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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).

Submersible motors and smoke extraction motors with a temperature class above 400oC shall be excluded. In accordance with the Hong Kong electricity supply context, 50Hz motor is the focus. It is observed that the motors commonly used in Hong Kong are 4-poles. A graphical

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