Power Survey

Power surveys are conducted to compile meaningful records of energy usage at the service entrance, feeders and individuals loads. These records can be analyzed to prioritize those areas yielding the greatest energy savings. Power surveys also provide information for load scheduling to reduce peak demand and show operational characteristics of loads that may suggest component or system replacement to reduce energy consumption. Only through the measurement of AC power parameters can true cost benefit analysis be per-formed.7

Figure 11.4 Typical part-load efficiency and power factor characteristics
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