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Report on International Efficiency Efficiency Classes for ...

1of 13 Report on Study on International Efficiency (IE) Efficiency Classes for Low Voltage AC Motors Executive Summary In Hong Kong, the Code of Practice for energy Efficiency of Building Services Installation (Code of Practice) specifies the minimum motor Efficiency for single-speed three-phase totally enclosed motor. These requirements serve to determine the baseline energy performance on motor. Internationally, there is a standard which stipulates the energy Efficiency of low voltage AC motors, namely the International Efficiency (IE).

3of 13 Some particular exemptions are highlighted as follows: Single-speed motors with 10 or more poles or multi-speed motors are excluded; Motors that are completely integrated into a machine, such as a pump, fan and compressor, and frequency-converters that cannot be tested for its efficiency

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