kVA to Amperage Calculator
Convert kilovolt-amperes to amperes for electrical systems
Electrical Power Conversion
Select the electrical system configuration
Apparent power in kilovolt-amperes
System voltage
Calculation Results
Current (Amperage)
Wire Size Recommendation
Formula used: I = S / V
Calculation: I = 50 kVA ÷ 0.480 kV = 104.17 A
Load distribution: Single Phase
Important Notes
Example Calculation
Example: 50 kVA transformer at 480V three-phase
Given:
• Apparent Power (S) = 50 kVA
• Voltage (V) = 480V (line-to-line)
• System = Three-phase
Calculation Steps
I = S / (√3 × V)
I = 50 kVA / (√3 × 0.48 kV)
I = 50 / (1.732 × 0.48)
I = 50 / 0.831
I = 60.17 A
Formula Quick Reference
Common Applications
Standard Voltages
Safety Tips
Always de-energize circuits before working
Include 25% safety factor for wire sizing
Consider temperature derating factors
Always consult local electrical codes
Understanding kVA to Amperage Conversion
Apparent Power vs Current
kVA (kilovolt-amperes) represents apparent power, which is the total power in an AC electrical system. Current (amperage) is the actual flow of electrical charge. Converting kVA to amperage helps determine the current requirements for electrical systems and proper wire sizing.
Phase Configurations
- •Single-phase: Common in residential applications
- •Three-phase: More efficient for industrial use
- •Line-to-line: Voltage between any two phases
- •Line-to-neutral: Voltage from phase to neutral
Practical Applications
Transformer Sizing:
• Determine primary and secondary current ratings
• Size protection devices and disconnect switches
• Calculate wire and conduit requirements
Load Analysis:
• Electrical panel load calculations
• Motor starting current estimation
• Power distribution planning
Safety Considerations
- Wire Sizing: Include safety factors and derating
- Protection: Proper overcurrent protection devices
- Code Compliance: Follow NEC and local requirements
- Load Factor: Consider demand and diversity factors