Three-Phase Digital Current and Voltage Panel Meter

Technical Specifications

Measurement Accuracy Class：0.2% FS ± 1 digit (reference condition: 25℃ ambient)

Inter-phase Consistency Deviation：< 0.01% FS, ensures accurate 3-phase unbalance calculation

Temperature Drift Coefficient：±50 ppm/℃ across full operating temperature range

Non-linearity Error：< 0.1% FS (best fit straight line method)

Sampling & Display Update Rate：3 times per second, synchronous refresh for all 3 phases

Analog Transmitter Output Accuracy：±0.2% FS, with full temperature range automatic compensation

Analog Output Load Capacity：0 ~ 500 Ω (current output type, supports long-distance transmission)

Output Ripple Noise：< 10 mVpp

Short-term Overload Capacity (Current Input)：2× rated value for 10 s; 10× rated value for 1 s

Short-term Overload Capacity (Voltage Input)：1.2× rated value continuous; 2× rated value for 1 s

Harmonic Suppression Capability：Up to 30th harmonic; measurement error < 0.2% under 10% THD grid

Inter-channel Crosstalk：< 0.01% FS between all phases, no mutual interference

Relay Output Contact Rating：SPST-NO, 3 A @ 250 V AC (resistive load)

Relay Mechanical Endurance：≥ 10,000,000 operations (no-load condition)

Relay Electrical Endurance：≥ 100,000 operations @ rated resistive load

Communication Protocol：Standard Modbus-RTU via RS485 interface

Baud Rate Range：1200 ~ 19200 bps, software configurable

Maximum Communication Distance：1200 m @ 9600 bps (shielded twisted pair cable)

Communication Bit Error Rate：≤ 10⁻¹² (full load, reference ambient condition)

Dimension Chart