Motor kVA Calculations
There are two ways to calculate motor kVA in the Motor Specifications section of the motor dialog box. The one EasyPower uses depends on which fields you decide to enter. Below the kVA calculation methods are shown in priority order:
If the FLA is greater than 0, the motor kVA is determined by the following equation.
KVA = (1.73)(FLA)(kVmtr)
If the FLA is left blank or 0, the motor kVA will be determined from the following equation.
KVA = (HP)(0.746)/((EFF)(PF))
The above applies to the Motor Specifications kVA. The Short Circuit focus always uses the Motor Specifications kVA for a base value when calculating a motor’s short circuit current. However, the Power Flow focus, which uses the Motor Specifications kVA by default, has the option of using the real-time SCADA kW and kVAR values to calculate kVA. This option is in the motor Power Flow tab of the Motor Data dialog box.
