Motor efficiencies
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New motor efficiency requirements - IE1, IE2 & IE3

(EU regulation 640/2009 amended by EU regulation 4/2014)

Motor efficiencies for 3-phase single speed electric motors:

IE1 - Standard efficiency (comparable to EFF2)

IE2 - High efficiency (comparable to EFF1)

IE3 - Premium efficiency

IE4 - Super premium efficiency


Motor powers

Motor manufacturer requirements1

From 16/06/20112 0.75 to 75 kW IE2 or better
From 01/01/2015 0.75 to 5.5 kW IE2 or better
7.5 to 75 kW IE3 or better
7.5 to 75 kW with variable speed drive IE2 or better
From 01/01/2017 0.75 to 75 kW IE3 or better
0.75 to 75 kW with variable speed drive IE2 or better


1. The regulations don't apply to motors specified to operate exclusively

i) at altitudes exceeding 4,000 m above sea-level;

ii) where ambient air temperatures exceed 60C;

iii) where ambient air temperatures are less than -30C; 

iv) in potentially explosive atmospheres (ATEX).

Note: The EU regulation 4/2014 amended these exclusions in July 2014.

2. From 16/06/2011, there were new efficiency requirements for most 3-phase single speed motors fitted to our pumps. IE1 and IE2 replaced efficiency classes EFF2 and EFF1.