kW, kVA and power factor workflow
How to move between real power, apparent power and power factor before using Australian current, demand or correction calculators.
Relationship purpose
kW records real power. kVA records apparent power. Power factor connects the two values for a.c. loads. When a load record mixes those terms without context, downstream current, demand and correction estimates become hard to trust.
The useful task is naming which value is known, which value is being solved and whether the source is strong enough for the next calculation.
Workflow
- Identify the known value: kW, kVA or power factor.
- Confirm whether the value is from a nameplate, schedule, meter, design estimate or invoice context.
- Use the kVA/kW/PF calculator to solve only the missing relationship value.
- Carry the result into current, demand or correction review with the input source attached.
Relationship table
| Task | Inputs to prepare | Useful output | Do not infer |
|---|---|---|---|
| Find kVA from kW | kW and PF | Apparent power estimate | Equipment size or network approval |
| Find kW from kVA | kVA and PF | Real power estimate | Actual demand without load context |
| Find PF | kW and kVA | Ratio for review | Correction equipment setting |
| Estimate current | Power value, phase, voltage and PF where needed | Current estimate | Cable suitability |
Boundaries
- Do not use kW as kVA without checking power factor.
- Do not turn a relationship result into equipment selection.
- Do not mix measured and scheduled values without labelling them.
- Do not move the result into a project record unless the input source is named.