Today I am sharing with new simple and easy 3 phase motor current calculation formula for LT motors. In this post, I am sharing with you a nameplate of 3 phase low-voltage induction motor. In the nameplate, all data are given by the manufacturing companies.
3 Phase Motor Current Calculation Formula Explained
In the below image, I have shown a 3-phase motor nameplate. In the motor nameplate, the company provides the motor is 15 KW 3-phase induction motor. The Eff of the motor is 0.89 and PF is 0.85. The volts of the motor are 380V and the Amps are 30.1.
So this data is provided by the company. Now first see the image and after that, we start doing the current calculation of 3 phase motor. That is how completely calculate the current of three phase motor and how 30.1 amperes are given in the nameplate.
For 3-phase low voltage motor current calculation, we need the motor volts, Eff, PF. For three-phase motor amps calculation, the below formula is used.