Main features of HSY1 series digital electrical measuring instruments：
- using the modern microprocessor and AC sampling technology
- high precision, display intuitive, good stability, easy use and high reliability any set of PT/CT ratio, strong applicability
- Wide range of applications and easy system integration
- Using true effective value （True-RMS） malgorithm
| technical parameter | Index | ||
| Accuracy grade | Reactive power 1, and the remaining 0.5, Temperature drift coefficient ?100ppm/℃(0-50℃) | ||
| Display mode | Four bit LED display | ||
| Input | Connection mode | Single phase, three-phase three wire, three-phase four wire | |
| Nominal | value | AC100V、AC220V、AC380V | |
| Electric current | AC1A、 AC5A | ||
| overrange | Voltage：1.2 times continuous, instantaneous 2 times / second
Electric current：1.2 times continuous, instantaneous 10 times / second |
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| Power | Voltage：<1VA
Electric current：<0.2VA |
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| impedance | Voltage：>200kΩ
Electric current：<0.1Ω |
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| frequency | 50±5Hz，60±5Hz | ||
| Output (optional) | communication | RS-485，MODBUS-RTU ?Communication protocol | |
| Power Supply | Voltage range | AC/DC85-264V | |
| Power waste | ＜5VA | ||
| insulation resistance | ≥100MΩ@500Vdc | ||
| Power frequency withstand voltage | Power Supply/Between input?2kV/1min(AC RMS value ) | ||
| Using environment | temperature | work：-10℃～+55℃，storage：-25℃～+70℃ | |
| ?humidity | ≤93%RH，No dewing ???Non corrosive gas sites | ||
| altitude | ≤2000m | ||
