3 Phase Current Calculator
Enter the values of apparent power, VA(VA) and line-to-line voltage, V(V) to determine the value of 3-Phase current, I3(A).
3 Phase Current Formula:
Three-phase current refers to a type of polyphase system and is the most common method used by electrical grids worldwide to transfer power.
It consists of three alternating currents of the same frequency and amplitude but with phases that are offset by one third of a cycle from each other.
This configuration balances loads, minimizes energy losses, and ensures continuous energy transfer.
It is the most common method used by electrical grids worldwide to transfer power. It is also used to power large motors and other heavy loads.
A typical three-phase system has three separate circuits with alternating currents, all reaching their peak values at different times. This provides a smoother and more reliable delivery of power compared to a single-phase system.
3-Phase current, I3(A) in amperes is calculated by dividing the apparent power, VA(VA) in volt-amperes by the product of square root of 3 and line-to-line voltage, V(V) in volts.
3-Phase current, I3(A) = VA(VA) / √3 * V(V)
I3(A) = 3-phase current in amperes, A.
VA(VA) = apparent power in volt-amperes, VA.
V(V) = voltage in volts, V.
3 Phase Current Calculation:
- Calculate the 3-phase current for a system with an apparent power of 12000 VA and a line-to-line voltage of 400 volts.
Given: VA(VA) = 12000VA, V(V) = 400V.
3-Phase current, I3(A) = VA(VA) / √3 * V(V)
I3(A) = 12000 / √3 * 400
I3(A) = 12000 / 692.82
I3(A) = 17.32A.
- Suppose the total 3-phase current in a system is 30 amperes and the line-to-line voltage is 380 volts. Calculate the total apparent power.
Given: I3(A) = 30A, V(V) = 380V.
3-Phase current, I3(A) = VA(VA) / √3 * V(V)
VA(VA) = I3(A) * √3 * V(V)
VA(VA) = 30 * √3 * 380
VA(VA) = 19744VA.