| Item | Performance Parameters |
| Voltage | Rated voltage (UL、CE) | 66VAC L-N 115VAC L-L 230VAC L-N 400VAC L-L 277VAC L-N 480VAC L-L 400VAC L-N 690VAC L-L |
| Rated voltage (CPA) | 3P3L | 3P4L |
| 3x100V 3x380V 3x690V | 3x57.7/100V 3x220/380V 3x400/690V |
| Overload | 1.2 times rating (continuous); 2 times the rating for 1 second |
| Power consumption | <1VA |
| Accuracy class | Error ±0.2% |
| Current | Rated current (UL、CE) | 1A、5A |
| Rated current (CPA) | 0.015-0.075(6)A (Active energy); 3X1(6)A (Reactive energy) |
| Overload | 1.2 times rating (continuous); 10 times the rating for 1 second |
| Power consumption | < 0.2VA |
| Accuracy class | Error ± 0.2% |
| Power | Active, reactive, apparent power, error ± 0.2% |
| Grid frequency | UL、CE | 50Hz / 60Hz, error ± 0.2% |
| CPA | 50Hz, error ± 0.2% |
| Response rate | ≤ 200ms (voltage, current, power) |
| ≤ 1s (electrical energy) |
| Measurement category | 66ULN (＋20%) 115ULL (＋20%) CATⅢ230ULN (＋20%) 400ULL (＋20%) CATⅢ277ULN (＋20%) 480ULL (＋20%) CATⅢ400ULN (＋20%) 690ULL (＋20%) CATⅡ |
| Metering | Electric energy | Active energy: Class D (0.2S); Reactive energy (Class 2 accuracy) |
| Auxiliary power supply | AC/DC 85-300V |
| power consumption ≤ 4W、10VA |
| Electromagnetic compatibility | Electrostatic discharge immunity Class IV |
| Electrical fast transient burst immunity Class IV |
| Surge (shock) immunity Class IV |
| Security | Power frequency withstand voltage | Between communication and signal input, AC4kV 1min |
| Insulation resistance | Input and output terminals to casing >500MΩ |
| Communication | Interface and communication protocol | RS485 interface and Modbus RTU protocol |
| Communication address range | Modbus RTU: 1~ 247; |
| Baud rate | Support 1200bps-38400bps |
| Environment | Operating temperature | -40℃～+70℃ |
| Storage temperature | -40℃～+80℃ |
| Relative humidity | ≤95% (without condensation) |
| Altitude | ≤2000m |
| ≥2000m, ≤5000mOnly applicable to the power supply with the voltage range of AC/DC 85-265V and the voltage below 277/480V. |
| Installation environment | Indoor use (dry location) |
| IP rating | IP54 (Front panel), IP30 (Body) |
| Pollution degree | Class 2 |
| Overvoltage categories | OVC III |
| Reference standard | UL | CAN/CSA C22.2 NO.61010-1-12 UL 61010-1 CSA C22.2 No.61010-2-030 UL 61010-2-030 |
| IEC、CE | IEC 61010-1 IEC EN 61010-2-30 |
| CPA | GB/T17215.321-2021 GB/T17215.323-2022 |
