3 phase to 2 phase Converter

Enter the 3-phase power rating and select the quantity type into the calculator to determine the equivalent 2-phase rating for the same phase voltage, current, and power factor.

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3 Phase to 2 Phase Formula

The following formula is used to calculate the equivalent 2-phase rating from a balanced 3-phase rating.

P_{2\phi} = \frac{2}{3} P_{3\phi}

For a balanced N-phase system, the total power can also be expressed as P_N = N × V_phase × I_phase × PF.

Variables:

• P_2φ is the equivalent 2-phase power rating
• P_3φ is the original 3-phase power rating
• V_phase is the phase voltage
• I_phase is the phase current
• PF is the power factor

To calculate the equivalent 2-phase rating, multiply the 3-phase rating by 2/3, assuming the same phase voltage, current, and power factor.

What is 3 Phase to 2 Phase Conversion?

3 phase to 2 phase conversion is the process of translating a balanced three-phase power rating into the equivalent rating for a two-phase system under the same per-phase electrical conditions. Since the total power in a balanced system is proportional to the number of phases, a 2-phase system delivers two-thirds of the power of an otherwise comparable 3-phase system. This relationship is useful when comparing equipment ratings, system capacities, and power requirements across different phase configurations.

How to Calculate 3 Phase to 2 Phase Conversion?

The following steps outline how to calculate the equivalent 2-phase value from a 3-phase rating.

1. First, determine the balanced 3-phase power rating.
2. Next, confirm that the phase voltage, phase current, and power factor are assumed to remain the same.
3. Then multiply the 3-phase rating by 2/3 using the formula P_2φ = (2/3) × P_3φ.
4. Finally, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

3-Phase Power Rating (P_3φ) = 30 kW

Equivalent 2-Phase Power Rating (P_2φ) = 20 kW

3 Phase to 2 Phase Conversion Table

The table below lists sample conversions using the relationship P_2φ = (2/3) × P_3φ.

This conversion is commonly used when comparing system capacities or adapting specifications between equipment expressed in different phase formats. If you know the 3-phase rating and the phase conditions are the same, the equivalent 2-phase rating is simply two-thirds of that original value.