
MANUAL MOTOR STARTER GUIDE
APRIL 19
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3.2.3.2 IEC 60034-30-1:2014
This standard defines four International Efficiency (IE) classes for single speed electric motors that are rated accord-
ing to IEC 60034-1 or IEC 60079-0 (explosive atmospheres) and designed for operation on sinusoidal voltage.
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IE4 = Super premium efficiency
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IE3 = Premium efficiency
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IE2 = High efficiency
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IE1 = Standard efficiency
New N/H and NE/HE motor design categories
IE3/IE4 motors are now defined per IEC 60034-12:2016 standards with the following design types:
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Design N
Normal starting torque with a normal locked rotor current
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Design H
High starting torque with a normal locked rotor current
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Design NE
Normal starting torque with a higher locked rotor current
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Design HE
High starting torque with a higher locked rotor current.
IEC 60034-30-1 covers the power range from 0.12 kW up to 1000 kW. Most of the different technical constructions of
electric motors are covered as long as they are rated for direct on-line operation. The coverage of the standard in-
cludes:
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Single speed electric motors (single and three-phase), 50 and 60 Hz
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2, 4, 6 and 8 poles
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Rated output P
N
from 0.12 kW to 1000 kW
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Rated voltage U
N
above 50 V AC up to 1 kV
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Motors capable of continuous operation at their rated power with a temperature rise within the specified
insulation temperature class
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Motors, marked with any ambient temperature within the range of -20 °C to +60 °C
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Motors, marked with an altitude up to 4000 m above sea level
By comparing IEC 60034-30-1 to CSA C390-10:2015 and “10CFR431 Subpart B – Electric motors”, it can be seen that
the efficiency limits and tables are well aligned, and their major difference is in the scope of the output power where
CSA and 10CFR431 have a maximum power of 500 hp. There are some minor differences in the scope of excluded mo-
tors.