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Motors efficiency is according to standard of IEC60034-30
which with efficiency grades:
>>IE3 Premium efficiency
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IE2 High efficiency (comparable to old standard grade EFF1)
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IE1 standard (comparable to EFF2)
In china, on the standard of GB18613-2012(itd IEC60034-30),
for the motors 0.75kw-200kw,the Minimum allowable values of
energy efficiency and energy efficiency grades is 3 grade since
1st.Sept.2012.The test should be on the standard of GB1032
method B.
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Efficiency grades 3: equal to IE2
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Efficiency grades 2: equal to IE3