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International Motor Efficiency Standards And Regulations
The world industry and commerce are facing an energy challenge. Global demand for energy is rising steadily. At the same time, pressures to reduce energy consumption, to lower carbon dioxide (CO2) emissions and provide secure power supplies are becoming ever stronger.
Efficient motors help cut energy costs and limit carbon dioxide emissions. It has been estimated that electric motors account for about 65 per cent of the electricity consumed in industrial applications, so the energy-saving potential among industries is enormous. Energy consumption is dependent on the kW rating of the motor, the dimensioning of the application and the hours run. High-efficiency motors as such can play a significant part in reducing CO 2 emissions.
International Motor Efficiency
IEC Standards And Regulations
Since the validation of IEC 60034-30:2008 and its refined version IEC 60034-30-1:2014, a worldwide energy efficiency classification system has existed for low voltage three-phase asynchronous motors. These international standards have been created to enable and increase the level of harmonization in efficiency regulations around the world and to also cover motors for explosive atmospheres.
IEC 60034-30-1:2014 defines International Efficiency (IE) classes for single speed, three-phase, 50 Hz and 60 Hz induction motors. The efficiency levels defined in IEC 60034-30-1 are based on the test method specified in IEC 60034-2-1:2014. To promote transparency in the market, IEC 60034-30-1 states that both the efficiency class and efficiency value must be shown on the motor rating plate and in product documentation. The documentation must clearly indicate the efficiency testing method used as different methods can produce differing results.
IEC 60034-30-1:2014 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.
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 includes:
- Single speed electric motors (single and three-phase), 50 and 60 Hz
- 2, 4, 6 and 8 poles
- Rated output PN from 0.12 kW to 1000 kW
- Rated voltage UN above 50 V up to 1 kV
- Motors capable of continuous operation at their rated power with a temperature rise 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 4000 m above sea level
The following motors are excluded from IEC 60034-30-1:
- Single-speed motors with 10 or more poles or multi-speed motors
- Motors completely integrated into a machine (for example pump, fan or compressor) that cannot be tested separately from the machine
- Brake motors, when the brake cannot be dismantled or separately fed
Nominal efficiency limits defined in IEC 60034-30-1:2014
