Saving energy has become worldwide increasingly important, so that the homogeneity of a universal system for efficiency classification of low voltage three-phase asynchronous motors was necessary. In March 2009, CENELEC (European Committee for Electrotechnical Standardization) which consists of EU countries members with the addition of Iceland, Norway and Switzerland has therefore in this respect implemented the new International Standard IEC 60034-30:2008 - Rotating electrical machines- Part 30: Efficiency classes of single-speed, three-phase, cage-induction motors (IE Code), by issuing EN 60034-30:2008.
IT COVERS 50 Hz and 60 Hz single-speed three-phase cage-induction motors that:
Furthermore, it covers also:
The following motors are EXCLUDED:
This standard establishes the new international efficiency classesfor three-phase asynchronous motors in:
Efficiency levels in accordance with IEC 60034-30 must be measured applying the method specified in IEC 60034-2-1: direct or indirect.
To determine the efficiency level Cima Spa applies the direct method.
IEC 60034-30 Standard fixes only the requirements regarding efficiency classes, establishing internationally shared measures. Therefore it does not have legislative power and it does not define which motors have to be supplied and their according efficiency level: this is sanctioned by the single legislations in force in the different countries.
US Department of Energy established that starting from 19/12/2010 NEMA ( National Electric Manufacturers Association) Premium requirement becomes the minimum energy-efficiency performance standard for United States motors. In order to obtain this certification, manufacturers will have to have their products tested by accredited laboratories.
Instead, the situation is different in EU countries, since it is the manufacturer’s responsibility to comply with the established standards. A third party certification is not compulsory; however, government agencies will carry out sporadic inspections. In case any device is not in compliance with the prescribed and declared efficiency levels, the manufacturer will be forced to withdraw it from the market at his expense.
Through Directive 2005/32 EC, European Parliament established a framework for the setting of eco-design requirements to be fulfilled by energy-using products, specifying the efficiency levels machines sold on European market will have to reach.
IT COVERS motors defined by IEC 60034-30 and sanctions the obligation to put high efficiency motors on the market according to these dates:
IT DOES NOT COVERS:
|Efficiency Level||Effciency class IEC 6004-30||Uncertainity as per test standard IEC 60034-2-1||Countries adopt performance normatives||Starting data|
|Europa||2015 / 2017*|
|High||IE2||Low Uncertainity||USA||In Force|
*Timing for the entry into force of the efficiency level in the EU:
|Motor type||Norma IEC 60034-30||EUP 2005/32/CE|
|Standard Motors 2. 4, 6 Poles From 0.75 KW Up To 375 KW S1 IP1x Up To IP6x||Yes||Yes|
|Standard Motors With Devices (Gearbox, Encoder…)||Yes - Measures Without Devices||Yes - Measures Without Devices|
|High Temperature Smoke Extraction Motors < 400°C||Yes||Yes|
|Motors For Gearboxes||Yes||Yes|
|ATEX, Brake Motors 2. 4. 6 Poles, From 0.75 KW Up To 375 KW S1 IP4X, 5X, 6X||Yes - Measures Without Devices||Yes - Measures Without Devices|
|Motors On Board For Refrigeration||Yes||No|
|Motors With Short Time Duty S2 Or Intermittent Duty S3, S4…||No||No|
|Motori Speciali Per Variatori (Multi Velocità,…)||No||No|
|Special Motors For Speed Variators (Multi-Speed,…)||No||No|
The standard prescribes that motor efficiency class (IE1 or IE2 or IE3), rated output and efficiency value with full load efficiency at 100%, 75% of load and 50% of load are always mentioned on the plate data.
Here below is an example for a plate that CIMA SpA applies on its motors: the legend describes the parameters and values mentioned on the plate.