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Induction motors are extensively used at different levels. Small induction motors are used at the domestic level and big induction motors are used at big industrial levels where induction motors are used in big industrial units for various purposes. The induction motors are classified on the basis of their efficiency levels as per the International Efficiency 60034-30-1. On the basis of the efficiency levels, the induction motors are classified into 4 categories which are IE1, IE2, IE3, and IE4. The IE1 motors lie in the Standard Efficiency range. The IE2 motors lie in the High-Efficiency range. The IE3 motors lie in the Premium Efficiency range and the IE4 motors lie in the Super Premium Efficiency range. The efficiency range of each motor shows that the efficiency of the next series is better than the previous series.
IE1 Motors (Standard Efficiency Motors)
The IE1 motors lie in the IE1 class of the international efficiency standard. The output of the IE1 motors is 0.75kW to 355kW. The poles for the IE1 motors are 2, 4, 6, 8, 10, and 12. The speed range of the IE1 motors is from 500rpm to 3600rpm. The rpm frequency for IE1 motors is 50Hz or 60Hz. The aluminum frame size for IE1 motors is 56-200. The cast iron frame size for IE1 motors is 80-400. The temperature class for IE1 motors is B class. The cooling technology for the IE1 motors is IC411. The insulation class is class F. The duty type of the motors is Type S. The protection technology used in IE1 motors is IP55, IP56, IP65, and IP66. The international standards for IE1 motors include IEC 60034-30 and IEC 60034-2-1.
IE2 Motors (High Efficiency)
The IE2 motors lie in the IE2 class of the international efficiency standard. The output of the IE2 motors is 0.75kW to 355kW. The poles for the IE2 motors are 2, 4, and 6. The speed range of the IE2 motors is from 1000rpm to 3600rpm. The rpm frequency for IE2 motors is 50Hz or 60Hz. The aluminum frame size for IE2 motors is 80-160. The cast iron frame size for IE2 motors is 80-400. The temperature class for IE2 motors is B class. The cooling technology for the IE2 motors is IC411. The insulation class is class F. The duty type of the motors is Type S. The protection technology used in IE2 motors is IP55, IP56, IP65, and IP66. The international standards for IE2 motors include IEC 60034-30 and IEC 60034-2-1.
IE3 Motors (Premium Efficiency)
The IE3 motors lie in the IE3 class of the international efficiency standard. The output of the IE3 motors is 0.75kW to 355kW. The poles for the IE3 motors are 2, 4, 6, and 8. The speed range of the IE3 motors is from 750rpm to 3600rpm. The rpm frequency for IE3 motors is 50Hz or 60Hz. The aluminum frame size for IE3 motors is 80-160. The cast iron frame size for IE3 motors is 80-400. The temperature class for IE3 motors is B class. The cooling technology for the IE3 motors is IC411 and IC416. The insulation class is class F. The duty type of the motors is Type S1, S2, and S3. The protection technology used in IE3 motors is IP55, IP56, IP65, and IP66. The international standards for IE3 motors include IEC 60034-1-30.
IE4 Motors (Super Premium Efficiency)
The IE4 motors lie in the IE4 class of the international efficiency standard. The output of the IE4 motors is 2.2kW to 230kW. The poles for the IE4 motors are 2, 4, 6, and 8. The speed range of the IE4 motors is from 750rpm to 3600rpm. The rpm frequency for IE4 motors is 50Hz or 60Hz. The aluminum frame size for IE4 motors is 100-160. The cast iron frame size for IE4 motors is 100-315. The temperature class for IE4 motors is B class. The cooling technology for the IE4 motors is IC411 and IC416. The insulation class is class F. The duty type of the motors is Type S1. The protection technology used in IE4 motors is IP55, IP56, and IP65. The international standards for IE4 motors include IEC 60034-30-1.
