Switchgear Calculator Suite
Comprehensive tools for switchgear design: Volts to Amps, Volts to Watts, voltage drop calculation (cables & busbars), and permissible voltage drop analysis. Supports single-phase/three-phase systems with industry standards compliance.
Volts to Amps Visualization
Current Calculation Formula
I = (P × 1000) / (√3 × V × PF)
Three-Phase Current Calculation
I = Current (A), P = Power (kVA), V = Voltage (V), PF = Power Factor
Typical Power Factor Values
Resistive Loads
0.95 - 1.0
Induction Motors
0.75 - 0.90
Transformers
0.85 - 0.95
Mixed Loads
0.80 - 0.90
Calculate Current (Volts to Amps)
Current Calculation Result
Calculated Current
120.3 A
Full-load current
Apparent Power
100.0 kVA
S = V × I × √3
Real Power
90.0 kW
P = S × PF
Reactive Power
43.6 kVAR
Q = √(S² - P²)
Calculation Breakdown
System Type: Three-Phase (3Φ)
System Voltage: 480 V
Power Input: 100 kVA
Power Factor: 0.9
Formula Used: I = (P × 1000) / (√3 × V)
Calculation: (100 × 1000) / (1.732 × 480) = 120.3 A
Recommendation: Select switchgear rated for minimum 120.3 A continuous current
Standard Reference: NEC 408.30 - Switchgear Rating Requirements