Overview
⚡
Calculators
10
🔌
Phase Support
1Φ & 3Φ
📐
Standards
IEC/IEEE
🏭
System
HV/MV/LV
Calculators
📊
Real, Reactive & Apparent Power
P, Q, S Triangle Calculator
S = √(P²+Q²) | P = S×cosφ | Q = S×sinφ | PF = P/S
P (kW)
—
Q (kVAR)
—
S (kVA)
—
PF
—
Current (A)
—
📐
Power Factor Correction
Capacitor Bank kVAR Sizing
Qc = P × (tanφ₁ − tanφ₂) [kVAR] | C = Qc / (2πf × V²) [μF]
Qc (kVAR)
—
Cap. (μF)
—
Current Reduction
—
kVA Reduction
—
🔋
Ohm's Law & DC Power
V, I, R, P — Solve any unknown
V = IR | P = VI = I²R = V²/R | Any two known → solve rest
Voltage (V)
—
Current (A)
—
Resistance (Ω)
—
Power (W)
—
🔆
3-Phase Power Calculator
Line/Phase V, I, P, Q, S
P = √3×VL×IL×cosφ | VL = √3×Vph | IL = Iph (star) | IL=√3×Iph (delta)
Active P (kW)
—
Reactive Q (kVAR)
—
Apparent S (kVA)
—
Phase Voltage
—
Phase Current
—
Phase Angle φ
—
Power/Phase (kW)
—
Connection
—
⚠️
Fault / Short Circuit Current
Symmetrical 3-phase & single-phase fault
Isc = V / (√3 × Z) [3Φ] | Isc = V / Z [1Φ] | MVAsc = kV² / Z(pu)
Fault Current
—
Fault kA
—
Fault MVA
—
System Z (Ω)
—
🔢
Per Unit (PU) System
Base conversion & PU impedance
Z_pu = Z_actual / Z_base | Z_base = V_base² / MVA_base | Z_new = Z_old×(MVA_new/MVA_old)×(kV_old/kV_new)²
Z_base (Ω)
—
I_base (A)
—
Z_pu (from Zact)
—
Z_new_pu
—
🔄
Load Flow (Simple Radial)
Sending/receiving end voltage & power
Vr = Vs − I×(R·cosφ + X·sinφ) | P_loss = I²R | Q_loss = I²X
Receiving Voltage
—
Voltage Drop
—
P Loss (kW)
—
Q Loss (kVAR)
—
🔃
Voltage Unbalance
NEMA & IEC voltage unbalance index
NEMA VUF% = (Max deviation from avg) / Avg × 100 | IEC: V₋/V₊ × 100%
Avg Voltage
—
NEMA VUF%
—
Max Deviation
—
Current Unbal%
—
💡
Energy Consumption & Cost
kWh, bill & demand charge calculator
Energy = P × t [kWh] | Bill = Energy × Tariff + Demand × Demand_rate
Daily kWh
—
Monthly kWh
—
Energy Bill
—
Demand Charge
—
Total Monthly Bill
—
Max Demand (kVA)
—
Cost/kWh Effective
—
Annual Bill
—
🏭
Power System All-in-One Summary
Complete system analysis: Load → Power Triangle → PF Correction → Fault Level → Energy Cost
Full system snapshot: P, Q, S → PF → Correction → Fault current → Cable → Energy bill
Load Current (A)
—
Apparent S (kVA)
—
Reactive Q (kVAR)
—
PF Correction (kVAR)
—
After PF Correction S
—
Current After PFC
—
Fault Current (kA)
—
Fault MVA
—
Daily kWh
—
Monthly Bill (৳)
—
Trafo Loading %
—
Recommendation
—
