%Ib(for class 1) and reference voltage, reference frequency and unity power factor
D. Running with no load. When 115% reference voltage is applied with no current flowing in the current circuit, the test output of the meter shall not produce more than one pulse.
E. Electric Parameter
--Normal operating voltage: 0.9 to 1.1 rated voltage
--Maximum operating voltage: 0.8~1.15 rated voltage
--Insulation voltage: ≥2000VAC
--Power dissipation ≤2W &10VA
F. Humidity Range:
Annual mean humidity: ≤75%
--For 30 days, these days being spread in a natural manner over one year: 95%
--Occasionally on other days: 85%.
G. Dimension: 178mm*128mm*57.9mm Weight: About 1kg