1.1 ​Concerning NEMA Premium certification for electric motors which institute a motor manufacturer needs to contact to homologates its products? is it NEMA or DoE? Could you share with me a contact and the institute website?

1.2 ​I have a question regarding motors being sold in North America. Can equipment with S1 duty cycle fitted with IE2 (High Efficiency) motors and VSD still be sold in the USA, or does the motor have to be IE3 (Premium Efficiency)? All the motors in question are over 3 kW.

1.3 Are there any regulations that would prevent older standard efficiency motors from being brought in the states on an existing machine that is being relocated from overseas? If so could you point me to those standards? ​

1.4 We are a subsidiary of an industrial burner's manufacturer from Europe and we are aware that a new regulation regarding motor efficiency will be effective as soon as December 2010. As we utilized an electric motor on our product (flange mounted type IEC), we are wondering if you could confirm whether this type of motor IEC flange mounted electric motor with rating 1–200 Hp falls under Subtype I or Subtype II of the new EISA regulation. As additional information, please find below details regarding our electric motors • Our motors are 3 phase TEFC• HP ranging from 1–60 Hp• Voltage 208–600V/ 3Ph/ 60Hz• Our motors are designed according to IEC specs (type N) however dimensions do not comply with IEC, since our motors have customized flange and shaft to fit into our burners Motors are single speed VFD compatible• 2 poles• Footless• Protection class IP56 designed for continuous operation S1 Based on the above, would you please help me classify whether our motors are subject to EISA 2007 and if so, please verify whether our motors fall into subtype I or subtype II of the regulation.

1.5 Are servo motors and stepper motors exempt from the Energy Independence and Security Act (EISA) because they are single speed? Also, are motors that are one or more frame sizes larger than that listed in the Frame Size Reference Tables for a given horsepower exempt from EISA?

1.6 Can you verify if there is a minimum efficiency rating for standard efficiency vertical hollow shaft motors?

1.7 I was hoping to get some assistance in clarifying the types of motors that are regulated by Department of Energy for High efficiency. It relates to motors we supply integrated into our wire and cable making machines and accessories production lines and PART 431—ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL EQUIPMENT Up until May 2012, the U.S. Department of Energy’s regulations defined motors which are general purpose 3Ph ac single speed motors as the type being controlled. Development in the regulations for proposed rules looking forward from March 2011 can be found at http//www.regulations.gov/#!documentDetail;D=EERE-2010-BT-STD-0027-0017.In this document, Table 2 brings up the motors which were not currently controlled for efficiency ratings such as multi-speed, dc, electronically commutated, 1Phase, permanent magnet, inverter duty, and intermittent duty. It indicated the final date for proposing amendments to the regulation was December 19 2012. As of today, it seems further development of the U.S. code of federal regulations (paragraph 431.12) defines both general purpose and definite purpose motors. Paragraph 431.15 references test procedures (CSA, IEC,IEEE, NEMA & NFPA) for more motor types and incorporates (adds them) to the regulations. Paragraph 431.25 “Energy conservation standards and effective dates” specifies the efficiency ratings in Table 1—Nominal Full-Load Efficiencies of General Purpose Electric Motors (Subtype I), Except Fire Pump Electric Motors (Table 2) Table 3 & table 4. http//www.ecfr.gov/cgi-bin/retrieveECFR?gp=&SID=a48177fcfb7d122f513271ea54671c68&n=10y3.0.1.4.19.2&r=SUBPART&ty=HTML Other links for specific requirements for motor efficiency standards in U.S.http//www1.eere.energy.gov/buildings/appliance_standards/product.aspx/productid/50http//www1.eere.energy.gov/buildings/appliance_standards/product.aspx/productid/40 It would seems to me despite the title “Certain Commercial and Industrial Equipment” of section 431 of the federal regulation, that the purpose of the regulation is to cover all electric motors supplied alone or in a piece of equipment. Would that also be the general consensus of NEMA?

1.8 We have explosion-proof motors that meet minimum efficiency on the table attached, will have the nameplate marked "premium efficiency," and have the motor sold as premium efficiency motor. We understand that by December 19, 2010, all premium efficiency motors will need to meet the nominal efficiency. We are wondering whether we can still sell these motors that meet only minimum efficiency after December 18, 2010, as premium efficiency. Please advise us.

1.9 We offer 2-speed, single winding motors that are primarily used in cooling tower application. They are 1800/900 rpm. Do these need to meet NEMA Premium™ on the 1800 rpm connection or are 2-speed motors not covered under EPAct / EISA?

1.10 I have a copy of NEMA’s white paper on small motors and am hoping you may be able to provide some brief guidance on a related question. I realize that you can’t give official guidance / information, but I’d appreciate your feedback / insight on the following questions Are all of the federal U.S. regulations concerning energy efficiency of motors found in 10 CFR 431 (i.e., there aren’t any other regulations regarding energy efficiency of motors somewhere that I’m missing)? Do you by chance know whether there are any similar (i.e., energy efficiency) regulations for fans, with the exception of ceiling fans (which are covered in 10 CFR 429.32)?

1.11 In clause 31.4.4.2 (Voltage Spikes) from NEMA MG 1, two criteria are established for voltage peak limits at the inverter fed motor terminals. 1. For motors with Vrated up to 600 V, Vpeak should be less than or equal to 3.1*Vrated.2. For motors with Vrated greater than 600 V, Vpeak should be less than or equal to 2.04*Vrated. The idea behind criteria 1 is clear. There is a physical meaning for it that is the total reflection of the voltage waveform at the motor terminals combined with an eventual variation of the input voltage of 10%. However, criteria 2 is not so clear for me. The number 2.04 results from the product between 2.5 and the ratio sqrt(2)/sqrt(3). What is the meaning of these terms? Is there any physical explanation for such consideration? I only understand the reason for the term sqrt(2), that is the consideration of the peak voltage, since Vrated is a rms value. But I cannot understand well the terms sqrt(3) and the 2.5 (is this empirical?). Could you please clarify it?For the vertical hollow shaft motors and oil well pump motors, do they need to be EPAct-rated after December 19, 2010?Where can I find efficiency table and related government regulations for the explosion-proof motors?