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This standard describes methods to evaluate and test the electrical performance of Energy Saving Devices (ESD). It describes measurement methods that focus on monitoring the power absorbed or generated by the observed load or generator without the ESD connected and with the ESD energized. Detailed protocols describe step-by-step the testing circuits to be used, the type and accuracy of needed instrumentation, what particular measurements and in what order are to be taken. Special emphasis is given to sources of measurement errors due to incorrect connection of instrumentation, inadequate instrumentation, or incorrect interpretation of results. The appendix contains practical examples and explains the physical mechanisms of phenomena that may cause errors.
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