Detailed Product Description
DDS Type Single-Phase Electronic Kilowatt Hour Meter
1. Purpose
The product is designed and made by large-scale IC to measure consumption of single-phase AC active power.
2. Structure
2.1 Principal measurement chips: AD 7755 chip from USA.
(AD 7751, AD 7755 and China-made measurement chips are available according to customers requirements)
2.2 Housing is made of high-strength flameproof plastics.
2.3 Connection ends are composed of bakelite and copper studs.
2.4 Indication: 6-step stepper motor counter, or LED, LCD indicator.
3. Characteristics
3.1 Precise measurement on forward and reversed active power, both of which accumulate in a same direction.
3.2 Optoelectronic coupler used to output detected signals, LED used to indicate power for monitoring.
3.3 Highly precise.
3.4 Highly sensitive.
3.5 Wide range of load.
3.6 Little energy consumption.
3.7 Highly reliable.
3.8 Little weight.
3.9 AD 7751 chip adopted, indication on power-theft, such as current-reversed and earthing power-theft, etc.
4. Technical data
4.1 Reference standards: GB/T17215-1998 China national standard and IEC 1036 international standard.
4.2 Rated voltage: 220V or 230V, 240
4.3 Rated current: 1.5(6) A, 2.5(10) A, 5(20) A, 10(40) A, 10(60) A, 20(80) A
4.4 Precision: 1.0 grade or 2.0 grade
4.5 Power consumption: voltage circuit2W 10 VA
current circuit2.5 VA
4.6 Start current:≤4% basic current
4.7 Rated frequency: 50 Hz or 60 Hz
