Low Voltage Process Performance Motors (400 V 50Hz, 460V 60Hz).
This standard defines four International Efficiency (IE) classes for single speed electric motors that are rated according to IEC 60034-1 or IEC 60079-0 (explosive atmospheres) and designed for operation on sinusoidal voltage.
• IE4 = Super premium efficiency
• IE3 = Premium efficiency, identical to the stable in 10CFR431 (‘NEMA Premium”) in the USA and CSA C390-10:2015 for 60Hz
• IE2 = High efficiency
• IE1 = Standard efficiency
IEC60034-30-1 covers the power range from 0.12kW up to 1,000kW. 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 includes:
• Single speed electric motors (single and three phase), 50 and 60 Hz
• 2, 4, 6 and 8 poles
• Rated output PN from 0.12kW to 1,000kW
• Rated voltage UN above 50V up to 1 kV
• Motors capable of continuous operated at their rated power with a temperature ruse within the specified insulation temperature class
• Motors, marked with any ambient temperature within the range of -20°C to +60°C
• Motors, marked with an altitude up to 4,000 m above sea level
By comparing IEC 60034-30-1 to CSA C390-10:2015 and 10CFR431 Subpart B – Electric motors, it can be seem 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 also some minor differences in the scope of excluded motors.
