| Rated supply Voltage | AC 220V |
| Operation Voltage Range | AC80V-400V(single phase) |
| Rated Frequency | 50/60Hz |
| Electric Current (>A)setting range | 1-63A |
| Overvoltage (>U) seting range | 250-300V (adjustable) |
| Undervoltage(<U) setting range | 150-190V (adjustable) |
| Electric Leakage Protection | 10-100mA(This feature can be turned off) |
| Error | 2% |
| >U and <U trip delay | 0.5s |
| Reset/Start Delay | 5s-90s |
| Voltage Measurement Accuracy | 1%(Not exceeding1% of the overall range) |
| Rated insulation Voltage | 400V |
| Output Contact | 1NO |
| Altitude | ≤2000m |
| Operating Temperature | -30°C~70°C |
| Power Display Range | 0-99999.9kw/h |