Time-at-load distribution

Equipment Load Profile Analyzer

Convert equally spaced percent-of-rated-load readings into mean, peak, idle time, overload time, and 10% exposure bands.

Load readings

Use 6–240 equally spaced readings in percent of the same declared rated basis. Keep zeroes.

Method

Each equally spaced reading contributes one sample interval to a load band. Positive readings at a 10% boundary belong to the band ending at that boundary; 0% is reported separately as idle, and values above 100% are retained as an overload-review band.

Hours at load = readings in band × sample interval / 60

Interpretation

A load profile shows exposure, not damage or efficiency. Compare the distribution with the correct rated basis, declared operating region, equipment mode, and source-data quality. A peak may be one reading; mean load may hide cycling.

Worked example and limitations

The 12 sample readings at 15-minute intervals represent 3 hours. Their arithmetic mean is 45%, peak is 100%, and two zero readings produce 0.5 hours of idle exposure. Irregular timestamps must be resampled or analyzed with an interval-aware method before using this tool.