Transformer Turns Ratio Calculator
Calculate transformer turns ratio using primary and secondary voltages
Transformer Turns Ratio Calculator
Compliant with IEEE C57.12.00 Standards
Results
Turns Ratio (a): 0.00
Transformer Type: -
Phase Configuration: -
Transformer Rating: -
How to Use Transformer Turns Ratio Calculator
Step 1: Select Configuration
- Choose between Single Phase or Three Phase transformer
- Enter the transformer rating in kVA
- This information helps classify your transformer type
Step 2: Enter Voltages
- Input the Primary Voltage in volts
- Input the Secondary Voltage in volts
- Ensure both values are in the same voltage units
Step 3: Calculate
- Click "Calculate Turns Ratio" button
- View the calculated turns ratio
- Check if it's a step-up or step-down transformer
- Review the step-by-step calculation process
Theory & Applications
What is Turns Ratio?
- Ratio of primary winding turns to secondary winding turns
- Determines voltage transformation relationship
- Key parameter for transformer design and analysis
- Affects current transformation inversely
Transformer Types
- Step-Up: Turns ratio < 1 (increases voltage)
- Step-Down: Turns ratio > 1 (decreases voltage)
- Isolation: Turns ratio = 1 (same voltage)
- Used in power distribution and electronic circuits
Key Relationships:
• Voltage ratio = Turns ratio
• Current ratio = 1/Turns ratio
• Power remains constant (ideal transformer)
Formula & Calculation
Primary Formula:
Where:
• a = Turns ratio
• Vp = Primary voltage
• Vs = Secondary voltage
Real-Life Example
Problem: A single-phase transformer has a primary voltage of 240V and secondary voltage of 120V. Calculate the turns ratio.
Given:
• Primary Voltage (Vp) = 240V
• Secondary Voltage (Vs) = 120V
Solution:
Step 1: Apply the turns ratio formula
a = Vp / Vs
Step 2: Substitute the values
a = 240V / 120V = 2
Result: The turns ratio is 2:1, indicating this is a step-down transformer that reduces voltage by half.
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