What makes this different from a simple single-phase calculator?
This optimizer explicitly separates a balanced three-phase contribution from loads that must be assigned to individual phases. A three-phase load adds equally to the modeled phase totals, while single-phase loads can shift the phase distribution.
Methodology
The model starts with the same base and three-phase contribution on every phase. Single-phase loads are sorted from largest to smallest and assigned iteratively to the lightest phase. This is a practical heuristic rather than a proof of a globally optimal engineering design.
The result reports the final phase totals, mean phase total and spread between the highest and lowest phase.
Example
Suppose a balanced three-phase contribution adds 10 units to every phase and the remaining single-phase loads are 7, 6, 4 and 3 units. The optimizer places the larger loads first so that the final phase totals stay as close as the discrete load sizes allow.
Why phase totals alone are not enough
Real electrical systems involve voltage, current, power factor, conductor impedance, neutral effects and equipment-specific behavior. A balanced arithmetic load model therefore cannot certify a field installation.
Limitations and safety
Confirm all final assignments against equipment documentation, protection arrangements, conductor requirements, panel configuration and applicable electrical requirements. This calculator is an allocation aid, not engineering approval.
Frequently asked questions
Are three-phase loads automatically treated as balanced?
Yes, this simplified model distributes their entered value equally across all phases.
Can two single-phase loads be placed on different phases?
Yes. Each single-phase load is assigned independently by the optimizer.
Can this calculate neutral current?
No. Use a dedicated neutral-current analysis tool when that specific quantity is needed.