current imbalance calculator
Calculate percentage current imbalance in three-phase systems using % I imb= {(Imax - Iavg) / Iavg} * 100
unbalanced current calculation
The currents that do not sum to equal fundamental values on a three phase system create a current imbalance. It is computed as the current maximum minus average current divided by its average average current times 100 percent.
Formula & Table Summary:
\( \%I_{\text{imb}} = \frac{I_{\text{max}} - I_{\text{avg}}}{I_{\text{avg}}} \times 100 \)
Where: \( I_{\text{max}} \) = maximum current, \( I_{\text{avg}} \) = average current
imbalance percentage calculation
The Current Imbalance Calculator calculates the percentage of the lack of balance of the three-phase currents of an electrical system. Too much imbalance may cause overheating, loss of efficiency, and damage to the motor. The equation measures the highest of the measured phase currents to the average of all three phases. Such measurement is important in motor repair, power quality measurement, and the reliability of the electrical system. A 10% load imbalance is usually problematic in most cases, and it needs immediate attention that can be addressed through load balancing or faulty connections. With the calculation of the imbalance, technicians may avoid expensive idle times and prolong the lifetime of the equipment.
three-phase current imbalance
| Phase A (A) | Phase B (A) | Phase C (A) | Iavg (A) | Imax (A) | Imbalance (%) |
|---|---|---|---|---|---|
| 100 | 95 | 90 | 95 | 100 | 5.26 |
| 120 | 115 | 108 | 114.33 | 120 | 4.96 |
| 50 | 48 | 42 | 46.67 | 50 | 7.14 |
| 200 | 190 | 180 | 190 | 200 | 5.26 |
| 75 | 70 | 65 | 70 | 75 | 7.14 |
