P301 Three phase electricity measurement display boardDetailed product description：

The P101/301 matching power consumption measurement display board is used to detect multiple electrical parameters such as frequency, voltage, current, power, and power factor. The measured signal values are true effective values and are also applicable to signals with waveform distortion. Alarm function can be set, suitable for installation in instruments and equipment that require power testing such as power supplies and electrical equipment.

P301 Three phase electricity measurement display board
Measurement items: AC 3 × U (500V), 3 × I (20A), P (U × I × PF),
F(45Hz-500Hz),PF (0.2-1.0) 
Accuracy level: Level 0.5
Alarm function: Over limit sound and light alarm, relay output (optional)
Display: 4 digits, 0.5 "LED
Working power supply: dual 8.5V power supply or DC9V power supply
Instrument dimensions: 279.5 (length) x 80.5 (width) mm
RS232/RS485 options