... , reactive power, power factor, frequency, Kwh, 4 quadrant energy, etc. Total 28 electrical parameters;2) 3 lines 4 digit ... unit and optional modules4. 10 years back-up of integrated energy data5. Large LCD, high brightness, auto-scrolling6. High accuracy ... . Power factor—PFa, PFb, PFc, ∑PF6. Frequency7. Active energy—kWh8. Reactive energy– kvarh DW9 Series 3 phase coulometer DW9A-DC38DW9B-DC38DW9C ...