NPK Engineering & Service Co., Ltd.
Tested energy meters of this manufacturer are listed below. | WO No | 2077959 | | QUA/CAL | | | Report No | 05-1059 | | Country | Thailand | | Type | NP121D, NP123D, NP125D | | Class (Wh) | 2 | | Elements | 1-phase | | Wiring | 2-wire | | Connection | Direct connected | | Technology | Mechanical (ferraris) | | Frequency | 50 | | Current | 5(25), 20(40) or 20(80) | | Voltage | 220 or 230 | | Register | Mechanical | | Standards | IEC 62053-11 |
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