⚙ CircuitSecrets
Power Factor Calculator Dashboard
Complete engineering suite for power factor calculation, capacitor sizing, APFC steps, harmonics, and penalty analysis.
Calculator 01
Power Factor from P, Q, S
PF = cosφ = P/S | S = √(P²+Q²) | φ = arctan(Q/P)
Calculation Results
Power Factor Meter
0.00.50.70.850.951.0
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Power Factor
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Phase Angle φ
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P (kW)
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Q (kVAR)
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S (kVA)
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Calculator 02
Capacitor Bank Sizing
Qc = P×(tanφ1−tanφ2) | C = Qc×10&sup6; / (2πf×V²) [μF] per phase
Calculation Results
Qc Required (kVAR)
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Cap per Phase (μF)
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Current Saved (A)
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kVA Reduction
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Before: S (kVA)
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After: S (kVA)
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Loss Reduction
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Calculator 03
PF from Meter Readings
PF = kWh / kVAh | PF = W / (V × I) [1Φ] | PF = W / (√3×VL×IL) [3Φ]
Calculation Results
PF (from Energy)
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PF (from V, I, P)
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Phase Angle φ
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Load Type
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Calculator 04
PF Penalty & Incentive
Penalty if PF < threshold | Incentive if PF > threshold | % adjustment on bill
Calculation Results
PF Steps from Ref
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Penalty / Rebate %
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Amount ৳
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Adjusted Bill ৳
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Calculator 05
Auto PFCR Step Calculator
Steps = Qc_total / Step_size | Min steps ≥ 4 for APFC relay accuracy
Calculation Results
Step Size (kVAR)
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Cap per Step (μF)
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Total Steps
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Calculator 06
Reactive Power & kVAR
Q = √(S²−P²) | Q = P×tanφ | tanφ = Q/P
Calculation Results
Q (kVAR)
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S (kVA)
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tan φ
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Current (A)
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Power Triangle Phasor
Calculator 07
True PF vs Displacement PF
True PF = DPF × PF_dist | PF_dist = 1/√(1+THD²) | THD% = √(ΣIh²)/I1 × 100
Calculation Results
Displacement PF
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THD%
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Distortion Factor
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True PF
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Calculator 08
Energy Saving from PF Improvement
ΔI²R = I1²R − I2²R | ΔI% = (1 − PF1/PF2) × 100
Calculation Results
Before Current
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After Current
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Current Reduction
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I²R Loss Reduction
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Daily Saving (kWh)
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Monthly Saving ৳
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Annual Saving ৳
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Calculator 09
Detuned Reactor Sizing
L = (p% × V²) / (2πf × Qc) | Vc = V / (1 − p%) | fr = f / √p%
Calculation Results
Reactor Inductance (mH)
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Capacitor Voltage Rating
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Resonance Freq (Hz)
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Reactor Power (kVAR)
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Calculator 10
PF All-in-One Summary
Full analysis: PF → Capacitor sizing → Bill saving → Payback period → Recommendation
Calculation Results
Current Before (A)
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Current After (A)
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Qc Required (kVAR)
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Cap Bank Cost ৳
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PF Penalty ৳
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kVA Reduction
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Monthly Saving ৳
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Payback Period
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Annual Saving ৳
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5-Year Saving ৳
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Recommendation
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Data Management
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