Electrical reference chart
Load Testing Chart
Use this worksheet after the calculator result to record equipment ID, rated load, applied load, percent load, voltage/current, temperature rise, runtime, instrument, and action note.
Quick reference table
A load testing chart is a calculator-led testing worksheet. It connects rated load, applied load, electrical measurements, runtime, temperature, and corrective action before an equipment record is closed.
Load testing worksheet
| Item | Record from calculator | Follow-up |
|---|---|---|
| Equipment | ID, rating, nameplate basis | Confirm manufacturer test limits |
| Load step | Applied load and percent load | Record duration and sequence |
| Electrical values | Voltage, current, power, frequency | Compare with expected range |
| Condition values | Temperature, vibration, noise, alarms | Document trend and limits |
| Action | Pass, retest, derate, repair, or monitor | Assign owner and next test date |
Load test sequence record
| Sequence item | Record on worksheet | Why it affects the conclusion |
|---|---|---|
| Pre-test state | Nameplate, ambient, ventilation, starting condition | Baseline conditions affect temperature rise |
| Step load | Percent load, duration, voltage, current | A short step is not the same as a stabilized test |
| Condition response | Temperature, alarms, vibration, noise, frequency | Electrical load may be acceptable while equipment condition is not |
| Post-test action | Cool-down, retest, repair, next interval | The result needs a maintenance decision owner |
How to use this chart
Anchor to nameplate data
Record the rated load and manufacturer basis before comparing measured load.
Track test sequence
Document load steps, runtime, stabilization, and condition readings.
Close action items
Use the chart to assign retest, repair, monitoring, or return-to-service review.
Formula basis
Load percent = measured or applied load / rated load x 100.
- Rated load is the equipment nameplate, project, or manufacturer basis.
- Measured or applied load is the load used during the test interval.
- Runtime is the duration the load was applied.
- Temperature, voltage, and current readings provide condition context for the result.
Worked examples
Generator load-bank record
Record nameplate kW, applied load step, percent load, voltage, current, frequency, temperature, runtime, alarms, and follow-up action.
Transformer temporary load check
Keep nameplate kVA, applied load, ambient temperature, winding or enclosure temperature, runtime, alarms, and follow-up owner in the record.
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Frequently asked questions
These answers explain how to use the chart without turning a quick reference into a final design decision.