Enter any two known values into the calculator and leave the unknown field empty to calculate its value.
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3 Phase Voltage Formula
The following equation is used to calculate the relationship between line voltage, phase voltage, and the conversion factor.
LV = PV \times CF
- Where LV is the line voltage (V)
- PV is the phase voltage (V)
- CF is the conversion factor
To calculate the missing parameter, supply the two known values and leave the unknown field empty.
What is a 3 Phase Voltage?
Definition:
Three-phase voltage refers to the relationship between the line and phase voltages in a three-phase power system. The conversion factor is used to correlate these two values and depends on the system’s configuration.
How to Calculate 3 Phase Voltage?
Example Problem:
The following example outlines the steps and information needed to calculate the missing value in a three-phase system.
First, enter the phase voltage. In this example, the phase voltage is 230 V.
Next, enter the conversion factor. In this example, the conversion factor is 1.732.
Leave the line voltage field empty to compute its value.
Finally, calculate the line voltage using the formula above:
LV = PV × CF
LV = 230 × 1.732
LV = 398.36 V
FAQ
What is the conversion factor used for in a three-phase system?
The conversion factor links the phase voltage and line voltage, and it typically depends on the system configuration, such as star or delta connections. For many systems, the conversion factor is approximately 1.732.
How do I determine which field to leave empty?
Simply leave the field for the parameter you wish to calculate empty while ensuring that the other two fields have valid numerical inputs. The calculator will then compute the missing value.
Can this calculator be used for both star and delta configurations?
This calculator is designed for general three-phase voltage calculations. However, the appropriate conversion factor should be used to match the specific configuration of the electrical system.