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Efficiency of an electric motor is defined as the efficiency with which it converts electrical energy to mechanical energy.
It is a fact that motors consume 70% of energy in industry, therefore using high efficiency motors will result in huge savings & reduction in environmental impact.
The demand for standardised efficiency led manufacturers to develop harmonised international standard and push the issue of IEC (International Electrotechnical Commision) Standard IEC 60034-30-1 & adopted in India as IS: 12615: 2011 efficiency classes for Single speed, three phase, cage induction motors.
This new standard defines new classes of efficiency
IE1 Standard Efficiency
IE2 High Efficiency
IE3 Premium Efficiency
IE4 Super Efficiency
Provides common international reference system for classification of motors
Introduces new efficiency measurement method in conformity with standard IEC 60034-1-2: 2007 & IS: 12615 : 2011
Table shows the correspondence among the main class
Scope of Supply for IE2 & IE3 Motors: