Nanjing Yuneng Instrument Co. Ltd.
Tested energy meters of this manufacturer are listed below
| WO No | 2088609 |
| QUA/CAL | |
| Report No | 05-1813 |
| Country | China |
| Type | DDS63 |
| Class (Wh) | 1 |
| Elements | 1-phase |
| Wiring | 2-wire |
| Connection | Direct connected |
| Technology | Static (electronic) |
| Frequency | 50 |
| Current | 5(60) or 10(100) |
| Voltage | 220 |
| Register | LCD |
| Standards | IEC 62053-21 |