Efficiency classes of single-speed three-phase, cage-induction motors

Transcription

1 Efficiency classes of single-speed three-phase, cage-induction motors New rules in the EU and Worldwide

2 30-40% of the generated electrical energy worldwide is consumed by electric motors Savings potential by installed motors in the industry [%] [KW] Source: SAVE-Report Improving the Penetration of Energy Efficient Motors and Drives, 1996 Improving efficiency of the complete drive system is assumed to save 30 60% energy. 2

3 A new harmonized worldwide standard was achieved in 2009 Comparison of old and new standards according to IEC IEC US EP Act Local regulations Higher efficiency EFF 1 IE3 Premium Efficiency IE2 High Efficiency NEMA Premium NEMA Energy Efficient Canada, Mexico, Australia, New Zealand, Brazil 2009, China 2011, Switzerland 2011 EFF 2 IE1 Standard Efficiency Brazil, Costa Rica, Israel, Taiwan, China, Switzerland 2010 European Union North America Source: ZVEI Automation: Motors and controlled drives; ABB-Handout motors&generators,

4 Three new classes replacing the original classification Old EFF classes vs. new IE-classification 100 [%] 90 IE 3 IE 2 IE 1 EFF 1 EFF 2* 80 Classified acc. CEMEP 70 1,5 3,5 18, [KW] Source: International Electrotechnical Commission (IEC) and motor suppliers data. *The efficiency of the new IE classes is slightly lower than those of EFF because P LL losses have to be individual measured, instead of global deduction of 0,5% within EFF. 4

5 The changes implemented within the last years Timeline for the implementation of the new regulations IE2 for all motors from 0,75 to 375 KW, type S IE3 for all motors from 0,75 to 375 KW (or IE2 with frequency converter) NEMA Premium /IE3) for all motors from 1 HP to 200 HP, 2,4,6 pole, 230V 460V IE3 for all motors from 7,5 to 375 KW (or IE2 with frequency converter) 5

6 EU regulation is based on IEC standard Scope of IEC and EU-regulations Valid for motors: IEC : 2008 Single speed, three phase cage induction motors 0, KW, 2,4,6-pole, type S1 (continuous duty). Also if completely integrated into a machine. Single speed, three phase cage induction motors with auxiliary devices (shaft sealing, back-stop, shaft encoder, ) 0, KW, 2,4,6-pole, continuous duty. Remark: measurement of efficiency without auxiliary devices. Marking of classes: IE1, IE2, IE3 YES Remark: additional type S3 (intermittent periodic duty 80%) YES Remark: additional type S3 (intermittent periodic duty 80%) EuP Guideline / regulation 640/2009 Statutory minimal standard YES YES Geared motors YES YES Explosion proof motors YES NO Brake motors: A motor with electro-mechanical brake unit operating directly on the shaft without coupling YES NO Motors directly attached to a pump, ventilator, gear or compressor where the efficiency can t be measured independently. Other motors e.g. permanent magnet, polechanging, servo-motors. NO NO NO NO 6

7 There is no rule without exception Exceptions of EU-regulation 640/2009 The following motors are excluded from the directive: Motors designed to operate wholly submerged in a liquid Motors completely integrated into a fan where the motors energy performance cannot be tested independently from the fan Brake motors Motors specifically designed to operate: Motors without a cooling impeller that can therefore not be tested solitude running (most axial fans of Witt & Sohn) At altitudes exceeding 1000 meters above sea level Where ambient temperatures exceeds 40 C Where ambient air temperatures are less than -15 C (any motor) or less than 0 C (air-cooled motors) Maximum operating temperatures above 400 C Where the water coolant temperature at the inlet to a product is less then 5 C or exceeds 25 C In potentially explosive atmospheres as defined EuP Guideline 94/9/EC Motor manufacturer (Siemens, ABB, VEM) believe, that motors made solely for converter operation are also excluded. Source: EuP Regulation No. 640/2009 7

8 How will the motor name plate change? Examples for new motor name plates IE-class 1 and 2 The following information must be shown on the motor name plate according to IEC ; 2008 and European MEPS (Commission Regulation, EC, No 640/2009): Country of manufacture IE-class label Manufacturer IE1-class and efficiency in % Rated voltage, (no voltage range) IE-class label Manufacturer IE2-class and efficiency in % Ambient temperature if relevant Space for additional information's if required Photo Witt&Sohn AG: Example of motor name plate supplied by Siemens 8

9 The implementation has clear rules Examples for daily business Components are regarded as legally introduced (distributed and / or put into operation), if the equipment has been transferred from one legal entity to another. Motors Fans (with motors) manufactured in the EU Fans (with motors) coming from outside the EU( e.g. CH) Replacement motors Motors from consignment stock Export into a non- EEA country If purchased and shipped before the , they are allowed to be sold and to be put into operation according to the rules valid before that date After that, the new rules apply even if manufactured before If the motors were purchased before the , then the fans are allowed to be sold if the motors are minimum IE1 the name of the motor maker is shown If the motors were purchased before the , they are allowed to be sold only if they fulfil minimum IE2. (The key concept is introduction into the EU) Spare motors efficiency class IE1 are not allowed to be supplied after the (only according to item 1) With shipment to the Witt Group in the EU or a distributor s warehouse in the EU motors have moved to another legal entity. If fans/motors are exported by us or our customers into a non-eea country the directive 640/2009 is not applicable but local regulations must be regarded According to the ZVEI (The German electrical manufacturers association, Automation / 2nd edition December

10 New IEC efficiency classes 2011 An important step on the road to global harmonization Source: Motor manufacturer SEW, 9_10 10

11 New IEC efficiency classes 2011 An important step on the road to global harmonization 11