IEC Impedance and X/R Calculations
Model |
Motor Type |
Impedance and X/R Calculations |
---|---|---|
Individual |
Induction without AFD |
1) Calculate the MW per pole-pair by dividing MW by pole-pairs.
2) Calculate the X/R ratio of the motor.
Impedance is 16.7%. |
Group |
Induction without AFD |
Impedance and X/R are calculated as follows:
|
Individual or Group |
Induction with AFD DC with AFD |
Impedance is 16.7% and the X/R ratio is 10. |
Individual or Group |
Synchronous Synchronous Condenser |
Uses the ANSI default calculations for impedance and the X/R ratio. |